Results

Fidelity Summer Street Trust

07/31/2026 | Press release | Distributed by Public on 07/31/2026 08:54

Prospectus Certification by Investment Company (Form 497J)

245 Summer Street

Fidelity® Investments

Boston, MA 02210

July 31, 2026

U.S. Securities & Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Attention: File Room

RE:

Fidelity Summer Street Trust (the trust): File Nos. 002-58542 and 811-02737

Fidelity Agricultural Productivity Fund

Fidelity Climate Action Fund

Fidelity SAI Sustainable Sector Fund

Fidelity SAI Sustainable U.S. Equity Fund

Fidelity Sustainable U.S. Equity Fund

Fidelity Water Sustainability Fund

(the fund(s))

________________________________________________________________________

Ladies and Gentlemen:

Transmitted herewith pursuant to Rule 497(j) under the Securities Act of 1933 is certification that the Prospectus(es) and Statement(s) of Additional Information with respect to the above referenced fund(s) do not differ from those filed in the most recent post-effective amendment, which was filed electronically.

Very truly yours,

/s/Nicole Macarchuk

Nicole Macarchuk

Secretary of the Trust

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