State Street Bank and Trust Company One Lincoln Street Boston, MA 02111 December 31, 2020 Ladies and Gentlemen:

Exhibit (h)(20)

State Street Bank and Trust Company

Xxx Xxxxxxx Xxxxxx

Boston, MA 02111

December 31, 2020

Ladies and Gentlemen:

Reference is made to the Transfer Agency and Service Agreement between State Street Master Funds (the “Trust”) and State Street Bank and Trust Company (“State Street”) dated March 1, 2000, as amended (the “Agreement”). Pursuant to the Agreement, State Street serves as the Transfer Agent for the Trust.

Please be advised that the undersigned Trust has established additional series of the Trust (the “New Portfolios”):

Portfolio		Effective Date
•  State Street International Developed Equity Index Portfolio		April 14, 2016
•  State Street ESG Liquid Reserves Portfolio		May 17, 2019

We request that you act as the Transfer Agent under the Agreement with respect to the New Portfolios in accordance with the existing fee schedule to the Agreement.

Please also be advised that, pursuant to the Agreement, the undersigned Trusts are providing notice that the following funds have been liquidated and are removed from Annex A:

Portfolio Name		Effective Date
State Street Tax Free Money Market Portfolio		December 15, 2015
State Street Equity 500 Index Portfolio		June 17, 2019

Please let me know if you have any questions.

Please indicate your acceptance of the foregoing by executing two copies of this letter, returning one to the Trust and retaining one copy for your records.

						Very Truly Yours,
						Accepted:
State Street Master Funds						State Street Bank and Trust Company
By:		/s/ Xxxxx X. Xxxxxxx				By:		/s/ Xxxxx Xxxx
Name:		Xxxxx X. Xxxxxxx, Xxxx Authorized				Name:		Xxxxx Xxxx
Title:		President				Title:		Managing Director

Annex A

State Street Master Funds

State Street ESG Liquid Reserves Portfolio

State Street Money Market Portfolio

State Street U.S. Government Money Market Portfolio

State Street Treasury Money Market Portfolio

State Street Treasury Plus Money Market Portfolio

State Street International Developed Equity Index Portfolio