Seres Therapeutics, Inc. - MCRB
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Flagship Pioneering, LLC | History | No change | 1,155,850 | 17,236 | 5.32% | 7.6% | 1 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Reduced | 332,829 | 4,952 | 0.0% | 0.0% | 2 | -60,071 | -15.29% | Q4 2025 | Feb 17, 2026 |
| VANGUARD GROUP INC | History | Added to | 324,214 | 4,824 | 0.0% | 0.0% | 3 | +12,325 | 3.95% | Q4 2025 | Jan 29, 2026 |
| MARSHALL WACE, LLP | History | Reduced | 120,177 | 1,788 | 0.0% | 0.0% | 4 | -5,423 | -4.32% | Q4 2025 | Feb 13, 2026 |
| BlackRock, Inc. | History | Added to | 103,621 | 1,541 | 0.0% | 0.0% | 5 | +1,561 | 1.53% | Q4 2025 | Feb 12, 2026 |
| Vontobel Holding Ltd. | History | Added to | 103,234 | 1,536 | 0.0% | 0.01% | 6 | +4,723 | 4.79% | Q4 2025 | Feb 13, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Added to | 86,142 | 1,282 | 0.0% | 0.0% | 7 | +1,160 | 1.36% | Q4 2025 | Feb 09, 2026 |
| Caption Management, LLC | History | No change | 75,000 | 1,116 | 0.01% | 0.01% | 8 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| CITADEL ADVISORS LLC | History | Reduced | 74,248 | 1,104 | 0.0% | 0.0% | 9 | -10,977 | -12.88% | Q4 2025 | Feb 17, 2026 |
| 683 Capital Management, LLC | History | New | 52,314 | 778 | 0.03% | — | 10 | +52,314 | New | Q4 2025 | Feb 17, 2026 |
| STATE STREET CORP | History | Added to | 33,901 | 504 | 0.0% | 0.0% | 11 | +4,170 | 14.03% | Q4 2025 | Feb 13, 2026 |
| Lion Point Capital, LP | History | Added to | 31,570 | 469 | 2.43% | 2.97% | 12 | +4,432 | 16.33% | Q4 2025 | Feb 17, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | History | Reduced | 31,369 | 466 | 0.0% | 0.0% | 13 | -34 | -0.11% | Q4 2025 | Feb 13, 2026 |
| JANE STREET GROUP, LLC | History | Reduced | 29,905 | 444 | 0.0% | 0.0% | 14 | -38,195 | -56.09% | Q4 2025 | Feb 12, 2026 |
| Schonfeld Strategic Advisors LLC | History | Added to | 29,097 | 432 | 0.0% | 0.0% | 15 | +155 | 0.54% | Q4 2025 | Feb 17, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | New | 25,749 | 383 | 0.0% | — | 16 | +25,749 | New | Q4 2025 | Feb 17, 2026 |
| MORGAN STANLEY | History | Added to | 25,126 | 373 | 0.0% | 0.0% | 17 | +6,792 | 37.05% | Q4 2025 | Feb 13, 2026 |
| GROUP ONE TRADING LLC | History | Reduced | 19,800 | 294 | 0.0% | 0.0% | 18 | -200 | -1.0% | Q4 2025 | Feb 12, 2026 |
| AMERICAN CENTURY COMPANIES INC | History | New | 16,271 | 242 | 0.0% | — | 19 | +16,271 | New | Q4 2025 | Feb 13, 2026 |
| NORTHERN TRUST CORP | History | Added to | 14,765 | 219 | 0.0% | 0.0% | 20 | +2,664 | 22.01% | Q4 2025 | Feb 17, 2026 |
| OMERS ADMINISTRATION Corp | History | New | 14,400 | 214 | 0.0% | — | 21 | +14,400 | New | Q4 2025 | Feb 13, 2026 |
| GOLDMAN SACHS GROUP INC | History | New | 14,340 | 213 | 0.0% | — | 22 | +14,340 | New | Q4 2025 | Mar 25, 2026 |
| Invesco Ltd. | History | Added to | 14,360 | 213 | 0.0% | 0.0% | 23 | +3,918 | 37.52% | Q4 2025 | Feb 19, 2026 |
