PAGE 1 000 A000000 05/31/2017 000 C000000 1462586 000 D000000 N 000 E000000 NF 000 F000000 Y 000 G000000 N 000 H000000 N 000 I000000 6.1 000 J000000 A 001 A000000 WA INVESTMENT GRADE DEFINED OPP TRUST INC. 001 B000000 811-22294 001 C000000 8887770102 002 A000000 620 EIGHTH AVENUE, 49TH FLOOR 002 B000000 NEW YORK 002 C000000 NY 002 D010000 10018 003 000000 N 004 000000 N 005 000000 N 006 000000 N 007 A000000 N 007 B000000 0 007 C010100 1 008 A000001 LEGG MASON PARTNERS FUND ADVISOR, LLC 008 B000001 A 008 C000001 801-66785 008 D010001 NEW YORK 008 D020001 NY 008 D030001 10018 008 A000002 WESTERN ASSET MANAGEMENT COMPANY 008 B000002 S 008 C000002 801-08162 008 D010002 PASADENA 008 D020002 CA 008 D030002 91101 008 A000003 WESTERN ASSET MANAGEMENT COMPANY PTE. LTD. 008 B000003 S 008 C000003 801-67298 008 D010003 SINGAPORE 008 D050003 SINGAPORE 008 D060003 049145 008 A000004 WESTERN ASSET MANAGEMENT COMPANY LTD 008 B000004 S 008 C000004 801-68224 008 D010004 TOKYO 008 D050004 JAPAN 008 D060004 100-6536 008 A000005 WESTERN ASSET MANAGEMENT COMPANY LIMITED 008 B000005 S 008 C000005 801-21068 008 D010005 LONDON PAGE 2 008 D050005 ENGLAND 008 D060005 EC2A2EN 012 A000001 COMPUTERSHARE INC. 012 B000001 85-11340 012 C010001 LOUISVILLE 012 C020001 KY 012 C030001 40202 013 A000001 KPMG LLP 013 B010001 NEW YORK 013 B020001 NY 013 B030001 10154 014 A000001 Clarion Partners Securities LLC 014 B000001 8-69204 014 A000002 EnTrustPermal Securities LLC 014 B000002 8-67822 014 A000003 Financial Guard, LLC 014 B000003 8-0178197 014 A000004 LEGG MASON INVESTOR SERVICES, LLC 014 B000004 8-53089 014 A000005 PERMAL (HONG KONG) LIMITED 014 B000005 8-00000 014 A000006 ROYCE FUND SERVICES, INC. 014 B000006 8-28663 015 A000001 STATE STREET BANK AND TRUST COMPANY 015 B000001 C 015 C010001 BOSTON 015 C020001 MA 015 C030001 02111 015 E010001 X 018 000000 Y 019 A000000 Y 019 B000000 154 019 C000000 LEGGMASONF 020 A000001 UBS SECURITIES LLC 020 B000001 13-3873456 020 C000001 6 021 000000 6 022 A000001 STATE STREET BANK & TRUST CO. 022 B000001 04-1867445 022 C000001 21829 022 D000001 20747 022 A000002 UBS SECURITIES LLC 022 B000002 13-3873456 022 C000002 14119 022 D000002 15116 022 A000003 BANK OF AMERICA-MERRILL LYNCH 022 B000003 56-2058405 022 C000003 5019 022 D000003 9868 022 A000004 RBC CAPITAL MARKETS CORP. 022 B000004 41-1416330 PAGE 3 022 C000004 5383 022 D000004 5629 022 A000005 GOLDMAN SACHS & CO. 022 B000005 13-5108880 022 C000005 5744 022 D000005 4027 022 A000006 JPMORGAN CHASE & CO. 022 B000006 13-3224016 022 C000006 6881 022 D000006 2579 022 A000007 CITIGROUP GLOBAL MARKETS INC. 022 B000007 11-2418191 022 C000007 5907 022 D000007 2492 022 A000008 MORGAN STANLEY 022 B000008 