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 2026
Institutional positions in Seres Therapeutics, Inc. as of Jun 30, 2026. 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
- 35
- +2 vs. Q1 2026
- Shares held
- 2.27M
- −36.1K (−1.6%) vs. Q1 2026
- Total value
- $17.9M
- −$2.55M (−12.4%) vs. Q1 2026
- New holders
- 7
- 7 more added
- Sold out
- 5
- 12 more reduced
Compare with Q1 2026: 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 2026
Shares, value and share of portfolio for each institution holding Seres Therapeutics, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Royal Bank of Canada | 11 | $0 | 0.00% | −96−89.7% | Reduced |
| Whittier Trust Co of Nevada Inc | 1 | $8 | 0.00% | +1 | New |
| Larson Financial Group LLC | 5 | $39 | 0.00% | +5 | New |
| Advisor Group Holdings, Inc. | 8 | $63 | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 10 | $79 | 0.00% | 00.0% | Unchanged |
| Continuum Advisory, LLC | 47 | $371 | 0.00% | +47 | New |
| Barclays PLC | 167 | $1.32K | 0.00% | −6,340−97.4% | Reduced |
| BNP Paribas Arbitrage, SA | 211 | $1.67K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 316 | $2.49K | 0.00% | −478−60.2% | Reduced |
| UBS Group AG | 484 | $3.82K | 0.00% | −6,546−93.1% | Reduced |
| Rachor Investment Advisory Services, LLC | 1,477 | $11.7K | 0.01% | 00.0% | Unchanged |
| FMR LLC | 1,528 | $12.1K | 0.00% | −224−12.8% | Reduced |
| Vanguard Global Advisers, LLC | 1,975 | $15.6K | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 3,636 | $28.3K | 0.00% | +3,636 | New |
| Group One Trading, L.P. | 3,714 | $29.3K | 0.00% | +2,890+350.7% | Added |
| SBI Securities Co., Ltd. | 4,182 | $33.0K | 0.00% | +700+20.1% | Added |
| Simplex Trading, LLC | 4,598 | $36.3K | 0.00% | +1,528+49.8% | Added |
| Citadel Advisors LLC | 10,504 | $82.9K | 0.00% | +10,504 | New |
| Morgan Stanley | 12,138 | $95.8K | 0.00% | −9,562−44.1% | Reduced |
| Invesco Ltd. | 12,974 | $102.4K | 0.00% | −1,573−10.8% | Reduced |
| Northern Trust Corp | 14,765 | $116.5K | 0.00% | 00.0% | Unchanged |
| Goldman Sachs Group Inc | 15,229 | $120.2K | 0.00% | +15,229 | New |
| XTX Topco Ltd | 20,732 | $163.6K | 0.00% | +20,732 | New |
| American Century Companies Inc | 28,313 | $223.4K | 0.00% | −34,003−54.6% | Reduced |
| Charles Schwab Investment Management Inc | 31,049 | $245.0K | 0.00% | −581−1.8% | Reduced |
| Lion Point Capital, LP | 31,570 | $249.1K | 1.19% | 00.0% | Unchanged |
| State Street Corp | 33,901 | $267.5K | 0.00% | 00.0% | Unchanged |
| Vanguard Fiduciary Trust Co | 48,685 | $384.1K | 0.00% | +9,042+22.8% | Added |
| Susquehanna International Group, LLP | 58,328 | $460.2K | 0.00% | −47,011−44.6% | Reduced |
| Geode Capital Management, LLC | 79,974 | $631.3K | 0.00% | +5,139+6.9% | Added |
| BlackRock, Inc. | 111,000 | $875.8K | 0.00% | +8,974+8.8% | Added |
| Vontobel Holding Ltd. | 122,975 | $970.3K | 0.00% | −15,493−11.2% | Reduced |
| Marshall Wace, LLP | 172,245 | $1.36M | 0.00% | +32,706+23.4% | Added |
| Vanguard Capital Management LLC | 287,776 | $2.27M | 0.00% | −6,367−2.2% | Reduced |
| Flagship Pioneering Inc. | 1,155,850 | $9.12M | 0.59% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −18,794−100.0% | Sold out |
| UMA Financial Services, Inc. | 0 | $0 | 0.00% | −142−100.0% | Sold out |
| Sound Income Strategies, LLC | 0 | $0 | 0.00% | −8−100.0% | Sold out |
| Allworth Financial LP | 0 | $0 | 0.00% | −4−100.0% | Sold out |
| SRS Capital Advisors, Inc. | 0 | $0 | 0.00% | −6−100.0% | Sold out |