Form N-CSRS - Certified Shareholder Report, Semi-Annual (2024)

28/07/2023 7:11pm

Edgar (US Regulatory)

Date: July26, 2023

/s/ Jane Trust

Jane Trust

Chief Executive Officer

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIEDSHAREHOLDER REPORT OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811-22294

Western AssetInvestment Grade Defined Opportunity Trust Inc.

(Exact name of registrant as specified in charter)

620 Eighth Avenue, 47^th Floor, New York, NY 10018

(Address of principal executive offices) (Zip code)

George P.Hoyt

Franklin Templeton

100 First Stamford Place

Stamford, CT 06902

(Nameand address of agent for service)

Registrants telephone number, including area code: 1-888-777-0102

Date of fiscal year end: November30

Date of reporting period: May31, 2023

ITEM1.

REPORT TO STOCKHOLDERS.

The Semi-Annual Report to Stockholders is filed herewith.


Semi-AnnualReport		May31, 2023

WESTERN ASSET

INVESTMENT GRADE DEFINED OPPORTUNITY TRUST INC. (IGI)

INVESTMENT PRODUCTS: NOT FDIC INSURED NO BANK GUARANTEE MAY LOSE VALUE


Whats inside
Letter from the chairman			III
Performance review			IV
Fund at a glance			1
Schedule of investments			2
Statement of assets and liabilities			25
Statement of operations			26
Statements of changes in net assets			27
Financial highlights			28
Notes to financial statements			29
Board approval of management and subadvisory agreements			45
Additional shareholder information			52
Dividend reinvestment plan			53

Fund objectives

The Funds primary investment objective is to provide current income and then to liquidate and distribute substantially all of the Funds net assets tostockholders on or about December2, 2024. As a secondary investment objective, the Fund will seek capital appreciation. There can be no assurance the Fund will achieve its investment objectives.

The Fund seeks to achieve its investment objectives by investing, under normal market conditions, at least 80% of its net assets in investment grade corporate fixedincome securities of varying maturities.


II		Western Asset Investment Grade Defined Opportunity Trust Inc.

Letter from the chairman

Dear Shareholder,

We are pleased to provide the semi-annual report of Western Asset Investment Grade Defined Opportunity Trust Inc. for the six-month reporting period ended May31,2023. Please read on for Fund performance information during the Funds reporting period.

As always, we remain committed to providing you with excellentservice and a full spectrum of investment choices. We also remain committed to supplementing the support you receive from your financial advisor. One way we accomplish this is through our website, www.franklintempleton.com. Here you can gainimmediate access to market and investment information, including:

Fund prices and performance,

Market insights and commentaries from our portfolio managers, and

A host of educational resources.

We look forward to helping you meet your financial goals.

Sincerely,

Jane Trust, CFA

Chairman, President and Chief Executive Officer

June30, 2023


Western Asset Investment Grade Defined Opportunity Trust Inc.		III

Performance review

For the six months ended May31, 2023, Western Asset Investment Grade Defined OpportunityTrust Inc. returned 1.91% based on its net asset value (NAV)ⁱ and 1.53% based on its New York Stock Exchange (NYSE) market price per share. The Funds unmanagedbenchmark, the Bloomberg U.S. Credit Indexⁱⁱ, returned 2.37% for the same period.

The Fund has a practice ofseeking to maintain a relatively stable level of distributions to shareholders. This practice has no impact on the Funds investment strategy and may reduce the Funds NAV. The Funds manager believes the practice helps maintain theFunds competitiveness and may benefit the Funds market price and premium/discount to the Funds NAV.

During the six-month period, the Fund madedistributions to shareholders totaling $0.40 per share. As of May31, 2023, the Fund estimates that all of the distributions were sourced from net investment income.* The performance table shows the Funds six-month total return based onits NAV and market price as of May31, 2023. Past performance is no guarantee of future results.


Performance Snapshot as of May31, 2023 (unaudited)
Price Per Share	6-Month TotalReturn**
$17.16 (NAV)		1.91	%
$16.33 (Market Price)		1.53	%

All figures represent past performance and are not a guarantee of future results. Performance figures for periods shorter than one yearrepresent cumulative figures and are not annualized.

** Total returns are based on changes in NAV or market price, respectively. Returns reflect the deductionof all Fund expenses, including management fees, operating expenses, and other Fund expenses. Returns do not reflect the deduction of brokerage commissions or taxes that investors may pay on distributions or the sale of shares.

 Total return assumes the reinvestment of all distributions, including returns of capital, if any, at NAV.

 Total return assumes the reinvestment of all distributions, including returns of capital, if any, in additional shares in accordance with the FundsDividend Reinvestment Plan.

Looking for additional information?

The Fund is traded under the symbol IGI and its closing market price is available in most newspapers under the NYSE listings. The daily NAV is availableonline under the symbol XIGIX on most financial websites. Barrons and The Wall Street Journals Monday edition both carry closed-end fund tables that provide additional information. In addition, the Fund

These estimates are not for tax purposes. The Fund will issue a Form 1099 with final composition of the distributions fortax purposes after year-end. A return of capital is not taxable and results in a reduction in the tax basis of a shareholders investment. For more information about a distributions composition, please refer to the Fundsdistribution press release or, if applicable, the Section19 notice located in the press release section of our website, www.franklintempleton.com.


IV		Western Asset Investment Grade Defined Opportunity Trust Inc.

issues a quarterly press release that can be foundon most major financial websites as well as www.fraklintempleton.com.

In a continuing effort to provide information concerning the Fund, shareholders may call1-888-777-0102 (toll free), Monday through Friday from 8:00 a.m. to 5:30 p.m. Eastern Time, for the Funds current NAV, market price and other information.

Thank you for your investment in Western Asset Investment Grade Defined Opportunity Trust Inc. As always, we appreciate that you have chosen us to manage your assets andwe remain focused on achieving the Funds investment goals.

Sincerely,

Jane Trust, CFA

Chairman, President and Chief Executive Officer

June30, 2023

RISKS: The Fund is a non-diversified, limited term, closed-end management investment company designedprimarily as a long-term investment and not as a trading vehicle. The Fund is not intended to be a complete investment program and, due to the uncertainty inherent in all investments, there can be no assurance that the Fund will achieve itsinvestment objectives. The Funds common stock is traded on the New York Stock Exchange. Similar to stocks, the Funds share price will fluctuate with market conditions and, at the time of sale, may be worth more or less than the originalinvestment. Shares of closed-end funds often trade at a discount to their net asset value. Because the Fund is non-diversified, it may be more susceptible to economic, political or regulatory events than a diversified fund. The Fundsinvestments are subject to a number of risks, including credit risk, inflation risk and interest rate risk. As interest rates rise, bond prices fall, reducing the value of the Funds holdings. The Fund may invest in lower-rated high-yield bondsor junk bonds, which are subject to greater liquidity and credit risk (risk of default) than higher-rated obligations. The Fund may use derivatives, such as options and futures, which can be illiquid, may disproportionately increaselosses and have a potentially large impact on Fund performance. The Fund may invest in securities or engage in transactions that have the economic effects of leverage which can increase the risk and volatility of the Fund. The market values ofsecurities or other assets will fluctuate, sometimes sharply and unpredictably, due to changes in general market conditions, overall economic trends or events, governmental actions or intervention, actions taken by the U.S. Federal Reserve orforeign central banks, market disruptions caused by trade disputes or other factors, political developments, armed conflicts, economic sanctions and countermeasures in response to sanctions, major cybersecurity events, investor sentiment, the globaland domestic effects of a pandemic, and other factors that may or may not be related to the issuer of the security or other


Western Asset Investment Grade Defined Opportunity Trust Inc.		V

Performance review (contd)

asset. The Fund may also invest in money market funds, including funds affiliated with theFunds manager and subadvisers.

All investments are subject to risk including the possible loss of principal. Past performance is no guarantee of futureresults. All index performance reflects no deduction for fees, expenses or taxes. Please note that an investor cannot invest directly in an index.

ⁱ

Net asset value (NAV) is calculated by subtracting total liabilities, including liabilities associated withfinancial leverage (if any), from the closing value of all securities held by the Fund (plus all other assets) and dividing the result (total net assets) by the total number of the common shares outstanding. The NAV fluctuates with changes in themarket prices of securities in which the Fund has invested. However, the price at which an investor may buy or sell shares of the Fund is the Funds market price as determined by supply of and demand for the Funds shares.

ⁱⁱ	The Bloomberg U.S. Credit Index is an index composed of corporate and non-corporate debt issues that are investment grade(rated Baa3/BBB or higher).


VI		Western Asset Investment Grade Defined Opportunity Trust Inc.

Fund at a glance (unaudited)

Investment breakdown (%)as a percent of totalinvestments

The bar graph above represents the composition of the Funds investments as of May31, 2023 andNovember30, 2022 and does not include derivatives, such as futures contracts, forward foreign currency contracts and swap contracts. The Fund is actively managed. As a result, the composition of the Funds investments is subject to changeat any time.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					1

Schedule of investments (unaudited)

May 31, 2023

Western Asset Investment GradeDefined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Corporate Bonds& Notes 94.9%
Communication Services 10.4%
Diversified Telecommunication Services 3.0%
AT&T Inc., Senior Notes		4.500	%		5/15/35		370,000	$	341,172
AT&T Inc., Senior Notes		4.900	%		6/15/42		250,000		225,133
AT&T Inc., Senior Notes		4.800	%		6/15/44		290,000		254,549
AT&T Inc., Senior Notes		4.500	%		3/9/48		422,000		353,767
AT&T Inc., Senior Notes		3.300	%		2/1/52		190,000		131,823
AT&T Inc., Senior Notes		3.500	%		9/15/53		180,000		125,064
AT&T Inc., Senior Notes		3.800	%		12/1/57		150,000		106,822
AT&T Inc., Senior Notes		3.500	%		2/1/61		260,000		178,319
British Telecommunications PLC, Senior Notes		9.625	%		12/15/30		1,550,000		1,920,371
Telefonica Emisiones SA, Senior Notes		7.045	%		6/20/36		140,000		153,014
Telefonica Europe BV, Senior Notes		8.250	%		9/15/30		390,000		457,377
Verizon Communications Inc., Senior Notes		4.329	%		9/21/28		218,000		211,964
Verizon Communications Inc., Senior Notes		5.500	%		3/16/47		1,130,000		1,118,451
Verizon Communications Inc., Senior Notes		3.700	%		3/22/61		100,000		71,364
Total DiversifiedTelecommunication Services									5,649,190
Entertainment 2.7%
Walt Disney Co., Senior Notes		6.650	%		11/15/37		2,400,000		2,750,166
Warnermedia Holdings Inc., Senior Notes		5.141	%		3/15/52		2,830,000		2,210,734
Total Entertainment									4,960,900
Media 4.0%
CCO Holdings LLC/CCO Holdings Capital Corp., Senior Notes		4.500	%		5/1/32		910,000		713,107
Charter Communications Operating LLC/Charter Communications Operating Capital Corp.,Senior Secured Notes		6.384	%		10/23/35		180,000		174,301
Charter Communications Operating LLC/Charter Communications Operating Capital Corp.,Senior Secured Notes		3.500	%		3/1/42		120,000		78,450
Charter Communications Operating LLC/Charter Communications Operating Capital Corp.,Senior Secured Notes		6.484	%		10/23/45		420,000		380,469
Charter Communications Operating LLC/Charter Communications Operating Capital Corp.,Senior Secured Notes		5.375	%		5/1/47		560,000		447,278
Charter Communications Operating LLC/Charter Communications Operating Capital Corp.,Senior Secured Notes		5.750	%		4/1/48		110,000		91,160

See Notes to FinancialStatements.


2				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Media continued
Charter Communications Operating LLC/Charter Communications Operating Capital Corp.,Senior Secured Notes		5.250	%		4/1/53		250,000	$	195,128
Charter Communications Operating LLC/Charter Communications Operating Capital Corp.,Senior Secured Notes		3.950	%		6/30/62		120,000		72,019
Charter Communications Operating LLC/Charter Communications Operating Capital Corp.,Senior Secured Notes		5.500	%		4/1/63		330,000		255,541
Comcast Corp., Senior Notes		6.400	%		5/15/38		2,500,000		2,794,071
DISH DBS Corp., Senior Secured Notes		5.750	%		12/1/28		250,000		181,800	^(a)
Fox Corp., Senior Notes		5.476	%		1/25/39		810,000		750,892
Paramount Global, Senior Notes		5.250	%		4/1/44		80,000		60,343
Time Warner Cable Enterprises LLC, Senior Secured Notes		8.375	%		7/15/33		370,000		410,927
Time Warner Cable LLC, Senior Secured Notes		6.550	%		5/1/37		370,000		352,806
Time Warner Cable LLC, Senior Secured Notes		7.300	%		7/1/38		330,000		337,377
Time Warner Cable LLC, Senior Secured Notes		6.750	%		6/15/39		20,000		18,951
Time Warner Cable LLC, Senior Secured Notes		5.500	%		9/1/41		200,000		165,482
Total Media									7,480,102
Wireless Telecommunication Services 0.7%
Sprint LLC, Senior Notes		7.875	%		9/15/23		120,000		120,466
Sprint LLC, Senior Notes		7.125	%		6/15/24		230,000		232,570
T-Mobile USA Inc., Senior Notes		4.375	%		4/15/40		100,000		87,867
T-Mobile USA Inc., Senior Notes		3.000	%		2/15/41		100,000		72,306
T-Mobile USA Inc., Senior Notes		4.500	%		4/15/50		330,000		281,526
T-Mobile USA Inc., Senior Notes		3.400	%		10/15/52		360,000		252,452
Vodafone Group PLC, Senior Notes		5.250	%		5/30/48		320,000		297,150
Vodafone Group PLC, Senior Notes		4.250	%		9/17/50		20,000		15,761
Total Wireless TelecommunicationServices									1,360,098
Total Communication Services									19,450,290
Consumer Discretionary 5.3%
Automobiles 1.1%
Ford Motor Co., Senior Notes		3.250	%		2/12/32		470,000		357,563
Ford Motor Credit Co. LLC, Senior Notes		2.700	%		8/10/26		630,000		558,163
General Motors Co., Senior Notes		6.125	%		10/1/25		300,000		304,677
General Motors Co., Senior Notes		6.600	%		4/1/36		290,000		294,610
General Motors Co., Senior Notes		6.750	%		4/1/46		580,000		577,325
Total Automobiles									2,092,338

See Notes to FinancialStatements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					3

Schedule of investments(unaudited) (contd)

May 31, 2023

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Broadline Retail 0.4%
Amazon.com Inc., Senior Notes		3.875	%		8/22/37		410,000	$	376,143
Amazon.com Inc., Senior Notes		3.950	%		4/13/52		520,000		445,427
Total Broadline Retail									821,570
Diversified Consumer Services 0.1%
Washington University, Senior Notes		3.524	%		4/15/54		150,000		119,689
Washington University, Senior Notes		4.349	%		4/15/2122		170,000		139,579
Total Diversified ConsumerServices									259,268
Hotels, Restaurants& Leisure 2.1%
Genting New York LLC/GENNY Capital Inc., Senior Notes		3.300	%		2/15/26		740,000		661,533	^(a)
Marriott International Inc., Senior Notes		3.600	%		4/15/24		320,000		315,721
McDonalds Corp., Senior Notes		4.700	%		12/9/35		260,000		253,478
McDonalds Corp., Senior Notes		4.875	%		12/9/45		370,000		348,896
Melco Resorts Finance Ltd., Senior Notes		5.375	%		12/4/29		590,000		473,857	^(a)
Sands China Ltd., Senior Notes		5.625	%		8/8/25		690,000		671,954
Sands China Ltd., Senior Notes		5.900	%		8/8/28		200,000		189,165
Sands China Ltd., Senior Notes		4.875	%		6/18/30		220,000		192,992
Sands China Ltd., Senior Notes		3.750	%		8/8/31		510,000		410,310
Wynn Macau Ltd., Senior Notes		5.500	%		10/1/27		370,000		321,463	^(a)
Total Hotels, Restaurants&Leisure									3,839,369
Household Durables 0.4%
Lennar Corp., Senior Notes		5.000	%		6/15/27		290,000		286,063
MDC Holdings Inc., Senior Notes		2.500	%		1/15/31		300,000		233,326
MDC Holdings Inc., Senior Notes		6.000	%		1/15/43		310,000		273,239
Total Household Durables									792,628
Specialty Retail 1.2%
Home Depot Inc., Senior Notes		3.900	%		12/6/28		930,000		909,110
Home Depot Inc., Senior Notes		3.300	%		4/15/40		100,000		80,328
Home Depot Inc., Senior Notes		3.350	%		4/15/50		80,000		59,769
Home Depot Inc., Senior Notes		3.625	%		4/15/52		420,000		327,297
Lithia Motors Inc., Senior Notes		4.625	%		12/15/27		170,000		157,630	^(a)
Lithia Motors Inc., Senior Notes		3.875	%		6/1/29		300,000		258,859	^(a)
Lowes Cos. Inc., Senior Notes		4.250	%		4/1/52		440,000		352,296
Total Specialty Retail									2,145,289
Total Consumer Discretionary									9,950,462
Consumer Staples 3.3%
Beverages 1.1%
Anheuser-Busch InBev Worldwide Inc., Senior Notes		4.600	%		4/15/48		1,730,000		1,591,166

See Notes to FinancialStatements.


