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Seres Therapeutics, Inc.

MCRB
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001609809

In the last 90 days, Seres Therapeutics, Inc. insiders filed 0 open-market purchases and 4 sales; 35 institutions reported holding it in 13F filings for Q2 2026, worth $17.9M in total; no superinvestor holds it.

Q4 2025 vs. Q3 2025

How the institutions holding Seres Therapeutics, Inc. changed between Q3 2025 and Q4 2025.

All holders in Q4 2025All holders in Q3 2025

13F holders of MCRB: Q3 2025 compared with Q4 2025
MeasureQ3 2025Q4 2025Change
Holders3236+4
Shares2.13M2.44M+315.7K (+14.9%)
Value$40.9M$36.4M−$4.53M (−11.1%)

New holders (9)

Institutions that held Seres Therapeutics, Inc. at the end of Q4 2025 but not at the end of Q3 2025.

Institutions new to MCRB in Q4 2025
InstitutionSharesValue% of portfolio
Susquehanna International Group, LLP179,929$2.68M0.00%
683 Capital Management, LLC52,314$778.4K0.06%
Two Sigma Investments, LP25,749$383.1K0.00%
American Century Companies Inc16,271$242.1K0.00%
Omers Administration Corp14,400$214.3K0.00%
Goldman Sachs Group Inc14,340$213.4K0.00%
ExodusPoint Capital Management, LP12,737$189.5K0.00%
Rachor Investment Advisory Services, LLC1,477$22.0K0.01%
Allworth Financial LP4$600.00%

Sold out (5)

Institutions that held Seres Therapeutics, Inc. at the end of Q3 2025 and filed for Q4 2025 without it.

Institutions that sold out of MCRB in Q4 2025
InstitutionShares, Q3 2025Value, Q3 2025
J. Goldman & Co LP27,000$519.5K
Citigroup Inc2,621$50.4K
JPMorgan Chase & Co65$1.25K
US Bancorp12$231
Federation des caisses Desjardins du Quebec3$58