13-2655998 022 C000008 3796 022 D000008 4347 022 A000009 BARCLAYS CAPITAL INC. 022 B000009 06-1031656 022 C000009 3777 022 D000009 2494 022 A000010 PERSHING LLC 022 B000010 13-2741729 022 C000010 2222 022 D000010 1678 023 C000000 85549 023 D000000 82150 024 000000 Y 025 A000001 MORGAN STANLEY 025 B000001 13-2655998 025 C000001 D 025 D000001 4123 025 A000002 JPMORGAN CHASE & CO. 025 B000002 13-3224016 025 C000002 D 025 D000002 3660 025 A000003 UBS SECURITIES LLC 025 B000003 13-3873456 025 C000003 D 025 D000003 389 025 A000004 BANK OF AMERICA-MERRILL LYNCH 025 B000004 56-2058405 025 C000004 D 025 D000004 8907 025 A000005 GOLDMAN SACHS & CO. 025 B000005 13-5108880 025 C000005 D 025 D000005 8284 025 A000006 CITIGROUP GLOBAL MARKETS INC. 025 B000006 11-2418191 PAGE 4 025 C000006 D 025 D000006 7441 025 A000007 BARCLAYS CAPITAL INC. 025 B000007 06-1031656 025 C000007 D 025 D000007 878 025 A000008 CITIGROUP GLOBAL MARKETS INC. 025 B000008 11-2418191 025 C000008 E 025 D000008 457 026 A000000 N 026 B000000 Y 026 C000000 N 026 D000000 Y 026 E000000 N 026 F000000 N 026 G010000 N 026 G020000 N 026 H000000 N 027 000000 N 028 A010000 0 028 A020000 0 028 A030000 0 028 A040000 0 028 B010000 0 028 B020000 0 028 B030000 0 028 B040000 0 028 C010000 0 028 C020000 0 028 C030000 0 028 C040000 0 028 D010000 0 028 D020000 0 028 D030000 0 028 D040000 0 028 E010000 0 028 E020000 0 028 E030000 0 028 E040000 0 028 F010000 0 028 F020000 0 028 F030000 0 028 F040000 0 028 G010000 0 028 G020000 0 028 G030000 0 028 G040000 0 028 H000000 0 030 A000000 0 030 B000000 0.00 PAGE 5 030 C000000 0.00 031 A000000 0 031 B000000 0 032 000000 0 033 000000 0 035 000000 0 036 B000000 0 038 000000 0 042 A000000 0 042 B000000 0 042 C000000 0 042 D000000 0 042 E000000 0 042 F000000 0 042 G000000 0 042 H000000 0 043 000000 0 044 000000 0 045 000000 Y 046 000000 N 047 000000 Y 048 000000 0.650 048 A010000 0 048 A020000 0.000 048 B010000 0 048 B020000 0.000 048 C010000 0 048 C020000 0.000 048 D010000 0 048 D020000 0.000 048 E010000 0 048 E020000 0.000 048 F010000 0 048 F020000 0.000 048 G010000 0 048 G020000 0.000 048 H010000 0 048 H020000 0.000 048 I010000 0 048 I020000 0.000 048 J010000 0 048 J020000 0.000 048 K010000 0 048 K020000 0.000 049 000000 N 050 000000 N 051 000000 N 052 000000 N 053 A000000 N 054 A000000 Y 054 B000000 Y PAGE 6 054 C000000 Y 054 D000000 N 054 E000000 N 054 F000000 N 054 G000000 Y 054 H000000 Y 054 I000000 N 054 J000000 Y 054 K000000 N 054 L000000 Y 054 M000000 Y 054 N000000 N 054 O000000 Y 055 A000000 N 055 B000000 N 056 000000 Y 057 000000 N 058 A000000 N 059 000000 Y 060 A000000 N 060 B000000 N 061 000000 0 062 A000000 Y 062 B000000 0.0 062 C000000 0.0 062 D000000 0.0 062 E000000 