4				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Beverages continued
Coca-Cola Co., Senior Notes		4.125	%		3/25/40		290,000	$	266,177
Coca-Cola Co., Senior Notes		4.200	%		3/25/50		160,000		148,557
Total Beverages									2,005,900
Food Products 0.2%
Kraft Heinz Foods Co., Senior Notes		5.000	%		6/4/42		160,000		149,260
Mars Inc., Senior Notes		3.200	%		4/1/30		220,000		201,793	^(a)
Total Food Products									351,053
Tobacco 2.0%
Altria Group Inc., Senior Notes		3.800	%		2/14/24		290,000		286,616
Altria Group Inc., Senior Notes		4.400	%		2/14/26		500,000		494,642
Altria Group Inc., Senior Notes		4.800	%		2/14/29		1,360,000		1,330,815
Altria Group Inc., Senior Notes		3.875	%		9/16/46		80,000		55,528
Imperial Brands Finance PLC, Senior Notes		6.125	%		7/27/27		510,000		519,143	^(a)
Reynolds American Inc., Senior Notes		8.125	%		5/1/40		470,000		507,949
Reynolds American Inc., Senior Notes		7.000	%		8/4/41		510,000		506,712
Total Tobacco									3,701,405
Total Consumer Staples									6,058,358
Energy 12.7%
Energy Equipment& Services 0.4%
Halliburton Co., Senior Notes		5.000	%		11/15/45		930,000		826,295
Oil, Gas& Consumable Fuels 12.3%
Apache Corp., Senior Notes		6.000	%		1/15/37		84,000		77,924
Apache Corp., Senior Notes		5.100	%		9/1/40		60,000		49,441
Apache Corp., Senior Notes		5.250	%		2/1/42		160,000		130,154
Apache Corp., Senior Notes		4.750	%		4/15/43		670,000		503,525
Cameron LNG LLC, Senior Secured Notes		3.302	%		1/15/35		40,000		33,400	^(a)
Cameron LNG LLC, Senior Secured Notes		3.701	%		1/15/39		50,000		40,974	^(a)
Cheniere Energy Partners LP, Senior Notes		3.250	%		1/31/32		360,000		294,948
Chevron USA Inc., Senior Notes		5.250	%		11/15/43		240,000		244,205
ConocoPhillips, Senior Notes		6.500	%		2/1/39		1,500,000		1,717,525
Continental Resources Inc., Senior Notes		2.268	%		11/15/26		130,000		116,311	^(a)
Continental Resources Inc., Senior Notes		4.375	%		1/15/28		430,000		404,529
Continental Resources Inc., Senior Notes		2.875	%		4/1/32		180,000		138,309	^(a)
Continental Resources Inc., Senior Notes		4.900	%		6/1/44		140,000		105,322
Coterra Energy Inc., Senior Notes		3.900	%		5/15/27		250,000		237,452
Devon Energy Corp., Senior Notes		5.850	%		12/15/25		560,000		567,657
Devon Energy Corp., Senior Notes		4.500	%		1/15/30		116,000		109,170
Devon Energy Corp., Senior Notes		5.600	%		7/15/41		20,000		18,578
Devon Energy Corp., Senior Notes		5.000	%		6/15/45		210,000		180,445

See Notes to FinancialStatements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					5

Schedule of investments(unaudited) (contd)

May 31, 2023

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Oil, Gas& Consumable Fuels continued
Diamondback Energy Inc., Senior Notes		6.250	%		3/15/53		370,000	$	372,117
Ecopetrol SA, Senior Notes		5.875	%		5/28/45		404,000		266,248
Energy Transfer LP, Junior Subordinated Notes (6.750% to 5/15/25 then 5 year TreasuryConstant Maturity Rate + 5.134%)		6.750	%		5/15/25		330,000		291,016	^(b)(c)
Energy Transfer LP, Junior Subordinated Notes (7.125% to 5/15/30 then 5 year TreasuryConstant Maturity Rate + 5.306%)		7.125	%		5/15/30		880,000		741,871	^(b)(c)
Energy Transfer LP, Senior Notes		3.900	%		7/15/26		630,000		601,680
Energy Transfer LP, Senior Notes		5.250	%		4/15/29		20,000		19,758
Energy Transfer LP, Senior Notes		6.625	%		10/15/36		20,000		20,554
Energy Transfer LP, Senior Notes		5.800	%		6/15/38		60,000		57,304
Enterprise Products Operating LLC, Senior Notes		4.250	%		2/15/48		400,000		330,661
Enterprise Products Operating LLC, Senior Notes		3.300	%		2/15/53		230,000		160,381
Enterprise Products Operating LLC, Senior Notes		3.950	%		1/31/60		210,000		157,061
Enterprise Products Operating LLC, Senior Notes (5.375% to 2/15/28 then 3 mo. USD LIBOR +2.570%)		5.375	%		2/15/78		700,000		572,139	^(c)
EOG Resources Inc., Senior Notes		4.375	%		4/15/30		370,000		364,990
Exxon Mobil Corp., Senior Notes		4.227	%		3/19/40		220,000		201,545
Florida Gas Transmission Co. LLC, Senior Notes		2.300	%		10/1/31		820,000		658,607	^(a)
KazMunayGas National Co. JSC, Senior Notes		3.500	%		4/14/33		240,000		180,519	^(a)
Kinder Morgan Inc., Senior Notes		7.800	%		8/1/31		900,000		1,012,353
MPLX LP, Senior Notes		4.500	%		4/15/38		600,000		516,803
Occidental Petroleum Corp., Senior Notes		7.875	%		9/15/31		710,000		786,463
Occidental Petroleum Corp., Senior Notes		4.400	%		4/15/46		10,000		7,592
Parsley Energy LLC/Parsley Finance Corp., Senior Notes		4.125	%		2/15/28		330,000		308,679	^(a)
Petrobras Global Finance BV, Senior Notes		7.375	%		1/17/27		530,000		553,484
Petrobras Global Finance BV, Senior Notes		5.500	%		6/10/51		160,000		124,772
Petroleos Mexicanos, Senior Notes		6.875	%		8/4/26		730,000		667,086
Petroleos Mexicanos, Senior Notes		6.625	%		6/15/35		460,000		311,119
Southern Natural Gas Co. LLC, Senior Notes		8.000	%		3/1/32		1,500,000		1,724,584
Southwestern Energy Co., Senior Notes		4.750	%		2/1/32		90,000		77,962
Targa Resources Corp., Senior Notes		4.950	%		4/15/52		260,000		206,849

See Notes to FinancialStatements.


6				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Oil, Gas& Consumable Fuels continued
Targa Resources Partners LP/Targa Resources Partners Finance Corp., Senior Notes		6.875	%		1/15/29		310,000	$	314,273
Transcontinental Gas Pipe Line Co. LLC, Senior Notes		7.850	%		2/1/26		760,000		805,561
Transcontinental Gas Pipe Line Co. LLC, Senior Notes		7.250	%		12/1/26		180,000		189,214
Transcontinental Gas Pipe Line Co. LLC, Senior Notes		3.250	%		5/15/30		230,000		205,097
Transcontinental Gas Pipe Line Co. LLC, Senior Notes		5.400	%		8/15/41		10,000		9,588
Transcontinental Gas Pipe Line Co. LLC, Senior Notes		4.450	%		8/1/42		860,000		736,031
Transcontinental Gas Pipe Line Co. LLC, Senior Notes		3.950	%		5/15/50		30,000		23,173
Western Midstream Operating LP, Senior Notes		4.650	%		7/1/26		1,560,000		1,506,828
Western Midstream Operating LP, Senior Notes		4.750	%		8/15/28		890,000		841,745
Western Midstream Operating LP, Senior Notes		4.300	%		2/1/30		140,000		124,643
Western Midstream Operating LP, Senior Notes		5.450	%		4/1/44		120,000		100,123
Western Midstream Operating LP, Senior Notes		5.500	%		2/1/50		430,000		343,712
Williams Cos. Inc., Senior Notes		4.550	%		6/24/24		1,130,000		1,116,421
Williams Cos. Inc., Senior Notes		7.750	%		6/15/31		62,000		68,809
Williams Cos. Inc., Senior Notes		8.750	%		3/15/32		148,000		176,593
Williams Cos. Inc., Senior Notes		3.500	%		10/15/51		70,000		47,796
Total Oil, Gas& ConsumableFuels									22,873,673
Total Energy									23,699,968
Financials 31.7%
Banks 18.3%
Banco Mercantil del Norte SA, Junior Subordinated Notes (7.500% to 6/27/29 then10year Treasury Constant Maturity Rate + 5.470%)		7.500	%		6/27/29		200,000		172,754	^(a)(b)(c)
Banco Mercantil del Norte SA, Junior Subordinated Notes (7.625% to 1/10/28 then10year Treasury Constant Maturity Rate + 5.353%)		7.625	%		1/10/28		400,000		357,300	^(a)(b)(c)

See Notes to FinancialStatements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					7

Schedule of investments(unaudited) (contd)

May 31, 2023

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Banks continued
Banco Mercantil del Norte SA, Junior Subordinated Notes (8.375% to 10/14/30 then 10 yearTreasury Constant Maturity Rate + 7.760%)		8.375	%		10/14/30		200,000	$	183,350	^(a)(b)(c)
Bank of America Corp., Junior Subordinated Notes (6.100% to 3/17/25 then 3 mo. Term SOFR +4.160%)		6.100	%		3/17/25		590,000		576,725	^(b)(c)
Bank of America Corp., Junior Subordinated Notes (6.250% to 9/5/24 then 3 mo. Term SOFR +3.967%)		6.250	%		9/5/24		880,000		865,920	^(b)(c)
Bank of America Corp., Junior Subordinated Notes (6.500% to 10/23/24 then 3 mo. Term SOFR+ 4.436%)		6.500	%		10/23/24		400,000		401,000	^(b)(c)
Bank of America Corp., Senior Notes		5.875	%		2/7/42		1,340,000		1,412,083
Bank of America Corp., Senior Notes (2.572%to 10/20/31 then SOFR + 1.210%)		2.572	%		10/20/32		230,000		186,902	^(c)
Bank of America Corp., Senior Notes (4.083%to 3/20/50 then 3 mo. Term SOFR +3.412%)		4.083	%		3/20/51		250,000		201,354	^(c)
Bank of America Corp., Senior Notes (4.271%to 7/23/28 then 3 mo. Term SOFR +1.572%)		4.271	%		7/23/29		690,000		656,433	^(c)
Bank of America Corp., Subordinated Notes		7.750	%		5/14/38		670,000		797,457
Bank of Nova Scotia, Subordinated Notes (4.588% to 5/4/32 then 5 year Treasury ConstantMaturity Rate + 2.050%)		4.588	%		5/4/37		560,000		486,957	^(c)
Barclays PLC, Junior Subordinated Notes (6.125% to 6/15/26 then 5 year Treasury ConstantMaturity Rate + 5.867%)		6.125	%		12/15/25		1,660,000		1,438,058	^(b)(c)
Barclays PLC, Junior Subordinated Notes (7.750% to 9/15/23 then USD 5 year ICE Swap Rate +4.842%)		7.750	%		9/15/23		320,000		310,438	^(b)(c)
Barclays PLC, Subordinated Notes (5.088% to 6/20/29 then 3 mo. USD LIBOR +3.054%)		5.088	%		6/20/30		500,000		464,811	^(c)
BNP Paribas SA, Junior Subordinated Notes (7.375% to 8/19/25 then USD 5 year ICE Swap Rate+ 5.150%)		7.375	%		8/19/25		1,520,000		1,482,310	^(a)(b)(c)
Citigroup Inc., Junior Subordinated Notes (6.250% to 8/15/26 then 3 mo. Term SOFR +4.779%)		6.250	%		8/15/26		1,100,000		1,067,015	^(b)(c)
Citigroup Inc., Junior Subordinated Notes (6.300% to 5/15/24 then 3 mo. Term SOFR +3.685%)		6.300	%		5/15/24		1,350,000		1,280,677	^(b)(c)

See Notes to FinancialStatements.


8				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Banks continued
Citigroup Inc., Senior Notes		8.125	%		7/15/39		752,000	$	956,229
Citigroup Inc., Senior Notes		4.650	%		7/23/48		780,000		694,025
Citigroup Inc., Senior Notes (3.785% to 3/17/32 then SOFR + 1.939%)		3.785	%		3/17/33		620,000		550,842	^(c)
Citigroup Inc., Subordinated Notes		4.600	%		3/9/26		490,000		478,328
Citigroup Inc., Subordinated Notes		4.125	%		7/25/28		1,990,000		1,869,642
Citigroup Inc., Subordinated Notes		6.675	%		9/13/43		630,000		671,225
Citigroup Inc., Subordinated Notes (6.174% to 5/25/33 then SOFR + 2.661%)		6.174	%		5/25/34		380,000		385,601	^(c)
Cooperatieve Rabobank UA, Senior Notes		5.750	%		12/1/43		250,000		248,967
Credit Agricole SA, Junior Subordinated Notes (8.125% to 12/23/25 then USD 5 year ICE SwapRate + 6.185%)		8.125	%		12/23/25		1,370,000		1,378,562	^(a)(b)(c)
Danske Bank A/S, Senior Notes		5.375	%		1/12/24		530,000		525,961	^(a)
HSBC Holdings PLC, Junior Subordinated Notes (6.375% to 9/17/24 then USD 5 year ICE SwapRate + 3.705%)		6.375	%		9/17/24		800,000		767,223	^(b)(c)
HSBC Holdings PLC, Junior Subordinated Notes (6.500% to 3/23/28 then USD 5 year ICE SwapRate + 3.606%)		6.500	%		3/23/28		460,000		415,947	^(b)(c)
HSBC Holdings PLC, Senior Notes		4.950	%		3/31/30		200,000		195,639
HSBC Holdings PLC, Senior Notes (6.254% to 3/9/33 then SOFR + 2.390%)		6.254	%		3/9/34		1,300,000		1,338,042	^(c)
HSBC Holdings PLC, Subordinated Notes (4.762% to 3/29/32 then SOFR + 2.530%)		4.762	%		3/29/33		470,000		425,858	^(c)
Intesa Sanpaolo SpA, Senior Notes		7.000	%		11/21/25		290,000		296,579	^(a)
Intesa Sanpaolo SpA, Senior Notes		4.700	%		9/23/49		200,000		148,435	^(a)
Intesa Sanpaolo SpA, Subordinated Notes (4.198% to 6/1/31 then 1 year Treasury ConstantMaturity Rate + 2.600%)		4.198	%		6/1/32		200,000		151,527	^(a)(c)
Intesa Sanpaolo SpA, Subordinated Notes (4.950% to 6/1/41 then 1 year Treasury ConstantMaturity Rate + 2.750%)		4.950	%		6/1/42		430,000		276,828	^(a)(c)
JPMorgan Chase& Co., Junior Subordinated Notes (6.000% to 8/1/23 then 3 mo. TermSOFR + 3.562%)		6.000	%		8/1/23		700,000		697,970	^(b)(c)
JPMorgan Chase& Co., Senior Notes		6.400	%		5/15/38		1,500,000		1,677,586
JPMorgan Chase& Co., Subordinated Notes		5.625	%		8/16/43		760,000		768,187

See Notes to FinancialStatements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					9

Schedule of investments(unaudited) (contd)

May 31, 2023

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Banks continued
Lloyds Banking Group PLC, Junior Subordinated Notes (6.750% to 6/27/26 then 5 yearTreasury Constant Maturity Rate + 4.815%)		6.750	%		6/27/26		220,000	$	205,884	^(b)(c)
Lloyds Banking Group PLC, Junior Subordinated Notes (7.500% to 6/27/24 then USD 5 year ICESwap Rate + 4.760%)		7.500	%		6/27/24		620,000		597,447	^(b)(c)
Lloyds Banking Group PLC, Junior Subordinated Notes (7.500% to 9/27/25 then USD 5 year ICESwap Rate + 4.496%)		7.500	%		9/27/25		470,000		444,150	^(b)(c)
Lloyds Banking Group PLC, Junior Subordinated Notes (8.000% to 3/27/30 then 5 yearTreasury Constant Maturity Rate + 3.913%)		8.000	%		9/27/29		410,000		377,863	^(b)(c)
NatWest Group PLC, Subordinated Notes		6.100	%		6/10/23		840,000		839,760
NatWest Group PLC, Subordinated Notes (3.754% to 11/1/24 then 5 year Treasury ConstantMaturity Rate + 2.100%)		3.754	%		11/1/29		200,000		188,417	^(c)
PNC Bank NA, Subordinated Notes		4.050	%		7/26/28		650,000		604,311
UniCredit SpA, Subordinated Notes (7.296% to 4/2/29 then USD 5 year ICE Swap Rate +4.914%)		7.296	%		4/2/34		1,610,000		1,533,597	^(a)(c)
Wells Fargo& Co., Senior Notes (3.196% to 6/17/26 then 3 mo. Term SOFR +1.432%)		3.196	%		6/17/27		320,000		300,510	^(c)
Wells Fargo& Co., Senior Notes (4.611% to 4/25/52 then SOFR + 2.130%)		4.611	%		4/25/53		600,000		518,136	^(c)
Wells Fargo& Co., Senior Notes (5.013% to 4/4/50 then 3 mo. Term SOFR +4.502%)		5.013	%		4/4/51		350,000		320,564	^(c)
Wells Fargo& Co., Subordinated Notes		4.400	%		6/14/46		420,000		340,063
Wells Fargo& Co., Subordinated Notes		4.750	%		12/7/46		530,000		447,270
Westpac Banking Corp., Subordinated Notes		4.421	%		7/24/39		170,000		141,157
Total Banks									34,119,876
Capital Markets 6.9%
Charles Schwab Corp., Junior Subordinated Notes (4.000% to 12/1/30 then 10 year TreasuryConstant Maturity Rate + 3.079%)		4.000	%		12/1/30		500,000		376,750	^(b)(c)
Charles Schwab Corp., Senior Notes		3.850	%		5/21/25		230,000		222,551
Charles Schwab Corp., Senior Notes (5.853%to 5/19/33 then SOFR + 2.500%)		5.853	%		5/19/34		410,000		415,914	^(c)
CI Financial Corp., Senior Notes		4.100	%		6/15/51		250,000		149,989
CME Group Inc., Senior Notes		5.300	%		9/15/43		750,000		773,694

See Notes to FinancialStatements.


