| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| FMR LLC | 3.1% | -43% | $3,377,609 | -$2,827,043 | 268,704 | -46% | FMR LLC | 30 Jun 2025 |
As of 31 Dec 2025, 35 institutional investors reported holding 2,441,565 shares of Seres Therapeutics, Inc. - COMMON STOCK (MCRB). This represents 28% of the company’s total 8,667,871 outstanding shares.
The largest institutional shareholders of Seres Therapeutics, Inc. - COMMON STOCK (MCRB) together control 28% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Flagship Pioneering, LLC | 13% | 1,155,850 | 0% | 5.3% | $17,236,411 |
| VANGUARD GROUP INC | 3.7% | 324,214 | +4% | 0% | $4,824,304 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 2.1% | 179,929 | 0% | $2,677,344 | |
| MARSHALL WACE, LLP | 1.4% | 120,177 | -4.3% | 0% | $1,788,234 |
| BlackRock, Inc. | 1.2% | 103,621 | +1.5% | 0% | $1,541,880 |
| Vontobel Holding Ltd. | 1.2% | 103,234 | +4.8% | 0.01% | $1,536,122 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.99% | 86,142 | +1.4% | 0% | $1,282,308 |
| 683 Capital Management, LLC | 0.6% | 52,314 | 0.06% | $778,432 | |
| STATE STREET CORP | 0.39% | 33,901 | +14% | 0% | $504,447 |
| Lion Point Capital, LP | 0.36% | 31,570 | +16% | 2.4% | $469,762 |
| CITADEL ADVISORS LLC | 0.36% | 31,418 | +1.7% | 0% | $467,500 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.36% | 31,369 | -0.11% | 0% | $466,771 |
| Schonfeld Strategic Advisors LLC | 0.34% | 29,097 | +0.54% | 0% | $432,961 |
| TWO SIGMA INVESTMENTS, LP | 0.3% | 25,749 | 0% | $383,145 | |
| MORGAN STANLEY | 0.29% | 25,126 | +37% | 0% | $373,874 |
| AMERICAN CENTURY COMPANIES INC | 0.19% | 16,271 | 0% | $242,112 | |
| NORTHERN TRUST CORP | 0.17% | 14,765 | +22% | 0% | $219,704 |
| OMERS ADMINISTRATION Corp | 0.17% | 14,400 | 0% | $214,272 | |
| Invesco Ltd. | 0.17% | 14,360 | +38% | 0% | $213,677 |
| GOLDMAN SACHS GROUP INC | 0.17% | 14,340 | 0% | $213,379 | |
| ExodusPoint Capital Management, LP | 0.15% | 12,737 | 0% | $189,527 | |
| BARCLAYS PLC | 0.09% | 7,432 | +428% | 0% | $110,588 |
| UBS Group AG | 0.05% | 4,226 | -67% | 0% | $62,883 |
| SBI Securities Co., Ltd. | 0.04% | 3,482 | 0% | 0% | $51,812 |
| FMR LLC | 0.02% | 1,740 | -7.5% | 0% | $25,891 |