Seres Therapeutics, Inc.

SEC insider activity covers quarterly filings through June 30, 2026. Later filings are not included. Reported roles do not establish current employment or current holdings. SEC filing documents, sections and filing-text search cover filings dated January 1, 2000 onward. Earlier filings are deferred until after launch.

MCRB

organization

Jurisdiction: US-DELegal Form: XTIQ

ACTIVE

LEI: 549300GMXBE5NUWISF13SIC: 2834

Also known as: Seres Therapeutics, Inc.

SEC Insider

$134.0M

727 transactions

Summary

Seres Therapeutics, Inc. (MCRB) is an organization.

Recent Insider Transactions

As filed, including amendments; not net cash flow or current holdings. Joint reports count once. Totals cover known values only.

Buys: $47.5MSales: $58.9M47 insiders

Date	Insider	Type	Value
2026-05-18	Shaff Eric D.	Sell	$2K
2026-05-18	DesRosier Thomas(See Remarks)	Sell	$594.87
2026-05-18	Henn Matthew R(See Remarks)	Sell	$579.81
2026-05-18	Brady Kelly(See Remarks)	Sell	$444.27
2026-05-15	Henn Matthew R(See Remarks)	M	$0
2026-05-15	Henn Matthew R(See Remarks)	M	$0
2026-05-15	Henn Matthew R(See Remarks)	M	—
2026-05-15	DesRosier Thomas(See Remarks)	M	$0
2026-05-15	DesRosier Thomas(See Remarks)	M	$0
2026-05-15	DesRosier Thomas(See Remarks)	M	—
2026-05-15	Brady Kelly(See Remarks)	M	$0
2026-05-15	Brady Kelly(See Remarks)	M	$0
2026-05-15	Brady Kelly(See Remarks)	M	—
2026-05-15	Shaff Eric D.	M	$0
2026-05-15	Shaff Eric D.	M	$0
2026-05-15	Shaff Eric D.	M	—
2026-03-04	DesRosier Thomas(See Remarks)	A	$0
2026-03-04	Thorell Marella(See Remarks)	A	$0
2026-03-04	Henn Matthew R(See Remarks)	A	$0
2026-03-04	Kender Richard N(See Remarks)	A	$0

Legal entity: GLEIF

SEC filings: SEC EDGAR

Activity data: SEC EDGAR

Seres Therapeutics, Inc. — Contributions, Lobbying & Contracts | Poliscope