10				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Capital Markets continued
Credit Suisse Group AG, Junior Subordinated Notes (5.250% to 8/11/27 then 5 year TreasuryConstant Maturity Rate + 4.889%)		5.250	%		2/11/27		1,660,000	$	58,100	*^(a)(b)(c)(d)
Credit Suisse Group AG, Junior Subordinated Notes (9.750% to 12/23/27 then 5 year TreasuryConstant Maturity Rate + 6.383%)		9.750	%		6/23/27		730,000		25,550	*^(a)(b)(c)(d)
Credit Suisse Group AG, Senior Notes (4.194%to 4/1/30 then SOFR + 3.730%)		4.194	%		4/1/31		400,000		352,556	^(a)(c)
Credit Suisse USA Inc., Senior Notes		7.125	%		7/15/32		70,000		77,282
Goldman Sachs Group Inc., Senior Notes		5.700	%		11/1/24		600,000		601,685
Goldman Sachs Group Inc., Senior Notes		6.250	%		2/1/41		2,550,000		2,727,551
Goldman Sachs Group Inc., Senior Notes (2.650% to 10/21/31 then SOFR + 1.264%)		2.650	%		10/21/32		630,000		516,438	^(c)
Goldman Sachs Group Inc., Senior Notes (3.615% to 3/15/27 then SOFR + 1.846%)		3.615	%		3/15/28		1,670,000		1,577,262	^(c)
Goldman Sachs Group Inc., Subordinated Notes		5.150	%		5/22/45		70,000		64,691
Intercontinental Exchange Inc., Senior Notes		4.950	%		6/15/52		390,000		372,120
Intercontinental Exchange Inc., Senior Notes		5.200	%		6/15/62		400,000		399,640
KKR Group Finance Co. III LLC, Senior Notes		5.125	%		6/1/44		1,300,000		1,130,632	^(a)
KKR Group Finance Co. VI LLC, Senior Notes		3.750	%		7/1/29		110,000		101,072	^(a)
KKR Group Finance Co. X LLC, Senior Notes		3.250	%		12/15/51		160,000		101,646	^(a)
Morgan Stanley, Senior Notes		6.375	%		7/24/42		140,000		154,564
Morgan Stanley, Senior Notes (1.928% to 4/28/31 then SOFR + 1.020%)		1.928	%		4/28/32		900,000		703,406	^(c)
Morgan Stanley, Subordinated Notes		4.350	%		9/8/26		500,000		487,933
Morgan Stanley, Subordinated Notes (5.297%to 4/20/32 then SOFR + 2.620%)		5.297	%		4/20/37		190,000		181,085	^(c)
Morgan Stanley, Subordinated Notes (5.948%to 1/19/33 then 5 year Treasury ConstantMaturity Rate + 2.430%)		5.948	%		1/19/38		160,000		158,181	^(c)
Raymond James Financial Inc., Senior Notes		4.650	%		4/1/30		120,000		117,254
Raymond James Financial Inc., Senior Notes		4.950	%		7/15/46		150,000		133,490
S&P Global Inc., Senior Notes		3.250	%		12/1/49		110,000		81,084
UBS Group AG, Junior Subordinated Notes (7.000% to 1/31/24 then USD 5 year ICE Swap Rate +4.344%)		7.000	%		1/31/24		920,000		880,900	^(a)(b)(c)
Total Capital Markets									12,943,020

See Notes to FinancialStatements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					11

Schedule of investments(unaudited) (contd)

May 31, 2023

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Consumer Finance 0.4%
Capital One Financial Corp., Senior Notes (5.817% to 2/1/33 then SOFR + 2.600%)		5.817	%		2/1/34		240,000	$	233,275	^(c)
Navient Corp., Senior Notes		6.125	%		3/25/24		480,000		470,961
Total Consumer Finance									704,236
Financial Services 1.8%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust, Senior Notes		3.850	%		10/29/41		530,000		398,381
Berkshire Hathaway Energy Co., Senior Notes		6.125	%		4/1/36		1,000,000		1,082,690
Carlyle Finance LLC, Senior Notes		5.650	%		9/15/48		170,000		150,987	^(a)
Carlyle Finance Subsidiary LLC, Senior Notes		3.500	%		9/19/29		230,000		204,856	^(a)
Carlyle Holdings II Finance LLC, Senior Notes		5.625	%		3/30/43		360,000		318,453	^(a)
Everest Reinsurance Holdings Inc., Senior Notes		3.500	%		10/15/50		220,000		154,111
ILFC E-Capital Trust I, Ltd. GTD ((Highest of 3 mo. USD LIBOR, 10 year Treasury ConstantMaturity Rate and 30 year Treasury Constant Maturity Rate) + 1.550%)		6.548	%		12/21/65		800,000		527,000	^(a)(c)
ILFC E-Capital Trust II, Ltd. GTD ((Highest of 3 mo. USD LIBOR, 10 year Treasury ConstantMaturity Rate and 30 year Treasury Constant Maturity Rate) + 1.800%)		6.798	%		12/21/65		100,000		67,750	^(a)(c)
Rocket Mortgage LLC/Rocket Mortgage Co-Issuer Inc., Senior Notes		2.875	%		10/15/26		230,000		201,248	^(a)
Rocket Mortgage LLC/Rocket Mortgage Co-Issuer Inc., Senior Notes		4.000	%		10/15/33		220,000		165,936	^(a)
Total Financial Services									3,271,412
Insurance 3.9%
Allianz SE, Junior Subordinated Notes (3.500%to 4/30/26 then 5 year Treasury ConstantMaturity Rate + 2.973%)		3.500	%		11/17/25		200,000		162,547	^(a)(b)(c)
American International Group Inc., Senior Notes		4.750	%		4/1/48		80,000		69,914
Americo Life Inc., Senior Notes		3.450	%		4/15/31		120,000		93,039	^(a)
Fidelity& Guaranty Life Holdings Inc., Senior Notes		5.500	%		5/1/25		360,000		354,460	^(a)
Liberty Mutual Insurance Co., Subordinated Notes		7.875	%		10/15/26		840,000		878,011	^(a)
Marsh& McLennan Cos. Inc., Senior Notes		2.900	%		12/15/51		170,000		112,152
Massachusetts Mutual Life Insurance Co., Subordinated Notes		3.375	%		4/15/50		130,000		92,403	^(a)

See Notes to FinancialStatements.


12				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Insurance continued
Massachusetts Mutual Life Insurance Co., Subordinated Notes		4.900	%		4/1/77		420,000	$	358,237	^(a)
MetLife Inc., Junior Subordinated Notes		6.400	%		12/15/36		1,000,000		986,743
MetLife Inc., Junior Subordinated Notes		9.250	%		4/8/38		159,000		186,645	^(a)
Nationwide Mutual Insurance Co., Subordinated Notes		9.375	%		8/15/39		520,000		672,598	^(a)
New York Life Insurance Co., Subordinated Notes		4.450	%		5/15/69		140,000		117,333	^(a)
Northwestern Mutual Life Insurance Co., Subordinated Notes		3.625	%		9/30/59		180,000		128,836	^(a)
Prudential Financial Inc., Junior Subordinated Notes (6.750% to 3/1/33 then 5 yearTreasury Constant Maturity Rate + 2.848%)		6.750	%		3/1/53		270,000		270,405	^(c)
RenaissanceRe Holdings Ltd., Senior Notes		5.750	%		6/5/33		300,000		301,026	^(e)
Teachers Insurance& Annuity Association of America, Subordinated Notes		6.850	%		12/16/39		1,050,000		1,171,557	^(a)
Teachers Insurance& Annuity Association of America, Subordinated Notes		4.900	%		9/15/44		660,000		601,496	^(a)
Teachers Insurance& Annuity Association of America, Subordinated Notes		3.300	%		5/15/50		330,000		228,679	^(a)
Travelers Cos. Inc., Senior Notes		6.250	%		6/15/37		400,000		445,420
Total Insurance									7,231,501
Mortgage Real Estate InvestmentTrusts (REITs) 0.4%
Blackstone Holdings Finance Co. LLC, Senior Notes		6.200	%		4/22/33		700,000		721,876	^(a)
Total Financials									58,991,921
Health Care 12.1%
Biotechnology 2.0%
AbbVie Inc., Senior Notes		3.200	%		11/21/29		370,000		335,993
AbbVie Inc., Senior Notes		4.050	%		11/21/39		1,160,000		995,618
Amgen Inc., Senior Notes		5.250	%		3/2/33		1,160,000		1,164,598
Amgen Inc., Senior Notes		5.650	%		3/2/53		460,000		460,500
Amgen Inc., Senior Notes		5.750	%		3/2/63		160,000		159,194
Gilead Sciences Inc., Senior Notes		5.650	%		12/1/41		100,000		104,430
Gilead Sciences Inc., Senior Notes		4.500	%		2/1/45		500,000		452,852
Gilead Sciences Inc., Senior Notes		4.750	%		3/1/46		100,000		93,628
Total Biotechnology									3,766,813
Health Care Equipment& Supplies 0.8%
Abbott Laboratories, Senior Notes		4.900	%		11/30/46		200,000		199,992

See Notes to FinancialStatements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					13

Schedule of investments(unaudited) (contd)

May 31, 2023

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Health Care Equipment& Supplies continued
Becton Dickinson& Co., Senior Notes		4.685	%		12/15/44		910,000	$	821,714
Becton Dickinson& Co., Senior Notes		4.669	%		6/6/47		450,000		405,687
Total Health Care Equipment&Supplies									1,427,393
Health Care Providers& Services 7.0%
Centene Corp., Senior Notes		4.250	%		12/15/27		160,000		150,509
Centene Corp., Senior Notes		4.625	%		12/15/29		560,000		519,848
Centene Corp., Senior Notes		3.375	%		2/15/30		790,000		681,881
Centene Corp., Senior Notes		3.000	%		10/15/30		120,000		100,506
Cigna Group, Senior Notes		4.125	%		11/15/25		540,000		528,992
Cigna Group, Senior Notes		4.800	%		8/15/38		540,000		507,739
Cigna Group, Senior Notes		3.200	%		3/15/40		220,000		168,132
CommonSpirit Health, Secured Notes		4.350	%		11/1/42		60,000		51,225
CVS Health Corp., Senior Notes		4.100	%		3/25/25		1,460,000		1,442,427
CVS Health Corp., Senior Notes		4.300	%		3/25/28		1,610,000		1,569,709
CVS Health Corp., Senior Notes		4.780	%		3/25/38		2,060,000		1,906,633
CVS Health Corp., Senior Notes		5.125	%		7/20/45		540,000		492,445
CVS Health Corp., Senior Notes		5.050	%		3/25/48		930,000		840,796
Dartmouth-Hitchco*ck Health, Secured Bonds		4.178	%		8/1/48		150,000		119,136
Elevance Health Inc., Senior Notes		5.350	%		10/15/25		500,000		503,817
Elevance Health Inc., Senior Notes		4.375	%		12/1/47		230,000		198,409
HCA Inc., Senior Notes		4.125	%		6/15/29		340,000		315,815
HCA Inc., Senior Notes		5.125	%		6/15/39		170,000		155,727
HCA Inc., Senior Notes		5.500	%		6/15/47		350,000		320,768
HCA Inc., Senior Notes		5.250	%		6/15/49		530,000		468,076
Humana Inc., Senior Notes		4.800	%		3/15/47		360,000		319,351
Inova Health System Foundation, Senior Notes		4.068	%		5/15/52		140,000		118,850
Kaiser Foundation Hospitals, Senior Notes		3.002	%		6/1/51		120,000		83,324
Orlando Health Obligated Group, Senior Notes		4.089	%		10/1/48		270,000		215,079
UnitedHealth Group Inc., Senior Notes		3.700	%		12/15/25		250,000		244,147
UnitedHealth Group Inc., Senior Notes		3.850	%		6/15/28		540,000		524,224
UnitedHealth Group Inc., Senior Notes		3.500	%		8/15/39		220,000		183,456
UnitedHealth Group Inc., Senior Notes		4.750	%		7/15/45		220,000		207,611
Total Health Care Providers&Services									12,938,632
Pharmaceuticals 2.3%
Bausch Health Cos. Inc., Senior Notes		5.000	%		1/30/28		130,000		57,639	^(a)
Pfizer Inc., Senior Notes		7.200	%		3/15/39		560,000		696,338
Pfizer Investment Enterprises Pte Ltd., Senior Notes		4.750	%		5/19/33		620,000		622,782

See Notes to FinancialStatements.


14				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Pharmaceuticals continued
Pfizer Investment Enterprises Pte Ltd., Senior Notes		5.110	%		5/19/43		620,000	$	616,535
Pfizer Investment Enterprises Pte Ltd., Senior Notes		5.300	%		5/19/53		470,000		484,217
Pfizer Investment Enterprises Pte Ltd., Senior Notes		5.340	%		5/19/63		90,000		90,193
Teva Pharmaceutical Finance Netherlands III BV, Senior Notes		7.125	%		1/31/25		200,000		203,386
Teva Pharmaceutical Finance Netherlands III BV, Senior Notes		8.125	%		9/15/31		320,000		332,668
Wyeth LLC, Senior Notes		5.950	%		4/1/37		1,100,000		1,210,586
Zoetis Inc., Senior Notes		4.700	%		2/1/43		40,000		36,700
Total Pharmaceuticals									4,351,044
Total Health Care									22,483,882
Industrials 8.4%
Aerospace& Defense 3.3%
Avolon Holdings Funding Ltd., Senior Notes		5.125	%		10/1/23		820,000		816,482	^(a)
Avolon Holdings Funding Ltd., Senior Notes		4.250	%		4/15/26		640,000		592,922	^(a)
Boeing Co., Senior Notes		3.100	%		5/1/26		1,740,000		1,639,890
Boeing Co., Senior Notes		3.250	%		2/1/28		580,000		534,817
Boeing Co., Senior Notes		5.705	%		5/1/40		330,000		325,404
Boeing Co., Senior Notes		5.805	%		5/1/50		220,000		215,625
Hexcel Corp., Senior Notes		4.200	%		2/15/27		1,000,000		948,818
Huntington Ingalls Industries Inc., Senior Notes		3.483	%		12/1/27		320,000		296,063
L3Harris Technologies Inc., Senior Notes		4.854	%		4/27/35		430,000		413,638
Lockheed Martin Corp., Senior Notes		4.500	%		5/15/36		50,000		48,846
Lockheed Martin Corp., Senior Notes		4.700	%		5/15/46		200,000		192,453
Raytheon Technologies Corp., Senior Notes		4.625	%		11/16/48		180,000		164,541
Total Aerospace&Defense									6,189,499
Air Freight& Logistics 0.4%
United Parcel Service Inc., Senior Notes		6.200	%		1/15/38		700,000		783,904
Building Products 0.1%
Carrier Global Corp., Senior Notes		3.577	%		4/5/50		160,000		115,113
Commercial Services& Supplies 0.1%
California Institute of Technology, Senior Notes		3.650	%		9/1/2119		180,000		122,780

See Notes to FinancialStatements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					15

Schedule of investments(unaudited) (contd)

May 31, 2023

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Ground Transportation 0.2%
Union Pacific Corp., Senior Notes		4.375	%		11/15/65		530,000	$	416,584
Union Pacific Corp., Senior Notes		3.750	%		2/5/70		30,000		22,492
Total GroundTransportation									439,076
Industrial Conglomerates 0.4%
General Electric Co., Senior Notes		6.875	%		1/10/39		143,000		168,249
Honeywell International Inc., Senior Notes		5.000	%		2/15/33		540,000		556,267
Total IndustrialConglomerates									724,516
Machinery 0.2%
Caterpillar Inc., Senior Notes		4.750	%		5/15/64		360,000		341,281
Passenger Airlines 1.5%
American Airlines Inc./AAdvantage Loyalty IP Ltd., Senior Secured Notes		5.500	%		4/20/26		170,000		166,993	^(a)
American Airlines Inc./AAdvantage Loyalty IP Ltd., Senior Secured Notes		5.750	%		4/20/29		170,000		163,049	^(a)
Delta Air Lines Inc., Senior Notes		2.900	%		10/28/24		840,000		811,233
Delta Air Lines Inc., Senior Notes		3.750	%		10/28/29		230,000		205,247
Delta Air Lines Inc., Senior Secured Notes		7.000	%		5/1/25		420,000		431,694	^(a)
Delta Air Lines Inc./SkyMiles IP Ltd., Senior Secured Notes		4.500	%		10/20/25		326,000		319,849	^(a)
Delta Air Lines Inc./SkyMiles IP Ltd., Senior Secured Notes		4.750	%		10/20/28		210,000		202,977	^(a)
Southwest Airlines Co., Senior Notes		5.125	%		6/15/27		290,000		288,825
United Airlines Pass-Through Trust		4.875	%		1/15/26		219,200		209,406
Total Passenger Airlines									2,799,273
Professional Services 0.4%
Equifax Inc., Senior Notes		2.350	%		9/15/31		970,000		774,441
Trading Companies& Distributors 1.8%
Air Lease Corp., Senior Notes		1.875	%		8/15/26		1,000,000		884,117
Air Lease Corp., Senior Notes		5.850	%		12/15/27		480,000		480,066
Air Lease Corp., Senior Notes		4.625	%		10/1/28		500,000		469,864
Aircastle Ltd., Senior Notes		5.250	%		8/11/25		1,000,000		971,720	^(a)
Aviation Capital Group LLC, Senior Notes		5.500	%		12/15/24		250,000		245,308	^(a)
Aviation Capital Group LLC, Senior Notes		4.125	%		8/1/25		340,000		320,227	^(a)
Total Trading Companies&Distributors									3,371,302
Total Industrials									15,661,185
Information Technology 3.7%
Electronic Equipment, Instruments&Components 0.3%
TD SYNNEX Corp., Senior Notes		1.250	%		8/9/24		600,000		566,090

See Notes to FinancialStatements.


