Who Owns SERES THERAPEUTI (MCRB)? -- Institutional Holders (2026-06-30)

39 institutions reported holding $19.5M of SERES THERAPEUTI (MCRB) in SEC 13F filings for 2026-06-30. Largest institutional holders: Flagship Pioneering Inc. ($9.1M), VANGUARD GROUP INC ($2.7M), MARSHALL WACE, LLP ($1.4M), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($1.1M), Vontobel Holding Ltd. ($970,273). Source: SEC Form 13F.

Rank	Institution	Value	Shares	Change
1	Flagship Pioneering Inc.	$9.1M	1.2M	Hold
2	VANGUARD GROUP INC	$2.7M	338,436	Added
3	MARSHALL WACE, LLP	$1.4M	172,245	Added
4	SUSQUEHANNA INTERNATIONAL GROUP, LLP	$1.1M	133,228	Trimmed
5	Vontobel Holding Ltd.	$970,273	122,975	Trimmed
6	BlackRock, Inc.	$875,790	111,000	Added
7	GEODE CAPITAL MANAGEMENT, LLC	$631,301	79,974	Added
8	CITADEL ADVISORS LLC	$426,092	54,004	Trimmed
9	STATE STREET CORP	$267,479	33,901	Hold
10	Lion Point Capital, LP	$249,087	31,570	Hold
11	GROUP ONE TRADING LLC	$245,489	31,114	Trimmed
12	Sixth Street Partners Management Company, L.P.	$244,977	31,049	New
13	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	$244,977	31,049	Trimmed
14	AMERICAN CENTURY COMPANIES INC	$223,390	28,313	Trimmed
15	SIMPLEX TRADING, LLC	$221,692	28,098	Added
16	XTX Topco Ltd	$163,575	20,732	New
17	GOLDMAN SACHS GROUP INC	$120,157	15,229	New
18	NORTHERN TRUST CORP	$116,496	14,765	Hold
19	Invesco Ltd.	$102,365	12,974	Trimmed
20	MORGAN STANLEY	$95,769	12,138	Trimmed
21	SBI Securities Co., Ltd.	$32,996	4,182	Added
22	JPMORGAN CHASE & CO	$28,325	3,636	New
23	FMR LLC	$12,056	1,528	Trimmed
24	Rachor Investment Advisory Services, LLC	$11,654	1,477	Hold
25	UBS Group AG	$3,818	484	Trimmed

来源：SEC 13F 申报文件 · 截至 2026-06-30