0.0 062 F000000 0.0 062 G000000 0.0 062 H000000 0.0 062 I000000 0.0 062 J000000 0.0 062 K000000 0.0 062 L000000 0.8 062 M000000 0.4 062 N000000 0.0 062 O000000 0.3 062 P000000 92.7 062 Q000000 3.6 062 R000000 1.3 063 A000000 0 063 B000000 11.9 064 A000000 N 064 B000000 N 066 A000000 N 067 000000 N 068 A000000 N 068 B000000 N 069 000000 N 070 A010000 Y 070 A020000 N PAGE 7 070 B010000 Y 070 B020000 N 070 C010000 Y 070 C020000 N 070 D010000 Y 070 D020000 N 070 E010000 Y 070 E020000 Y 070 F010000 Y 070 F020000 N 070 G010000 Y 070 G020000 N 070 H010000 Y 070 H020000 N 070 I010000 N 070 I020000 N 070 J010000 Y 070 J020000 Y 070 K010000 Y 070 K020000 Y 070 L010000 Y 070 L020000 Y 070 M010000 Y 070 M020000 Y 070 N010000 Y 070 N020000 N 070 O010000 N 070 O020000 N 070 P010000 Y 070 P020000 N 070 Q010000 N 070 Q020000 N 070 R010000 Y 070 R020000 N 071 A000000 51074 071 B000000 50756 071 C000000 219274 071 D000000 23 072 A000000 6 072 B000000 6104 072 C000000 102 072 D000000 0 072 E000000 0 072 F000000 719 072 G000000 0 072 H000000 0 072 I000000 17 072 J000000 2 072 K000000 0 072 L000000 15 072 M000000 27 PAGE 8 072 N000000 8 072 O000000 10 072 P000000 0 072 Q000000 0 072 R000000 30 072 S000000 15 072 T000000 0 072 U000000 0 072 V000000 0 072 W000000 23 072 X000000 867 072 Y000000 0 072 Z000000 5339 072AA000000 187 072BB000000 0 072CC010000 7335 072CC020000 0 072DD010000 5445 072DD020000 0 072EE000000 391 073 A010000 0.5038 073 A020000 0.0000 073 B000000 0.0362 073 C000000 0.0000 074 A000000 548 074 B000000 0 074 C000000 1725 074 D000000 219321 074 E000000 2853 074 F000000 0 074 G000000 0 074 H000000 0 074 I000000 0 074 J000000 0 074 K000000 0 074 L000000 3190 074 M000000 60 074 N000000 227697 074 O000000 450 074 P000000 124 074 Q000000 0 074 R010000 0 074 R020000 0 074 R030000 0 074 R040000 1115 074 S000000 0 074 T000000 226008 074 U010000 10811 074 U020000 0 074 V010000 20.91 074 V020000 0.00 PAGE 9 074 W000000 0.0000 074 X000000 7993 074 Y000000 548 075 A000000 0 075 B000000 222131 076 000000 20.60 077 A000000 Y 077 B000000 N 077 C000000 Y 077 D000000 N 077 E000000 N 077 F000000 N 077 G000000 N 077 H000000 N 077 I000000 N 077 J000000 N 077 K000000 N 077 L000000 N 077 M000000 N 077 N000000 N 077 O000000 N 077 P000000 N 077 Q010000 N 077 Q020000 N 077 Q030000 N 078 000000 N 080 C000000 0 081 B000000 0 082 B000000 0 083 B000000 0 084 B000000 0 086 A010000 6 086 A020000 124 086 B010000 0 086 B020000 0 086 C010000 0 086 C020000 0 086 D010000 0 086 D020000 0 086 E010000 0 086 E020000 0 086 F010000 0 086 F020000 0 087 A010000 Common Stock 087 A020000 95790A101 087 A030000 IGI 088 A000000 N 088 B000000 N 088 C000000 N 088 D000000 N SIGNATURE RICHARD F. SENNETT TITLE PFO