16				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
IT Services 0.3%
International Business Machines Corp., Senior Notes		3.500	%		5/15/29		200,000	$	186,997
Kyndryl Holdings Inc., Senior Notes		4.100	%		10/15/41		450,000		289,534
Total IT Services									476,531
Semiconductors& SemiconductorEquipment 1.7%
Broadcom Inc., Senior Notes		4.150	%		11/15/30		178,000		163,893
Broadcom Inc., Senior Notes		4.300	%		11/15/32		580,000		527,671
Broadcom Inc., Senior Notes		3.187	%		11/15/36		22,000		16,477	^(a)
Broadcom Inc., Senior Notes		4.926	%		5/15/37		239,000		215,137	^(a)
Foundry JV Holdco LLC, Senior Secured Notes		5.875	%		1/25/34		470,000		464,805	^(a)
Intel Corp., Senior Notes		4.900	%		7/29/45		220,000		213,127
Intel Corp., Senior Notes		4.750	%		3/25/50		20,000		17,594
Intel Corp., Senior Notes		4.950	%		3/25/60		100,000		89,344
Intel Corp., Senior Notes		3.200	%		8/12/61		180,000		114,095
Micron Technology Inc., Senior Notes		2.703	%		4/15/32		210,000		165,783
Micron Technology Inc., Senior Notes		3.366	%		11/1/41		40,000		27,409
NVIDIA Corp., Senior Notes		3.500	%		4/1/40		100,000		84,752
NVIDIA Corp., Senior Notes		3.500	%		4/1/50		300,000		240,960
NVIDIA Corp., Senior Notes		3.700	%		4/1/60		120,000		94,818
QUALCOMM Inc., Senior Notes		4.300	%		5/20/47		70,000		62,049
Texas Instruments Inc., Senior Notes		4.600	%		2/15/28		380,000		385,024
Texas Instruments Inc., Senior Notes		3.875	%		3/15/39		430,000		379,872
Total Semiconductors&Semiconductor Equipment									3,262,810
Software 1.2%
Microsoft Corp., Senior Notes		4.250	%		2/6/47		1,520,000		1,474,779
Oracle Corp., Senior Notes		3.950	%		3/25/51		490,000		359,636
Oracle Corp., Senior Notes		4.100	%		3/25/61		580,000		413,636
Total Software									2,248,051
Technology Hardware, Storage&Peripherals 0.2%
Dell International LLC/EMC Corp., Senior Notes		8.100	%		7/15/36		200,000		231,674
Dell International LLC/EMC Corp., Senior Notes		8.350	%		7/15/46		60,000		70,953
Total Technology Hardware,Storage& Peripherals									302,627
Total Information Technology									6,856,109
Materials 1.5%
Chemicals 0.4%
Celanese US Holdings LLC, Senior Notes		5.900	%		7/5/24		480,000		479,581

See Notes to FinancialStatements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					17

Schedule of investments(unaudited) (contd)

May 31, 2023

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount		Value
Chemicals continued
Ecolab Inc., Senior Notes		4.800	%		3/24/30		130,000	$	131,315
OCP SA, Senior Notes		3.750	%		6/23/31		200,000		164,647	^(a)
Total Chemicals									775,543
Metals& Mining 1.1%
ArcelorMittal SA, Senior Notes		6.550	%		11/29/27		240,000		248,806
First Quantum Minerals Ltd., Senior Notes		6.875	%		10/15/27		400,000		381,440	^(a)
Freeport-McMoRan Inc., Senior Notes		5.450	%		3/15/43		330,000		299,566
Glencore Funding LLC, Senior Notes		4.000	%		3/27/27		590,000		563,943	^(a)
Yamana Gold Inc., Senior Notes		4.625	%		12/15/27		550,000		523,760
Total Metals&Mining									2,017,515
Total Materials									2,793,058
Real Estate 1.5%
Diversified REITs 0.5%
Vornado Realty LP, Senior Notes		3.500	%		1/15/25		1,000,000		926,256
Health Care REITs 0.6%
Diversified Healthcare Trust, Senior Notes		4.750	%		5/1/24		190,000		173,563
Ventas Realty LP, Senior Notes		4.400	%		1/15/29		540,000		509,713
Welltower OP LLC, Senior Notes		4.125	%		3/15/29		510,000		474,782
Total Health Care REITs									1,158,058
Residential REITs 0.2%
Invitation Homes Operating Partnership LP, Senior Notes		4.150	%		4/15/32		470,000		422,373
Retail REITs 0.1%
WEA Finance LLC/Westfield UK& Europe Finance PLC, Senior Notes		3.750	%		9/17/24		300,000		283,428	^(a)
Specialized REITs 0.1%
Extra Space Storage LP, Senior Notes		3.900	%		4/1/29		110,000		101,537
Total Real Estate									2,891,652
Utilities 4.3%
Electric Utilities 4.3%
CenterPoint Energy Houston Electric LLC, Senior Secured Bonds		4.500	%		4/1/44		530,000		476,193
Comision Federal de Electricidad, Senior Notes		4.677	%		2/9/51		200,000		133,990	^(a)
Commonwealth Edison Co., First Mortgage Bonds		6.450	%		1/15/38		600,000		672,985
Edison International, Junior Subordinated Notes (5.000% to 3/15/27 then 5 year TreasuryConstant Maturity Rate + 3.901%)		5.000	%		12/15/26		160,000		137,331	^(b)(c)

See Notes to FinancialStatements.


18				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)


Security	Rate			Maturity Date		Face Amount			Value
Electric Utilities continued
Edison International, Junior Subordinated Notes (5.375% to 3/15/26 then 5 year TreasuryConstant Maturity Rate + 4.698%)		5.375	%		3/15/26		230,000		$	201,917	^(b)(c)
Enel Finance International NV, Senior Notes		6.800	%		10/14/25		200,000			206,131	^(a)
Exelon Corp., Senior Notes		4.050	%		4/15/30		190,000			178,339
FirstEnergy Corp., Senior Notes		4.150	%		7/15/27		480,000			459,897
FirstEnergy Corp., Senior Notes		7.375	%		11/15/31		3,040,000			3,521,536
Jersey Central Power& Light Co., Senior Notes		4.300	%		1/15/26		170,000			166,152	^(a)
MidAmerican Energy Co., First Mortgage Bonds		3.650	%		4/15/29		240,000			228,322
Ohio Edison Co., Senior Notes		5.500	%		1/15/33		140,000			142,343	^(a)
Pacific Gas and Electric Co., First Mortgage Bonds		2.500	%		2/1/31		130,000			102,567
Pacific Gas and Electric Co., First Mortgage Bonds		3.300	%		8/1/40		30,000			20,190
Pacific Gas and Electric Co., First Mortgage Bonds		4.950	%		7/1/50		310,000			241,770
Southern California Edison Co., First Mortgage Bonds		4.125	%		3/1/48		480,000			386,915
Virginia Electric& Power Co., Senior Notes		8.875	%		11/15/38		500,000			670,968
Total Utilities										7,947,546
Total Corporate Bonds& Notes (Cost $190,236,586)										176,784,431
Sovereign Bonds 0.9%
Argentina 0.4%
Argentine Republic Government International Bond, Senior Notes		1.000	%		7/9/29		11,447			2,946
Argentine Republic Government International Bond, Senior Notes, Step bond (1.500% to7/9/23 then 3.625%)		1.500	%		7/9/35		182,200			42,751
Provincia de Buenos Aires, Senior Notes, Step bond (5.250% to 9/1/23, 6.375% to 9/1/24then 6.625%)		5.250	%		9/1/37		2,141,885			687,870	^(a)
Total Argentina										733,567
Mexico 0.3%
Mexican Bonos, Senior Notes		8.500	%		11/18/38		8,780,000	^MXN		476,068
Qatar 0.2%
Qatar Government International Bond, Senior Notes		4.817	%		3/14/49		410,000			391,314	^(a)
Total Sovereign Bonds (Cost $2,010,943)										1,600,949

See Notes to FinancialStatements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					19

Schedule of investments(unaudited) (contd)

May 31, 2023

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)

Security

Rate

Maturity
Date

Face
Amount

Value

Municipal Bonds 0.8%

California 0.4%

Morongo Band of Mission Indians, CA, Revenue, Tribal Economic Development,SeriesA

7.000

10/1/39

500,000

534,144

^(a)

Regents of the University of California Medical Center Pooled Revenue, Series Q

4.563

5/15/53

160,000

146,262

Total California

680,406

Florida 0.1%

Sumter Landing, FL, Community Development District Recreational Revenue, Taxable CommunityDevelopment District

4.172

10/1/47

260,000

232,831

Illinois 0.3%

Illinois State, GO, Taxable, Build America Bonds, Series 2010-3

6.725

4/1/35

489,231

517,446

Total Municipal Bonds (Cost $1,460,056)

1,430,683

U.S. Government& Agency Obligations 0.7%

U.S. Government Obligations 0.7%

U.S. Treasury Bonds (Cost $1,270,265)

3.625

2/15/53

1,290,000

1,239,408

Senior Loans 0.5%

Consumer Discretionary 0.2%

Specialty Retail 0.2%

Great Outdoors Group LLC, Term Loan B2 (1 mo. USD LIBOR + 3.750%)

8.904

3/6/28

351,940

342,526

^(c)(f)(g)

Health Care 0.2%

Biotechnology 0.2%

Horizon Therapeutics USA Inc., Incremental Term Loan B2 (1 mo. USD LIBOR +1.750%)

6.938

3/15/28

333,200

332,529

^(c)(f)(g)

Industrials 0.1%

Passenger Airlines 0.1%

Delta Air Lines Inc., Initial Term Loan (3 mo. Term SOFR + 3.750%)

8.798

10/20/27

252,000

261,310

^(c)(f)(g)

Materials 0.0%

Paper& Forest Products 0.0%

Schweitzer-Mauduit International Inc., Term Loan B (1 mo. USD LIBOR + 3.750%)

8.938

4/20/28

88,425

84,943

^(c)(f)(g)

Total Senior Loans (Cost $1,021,526)

1,021,308

See Notes to FinancialStatements.


20				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Percentages shown based on Fund net assets)

Security

Rate

Maturity

Date

Face

Amount

Value

Convertible Bonds& Notes 0.3%

Communication Services 0.3%

Media 0.3%

DISH Network Corp., Senior Notes (Cost $695,303)

2.375

3/15/24

730,000

632,362

Preferred Stocks 0.1%

Financials 0.1%

Insurance 0.1%

Delphi Financial Group Inc. (3 mo. USD LIBOR + 3.190%)
(Cost $233,032)

8.511

9,325

207,481

^(c)

Total Investments before Short-Term Investments(Cost $196,927,711)

182,916,622

Short-Term Investments 0.8%

Western Asset Premier Institutional Government Reserves, Premium Shares
(Cost $1,468,453)

5.033

1,468,453

1,468,453

^(h)(i)

Total Investments 99.0% (Cost $198,396,164)

184,385,075

Other Assets in Excess of Liabilities 1.0%

1,793,702

Total Net Assets 100.0%

186,178,777

See Notes to FinancialStatements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					21

Schedule of investments(unaudited) (contd)

May 31, 2023

Western Asset Investment Grade Defined Opportunity Trust Inc.

Face amount denominated in U.S. dollars, unless otherwise noted.

Represents less than 0.1%.

*	Non-income producing security.

^(a)

Security is exempt from registration under Rule 144A of the Securities Act of 1933. This security may be resold intransactions that are exempt from registration, normally to qualified institutional buyers. This security has been deemed liquid pursuant to guidelines approved by the Board of Directors.

^(b)	Security has no maturity date. The date shown represents the next call date.

^(c)

Variable rate security. Interest rate disclosed is as of the most recent information available. Certain variable ratesecurities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions. These securities do not indicate a reference rate and spread in their description above.

^(d)	The coupon payment on this security is currently in default as of May 31, 2023.

^(e)	Securities traded on a when-issued or delayed delivery basis.

^(f)	Interest rates disclosed represent the effective rates on senior loans. Ranges in interest rates are attributable tomultiple contracts under the same loan.

^(g)	Senior loans may be considered restricted in that the Fund ordinarily is contractually obligated to receive approval fromthe agent bank and/or borrower prior to the disposition of a senior loan.

^(h)	Rate shown is one-day yield as of the end of the reporting period.

⁽ⁱ⁾

In this instance, as defined in the Investment Company Act of 1940, an Affiliated Company represents Fundownership of at least 5% of the outstanding voting securities of an issuer, or a company which is under common ownership or control with the Fund. At May 31, 2023, the total market value of investments in Affiliated Companies was $1,468,453 and thecost was $1,468,453 (Note 7).


Abbreviation(s) used in thisschedule:

GO		General Obligation

GTD		Guaranteed

ICE		Intercontinental Exchange

JSC		Joint Stock Company

LIBOR		London Interbank Offered Rate

MXN		Mexican Peso

SOFR		Secured Overnight Financing Rate

USD		United States Dollar

At May31, 2023, the Fund had the following open futures contracts:


	Numberof Contracts		Expiration Date		Notional Amount		Market Value		Unrealized Appreciation (Depreciation)
Contracts to Buy:
U.S. Treasury 2-Year Notes		22		9/23	$	4,535,346	$	4,528,218	$	(7,128)
U.S. Treasury 5-Year Notes		94		9/23		10,321,879		10,253,344		(68,535)
U.S. Treasury 10-Year Notes		13		9/23		1,477,372		1,488,094		10,722
U.S. Treasury Ultra Long- Term Bonds		9		9/23		1,213,898		1,231,875		17,977
										(46,964)

See Notes to FinancialStatements.


22				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.


	Numberof Contracts		Expiration Date		Notional Amount		Market Value		Unrealized Appreciation (Depreciation)
Contracts to Sell:
U.S. Treasury Long-Term Bonds		27		9/23	$	3,420,555	$	3,465,281	$	(44,726)
U.S. Treasury Ultra 10-Year Notes		11		9/23		1,320,394		1,324,984		(4,590)
										(49,316)
Net unrealized depreciation on open futures contracts									$	(96,280)

At May31, 2023, the Fund had the following open forward foreign currency contracts:

Currency

Purchased

Currency

Sold

Counterparty

Settlement

Date

Unrealized

Depreciation

EUR

1,463,000

USD

1,604,827

BNP Paribas SA

7/18/23

(36,711)

JPY

125,721,910

USD

973,163

Goldman Sachs Group Inc.

7/18/23

(64,018)

Net unrealized depreciation on open forward foreign currency contracts

(100,729)


Abbreviation(s) used in thistable:

EUR		Euro

JPY		Japanese Yen

USD		United States Dollar

At May31, 2023, the Fund had the following open swap contracts:


CENTRALLY CLEARED CREDIT DEFAULT SWAPS ON CREDIT INDICES BUYPROTECTION¹
Reference Entity	Notional Amount²		Termination Date		Periodic Payments Madeby theFund	Market Value³		Upfront Premiums Paid (Received)		Unrealized Depreciation
Markit CDX.NA.HY.40 Index	$	1,940,000		6/20/28	5.000% quarterly	$	(20,693)	$	5,681	$	(26,374)
Markit CDX.NA.IG.40 Index		3,281,000		6/20/28	1.000%quarterly		(36,810)		(20,926)		(15,884)
Total	$	5,221,000				$	(57,503)	$	(15,245)	$	(42,258)

See Notes to FinancialStatements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					23

Schedule of investments(unaudited) (contd)

May 31, 2023

Western Asset Investment Grade Defined Opportunity Trust Inc.

If the Fund is a buyer of protection and a credit event occurs, as defined under the terms of that particular swapagreement, the Fund will either (i) receive from the seller of protection an amount equal to the notional amount of the swap and deliver the referenced obligation or the underlying securities comprising the referenced index or (ii) receive a netsettlement amount in the form of cash or securities equal to the notional amount of the swap less the recovery value of the referenced obligation or the underlying securities comprising the referenced index.

²	The maximum potential amount the Fund could be required to pay as a seller of credit protection or receive as a buyer ofcredit protection if a credit event occurs as defined under the terms of that particular swap agreement.

The quoted market prices and resulting values for credit default swap agreements on asset-backed securities and creditindices serve as an indicator of the current status of the payment/performance risk and represent the likelihood of an expected loss (or profit) for the credit derivative had the notional amount of the swap agreement been closed/sold as of theperiod end. Decreasing market values (sell protection) or increasing market values (buy protection) when compared to the notional amount of the swap, represent a deterioration of the referenced entitys credit soundness and a greater likelihoodor risk of default or other credit event occurring as defined under the terms of the agreement.

Percentage shown is an annual percentage rate.

See Notes to Financial Statements.


24				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Statement of assets and liabilities (unaudited)

May31, 2023



Assets:
Investments in unaffiliated securities, at value (Cost $196,927,711)	$	182,916,622
Investments in affiliated securities, at value (Cost $1,468,453)		1,468,453
Foreign currency, at value (Cost $76,051)		85,431
Interest receivable		2,419,696
Deposits with brokers for open futures contracts		217,501
Deposits with brokers for centrally cleared swap contracts		193,800
Receivable for securities sold		144,900
Receivable from brokers net variation margin on open futures contracts		27,965
Dividends receivable from affiliated investments		11,075
Receivable from brokers net variation margin on centrally cleared swapcontracts		5,430
Prepaid expenses		310
*Total Assets*		*187,491,183*

Liabilities:
Distributions payable		721,393
Payable for securities purchased		299,121
Unrealized depreciation on forward foreign currency contracts		100,729
Investment management fee payable		94,935
Directors fees payable		3,857
Accrued expenses		92,371
*Total Liabilities*		*1,312,406*
Total Net Assets	$	186,178,777

Net Assets:
Par value ($0.001 par value; 10,848,022 shares issued and outstanding; 100,000,000 sharesauthorized)	$	10,848
Paid-in capital in excess of par value		206,591,313
Total distributable earnings (loss)		(20,423,384)
Total Net Assets	$	186,178,777

Shares Outstanding		10,848,022

Net Asset Value		$17.16

See Notes to FinancialStatements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report				25

Statement of operations (unaudited)

For the Six Months Ended May31, 2023



Investment Income:
Interest	$	5,098,505
Dividends from unaffiliated investments		9,286
Dividends from affiliated investments		39,657
Less: Foreign taxes withheld		(8,950)
*Total InvestmentIncome*		*5,138,498*

Expenses:
Investment management fee (Note 2)		612,911
Directors fees		29,664
Audit and tax fees		27,117
Transfer agent fees		25,549
Legal fees		20,771
Fund accounting fees		13,585
Shareholder reports		7,142
Stock exchange listing fees		6,235
Custody fees		680
Insurance		620
Miscellaneous expenses		6,683
*Total Expenses*		*750,957*
Less: Fee waivers and/or expense reimbursem*nts (Note 2)		(47,901)
*Net Expenses*		*703,056*
Net Investment Income		4,435,442

Realized and Unrealized Gain (Loss) on Investments, Futures Contracts, Swap Contracts, Forward Foreign Currency Contracts and Foreign Currency Transactions (Notes 1, 3and 4):
Net Realized Gain (Loss) From:
Investment transactions in unaffiliated securities		(1,061,375)
Futures contracts		400,470
Swap contracts		(223,231)
Forward foreign currency contracts		80,610
Foreign currency transactions		263
*Net Realized Loss*		*(803,263)*
Change in Net Unrealized Appreciation (Depreciation) From:
Investments in unaffiliated securities		112,229
Futures contracts		(187,558)
Swap contracts		151,889
Forward foreign currency contracts		(158,934)
Foreign currencies		7,711
*Change in Net Unrealized Appreciation(Depreciation)*		*(74,663)*
Net Loss on Investments, Futures Contracts, Swap Contracts, Forward Foreign Currency Contracts and Foreign Currency Transactions		(877,926)
Increase in Net Assets From Operations	$	3,557,516

See Notes to FinancialStatements.


