| 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 30 Sep 2025, 32 institutional investors reported holding 2,125,842 shares of Seres Therapeutics, Inc. - COMMON STOCK (MCRB). This represents 25% of the company’s total 8,667,871 outstanding shares.
The largest institutional shareholders of Seres Therapeutics, Inc. - COMMON STOCK (MCRB) together control 25% 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 Inc. | 13% | 1,155,850 | 0% | 7.6% | $22,238,554 |
| VANGUARD GROUP INC | 3.6% | 311,889 | +6.8% | 0% | $6,000,745 |
| MARSHALL WACE, LLP | 1.4% | 125,600 | +37% | 0% | $2,416,543 |
| BlackRock, Inc. | 1.2% | 102,060 | +0.7% | 0% | $1,963,635 |
| Vontobel Holding Ltd. | 1.1% | 98,511 | +23% | 0.01% | $1,895,352 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.98% | 84,982 | -7.2% | 0% | $1,635,753 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.36% | 31,403 | -10% | 0% | $604,194 |
| CITADEL ADVISORS LLC | 0.36% | 30,885 | 0% | $594,227 | |
| STATE STREET CORP | 0.34% | 29,731 | +11% | 0% | $572,024 |
| Schonfeld Strategic Advisors LLC | 0.33% | 28,942 | 0% | $556,843 | |
| Lion Point Capital, LP | 0.31% | 27,138 | +59% | 3% | $522,135 |
| J. Goldman & Co LP | 0.31% | 27,000 | 0.02% | $519,480 | |
| MORGAN STANLEY | 0.21% | 18,334 | +134% | 0% | $352,746 |
| UBS Group AG | 0.15% | 12,682 | +68% | 0% | $244,002 |
| NORTHERN TRUST CORP | 0.14% | 12,101 | -20% | 0% | $232,824 |
| Invesco Ltd. | 0.12% | 10,442 | 0% | $200,904 | |
| BANK OF AMERICA CORP /DE/ | 0.06% | 5,343 | +2773% | 0% | $102,799 |
| SBI Securities Co., Ltd. | 0.04% | 3,482 | 0% | 0% | $66,994 |
| SIMPLEX TRADING, LLC | 0.03% | 2,807 | 0% | $54,000 | |
| CITIGROUP INC | 0.03% | 2,621 | +29022% | 0% | $50,428 |
| FMR LLC | 0.02% | 1,882 | -99% | 0% | $36,209 |
| BARCLAYS PLC | 0.02% | 1,408 | 0% | $27,090 | |
| ROYAL BANK OF CANADA | 0% | 287 | -96% | 0% | $6,000 |
| BNP PARIBAS FINANCIAL MARKETS | 0% | 212 | 0% | 0% | $4,079 |
| Physician Wealth Advisors, Inc. | 0% | 142 | 0% | 0% | $2,733 |