SERES THERAPEUTICS INC

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

MCRB (SERES THERAPEUTICS INC) is held by 22 institutional investors as of Q1 2026. Largest holders: MARSHALL WACE, LLP ($1.2M), Vontobel Holding Ltd. ($1.2M), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($934,357). Net institutional sentiment: Mixed.

22

Holders

Avg rating(2 Elite)

$6.9M

Total Value

42% (28)

Fund Consensus

10 buying - 14 selling

Smart Money Verdict

View all

43Weak MomentumStrong Convergence

Institutional (13F)40

Insider (Form 4)45

Activist (13D/13G)50

Congressional (STOCK Act)

No data

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See how MCRB's score breaks down across 4 SEC sources

Holder Quality

2

★★★★★

Elite

9

★★★★

Strong

10

★★★

Solid

7

★★

Below

0

★

Weak

Held by 22 funds

2 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

ActivistFMR LLC3.1%Aug 6, 2025

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

Positions (22)History

AllNewIncreasedHeldDecreasedExited

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
MWMARSHALL WACE, LLP	Increased	139,539(+16.1%)	$1.2M	0.0%	-32.43%	29
Vontobel Holding Ltd.	Increased	138,468(+34.1%)	$1.2M	0.0%	-49.15%	33
SUSQUEHANNA INTERNATIONAL GROUP, LLP	Decreased	105,339(-41.5%)	$934,357	0.0%	-47.09%	0
BlackRock, Inc.	Decreased	102,026(-1.5%)	$904,970	0.0%	-53.98%	0
GEODE CAPITAL MANAGEMENT, LLC	Decreased	74,835(-13.1%)	$664,108	0.0%	-93.30%	0
AMERICAN CENTURY COMPANIES INC	Increased	62,316(+283.0%)	$552,743	0.0%	-25.63%	39
STATE STREET CORP	Unchanged	33,901	$300,702	0.0%	-66.24%	0
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Increased	31,630(+0.8%)	$280,558	0.0%	-90.59%	16
MORGAN STANLEY	Decreased	21,700(-13.6%)	$192,478	0.0%	-55.09%	0
TWO SIGMA INVESTMENTS, LP	Decreased	18,794(-27.0%)	$166,703	0.0%	-47.09%	0
NORTHERN TRUST CORP	Unchanged	14,765	$130,966	0.0%	-93.37%	0
Invesco Ltd.	Increased	14,547(+1.3%)	$129,032	0.0%	-56.14%	15
UBS Group AG	Increased	7,030(+66.3%)	$62,357	0.0%	-43.04%	21
BARCLAYS PLC	Decreased	6,507(-12.4%)	$57,717	0.0%	-49.89%	0
SIMPLEX TRADING, LLC	Increased	3,070(+149.2%)	$27,230	0.0%	-40.17%	21
FMR LLC	Increased	1,752(+0.7%)	$15,540	0.0%	-53.86%	12
GROUP ONE TRADING LLC	New	824	$7,309	0.0%	-13.18%	25
BNP PARIBAS FINANCIAL MARKETS	Decreased	211(-72.7%)	$1,872	0.0%	-72.62%	0
ROYAL BANK OF CANADA	Increased	107(+1088.9%)	$1,000	0.0%	-16.62%	12
WELLS FARGO & COMPANY/MN	Decreased	10(-96.2%)	$89	0.0%	-47.20%	0

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High Conviction Moves-Signal Convergence-Fund Consensus-Double-Down Signals

Data sourced from four SEC data sources: 13F, Form 4, 13D/13G, and STOCK Act. Not financial advice. Full disclaimer