MCRB
Seres Therapeutics, Inc.
NASDAQ · Healthcare · Biotechnology · US
$5.72
+1.42%0
Insider buys (3m)
4
Insider sells (3m)
-$2.2K
Net value (3m)
-14.1%
Price return (3m)
Form 4 filings
| Date | Insider | Activity | Shares | Price |
|---|---|---|---|---|
| Aug 18, 2026 | Henn Matthew R · officer: See Remarks | Sale | 81 | $4.55 |
| Aug 18, 2026 | DesRosier Thomas · officer: See Remarks | Sale | 82 | $4.55 |
| Aug 18, 2026 | Shaff Eric D. · director | M-Exempt | 332 | $0.00 |
| Aug 18, 2026 | Brady Kelly · officer: See Remarks | M-Exempt | 90 | $0.00 |
| Aug 18, 2026 | Henn Matthew R · officer: See Remarks | M-Exempt | 238 | $0.00 |
| Aug 18, 2026 | DesRosier Thomas · officer: See Remarks | M-Exempt | 112 | $0.00 |
| Aug 18, 2026 | Shaff Eric D. · director | Sale | 263 | $4.55 |
| Aug 18, 2026 | Brady Kelly · officer: See Remarks | M-Exempt | 91 | $0.00 |
| Aug 18, 2026 | Brady Kelly · officer: See Remarks | Sale | 64 | $4.55 |
| Aug 18, 2026 | Henn Matthew R · officer: See Remarks | M-Exempt | 98 | $0.00 |
| Aug 18, 2026 | DesRosier Thomas · officer: See Remarks | M-Exempt | 133 | $0.00 |
| Aug 18, 2026 | Brady Kelly · officer: See Remarks | M-Exempt | 181 | $0.00 |
| Aug 18, 2026 | Shaff Eric D. · director | M-Exempt | 722 | $0.00 |
| Aug 18, 2026 | Henn Matthew R · officer: See Remarks | M-Exempt | 140 | $0.00 |
| Aug 18, 2026 | Shaff Eric D. · director | M-Exempt | 390 | $0.00 |
| Aug 18, 2026 | DesRosier Thomas · officer: See Remarks | M-Exempt | 245 | $0.00 |
| Jul 10, 2026 | Henn Matthew R · officer: See Remarks | A-Award | 25,000 | $9.13 |
| Jul 10, 2026 | Kender Richard N · director, officer: See Remarks | A-Award | 50,000 | $9.13 |
| Jul 10, 2026 | Brady Kelly · officer: See Remarks | A-Award | 18,750 | $9.13 |
| Jul 10, 2026 | Dere Willard H · director | A-Award | 6,500 | $7.14 |
| Jul 10, 2026 | Graves Kurt · director | A-Award | 6,500 | $7.14 |
| Jul 10, 2026 | Rosiello Robert L. · director | A-Award | 6,500 | $7.14 |
| Jul 10, 2026 | Thorell Marella · officer: See Remarks | A-Award | 7,500 | $9.13 |
| Jul 10, 2026 | DesRosier Thomas · officer: See Remarks | A-Award | 7,500 | $9.13 |
| Jul 10, 2026 | Fraser Claire · director | A-Award | 6,500 | $7.14 |
| Jul 10, 2026 | Berenson Stephen · director | A-Award | 6,500 | $7.14 |
| Jul 10, 2026 | Ausiello Dennis A · director | A-Award | 6,500 | $7.14 |
| Jul 10, 2026 | Shaff Eric D. · director | A-Award | 6,500 | $7.14 |
| Jul 2, 2026 | Ausiello Dennis A · director | A-Award | 7,508 | $7.94 |
| Jul 2, 2026 | Rosiello Robert L. · director | A-Award | 7,508 | $7.94 |
Institutional positioning
13F filings over the trailing two quarters
New 6Increased 10Reduced 10Sold out 34
| Filer | Action | Shares | Filed |
|---|---|---|---|
| FLAGSHIP PIONEERING INC. | Unchanged | 1,155,850 | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 294,143 | May 15, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 226,939 | May 15, 2026 |
| MARSHALL WACE, LLP | Increased | 139,539 | May 15, 2026 |
| VONTOBEL HOLDING LTD. | Increased | 138,468 | May 8, 2026 |
| BLACKROCK, INC. | Reduced | 102,026 | May 13, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 74,835 | May 15, 2026 |
| AMERICAN CENTURY COMPANIES INC | Increased | 62,316 | May 15, 2026 |
| CITADEL ADVISORS LLC | Reduced | 59,500 | May 15, 2026 |
| CITADEL ADVISORS LLC | Reduced | 54,004 | Sep 2, 2026 |
| VANGUARD FIDUCIARY TRUST CO | New Position | 39,643 | May 8, 2026 |
| STATE STREET CORP | Unchanged | 33,901 | May 15, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Increased | 31,630 | May 15, 2026 |
| LION POINT CAPITAL, LP | Unchanged | 31,570 | May 15, 2026 |
| MORGAN STANLEY | Reduced | 21,700 | May 15, 2026 |
Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Aug 18, 2026