Edgar Filing: Western Asset Investment Grade Defined Opportunity Trust Inc.

Western Asset Investment Grade Defined Opportunity Trust Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811-22294

Western Asset Investment Grade Defined Opportunity Trust Inc.

(Exact name of registrant as specified in charter)

620 Eighth Avenue, 49^th Floor, New York, NY 10018

(Address of principal executive offices) (Zip code)

Robert I. Frenkel, Esq.

Legg Mason & Co., LLC

100 First Stamford Place

Stamford, CT 06902

(Name and address of agent for service)

Registrant’s telephone number, including area code: (888) 777-0102

Date of fiscal year end: November 30

Date of reporting period: May 31, 2015

ITEM 1.

REPORT TO STOCKHOLDERS.

The Semi-Annual Report to Stockholders is filed herewith.

LOGO


Semi-Annual Report		May 31, 2015

WESTERN ASSET

INVESTMENT GRADE

DEFINED OPPORTUNITY

TRUST INC. (IGI)

LOGO

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


What’s inside
Letter from the chairman			II
Investment commentary			III
Fund at a glance			1
Spread duration			2
Effective duration			3
Schedule of investments			4
Statement of assets and liabilities			15
Statement of operations			16
Statements of changes in net assets			17
Financial highlights			18
Notes to financial statements			19
Additional shareholder information			35
Dividend reinvestment plan			36

Fund objective

The Fund’s primary investment objective is to provide current income and then to liquidate and distribute substantially all of the Fund’s net assets to stockholders on or about December 2, 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 fixed-income securities of varying maturities.

Letter from the chairman

LOGO

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 May 31, 2015. Please read on for Fund performance information and a detailed look at prevailing economic and market conditions during the Fund’s reporting period.

As always, we remain committed to providing you with excellent service 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.lmcef.com. Here you can gain immediate 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,

LOGO

Kenneth D. Fuller

Chairman, President and Chief Executive Officer

June 26, 2015


II		Western Asset Investment Grade Defined Opportunity Trust Inc.

Investment commentary

Economic review

The U.S. economy expanded moderately during the six months ended May 31, 2015 (the “reporting period”). While the U.S. Department of Commerce reported that third quarter 2014 U.S. gross domestic product (“GDP”)ⁱ growth was a strong 5.0%, fourth quarter 2014 GDP growth slowed to a more modest 2.2%. The deceleration in growth primarily reflected an upturn in imports, a downturn in federal government spending and moderating nonresidential fixed investment. In addition, the U.S. Department of Commerce reported that first quarter 2015 GDP growth was -0.2%. This downturn was attributed to a number of factors, including a deceleration in personal consumption expenditures, along with negative contributions from exports, nonresidential fixed investment, and state and local government spending.

Activity in the U.S. manufacturing sector also moderated during the reporting period. Based on the Institute for Supply Management’s Purchasing Managers’ Index (“PMI”)ⁱⁱ, U.S. manufacturing expanded during all six months of the reporting period (a reading below 50 indicates a contraction, whereas a reading above 50 indicates an expansion). After a reading of 55.1 in December 2014, the PMI generally decelerated over much of the reporting period and the PMI was 52.8 in May 2015.

The labor market was a moderate tailwind for the economy during the reporting period. When the period began, unemployment was 5.6%, as reported by the U.S. Department of Labor. By May 2015, unemployment was 5.5%, close to its lowest level since May 2008.


Western Asset Investment Grade Defined Opportunity Trust Inc.		III

Investment commentary (cont’d)

Market review

Q. How did the Federal Reserve Board (“Fed”)ⁱⁱⁱ respond to the economic environment?

A. The Fed took a number of actions as it sought to meet its dual mandate of fostering maximum employment and price stability. As it has since December 2008, the Fed maintained the federal funds rate^iv at a historically low range between zero and 0.25%. The Fed ended its asset purchase program that was announced in December 2012. In December 2014, the Fed said that “it can be patient in beginning to normalize the stance of monetary policy.” At its meeting that ended on April 29, 2015, the Fed said, “…economic growth slowed during the winter months, in part reflecting transitory factors.” Finally, at its meeting that concluded on June 17, 2015, after the reporting period ended, the Fed said, “The Committee currently anticipates that, even after employment and inflation are near mandate-consistent levels, economic conditions may, for some time, warrant keeping the target federal funds rate below levels the Committee views as normal in the longer run.”

Q. Did Treasury yields trend higher or lower during the six months ended May 31, 2015?

A. Short-term Treasury yields moved higher, whereas long-term Treasury yields declined during the reporting period. When the reporting period began, the yield on the two-year Treasury note was 0.47%. It peaked at 0.73% towards the end of December 2014 and again on March 6, 2015, and fell as low as 0.44% on January 15, 2015, before ending the period at 0.61%. The yield on the ten-year Treasury note began the period at 2.18% and its peak of 2.31% occurred on December 5, 2014. The yield on the ten-year Treasury note was as low as 1.68% in late January/early February 2015 and concluded the period at 2.12%.

Q. What factors impacted the spread sectors (non-Treasuries) during the reporting period?

A. The spread sectors generally posted positive, albeit small gains, during the reporting period. Performance fluctuated with investor sentiment given the uncertainties regarding future Fed monetary policy, along with concerns over global growth and geopolitical issues. The broad U.S. bond market, as measured by the Barclays U.S. Aggregate Index^v, gained 1.09% during the six months ended May 31, 2015.

Q. How did the high-yield bond market perform over the six months ended May 31, 2015?

A. The U.S. high-yield bond market, as measured by the Barclays U.S. Corporate High Yield — 2% Issuer Cap Index^vi, returned 2.57% for the six months ended May 31, 2015. High yield bonds were volatile during the reporting period. While the underlying fundamentals in the high-yield market remained generally solid and default rates were well below their long-term average, the asset class was dragged down at times, primarily due to sharply falling oil prices. However, the high-yield market rallied late in the reporting period as oil prices stabilized and investor demand improved

Q. How did the emerging markets debt asset class perform over the reporting period?

A. The JPMorgan Emerging Markets Bond Index Global (“EMBI Global”)^vii returned 0.55% during the six months ended May 31, 2015. While the asset class generally rose


IV		Western Asset Investment Grade Defined Opportunity Trust Inc.

during much of the reporting period, those gains were largely offset by a sharp decline during December 2014. This setback was triggered by a number of factors, including expectations for future Fed rate hikes, concerns over global growth, declining oil prices and weak investor demand.

Performance review

For the six months ended May 31, 2015, Western Asset Investment Grade Defined Opportunity Trust Inc. returned 1.21% based on its net asset value (“NAV”)^viii and 3.53% based on its New York Stock Exchange (“NYSE”) market price per share. The Fund’s unmanaged benchmark, the Barclays U.S. Credit Index^ix, returned 0.99% for the same period. The Lipper Corporate Debt BBB-Rated Closed-End Funds Category Average^x returned 1.01% over the same time frame. Please note that Lipper performance returns are based on each fund’s NAV.

During this six-month period, the Fund made distributions to shareholders totaling $0.60 per share. As of May 31, 2015, the Fund estimates that all of the distributions were sourced from net investment income.* The performance table shows the Fund’s six-month total return based on its NAV and market price as of May 31, 2015. Past performance is no guarantee of future results.


Performance Snapshot as of May 31, 2015 (unaudited)
Price Per Share	6-Month Total Return**
$21.28 (NAV)		1.21	%†
$21.00 (Market Price)		3.53	%‡

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

** Total returns are based on changes in NAV or market price, respectively. Returns reflect the deduction of 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 Fund’s Dividend 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 available on-line under the symbol “XIGIX” on most financial websites. Barron’s and the Wall Street Journal’s Monday edition both carry closed-end fund tables that provide additional information. In addition, the Fund issues a quarterly press release that can be found on most major financial websites as well as www.lmcef.com.

This estimate is not for tax purposes. The Fund will issue a Form 1099 with final composition of the distributions for tax purposes after year-end. A return of capital is not taxable and results in a reduction in the tax basis of a shareholder’s investment. For more information about a distribution’s composition, please refer to the Fund’s distribution press release or, if applicable, the Section 19 notice located in the press release section of our website, www.lmcef.com.


Western Asset Investment Grade Defined Opportunity Trust Inc.		V

Investment commentary (cont’d)

In a continuing effort to provide information concerning the Fund, shareholders may call 1-888-777-0102 (toll free), Monday through Friday from 8:00 a.m. to 5:30 p.m. Eastern Time, for the Fund’s 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 and we remain focused on achieving the Fund’s investment goals.

Sincerely,

LOGO

Kenneth D. Fuller

Chairman, President and Chief Executive Officer

June 26, 2015

RISKS: The Fund’s investments are subject to credit risk, inflation risk and interest rate risk. As interest rates rise, bond prices fall, reducing the value of the Fund’s holdings. The Fund may invest in lower-rated high-yield bonds or “junk bonds”, which are subject to greater 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 increase losses 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.

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

The information provided is not intended to be a forecast of future events, a guarantee of future results or investment advice. Views expressed may differ from those of the firm as a whole.


VI		Western Asset Investment Grade Defined Opportunity Trust Inc.

ⁱ	Gross domestic product (“GDP”) is the market value of all final goods and services produced within a country in a given period of time.

ⁱⁱ	The Institute for Supply Management’s PMI is based on a survey of purchasing executives who buy the raw materials for manufacturing at more than 350 companies. It offers an early reading on the health of the U.S. manufacturing sector.

ⁱⁱⁱ	The Federal Reserve Board (“Fed”) is responsible for the formulation of policies designed to promote economic growth, full employment, stable prices and a sustainable pattern of international trade and payments.

^iv	The federal funds rate is the rate charged by one depository institution on an overnight sale of immediately available funds (balances at the Federal Reserve) to another depository institution; the rate may vary from depository institution to depository institution and from day to day.

^v	The Barclays U.S. Aggregate Index is a broad-based bond index comprised of government, corporate, mortgage- and asset-backed issues, rated investment grade or higher, and having at least one year to maturity.

^vi	The Barclays U.S. Corporate High Yield — 2% Issuer Cap Index is an index of the 2% Issuer Cap component of the Barclays U.S. Corporate High Yield Index, which covers the U.S. dollar-denominated, non-investment grade, fixed-rate, taxable corporate bond market.

^vii	The JPMorgan Emerging Markets Bond Index Global (“EMBI Global”) tracks total returns for U.S. dollar-denominated debt instruments issued by emerging market sovereign and quasi-sovereign entities: Brady bonds, loans, Eurobonds and local market instruments.

^viii

Net asset value (“NAV”) is calculated by subtracting total liabilities, including liabilities associated with financial 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 the market 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 Fund’s market price as determined by supply of and demand for the Fund’s shares.

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

Lipper, Inc., a wholly-owned subsidiary of Reuters, provides independent insight on global collective investments. Returns are based on the six-month period ended May 31, 2015, including the reinvestment of all distributions, including returns of capital, if any, calculated among the 10 funds in the Fund’s Lipper category.


Western Asset Investment Grade Defined Opportunity Trust Inc.		VII

Fund at a glance^† (unaudited)

Investment breakdown (%) as a percent of total investments

LOGO

†

The bar graph above represents the composition of the Fund’s investments as of May 31, 2015 and November 30, 2014 and does not include derivatives, such as futures contracts, swap contracts and forward foreign currency contracts. The Fund is actively managed. As a result, the composition of the Fund’s investments is subject to change at any time.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		1

Spread duration (unaudited)

Economic exposure — May 31, 2015

LOGO


Total Spread Duration
IGI		— 7.28 years
Benchmark		— 7.14 years

Spread duration measures the sensitivity to changes in spreads. The spread over Treasuries is the annual risk-premium demanded by investors to hold non-Treasury securities. Spread duration is quantified as the % change in price resulting from a 100 basis points change in spreads. For a security with positive spread duration, an increase in spreads would result in a price decline and a decline in spreads would result in a price increase. This chart highlights the market sector exposure of the Fund’s sectors relative to the selected benchmark sectors as of the end of the reporting period.


Benchmark		— Barclays U.S. Credit Index
EM		— Emerging Markets
HY		— High Yield
IG Credit		— Investment Grade Credit
IGI		— Western Asset Investment Grade Defined Opportunity Trust Inc.


2		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report

Effective duration (unaudited)

Interest rate exposure — May 31, 2015

LOGO


Total Effective Duration
IGI		— 6.86 years
Benchmark		— 7.23 years

Effective duration measures the sensitivity to changes in relevant interest rates. Effective duration is quantified as the % change in price resulting from a 100 basis points change in interest rates. For a security with positive effective duration, an increase in interest rates would result in a price decline and a decline in interest rates would result in a price increase. This chart highlights the interest rate exposure of the Fund’s sectors relative to the selected benchmark sectors as of the end of the reporting period.


Benchmark		— Barclays U.S. Credit Index
EM		— Emerging Markets
HY		— High Yield
IG Credit		— Investment Grade Credit
IGI		— Western Asset Investment Grade Defined Opportunity Trust Inc.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		3

Schedule of investments (unaudited)

May 31, 2015

Western Asset Investment Grade Defined Opportunity Trust Inc.


Security	Rate			Maturity Date		Face Amount		Value
Corporate Bonds & Notes — 94.2%
Consumer Discretionary — 12.0%
Auto Components — 0.6%
ZF North America Capital Inc., Senior Notes		4.000	%		4/29/20	$	570,000	$	582,113	^(a)
ZF North America Capital Inc., Senior Notes		4.500	%		4/29/22		300,000		306,375	^(a)
ZF North America Capital Inc., Senior Notes		4.750	%		4/29/25		590,000		592,212	^(a)
Total Auto Components									1,480,700
Automobiles — 2.5%
Ford Motor Co., Senior Bonds		9.215	%		9/15/21		1,140,000		1,506,473
Ford Motor Credit Co., LLC, Senior Notes		8.125	%		1/15/20		640,000		793,048
Ford Motor Credit Co., LLC, Senior Notes		4.250	%		9/20/22		380,000		405,086
General Motors Co., Senior Notes		4.875	%		10/2/23		1,470,000		1,573,886
General Motors Co., Senior Notes		5.200	%		4/1/45		490,000		501,887
General Motors Financial Co. Inc., Senior Notes		4.375	%		9/25/21		930,000		972,586
Total Automobiles									5,752,966
Hotels, Restaurants & Leisure — 0.3%
Hilton Worldwide Finance LLC/Hilton Worldwide Finance Corp., Senior Notes		5.625	%		10/15/21		170,000		179,988
Wynn Macau Ltd., Senior Notes		5.250	%		10/15/21		480,000		469,200	^(a)
Total Hotels, Restaurants & Leisure									649,188
Household Durables — 0.6%
Toll Brothers Finance Corp., Senior Notes		4.000	%		12/31/18		1,140,000		1,171,350
Toll Brothers Finance Corp., Senior Notes		6.750	%		11/1/19		160,000		181,200
Total Household Durables									1,352,550
Media — 7.2%
21st Century Fox America Inc., Senior Notes		6.650	%		11/15/37		2,400,000		3,055,946
Comcast Corp., Bonds		6.400	%		5/15/38		2,500,000		3,187,387
Comcast Corp., Senior Notes		5.700	%		7/1/19		1,500,000		1,728,720
DISH DBS Corp., Senior Notes		7.875	%		9/1/19		1,250,000		1,415,625
DISH DBS Corp., Senior Notes		5.875	%		11/15/24		700,000		703,500
Time Warner Cable Inc., Debentures		7.300	%		7/1/38		160,000		187,101
Time Warner Cable Inc., Senior Bonds		6.550	%		5/1/37		370,000		400,703
Time Warner Cable Inc., Senior Bonds		4.500	%		9/15/42		120,000		104,489
Time Warner Cable Inc., Senior Notes		8.750	%		2/14/19		1,390,000		1,659,866
Time Warner Cable Inc., Senior Notes		5.500	%		9/1/41		80,000		77,601
Time Warner Entertainment Co., LP, Senior Notes		8.375	%		7/15/33		370,000		469,524
Time Warner Inc., Senior Notes		4.900	%		6/15/42		250,000		257,938
UBM PLC, Notes		5.750	%		11/3/20		740,000		815,013	^(a)
Virgin Media Finance PLC, Senior Notes		6.375	%		4/15/23		2,000,000		2,132,500	^(a)

See Notes to Financial Statements.


4		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.


Security	Rate			Maturity Date		Face Amount		Value
Media — continued
WPP Finance 2010, Senior Notes		5.625	%		11/15/43	$	260,000	$	298,125
Total Media									16,494,038
Specialty Retail — 0.8%
American Greetings Corp., Senior Notes		7.375	%		12/1/21		280,000		298,900
Gap Inc., Senior Notes		5.950	%		4/12/21		1,240,000		1,428,355
Total Specialty Retail									1,727,255
Total Consumer Discretionary									27,456,697
Consumer Staples — 3.8%
Beverages — 1.1%
Anheuser-Busch InBev Worldwide Inc., Senior Notes		7.750	%		1/15/19		450,000		539,581
Constellation Brands Inc., Senior Notes		4.250	%		5/1/23		140,000		141,750
Pernod-Ricard SA, Senior Bonds		5.750	%		4/7/21		590,000		676,557	^(a)
Pernod-Ricard SA, Senior Notes		5.500	%		1/15/42		960,000		1,098,013	^(a)
Total Beverages									2,455,901
Food Products — 0.3%
Kraft Foods Group Inc., Senior Notes		5.000	%		6/4/42		280,000		290,744
Mondelez International Inc., Senior Notes		4.000	%		2/1/24		410,000		437,236
Total Food Products									727,980
Tobacco — 2.4%
Altria Group Inc., Senior Notes		9.250	%		8/6/19		1,000,000		1,272,617
Altria Group Inc., Senior Notes		9.950	%		11/10/38		430,000		720,676
Altria Group Inc., Senior Notes		10.200	%		2/6/39		280,000		477,746
Lorillard Tobacco Co., Senior Notes		8.125	%		6/23/19		540,000		655,649
Lorillard Tobacco Co., Senior Notes		8.125	%		5/1/40		470,000		635,712
Lorillard Tobacco Co., Senior Notes		7.000	%		8/4/41		510,000		633,486
Reynolds American Inc., Senior Notes		4.750	%		11/1/42		1,220,000		1,174,454
Total Tobacco									5,570,340
Total Consumer Staples									8,754,221
Energy — 11.8%
Energy Equipment & Services — 0.4%
Ensco PLC, Senior Notes		5.200	%		3/15/25		790,000		815,952
Pride International Inc., Senior Notes		7.875	%		8/15/40		150,000		171,861
Total Energy Equipment & Services									987,813
Oil, Gas & Consumable Fuels — 11.4%
Anadarko Petroleum Corp., Senior Notes		5.950	%		9/15/16		340,000		360,440
Apache Corp., Senior Notes		6.000	%		1/15/37		150,000		171,480
Apache Corp., Senior Notes		5.100	%		9/1/40		280,000		283,911
Apache Corp., Senior Notes		5.250	%		2/1/42		160,000		167,930

See Notes to Financial Statements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		5

Schedule of investments (unaudited) (cont’d)

May 31, 2015

Western Asset Investment Grade Defined Opportunity Trust Inc.


Security	Rate			Maturity Date		Face Amount		Value
Oil, Gas & Consumable Fuels — continued
Apache Corp., Senior Notes		4.750	%		4/15/43	$	670,000	$	651,162
Columbia Pipeline Group Inc., Senior Notes		5.800	%		6/1/45		340,000		353,192	^(a)
Comstock Resources Inc., Senior Secured Notes		10.000	%		3/15/20		580,000		562,600	^(a)
ConocoPhillips, Notes		6.500	%		2/1/39		1,500,000		1,942,692
Devon Financing Corp. LLC, Debentures		7.875	%		9/30/31		1,080,000		1,442,274
Ecopetrol SA, Senior Notes		5.875	%		5/28/45		284,000		263,978
Energy Transfer Equity LP, Senior Notes		7.500	%		10/15/20		420,000		481,950
EOG Resources Inc., Senior Notes		6.875	%		10/1/18		800,000		935,158
EXCO Resources Inc., Senior Notes		7.500	%		9/15/18		120,000		83,100
Halcon Resources Corp., Secured Notes		8.625	%		2/1/20		290,000		295,075	^(a)
Hess Corp., Notes		8.125	%		2/15/19		1,400,000		1,681,289
Hess Corp., Notes		7.875	%		10/1/29		440,000		573,519
Hess Corp., Senior Bonds		6.000	%		1/15/40		520,000		575,702
Kerr-McGee Corp., Notes		6.950	%		7/1/24		1,320,000		1,648,555
Kerr-McGee Corp., Notes		7.875	%		9/15/31		710,000		958,196
Kinder Morgan Energy Partners LP, Senior Notes		5.950	%		2/15/18		800,000		881,249
LUKOIL International Finance BV, Senior Notes		4.563	%		4/24/23		940,000		856,575	^(a)
Marathon Petroleum Corp., Senior Notes		3.625	%		9/15/24		560,000		566,817
MEG Energy Corp., Senior Notes		6.375	%		1/30/23		900,000		855,000	^(a)
Murray Energy Corp., Senior Secured Notes		11.250	%		4/15/21		740,000		715,950	^(a)
Noble Energy Inc., Senior Notes		6.000	%		3/1/41		660,000		729,583
Noble Energy Inc., Senior Notes		5.250	%		11/15/43		240,000		246,360
Pemex Project Funding Master Trust, Senior Bonds		6.625	%		6/15/35		1,000,000		1,128,000
Petrobras Global Finance BV, Senior Notes		7.250	%		3/17/44		440,000		435,644
Petrobras International Finance Co., Senior Notes		5.750	%		1/20/20		109,000		109,153
Petroleos Mexicanos, Senior Notes		5.500	%		1/21/21		250,000		274,153
Petroleos Mexicanos, Senior Notes		6.375	%		1/23/45		80,000		87,184
Plains Exploration & Production Co., Senior Notes		6.500	%		11/15/20		32,000		34,000
Plains Exploration & Production Co., Senior Notes		6.875	%		2/15/23		410,000		441,263
Shell International Finance BV, Senior Notes		4.375	%		5/11/45		590,000		606,322
Transcontinental Gas Pipe Line Co., LLC, Senior Notes		5.400	%		8/15/41		10,000		10,053
Transcontinental Gas Pipe Line Co., LLC, Senior Notes		4.450	%		8/1/42		860,000		761,945
Valero Energy Corp., Senior Notes		9.375	%		3/15/19		700,000		872,817
Williams Cos. Inc., Notes		7.875	%		9/1/21		952,000		1,166,111
Williams Cos. Inc., Senior Notes		4.550	%		6/24/24		1,130,000		1,158,323
Williams Cos. Inc., Senior Notes		7.750	%		6/15/31		62,000		73,991
Williams Cos. Inc., Senior Notes		8.750	%		3/15/32		148,000		190,634

See Notes to Financial Statements.


