0001609809 2026-07-08 2026-07-08 0001609809 1 2026-07-08 2026-07-08 iso4217:USD pure shares S-8 S-8 EX-FILING FEES 0001609809 Seres Therapeutics, Inc. N/A false S-8 Seres Therapeutics, Inc. Equity Common Stock, par value $0.001 per share true 900000 7.66 6894000.00 0.0001381 952.06 6894000.00 952.06 0.00 952.06 (1) In accordance with Rule 416(a) under the Securities Act of 1933, as amended ("Securities Act"), this registration statement shall be deemed to cover any additional securities that may from time to time be offered or issued under the Seres Therapeutics, Inc. 2025 Incentive Award Plan (the "Incentive Plan") to prevent dilution resulting from stock splits, stock dividends or similar transactions. In addition, pursuant to Rule 416(c) under the Securities Act, this registration statement also covers an indeterminate amount of interests to be offered or sold pursuant to the Incentive Plan. (2) Consists of 900,000 shares of Common Stock that may become issuable under the Incentive Plan pursuant to its terms. (3) Estimated solely for the purpose of calculating the registration fee pursuant to Rules 457(c) and 457(h) of the Securities Act of 1933, as amended, and based upon the average of the high and low prices of the Common Stock as reported on the Nasdaq Global Select Market on July 6, 2026.