26				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Statements of changes in net assets


For the Six Months Ended May31, 2023 (unaudited) and the Year Ended November30, 2022	2023		2022

Operations:
Net investment income	$	4,435,442	$	8,426,977
Net realized loss		(803,263)		(846,043)
Change in net unrealized appreciation (depreciation)		(74,663)		(44,849,179)
*Increase (Decrease) in Net Assets FromOperations*		*3,557,516*		*(37,268,245)*

Distributions to Shareholders From (Note 1):
Total distributable earnings		(4,328,361)		(8,656,680)
*Decrease in Net Assets From Distributionsto Shareholders*		*(4,328,361)*		*(8,656,680)*

Fund Share Transactions:
Reinvestment of distributions (0 and 1,236 shares issued, respectively)				26,544
*Increase in Net Assets From Fund ShareTransactions*				*26,544*
*Decrease in NetAssets*		*(770,845)*		*(45,898,381)*

Net Assets:
Beginning of period		186,949,622		232,848,003
End of period	$	186,178,777	$	186,949,622

See Notes to FinancialStatements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report				27

Financial highlights


For a share of capital stock outstanding throughout each year ended November30, unless otherwise noted:
	2023^1,2			2022¹			2021¹			2020¹			2019¹			2018¹

Net asset value, beginning of period		$17.23			$21.47			$22.09			$21.12			$19.21			$21.00

Income (loss) from operations:
Net investment income		0.41			0.78			0.76			0.79			0.88			0.94
Net realized and unrealized gain (loss)		(0.08)			(4.22)			(0.58)			1.03			2.05			(1.71)
*Total income (loss) fromoperations*		*0.33*			*(3.44)*			*0.18*			*1.82*			*2.93*			*(0.77)*

Less distributions from:
Net investment income		(0.40)	³		(0.80)			(0.80)			(0.81)			(0.89)			(0.96)
Net realized gains											(0.04)			(0.13)			(0.06)
*Totaldistributions*		*(0.40)*			*(0.80)*			*(0.80)*			*(0.85)*			*(1.02)*			*(1.02)*

Net asset value, end of period		$17.16			$17.23			$21.47			$22.09			$21.12			$19.21

Market price, end of period		$16.33			$16.47			$22.03			$21.42			$21.24			$18.05
*Total return, based on NAV^4,5*		*1.91*	%		*(16.20)*	%		*0.83*	%		*8.96*	%		*15.59*	%		*(3.78)*	%
*Total return, based on Market Price⁶*		*1.53*	%		*(21.82)*	%		*6.70*	%		*5.06*	%		*23.70*	%		*(13.06)*	%

Net assets, end of period (millions)		$186			$187			$233			$239			$229			$208

Ratios to average net assets:
Gross expenses		0.80	%⁷		0.80	%		0.79	%		0.79	%		0.78	%		0.78	%
Net expenses⁸		0.75	^7,9		0.78	⁹		0.79	⁹		0.79	⁹		0.78			0.78
Net investment income		4.70	⁷		4.16			3.49			3.77			4.33			4.65

Portfolio turnover rate		6	%		18	%		19	%		41	%		56	%		46	%

¹	Per share amounts have been calculated using the average shares method.

²	For the six months ended May31, 2023 (unaudited).

³	The actual source of the Funds current fiscal year distributions may be from net investment income, return ofcapital or a combination of both. Shareholders will be informed of the tax characteristics of the distributions after the close of the fiscal year.

⁴

Performance figures may reflect compensating balance arrangements, fee waivers and/or expense reimbursem*nts. In theabsence of compensating balance arrangements, fee waivers and/or expense reimbursem*nts, the total return would have been lower. Past performance is no guarantee of future results. Total returns for periods of less than one year are not annualized.

⁵	The total return calculation assumes that distributions are reinvested at NAV. Past performance is no guarantee of futureresults. Total returns for periods of less than one year are not annualized.

⁶	The total return calculation assumes that distributions are reinvested in accordance with the Funds dividendreinvestment plan. Past performance is no guarantee of future results. Total returns for periods of less than one year are not annualized.

⁷	Annualized.

⁸	The manager has agreed to waive the Funds management fee to an extent sufficient to offset the net management feepayable in connection with any investment in an affiliated money market fund.

⁹	Reflects fee waivers and/or expense reimbursem*nts.

See Notes to Financial Statements.


28				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Notes to financial statements (unaudited)

1. Organization and significant accounting policies

Western Asset Investment Grade Defined Opportunity Trust Inc. (the Fund) was incorporated in Maryland on April24, 2009 and is registered as anon-diversified, limited-term, closed-end management investment company under the Investment Company Act of 1940, as amended (the 1940 Act). The Funds primary investment objective is to provide current income and then to liquidateand distribute substantially all of the Funds net assets to stockholders on or about December2, 2024. As a secondary investment objective, the Fund will seek capital appreciation. There can be no assurance the Fund will achieve itsinvestment objectives. The Fund seeks to achieve its investment objectives by investing, under normal market conditions, at least 80% of its net assets in investment grade corporate fixed income securities of varying maturities.

The Fund follows the accounting and reporting guidance in Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946,Financial Services Investment Companies (ASC 946). The following are significant accounting policies consistently followed by the Fund and are in conformity with U.S. generally accepted accounting principles(GAAP), including, but not limited to, ASC 946. Estimates and assumptions are required to be made regarding assets, liabilities and changes in net assets resulting from operations when financial statements are prepared. Changes in theeconomic environment, financial markets and any other parameters used in determining these estimates could cause actual results to differ. Subsequent events have been evaluated through the date the financial statements were issued.

(a) Investment valuation. The valuations for fixed income securities (whichmay include, but are not limited to, corporate, government, municipal, mortgage-backed, collateralized mortgage obligations and asset-backed securities) and certain derivative instruments are typically the prices supplied by independent third partypricing services, which may use market prices or broker/dealer quotations or a variety of valuation techniques and methodologies. The independent third party pricing services typically use inputs that are observable such as issuer details, interestrates, yield curves, prepayment speeds, credit risks/spreads, default rates and quoted prices for similar securities. Investments in open-end funds are valued at the closing net asset value per share of each fund on the day of valuation. Futurescontracts are valued daily at the settlement price established by the board of trade or exchange on which they are traded. Equity securities for which market quotations are available are valued at the last reported sales price or official closingprice on the primary market or exchange on which they trade. When the Fund holds securities or other assets that are denominated in a foreign currency, the Fund will normally use the currency exchange rates as of 4:00 p.m. (Eastern Time). Ifindependent third party pricing services are unable to supply prices for a portfolio investment, or if the prices supplied are deemed by the manager to be unreliable, the market price may be determined by the manager using quotations from one ormore broker/dealers or at the transaction price if the security has recently been purchased and no value has yet been obtained from a pricing service or pricing broker. When reliable prices are not readily available, such as when the value of asecurity has been significantly affected by events after the close of the exchange or market on which the security is principally traded, but before the Fund calculates its net


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					29

Notes to financial statements(unaudited) (contd)

asset value, the Fund values these securities as determined in accordance with procedures approvedby the Funds Board of Directors.

Pursuant to policies adopted by the Board of Directors, the Funds manager has been designated as the valuation designeeand is responsible for the oversight of the daily valuation process. The Funds manager is assisted by the Global Fund Valuation Committee (the Valuation Committee). The Valuation Committee is responsible for making fair valuedeterminations, evaluating the effectiveness of the Funds pricing policies, and reporting to the Funds manager and the Board of Directors. When determining the reliability of third party pricing information for investments owned by theFund, the Valuation Committee, among other things, conducts due diligence reviews of pricing vendors, monitors the daily change in prices and reviews transactions among market participants.

The Valuation Committee will consider pricing methodologies it deems relevant and appropriate when making fair value determinations. Examples of possible methodologiesinclude, but are not limited to, multiple of earnings; discount from market of a similar freely traded security; discounted cash-flow analysis; book value or a multiple thereof; risk premium/yield analysis; yield to maturity; and/or fundamentalinvestment analysis. The Valuation Committee will also consider factors it deems relevant and appropriate in light of the facts and circ*mstances. Examples of possible factors include, but are not limited to, the type of security; the issuersfinancial statements; the purchase price of the security; the discount from market value of unrestricted securities of the same class at the time of purchase; analysts research and observations from financial institutions; informationregarding any transactions or offers with respect to the security; the existence of merger proposals or tender offers affecting the security; the price and extent of public trading in similar securities of the issuer or comparable companies; and theexistence of a shelf registration for restricted securities.

For each portfolio security that has been fair valued pursuant to the policies adopted by the Board ofDirectors, the fair value price is compared against the last available and next available market quotations. The Valuation Committee reviews the results of such back testing monthly and fair valuation occurrences are reported to the Board ofDirectors quarterly.

The Fund uses valuation techniques to measure fair value that are consistent with the market approach and/or income approach, depending on thetype of security and the particular circ*mstance. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable securities. The income approach uses valuation techniques to discountestimated future cash flows to present value.


30				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

GAAP establishes a disclosure hierarchy thatcategorizes the inputs to valuation techniques used to value assets and liabilities at measurement date. These inputs are summarized in the three broad levels listed below:

Level 1 unadjusted quoted prices in active markets for identical investments

Level 2 other significant observable inputs (including quoted prices for similar investments, interest rates,prepayment speeds, credit risk, etc.)

Level 3 significant unobservable inputs (including the Funds own assumptions in determining the fair value ofinvestments)

The inputs or methodologies used to value securities are not necessarily an indication of the risk associated with investing in thosesecurities.

The following is a summary of the inputs used in valuing the Funds assets and liabilities carried at fair value:


ASSETS
Description	QuotedPrices (Level 1)		OtherSignificant ObservableInputs (Level 2)		Significant Unobservable Inputs (Level 3)	Total
Long-Term Investments:
Corporate Bonds& Notes			$	176,784,431		$	176,784,431
Sovereign Bonds				1,600,949			1,600,949
Municipal Bonds				1,430,683			1,430,683
U.S. Government& Agency Obligations				1,239,408			1,239,408
Senior Loans				1,021,308			1,021,308
Convertible Bonds& Notes				632,362			632,362
Preferred Stocks				207,481			207,481
Total Long-Term Investments				182,916,622			182,916,622
Short-Term Investments	$	1,468,453					1,468,453
Total Investments	$	1,468,453	$	182,916,622		$	184,385,075
Other Financial Instruments:
Futures Contracts	$	28,699				$	28,699
Total	$	1,497,152	$	182,916,622		$	184,413,774


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					31

Notes to financial statements(unaudited) (contd)


LIABILITIES
Description	QuotedPrices (Level1)		OtherSignificant ObservableInputs (Level2)		Significant Unobservable Inputs (Level3)	Total
Other Financial Instruments:
Futures Contracts	$	124,979				$	124,979
Forward Foreign Currency Contracts			$	100,729			100,729
Centrally Cleared Credit Default Swaps on Credit Indices BuyProtection				42,258			42,258
Total	$	124,979	$	142,987		$	267,966

See Schedule of Investments for additional detailed categorizations.

Reflects the unrealized appreciation (depreciation) of the instruments.

(b) Futures contracts. The Fund uses futures contracts generally to gainexposure to, or hedge against, changes in interest rates or gain exposure to, or hedge against, changes in certain asset classes. A futures contract represents a commitment for the future purchase or sale of an asset at a specified price on aspecified date.

Upon entering into a futures contract, the Fund is required to deposit cash or securities with a broker in an amount equal to a certainpercentage of the contract amount. This is known as the initial margin and subsequent payments (variation margin) are made or received by the Fund each day, depending on the daily fluctuation in thevalue of the contract. For certain futures, including foreign denominated futures, variation margin is not settled daily, but is recorded as a net variation margin payable or receivable. The daily changes in contract value are recorded as unrealizedappreciation or depreciation in the Statement of Operations and the Fund recognizes a realized gain or loss when the contract is closed.

Futures contracts involve,to varying degrees, risk of loss in excess of the amounts reflected in the financial statements. In addition, there is the risk that the Fund may not be able to enter into a closing transaction because of an illiquid secondary market.

(c) Forward foreign currency contracts. The Fund enters into a forwardforeign currency contract to hedge against, or manage exposure to, foreign issuers or markets. The Fund may also enter into a forward foreign currency contract to hedge against foreign currency exchange rate risk on its non-U.S. dollar denominatedsecurities or to facilitate settlement of a foreign currency denominated portfolio transaction. A forward foreign currency contract is an agreement between two parties to buy and sell a currency at a set price with delivery and settlement at afuture date. The contract is marked-to-market daily and the change in value is recorded by the Fund as an unrealized gain or loss. When a forward foreign currency contract is closed, through either delivery or offset by entering into another forwardforeign currency contract, the Fund recognizes a realized gain or loss equal to the difference between the value of the contract at the time it was opened and the value of the contract at the time it is closed.


32				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Forward foreign currency contracts involve elementsof market risk in excess of the amounts reflected on the Statement of Assets and Liabilities. The Fund bears the risk of an unfavorable change in the foreign exchange rate underlying the forward foreign currency contract. Risks may also arise uponentering into these contracts from the potential inability of the counterparties to meet the terms of their contracts.

(d) Swap agreements. The Fund invests in swaps for the purpose of managingits exposure to interest rate, credit or market risk, or for other purposes. The use of swaps involves risks that are different from those associated with other portfolio transactions. Swap agreements are privately negotiated in the over-the-countermarket and may be entered into as a bilateral contract (OTC Swaps) or centrally cleared (Centrally Cleared Swaps). Unlike Centrally Cleared Swaps, the Fund has credit exposure to the counterparties of OTC Swaps.

In a Centrally Cleared Swap, immediately following execution of the swap, the swap agreement is submitted to a clearinghouse or central counterparty (theCCP) and the CCP becomes the ultimate counterparty of the swap agreement. The Fund is required to interface with the CCP through a broker, acting in an agency capacity. All payments are settled with the CCP through the broker. Uponentering into a Centrally Cleared Swap, the Fund is required to deposit initial margin with the broker in the form of cash or securities.

Swap contracts aremarked-to-market daily and changes in value are recorded as unrealized appreciation (depreciation). The daily change in valuation of Centrally Cleared Swaps, if any, is recorded as a net receivable or payable for variation margin on the Statement ofAssets and Liabilities. Gains or losses are realized upon termination of the swap agreement. Collateral, in the form of restricted cash or securities, may be required to be held in segregated accounts with the Funds custodian in compliancewith the terms of the swap contracts. Securities posted as collateral for swap contracts are identified in the Schedule of Investments and restricted cash, if any, is identified on the Statement of Assets and Liabilities. Risks may exceed amountsrecorded in the Statement of Assets and Liabilities. These risks include changes in the returns of the underlying instruments, failure of the counterparties to perform under the contracts terms, and the possible lack of liquidity with respectto the swap agreements.

OTC Swap payments received or made at the beginning of the measurement period are reflected as a premium or deposit, respectively, on theStatement of Assets and Liabilities. These upfront payments are amortized over the life of the swap and are recognized as realized gain or loss in the Statement of Operations. Net periodic payments received or paid by the Fund are recognized as arealized gain or loss in the Statement of Operations.

The Funds maximum exposure in the event of a defined credit event on a credit default swap to sellprotection is the notional amount. As of May31, 2023, the Fund did not hold any credit default swaps to sell protection.

For average notional amounts of swapsheld during the six months ended May31, 2023, see Note 4.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					33

Notes to financial statements(unaudited) (contd)

Credit default swaps

The Fund enters into credit default swap (CDS) contracts for investment purposes, to manage its credit risk or to add leverage. CDS agreements involve oneparty making a stream of payments to another party in exchange for the right to receive a specified return in the event of a default by a third party, typically corporate or sovereign issuers, on a specified obligation, or in the event of awrite-down, principal shortfall, interest shortfall or default of all or part of the referenced entities comprising a credit index. The Fund may use a CDS to provide protection against defaults of the issuers (i.e., to reduce risk where the Fund hasexposure to an issuer) or to take an active long or short position with respect to the likelihood of a particular issuers default. As a seller of protection, the Fund generally receives an upfront payment or a stream of payments throughout theterm of the swap provided that there is no credit event. If the Fund is a seller of protection and a credit event occurs, as defined under the terms of that particular swap agreement, the maximum potential amount of future payments (undiscounted)that the Fund could be required to make under a CDS agreement would be an amount equal to the notional amount of the agreement. These amounts of potential payments will be partially offset by any recovery of values from the respective referencedobligations. As a seller of protection, the Fund effectively adds leverage to its portfolio because, in addition to its total net assets, the Fund is subject to investment exposure on the notional amount of the swap. As a buyer of protection, theFund generally receives an amount up to the notional value of the swap if a credit event occurs.

Implied spreads are the theoretical prices a lender receives forcredit default protection. When spreads rise, market perceived credit risk rises and when spreads fall, market perceived credit risk falls. The implied credit spread of a particular referenced entity reflects the cost of buying/selling protectionand may include upfront payments required to enter into the agreement. Wider credit spreads and decreasing market values, when compared to the notional amount of the swap, represent a deterioration of the referenced entitys credit soundnessand a greater likelihood or risk of default or other credit event occurring as defined under the terms of the agreement. Credit spreads utilized in determining the period end market value of CDS agreements on corporate or sovereign issues aredisclosed in the Schedule of Investments and serve as an indicator of the current status of the payment/ performance risk and represent the likelihood or risk of default for credit derivatives. For CDS agreements on asset-backed securities andcredit indices, the quoted market prices and resulting values, particularly in relation to the notional amount of the contract as well as the annual payment rate, serve as an indication of the current status of the payment/ performance risk.

The Funds maximum risk of loss from counterparty risk, as the protection buyer, is the fair value of the contract (this risk is mitigated by the posting ofcollateral by the counterparty to the Fund to cover the Funds exposure to the counterparty). As the protection seller, the Funds maximum risk is the notional amount of the contract. CDS are considered to have credit risk-relatedcontingent features since they require payment by the protection seller to the protection buyer upon the occurrence of a defined credit event.


34				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Entering into a CDS agreement involves, to varyingdegrees, elements of credit, market and documentation risk in excess of the related amounts recognized on the Statement of Assets and Liabilities. Such risks involve the possibility that there will be no liquid market for these agreements, that thecounterparty to the agreement may default on its obligation to perform or disagree as to the meaning of the contractual terms in the agreement, and that there will be unfavorable changes in net interest rates.

