Shaff Eric D. bought MCRB
May 15, 2026 · Form 4 insider transaction
Shaff Eric D. bought 722 shares of Seres Therapeutics, Inc., a transaction worth N/A. The trade was recorded as option exercise and disclosed on an SEC Form 4, filed 4 days after the transaction.
Direction
Acquired (buy-side)
Shares
722
Price
N/A
Total value
N/A
InsiderShaff Eric D.
RoleDirector
SecurityCommon Stock
Transaction codeM: Option exercise
Transaction dateMay 15, 2026
Filing dateMay 19, 2026
Shares owned after12,299
OwnershipDirect
10b5-1 planNo
AmendedNo
Footnotes
Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.