4processed

Form 4 — Insider Transaction

Seres Therapeutics, Inc.(MCRB)

Filing Date

May 15, 2026

Accepted

May 15, 2026

Accession No.

0001193125-26-230732

CIK

0001609809

Insider Transactions

InsiderTitleTypeSharesPriceValueOwned AfterSecurityDate
Brady KellySee RemarksOther1808.6KCommon StockMay 15, 2026
Brady KellySee RemarksOther59$7.538.6KCommon StockMay 18, 2026
Brady KellySee RemarksOther89$0269Restricted Stock UnitsMay 15, 2026
Brady KellySee RemarksOther91$0639Restricted Stock UnitsMay 15, 2026