Holiday Calendar US Cash Funds 2021 Holiday Schedule State Street Institutional Investment Trust US Cash Funds

This information is indicative only. Please refer to the prospectus for further information.

2021 Holiday Calendar January February March January–December S M T W T F S S M T W T F S S M T W T F S 1 2 1 2 3 4 5 6 1 2 3 4 5 6 Fund Closed for Trading 3 4 5 6 7 8 9 7 8 9 10 11 12 13 7 8 9 10 11 12 13 Limited Trading1 10 11 12 13 14 15 16 14 15 16 17 18 19 20 14 15 16 17 18 19 20 Early Closing2 17 18 19 20 21 22 23 21 22 23 24 25 26 27 21 22 23 24 25 26 27 24 25 26 27 28 29 30 28 28 29 30 31 31

April May June S M T W T F S S M T W T F S S M T W T F S 1 2 3 1 1 2 3 4 5 4 5 6 7 8 9 10 2 3 4 5 6 7 8 6 7 8 9 10 11 12 11 12 13 14 15 16 17 9 10 11 12 13 14 15 13 14 15 16 17 18 19 18 19 20 21 22 23 24 16 17 18 19 20 21 22 20 21 22 23 24 25 26 25 26 27 28 29 30 23 24 25 26 27 28 29 27 28 29 30 30 31

July August September S M T W T F S S M T W T F S S M T W T F S 1 2 3 1 2 3 4 5 6 7 1 2 3 4 4 5 6 7 8 9 10 8 9 10 11 12 13 14 5 6 7 8 9 10 11 11 12 13 14 15 16 17 15 16 17 18 19 20 21 12 13 14 15 16 17 18 18 19 20 21 22 23 24 22 23 24 25 26 27 28 19 20 21 22 23 24 25 25 26 27 28 29 30 31 29 30 31 26 27 28 29 30

1 On these holidays the New York Exchange is open, October November December however, the Federal Reserve Bank is closed. There will be no S M T W T F S S M T W T F S S M T W T F S same day purchases or same 1 2 1 2 3 4 5 6 1 2 3 4 day redemptions. 3 4 5 6 7 8 9 7 8 9 10 11 12 13 5 6 7 8 9 10 11 2 Funds closing at 1PM ET on 10 11 12 13 14 15 16 14 15 16 17 18 19 20 12 13 14 15 16 17 18 early closing: 17 18 19 20 21 22 23 21 22 23 24 25 26 27 19 20 21 22 23 24 25 SSIIT Government Fund SSIIT Treasury Fund 24 25 26 27 28 29 30 28 29 30 26 27 28 29 30 31 SSIIT Treasury Plus Fund 31 Fund Status Date Holiday 2021 Holiday Dates Funds Closed for Trading January 1 New Year’s Day January 18 Martin Luther King Day February 15 President’s Day April 2 Good Friday May 31 Memorial Day July 5 Independence Day September 6 Labor Day November 25 Thanksgiving Day December 24 Christmas Day Limited Trading1 October 11 Columbus Day November 11 Veterans Day Early Close2 November 26 Thanksgiving Day (Observed)

Fund Trading Deadline Trade Deadline Information SSIIT Institutional Liquid Reserves Fund FNAV strike times 8AM ET, 12PM ET & 3PM ET State Street Institutional SSIIT ESG Liquid Reserves Fund FNAV strike times 8AM ET, 12PM ET & 3PM ET Mutual Funds SSIIT Government Fund 5:00PM ET SSIIT Treasury Fund 2:30PM ET SSIIT Treasury Plus Fund 5:00PM ET

Contacts For more information, please contact your client relationship manager.

US Cash Client Service 877-521-4083 [email protected]

ssga.com The information provided does not constitute State Street Global Advisors Funds Distributors, investment advice and it should not be relied on LLC member FINRA SIPC. as such. It should not be considered a State Street Global Advisors solicitation to buy or an offer to sell a security. © 2020 State Street Corporation. One Iron Street It does not take into account any investor’s All Rights Reserved. , MA 02210 particular investment objectives, strategies, ID347461-2327896.4.1.AM.RTL 1120 T: +1 617 786 3000 tax status or investment horizon. You should Exp. Date: 12/31/2021 consult your tax and financial advisor.

2021 Holiday Schedule State Street Institutional Investment Trust US Cash Funds 2