SERES THERAPEUTICS INC (MCRB) is held by 25 institutional investors that disclose positions via SEC 13F filings. The largest disclosed holder is VANGUARD CAPITAL MANAGEMENT LLC as of Q1 2026.

Are institutions buying or selling MCRB?

In Q1 2026, 13 institutions opened or increased positions in SERES THERAPEUTICS INC while 14 reduced or exited — a net selling quarter.

What is the Smart Money Verdict on MCRB?

The Smart Money Verdict combines four independent sources (institutional 13F activity, insider trades, activist filings, and congressional trades) into a single assessment for SERES THERAPEUTICS INC.

How many hedge funds hold MCRB?

25 institutional investors report holding SERES THERAPEUTICS INC (MCRB) as of Q1 2026, based on SEC 13F filings.

Is institutional money flowing into MCRB?

As of Q1 2026, tracked institutions in SERES THERAPEUTICS INC show 13 buyers versus 14 sellers — net outflows.

SERES THERAPEUTICS INC

MCRB·81750R201·US·Common Stock·Healthcare - Biotechnology-13D/G

Holders

Avg rating(5 Elite)

$9.9M

Total Value

48% (31)

Fund Consensus

13 buying - 14 selling

Smart Money Verdict

View all

Held by 25 funds

5 elite

Who's Trading

InsiderBKBrady KellySell $444.27May 18, 2026

InsiderSDShaff Eric D.Sell $2KFeb 15, 2026

InsiderYLYoung Teresa L.Sell $635.25Feb 15, 2026

InsiderDTDesRosier ThomasSell $660.66Feb 15, 2026

InsiderHRHenn Matthew RSell $753.83Feb 15, 2026

InsiderSDShaff Eric D.Sell $4KNov 15, 2025

InsiderYLYoung Teresa L.Sell $18KNov 15, 2025

InsiderDTDesRosier ThomasSell $1KNov 15, 2025

InsiderHRHenn Matthew RSell $22KNov 15, 2025

Activist

FMR LLC3.1%Aug 6, 2025

View all insider trades View all activist filings

13F: Mar 31, 2026Insider & Congress: Updated regularly

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
VAVANGUARD CAPITAL MANAGEMENT LLC	New	294,143	$2.6M	0.0%	-30.57%	36
MWMARSHALL WACE, LLP	Increased	139,539(+16.1%)	$1.2M	0.0%	-45.96%	29
Vontobel Holding Ltd.	Increased	138,468(+34.1%)	$1.2M	0.0%	-59.34%	33
SUSQUEHANNA INTERNATIONAL GROUP, LLP	Decreased	105,339(-41.5%)	$934,357	0.0%	-57.69%	0
BlackRock, Inc.	Decreased	102,026(-1.5%)	$904,970	0.0%	-63.20%	0
GEODE CAPITAL MANAGEMENT, LLC	Decreased	74,835(-13.1%)	$664,108	0.0%	-94.64%	0
AMERICAN CENTURY COMPANIES INC	Increased	62,316(+283.0%)	$552,743	0.0%	-40.52%	39
VFVANGUARD FIDUCIARY TRUST CO	New	39,643	$351,633	0.0%	-30.57%	33
STATE STREET CORP	Unchanged	33,901	$300,702	0.0%	-73.00%	0
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Increased	31,630(+0.8%)	$280,558	0.0%	-92.48%	16
MORGAN STANLEY	Decreased	21,700(-13.6%)	$192,478	0.0%	-64.08%	0
TWO SIGMA INVESTMENTS, LP	Decreased	18,794(-27.0%)	$166,703	0.0%	-57.69%	0
NORTHERN TRUST CORP	Unchanged	14,765	$130,966	0.0%	-94.70%	0
Invesco Ltd.	Increased	14,547(+1.3%)	$129,032	0.0%	-64.92%	15
UBS Group AG	Increased	7,030(+66.3%)	$62,357	0.0%	-54.45%	21
BARCLAYS PLC	Decreased	6,507(-12.4%)	$57,717	0.0%	-59.92%	0
SIMPLEX TRADING, LLC	Increased	3,070(+149.2%)	$27,230	0.0%	-52.15%	21
VGVanguard Global Advisers, LLC	New	1,975	$17,518	0.0%	-30.57%	28
FMR LLC	Increased	1,752(+0.7%)	$15,540	0.0%	-63.10%	12
GROUP ONE TRADING LLC	New	824	$7,309	0.0%	-30.57%	25