6		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.


Security	Rate			Maturity Date		Face Amount		Value
Oil, Gas & Consumable Fuels — continued
Williams Partners LP, Senior Notes		5.250	%		3/15/20	$	460,000	$	511,867
Total Oil, Gas & Consumable Fuels									26,145,197
Total Energy									27,133,010
Financials — 36.7%
Banks — 15.4%
Bank of America Corp., Junior Subordinated Bonds		6.100	%		3/17/25		650,000		656,500	^(b)(c)
Bank of America Corp., Junior Subordinated Notes		6.250	%		9/5/24		970,000		990,612	^(b)(c)
Bank of America Corp., Junior Subordinated Notes		6.500	%		10/23/24		400,000		423,500	^(b)(c)
Bank of America Corp., Senior Notes		7.625	%		6/1/19		2,760,000		3,313,256
Bank of America Corp., Senior Notes		5.875	%		2/7/42		1,340,000		1,652,958
Barclays Bank PLC, Subordinated Notes		7.625	%		11/21/22		630,000		733,556
CIT Group Inc., Secured Notes		6.625	%		4/1/18		480,000		517,776	^(a)
CIT Group Inc., Senior Notes		5.000	%		8/1/23		350,000		359,170
Citigroup Inc., Junior Subordinated Bonds		6.300	%		5/15/24		470,000		472,350	^(b)(c)
Citigroup Inc., Junior Subordinated Bonds		5.950	%		5/15/25		880,000		869,000	^(b)(c)
Citigroup Inc., Senior Notes		6.000	%		8/15/17		2,250,000		2,463,464
Citigroup Inc., Senior Notes		8.500	%		5/22/19		500,000		617,400
Citigroup Inc., Senior Notes		8.125	%		7/15/39		1,350,000		2,041,203
Citigroup Inc., Subordinated Notes		6.675	%		9/13/43		630,000		803,382
Cooperatieve Centrale Raiffeisen-Boerenleenbank BA of Netherlands, Subordinated Notes		5.750	%		12/1/43		750,000		882,332
Credit Agricole SA, Junior Subordinated Notes		8.375	%		10/13/19		500,000		592,500	^(a)(b)(c)
HSBC Holdings PLC, Junior Subordinated Bonds		6.375	%		9/17/24		1,000,000		1,028,750	^(b)(c)
HSBC Holdings PLC, Junior Subordinated Bonds		6.375	%		3/30/25		200,000		205,700	^(b)(c)
JPMorgan Chase & Co., Junior Subordinated Bonds		6.000	%		8/1/23		700,000		715,750	^(b)(c)
JPMorgan Chase & Co., Senior Notes		6.400	%		5/15/38		1,500,000		1,920,058
JPMorgan Chase & Co., Subordinated Notes		5.625	%		8/16/43		760,000		862,507
JPMorgan Chase & Co., Subordinated Notes		4.950	%		6/1/45		150,000		152,562
M&T Bank Corp., Junior Subordinated Bonds		6.875	%		6/15/16		1,060,000		1,085,175	^(c)
Royal Bank of Scotland Group PLC, Junior Subordinated Bonds		7.648	%		9/30/31		710,000		903,475	^(b)(c)
Royal Bank of Scotland Group PLC, Senior Notes		6.400	%		10/21/19		1,170,000		1,337,674
Royal Bank of Scotland Group PLC, Subordinated Notes		6.100	%		6/10/23		1,540,000		1,681,392
Royal Bank of Scotland Group PLC, Subordinated Notes		6.000	%		12/19/23		150,000		163,404
Royal Bank of Scotland NV, Subordinated Bonds		7.750	%		5/15/23		820,000		976,444
Societe Generale SA, Junior Subordinated Notes		6.000	%		1/27/20		340,000		325,550	^(a)(b)(c)
Standard Chartered PLC, Subordinated Notes		5.700	%		3/26/44		410,000		449,557	^(a)
Wachovia Capital Trust III, Junior Subordinated Bonds		5.570	%		7/10/15		410,000		406,720	^(b)(c)

See Notes to Financial Statements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		7

Schedule of investments (unaudited) (cont’d)

May 31, 2015

Western Asset Investment Grade Defined Opportunity Trust Inc.


Security	Rate			Maturity Date		Face Amount		Value
Banks — continued
Wachovia Corp., Senior Notes		5.750	%		2/1/18	$	4,400,000	$	4,891,797
Wells Fargo & Co., Junior Subordinated Bonds		5.900	%		6/15/24		560,000		578,200	^(b)(c)
Wells Fargo & Co., Junior Subordinated Bonds		5.875	%		6/15/25		300,000		315,750	^(b)(c)
Total Banks									35,389,424
Capital Markets — 9.4%
Bear Stearns Cos. LLC, Senior Notes		7.250	%		2/1/18		1,570,000		1,794,083
Credit Suisse Group AG, Junior Subordinated Notes		6.250	%		12/18/24		1,540,000		1,515,745	^(a)(b)(c)
Credit Suisse Group Funding Guernsey Ltd., Senior Notes		4.875	%		5/15/45		1,380,000		1,403,757	^(a)
Goldman Sachs Group Inc., Senior Notes		5.950	%		1/18/18		4,250,000		4,699,323
Goldman Sachs Group Inc., Senior Notes		7.500	%		2/15/19		500,000		592,781
Goldman Sachs Group Inc., Senior Notes		6.250	%		2/1/41		2,550,000		3,170,188
Goldman Sachs Group Inc., Subordinated Notes		5.150	%		5/22/45		70,000		71,715
KKR Group Finance Co. III LLC, Senior Bonds		5.125	%		6/1/44		1,340,000		1,360,909	^(a)
Merrill Lynch & Co. Inc., Notes		6.875	%		4/25/18		990,000		1,128,436
Merrill Lynch & Co. Inc., Subordinated Notes		7.750	%		5/14/38		670,000		920,800
Morgan Stanley, Medium-Term Notes		6.625	%		4/1/18		1,750,000		1,980,839
Morgan Stanley, Senior Notes		5.500	%		1/26/20		1,950,000		2,202,882
Morgan Stanley, Senior Notes		6.375	%		7/24/42		140,000		178,769
UBS AG Stamford CT, Subordinated Notes		7.625	%		8/17/22		330,000		393,578
Total Capital Markets									21,413,805
Consumer Finance — 1.7%
HSBC Finance Corp., Senior Notes		6.676	%		1/15/21		1,620,000		1,908,757
Navient Corp., Senior Notes		7.250	%		1/25/22		1,430,000		1,547,231
Navient Corp., Senior Notes		6.125	%		3/25/24		480,000		468,000
Total Consumer Finance									3,923,988
Diversified Financial Services — 5.5%
Argos Merger Sub Inc., Senior Notes		7.125	%		3/15/23		400,000		425,000	^(a)
Blackstone Holdings Finance Co., LLC, Senior Notes		4.450	%		7/15/45		310,000		296,969	^(a)
Carlyle Holdings II Finance LLC, Senior Secured Notes		5.625	%		3/30/43		360,000		397,984	^(a)
CME Group Inc., Senior Notes		5.300	%		9/15/43		750,000		885,662
General Electric Capital Corp., Junior Subordinated Bonds		7.125	%		6/15/22		100,000		117,000	^(b)(c)
General Electric Capital Corp., Junior Subordinated Bonds		6.250	%		12/15/22		1,000,000		1,118,437	^(b)(c)
General Electric Capital Corp., Senior Notes		6.875	%		1/10/39		2,820,000		3,957,757
General Electric Capital Corp., Subordinated Debentures		6.375	%		11/15/67		210,000		229,425	^(b)
General Electric Capital Corp., Subordinated Notes		5.300	%		2/11/21		130,000		149,676
ILFC E-Capital Trust I, Junior Subordinated Notes		4.090	%		12/21/65		800,000		782,000	^(a)(b)
International Lease Finance Corp., Senior Notes		8.875	%		9/1/17		810,000		919,350
International Lease Finance Corp., Senior Notes		6.250	%		5/15/19		220,000		244,750

See Notes to Financial Statements.


8		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.


Security	Rate			Maturity Date		Face Amount		Value
Diversified Financial Services — continued
International Lease Finance Corp., Senior Notes		8.250	%		12/15/20	$	330,000	$	401,775
International Lease Finance Corp., Senior Secured Notes		6.750	%		9/1/16		670,000		709,781	^(a)
International Lease Finance Corp., Senior Secured Notes		7.125	%		9/1/18		1,200,000		1,353,000	^(a)
ZFS Finance USA Trust II, Bonds		6.450	%		12/15/65		500,000		520,000	^(a)(b)
Total Diversified Financial Services									12,508,566
Insurance — 4.2%
American Equity Investment Life Holding Co., Senior Notes		6.625	%		7/15/21		90,000		96,300
American International Group Inc., Senior Notes		6.400	%		12/15/20		1,000,000		1,196,694
Aon PLC, Senior Notes		4.750	%		5/15/45		160,000		163,503
Delphi Financial Group Inc., Senior Notes		7.875	%		1/31/20		290,000		346,893
Fidelity & Guaranty Life Holdings Inc., Senior Notes		6.375	%		4/1/21		330,000		345,675	^(a)
Liberty Mutual Group Inc., Junior Subordinated Bonds		7.800	%		3/7/87		330,000		400,950	^(a)
Liberty Mutual Insurance Co., Subordinated Notes		7.875	%		10/15/26		840,000		1,052,727	^(a)
MetLife Inc., Junior Subordinated Bonds		5.250	%		6/15/20		1,140,000		1,144,275	^(b)(c)
MetLife Inc., Senior Notes		6.817	%		8/15/18		1,300,000		1,508,179
Nationwide Mutual Insurance Co., Notes		9.375	%		8/15/39		520,000		808,088	^(a)
Teachers Insurance & Annuity Association of America, Subordinated Notes		4.900	%		9/15/44		660,000		708,709	^(a)
Teachers Insurance & Annuity Association of America — College Retirement Equity Fund, Notes		6.850	%		12/16/39		1,050,000		1,396,440	^(a)
Travelers Cos. Inc., Senior Notes		6.250	%		6/15/37		400,000		525,963
Total Insurance									9,694,396
Real Estate Management & Development — 0.4%
Communications Sales & Leasing Inc., Senior Notes		8.250	%		10/15/23		180,000		184,050	^(a)
Communications Sales & Leasing Inc., Senior Secured Notes		6.000	%		4/15/23		90,000		90,675	^(a)
Security Capital Group Inc., Senior Notes		7.700	%		6/15/28		460,000		627,863
Total Real Estate Management & Development									902,588
Thrifts & Mortgage Finance — 0.1%
Quicken Loans Inc., Senior Notes		5.750	%		5/1/25		240,000		240,900	^(a)
Total Financials									84,073,667
Health Care — 4.1%
Biotechnology — 1.1%
Amgen Inc., Senior Notes		5.150	%		11/15/41		700,000		752,261
Celgene Corp., Senior Notes		3.625	%		5/15/24		560,000		574,240
Gilead Sciences Inc., Senior Notes		5.650	%		12/1/41		100,000		119,744
Gilead Sciences Inc., Senior Notes		4.500	%		2/1/45		970,000		993,569
Total Biotechnology									2,439,814

See Notes to Financial Statements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		9

Schedule of investments (unaudited) (cont’d)

May 31, 2015

Western Asset Investment Grade Defined Opportunity Trust Inc.


