STATE STREET INSTITUTIONAL INVESTMENT TRUST AMENDMENT NO. 7 to Agreement and Declaration of Trust

Exhibit (a)(8)

STATE STREET INSTITUTIONAL INVESTMENT TRUST
AMENDMENT NO. 7 to Agreement and Declaration of Trust

     AMENDMENT NO. 7 to the Agreement and Declaration of Trust of State Street Institutional Investment Trust (the “Trust”), dated February 16, 2000 (the “Agreement”), made at Boston, Massachusetts this 19^th day of October 2011.

     WHEREAS, the Trustees desire to add an additional class of shares (the “Class M Shares”) to the State Street Institutional Liquid Reserves Fund, a Series of the Trust and

     WHEREAS, Section 5 of Article III of the Agreement provides that the Trustees may amend the Agreement to, among other things, change the designation of any Series or classes of Shares; and

     WHEREAS, Section 5 of Article III of the Agreement provides that the establishment and designation of any class of Shares shall be effective upon the execution by a majority of the then Trustees of an amendment to the Agreement setting forth such establishment and designation and the relative rights and preferences of such class and such eligibility requirements for investment therein as the Trustees may determine, or as otherwise provided in such amendment;

     NOW, THEREFORE, the undersigned Trustees hereby amend the Agreement as follows:

     The first paragraph of Section 6 of Article III of the Agreement is hereby deleted in its entirety and the following paragraph is hereby substituted therefor:

Section 6. Establishment and Designation of Series and Classes. Without limiting the authority of the Trustees set forth in Section 5, inter alia, to establish and designate any further Series or classes or to modify the rights and preferences of any Series or class, the following Series of Shares be, and hereby are, established and designated as Multi-Class Series:

Name of Series		Effective Date:
State Street Equity 500 Index Fund		February 28, 2000
Administrative Shares		February 12, 2004
Service Shares		February 12, 2004
Class R Shares		May 19, 0000
Xxxxx Xxxxxx Equity 400 Index Fund		February 28, 0000
Xxxxx Xxxxxx Equity 2000 Index Fund		February 28, 0000
Xxxxx Xxxxxx XXXX EAFE Index Fund		February 28, 0000
Xxxxx Xxxxxx Xxxxxxxxx Bond Index Fund		February 28, 0000
Xxxxx Xxxxxx Institutional Liquid Reserves Fund		May 13, 2004
Institutional Class Shares		May 13, 2004
Investment Class Shares		October 2, 2007
Service Class Shares		September 18, 2008
Class M Shares		October 19, 0000
Xxxxx Xxxxxx X.X. Government Money Market Fund		February 14, 2002
Institutional Class Shares		February 14, 2002
Investment Class Shares		October 2, 2007
Service Class Shares		September 18, 0000
Xxxxx Xxxxxx Institutional Limited Duration Bond Fund		February 6, 0000
Xxxxx Xxxxxx Institutional Short-Term Tax Exempt Bond Fund		February 6, 2007
(formerly State Street Institutional Tax Free Limited      Duration Bond Fund)
State Street Institutional Tax Free Money Market Fund		February 6, 2007
Institutional Class Shares		February 6, 2007

Name of Series		Effective Date:
Investment Class Shares		October 2, 2007
Service Class Shares		September 18, 0000
Xxxxx Xxxxxx Institutional Treasury Money Market Fund		October 2, 2007
Institutional Class Shares		October 2, 2007
Investment Class Shares		October 2, 2007
Service Class Shares		September 18, 0000
Xxxxx Xxxxxx Institutional Treasury Plus Money Market Fund		October 2, 2007
Institutional Class Shares		October 2, 2007
Investment Class Shares		October 2, 2007
Service Class Shares		September 18, 2008

     IN WITNESS WHEREOF, the undersigned hereunto have set their hands in the City of Boston, Commonwealth of Massachusetts, as of the 19^th day of October 2011.

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