N-MFP2/A 0001107414 XXXXXXXX 2018-09-30 0001107414 S000019118 6 N N 333-30810 SSGA Funds Management, Inc. 801-60103 Ernst & Young LLP Boston MA SSGA Funds Management, Inc. DST Asset Manager Solutions, Inc. 0000275143 084-00896 Y 0001094885 Treasury Plus Money Market Portfolio S000019934 N N Exempt Government N 1 1 12648425274.85 12532973741.12 13430045191.07 12200975429.71 13648425274.85 14017973741.12 14995045191.07 13515975429.71 0.00 0.8925 0.8778 0.8804 0.8856 0.9631 0.9818 0.9830 0.9811 0.0000 0.00 10772545474.52 10772545474.52 0.00 17891096.76 10754654377.76 10755116173.3880 1.0000 0.0204 1.0000 1.0000 1.0000 1.0000 0.0000 C000052879 25000000.00 58304260.52 58311741.8700 0.9999 0.9999 0.9999 0.9999 0.0000 1743164.88 33.69 1740417.74 217249.30 899351.34 824571.23 472630.12 1803944.83 0.00 0.00 4855564.08 2845799.05 0.0161 N C000052880 250000000.00 6079339831.15 6079479414.4190 1.0000 1.0000 1.0000 1.0000 0.0000 1624485912.19 484052663.17 1524620914.43 1458251948.97 2615141448.32 1552880655.23 1953391746.45 3253335942.00 0.00 0.00 7717640021.39 6748521209.37 0.0196 Y SSGA Funds Management Management Fees -15,692 C000143783 50000.00 39250024.11 39250000.0000 1.0000 1.0000 1.0000 1.0000 0.0000 124300000.00 150000000.00 0.00 85000000.00 104400000.00 83000000.00 24300000.00 82200000.00 0.00 0.00 253000000.00 400200000.00 0.0193 N C000143784 10000000.00 336256841.12 336257241.2100 1.0000 1.0000 1.0000 1.0000 0.0000 47992569.62 43701289.70 60762107.04 30807805.79 133424987.33 109770834.46 409380860.55 375914860.80 0.00 0.00 651560524.54 560194790.75 0.0188 Y SSGA Funds Management Management Fees -478 C000143785 50000.00 50000.01 50000.0000 1.0000 1.0000 1.0000 1.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0172 N C000172254 15000000.00 4241453420.85 4241767775.8890 0.9999 0.9999 0.9999 0.9999 0.0000 712578803.86 842222546.83 554275494.48 466176072.30 128374198.65 327520144.01 135966165.99 293427847.36 0.00 0.00 1531194662.98 1929346610.50 0.0191 Y SSGA Funds Management Management Fees -10,159 State Street Treasury Plus Money Market Portfolio State Street Treasury Plus Money Market Portfolio FSSgAK181 Investment Company Y 2018-10-01 2018-10-01 2018-10-01 N N N 0.0000 10772545474.52 10772545474.52 1.0000 N Y Y N STATE STREET INSTITUTIONAL INVESTMENT TRUST 2018-10-05 /s/ Chad Hallett Chad Hallett Deputy Treasurer