MCRB · Seres Therapeutics Inc. Common Stock
View on chartInsiders & Stakes
| Nutritional Health LTP Fund General Partner LLC 10% Owner | ▲ Buy | Open Market | 5,825,495 Shares held | 7/5/2022 | View profile |
| David Arkowitz Director | ▼ Sell | Open Market | 182,442 Shares held | 2/16/2024 | View profile |
| Ege David S. See Remarks | ▼ Sell | Open Market | 77,575 Shares held | 8/16/2024 | View profile |
| Kender Richard N Director | ▲ Buy | Grant | 63,492 Shares held | 7/5/2022 | View profile |
| Biondi Paul Director | ▲ Buy | Grant | 47,619 Shares held | 7/5/2022 | View profile |
| Cloghessy Paula See Remarks | ▼ Sell | Open Market | 45,684 Shares held | 10/30/2023 | View profile |
| von Moltke Lisa Director | ▼ Sell | Open Market | 39,875 Shares held | 2/18/2025 | View profile |
| Willard H. Dere Director | ▲ Buy | Grant | 31,746 Shares held | 7/5/2022 | View profile |
| Zausner Meryl Director | ▲ Buy | Grant | 31,746 Shares held | 7/5/2022 | View profile |
| Shaff Eric D. CEO and President | ▼ Sell | Open Market | 12,499 Shares held | 8/17/2026 | View profile |
| Brady Kelly See Remarks | ▼ Sell | Open Market | 8,679 Shares held | 8/17/2026 | View profile |
| Young Teresa L. See Remarks | ▼ Sell | Open Market | 8,557 Shares held | 2/15/2026 | View profile |
| DesRosier Thomas Chief Legal Officer and EVP | ▼ Sell | Open Market | 8,117 Shares held | 8/17/2026 | View profile |
| Henn Matthew R. See Remarks | ▼ Sell | Open Market | 7,995 Shares held | 8/17/2026 | View profile |
Transaction History
| Brady Kelly | ▼ Sell | Open Market | 64 | $291 | 8/17/2026 |
| Shaff Eric D. | ▼ Sell | Open Market | 263 | $1K | 8/17/2026 |
| DesRosier Thomas | ▼ Sell | Open Market | 82 | $373 | 8/17/2026 |
| Henn Matthew R. | ▼ Sell | Open Market | 81 | $369 | 8/17/2026 |
| Brady Kelly | ▲ Buy | Option Exercise | 181 | — | 8/15/2026 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 722 | — | 8/15/2026 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 245 | — | 8/15/2026 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 238 | — | 8/15/2026 |
| Shaff Eric D. | ▼ Sell | Open Market | 259 | $2K | 5/18/2026 |
| DesRosier Thomas | ▼ Sell | Open Market | 79 | $595 | 5/18/2026 |
| Brady Kelly | ▼ Sell | Open Market | 59 | $444 | 5/18/2026 |
| Henn Matthew R. | ▼ Sell | Open Market | 77 | $580 | 5/18/2026 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 722 | — | 5/15/2026 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 244 | — | 5/15/2026 |
| Brady Kelly | ▲ Buy | Option Exercise | 180 | — | 5/15/2026 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 238 | — | 5/15/2026 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 723 | — | 2/15/2026 |
| Shaff Eric D. | ▼ Sell | Open Market | 259 | $2K | 2/15/2026 |
| Young Teresa L. | ▲ Buy | Option Exercise | 231 | — | 2/15/2026 |
| Young Teresa L. | ▼ Sell | Open Market | 75 | $635 | 2/15/2026 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 244 | — | 2/15/2026 |
| DesRosier Thomas | ▼ Sell | Open Market | 78 | $661 | 2/15/2026 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 239 | — | 2/15/2026 |
| Henn Matthew R. | ▼ Sell | Open Market | 89 | $754 | 2/15/2026 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 112 | — | 11/15/2025 |
| Henn Matthew R. | ▼ Sell | Open Market | 1,257 | $22K | 11/15/2025 |
| Shaff Eric D. | ▼ Sell | Open Market | 217 | $4K | 11/15/2025 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 331 | — | 11/15/2025 |
| Young Teresa L. | ▲ Buy | Option Exercise | 132 | — | 11/15/2025 |
| Young Teresa L. | ▲ Buy | Option Exercise | 98 | — | 11/15/2025 |
| Young Teresa L. | ▼ Sell | Open Market | 1,042 | $18K | 11/15/2025 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 140 | — | 11/15/2025 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 132 | — | 11/15/2025 |
| DesRosier Thomas | ▼ Sell | Open Market | 76 | $1K | 11/15/2025 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 3,998 | — | 11/15/2025 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 98 | — | 11/15/2025 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 390 | — | 11/15/2025 |
| Young Teresa L. | ▲ Buy | Option Exercise | 3,998 | — | 11/15/2025 |
| Shaff Eric D. | ▼ Sell | Open Market | 217 | $4K | 8/18/2025 |
| DesRosier Thomas | ▼ Sell | Open Market | 76 | $1K | 8/18/2025 |
| Henn Matthew R. | ▼ Sell | Open Market | 73 | $1K | 8/18/2025 |
| Young Teresa L. | ▼ Sell | Open Market | 59 | $982 | 8/18/2025 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 391 | — | 8/15/2025 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 133 | — | 8/15/2025 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 111 | — | 8/15/2025 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 141 | — | 8/15/2025 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 97 | — | 8/15/2025 |
| Young Teresa L. | ▲ Buy | Option Exercise | 97 | — | 8/15/2025 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 333 | — | 8/15/2025 |
| Young Teresa L. | ▲ Buy | Option Exercise | 133 | — | 8/15/2025 |
| Henn Matthew R. | ▼ Sell | Open Market | 77 | $561 | 5/16/2025 |
| Young Teresa L. | ▼ Sell | Open Market | 63 | $459 | 5/16/2025 |
| Shaff Eric D. | ▼ Sell | Open Market | 220 | $2K | 5/16/2025 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 98 | — | 5/15/2025 |
| Young Teresa L. | ▲ Buy | Option Exercise | 133 | — | 5/15/2025 |
| Young Teresa L. | ▲ Buy | Option Exercise | 98 | — | 5/15/2025 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 390 | — | 5/15/2025 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 133 | — | 5/15/2025 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 111 | — | 5/15/2025 |
| DesRosier Thomas | ▼ Sell | Open Market | 79 | $575 | 5/15/2025 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 140 | — | 5/15/2025 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 331 | — | 5/15/2025 |
| Shaff Eric D. | ▼ Sell | Open Market | 12,726 | $10K | 2/18/2025 |
| Henn Matthew R. | ▼ Sell | Open Market | 3,953 | $3K | 2/18/2025 |
| DesRosier Thomas | ▼ Sell | Open Market | 4,300 | $3K | 2/18/2025 |
| von Moltke Lisa | ▼ Sell | Open Market | 4,416 | $4K | 2/18/2025 |
| Young Teresa L. | ▼ Sell | Open Market | 3,338 | $3K | 2/18/2025 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 26,563 | — | 2/15/2025 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 2,657 | — | 2/15/2025 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 7,813 | — | 2/15/2025 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 8,907 | — | 2/15/2025 |
| von Moltke Lisa | ▲ Buy | Option Exercise | 2,969 | — | 2/15/2025 |
| von Moltke Lisa | ▲ Buy | Option Exercise | 8,907 | — | 2/15/2025 |
| Young Teresa L. | ▲ Buy | Option Exercise | 2,657 | — | 2/15/2025 |
| Young Teresa L. | ▲ Buy | Option Exercise | 7,813 | — | 2/15/2025 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 2,813 | — | 2/15/2025 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 7,813 | — | 2/15/2025 |
| von Moltke Lisa | ▼ Sell | Open Market | 977 | $528 | 11/18/2024 |
| Young Teresa L. | ▼ Sell | Open Market | 735 | $398 | 11/18/2024 |
| DesRosier Thomas | ▼ Sell | Open Market | 878 | $475 | 11/18/2024 |
| Shaff Eric D. | ▼ Sell | Open Market | 2,505 | $1K | 11/18/2024 |
| Henn Matthew R. | ▼ Sell | Open Market | 927 | $501 | 11/18/2024 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 2,656 | — | 11/15/2024 |
| von Moltke Lisa | ▲ Buy | Option Exercise | 2,969 | — | 11/15/2024 |
