NPORT-P false 0001107414 XXXXXXXX S000010695 C000029583 C000136665 C000136666 C000029582 C000029581 C000136667 STATE STREET INSTITUTIONAL INVESTMENT TRUST 811-09819 0001107414 549300P1E098W6ES7M39 One Iron Street Boston 02210 617-664-7037 State Street Equity 500 Index Fund S000010695 549300H1RTP6FLZEZA60 2021-12-31 2021-12-31 N 3362812504.23 538752.80 3362273751.43 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 Equity 500 Index II Portfolio 549300IDK82VZN2AFK60 85749T756 7782569.74800000 NS USD 3362770562.41000000 100.0147760419 Long EC RF US N 1 N N N 2022-01-28 STATE STREET INSTITUTIONAL INVESTMENT TRUST Arthur Jensen Arthur Jensen Deputy Treasurer