Security	Rate			Maturity Date		Face Amount		Value
Health Care Providers & Services — 0.5%
Catholic Health Initiatives, Secured Bonds		4.350	%		11/1/42	$	60,000	$	56,718
Humana Inc., Senior Notes		7.200	%		6/15/18		1,000,000		1,153,669
Total Health Care Providers & Services									1,210,387
Pharmaceuticals — 2.5%
AbbVie Inc., Senior Notes		4.400	%		11/6/42		450,000		438,684
AbbVie Inc., Senior Subordinated Notes		4.500	%		5/14/35		1,150,000		1,161,680
AbbVie Inc., Senior Subordinated Notes		4.700	%		5/14/45		700,000		714,470
Actavis Funding SCS, Senior Notes		4.550	%		3/15/35		790,000		785,723
Actavis Funding SCS, Senior Notes		4.750	%		3/15/45		180,000		178,952
Pfizer Inc., Senior Notes		7.200	%		3/15/39		560,000		795,912
Wyeth, Notes		5.950	%		4/1/37		1,100,000		1,354,997
Zoetis Inc., Senior Notes		4.700	%		2/1/43		270,000		266,630
Total Pharmaceuticals									5,697,048
Total Health Care									9,347,249
Industrials — 4.1%
Aerospace & Defense — 0.4%
Exelis Inc., Senior Notes		5.550	%		10/1/21		885,000		995,459
Air Freight & Logistics — 0.4%
United Parcel Service Inc., Senior Notes		6.200	%		1/15/38		700,000		905,346
Airlines — 1.7%
Air Canada, Pass-Through Trust, Secured Notes		6.625	%		5/15/18		480,000		507,600	^(a)
American Airlines, Pass-Through Trust, Senior Secured Bonds		5.600	%		1/15/22		486,218		506,883	^(a)
Delta Air Lines Inc., Pass-Through Certificates, Secured Notes		8.021	%		2/10/24		141,353		163,969
Delta Air Lines Inc., Pass-Through Certificates, Senior Secured Notes		7.750	%		6/17/21		468,544		537,654
United Airlines Inc., Pass-Through Certificates		6.545	%		8/2/20		168,908		183,265
United Airlines Inc., Pass-Through Certificates, Secured Notes		9.750	%		7/15/18		118,719		129,701
United Airlines Inc., Pass-Through Certificates, Secured Notes		9.250	%		11/10/18		190,570		209,627
United Airlines Inc., Pass-Through Certificates, Secured Notes		6.250	%		10/11/21		231,215		247,400
United Airlines Inc., Pass-Through Certificates, Senior Secured Notes		10.400	%		5/1/18		55,147		60,662
United Airlines Inc., Pass-Through Certificates, Senior Secured Notes		7.250	%		5/10/21		605,759		701,166
US Airways, Pass-Through Trust, Senior Secured Bonds		5.900	%		4/1/26		525,887		594,252
Total Airlines									3,842,179
Commercial Services & Supplies — 0.8%
Republic Services Inc., Senior Notes		5.500	%		9/15/19		220,000		248,910
Taylor Morrison Communities Inc./Monarch Communities Inc., Senior Notes		5.250	%		4/15/21		900,000		909,000	^(a)

See Notes to Financial Statements.


10		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.


Security	Rate			Maturity Date		Face Amount		Value
Commercial Services & Supplies — continued
Waste Management Inc., Senior Notes		7.750	%		5/15/32	$	500,000	$	730,468
Total Commercial Services & Supplies									1,888,378
Machinery — 0.3%
Caterpillar Inc., Senior Notes		4.750	%		5/15/64		360,000		374,649
Valmont Industries Inc., Senior Notes		6.625	%		4/20/20		180,000		209,653
Total Machinery									584,302
Road & Rail — 0.5%
Burlington Northern Santa Fe LLC, Senior Notes		4.900	%		4/1/44		760,000		828,886
CSX Corp., Senior Notes		3.950	%		5/1/50		300,000		278,577
Florida East Coast Holdings Corp., Senior Notes		9.750	%		5/1/20		70,000		67,025	^(a)
Total Road & Rail									1,174,488
Total Industrials									9,390,152
Information Technology — 1.2%
Communications Equipment — 0.7%
Harris Corp., Senior Notes		4.854	%		4/27/35		430,000		425,253
Harris Corp., Senior Notes		5.054	%		4/27/45		340,000		339,076
QUALCOMM Inc., Senior Subordinated Notes		4.800	%		5/20/45		910,000		909,779
Total Communications Equipment									1,674,108
Electronic Equipment, Instruments & Components — 0.2%
Interface Security Systems Holdings Inc./Interface Security Systems LLC, Senior Secured Notes		9.250	%		1/15/18		340,000		345,100
IT Services — 0.0%
First Data Corp., Senior Secured Notes		6.750	%		11/1/20		91,000		97,370	^(a)
Semiconductors & Semiconductor Equipment — 0.2%
National Semiconductor Corp., Senior Notes		6.600	%		6/15/17		360,000		400,297
Software — 0.1%
Activision Blizzard Inc., Senior Notes		6.125	%		9/15/23		180,000		198,900	^(a)
Total Information Technology									2,715,775
Materials — 4.3%
Chemicals — 0.2%
Ecolab Inc., Senior Notes		5.500	%		12/8/41		260,000		301,290
Metals & Mining — 3.9%
Alcoa Inc., Senior Notes		5.125	%		10/1/24		520,000		557,700
Barrick Gold Corp., Senior Notes		5.250	%		4/1/42		1,200,000		1,118,135
Freeport-McMoRan Inc., Senior Notes		5.400	%		11/14/34		20,000		18,015
Freeport-McMoRan Inc., Senior Notes		5.450	%		3/15/43		210,000		183,697
Glencore Finance Canada Ltd., Senior Bonds		5.800	%		11/15/16		1,200,000		1,271,531	^(a)
Rio Tinto Finance USA Ltd., Senior Notes		9.000	%		5/1/19		2,000,000		2,520,298

See Notes to Financial Statements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		11

Schedule of investments (unaudited) (cont’d)

May 31, 2015

Western Asset Investment Grade Defined Opportunity Trust Inc.


Security	Rate			Maturity Date		Face Amount		Value
Metals & Mining — continued
Southern Copper Corp., Senior Notes		5.375	%		4/16/20	$	260,000	$	287,560
Steel Dynamics Inc., Senior Notes		6.125	%		8/15/19		240,000		257,400
Vale Overseas Ltd., Senior Notes		6.875	%		11/21/36		2,100,000		2,075,619
Vedanta Resources PLC, Senior Notes		6.000	%		1/31/19		500,000		470,000	^(a)
Yamana Gold Inc., Senior Notes		4.950	%		7/15/24		140,000		138,509
Total Metals & Mining									8,898,464
Paper & Forest Products — 0.2%
Fibria Overseas Finance Ltd., Senior Notes		5.250	%		5/12/24		510,000		529,176
Total Materials									9,728,930
Telecommunication Services — 9.2%
Diversified Telecommunication Services — 7.7%
AT&T Inc., Global Notes		5.600	%		5/15/18		1,500,000		1,664,082
AT&T Inc., Senior Notes		4.500	%		5/15/35		370,000		351,889
AT&T Inc., Senior Notes		5.550	%		8/15/41		440,000		467,655
AT&T Inc., Senior Notes		4.750	%		5/15/46		460,000		439,772
British Telecommunications PLC, Bonds		9.625	%		12/15/30		2,000,000		3,158,820
Embarq Corp., Notes		7.995	%		6/1/36		1,500,000		1,725,000
Intelsat Jackson Holdings SA, Senior Bonds		5.500	%		8/1/23		1,250,000		1,152,737
Koninklijke KPN NV, Senior Notes		8.375	%		10/1/30		330,000		469,041
Telecom Italia Capital SA, Senior Notes		7.175	%		6/18/19		610,000		693,113
Telecom Italia SpA, Senior Notes		5.303	%		5/30/24		830,000		866,312	^(a)
Telefonica Emisiones SAU, Senior Notes		7.045	%		6/20/36		140,000		181,646
Turk Telekomunikasyon AS, Senior Notes		4.875	%		6/19/24		400,000		400,504	^(a)
Verizon Communications Inc., Senior Notes		5.150	%		9/15/23		2,460,000		2,752,041
Verizon Communications Inc., Senior Notes		6.550	%		9/15/43		1,473,000		1,795,586
Verizon Communications Inc., Senior Notes		5.012	%		8/21/54		1,508,000		1,439,715
Total Diversified Telecommunication Services									17,557,913
Wireless Telecommunication Services — 1.5%
America Movil SAB de CV, Senior Notes		4.375	%		7/16/42		800,000		777,184
Rogers Communications Inc., Senior Notes		6.800	%		8/15/18		1,000,000		1,154,509
Sprint Communications Inc., Senior Notes		9.000	%		11/15/18		280,000		321,650	^(a)
Sprint Corp., Senior Notes		7.875	%		9/15/23		700,000		713,580
Telefonica Europe BV, Senior Notes		8.250	%		9/15/30		390,000		547,818
Total Wireless Telecommunication Services									3,514,741
Total Telecommunication Services									21,072,654
Utilities — 7.0%
Electric Utilities — 5.6%
Berkshire Hathaway Energy Co., Bonds		6.125	%		4/1/36		1,000,000		1,216,356

See Notes to Financial Statements.


12		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report

Western Asset Investment Grade Defined Opportunity Trust Inc.