(e) Loan participations. The Fund may invest in loans arranged throughprivate negotiation between one or more financial institutions. The Funds investment in any such loan may be in the form of a participation in or an assignment of the loan. In connection with purchasing participations, the Fund generally willhave no right to enforce compliance by the borrower with the terms of the loan agreement related to the loan, or any rights of off-set against the borrower and the Fund may not benefit directly from any collateral supporting the loan in which it haspurchased the participation.

The Fund assumes the credit risk of the borrower, the lender that is selling the participation and any other personsinterpositioned between the Fund and the borrower. In the event of the insolvency of the lender selling the participation, the Fund may be treated as a general creditor of the lender and may not benefit from any off-set between the lender and theborrower.

(f) Securities traded on a when-issued and delayed delivery basis. The Fund may trade securities on a when-issued or delayed delivery basis. In when-issued and delayed delivery transactions, the securities are purchased or sold by the Fund with payment and delivery taking place in thefuture in order to secure what is considered to be an advantageous price and yield to the Fund at the time of entering into the transaction.

Purchasing suchsecurities involves risk of loss if the value of the securities declines prior to settlement. These securities are subject to market fluctuations and their current value is determined in the same manner as for other securities.

(g) Foreign currency translation. Investment securities and other assetsand liabilities denominated in foreign currencies are translated into U.S. dollar amounts based upon prevailing exchange rates on the date of valuation. Purchases and sales of investment securities and income and expense items denominated in foreigncurrencies are translated into U.S. dollar amounts based upon prevailing exchange rates on the respective dates of such transactions.

The Fund does notisolate that portion of the results of operations resulting from fluctuations in foreign exchange rates on investments from the fluctuations arising from changes in market prices of securities held. Such fluctuations are included with the netrealized and unrealized gain or loss on investments.

Net realized foreign exchange gains or losses arise from sales of foreign currencies, including gains andlosses on forward foreign currency contracts, currency gains or losses realized between the trade and settlement dates on securities transactions, and the


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					35

Notes to financial statements(unaudited) (contd)

difference between the amounts of dividends, interest, and foreign withholding taxes recorded onthe Funds books and the U.S. dollar equivalent of the amounts actually received or paid. Net unrealized foreign exchange gains and losses arise from changes in the values of assets and liabilities, other than investments in securities, on thedate of valuation, resulting from changes in exchange rates.

Foreign security and currency transactions may involve certain considerations and risks not typicallyassociated with those of U.S. dollar denominated transactions as a result of, among other factors, the possibility of lower levels of governmental supervision and regulation of foreign securities markets and the possibility of political or economicinstability.

(h) Credit and market risk. The Fund invests inhigh-yield instruments that are subject to certain credit and market risks. The yields of high-yield obligations reflect, among other things, perceived credit and market risks. The Funds investments in securities rated below investment gradetypically involve risks not associated with higher rated securities including, among others, greater risk related to timely and ultimate payment of interest and principal, greater market price volatility and less liquid secondary market trading.

(i) Foreign investment risks. The Funds investments inforeign securities may involve risks not present in domestic investments. Since securities may be denominated in foreign currencies, may require settlement in foreign currencies or may pay interest or dividends in foreign currencies, changes in therelationship of these foreign currencies to the U.S. dollar can significantly affect the value of the investments and earnings of the Fund. Foreign investments may also subject the Fund to foreign government exchange restrictions, expropriation,taxation or other political, social or economic developments, all of which affect the market and/or credit risk of the investments.

(j) Counterparty risk and credit-risk-related contingent features of derivative instruments. The Fund may invest in certain securities or engage in othertransactions where the Fund is exposed to counterparty credit risk in addition to broader market risks. The Fund may invest in securities of issuers, which may also be considered counterparties as trading partners in other transactions. This mayincrease the risk of loss in the event of default or bankruptcy by the counterparty or if the counterparty otherwise fails to meet its contractual obligations. The Funds subadviser attempts to mitigate counterparty risk by(i)periodically assessing the creditworthiness of its trading partners, (ii)monitoring and/or limiting the amount of its net exposure to each individual counterparty based on its assessment and (iii)requiring collateral from thecounterparty for certain transactions. Market events and changes in overall economic conditions may impact the assessment of such counterparty risk by the subadviser. In addition, declines in the values of underlying collateral received may exposethe Fund to increased risk of loss.

With exchange traded and centrally cleared derivatives, there is less counterparty risk to the Fund since the exchange orclearinghouse, as counterparty to such instruments, guarantees against a possible default. The clearinghouse stands between the buyer and the


36				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

seller of the contract; therefore, the credit riskis limited to failure of the clearinghouse. While offset rights may exist under applicable law, the Fund does not have a contractual right of offset against a clearing broker or clearinghouse in the event of a default of the clearing broker orclearinghouse.

The Fund has entered into master agreements, such as an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA MasterAgreement) or similar agreement, with certain of its derivative counterparties that govern over-the-counter (OTC) derivatives and provide for general obligations, representations, agreements, collateral posting terms, nettingprovisions in the event of default or termination and credit related contingent features. The credit related contingent features include, but are not limited to, a percentage decrease in the Funds net assets or net asset value per share over aspecified period of time. If these credit related contingent features were triggered, the derivatives counterparty could terminate the positions and demand payment or require additional collateral.

Under an ISDA Master Agreement, the Fund may, under certain circ*mstances, offset with the counterparty certain derivative financial instruments payables and/orreceivables with collateral held and/or posted and create one single net payment. However, absent an event of default by the counterparty or a termination of the agreement, the terms of the ISDA Master Agreements do not result in an offset ofreported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the Fund and the applicable counterparty. The enforceability of the right to offset may vary by jurisdiction.

Collateral requirements differ by type of derivative. Collateral or margin requirements are set by the broker or exchange clearinghouse for exchange traded derivativeswhile collateral terms are contract specific for OTC traded derivatives. Cash collateral that has been pledged to cover obligations of the Fund under derivative contracts, if any, will be reported separately in the Statement of Assets andLiabilities. Securities pledged as collateral, if any, for the same purpose are noted in the Schedule of Investments.

As of May31, 2023, the Fund held forwardforeign currency contracts with credit related contingent features which had a liability position of $100,729. If a contingent feature in the master agreements would have been triggered, the Fund would have been required to pay this amount to itsderivatives counterparties.

(k) Security transactions and investment income. Security transactions are accounted for on a trade date basis. Interest income (including interest income from payment-in-kind securities), adjusted for amortization of premium and accretion of discount, is recorded on theaccrual basis. Paydown gains and losses on mortgage- and asset-backed securities are recorded as adjustments to interest income. Dividend income is recorded on the ex-dividend date. Foreign dividend income is recorded on the ex-dividend date or assoon as practicable after the Fund determines the existence of a dividend declaration after exercising reasonable due diligence. The cost of investments sold is determined by use of the specific


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					37

Notes to financial statements(unaudited) (contd)

identification method. To the extent any issuer defaults or a credit event occurs that impacts theissuer, the Fund may halt any additional interest income accruals and consider the realizability of interest accrued up to the date of default or credit event.

(l) Distributions to shareholders. Distributions from net investment income of the Fund, if any, are declared quarterly and paid on a monthly basis. The actualsource of the Funds monthly distributions may be from net investment income, realized capital gains, return of capital or a combination of both. Distributions of net realized gains, if any, are declared at least annually. Distributions toshareholders of the Fund are recorded on the ex-dividend date and are determined in accordance with income tax regulations, which may differ from GAAP.

(m) Compensating balance arrangements. The Fund has an arrangement with its custodian bank whereby a portion of the custodians fees is paid indirectly bycredits earned on the Funds cash on deposit with the bank.

(n) Federal and other taxes. It is the Funds policy to comply with the federal income and excise tax requirements of the Internal Revenue Code of 1986 (the Code), as amended, applicable to regulated investment companies. Accordingly,the Fund intends to distribute its taxable income and net realized gains, if any, to shareholders in accordance with timing requirements imposed by the Code. Therefore, no federal or state income tax provision is required in the Fundsfinancial statements.

Management has analyzed the Funds tax positions taken on income tax returns for all open tax years and has concluded that as ofNovember30, 2022, no provision for income tax is required in the Funds financial statements. The Funds federal and state income and federal excise tax returns for tax years for which the applicable statutes of limitations have notexpired are subject to examination by the Internal Revenue Service and state departments of revenue.

Under the applicable foreign tax laws, a withholding tax may beimposed on interest, dividends and capital gains at various rates.

(o) Reclassification. GAAP requires that certain components of net assets be reclassified to reflect permanent differences between financial and tax reporting. These reclassifications have no effect on net assets or net asset value per share.

2. Investment management agreement and other transactions with affiliates

Legg Mason Partners Fund Advisor, LLC (LMPFA) is the Funds investment manager. Western Asset Management Company, LLC (Western Asset),Western Asset Management Company Pte. Ltd. (Western Asset Singapore), Western Asset Management Company Ltd (Western Asset Japan) and Western Asset Management Company Limited (Western Asset London) are theFunds subadvisers. LMPFA, Western Asset, Western Asset Singapore, Western Asset Japan and Western Asset London are indirect, wholly-owned subsidiaries of Franklin Resources, Inc. (Franklin Resources).


38				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

LMPFA provides administrative and certain oversightservices to the Fund. The Fund pays LMPFA an investment management fee, calculated daily and paid monthly, at an annual rate of 0.65% of the Funds average daily net assets.

LMPFA delegates to Western Asset the day-to-day portfolio management of the Fund. Western Asset Singapore, Western Asset Japan and Western Asset London provide certainsubadvisory services to the Fund relating to currency transactions and investments in non-U.S. dollar denominated debt securities. For its services, LMPFA pays Western Asset a fee monthly, at an annual rate equal to 70% of the net management fee itreceives from the Fund. In turn, Western Asset pays Western Asset Singapore, Western Asset Japan and Western Asset London a monthly subadvisory fee in an amount equal to 100% of the management fee paid to Western Asset on the assets that WesternAsset allocates to each such non-U.S. subadviser to manage.

The manager has agreed to waive the Funds management fee to an extent sufficient to offset the netmanagement fee payable in connection with any investment in an affiliated money market fund (the affiliated money market fund waiver).

EffectiveJune1, 2022, LMPFA implemented a voluntary investment management fee waiver of 0.05% that will continue until May31, 2024.

During the six months endedMay31, 2023, fees waived and/or expenses reimbursed amounted to $47,901, which included an affiliated money market fund waiver of $754.

All officers and oneDirector of the Fund are employees of Franklin Resources or its affiliates and do not receive compensation from the Fund.

3. Investments

During the six months ended May31, 2023, the aggregate cost of purchases and proceeds from sales of investments (excluding short-term investments)and U.S. Government& Agency Obligations were as follows:


	Investments		U.S.Government& AgencyObligations
Purchases	$	9,080,479	$	2,565,229
Sales		11,064,188		1,298,626

Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report 39


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					39

Notes to financial statements(unaudited) (contd)

At May31, 2023, the aggregate cost of investments and the aggregate gross unrealizedappreciation and depreciation of investments for federal income tax purposes were substantially as follows:


	Cost/Premiums Paid(Received)		Gross Unrealized Appreciation		Gross Unrealized Depreciation		Net Unrealized Depreciation
Securities	$	198,396,164	$	3,440,729	$	(17,451,818)	$	(14,011,089)
Futures contracts				28,699		(124,979)		(96,280)
Forward foreign currency contracts						(100,729)		(100,729)
Swap contracts		(15,245)				(42,258)		(42,258)

4. Derivative instruments and hedging activities

Below is a table, grouped by derivative type, that provides information about the fair value and the location of derivatives within the Statement of Assets andLiabilities at May31, 2023.


ASSET DERIVATIVES¹
	Interest RateRisk
Futures contracts²	$	28,699


LIABILITY DERIVATIVES¹
	InterestRate Risk		Foreign ExchangeRisk		Credit Risk		Total
Futures contracts²	$	124,979					$	124,979
Forward foreign currency contracts			$	100,729				100,729
Centrally cleared swap contracts³					$	42,258		42,258
Total	$	124,979	$	100,729	$	42,258	$	267,966

¹	Generally, the balance sheet location for asset derivatives is receivables/net unrealized appreciation and for liabilityderivatives is payables/net unrealized depreciation.

²	Includes cumulative unrealized appreciation (depreciation) of futures contracts as reported in the Schedule ofInvestments. Only net variation margin is reported within the receivables and/or payables on the Statement of Assets and Liabilities.

³	Includes cumulative unrealized appreciation (depreciation) of centrally cleared swap contracts as reported in the Scheduleof Investments. Only net variation margin is reported within the receivables and/or payables on the Statement of Assets and Liabilities.


40				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

The following tables provide information about theeffect of derivatives and hedging activities on the Funds Statement of Operations for the six months ended May31, 2023. The first table provides additional detail about the amounts and sources of gains (losses) realized on derivativesduring the period. The second table provides additional information about the change in net unrealized appreciation (depreciation) resulting from the Funds derivatives and hedging activities during the period.


AMOUNT OF NET REALIZED GAIN (LOSS) ON DERIVATIVES RECOGNIZED
	Interest RateRisk		Foreign ExchangeRisk		Credit Risk		Total
Futures contracts	$	400,470					$	400,470
Swap contracts					$	(223,231)		(223,231)
Forward foreign currency contracts			$	80,610				80,610
Total	$	400,470	$	80,610	$	(223,231)	$	257,849


CHANGE IN NET UNREALIZED APPRECIATION (DEPRECIATION) ON DERIVATIVES RECOGNIZED
	Interest Rate Risk		Foreign ExchangeRisk		Credit Risk		Total
Futures contracts	$	(187,558)					$	(187,558)
Swap contracts					$	151,889		151,889
Forward foreign currency contracts			$	(158,934)				(158,934)
Total	$	(187,558)	$	(158,934)	$	151,889	$	(194,603)

During the six months ended May31, 2023, the volume of derivative activity for the Fund was as follows:


	AverageMarket Value
Futures contracts (to buy)	$	18,993,685
Futures contracts (to sell)		4,278,743
Forward foreign currency contracts (to buy)		2,245,964

	AverageNotional Balance
Credit default swap contracts (buy protection)	$	7,280,857

The following table presents the Funds OTC derivative assets and liabilities by counterparty net of amounts available for offsetunder an ISDA Master Agreement and net of the related collateral pledged (received) by the Fund as of May31, 2023.


Counterparty	GrossAssets Subjectto Master Agreements	Gross Liabilities Subject to Master Agreements¹		NetAssets (Liabilities) Subjectto Master Agreements	Collateral Pledged (Received)	Net Amount²
BNP Paribas SA		$	(36,711)	$(36,711)		$	(36,711)
Goldman Sachs Group Inc.			(64,018)	(64,018)			(64,018)
Total		$	(100,729)	$(100,729)		$	(100,729)


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					41

Notes to financial statements(unaudited) (contd)

¹	Absent an event of default or early termination, derivative assets and liabilities are presented gross and not offset inthe Statement of Assets and Liabilities.

²	Represents the net amount receivable (payable) from (to) the counterparty in the event of default.

5. Distributions subsequent to May31, 2023

The following distributions have been declared by the Funds Board of Directors and are payable subsequent to the period end of this report:


Record Date	PayableDate		Amount
5/23/2023		6/1/2023	$	0.0665
6/23/2023		7/3/2023	$	0.0665
7/24/2023		8/1/2023	$	0.0665
8/24/2023		9/1/2023	$	0.0665

6. Stock repurchase program

On November16, 2015, the Fund announced that the Funds Board of Directors (the Board) had authorized the Fund to repurchase in the open market upto approximately 10% of the Funds outstanding common stock when the Funds shares are trading at a discount to net asset value. The Board has directed management of the Fund to repurchase shares of common stock at such times and in suchamounts as management reasonably believes may enhance stockholder value. The Fund is under no obligation to purchase shares at any specific discount levels or in any specific amounts. During the six months ended May31, 2023 and the year endedNovember30, 2022, the Fund did not repurchase any shares.

7. Transactions with affiliated company

As defined by the 1940 Act, an affiliated company is one in which the Fund owns 5% or more of the outstanding voting securities, or a company which is under commonownership or control with the Fund. The following company was considered an affiliated company for all or some portion of the six months ended May31, 2023. The following transactions were effected in such company for the six months endedMay31, 2023.


	Affiliate Valueat November30,		Purchased				Sold
	2022		Cost		Shares		Proceeds		Shares
Western Asset Premier Institutional Government Reserves, Premium Shares	$	838,034	$	14,257,423		14,257,423	$	13,627,004		13,627,004


42				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

(contd)

Realized

Gain(Loss)

Dividend
Income

NetIncrease
(Decrease)in
Unrealized
Appreciation
(Depreciation)

Affiliate

Valueat
May31,

2023

Western Asset Premier Institutional Government Reserves, Premium Shares

39,657

1,468,453

8. Deferred capital losses

As of November30, 2022, the Fund had deferred capital losses of $1,927,574, which have no expiration date, that will be available to offset future taxable capitalgains.

9. Recent accounting pronouncement

In March 2020, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No.2020-04, Reference Rate Reform (Topic 848) Facilitation of the Effects of Reference Rate Reform on Financial Reporting. In January 2021 and December 2022, the FASB issued ASU No.2021-01 and ASU No.2022-06, with further amendments to Topic 848. The amendments in the ASUsprovide optional temporary accounting recognition and financial reporting relief from the effect of certain types of contract modifications due to the planned discontinuation of the London Interbank Offered Rate (LIBOR) and other interbank-offeredbased reference rates as of the end of 2021 for certain LIBOR settings and 2023 for the remainder. The ASUs are effective for certain reference rate-related contract modifications that occur during the period March12, 2020 throughDecember31, 2024. Management has reviewed the requirements and believes the adoption of these ASUs will not have a material impact on the financial statements.

