NPORT-P false 0001107414 XXXXXXXX S000046039 C000143880 C000143881 STATE STREET INSTITUTIONAL INVESTMENT TRUST 811-09819 0001107414 549300P1E098W6ES7M39 One Iron Street Boston 02210 617-664-7037 State Street Target Retirement 2040 Fund S000046039 549300ITINN7P01J1Y08 2020-12-31 2020-06-30 N 826196153.73 15213178.98 810982974.75 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 N State Street Global All Cap Equity ex-U.S. Index Portfolio N/A 85749T764 2989867.36700000 NS USD 283947703.84000000 35.01278234941 Long EC RF US N 1 N N N State Street Equity 500 Index II Portfolio N/A 85749T756 1003765.86800000 NS USD 293942796.79000000 36.24524878350 Long EC RF US N 1 N N N State Street Aggregate Bond Index Portfolio 549300CYRPLDVB2ZTF93 85749T772 475875.92300000 NS USD 51337494.57000000 6.330280186933 Long EC RF US N 1 N N N State Street Small/Mid Cap Equity Index Portfolio 54930001FXUIVS800B48 85749T707 473658.50800000 NS USD 113502788.27000000 13.99570543450 Long EC RF US N 1 N N N SPDR Portfolio Long Term Treasury ETF 549300GYQKAMF6JUVI06 78464A664 1649257.00000000 NS USD 77366645.87000000 9.539860672642 Long EC RF US N 1 N N State Street Global Advisors 5493008BJIBKQ5KTIF74 857492706 4617525.00000000 NS USD 4617525.00000000 0.569373851704 Long STIV RF US N 1 N N State Street Global Advisors 549300BZ5TGIFZUZDZ37 857492706 1480929.61000000 NS USD 1480929.61000000 0.182609210810 Long STIV RF US N 1 N N N 2020-07-29 STATE STREET INSTITUTIONAL INVESTMENT TRUST Daniel Foley Daniel Foley Assistant Treasurer