Security	Rate			Maturity Date		Face Amount		Value
Electric Utilities — continued
Berkshire Hathaway Energy Co., Senior Notes		5.750	%		4/1/18	$	1,000,000	$	1,113,764
CenterPoint Energy Houston Electric LLC, Senior Secured Bonds		4.500	%		4/1/44		530,000		567,023
Commonwealth Edison Co., First Mortgage Bonds		5.800	%		3/15/18		600,000		670,983
Commonwealth Edison Co., First Mortgage Bonds		6.450	%		1/15/38		600,000		797,813
FirstEnergy Corp., Notes		7.375	%		11/15/31		3,040,000		3,834,565
GenOn REMA LLC, Pass-Through Certificates		9.681	%		7/2/26		2,000,000		2,170,000
IPALCO Enterprises Inc., Senior Secured Notes		7.250	%		4/1/16		1,030,000		1,078,925	^(a)
Pacific Gas & Electric Co., Senior Notes		8.250	%		10/15/18		600,000		723,727
Virginia Electric and Power Co., Senior Notes		8.875	%		11/15/38		500,000		801,542
Total Electric Utilities									12,974,698
Gas Utilities — 0.8%
Southern Natural Gas Co., Senior Notes		8.000	%		3/1/32		1,500,000		1,833,143
Independent Power and Renewable Electricity Producers — 0.6%
AES Corp., Senior Notes		8.000	%		6/1/20		1,100,000		1,292,500
Total Utilities									16,100,341
Total Corporate Bonds & Notes (Cost — $192,761,098)									215,772,696
Municipal Bonds — 0.5%
Alabama — 0.1%
Jefferson County, AL, Sewer Revenue, Subordinated Lien Warrants		6.000	%		10/1/42		310,000		345,709
California — 0.1%
University of California Revenue		4.062	%		5/15/33		220,000		222,112
Illinois — 0.3%
Chicago, IL, GO, Taxable Project		7.781	%		1/1/35		20,000		20,985
Illinois State, GO, Build America Bonds-Taxable		6.725	%		4/1/35		530,000		558,069
Total Illinois									579,054
Total Municipal Bonds (Cost — $1,143,794)									1,146,875
Senior Loans — 0.3%
Industrials — 0.3%
Commercial Services & Supplies — 0.3%
Nielsen Finance LLC, USD Term Loan B2 (Cost — $636,801)		3.182	%		4/15/21		636,801		640,440	^(d)(e)
Sovereign Bonds — 0.9%
Colombia — 0.2%
Republic of Colombia, Senior Bonds		5.625	%		2/26/44		431,000		466,558
Turkey — 0.7%
Republic of Turkey, Senior Bonds		4.250	%		4/14/26		720,000		699,444
Republic of Turkey, Senior Notes		4.875	%		4/16/43		840,000		803,779
Total Turkey									1,503,223
Total Sovereign Bonds (Cost — $1,895,884)									1,969,781

See Notes to Financial Statements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		13

Schedule of investments (unaudited) (cont’d)

May 31, 2015

Western Asset Investment Grade Defined Opportunity Trust Inc.

Security

Rate

Maturity
Date

Face
Amount

Value

U.S. Government & Agency Obligations — 0.3%

U.S. Government Obligations — 0.3%

U.S. Treasury Bonds

2.500

2/15/45

20,000

18,544

U.S. Treasury Notes

2.125

5/15/25

780,000

782,376

Total U.S. Government & Agency Obligations (Cost — $790,295)

800,920

Common Stocks — 0.7%

Financials — 0.7%

Banks — 0.7%

Citigroup Inc. (Cost — $1,474,006)

29,728

1,607,690

Preferred Stocks — 1.6%

Financials — 1.6%

Banks — 0.0%

U.S. Bancorp

5.150

3,585

89,625

Capital Markets — 0.2%

State Street Corp.

5.900

16,755

440,154

^(b)

Consumer Finance — 1.2%

GMAC Capital Trust I

8.125

105,800

2,757,148

^(b)

Diversified Financial Services — 0.2%

Citigroup Capital XIII

7.875

17,525

455,475

^(b)

Total Preferred Stocks (Cost — $3,526,533)

3,742,402

Total Investments — 98.5% (Cost — $202,228,411#)

225,680,804

Other Assets in Excess of Liabilities — 1.5%

3,456,260

Total Net Assets — 100.0%

229,137,064

^(a)

Security is exempt from registration under Rule 144A of the Securities Act of 1933. This security may be resold in transactions 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, unless otherwise noted.

^(b)	Variable rate security. Interest rate disclosed is as of the most recent information available.

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

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

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

#	Aggregate cost for federal income tax purposes is substantially the same.


Abbreviation used in this schedule:
GO		— General Obligation

See Notes to Financial Statements.


14		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report

Statement of assets and liabilities (unaudited)

May 31, 2015



Assets:
Investments, at value (Cost — $202,228,411)	$	225,680,804
Cash		1,268,930
Interest and dividends receivable		3,140,163
Deposits with brokers for open futures contracts		355,867
Unrealized appreciation on forward foreign currency contracts		291,730
Deposits with brokers for centrally cleared swap contracts		198,964
Prepaid expenses		17,087
*Total Assets*		*230,953,545*

Liabilities:
Payable for securities purchased		1,140,000
Unrealized depreciation on forward foreign currency contracts		345,663
Investment management fee payable		126,383
OTC swaps, at value (premiums received — $41,277)		70,283
Payable to broker — variation margin on open futures contracts		58,703
Payable to broker — variation margin on centrally cleared swaps		14,265
Payable for open OTC swap contracts		5,549
Accrued expenses		55,635
*Total Liabilities*		*1,816,481*
Total Net Assets	$	229,137,064

Net Assets:
Par value ($0.001 par value; 10,769,985 shares issued and outstanding; 100,000,000 shares authorized)	$	10,770
Paid-in capital in excess of par value		205,213,656
Undistributed net investment income		1,747,654
Accumulated net realized loss on investments, futures contracts, swap contracts and foreign currency transactions		(980,012)
Net unrealized appreciation on investments, futures contracts, swap contracts and foreign currencies		23,144,996
Total Net Assets	$	229,137,064

Shares Outstanding		10,769,985

Net Asset Value		$21.28

See Notes to Financial Statements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		15

Statement of operations (unaudited)

For the Six Months Ended May 31, 2015



Investment Income:
Interest	$	6,043,918
Dividends		157,091
*Total Investment Income*		*6,201,009*

Expenses:
Investment management fee (Note 2)		752,232
Excise tax (Note 1)		108,644
Audit and tax fees		29,005
Directors’ fees		23,073
Transfer agent fees		18,326
Shareholder reports		14,508
Legal fees		12,715
Fund accounting fees		11,623
Stock exchange listing fees		10,596
Insurance		2,335
Custody fees		1,129
Miscellaneous expenses		6,254
*Total Expenses*		*990,440*
Net Investment Income		5,210,569

Realized and Unrealized Gain (Loss) on Investments, Futures Contracts, Swap Contracts and Foreign Currency Transactions (Notes 1, 3 and 4):
Net Realized Gain (Loss) From:
Investment transactions		764,799
Futures contracts		(831,929)
Swap contracts		(21,315)
Foreign currency transactions		537,178
*Net Realized Gain*		*448,733*
Change in Net Unrealized Appreciation (Depreciation) From:
Investments		(2,902,320)
Futures contracts		113,702
Swap contracts		79,210
Foreign currencies		(192,751)
*Change in Net Unrealized Appreciation (Depreciation)*		*(2,902,159)*
Net Loss on Investments, Futures Contracts, Swap Contracts and Foreign Currency Transactions		(2,453,426)
Increase in Net Assets from Operations	$	2,757,143

See Notes to Financial Statements.


16		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report

Statements of changes in net assets


For the Six Months Ended May 31, 2015 (unaudited) and the Year Ended November 30, 2014	2015		2014

Operations:
Net investment income	$	5,210,569	$	10,932,640
Net realized gain		448,733		617,636
Change in net unrealized appreciation (depreciation)		(2,902,159)		5,668,527
*Increase in Net Assets from Operations*		*2,757,143*		*17,218,803*

Distributions to Shareholders From (Note 1):
Net investment income		(6,459,639)		(12,230,725)
Net realized gains		—		(4,018,067)
*Decrease in Net Assets from Distributions to Shareholders*		*(6,459,639)*		*(16,248,792)*

Fund Share Transactions:
Reinvestment of distributions (6,344 and 0 shares issued, respectively)		133,374		—
*Increase in Net Assets from Fund Share Transactions*		*133,374*		—
*Increase (Decrease) in Net Assets*		*(3,569,122)*		*970,011*

Net Assets:
Beginning of period		232,706,186		231,736,175
End of period*	$	229,137,064	$	232,706,186
*Includes undistributed net investment income of:		$1,747,654		$2,996,724

See Notes to Financial Statements.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		17

Financial highlights


For a share of capital stock outstanding throughout each year ended November 30, unless otherwise noted:
	2015^1,2			2014¹			2013¹			2012¹			2011¹			2010¹

Net asset value, beginning of period		$21.62			$21.53			$22.67			$20.64			$21.35			$20.58

Income (loss) from operations:
Net investment income		0.48			1.02			1.03			1.09			1.15			1.17
Net realized and unrealized gain (loss)		(0.22)			0.58			(0.90)			2.33			(0.57)			0.85
*Total income from operations*		*0.26*			*1.60*			*0.13*			*3.42*			*0.58*			*2.02*

Less distributions from:
Net investment income		(0.60)	³		(1.14)			(0.94)			(1.25)			(1.07)			(1.17)
Net realized gains		—			(0.37)			(0.33)			(0.14)			(0.22)			(0.08)
*Total distributions*		*(0.60)*			*(1.51)*			*(1.27)*			*(1.39)*			*(1.29)*			*(1.25)*

Net asset value, end of period		$21.28			$21.62			$21.53			$22.67			$20.64			$21.35

Market price, end of period		$21.00			$20.87			$19.59			$23.69			$21.55			$20.79
*Total return, based on NAV^4,5*		*1.21*	%		*7.70*	%		*0.63*	%		*17.12*	%		*2.96*	%		*10.28*	%
*Total return, based on Market Price⁶*		*3.53*	%		*14.69*	%		*(12.18)*	%		*17.28*	%		*10.40*	%		*12.52*	%

Net assets, end of period (000s)		$229,137			$232,706			$231,736			$243,472			$220,354			$227,337

Ratios to average net assets:
Gross expenses		0.86	%⁷		0.80	%		0.84	%		0.78	%		0.80	%		0.81	%
Net expenses		0.86	⁷		0.80			0.84			0.78			0.80			0.81
Net investment income		4.50	⁷		4.69			4.69			5.01			5.43			5.60

Portfolio turnover rate		26	%		38	%		68	%		82	%		49	%		31	%

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

²	For the six months ended May 31, 2015 (unaudited).

³	The actual source of the Fund’s current fiscal year distributions may be from net investment income, return of capital 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 reimbursements. In the absence of compensating balance arrangements, fee waivers and/or expense reimbursements, 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. Prior to January 1, 2012, the total return calculation assumed the reinvestment of all distributions in accordance with the Fund’s dividend reinvestment plan. Past performance is no guarantee of future results. 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 Fund’s dividend reinvestment plan. Past performance is no guarantee of future results. Total returns for periods of less than one year are not annualized.

⁷	Annualized.

See Notes to Financial Statements.


18		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 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 April 24, 2009 and is registered as a non-diversified, closed-end management investment company under the Investment Company Act of 1940, as amended (the “1940 Act”). The Fund’s primary investment objective is to provide current income and then to liquidate and distribute substantially all of the Fund’s net assets to stockholders on or about December 2, 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 following are significant accounting policies consistently followed by the Fund and are in conformity with U.S. generally accepted accounting principles (“GAAP”). 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 the economic 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 (which may 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 party pricing services, which may use market prices or broker/dealer quotations or a variety of valuation techniques and methodologies. The independent third party pricing services use inputs that are observable such as issuer details, interest rates, yield curves, prepayment speeds, credit risks/spreads, default rates and quoted prices for similar securities. Short-term fixed income securities that will mature in 60 days or less are valued at amortized cost, unless it is determined that using this method would not reflect an investment’s fair value. Futures contracts 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 closing price 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). If independent 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 or more 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 a security 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 asset value, the Fund values these securities as determined in accordance with procedures approved by the Fund’s Board of Directors.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		19

Notes to financial statements (unaudited) (cont’d)

The Board of Directors is responsible for the valuation process and has delegated the supervision of the daily valuation process to the Legg Mason North Atlantic Fund Valuation Committee (formerly, Legg Mason North American Fund Valuation Committee) (the “Valuation Committee”). The Valuation Committee, pursuant to the policies adopted by the Board of Directors, is responsible for making fair value determinations, evaluating the effectiveness of the Fund’s pricing policies, and reporting to the Board of Directors. When determining the reliability of third party pricing information for investments owned by the Fund, 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 methodologies include, 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 fundamental investment analysis. The Valuation Committee will also consider factors it deems relevant and appropriate in light of the facts and circumstances. Examples of possible factors include, but are not limited to, the type of security; the issuer’s financial 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; information regarding 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 the existence of a shelf registration for restricted securities.