| Young Teresa L. | ▲ Buy | Option Exercise | 2,656 | — | 11/15/2024 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 7,812 | — | 11/15/2024 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 2,812 | — | 11/15/2024 |
| DesRosier Thomas | ▼ Sell | Open Market | 4,259 | $3K | 10/28/2024 |
| Shaff Eric D. | ▼ Sell | Open Market | 8,748 | $6K | 10/28/2024 |
| von Moltke Lisa | ▼ Sell | Open Market | 4,334 | $3K | 10/28/2024 |
| Henn Matthew R. | ▼ Sell | Open Market | 3,984 | $3K | 10/28/2024 |
| Young Teresa L. | ▼ Sell | Open Market | 2,983 | $2K | 10/28/2024 |
| Young Teresa L. | ▲ Buy | Option Exercise | 11,360 | $0 | 10/27/2024 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 12,622 | $0 | 10/27/2024 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 13,500 | $0 | 10/27/2024 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 27,837 | $0 | 10/27/2024 |
| von Moltke Lisa | ▲ Buy | Option Exercise | 13,744 | $0 | 10/27/2024 |
| von Moltke Lisa | ▼ Sell | Open Market | 973 | $817 | 8/16/2024 |
| DesRosier Thomas | ▼ Sell | Open Market | 873 | $733 | 8/16/2024 |
| Henn Matthew R. | ▼ Sell | Open Market | 923 | $775 | 8/16/2024 |
| Shaff Eric D. | ▼ Sell | Open Market | 2,518 | $2K | 8/16/2024 |
| Young Teresa L. | ▼ Sell | Open Market | 728 | $612 | 8/16/2024 |
| Ege David S. | ▼ Sell | Open Market | 1,128 | $948 | 8/16/2024 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 2,813 | — | 8/15/2024 |
| von Moltke Lisa | ▲ Buy | Option Exercise | 2,969 | — | 8/15/2024 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 2,656 | — | 8/15/2024 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 7,813 | — | 8/15/2024 |
| Young Teresa L. | ▲ Buy | Option Exercise | 2,656 | — | 8/15/2024 |
| Ege David S. | ▲ Buy | Option Exercise | 2,969 | — | 8/15/2024 |
| Young Teresa L. | ▼ Sell | Open Market | 24,480 | $27K | 8/5/2024 |
| Young Teresa L. | ▲ Buy | Option Exercise | 85,000 | — | 8/3/2024 |
| von Moltke Lisa | ▲ Buy | Option Exercise | 2,968 | — | 5/15/2024 |
| von Moltke Lisa | ▼ Sell | Open Market | 939 | $883 | 5/15/2024 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 7,812 | — | 5/15/2024 |
| Shaff Eric D. | ▼ Sell | Open Market | 2,435 | $2K | 5/15/2024 |
| Young Teresa L. | ▲ Buy | Option Exercise | 2,656 | — | 5/15/2024 |
| Young Teresa L. | ▼ Sell | Open Market | 703 | $661 | 5/15/2024 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 2,812 | — | 5/15/2024 |
| Henn Matthew R. | ▼ Sell | Open Market | 891 | $838 | 5/15/2024 |
| Ege David S. | ▲ Buy | Option Exercise | 2,968 | — | 5/15/2024 |
| Ege David S. | ▼ Sell | Open Market | 1,090 | $1K | 5/15/2024 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 2,656 | — | 5/15/2024 |
| DesRosier Thomas | ▼ Sell | Open Market | 843 | $792 | 5/15/2024 |
| Shaff Eric D. | ▼ Sell | Open Market | 11,549 | $12K | 2/16/2024 |
| Young Teresa L. | ▼ Sell | Open Market | 3,374 | $4K | 2/16/2024 |
| Ege David S. | ▼ Sell | Open Market | 5,010 | $5K | 2/16/2024 |
| David Arkowitz | ▼ Sell | Open Market | 3,939 | $4K | 2/16/2024 |
| Henn Matthew R. | ▼ Sell | Open Market | 4,170 | $5K | 2/16/2024 |
| von Moltke Lisa | ▼ Sell | Open Market | 4,400 | $5K | 2/16/2024 |
| DesRosier Thomas | ▼ Sell | Open Market | 3,939 | $4K | 2/16/2024 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 11,250 | — | 2/15/2024 |
| Young Teresa L. | ▲ Buy | Option Exercise | 10,625 | — | 2/15/2024 |
| von Moltke Lisa | ▲ Buy | Option Exercise | 11,875 | — | 2/15/2024 |
| Ege David S. | ▲ Buy | Option Exercise | 11,875 | — | 2/15/2024 |
| David Arkowitz | ▲ Buy | Option Exercise | 10,625 | — | 2/15/2024 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 10,625 | — | 2/15/2024 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 31,250 | — | 2/15/2024 |
| Shaff Eric D. | ▼ Sell | Open Market | 8,552 | $12K | 10/30/2023 |
| David Arkowitz | ▼ Sell | Open Market | 4,066 | $5K | 10/30/2023 |
| Ege David S. | ▼ Sell | Open Market | 4,066 | $5K | 10/30/2023 |
| DesRosier Thomas | ▼ Sell | Open Market | 4,156 | $6K | 10/30/2023 |
| Young Teresa L. | ▼ Sell | Open Market | 2,907 | $4K | 10/30/2023 |
| Cloghessy Paula | ▼ Sell | Open Market | 2,904 | $4K | 10/30/2023 |
| Henn Matthew R. | ▼ Sell | Open Market | 3,886 | $5K | 10/30/2023 |
| von Moltke Lisa | ▼ Sell | Open Market | 4,232 | $6K | 10/30/2023 |
| Young Teresa L. | ▲ Buy | Option Exercise | 11,361 | $0 | 10/27/2023 |
| David Arkowitz | ▲ Buy | Option Exercise | 13,209 | $0 | 10/27/2023 |
| Ege David S. | ▲ Buy | Option Exercise | 11,361 | $0 | 10/27/2023 |
| Henn Matthew R. | ▲ Buy | Option Exercise | 12,623 | $0 | 10/27/2023 |
| Cloghessy Paula | ▲ Buy | Option Exercise | 9,418 | $0 | 10/27/2023 |
| Shaff Eric D. | ▲ Buy | Option Exercise | 27,838 | $0 | 10/27/2023 |
| von Moltke Lisa | ▲ Buy | Option Exercise | 13,745 | $0 | 10/27/2023 |
| DesRosier Thomas | ▲ Buy | Option Exercise | 13,501 | $0 | 10/27/2023 |
| Ege David S. | ▼ Sell | Open Market | 7,038 | $37K | 4/28/2023 |
| David Arkowitz | ▲ Buy | Grant | 42,500 | $0 | 4/27/2023 |
| Ege David S. | ▲ Buy | Grant | 20,000 | $0 | 4/27/2023 |
| Ege David S. | ▼ Sell | Open Market | 5,012 | $40K | 10/31/2022 |
| David Arkowitz | ▲ Buy | Grant | 42,500 | $0 | 10/27/2022 |
| Ege David S. | ▲ Buy | Grant | 20,000 | $0 | 10/27/2022 |
| Nutritional Health LTP Fund General Partner LLC | ▲ Buy | Open Market | 2,912,748 | $9.2M | 7/5/2022 |
| Nutritional Health LTP Fund General Partner LLC | ▲ Buy | Open Market | 5,825,495 | $18.4M | 7/5/2022 |
| Cloghessy Paula | ▲ Buy | Grant | 31,746 | $100K | 7/5/2022 |
| Henn Matthew R. | ▲ Buy | Grant | 47,619 | $150K | 7/5/2022 |
| Shaff Eric D. | ▲ Buy | Grant | 63,492 | $200K | 7/5/2022 |
| Biondi Paul | ▲ Buy | Grant | 47,619 | $150K | 7/5/2022 |
| DesRosier Thomas | ▲ Buy | Grant | 63,492 | $200K | 7/5/2022 |
| Zausner Meryl | ▲ Buy | Grant | 31,746 | $100K | 7/5/2022 |
| David Arkowitz | ▲ Buy | Grant | 63,492 | $200K | 7/5/2022 |
| Willard H. Dere | ▲ Buy | Grant | 31,746 | $100K | 7/5/2022 |
| Kender Richard N | ▲ Buy | Grant | 63,492 | $200K | 7/5/2022 |
| Ege David S. | ▲ Buy | Grant | 31,746 | $100K | 7/5/2022 |
| David Arkowitz | ▲ Buy | Option Exercise | 5,000 | $0 | 6/15/2022 |
AI Market Commentary
AI-generatedAll commentary →Synthesized from recent news and fundamentals/technical data -- not human analyst commentary or trader sentiment.
October 15, 2026
MCRB to Present Preclinical Data on SER-428 at IDWeek 2026
Seres Therapeutics announced it will present preclinical data for SER-428, an investigational live biotherapeutic intended to reduce the risk of bloodstream infections in critically ill patients, at the upcoming IDWeek 2026 conference. The data will focus on early-stage results that support the development of the oral liquid LBP. The stock is currently trading near its $7.60 support level with an RSI of 22.8, indicating limited recent price momentum.
MCRB to Present Preclinical Data on SER-428 at IDWeek 2026. Seres Therapeutics announced it will present preclinical data for SER-428, an investigational live biotherapeutic intended to reduce the risk of bloodstream infections in critically ill patients, at the upcoming IDWeek 2026 conference. The data will focus on early-stage results that support the development of the oral liquid LBP. The stock is currently trading near its $7.60 support level with an RSI of 22.8, indicating limited recent price momentum.