| 245 Summer Street | Fidelity® Investments | |||
| Boston, MA 02210 | ||||
| May 23, 2024 | ||||
U.S. Securities & Exchange Commission
100 F Street, N.E.
Washington, D.C. 20549
Attention: File Room
| Re: | Fidelity Summer Street Trust (the trust): | |
| Fidelity High Income Fund (the fund) | ||
| File No. 333-278507 |
Ladies and Gentlemen:
Transmitted herewith pursuant to Rule 497(j) under the Securities Act of 1933 is certification that the Prospectus and Statement of Additional Information with respect to the above referenced fund does not differ from that filed in the most recent post-effective amendment, which was filed electronically.
| Very truly yours, |
| /s/ Margaret Carey |
| Margaret Carey |
| Secretary of the Trust |