Statement on Form S-8 is being filed for the purpose of registering an additional 400,000 shares of the common stock of Seres Therapeutics, Inc. (the Registrant) to be issued pursuant to the ESPP
and an additional 1,637,469 shares of the Registrants common stock to be issued pursuant to the Incentive Plan. A Registration Statement of the Registrant on Form S-8 relating to the same employee
benefit plans is effective.
INCORPORATION BY REFERENCE OF CONTENTS OF
REGISTRATION STATEMENTS ON FORM S-8
Except as set forth below, the contents of the Registration Statements on Form S-8 (File Nos. 333-205253, 333-210171 and 333-223514) filed with the Securities and Exchange Commission, relating to the ESPP and Incentive
Plan, are incorporated by reference herein.
Item 8. Exhibits.