For each portfolio security that has been fair valued pursuant to the policies adopted by the Board of Directors, 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 of Directors quarterly.

The Fund uses valuation techniques to measure fair value that are consistent with the market approach and/or income approach, depending on the type of security and the particular circumstance. 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 discount estimated future cash flows to present value.

GAAP establishes a disclosure hierarchy that categorizes 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 — 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.)


20		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report

Level 3 — significant unobservable inputs (including the Fund’s own assumptions in determining the fair value of investments)

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

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


ASSETS
Description	Quoted Prices (Level 1)		Other Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Long-term investments†:
Corporate bonds & notes:
Industrials		—	$	6,055,573	$	3,334,579	$	9,390,152
Utilities		—		13,930,341		2,170,000		16,100,341
Other corporate bonds & notes		—		190,282,203		—		190,282,203
Municipal bonds		—		1,146,875		—		1,146,875
Senior loans		—		640,440		—		640,440
Sovereign bonds		—		1,969,781		—		1,969,781
U.S. government & agency obligations		—		800,920		—		800,920
Common stocks	$	1,607,690		—		—		1,607,690
Preferred stocks		3,742,402		—		—		3,742,402
Total investments	$	5,350,092	$	214,826,133	$	5,504,579	$	225,680,804
Other financial instruments:
Futures contracts	$	70,408		—		—	$	70,408
Forward foreign currency contracts		—	$	291,730		—		291,730
Centrally cleared interest rate swaps		—		77,794		—		77,794
Total other financial instruments	$	70,408	$	369,524		—	$	439,932
Total	$	5,420,500	$	215,195,657	$	5,504,579	$	226,120,736

LIABILITIES
Description	Quoted Prices (Level 1)		Other Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Other financial instruments:
Futures contracts	$	372,660		—		—	$	372,660
Forward foreign currency contracts		—	$	345,663		—		345,663
OTC credit default swaps on corporate issues — buy protection‡		—		70,283		—		70,283
Total	$	372,660	$	415,946		—	$	788,606

†	See Schedule of Investments for additional detailed categorizations.

‡	Values include any premiums paid or received with respect to swap contracts.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		21

Notes to financial statements (unaudited) (cont’d)

The following is a reconciliation of investments in which significant unobservable inputs (Level 3) were used in determining fair value:


	Corporate Bonds & Notes
Investments in Securities	Industrials		Utilities		Total
Balance as of November 30, 2014		—		—		—
Accrued premiums/discounts		—		—		—
Realized gain (loss)		—		—		—
Change in unrealized appreciation (depreciation)		—		—		—
Purchases		—		—		—
Sales		—		—		—
Transfers into Level 3¹	$	3,334,579	$	2,170,000	$	5,504,579
Transfers out of Level 3		—		—		—
Balance as of May 31, 2015	$	3,334,579	$	2,170,000	$	5,504,579
Net change in unrealized appreciation (depreciation) for investments in securities still held at May 31, 2015		—		—		—

The Fund’s policy is to recognize transfers between levels as of the end of the reporting period.

¹	Transferred into Level 3 as a result of the unavailability of a quoted price in an active market for an identical investment or the unavailability of other significant observable inputs.

(b) Repurchase agreements. The Fund may enter into repurchase agreements with institutions that its investment adviser has determined are creditworthy. Each repurchase agreement is recorded at cost. Under the terms of a typical repurchase agreement, the Fund acquires a debt security subject to an obligation of the seller to repurchase, and of the Fund to resell, the security at an agreed-upon price and time, thereby determining the yield during the Fund’s holding period. When entering into repurchase agreements, it is the Fund’s policy that its custodian or a third party custodian, acting on the Fund’s behalf, take possession of the underlying collateral securities, the market value of which, at all times, at least equals the principal amount of the repurchase transaction, including accrued interest. To the extent that any repurchase transaction maturity exceeds one business day, the value of the collateral is marked-to-market and measured against the value of the agreement in an effort to ensure the adequacy of the collateral. If the counterparty defaults, the Fund generally has the right to use the collateral to satisfy the terms of the repurchase transaction. However, if the market value of the collateral declines during the period in which the Fund seeks to assert its rights or if bankruptcy proceedings are commenced with respect to the seller of the security, realization of the collateral by the Fund may be delayed or limited.

(c) Futures contracts. The Fund uses futures contracts generally to gain exposure 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 a specified date.

Upon entering into a futures contract, the Fund is required to deposit cash or cash equivalents with a broker in an amount equal to a certain percentage of the contract amount. This is known as the ‘‘initial margin’’ and subsequent payments (‘‘variation margin’’) are


22		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report

made or received by the Fund each day, depending on the daily fluctuation in the value 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 unrealized gains or losses 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.

(d) Forward foreign currency contracts. The Fund enters into forward foreign currency contracts 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 denominated securities 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 a future 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 forward foreign 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.

Forward foreign currency contracts involve elements of 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 upon entering into these contracts from the potential inability of the counterparties to meet the terms of their contracts.

(e) Swap agreements. The Fund invests in swaps for the purpose of managing its exposure to interest rate, credit or market risk, or for other purposes, including to increase the Fund’s return. 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-counter market (“OTC Swaps”) or may be executed on a registered exchange (“Centrally Cleared Swaps”). Unlike Centrally Cleared Swaps, the Fund has credit exposure to the counterparties of OTC Swaps.

Swap contracts are marked-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 receivable or payable for variation margin on the Statement of Assets 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 Fund’s custodian in compliance with 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.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		23

Notes to financial statements (unaudited) (cont’d)

Risks may exceed amounts recorded 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 respect to 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 the Statement 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 a realized gain or loss in the Statement of Operations.

The Fund’s maximum exposure in the event of a defined credit event on a credit default swap to sell protection is the notional amount. As of May 31, 2015, the Fund did not hold any credit default swaps to sell protection.

For average notional amounts of swaps held during the six months ended May 31, 2015, see Note 4.

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 one party 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 a write-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 has exposure to an issuer) or to take an active long or short position with respect to the likelihood of a particular issuer’s default. As a seller of protection, the Fund generally receives an upfront payment or a stream of payments throughout the term 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 credit default swap 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 referenced obligations. 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, the Fund 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 for credit 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 protection and may include upfront payments required to enter into the agreement. Wider credit spreads and decreasing market values, when compared to


24		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report

the notional amount of the swap, represent a deterioration of the referenced entity’s credit soundness and 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 credit default swap agreements on corporate or sovereign issues are disclosed in the Notes to Financial Statements 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 credit default swap agreements on asset-backed securities and credit 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 Fund’s 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 of collateral by the counterparty to the Fund to cover the Fund’s exposure to the counterparty). As the protection seller, the Fund’s maximum risk is the notional amount of the contract. Credit default swaps are considered to have credit risk-related contingent features since they require payment by the protection seller to the protection buyer upon the occurrence of a defined credit event.

Entering into a CDS agreement involves, to varying degrees, 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 the counterparty 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.

Interest rate swaps

The Fund enters into interest rate swap contracts to manage its exposure to interest rate risk. Interest rate swaps are agreements between two parties to exchange cash flows based on a notional principal amount. The Fund may elect to pay a fixed rate and receive a floating rate, or receive a fixed rate and pay a floating rate, on a notional principal amount. Interest rate swaps are marked-to-market daily based upon quotations from market makers and the change, if any, is recorded as an unrealized gain or loss in the Statement of Operations. When a swap contract is terminated early, the Fund records a realized gain or loss equal to the difference between the original cost and the settlement amount of the closing transaction.

The risks of interest rate swaps include changes in market conditions that will affect the value of the contract or changes in the present value of the future cash flow streams and the possible inability of the counterparty to fulfill its obligations under the agreement. The Fund’s maximum risk of loss from counterparty credit risk is the discounted net value of the cash flows to be received from the counterparty over the contract’s remaining life, to the extent that that amount is positive. This risk is mitigated by the posting of collateral by the counterparty to the Fund to cover the Fund’s exposure to the counterparty.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		25

Notes to financial statements (unaudited) (cont’d)

Total return swaps

The Fund enters into total return swaps for investment purposes. Total return swaps are agreements to exchange the return generated by one instrument for the return generated by another instrument. For example, the agreement to pay a predetermined or fixed interest rate in exchange for a market-linked return based on a notional amount. To the extent the total return of a referenced index or instrument exceeds the offsetting interest obligation, the Fund will receive a payment from the counterparty. To the extent it is less, the Fund will make a payment to the counterparty.

(f) Loan participations. The Fund may invest in loans arranged through private negotiation between one or more financial institutions. The Fund’s 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 will have 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 has purchased the participation.

The Fund assumes the credit risk of the borrower, the lender that is selling the participation and any other persons interpositioned 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 the borrower.

(g) Credit and market risk. The Fund invests in high-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 Fund’s investments in securities rated below investment grade typically 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.

(h) Foreign investment risks. The Fund’s investments in foreign securities may involve risks not present in domestic investments. Since securities may be denominated in foreign currencies, may require settlement in foreign currencies or pay interest or dividends in foreign currencies, changes in the relationship 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.

(i) Counterparty risk and credit-risk-related contingent features of derivative instruments. The Fund may invest in certain securities or engage in other transactions, 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 may increase the risk of loss in the event of default or bankruptcy by the counterparty or if the counterparty otherwise fails to meet its


26		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report

contractual obligations. The Fund’s investment manager 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 the counterparty for certain transactions. Market events and changes in overall economic conditions may impact the assessment of such counterparty risk by the investment manager. In addition, declines in the values of underlying collateral received may expose the Fund to increased risk of loss.

The Fund has entered into master agreements with certain of its derivative counterparties that provide for general obligations, representations, agreements, collateral, events 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 Fund’s net assets or NAV over a specified 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.

Collateral requirements differ by type of derivative. Collateral or margin requirements are set by the broker or exchange clearing house for exchange traded derivatives while collateral terms are contract specific for over-the-counter 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 and Liabilities. Securities pledged as collateral, if any, for the same purpose are noted in the Schedule of Investments.

Absent an event of default by the counterparty or a termination of the agreement, the terms of the master agreements do not result in an offset of reported 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.

As of May 31, 2015, the Fund held forward foreign currency contracts and OTC credit default swaps with credit related contingent features which had a liability position of $415,946. If a contingent feature in the master agreements would have been triggered, the Fund would have been required to pay this amount to its derivatives counterparties.