10. Other matter

The Funds investments,payment obligations, and financing terms may be based on floating rates, such as the London Interbank Offered Rate, or LIBOR, which was the offered rate for short-term Eurodollar deposits between major international banks. In 2017, theU.K. Financial Conduct Authority (FCA) announced its intention to cease compelling banks to provide the quotations needed to sustain LIBOR after 2021. In addition, global regulators have announced that, with limited exceptions, no newLIBOR-based contracts should be entered into after 2021. In connection with the global transition away from LIBOR led by regulators and market participants, LIBOR is no longer published on a representative basis. Alternative references rates havebeen established in most major currencies. In March 2022, the U.S. federal government enacted legislation to establish a process for replacing LIBOR in certain existing contracts that do not already provide for the use of a clearly defined orpracticable replacement benchmark rate as described in the legislation. Generally speaking, for contracts that do not contain a fallback provision as described in the legislation, a benchmark replacement recommended by the Federal Reserve Boardeffectively automatically replaced the USD LIBOR benchmark in the contract upon LIBORs cessation at the end of June 2023. The recommended benchmark replacement is based on


Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report					43

Notes to financial statements(unaudited) (contd)

the Secured Overnight Financing Rate (SOFR) published by the Federal Reserve Bank of New York,including certain spread adjustments and benchmark replacement conforming changes. Various industry groups are in the process of facilitating the transition away from LIBOR, but there remains uncertainty regarding the impact of the transition fromLIBOR on the Funds transactions and the financial markets generally.


44				Western Asset Investment Grade Defined Opportunity Trust Inc. 2023 Semi-Annual Report

Board approval of management and subadvisory agreements (unaudited)

Background

The Investment Company Act of 1940,as amended (the 1940 Act), requires that the Board of Directors (the Board) of Western Asset Investment Grade Defined Opportunity Trust Inc. (the Fund), including a majority of its members who are not consideredto be interested persons under the 1940 Act (the Independent Directors) voting separately, approve on an annual basis the continuation of the investment management agreement (the Management Agreement) between theFund and the Funds manager, Legg Mason Partners Fund Advisor, LLC (the Manager), and the sub-advisory agreements (individually, a Sub-Advisory Agreement, and collectively, the Sub-Advisory Agreements) withthe Managers affiliates, Western Asset Management Company, LLC (Western Asset), Western Asset Management Company Limited (Western Asset London), Western Asset Management Company Pte. Ltd. (Western AssetSingapore) and Western Asset Management Company Ltd (Western Asset Japan, and with Western Asset, Western Asset London and Western Asset Singapore, collectively, the Sub-Advisers), with respect to the Fund.

At an in-person meeting (the Contract Renewal Meeting) held on May9-10, 2023, the Board, including the Independent Directors, considered and approvedthe continuation of each of the Management Agreement and the Sub-Advisory Agreements for an additional one-year period. To assist in its consideration of the renewal of each of the Management Agreement and the Sub-Advisory Agreements, the Boardreceived and considered extensive information (together with the information provided at the Contract Renewal Meeting, the Contract Renewal Information) about the Manager and the Sub-Advisers, as well as the management and sub-advisoryarrangements for the Fund and the other closed-end funds in the same complex under the Boards purview (the Franklin Templeton/Legg Mason Closed-end Funds), certain portions of which are discussed below.

A presentation made by the Manager and the Sub-Advisers to the Board at the Contract Renewal Meeting in connection with the Boards evaluation of each of theManagement Agreement and the Sub-Advisory Agreements encompassed the Fund and other Franklin Templeton/Legg Mason Closed-end Funds. In addition to the Contract Renewal Information, the Board received performance and other information throughout theyear related to the respective services rendered by the Manager and the Sub-Advisers to the Fund. The Boards evaluation took into account the information received throughout the year and also reflected the knowledge and experience gained asmembers of the Boards of the Fund and other Franklin Templeton/Legg Mason Closed-end Funds with respect to the services provided to the Fund by the Manager and the Sub-Advisers. The information received and considered by the Board (including itsvarious committees) in conjunction with both the Contract Renewal Meeting and throughout the year was both written and oral. The


Western Asset Investment Grade Defined Opportunity Trust Inc.					45

Board approval of management and subadvisory agreements (unaudited) (contd)

contractual arrangements discussed below are the product of multiple years of review and negotiation and information received and considered by the Board during each ofthose years.

At a meeting held on April18, 2023, the Independent Directors, in preparation for the Contract Renewal Meeting, met in a private session withtheir independent legal counsel to review the Contract Renewal Information regarding the Franklin Templeton/Legg Mason Closed-end Funds, including the Fund, received to date. No representatives of the Manager or the Sub-Advisers participated in thismeeting. Following the April18, 2023 meeting, the Independent Directors submitted certain questions and requests for additional information to Fund management. The Independent Directors also met in private sessions with their independent legalcounsel to consider the Contract Renewal Information and Fund managements responses to the Independent Directors questions and requests for additional information in advance of and during the Contract Renewal Meeting. The discussionbelow reflects all of these reviews.

The Manager provides the Fund with investment advisory and administrative services pursuant to the Management Agreement and theSub-Advisers together provide the Fund with investment sub-advisory services pursuant to the Sub-Advisory Agreements. The discussion below covers both the advisory and administrative functions being rendered by the Manager, each such function beingencompassed by the Management Agreement, and the investment sub-advisory functions being rendered by the Sub-Advisers pursuant to the Sub-Advisory Agreements.

Board Approval of Management Agreement and Sub-Advisory Agreements

The Independent Directors were advised by separate independentlegal counsel throughout the process. Prior to voting, the Independent Directors received a memorandum discussing the legal standards for their consideration of the proposed continuation of the Management Agreement and the Sub-Advisory Agreements.The Independent Directors considered the Management Agreement and each Sub-Advisory Agreement separately during the course of their review. In doing so, they noted the respective roles of the Manager and the Sub-Advisers in providing services to theFund.

In approving the continuation of the Management Agreement and Sub-Advisory Agreements, the Board, including the Independent Directors, considered a variety offactors, including those factors discussed below. No single factor reviewed by the Board was identified by the Board as the principal factor in determining whether to approve the continuation of the Management Agreement and the Sub-AdvisoryAgreements. Each Director may have attributed different weight to the various factors in evaluating the Management Agreement and the Sub-Advisory Agreements.


46				Western Asset Investment Grade Defined Opportunity Trust Inc.

After considering all relevant factors andinformation, the Board, exercising its reasonable business judgment, determined that the continuation of the Management Agreement and Sub-Advisory Agreements were in the best interests of the Funds shareholders and approved the continuation ofeach such agreement for an additional one-year period.

Nature, Extent and Quality of the Services under the Management Agreement andSub-Advisory Agreements

The Board received and considered Contract Renewal Information regarding the nature, extent, and quality of services provided tothe Fund by the Manager and the Sub-Advisers under the Management Agreement and the Sub-Advisory Agreements, respectively, during the past year. The Board noted information received at regular meetings throughout the year related to the servicesprovided by the Manager in its management of the Funds affairs and the Managers role in coordinating the activities of the Sub-Advisers and the Funds other service providers. The Board observed that the scope of services providedby the Manager and the Sub-Advisers, and of the undertakings required of the Manager and Sub-Advisers in connection with those services, including maintaining and monitoring their respective compliance programs as well as the Funds complianceprograms had expanded over time as a result of regulatory, market and other developments. The Board also noted that on a regular basis it received and reviewed information from the Manager and the Sub-Advisers regarding the Funds compliancepolicies and procedures established pursuant to Rule 38a-1 under the 1940 Act. The Board also considered the risks borne by the Manager, the Sub-Advisers and their respective affiliates on behalf of the Fund, including entrepreneurial, operational,reputational, litigation and regulatory risks, as well as the Managers and the Sub-Advisers risk management processes.

The Board reviewed thequalifications, backgrounds, and responsibilities of the Managers senior personnel and the Sub-Advisers portfolio management teams primarily responsible for the day-to-day portfolio management of the Fund. The Board also considered,based on its knowledge of the Manager and its affiliates, the financial resources of Franklin Resources, Inc., the parent organization of the Manager and the Sub-Advisers. The Board recognized the importance of having a fund manager with significantresources.

The Board considered the division of responsibilities between the Manager and the Sub-Advisers under the Management Agreement and the Sub-AdvisoryAgreements, respectively, including the Managers coordination and oversight of the services provided to the Fund by the Sub-Advisers and other fund service providers and Western Assets coordination and oversight of the services providedto the Fund by Western Asset London, Western Asset Singapore and Western Asset Japan. The Management Agreement permits the Manager to delegate certain of its responsibilities, including its investment advisory duties thereunder, provided that theManager, in each case, will supervise the activities of the delegee.


Western Asset Investment Grade Defined Opportunity Trust Inc.					47

Board approval of management and subadvisory agreements (unaudited) (contd)

In reaching its determinations regarding continuation of the Management Agreement and the Sub-Advisory Agreements, the Board took into account that Fund stockholders, inpursuing their investment goals and objectives, may have purchased their shares of the Fund based upon the reputation and the investment style, philosophy and strategy of the Manager and the Sub-Advisers, as well as the resources available to theManager and the Sub-Advisers.

The Board concluded that, overall, the nature, extent, and quality of the management and other services provided (and expected to beprovided) to the Fund, under the Management Agreement and the Sub-Advisory Agreements were satisfactory.

Fund Performance

The Board received and considered information regarding Fund performance, including information and analyses (the Broadridge Performance Information) for theFund, as well as for a group of comparable funds (the Performance Universe) selected by Broadridge Financial Solutions, Inc. (Broadridge), an independent third-party provider of investment company data. The Board was providedwith a description of the methodology Broadridge used to determine the similarity of the Fund with the funds included in the Performance Universe. It was noted that while the Board found the Broadridge Performance Information generally useful, theyrecognized its limitations, including that the data may vary depending on the end date selected, and that the results of the performance comparisons may vary depending on the selection of the peer group and its composition over time. The Board alsonoted that Board members had received and discussed with the Manager and the Sub-Advisers information throughout the year at periodic intervals comparing the Funds performance against its benchmark and against the Funds peers. Inaddition, the Board considered the Funds performance in view of overall financial market conditions.

The Broadridge Performance Information comparing theFunds performance to that of its Performance Universe, consisting of the Fund and all closed-end non-leveraged BBB-rated corporate debt funds, regardless of asset size, showed, among other data, that based on net asset value per share, theFunds performance was below the median for the 1-, 3-, 5-and 10-year periods ended December31, 2022. The Board noted the explanations from the Manager and the Sub-Advisers regarding the Funds relative performance versus thePerformance Universe for the various periods. The Board also noted the limited size of the Performance Universe.

Based on the reviews and discussions of Fundperformance and considering other relevant factors, including an agreement at the Contract Renewal Meeting by the Manager to continue the current voluntary fee waiver of 0.05% through May31, 2024 (the Fee Waiver) and other factorsnoted above, the Board concluded, under the circ*mstances, that


48				Western Asset Investment Grade Defined Opportunity Trust Inc.

continuation of the Management Agreement and the Sub-Advisory Agreements for an additional one-year period would be consistent with the interests of the Fund and its stockholders.

Management and Sub-Advisory Fees and Expense Ratios

The Board reviewed and considered the contractual management fee (the Contractual Management Fee) and the actual management fee (the Actual ManagementFee) payable by the Fund to the Manager under the Management Agreement and the sub-advisory fees (the Sub-Advisory Fees) payable by the Manager to the Sub-Advisers under the Sub-Advisory Agreements in view of the nature, extent andoverall quality of the management, investment advisory and other services provided by the Manager and the Sub-Advisers, respectively. The Board noted that the Sub-Advisory Fee payable to Western Asset under its Sub-Advisory Agreement with theManager is paid by the Manager, not the Fund, and, accordingly, that the retention of Western Asset does not increase the fees or expenses otherwise incurred by the Funds stockholders. Similarly, the Board noted that the Sub-Advisory Feespayable to Western Asset London, Western Asset Singapore and Western Asset Japan under their Sub-Advisory Agreements with Western Asset are paid by Western Asset, not the Fund, and, accordingly, that the retention of Western Asset London, WesternAsset Singapore and Western Asset Japan does not increase the fees or expenses otherwise incurred by the Funds stockholders.

In addition, the Board receivedand considered information and analyses prepared by Broadridge (the Broadridge Expense Information) comparing the Contractual Management Fee and the Actual Management Fee and the Funds total actual expenses with those of funds inan expense universe (the Expense Universe) selected and provided by Broadridge. The comparison was based upon the constituent funds latest fiscal years. It was noted that while the Board found the Broadridge Expense Informationgenerally useful, they recognized its limitations, including that the data may vary depending on the selection of the peer group.

The Broadridge Expense Informationshowed that the Funds Contractual Management Fee was above the median. The Broadridge Expense Information also showed that the Funds Actual Management Fee was above the median. The Broadridge Expense Information also showed that theFunds actual total expenses were above the median. The Board took into account managements discussion of the Funds expenses and noted the limited size of the Expense Universe. The Board also considered the Managers agreementto continue the Fee Waiver for an additional year.

The Board also reviewed Contract Renewal Information regarding fees charged by the Manager and/or theSub-Advisers to other U.S. clients investing primarily in an asset class similar to that of the Fund, including, where applicable, institutional and separate accounts. The Manager reviewed with the Board the differences in services provided to


Western Asset Investment Grade Defined Opportunity Trust Inc.					49

Board approval of management and subadvisory agreements (unaudited) (contd)

these different types of accounts, noting that the Fund is provided with certain administrative services, office facilities, and Fund officers, and that the Fund issubject not only to heightened regulatory requirements relative to institutional clients but also to requirements for listing on the New York Stock Exchange, and that the Manager coordinates and oversees the provision of services to the Fund byother fund service providers. The Board considered the fee comparisons in view of the different services provided in managing these other types of clients and funds.

The Board considered the overall management fee, the fees of the Sub-Advisers and the amount of the management fee retained by the Manager after payment of thesubadvisory fees in each case in view of the services rendered for those amounts. The Board also received an analysis of complex-wide management fees provided by the Manager, which, among other things, set out a framework of fees based on assetclasses.

Taking all of the above into consideration, as well as the factors identified below, the Board determined that the management fee and the Sub-Advisory Feeswere reasonable in view of the nature, extent and overall quality of the management, investment advisory and other services provided by the Manager and the Sub-Advisers to the Fund under the Management Agreement and the Sub-Advisory Agreements,respectively.

Manager Profitability

TheBoard, as part of the Contract Renewal Information, received an analysis of the profitability to the Manager and its affiliates in providing services to the Fund for the Managers fiscal years ended September30, 2022 andSeptember30, 2021. The Board also received profitability information with respect to the Franklin Templeton/Legg Mason fund complex as a whole. In addition, the Board received Contract Renewal Information with respect to the Managersrevenue and cost allocation methodologies used in preparing such profitability data. It was noted that the allocation methodologies had been reviewed by an outside consultant. The profitability to each of the Sub-Advisers was not considered to be amaterial factor in the Boards considerations since the Sub-Advisory Fee is paid by the Manager in the case of Western Asset and by Western Asset in the case of Western Asset London, Western Asset Singapore and Western Asset Japan, not theFund, although the Board noted the affiliation of the Manager with the Sub-Advisers. The profitability of the Manager and its affiliates was considered by the Board to be reasonable in view of the nature, extent and quality of services provided tothe Fund.

Economies of Scale

The Boardreceived and discussed Contract Renewal Information concerning whether the Manager realizes economies of scale if the Funds assets grow. The Board noted that because the Fund is a closed-end fund it has limited ability to increase its assets.The Board determined that the management fee structure was appropriate under the circ*mstances. For similar reasons as stated above with respect to the Sub-Advisers


50				Western Asset Investment Grade Defined Opportunity Trust Inc.

profitability and the costs of the Sub-Advisers provision of services, the Board did not consider the potential for economies of scale in the Sub-Advisers management of the Fund to bea material factor in the Boards consideration of the Sub-Advisory Agreements.

Other Benefits to the Manager and the Sub-Advisers

The Board considered other benefits received by the Manager, the Sub-Advisers and their affiliates as a result of their relationship with the Fund,including the opportunity to offer additional products and services to the Funds shareholders. In view of the costs of providing investment management and other services to the Fund and the ongoing commitment of the Manager and theSub-Advisers to the Fund, the Board considered that the ancillary benefits that the Manager and its affiliates, including the Sub-Advisers, were reasonable.


Western Asset Investment Grade Defined Opportunity Trust Inc.					51

Additional shareholder information (unaudited)

Results of annual meeting of shareholders

TheAnnual Meeting of Shareholders of Western Asset Investment Grade Defined Opportunity Trust Inc. was held on April14, 2023, for the purpose of considering and voting upon the proposals presented at the Meeting. The following table providesinformation concerning the matters voted upon at the Meeting:

Election of Directors


Nominees	FOR		WITHHELD		ABSTAIN
Nisha Kumar		8,540,862		135,692		140,110
Jane Trust		8,593,225		97,675		125,764

At May31, 2023, in addition to Nisha Kumar and Jane Trust, the other Directors of the Fund were as follows:

Robert D. Agdern

Carol L. Colman

Daniel P. Cronin

Paolo M. Cucchi

Eileen A. Kamerick

Ratification of Selection of IndependentRegistered Public Accountants

To ratify the selection of PricewaterhouseCoopers LLP (PwC) as independent registered public accountants of theFund for the fiscal year ended November30, 2023.


FOR		AGAINST		ABSTAIN
	8,690,470		26,316		99,876


52				Western Asset Investment Grade Defined Opportunity Trust Inc.

Dividend reinvestment plan (unaudited)

Unless you elect to receive distributions in cash (i.e., opt-out), all dividends, including any capital gain dividends and return of capital distributions, on yourCommon Stock will be automatically reinvested by Computershare Trust Company, N.A., as agent for the stockholders (the Plan Agent), in additional shares of Common Stock under the Funds Dividend Reinvestment Plan (thePlan). You may elect not to participate in the Plan by contacting the Plan Agent. If you do not participate, you will receive all cash distributions paid by check mailed directly to you by Computershare Trust Company, N.A., as dividendpaying agent.

If you participate in the Plan, the number of shares of Common Stock you will receive will be determined as follows:

(1)If the market price of the Common Stock (plus $0.03 per share commission) on the payment date (or, if the payment date is not a NYSE tradingday, the immediately preceding trading day) is equal to or exceeds the net asset value per share of the Common Stock at the close of trading on the NYSE on the payment date, the Fund will issue new Common Stock at a price equal to the greater of(a)the net asset value per share at the close of trading on the NYSE on the payment date or (b)95% of the market price per share of the Common Stock on the payment date.

