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[LETTERHEAD]
State Street Research & Management Company
One Financial Center
Boston, Massachusetts 02111
VIA EDGAR
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June 2, 2000
Securities and Exchange Commission
450 Fifth Street, N.W.
Judiciary Plaza
Washington, DC 20549
Re: State Street Research Institutional Funds
Securities Act of 1933 Registration No. 333-73433
Investment Company Act of 1940 File No. 811-09247
CIK No. 0001080727
Ladies and Gentlemen:
The undersigned, STATE STREET RESEARCH INSTITUTIONAL FUNDS, a
Massachusetts business trust (the "Registrant"), does hereby certify as
follows:
(1) That the forms of prospectus and Statement of Additional Information
that would have been filed under paragraph (c) of Rule 497 of the
Securities Act of 1933, as amended (the "Securities Act"), would not
have differed from that contained in the most recent amendment to the
registration statement of the Registrant (Post-Effective Amendment No. 1
under the Securities Act: Amendment No. 2 under the Investment Company
Act of 1940, as amended); and
(2) That the text of the most recent amendment to the Registrant's
registration statement has been filed electronically (EDGAR accession
number 0000912057-00-026567).
STATE STREET RESEARCH
INSTITUTIONAL FUNDS
By: /s/ Mara D. Calame
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Mara D. Calame
Assistant Secretary
