N-MFP3 0001107414 XXXXXXXX 2026-06-30 STATE STREET INSTITUTIONAL INVESTMENT TRUST 0001107414 549300P1E098W6ES7M39 State Street Stablecoin Reserves Money Market Fund 984500A7CB8E47C40D54 S000101071 2 N N 333-30810 SSGA Funds Management, Inc. 801-60103 Ernst & Young LLP Boston MA SSGA Funds Management, Inc. 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Tri Party Repo Deutsche Bank Securities Inc. Tri Party Repo 3.639900% 99VDGG008 9J6MBOOO7BECTDTUZW19 0001074042 99VDGG008_3.64_0701 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US TREASURY N/B 254900HROIFWPRGM1V77 912810TM0 2042-11-15 4.000000 0.00 22348800.00 20400074.04 U.S. Treasuries (including strips) Y 2026-07-01 2026-07-01 2026-07-01 N N N 0.0364 20000000.00 20000000.00 0.1653 N Y Y N Goldman Sachs & Co. LLC Tri Party Repo Goldman Sachs & Co. LLC Tri Party Repo 3.639900% 99VDJN000 FOR8UP27PHTHYVLBNG30 0000886982 99VDJN000_3.64_0701 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US TREASURY N/B 254900HROIFWPRGM1V77 912810SU3 2051-02-15 1.875000 0.00 35948700.00 20400038.98 U.S. Treasuries (including strips) Y 2026-07-01 2026-07-01 2026-07-01 N N N 0.0364 20000000.00 20000000.00 0.1653 N Y Y N HSBC Securities USA Inc. Tri Party Repo HSBC Securities USA Inc. Tri Party Repo 3.639900% 99VDKG003 CYYGQCGNHMHPSMRL3R97 0000083246 99VDKG003_3.64_0701 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US TREASURY N/B 254900HROIFWPRGM1V77 912810RV2 2047-02-15 3.000000 0.00 20118800.00 15300022.39 U.S. Treasuries (including strips) Y 2026-07-01 2026-07-01 2026-07-01 N N N 0.0364 15000000.00 15000000.00 0.1240 N Y Y N Bank of America Tri Party Repo Bank of America Tri Party Repo 3.639900% 99VDMN006 549300HN4UKV1E2R3U73 0000065100 99VDMN006_3.64_0701 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y US TREASURY N/B 254900HROIFWPRGM1V77 91282CMB4 2027-12-15 4.000000 0.00 8760000.00 8757007.10 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CKA8 2027-02-15 4.125000 0.00 6733600.00 6840861.45 U.S. Treasuries (including strips) Y 2026-07-01 2026-07-01 2026-07-01 N N N 0.0364 15292000.00 15292000.00 0.1264 N Y Y N STATE STREET INSTITUTIONAL INVESTMENT TRUST 2026-07-08 /s/ Chad Hallett Chad Hallett Deputy Treasurer