SERES THERAPEUTICS INC

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

MCRB (SERES THERAPEUTICS INC) is held by 29 institutional investors as of Q2 2026. Largest holders: VANGUARD CAPITAL MANAGEMENT LLC ($2.3M), MARSHALL WACE, LLP ($1.4M), Vontobel Holding Ltd. ($970,273). Net institutional sentiment: Mixed.

29

Holders

(1 Elite)

$8.5M

Total Value

48% (25)

Consensus

12 buying - 13 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)26

Insider (Form 4)75

Activist (13D/13G)36

Congressional (STOCK Act)76

Holder Quality

35

★★★★★

Elite

75

★★★★

Strong

43

★★★

Solid

81

★★

Below

60

★

Weak

Held by 29 funds

1 elite

Who's Trading

Source dates: Price Aug 27, 2026 · Insiders Aug 18, 2026 · Activists Aug 6, 2025 · Congress none

InsiderBKBrady KellySell $291.2Aug 17, 2026

InsiderSDShaff Eric D.Sell $1KAug 17, 2026

InsiderDTDesRosier ThomasSell $373.1Aug 17, 2026

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Top Holders

Top Holders (29)History

AllNewIncreasedHeldDecreasedExited

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
VAVANGUARD CAPITAL MANAGEMENT LLC	Decreased	287,776(-2.2%)	$2.3M	0.0%	-45.91%	0
MWMARSHALL WACE, LLP	Increased	172,245(+23.4%)	$1.4M	0.0%	-55.34%	31
Vontobel Holding Ltd.	Decreased	122,975(-11.2%)	$970,273	0.0%	-68.32%	0
BlackRock, Inc.	Increased	111,000(+8.8%)	$875,790	0.0%	-70.06%	18
GEODE CAPITAL MANAGEMENT, LLC	Increased	79,974(+6.9%)	$631,301	0.0%	-95.51%	18
SUSQUEHANNA INTERNATIONAL GROUP, LLP	Decreased	58,328(-44.6%)	$460,208	0.0%	-67.04%	0
VFVANGUARD FIDUCIARY TRUST CO	Increased	48,685(+22.8%)	$384,125	0.0%	-44.85%	29
STATE STREET CORP	Unchanged	33,901	$267,479	0.0%	-78.97%	0
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Decreased	31,049(-1.8%)	$244,977	0.0%	-94.14%	0
AMERICAN CENTURY COMPANIES INC	Decreased	28,313(-54.6%)	$223,390	0.0%	-53.66%	0
XTX Topco Ltd	New	20,732	$163,575	0.0%	-39.67%	31
GOLDMAN SACHS GROUP INC	New	15,229	$120,157	0.0%	-39.67%	34
NORTHERN TRUST CORP	Unchanged	14,765	$116,496	0.0%	-95.87%	0
Invesco Ltd.	Decreased	12,974(-10.8%)	$102,365	0.0%	-72.67%	0
MORGAN STANLEY	Decreased	12,138(-44.1%)	$95,769	0.0%	-72.02%	0
CITADEL ADVISORS LLC	New	10,504	$82,877	0.0%	-39.67%	33
SIMPLEX TRADING, LLC	Increased	4,598(+49.8%)	$36,278	0.0%	-57.30%	19
IWIntegrated Wealth Concepts LLC	New	4,000	$31,560	0.0%	-39.67%	27
GROUP ONE TRADING LLC	Increased	3,714(+350.7%)	$29,303	0.0%	-41.18%	21
JPMORGAN CHASE & CO	New	3,636	$28,325	0.0%	-39.67%	30

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MCRBSERES THERAPEUTICS INC

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High Conviction Moves-Smart Money Convergence-Fund Consensus-Double-Down Detection

Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer