UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP ( ) Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instructions 1(b). 1. Name and Address of Reporting Person Walsh, Diana Chapman Wellesley College Greenhall Building, Room 350 106 Central Street Wellesley, MA 02181 2. Issuer Name and Ticker or Trading Symbol State Street Corporation STT 3. IRS or Social Security Number of Reporting Person (Voluntary) 4. Statement for Month/Year 4/30/01 5. If Amendment, Date of Original (Month/Year) 6. Relationship of Reporting Person(s) to Issuer (Check all applicable) (X) Director ( ) 10% Owner ( ) Officer (give title below) ( ) Other (specify below) 7. Individual or Joint/Group Filing (Check Applicable Line) (X) Form filed by One Reporting Person ( ) Form filed by More than One Reporting Person

Explanation of Responses: (1) Payment of director's retainer. (2) Payment of Director's Deferred Stock Award exempt under Rule 16b-3(d). (3) Includes Directors' Deferred Stock Award dividend equivalents, and DRIP shares acquired through April 2001. SIGNATURE OF REPORTING PERSON /s/Diana Chapman Walsh DATE 05/03/01

STATE STREET CORP 4