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.
13F holders, Q2 2025
Institutional positions in Seres Therapeutics, Inc. as of Jun 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 33
- −29 vs. Q1 2025
- Shares held
- 2.28M
- −790.1K (−25.7%) vs. Q1 2025Converted for a 1-for-20 split
- Total value
- $25.4M
- −$17.7M (−41.0%) vs. Q1 2025
- New holders
- 8
- 8 more added
- Sold out
- 37
- 10 more reduced
1 institution that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MCRB on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 35 | $17.9M |
| Q1 2026 | 33 | $20.5M |
| Q4 2025 | 36 | $36.4M |
| Q3 2025 | 32 | $40.9M |
| Q2 2025 | 33 | $25.4M |
| Q1 2025 | 63 | $43.1M |
| Q4 2024 | 69 | $52.5M |
| Q3 2024 | 77 | $60.1M |
| Q2 2024 | 93 | $50.0M |
| Q1 2024 | 99 | $66.3M |
| Q4 2023 | 103 | $125.4M |
| Q3 2023 | 134 | $255.6M |
| Q2 2023 | 138 | $538.1M |
| Q1 2023 | 123 | $593.9M |
| Q4 2022 | 124 | $588.2M |
| Q3 2022 | 120 | $671.6M |
| Q2 2022 | 123 | $312.7M |
| Q1 2022 | 131 | $537.2M |
| Q4 2021 | 148 | $642.8M |
| Q3 2021 | 133 | $555.1M |
| Q2 2021 | 147 | $1.93B |
| Q1 2021 | 154 | $1.85B |
Institutions, Q2 2025
Shares, value and share of portfolio for each institution holding Seres Therapeutics, Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Flagship Pioneering Inc. | 1,155,850 | $12.8M | 4.78% | 00.0% | UnchangedConverted for a 1-for-20 split |
| Vanguard Group Inc | 292,096 | $3.25M | 0.00% | −12,504−4.1% | ReducedConverted for a 1-for-20 split |
| FMR LLC | 268,704 | $2.99M | 0.00% | −825,768−75.4% | ReducedConverted for a 1-for-20 split |
| BlackRock, Inc. | 101,351 | $1.13M | 0.00% | +13,243+15.0% | AddedConverted for a 1-for-20 split |
| Geode Capital Management, LLC | 91,602 | $1.02M | 0.00% | +10,663+13.2% | AddedConverted for a 1-for-20 split |
| Marshall Wace, LLP | 91,405 | $1.02M | 0.00% | +91,405 | New |
| Vontobel Holding Ltd. | 80,325 | $892.4K | 0.00% | +26,027+47.9% | AddedConverted for a 1-for-20 split |
| Charles Schwab Investment Management Inc | 34,876 | $387.5K | 0.00% | −6,829−16.4% | ReducedConverted for a 1-for-20 split |
| State Street Corp | 26,831 | $298.1K | 0.00% | +1,794+7.2% | AddedConverted for a 1-for-20 split |
| XTX Topco Ltd | 22,417 | $249.1K | 0.01% | +22,417 | New |
| Squarepoint Ops LLC | 20,908 | $232.3K | 0.00% | +20,908 | New |
| Lion Point Capital, LP | 17,038 | $189.3K | 1.29% | 00.0% | UnchangedConverted for a 1-for-20 split |
| Northern Trust Corp | 15,076 | $167.5K | 0.00% | 00.0% | UnchangedConverted for a 1-for-20 split |
| Tang Capital Management LLC | 13,921 | $154.7K | 0.01% | +3,726+36.5% | AddedConverted for a 1-for-20 split |
| Bridgeway Capital Management, LLC | 12,500 | $138.9K | 0.00% | 00.0% | UnchangedConverted for a 1-for-20 split |
| Susquehanna International Group, LLP | 11,684 | $129.8K | 0.00% | −24,173−67.4% | ReducedConverted for a 1-for-20 split |
| Morgan Stanley | 7,838 | $87.1K | 0.00% | +358+4.8% | AddedConverted for a 1-for-20 split |
| UBS Group AG | 7,532 | $83.7K | 0.00% | −65,276−89.7% | ReducedConverted for a 1-for-20 split |
| Royal Bank of Canada | 6,954 | $77.0K | 0.00% | +6,732+3,029.6% | AddedConverted for a 1-for-20 split |
| SBI Securities Co., Ltd. | 3,482 | $38.7K | 0.00% | 00.0% | UnchangedConverted for a 1-for-20 split |
| Group One Trading, L.P. | 1,161 | $12.9K | 0.00% | +26+2.3% | AddedConverted for a 1-for-20 split |
| Atlantic Union Bankshares Corp | 411 | $4.57K | 0.00% | +411 | New |
| BNP Paribas Arbitrage, SA | 305 | $3.39K | 0.00% | −2−0.6% | ReducedConverted for a 1-for-20 split |
| Bank of America Corp | 186 | $2.07K | 0.00% | −112−37.5% | ReducedConverted for a 1-for-20 split |
| Tower Research Capital LLC (TRC) | 185 | $2.06K | 0.00% | +185 | New |
| UMA Financial Services, Inc. | 142 | $1.58K | 0.00% | +142 | New |
| JPMorgan Chase & Co | 65 | $722 | 0.00% | 00.0% | UnchangedConverted for a 1-for-20 split |
| Raymond James Financial Inc | 56 | $623 | 0.00% | +56 | New |
| US Bancorp | 25 | $278 | 0.00% | +25 | New |
| Wells Fargo & Company | 10 | $111 | 0.00% | −380−97.4% | ReducedConverted for a 1-for-20 split |