(j) Foreign currency translation. Investment securities and other assets and 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 foreign currencies are translated into U.S. dollar amounts based upon prevailing exchange rates on the respective dates of such transactions.

The Fund does not isolate 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 net realized and unrealized gain or loss on investments.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		27

Notes to financial statements (unaudited) (cont’d)

Net realized foreign exchange gains or losses arise from sales of foreign currencies, including gains and losses on forward foreign currency contracts, currency gains or losses realized between the trade and settlement dates on securities transactions, and the difference between the amounts of dividends, interest, and foreign withholding taxes recorded on the Fund’s 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 the date of valuation, resulting from changes in exchange rates.

Foreign security and currency transactions may involve certain considerations and risks not typically associated 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 economic instability.

(k) Security transactions and investment income. Security transactions are accounted for on a trade date basis. Interest income, adjusted for amortization of premium and accretion of discount, is recorded on the accrual basis. Dividend income is recorded on the ex-dividend date. Foreign dividend income is recorded on the ex-dividend date or as soon 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 identification method. To the extent any issuer defaults or a credit event occurs that impacts the issuer, 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 actual source of the Fund’s monthly distributions may be from net investment income, return of capital or a combination of both. Shareholders will be informed of the tax characteristics of the distributions after the close of the fiscal year. Distributions of net realized gains, if any, are declared at least annually. Distributions to shareholders 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 custodian’s fees is paid indirectly by credits earned on the Fund’s cash on deposit with the bank.

(n) Federal and other taxes. It is the Fund’s 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 Fund’s financial statements. However, due to the timing of when distributions are made by the Fund, the Fund may be subject to an excise tax of 4% of the amount by which 98% of the Fund’s annual taxable income and 98.2% of net realized gains


28		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report

exceed the distributions from such taxable income and realized gains for the calendar year. The Fund paid $108,644 of Federal excise taxes attributable to calendar year 2014 in March 2015.

Management has analyzed the Fund’s tax positions taken on income tax returns for all open tax years and has concluded that as of May 31, 2015, no provision for income tax is required in the Fund’s financial statements. The Fund’s federal and state income and federal excise tax returns for tax years for which the applicable statutes of limitations have not expired are subject to examination by the Internal Revenue Service and state departments of revenue.

Under the applicable foreign tax laws, a withholding tax may be imposed 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 Fund’s investment manager. Western Asset Management Company (“Western Asset”), Western Asset Management Company Pte. Ltd. (“Western Singapore”), Western Asset Management Company Ltd (“Western Japan”) and Western Asset Management Company Limited (“Western Asset Limited”) are the Fund’s subadvisers. LMPFA, Western Asset, Western Singapore, Western Japan and Western Asset Limited are wholly-owned subsidiaries of Legg Mason, Inc. (“Legg Mason”).

LMPFA provides administrative and certain oversight services 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 Fund’s average daily net assets.

LMPFA delegates to Western Asset the day-to-day portfolio management of the Fund. Western Singapore, Western Japan and Western Asset Limited provide certain advisory services to the Fund relating to currency transactions and investment in non-U.S. dollar denominated debt securities. For its services, LMPFA pays Western Asset 70% of the net management fee it receives from the Fund. In turn, Western Asset pays Western Singapore, Western Japan and Western Asset Limited a fee for their services at no additional expense to the Fund. Each of Western Singapore, Western Japan and Western Asset Limited receives a fee from Western Asset, payable monthly, in an amount equal to 70% of the Fund’s fee paid to LMPFA by the Fund related to the Fund’s assets that Western Asset allocates to Western Singapore, Western Japan and Western Asset Limited, respectively, to manage.

All officers and one Director of the Fund are employees of Legg Mason or its affiliates and do not receive compensation from the Fund.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		29

Notes to financial statements (unaudited) (cont’d)

3. Investments

During the six months ended May 31, 2015, 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 & Agency Obligations
Purchases	$	41,405,321	$	17,683,904
Sales		42,715,567		16,896,667

At May 31, 2015, the aggregate gross unrealized appreciation and depreciation of investments for federal income tax purposes were substantially as follows:


Gross unrealized appreciation	$	24,356,020
Gross unrealized depreciation		(903,627)
Net unrealized appreciation	$	23,452,393

At May 31, 2015, the Fund had the following open futures contracts:


	Number of Contracts		Expiration Date		Basis Value		Market Value		Unrealized Appreciation (Depreciation)
Contracts to Buy:
U.S. Treasury 5-Year Notes		21		9/15	$	2,501,365	$	2,514,258	$	12,893
U.S. Treasury Ultra Long-Term Bonds		17		9/15		2,667,266		2,724,781		57,515
										70,408
Contracts to Sell:
U.S. Treasury 10-Year Notes		106		9/15		13,414,835		13,534,875		(120,040)
U.S. Treasury Long-Term Bonds		61		9/15		9,240,505		9,493,125		(252,620)
										(372,660)
Net unrealized depreciation on open futures contracts									$	(302,252)

At May 31, 2015, the Fund had the following open forward foreign currency contracts:


Currency Purchased		Currency Sold		Counterparty	Settlement Date		Unrealized Appreciation (Depreciation)
BRL	7,340,000	USD	2,279,008	Bank of America N.A.		7/16/15	$	(10,782)
BRL	7,150,000	USD	2,293,872	Bank of America N.A.		7/16/15		(84,361)
USD	2,339,660	BRL	7,150,000	Bank of America N.A.		7/16/15		130,148
USD	687,563	BRL	2,040,000	Bank of America N.A.		7/16/15		57,157
USD	455,871	BRL	1,360,000	Bank of America N.A.		7/16/15		35,600
USD	5,314,520	EUR	4,970,000	Bank of America N.A.		7/16/15		(147,277)
USD	1,172,822	EUR	1,070,000	Bank of America N.A.		7/16/15		(3,058)
USD	1,776,144	JPY	211,780,000	Bank of America N.A.		7/16/15		68,825
INR	71,560,000	USD	1,130,624	Citibank N.A.		7/16/15		(19,996)
INR	143,010,000	USD	2,263,300	Citibank N.A.		7/16/15		(43,751)
USD	985,588	EUR	930,000	Citibank N.A.		7/16/15		(36,438)
Total							$	(53,933)


30		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report


Abbreviations used in this table:
BRL		— Brazilian Real
EUR		— Euro
INR		— Indian Rupee
JPY		— Japanese Yen
USD		— United States Dollar

At May 31, 2015, the Fund had the following open swap contracts:

CENTRALLY CLEARED INTEREST RATE SWAPS

Swap Counterparty

Notional
Amount

Termination
Date

Payments
Made by
the Fund†

Payments
Received by
the Fund†

Upfront
Premiums
Paid
(Received)

Unrealized
Appreciation

BNP Paribas

2,192,000

2/15/41

2.442% semi-annually

3-Month LIBOR

(10,191)

77,794


OTC CREDIT DEFAULT SWAPS ON CORPORATE ISSUES — BUY PROTECTION¹
Swap Counterparty (Reference Entity)	Notional Amount²		Termination Date		Implied Credit Spread at May 31, 2015³	Periodic Payments Made by the Fund†	Market Value		Upfront Premiums Paid (Received)		Unrealized Depreciation
Goldman Sachs Group Inc. (E.I. du Pont de Nemours & Co., 5.250%, due 12/15/16)	$	780,000		3/20/19	0.281%	1.000% quarterly	$	(21,084)	$	(16,909)	$	(4,175)
Goldman Sachs Group Inc. (Kinder Morgan Energy Partners LP, 3.950%, due 9/1/22)		1,100,000		12/20/18	0.352%	1.000% quarterly		(25,110)		(7,063)		(18,047)
Goldman Sachs Group Inc. (PPG Industries Inc., 6.650%, due 3/15/18)		856,423		3/20/19	0.252%	1.000% quarterly		(24,089)		(17,305)		(6,784)
Total	$	2,736,423					$	(70,283)	$	(41,277)	$	(29,006)

If the Fund is a buyer of protection and a credit event occurs, as defined under the terms of that particular swap agreement, 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 net settlement 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 of credit protection if a credit event occurs as defined under the terms of that particular swap agreement.

Implied credit spreads, utilized in determining the market value of credit default swap agreements on corporate or sovereign issues as of period end serve as an indicator of the current status of the payment/performance risk and represent the likelihood or risk of default for the credit derivative. The implied credit spread of a particular referenced entity reflects the cost of buying/selling protection and may include upfront payments required to be made to enter into the agreement. Wider credit spreads represent a deterioration of the referenced entity’s credit soundness and a greater likelihood or risk of default or other credit event occurring as defined under the terms of the agreement. A credit spread identified as “Defaulted” indicates a credit event has occurred for the referenced entity or obligation.

†	Percentage shown is an annual percentage rate.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		31

Notes to financial statements (unaudited) (cont’d)

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 and Liabilities at May 31, 2015.


ASSET DERIVATIVES¹
	Interest Rate Risk		Foreign Exchange Risk		Total
Futures contracts²	$	70,408		—	$	70,408
Centrally cleared swap contracts³		77,794		—		77,794
Forward foreign currency contracts		—	$	291,730		291,730
Total	$	148,202	$	291,730	$	439,932


LIABILITY DERIVATIVES¹
	Interest Rate Risk		Foreign Exchange Risk		Credit Risk		Total
Futures contracts²	$	372,660		—		—	$	372,660
OTC swap contracts⁴		—		—	$	70,283		70,283
Forward foreign currency contracts		—	$	345,663		—		345,663
Total	$	372,660	$	345,663	$	70,283	$	788,606

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

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

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

⁴	Values include premiums paid (received) on swap contracts which are shown separately in the Statement of Assets and Liabilities.

The following tables provide information about the effect of derivatives and hedging activities on the Fund’s Statement of Operations for the six months ended May 31, 2015. The first table provides additional detail about the amounts and sources of gains (losses) realized on derivatives during the period. The second table provides additional information about the change in unrealized appreciation (depreciation) resulting from the Fund’s derivatives and hedging activities during the period.


AMOUNT OF REALIZED GAIN (LOSS) ON DERIVATIVES RECOGNIZED
	Interest Rate Risk		Foreign Exchange Risk		Credit Risk		Equity Risk		Total
Futures contracts	$	(831,929)		—		—		—	$	(831,929)
Swap contracts		25,849		—	$	(2,803)	$	(44,361)		(21,315)
Forward foreign currency contracts¹		—	$	537,178		—		—		537,178
Total	$	(806,080)	$	537,178	$	(2,803)	$	(44,361)	$	(316,066)

¹	Net realized gain (loss) from forward foreign currency contracts is reported in net realized gain (loss) from foreign currency transactions in the Statement of Operations.


32		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report


CHANGE IN UNREALIZED APPRECIATION (DEPRECIATION) ON DERIVATIVES RECOGNIZED
	Interest Rate Risk		Foreign Exchange Risk		Credit Risk		Total
Futures contracts	$	113,702		—		—	$	113,702
Swap contracts		77,794		—	$	1,416		79,210
Forward foreign currency contracts¹		—	$	(192,751)		—		(192,751)
Total	$	191,496	$	(192,751)	$	1,416	$	161

¹	The change in unrealized appreciation (depreciation) from forward foreign currency contracts is reported in the change in net unrealized appreciation (depreciation) from foreign currencies in the Statement of Operations.


	Average Market Value
Futures contracts (to buy)	$	3,531,328
Futures contracts (to sell)		28,781,969
Forward foreign currency contracts (to buy)		4,438,504
Forward foreign currency contracts (to sell)		6,664,573

	Average Notional Balance
Interest rate swap contracts	$	2,488,857
Credit default swap contracts (to buy protection)		2,893,566
Total return swap contracts¹		685,711

¹	At May 31, 2015, there were no open positions held in this derivative.

The following table presents by financial instrument, the Fund’s derivative assets net of the related collateral received by the Fund at May 31, 2015:


	Gross Amount of Derivative Assets in the Statement of Assets and Liabilities¹		Collateral Received		Net Amount
Forward foreign currency contracts	$	291,730		—	$	291,730

The following table presents by financial instrument, the Fund’s derivative liabilities net of the related collateral pledged by the Fund at May 31, 2015:


	Gross Amount of Derivative Liabilities in the Statement of Assets and Liabilities¹		Collateral Pledged^2,3		Net Amount
Futures contracts⁴	$	58,703	$	(58,703)		—
Centrally cleared swap contracts⁴		14,265		(14,265)		—
OTC swap contracts		70,283		—	$	70,283
Forward foreign currency contracts		345,663		—		345,663
Total	$	488,914	$	(72,968)	$	415,946

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

²	Gross amounts are not offset in the Statement of Assets and Liabilities.

³	In some instances, the actual collateral received and/or pledged may be more than the amount shown here due to overcollateralization.

⁴	Amount represents the current day’s variation margin as reported in the Statement of Assets and Liabilities. It differs from the cumulative appreciation (depreciation) presented in the previous table.


Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report		33

Notes to financial statements (unaudited) (cont’d)

5. Distributions subsequent to May 31, 2015

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


Record Date	Payable Date		Amount
6/19/15		6/26/15	$	0.1000
7/24/15		7/31/15	$	0.1000
8/21/15		8/28/15	$	0.1000

6. Deferred capital losses

As of May 31, 2015, the Fund had deferred capital losses of $421,439, which have no expiration date, that will be available to offset future taxable capital gains.


34		Western Asset Investment Grade Defined Opportunity Trust Inc. 2015 Semi-Annual Report

Additional shareholder information (unaudited)

Results of annual meeting of shareholders

The Annual Meeting of Shareholders of Western Asset Investment Grade Defined Opportunity Trust Inc. was held on March 27, 2015 for the purpose of considering and voting upon the election of Directors. The following table provides information concerning the matter voted upon at the Meeting:

Election of directors


Nominees	Votes For		Votes Withheld
Robert D. Agdern		9,334,574		185,863
Eileen A. Kamerick		9,326,969		193,468
Riordan Roett		9,288,765		231,672

At May 31, 2015, in addition to Robert D. Agdern, Eileen A. Kamerick and Riordan Roett, the other Directors of the Fund were as follows:

Carol L. Colman

Daniel P. Cronin

Paolo M. Cucchi

Kenneth D. Fuller

Leslie H. Gelb

William R. Hutchinson


Western Asset Investment Grade Defined Opportunity Trust Inc.		35

Dividend reinvestment plan (unaudited)

Unless you elect to receive distributions in cash (i.e., opt-out), all dividends, including any capital gain dividends, on your Common Stock will be automatically reinvested by American Stock Transfer & Trust Company LLC, as agent for the stockholders (the “Plan Agent”), in additional shares of Common Stock under the Fund’s Dividend Reinvestment Plan (the “Plan”). 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 American Stock Transfer & Trust Company LLC, as dividend paying 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 on the record date (or, if the record date is not a NYSE trading day, the immediately preceding trading day) for determining stockholders eligible to receive the relevant dividend or distribution (the “determination date”) is equal to or exceeds 98% of the net asset value per share of the Common Stock, the Fund will issue new Common Stock at a price equal to the greater of (a) 98% of the net asset value per share at the close of trading on the NYSE on the determination date or (b) 95% of the market price per share of the Common Stock on the determination date.

(2) If 98% of the net asset value per share of the Common Stock exceeds the market price of the Common Stock on the determination 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 day following the determination date and terminating no later than the earlier of (a) 30 days after the dividend or distribution payment date, or (b) the record 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 rises so that it equals or exceeds 98% of the net asset value per share of the Common Stock at the close of trading on the NYSE on the determination 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) 98% of the net asset value per share at the close of trading on the Exchange on the determination date or (b) 95% of the then current market price per share.

Common Stock in your account will be held by the Plan 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 6201 15th Avenue, Brooklyn, New York 11219 or by calling the Plan Agent at 1-888-888-0151. Such withdrawal will be effective immediately if notice is received by the


36		Western Asset Investment Grade Defined Opportunity Trust Inc.

Plan Agent not less than ten business days prior to any dividend or distribution record date; otherwise such withdrawal will be effective as soon as practicable after the Plan Agent’s investment of the most recently declared dividend or distribution on the Common Stock. The Plan may be terminated 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 Fund for which the termination is to be effective. Upon any termination, you will be sent a certificate or certificates for the full number of shares of Common Stock held for you under the Plan and cash for any fractional share of Common Stock. You may elect to notify the Plan Agent in advance of such termination to have the Plan Agent sell part or all of your Common Stock on your behalf. You will be charged a service charge and the Plan Agent is authorized to deduct brokerage charges actually incurred for this transaction from the proceeds.

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 Common Stock, 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 the Fund’s 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. Investors will 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 of Directors, the change is warranted. There is no direct service charge to participants in the Plan; however, the Fund reserves the right to amend the Plan to include a service charge payable by the participants. Additional information about the Plan and your account may be obtained from the Plan Agent at 1-888-888-0151.


Western Asset Investment Grade Defined Opportunity Trust Inc.		37

Western Asset

Investment Grade Defined Opportunity Trust Inc.

Directors

Robert D. Agdern

Carol L. Colman

Daniel P. Cronin

Paolo M. Cucchi

Kenneth D. Fuller

Chairman

Leslie H. Gelb

William R. Hutchinson

Eileen A. Kamerick

Riordan Roett

Officers

Kenneth D. Fuller

President and Chief Executive Officer

Richard F. Sennett

Principal Financial Officer

Ted P. Becker

Chief Compliance Officer

Vanessa A. Williams

Identity Theft Prevention Officer

Robert I. Frenkel

Secretary and Chief Legal Officer

Thomas C. Mandia

Assistant Secretary

Steven Frank

Treasurer

Jeanne M. Kelly

Senior Vice President

Western Asset Investment Grade Defined Opportunity Trust Inc.

620 Eighth Avenue 49th Floor New York, NY 10018

Investment manager

Legg Mason Partners Fund Advisor, LLC

Subadvisers

Western Asset Management Company

Western Asset Management Company Limited

Western Asset Management Company Ltd

Western Asset Management Company Pte. Ltd.

Custodian

State Street Bank and Trust Company

1 Lincoln Street Boston, MA 02111

Transfer agent

American Stock Transfer & Trust Company 6201 15th Avenue Brooklyn, NY 11219

Independent registered public accounting firm

KPMG LLP 345 Park Avenue New York, NY 10154

Legal counsel

Simpson Thacher & Bartlett LLP 425 Lexington Avenue New York, NY 10017

New York Stock Exchange Symbol

IGI

Legg Mason Funds Privacy and Security Notice

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

This Privacy and Security Notice (the “Privacy Notice”) addresses the Legg Mason Funds’ privacy and data protection practices with respect to nonpublic personal information the Funds receive. The Legg Mason Funds include any funds sold by the Funds’ distributor, Legg Mason Investor Services, LLC, as well as Legg Mason-sponsored closed-end funds and certain closed-ends funds managed or sub-advised by Legg Mason or its affiliates. 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 your shareholder 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;

Online account access user IDs, passwords, security challenge question responses; and

Information received from consumer reporting agencies regarding credit history and creditworthiness (such as the amount of an individual’s total debt, payment history, etc.).

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, or with other financial institutions or affiliates for joint marketing purposes, unless you have authorized the Funds 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 or 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 marketing services solely for the Funds;

The Funds’ representatives such as legal counsel, accountants and auditors; and

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

NOT PART OF THE SEMI-ANNUAL REPORT

Legg Mason Funds Privacy and Security Notice (cont’d)

Except as otherwise permitted by applicable law, companies acting on the Funds’ behalf 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 to perform.

The Funds may disclose nonpublic personal information about you when necessary to enforce their rights or protect against fraud, or as permitted or required 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 to disclose 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 remain unchanged.

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 will notify 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 data security 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 consented to the Funds using electronic communications or electronic delivery of statements, they may notify you under such circumstances 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 is incomplete, not accurate or not current, or if you have questions about the Funds’ privacy practices, write the Funds using the contact information on your account statements, email the Funds by clicking on the Contact Us section of the Funds’ website at www.leggmason.com, or contact the Fund at 1-888-777-0102.

NOT PART OF THE SEMI-ANNUAL REPORT

Western Asset Investment Grade Defined Opportunity Trust Inc.

620 Eighth Avenue

49th Floor

New York, NY 10018

Notice is hereby given in accordance with Section 23(c) of the Investment Company Act of 1940, as amended, that from time to time the Fund may purchase at market price shares of its common stock in the open market.

The Fund files its complete schedule of portfolio holdings with the Securities and Exchange Commission (“SEC”) for the first and third quarters of each fiscal year on Form N-Q. The Fund’s Forms N-Q are available on the SEC’s website at www.sec.gov. The Fund’s Forms N-Q may be reviewed and copied at the SEC’s Public Reference Room in Washington, D.C., and information on the operation of the Public Reference Room may be obtained by calling 1-800-SEC-0330. To obtain information on Form N-Q from the Fund, shareholders can call 1-888-777-0102.

Information on how the Fund voted proxies relating to portfolio securities during the prior 12-month period ended June 30th of each year and a description 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) on the Fund’s website at www.lmcef.com and (3) on the SEC’s website at www.sec.gov.

This report is transmitted to the shareholders of Western 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.

American Stock

Transfer & Trust Company

6201 15th Avenue

Brooklyn, NY 11219

WASX012742 7/15 SR15-2524

ITEM 2.

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.

ITEM 10.

SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

Not applicable.

ITEM 11.

CONTROLS AND PROCEDURES.

(a)

The registrant’s principal executive officer and principal financial officer have concluded that the registrant’s disclosure controls and procedures (as defined in Rule 30a- 3(c) under the Investment Company 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 and procedures 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 in the registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act) that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are likely to materially affect the registrant’s internal control over financial reporting.

ITEM 12.

EXHIBITS.

(a) (1) Not applicable.

Exhibit 99.CODE ETH

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

Exhibit 99.CERT

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

Exhibit 99.906CERT

SIGNATURES

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

Western Asset Investment Grade Defined Opportunity Trust Inc.


By:		/s/ Kenneth D. Fuller
		Kenneth D. Fuller
		Chief Executive Officer

Date:		July 24, 2015

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/ Kenneth D. Fuller
		Kenneth D. Fuller
		Chief Executive Officer

Date:		July 24, 2015

By:		/s/ Richard F. Sennett
		Richard F. Sennett
		Principal Financial Officer

Date:		July 24, 2015