Exhibit (e)(8) FORM OF THIRD AMENDMENT TO DISTRIBUTION AGREEMENT This Third Amendment to the Distribution Agreement, dated as of ____, 2009 (the "Amendment"), by and between State Street Institutional Investment Trust, a trust established under the...

                                                                  Exhibit (e)(8)

                FORM OF THIRD AMENDMENT TO DISTRIBUTION AGREEMENT

     This Third Amendment to the Distribution Agreement, dated as of ____, 2009
(the "Amendment"), by and between State Street Institutional Investment Trust, a
trust established under the laws of the Commonwealth of Massachusetts (the
"Fund"), and ALPS Distributors, Inc., a Colorado corporation, having its
principal place of business at ▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇ ▇▇▇▇▇
(the "Distributor").

     WHEREAS, the Fund and Distributor entered into a Distribution Agreement
dated February 1, 2005 (the "Agreement"); and

     WHEREAS, the Distributor and the Fund wish to modify the provisions of the
Agreement to reflect the addition of a new class under Annex I of this
Agreement; and

     NOW THEREFORE, the parties hereby agree to amend the Agreement as follows:

     1. The parties hereto agree to delete Annex I in its entirety and replace
it with a new Annex I attached hereto, dated ____, 2009.

     2. Except as specifically set forth herein, all other provisions of the
Agreement shall remain in full force and effect. Any items not herein defined
shall have the meaning ascribed to them in the Agreement.

     IN WITNESS WHEREOF, the parties have executed this Amendment as of the date
first written above.

STATE STREET INSTITUTIONAL              ALPS DISTRIBUTORS, INC.
INVESTMENT TRUST


By:                                     By:
    ---------------------------------       ------------------------------------
Name:                                   Name:
Title:                                  Title:



                                     ANNEX I

                                  AS AMENDED ON
                                OCTOBER 11, ▇▇▇▇

▇▇▇▇

▇▇▇▇▇ ▇▇▇▇▇▇ Equity 500 Index Fund (Administrative Class/Service Class/R Class)
State Street Equity 400 Index Fund
State Street Equity 2000 Index Fund
State Street Aggregate Bond Index Fund
State Street Institutional U.S. Government Money Market Fund (Institutional
Class/Investment Class/Service Class)
State Street Institutional Liquid Reserves Fund (Institutional Class/Investment
Class/Service Class)
State Street Institutional Limited Duration Bond Fund
State Street Institutional Tax Free Limited Duration Bond Fund
State Street Institutional Tax Free Money Market Fund (Institutional
Class/Investment Class/Service Class)
State Street Institutional Treasury Money Market Fund (Institutional
Class/Investment Class/Service Class)
State Street Institutional Treasury Plus Money Market Fund (Institutional
Class/Investment Class/Service Class)