N-MFP3 0001107414 XXXXXXXX 2026-09-30 STATE STREET INSTITUTIONAL INVESTMENT TRUST 0001107414 549300P1E098W6ES7M39 State Street Federal Government Money Market Fund 98450099C3D5363FC713 S000086383 5 N N 333-30810 SSGA Funds Management, Inc. 801-60103 Ernst & Young LLP Boston MA SSGA Funds Management, Inc. 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State Street U.S. Government Money Market Portfolio State Street U.S. Government Money Market Portfolio FSSgAK1AV 549300EG2J8MKJKUK458 0001094885 FSSgAK1AV Investment Company Y 2026-10-01 2026-10-01 2026-10-01 N N N 0.0000 198748010.01 198748010.01 1.0000 N Y Y N STATE STREET INSTITUTIONAL INVESTMENT TRUST 2026-10-07 /s/ Chad Hallett Chad Hallett Deputy Treasurer