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 | 9,119 | 0.59% | 0.59% | 1 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | History | No change | 287,776 | 2,270 | 0.0% | 0.0% | 2 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| MARSHALL WACE, LLP | History | No change | 172,245 | 1,359 | 0.0% | 0.0% | 3 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | No change | 133,228 | 1,051 | 0.0% | 0.0% | 4 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| BlackRock, Inc. | History | No change | 111,000 | 875 | 0.0% | 0.0% | 5 | 0 | 0.0% | Q2 2026 | Aug 07, 2026 |
| CITADEL ADVISORS LLC | History | No change | 54,004 | 426 | 0.0% | 0.0% | 6 | 0 | 0.0% | Q2 2026 | Sep 02, 2026 |
| VANGUARD FIDUCIARY TRUST CO | History | No change | 48,685 | 384 | 0.0% | 0.0% | 7 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| Vontobel Holding Ltd. | History | Reduced | 114,566 | 383 | 0.0% | 0.0% | 8 | -8,409 | -6.84% | Q3 2026 | Oct 16, 2026 |
| STATE STREET CORP | History | No change | 33,901 | 267 | 0.0% | 0.0% | 9 | 0 | 0.0% | Q2 2026 | Sep 22, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Reduced | 78,898 | 264 | 0.0% | 0.0% | 10 | -1,076 | -1.35% | Q3 2026 | Nov 06, 2026 |
| Lion Point Capital, LP | History | No change | 31,570 | 249 | 1.19% | 1.19% | 11 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | History | No change | 31,049 | 244 | 0.0% | 0.0% | 12 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| AMERICAN CENTURY COMPANIES INC | History | No change | 28,313 | 223 | 0.0% | 0.0% | 13 | 0 | 0.0% | Q2 2026 | Aug 12, 2026 |
| GROUP ONE TRADING LLC | History | No change | 24,114 | 190 | 0.0% | 0.0% | 14 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| XTX Topco Ltd | History | No change | 20,732 | 163 | 0.0% | 0.0% | 15 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| GOLDMAN SACHS GROUP INC | History | No change | 15,229 | 120 | 0.0% | 0.0% | 16 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| NORTHERN TRUST CORP | History | No change | 14,765 | 116 | 0.0% | 0.0% | 17 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| Invesco Ltd. | History | No change | 12,974 | 102 | 0.0% | 0.0% | 18 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| MORGAN STANLEY | History | No change | 12,138 | 95 | 0.0% | 0.0% | 19 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| J. Safra Sarasin Holding AG | History | New | 14,997 | 50 | 0.0% | — | 20 | +14,997 | New | Q3 2026 | Oct 26, 2026 |
| Squarepoint Ops LLC | History | New | 11,523 | 38 | 0.0% | — | 21 | +11,523 | New | Q3 2026 | Nov 09, 2026 |
| JPMORGAN CHASE & CO | History | No change | 3,636 | 28 | 0.0% | 0.0% | 22 | 0 | 0.0% | Q2 2026 | Aug 12, 2026 |
| Vanguard Global Advisers, LLC | History | No change | 1,975 | 15 | 0.0% | 0.0% | 23 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| SBI Securities Co., Ltd. | History | Reduced | 3,601 | 12 | 0.0% | 0.0% | 24 | -581 | -13.89% | Q3 2026 | Oct 21, 2026 |
| Nuveen, LLC | History | New | 1,773 | 6 | 0.0% | — | 25 | +1,773 | New | Q3 2026 | Nov 10, 2026 |
| FMR LLC | History | Added to | 1,730 | 5 | 0.0% | 0.0% | 26 | +202 | 13.22% | Q3 2026 | Nov 10, 2026 |
| Rachor Investment Advisory Services, LLC | History | Reduced | 1,185 | 3 | 0.0% | 0.01% | 28 | -292 | -19.77% | Q3 2026 | Oct 29, 2026 |
| UBS Group AG | History | No change | 484 | 3 | 0.0% | 0.0% | 27 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| Tower Research Capital LLC (TRC) | History | No change | 316 | 2 | 0.0% | 0.0% | 29 | 0 | 0.0% | Q2 2026 | Aug 11, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | No change | 211 | 1 | 0.0% | 0.0% | 30 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| SIMPLEX TRADING, LLC | History | Reduced | 218 | 0 | — | 0.0% | — | -11,280 | -98.1% | Q3 2026 | Nov 04, 2026 |
| BARCLAYS PLC | History | Reduced | 4 | 0 | — | 0.0% | — | -163 | -97.6% | Q3 2026 | Nov 06, 2026 |
| PNC FINANCIAL SERVICES GROUP, INC. | History | New | 23 | 0 | — | — | — | +23 | New | Q3 2026 | Nov 06, 2026 |
| Allworth Financial LP | History | New | 4 | 0 | — | — | — | +4 | New | Q3 2026 | Nov 06, 2026 |
| WELLS FARGO & COMPANY/MN | History | No change | 10 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| ROYAL BANK OF CANADA | History | No change | 11 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| WHITTIER TRUST CO OF NEVADA INC | History | No change | 1 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Jul 27, 2026 |
| OSAIC HOLDINGS, INC. | History | No change | 8 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| Larson Financial Group LLC | History | No change | 5 | 0 | — | — | — | 0 | 0.0% | Q3 2026 | Nov 05, 2026 |
| Continuum Advisory, LLC | History | No change | 47 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Aug 06, 2026 |