(2) If the net asset value per share of the Common Stock exceeds the market price of the Common Stock (plus $0.03 per share commission) at the close oftrading on the NYSE on the payment date, the Plan Agent will receive the dividend or distribution in cash and will buy Common Stock in the open market, on the NYSE or elsewhere, for your account as soon as practicable commencing on the trading dayfollowing the payment date and terminating no later than the earlier of (a)30 days after the dividend or distribution payment date, or (b)the payment date for the next succeeding dividend or distribution to be made to the stockholders;except when necessary to comply with applicable provisions of the federal securities laws. If during this period: (i)the market price (plus $0.03 per share commission) rises so that it equals or exceeds the net asset value per share of theCommon Stock at the close of trading on the NYSE on the payment date before the Plan Agent has completed the open market purchases or (ii)if the Plan Agent is unable to invest the full amount eligible to be reinvested in open market purchases,the Plan Agent will cease purchasing Common Stock in the open market and the Fund shall issue the remaining Common Stock at a price per share equal to the greater of (a)the net asset value per share at the close of trading on the NYSE on theday prior to the issuance of shares for reinvestment or (b)95% of the then current market price per share.

Common Stock in your account will be held by thePlan Agent in non-certificated form. Any proxy you receive will include all shares of Common Stock you have received under the Plan. You may withdraw from the Plan (i.e., opt-out) by notifying the Plan Agent in writing at P.O. Box 43006, Providence,RI 02940-3078 or by calling the Plan Agent at 1-888-888-0151. Such withdrawal will be effective immediately if notice is received by the Plan Agent not less than ten business days prior to any dividend or distribution record date; otherwise suchwithdrawal will be effective as soon as practicable after the Plan Agents investment of the most recently declared dividend or distribution on the Common Stock.


Western Asset Investment Grade Defined Opportunity Trust Inc.					53

Dividend reinvestment plan(unaudited) (contd)

Plan participants who sell their shares will be charged a service charge (currently $5.00 pertransaction) and the Plan Agent is authorized to deduct brokerage charges actually incurred from the proceeds (currently $0.05 per share commission). There is no service charge for reinvestment of your dividends or distributions in Common Stock.However, all participants will pay a pro rata share of brokerage commissions incurred by the Plan Agent when it makes open market purchases. Because all dividends and distributions will be automatically reinvested in additional shares of CommonStock, this allows you to add to your investment through dollar cost averaging, which may lower the average cost of your Common Stock over time. Dollar cost averaging is a technique for lowering the average cost per share over time if theFunds net asset value declines. While dollar cost averaging has definite advantages, it cannot assure profit or protect against loss in declining markets.

Automatically reinvesting dividends and distributions does not mean that you do not have to pay income taxes due upon receiving dividends and distributions. Investorswill be subject to income tax on amounts reinvested under the Plan.

The Fund reserves the right to amend or terminate the Plan if, in the judgment of the Board ofDirectors, the change is warranted. The Plan may be terminated, amended or supplemented by the Fund upon notice in writing mailed to stockholders at least 30 days prior to the record date for the payment of any dividend or distribution by the Fundfor which the termination or amendment is to be effective. Upon any termination, you will be sent cash for any fractional share of Common Stock in your account. You may elect to notify the Plan Agent in advance of such termination to have the PlanAgent sell part or all of your Common Stock on your behalf. Additional information about the Plan and your account may be obtained from the Plan Agent at P.O. Box 43006, Providence, RI 02940-3078 or by calling the Plan Agent at 1-888-888-0151.


54				Western Asset Investment Grade Defined Opportunity Trust Inc.

Western Asset

Investment Grade Defined Opportunity Trust Inc.

Directors

Robert D. Agdern

Carol L. Colman

Daniel P. Cronin

Paolo M. Cucchi

Eileen A. Kamerick

Nisha Kumar

Jane Trust

Chairman

Officers

Jane Trust

President and Chief Executive Officer

Christopher Berarducci

Treasurer and Principal Financial Officer

Fred Jensen

Chief Compliance Officer

George P. Hoyt

Secretary and Chief Legal Officer

Thomas C. Mandia

Senior Vice President

Jeanne M. Kelly

Senior Vice President

Western Asset Investment Grade Defined Opportunity Trust Inc.

620 Eighth Avenue

47th Floor

New York, NY 10018

Investment manager

Legg Mason Partners Fund Advisor, LLC

Subadvisers

Western Asset Management Company, LLC

Western Asset Management CompanyLimited

Western Asset Management Company Ltd

Western Asset Management CompanyPte. Ltd.

Custodian

The Bank of New YorkMellon

Transfer agent

Computershare Inc.

P.O. Box 43006

Providence, RI 02940-3078

Independent registered public accounting firm

PricewaterhouseCoopers LLP

Baltimore, MD

Legal counsel

Simpson Thacher& Bartlett LLP

900 G Street NW

Washington, DC 20001

New York Stock Exchange Symbol

IGI

Legg Mason Funds Privacy and Security Notice

Your Privacy and the Security of Your Personal Information is VeryImportant to the Legg Mason Funds

This Privacy and Security Notice (the Privacy Notice) addresses the Legg Mason Funds privacy anddata protection practices with respect to nonpublic personal information the Funds receive. The Legg Mason Funds include the Western Asset Money Market Funds sold by the Funds distributor, Franklin Distributors, LLC, as well as LeggMason-sponsored closed-end funds. The provisions of this Privacy Notice apply to your information both while you are a shareholder and after you are no longer invested with the Funds.

The Type of Nonpublic Personal Information the Funds Collect About You

The Funds collect and maintain nonpublic personal information about you in connection with yourshareholder account. Such information may include, but is not limited to:

Personal information included on applications or other forms;

Account balances, transactions, and mutual fund holdings and positions;

Bank account information, legal documents, and identity verification documentation; and

Online account access user IDs, passwords, security challenge question responses.

How the Funds Use Nonpublic Personal Information About You

The Funds do not sell or share your nonpublic personal information with third parties or with affiliates for their marketing purposes, unless you have authorized theFunds to do so. The Funds do not disclose any nonpublic personal information about you except as may be required to perform transactions or services you have authorized or as permitted or required by law.

The Funds may disclose information about you to:

Employees, agents, and affiliates on a need to know basis to enable the Funds to conduct ordinary business orto comply with obligations to government regulators;

Service providers, including the Funds affiliates, who assist the Funds as part of the ordinary course of business(such as printing, mailing services, or processing or servicing your account with us) or otherwise perform services on the Funds behalf, including companies that may perform statistical analysis, market research and marketing services solelyfor the Funds;

Permit access to transfer, whether in the United States or countries outside of the United States to such Fundsemployees, agents and affiliates and service providers as required to enable the Funds to conduct ordinary business, or to comply with obligations to government regulators;

The Funds representatives such as legal counsel, accountants and auditors to enable the Funds to conduct ordinarybusiness, or to comply with obligations to government regulators;

Fiduciaries or representatives acting on your behalf, such as an IRA custodian or trustee of a grantor trust.

NOTPARTOFTHESEMI-ANNUALREPORT

Legg Mason Funds Privacy and Security Notice (contd)

Except as otherwise permitted by applicable law, companies acting on the Funds behalf,including those outside the United States, are contractually obligated to keep nonpublic personal information the Funds provide to them confidential and to use the information the Funds share only to provide the services the Funds ask them toperform.

The Funds may disclose nonpublic personal information about you when necessary to enforce their rights or protect against fraud, or as permitted orrequired by applicable law, such as in connection with a law enforcement or regulatory request, subpoena, or similar legal process. In the event of a corporate action or in the event a Fund service provider changes, the Funds may be required todisclose your nonpublic personal information to third parties. While it is the Funds practice to obtain protections for disclosed information in these types of transactions, the Funds cannot guarantee their privacy policy will remainunchanged.

Keeping You Informed of the Funds Privacy and Security Practices

The Funds will notify you annually of their privacy policy as required by federal law. While the Funds reserve the right to modify this policy at any time, they willnotify you promptly if this privacy policy changes.

The Funds Security Practices

The Funds maintain appropriate physical, electronic and procedural safeguards designed to guard your nonpublic personal information. The Funds internal datasecurity policies restrict access to your nonpublic personal information to authorized employees, who may use your nonpublic personal information for Fund business purposes only.

Although the Funds strive to protect your nonpublic personal information, they cannot ensure or warrant the security of any information you provide or transmit to them,and you do so at your own risk. In the event of a breach of the confidentiality or security of your nonpublic personal information, the Funds will attempt to notify you as necessary so you can take appropriate protective steps. If you have consentedto the Funds using electronic communications or electronic delivery of statements, they may notify you under such circ*mstances using the most current email address you have on record with them.

In order for the Funds to provide effective service to you, keeping your account information accurate is very important. If you believe that your account information isincomplete, not accurate or not current, if you have questions about the Funds privacy practices, or our use of your nonpublic personal information, write the Funds using the contact information on your account statements, email the Funds byclicking on the Contact Us section of the Funds website at www.franklintempleton.com, or contact the Funds at 1-877-721-1926 for the Western Asset Money Market Funds or 1-888-777-0102 for the Legg Mason-sponsored closed-end funds.

Revised October 2022

NOTPARTOFTHESEMI-ANNUALREPORT

Legg Mason Funds Privacy and Security Notice (contd)

Legg Mason California Consumer Privacy Act Policy

Although much of the personal information we collect is nonpublic personal information subject to federal law, residents of California may, in certaincirc*mstances, have additional rights under the California Consumer Privacy Act (CCPA). For example, if you are a broker, dealer, agent, fiduciary, or representative acting by or on behalf of, or for, the account of any other person(s)or household, or a financial advisor, or if you have otherwise provided personal information to us separate from the relationship we have with personal investors, the provisions of this Privacy Policy apply to your personal information (as definedby the CCPA).

In addition to the provisions of the Legg Mason Funds Security and Privacy Notice, you may have the right to know the categories and specific piecesof personal information we have collected about you.

You also have the right to request the deletion of the personal information collected or maintained by theFunds.

If you wish to exercise any of the rights you have in respect of your personal information, you should advise the Funds by contacting them as set forthbelow. The rights noted above are subject to our other legal and regulatory obligations and any exemptions under the CCPA. You may designate an authorized agent to make a rights request on your behalf, subject to the identification process describedbelow. We do not discriminate based on requests for information related to our use of your personal information, and you have the right not to receive discriminatory treatment related to the exercise of your privacy rights.

We may request information from you in order to verify your identity or authority in making such a request. If you have appointed an authorized agent to make a requeston your behalf, or you are an authorized agent making such a request (such as a power of attorney or other written permission), this process may include providing a password/passcode, a copy of government issued identification, affidavit or otherapplicable documentation, i.e. written permission. We may require you to verify your identity directly even when using an authorized agent, unless a power of attorney has been provided. We reserve the right to deny a request submitted by an agent ifsuitable and appropriate proof is not provided.

For the 12-month period prior to the date of this Privacy Policy, the Legg Mason Funds have not sold any of yourpersonal information; nor do we have any plans to do so in the future.

Contact Information

Address: Data Privacy Officer, 100 International Dr., Baltimore, MD 21202

Email: DataProtectionOfficer@franklintempleton.com

Phone: 1-800-396-4748

Revised October 2022

NOTPARTOFTHESEMI-ANNUALREPORT

Western Asset Investment Grade Defined Opportunity Trust Inc.

Western Asset Investment Grade Defined Opportunity Trust Inc.

620 Eighth Avenue

47th Floor

New York, NY 10018

Notice is hereby given in accordance with Section23(c) of the Investment Company Act of 1940, as amended, that from time to time the Fund may purchase, at marketprices, shares of its stock.

The Fund files its complete schedule of portfolio holdings with the Securities and Exchange Commission (SEC) for the firstand third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. The Funds Forms N-PORT are available on the SECs website at www.sec.gov. To obtain information on Form N-PORT, shareholders can call the Fund at1-888-777-0102.

Information on how the Fund voted proxies relating to portfolio securities during the prior 12-month period ended June30th of each year and adescription of the policies and procedures that the Fund uses to determine how to vote proxies related to portfolio transactions are available (1)without charge, upon request, by calling 1-888-777-0102, (2)at www.franklintempleton.comand (3)on the SECs website at www.sec.gov.

Quarterly performance, semi-annual and annual reports, current net asset value and other information regardingthe Fund may be found on Franklin Templetons website, which can be accessed at www.franklintempleton.com. Any reference to Franklin Templetons website in this report is intended to allow investors public access to information regardingthe Fund and does not, and is not intended to, incorporate Franklin Templetons website in this report.

This report is transmitted to the shareholders ofWestern Asset Investment Grade Defined Opportunity Trust Inc. for their information. This is not a prospectus, circular or representation intended for use in the purchase of shares of the Fund or any securities mentioned in this report.

Computershare Inc.

P.O. Box 43006

Providence, RI 02940-3078

WASX012742 07/23 SR23-4679


ITEM2.		CODE OF ETHICS.

		Not applicable.

ITEM 3.		AUDIT COMMITTEE FINANCIAL EXPERT.

		Not applicable.

ITEM 4.		PRINCIPAL ACCOUNTANT FEES AND SERVICES.

		Not applicable.

ITEM 5.		AUDIT COMMITTEE OF LISTED REGISTRANTS.

		Not applicable.

ITEM 6.		SCHEDULE OF INVESTMENTS.

		Included herein under Item 1.

ITEM 7.		DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

		Not applicable.

ITEM 8.		PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

		Not applicable.

ITEM 9.		PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS.

		Not applicable.

ITEM10.		SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

		Not applicable.

ITEM 11.		CONTROLS AND PROCEDURES.
		(a) Theregistrants principal executive officer and principal financial officer have concluded that the registrants disclosure controls and procedures (as defined in Rule 30a- 3(c) under the InvestmentCompany Act of 1940, as amended (the 1940 Act)) are effective as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the disclosure controls andprocedures required by Rule 30a-3(b) under the 1940 Act and 15d-15(b) under the Securities Exchange Act of 1934. (b) There were no changes inthe registrants internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act) that occurred during the period covered by this report that have materially affected, or arelikely to materially affect the registrants internal control over financial reporting.


ITEM 12.		DISCLOSURE OF SECURITIES LENDING ACTIVITIES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

		Not applicable

ITEM 13.		EXHIBITS.

		(a)(1)Not applicable. Exhibit99.CODE ETH

		(a)(2)Certifications pursuant to section 302 of the Sarbanes-Oxley Act of 2002 attached hereto. Exhibit99.CERT

		(b)Certifications pursuant to Section906 of the Sarbanes-Oxley Act of 2002 attached hereto. Exhibit99.906CERT

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused thisReport to be signed on its behalf by the undersigned, there unto duly authorized.

Western Asset Investment Grade Defined Opportunity Trust Inc.


By:		/s/ Jane Trust
		Jane Trust
		Chief Executive Officer

Date:		July26, 2023

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940,this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.


By:		/s/ Jane Trust
		Jane Trust
		Chief Executive Officer

Date:		July26, 2023

By:		/s/ Christopher Berarducci
		Christopher Berarducci
		Principal Financial Officer

Date:		July26, 2023

CERTIFICATIONS PURSUANT TO SECTION 302

EX-99.CERT

CERTIFICATIONS

I, Jane Trust, certify that:

1.	I have reviewed this report on Form N-CSR of Western Asset InvestmentGrade Defined Opportunity Trust Inc.;

2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state amaterial fact necessary to make the statements made, in light of the circ*mstances under which such statements were made, not misleading with respect to the period covered by this report;

Based on my knowledge, the financial statements, and other financial information included in this report,fairly present in all material respects the financial condition, results of operations, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of the registrant as of, and for, theperiods presented in this report;

The registrants other certifying officers and I are responsible for establishing and maintainingdisclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule30a-3(d) under the Investment Company Act of 1940) for the registrant and have:

Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to bedesigned under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report isbeing prepared;

Designed such internal control over financial reporting, or caused such internal control over financialreporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accountingprinciples;

Evaluated the effectiveness of the registrants disclosure controls and procedures and presented in thisreport our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report based on such evaluation; and

Disclosed in this report any change in the registrants internal control over financial reporting thatoccurred during the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrants internal control over financial reporting; and

5.	The registrants other certifying officers and I have disclosed to the registrants auditors and theaudit committee of the registrants board of directors (or persons performing the equivalent functions):

All significant deficiencies and material weaknesses in the design or operation of internal control overfinancial reporting which are reasonably likely to adversely affect the registrants ability to record, process, summarize, and report financial information; and

Any fraud, whether or not material, that involves management or other employees who have a significant role inthe registrants internal control over financial reporting.

CERTIFICATIONS

I, Christopher Berarducci, certify that:

1.	I have reviewed this report on Form N-CSR of Western Asset InvestmentGrade Defined Opportunity Trust Inc.;

2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state amaterial fact necessary to make the statements made, in light of the circ*mstances under which such statements were made, not misleading with respect to the period covered by this report;

Based on my knowledge, the financial information included in this report, and the financial statements on whichthe financial information is based, fairly present in all material respects the financial condition, results of operations, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of theregistrant as of, and for, the periods presented in this report;

5.	The registrants other certifying officers and I have disclosed to the registrants auditors and theaudit committee of the registrants board of directors (or persons performing the equivalent functions):

Any fraud, whether or not material, that involves management or other employees who have a significant role inthe registrants internal control over financial reporting.

CERTIFICATIONS PURSUANT TO SECTION 906

EX-99.906CERT

CERTIFICATION

Jane Trust, ChiefExecutive Officer, and Christopher Berarducci, Principal Financial Officer of Western Asset Investment Grade Defined Opportunity Trust Inc. (the Registrant), each certify to the best of their knowledge that:

1.The Registrants periodic report on Form N-CSR for the period endedMay31, 2023 (the Form N-CSR) fully complies with the requirements of section 15(d) of the Securities Exchange Act of 1934, as amended; and

2.The information contained in the Form N-CSR fairly presents, in all materialrespects, the financial condition and results of operations of the Registrant.


Chief Executive Officer				Principal Financial Officer
Western Asset Investment Grade Defined				Western Asset Investment Grade Defined
Opportunity Trust Inc.				Opportunity Trust Inc.

/s/ Jane Trust				/s/ Christopher Berarducci
Jane Trust				Christopher Berarducci
Date: July26, 2023				Date: July26, 2023

This certification is being furnished to the Securities and Exchange Commission solely pursuant to 18 U.S.C. § 1350 andis not being filed as part of the Form N-CSR with the Commission.