| ExodusPoint Capital Management, LP | History | New | 12,737 | 189 | 0.0% | — | 24 | +12,737 | New | Q4 2025 | Feb 17, 2026 |
| SIMPLEX TRADING, LLC | History | Reduced | 10,932 | 162 | 0.0% | 0.0% | 25 | -3,375 | -23.59% | Q4 2025 | Feb 11, 2026 |
| BARCLAYS PLC | History | Added to | 7,432 | 110 | 0.0% | 0.0% | 26 | +6,024 | 427.84% | Q4 2025 | Feb 13, 2026 |
| UBS Group AG | History | Reduced | 4,226 | 62 | 0.0% | 0.0% | 27 | -8,456 | -66.68% | Q4 2025 | Jan 29, 2026 |
| SBI Securities Co., Ltd. | History | No change | 3,482 | 51 | 0.0% | 0.0% | 28 | 0 | 0.0% | Q4 2025 | Feb 03, 2026 |
| FMR LLC | History | Reduced | 1,740 | 25 | 0.0% | 0.0% | 29 | -142 | -7.55% | Q4 2025 | Feb 17, 2026 |
| Rachor Investment Advisory Services, LLC | History | New | 1,477 | 21 | 0.01% | — | 30 | +1,477 | New | Q4 2025 | Jan 30, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | Added to | 773 | 11 | 0.0% | 0.0% | 31 | +561 | 264.62% | Q4 2025 | Feb 10, 2026 |
| WELLS FARGO & COMPANY/MN | History | Added to | 260 | 3 | 0.0% | — | 32 | +250 | 2500.0% | Q4 2025 | Feb 13, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Reduced | 195 | 2 | 0.0% | 0.0% | 33 | -5,148 | -96.35% | Q4 2025 | Feb 17, 2026 |
| Physician Wealth Advisors, Inc. | History | No change | 142 | 2 | 0.0% | 0.0% | 34 | 0 | 0.0% | Q4 2025 | Jan 29, 2026 |
| Hudson Bay Capital Management LP | History | Closed out | 0 | 0 | — | 0.01% | — | -125,000 | -100.0% | Q3 2025 | Dec 15, 2025 |
| J. Goldman & Co LP | History | Closed out | 0 | 0 | — | 0.04% | — | -88,900 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Centiva Capital, LP | History | Closed out | 0 | 0 | — | 0.0% | — | -25,000 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Belvedere Trading LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -12,200 | -100.0% | Q3 2025 | Oct 27, 2025 |
| CITIGROUP INC | History | Closed out | 0 | 0 | — | 0.0% | — | -2,621 | -100.0% | Q3 2025 | Nov 10, 2025 |
| JPMORGAN CHASE & CO | History | Closed out | 0 | 0 | — | 0.0% | — | -65 | -100.0% | Q3 2025 | Nov 26, 2025 |
| NATIONAL BANK OF CANADA /FI/ | History | Closed out | 0 | 0 | — | 0.0% | — | -26 | -100.0% | Q3 2025 | Nov 14, 2025 |
| US BANCORP \DE\ | History | Closed out | 0 | 0 | — | — | — | -12 | -100.0% | Q3 2025 | Nov 12, 2025 |
| ROYAL BANK OF CANADA | History | New | 9 | 0 | — | — | — | +9 | New | Q4 2025 | Feb 17, 2026 |
| Allworth Financial LP | History | New | 4 | 0 | — | — | — | +4 | New | Q4 2025 | Feb 05, 2026 |
| Federation des caisses Desjardins du Quebec | History | Closed out | 0 | 0 | — | — | — | -3 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Arax Advisory Partners | History | No change | 2 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| OSAIC HOLDINGS, INC. | History | No change | 8 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Sound Income Strategies, LLC | History | No change | 8 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Jan 21, 2026 |