| Citigroup Inc | 9 | $100 | 0.00% | −2−16.3% | ReducedConverted for a 1-for-20 split |
| Advisor Group Holdings, Inc. | 8 | $88 | 0.00% | 00.0% | UnchangedConverted for a 1-for-20 split |
| Whittier Trust Co | 1 | $11 | 0.00% | −1−33.3% | ReducedConverted for a 1-for-20 split |
| Invesco Ltd. | 0 | $0 | 0.00% | −6,829−100.0% | Sold outConverted for a 1-for-20 split |
| Providence Wealth Advisors, LLC | 0 | $0 | 0.00% | −5,250−100.0% | Sold outConverted for a 1-for-20 split |
| LPL Financial LLC | 0 | $0 | 0.00% | −4,757−100.0% | Sold outConverted for a 1-for-20 split |
| Goldman Sachs Group Inc | 0 | $0 | 0.00% | −3,731−100.0% | Sold outConverted for a 1-for-20 split |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −3,099−100.0% | Sold outConverted for a 1-for-20 split |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −2,565−100.0% | Sold outConverted for a 1-for-20 split |
| JustInvest LLC | 0 | $0 | 0.00% | −2,536−100.0% | Sold outConverted for a 1-for-20 split |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −2,382−100.0% | Sold outConverted for a 1-for-20 split |
| Avantax Advisory Services, Inc. | 0 | $0 | 0.00% | −2,259−100.0% | Sold outConverted for a 1-for-20 split |
| Kestra Advisory Services, LLC | 0 | $0 | 0.00% | −1,924−100.0% | Sold outConverted for a 1-for-20 split |
| Cantor Fitzgerald, L. P. | 0 | $0 | 0.00% | −1,874−100.0% | Sold outConverted for a 1-for-20 split |
| Ironwood Investment Management LLC | 0 | $0 | 0.00% | −1,825−100.0% | Sold outConverted for a 1-for-20 split |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −1,616−100.0% | Sold outConverted for a 1-for-20 split |
| Millennium Management LLC | 0 | $0 | 0.00% | −1,478−100.0% | Sold outConverted for a 1-for-20 split |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −1,279−100.0% | Sold outConverted for a 1-for-20 split |
| Arete Wealth Advisors, LLC | 0 | $0 | 0.00% | −1,045−100.0% | Sold outConverted for a 1-for-20 split |
| Stifel Financial Corp | 0 | $0 | 0.00% | −1,000−100.0% | Sold outConverted for a 1-for-20 split |
| Janney Montgomery Scott LLC | 0 | $0 | 0.00% | −1,000−100.0% | Sold outConverted for a 1-for-20 split |
| MML Investors Services, LLC | 0 | $0 | 0.00% | −793−100.0% | Sold outConverted for a 1-for-20 split |
| Victory Capital Management Inc | 0 | $0 | 0.00% | −767−100.0% | Sold outConverted for a 1-for-20 split |
| Aries Wealth Management | 0 | $0 | 0.00% | −750−100.0% | Sold outConverted for a 1-for-20 split |
| Miller Financial Services LLC | 0 | $0 | 0.00% | −750−100.0% | Sold outConverted for a 1-for-20 split |
| Captrust Financial Advisors | 0 | $0 | 0.00% | −655−100.0% | Sold outConverted for a 1-for-20 split |
| Peapack Gladstone Financial Corp | 0 | $0 | 0.00% | −650−100.0% | Sold outConverted for a 1-for-20 split |
| Mission Wealth Management, LP | 0 | $0 | 0.00% | −575−100.0% | Sold outConverted for a 1-for-20 split |
| Commonwealth Equity Services, LLC | 0 | $0 | 0.00% | −580−100.0% | Sold outConverted for a 1-for-20 split |
| Diversified Trust Co | 0 | $0 | 0.00% | −500−100.0% | Sold outConverted for a 1-for-20 split |
| Integrated Wealth Concepts LLC | 0 | $0 | 0.00% | −500−100.0% | Sold outConverted for a 1-for-20 split |
| Barclays PLC | 0 | $0 | 0.00% | −80−100.0% | Sold outConverted for a 1-for-20 split |
| TFC Financial Management | 0 | $0 | 0.00% | −50−100.0% | Sold outConverted for a 1-for-20 split |
| Continuum Advisory, LLC | 0 | $0 | 0.00% | −48−100.0% | Sold outConverted for a 1-for-20 split |
| EverSource Wealth Advisors, LLC | 0 | $0 | 0.00% | −33−100.0% | Sold outConverted for a 1-for-20 split |
| Nisa Investment Advisors, LLC | 0 | $0 | 0.00% | −10−100.0% | Sold outConverted for a 1-for-20 split |
| Farther Finance Advisors, LLC | 0 | $0 | 0.00% | −10−100.0% | Sold outConverted for a 1-for-20 split |
| Sound Income Strategies, LLC | 0 | $0 | 0.00% | −9−100.0% | Sold outConverted for a 1-for-20 split |
| Jones Financial Companies LLLP | 0 | $0 | 0.00% | −2−100.0% | Sold outConverted for a 1-for-20 split |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −2−100.0% | Sold outConverted for a 1-for-20 split |
| Sandy Spring Bank | – | – | – | – | Not filed |