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, Q3 2025
Institutional positions in Seres Therapeutics, Inc. as of Sep 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
- 32
- −1 vs. Q2 2025
- Shares held
- 2.13M
- −159.1K (−7.0%) vs. Q2 2025
- Total value
- $40.9M
- +$15.5M (+61.1%) vs. Q2 2025
- New holders
- 9
- 10 more added
- Sold out
- 10
- 7 more reduced
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Seres Therapeutics, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Flagship Pioneering Inc. | 1,155,850 | $22.2M | 7.60% | 00.0% | Unchanged |
| Vanguard Group Inc | 311,889 | $6.00M | 0.00% | +19,793+6.8% | Added |
| Marshall Wace, LLP | 125,600 | $2.42M | 0.00% | +34,195+37.4% | Added |
| BlackRock, Inc. | 102,060 | $1.96M | 0.00% | +709+0.7% | Added |
| Vontobel Holding Ltd. | 98,511 | $1.90M | 0.01% | +18,186+22.6% | Added |
| Geode Capital Management, LLC | 84,982 | $1.64M | 0.00% | −6,620−7.2% | Reduced |
| Charles Schwab Investment Management Inc | 31,403 | $604.2K | 0.00% | −3,473−10.0% | Reduced |
| Citadel Advisors LLC | 30,885 | $594.2K | 0.00% | +30,885 | New |
| State Street Corp | 29,731 | $572.0K | 0.00% | +2,900+10.8% | Added |
| Schonfeld Strategic Advisors LLC | 28,942 | $556.8K | 0.00% | +28,942 | New |
| Lion Point Capital, LP | 27,138 | $522.1K | 2.97% | +10,100+59.3% | Added |
| J. Goldman & Co LP | 27,000 | $519.5K | 0.02% | +27,000 | New |
| Morgan Stanley | 18,334 | $352.7K | 0.00% | +10,496+133.9% | Added |
| UBS Group AG | 12,682 | $244.0K | 0.00% | +5,150+68.4% | Added |
| Northern Trust Corp | 12,101 | $232.8K | 0.00% | −2,975−19.7% | Reduced |
| Invesco Ltd. | 10,442 | $200.9K | 0.00% | +10,442 | New |
| Bank of America Corp | 5,343 | $102.8K | 0.00% | +5,157+2,772.6% | Added |
| SBI Securities Co., Ltd. | 3,482 | $67.0K | 0.00% | 00.0% | Unchanged |
| Simplex Trading, LLC | 2,807 | $54.0K | 0.00% | +2,807 | New |
| Citigroup Inc | 2,621 | $50.4K | 0.00% | +2,612+29,022.2% | Added |
| FMR LLC | 1,882 | $36.2K | 0.00% | −266,822−99.3% | Reduced |
| Barclays PLC | 1,408 | $27.1K | 0.00% | +1,408 | New |
| Royal Bank of Canada | 296 | $6.00K | 0.00% | −6,658−95.7% | Reduced |
| BNP Paribas Arbitrage, SA | 212 | $4.08K | 0.00% | −93−30.5% | Reduced |
| UMA Financial Services, Inc. | 142 | $2.73K | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 65 | $1.25K | 0.00% | 00.0% | Unchanged |
| US Bancorp | 12 | $231 | 0.00% | −13−52.0% | Reduced |
| Wells Fargo & Company | 10 | $192 | 0.00% | 00.0% | Unchanged |
| Sound Income Strategies, LLC | 8 | $156 | 0.00% | +8 | New |
| Advisor Group Holdings, Inc. | 8 | $151 | 0.00% | 00.0% | Unchanged |
| Federation des caisses Desjardins du Quebec | 3 | $58 | 0.00% | +3 | New |
| SRS Capital Advisors, Inc. | 2 | $38 | 0.00% | +2 | New |
| XTX Topco Ltd | 0 | $0 | 0.00% | −22,417−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −20,908−100.0% | Sold out |
| Tang Capital Management LLC | 0 | $0 | 0.00% | −13,921−100.0% | Sold out |
| Bridgeway Capital Management, LLC | 0 | $0 | 0.00% | −12,500−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −11,684−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −1,161−100.0% | Sold out |
| Atlantic Union Bankshares Corp | 0 | $0 | 0.00% | −411−100.0% | Sold out |
| Tower Research Capital LLC (TRC) | 0 | $0 | 0.00% | −185−100.0% | Sold out |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −56−100.0% | Sold out |
| Whittier Trust Co | 0 | $0 | 0.00% | −1−100.0% | Sold out |