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, Q4 2025
Institutional positions in Seres Therapeutics, Inc. as of Dec 31, 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
- 36
- +4 vs. Q3 2025
- Shares held
- 2.44M
- +315.7K (+14.9%) vs. Q3 2025
- Total value
- $36.4M
- −$4.53M (−11.1%) vs. Q3 2025
- New holders
- 9
- 14 more added
- Sold out
- 5
- 7 more reduced
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Seres Therapeutics, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Flagship Pioneering Inc. | 1,155,850 | $17.2M | 5.32% | 00.0% | Unchanged |
| Vanguard Group Inc | 324,214 | $4.82M | 0.00% | +12,325+4.0% | Added |
| Susquehanna International Group, LLP | 179,929 | $2.68M | 0.00% | +179,929 | New |
| Marshall Wace, LLP | 120,177 | $1.79M | 0.00% | −5,423−4.3% | Reduced |
| BlackRock, Inc. | 103,621 | $1.54M | 0.00% | +1,561+1.5% | Added |
| Vontobel Holding Ltd. | 103,234 | $1.54M | 0.01% | +4,723+4.8% | Added |
| Geode Capital Management, LLC | 86,142 | $1.28M | 0.00% | +1,160+1.4% | Added |
| 683 Capital Management, LLC | 52,314 | $778.4K | 0.06% | +52,314 | New |
| State Street Corp | 33,901 | $504.4K | 0.00% | +4,170+14.0% | Added |
| Lion Point Capital, LP | 31,570 | $469.8K | 2.43% | +4,432+16.3% | Added |
| Citadel Advisors LLC | 31,418 | $467.5K | 0.00% | +533+1.7% | Added |
| Charles Schwab Investment Management Inc | 31,369 | $466.8K | 0.00% | −34−0.1% | Reduced |
| Schonfeld Strategic Advisors LLC | 29,097 | $433.0K | 0.00% | +155+0.5% | Added |
| Two Sigma Investments, LP | 25,749 | $383.1K | 0.00% | +25,749 | New |
| Morgan Stanley | 25,126 | $373.9K | 0.00% | +6,792+37.0% | Added |
| American Century Companies Inc | 16,271 | $242.1K | 0.00% | +16,271 | New |
| Northern Trust Corp | 14,765 | $219.7K | 0.00% | +2,664+22.0% | Added |
| Omers Administration Corp | 14,400 | $214.3K | 0.00% | +14,400 | New |
| Invesco Ltd. | 14,360 | $213.7K | 0.00% | +3,918+37.5% | Added |
| Goldman Sachs Group Inc | 14,340 | $213.4K | 0.00% | +14,340 | New |
| ExodusPoint Capital Management, LP | 12,737 | $189.5K | 0.00% | +12,737 | New |
| Barclays PLC | 7,432 | $110.6K | 0.00% | +6,024+427.8% | Added |
| UBS Group AG | 4,226 | $62.9K | 0.00% | −8,456−66.7% | Reduced |
| SBI Securities Co., Ltd. | 3,482 | $51.8K | 0.00% | 00.0% | Unchanged |
| FMR LLC | 1,740 | $25.9K | 0.00% | −142−7.5% | Reduced |
| Rachor Investment Advisory Services, LLC | 1,477 | $22.0K | 0.01% | +1,477 | New |
| Simplex Trading, LLC | 1,232 | $18.3K | 0.00% | −1,575−56.1% | Reduced |
| BNP Paribas Arbitrage, SA | 773 | $11.5K | 0.00% | +561+264.6% | Added |
| Wells Fargo & Company | 260 | $3.87K | 0.00% | +250+2,500.0% | Added |
| Bank of America Corp | 195 | $2.90K | 0.00% | −5,148−96.4% | Reduced |
| UMA Financial Services, Inc. | 142 | $2.11K | 0.00% | 00.0% | Unchanged |
| Sound Income Strategies, LLC | 8 | $128 | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 8 | $119 | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 4 | $60 | 0.00% | +4 | New |
| SRS Capital Advisors, Inc. | 2 | $30 | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 9 | $0 | 0.00% | −287−97.0% | Reduced |
| J. Goldman & Co LP | 0 | $0 | 0.00% | −27,000−100.0% | Sold out |
| Citigroup Inc | 0 | $0 | 0.00% | −2,621−100.0% | Sold out |
| JPMorgan Chase & Co | 0 | $0 | 0.00% | −65−100.0% | Sold out |
| US Bancorp | 0 | $0 | 0.00% | −12−100.0% | Sold out |
| Federation des caisses Desjardins du Quebec | 0 | $0 | 0.00% | −3−100.0% | Sold out |