State Street (STT) 10-K 2011 FY Annual report

Exhibit 21

SUBSIDIARIES OF STATE STREET CORPORATION

The following table presents the name of each significant State Street subsidiary and the state or jurisdiction of its organization. Certain subsidiaries of State Street have been omitted in accordance with SEC regulations because, when considered in the aggregate, they did not constitute a “significant subsidiary” of State Street.

Currenex INC	Massachusetts
EuroGalleon Limited	Ireland Ireland
International Fund Services (Ireland) Limited	Massachusetts
Investors Boston Securities Corporation	California
Investors California, LLC	Massachusetts
Investors Copley Securities Corporation	Massachusetts
Lincoln Securities Corporation	Grand Cayman
Offshore Financial Solutions LTD	New Jersey
Princeton Financial Systems	Massachusetts
Quincy Securities Corporation	Australia
SS Borrowdale Pty Limited	Australia
SS Scarborough Pty Limited	Massachusetts
SSB Realty, LLC	Delaware
State Street AIS Europe LLC	Massachusetts
State Street Bank and Trust Company	United Kingdom
State Street Bank Europe, Limited	Germany
State Street Bank GmbH	Italy
State Street Bank S.p.A.	Luxembourg
State Street Bank Luxembourg S.A.	France
State Street Banque, S.A.	Delaware
State Street Global Advisors International Holdings INC	Delaware
State Street Global Advisors, INC	United Kingdom
State Street Global Markets Intl Ltd.	Massachusetts
State Street Global Markets, LLC	Germany
State Street Holdings Germany GmbH	Ireland Italy
State Street Holdings Ireland	Massachusetts
State Street Holdings Italy S.R.L.	Switzerland
State Street International Holdings	Ireland
State Street International Holdings Switzerland GmbH	California
State Street International Ireland Limited	Massachusetts
State Street Investment Services California LLC
State Street Massachusetts Securities Corporation