List of insiders holdings for SYNLOGIC INC.:
- Shares directly owned by the insider.
- Shares indirectly owned by the insider.
- Total shares owned by the insider (sum of shares directly and indirectly owned).
- Total market value if available.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| # | Insider Holder Name | Report Date Time | Shares Owned Directly Indirectly | Total Shares Owned | Filing |
| 1 | Ginkgo Bioworks Inc. 10% Owner | 2019-06-21 17:04:31 | 8,888,888 0 | 8,888,888 | Form 3 |
| 2 | MOTT DAVID M 10% Owner | 2018-01-26 16:34:22 | 0 4,228,940 | 4,228,940 | Form 4 |
| 3 | BARRIS PETER J 10% Owner | 2018-01-26 16:32:22 | 0 4,228,940 | 4,228,940 | Form 4 |
| 4 | BARRETT M JAMES 10% Owner | 2018-01-26 16:31:52 | 0 4,228,940 | 4,228,940 | Form 4 |
| 5 | Sonsini Peter W. 10% Owner | 2018-01-26 16:35:21 | 0 4,228,940 | 4,228,940 | Form 4 |
| 6 | Viswanathan Ravi 10% Owner | 2018-01-26 16:35:54 | 0 4,228,940 | 4,228,940 | Form 4 |
| 7 | Khuong Chau Quang Director | 2021-04-22 17:11:02 | 0 3,696,662 | 3,696,662 | Form 4 |
| 8 | Funicular Funds LP Cable Car Capital LLC Ma-Weaver Jacob 10% Owner | 2026-07-29 16:18:41 | 3,312,219 0 | 3,312,219 | Form 13D |
| 9 | KOLLURI KRISHNA KITTU 10% Owner | 2015-10-06 15:14:27 | 0 3,260,683 | 3,260,683 | Form 4 |
| 10 | Weller Harry R 10% Owner | 2015-10-06 15:18:15 | 0 3,260,683 | 3,260,683 | Form 4 |
| 11 | New Enterprise Associates 14 L.P. NEA Partners 14 L.P. NEA 14 GP LTD BASKETT FOREST Florence Anthony A. Jr. KERINS PATRICK J SANDELL SCOTT D 10% Owner | 2026-07-29 19:40:11 | 2,922,772 0 | 2,922,772 | Form 13D |
| 12 | Atlas Venture Fund IX L.P. 10% Owner | 2017-08-30 16:05:51 | 2,651,963 0 | 2,651,963 | Form 3 |
| 13 | New Enterprise Associates 14 L.P. NEA Partners 14 L.P. NEA 14 GP LTD Florence Anthony A. Jr. SANDELL SCOTT D Makhzoumi Mohamad Director 10% Owner | 2026-08-14 16:09:06 | 2,640,845 0 | 2,640,845 | Form 4 |
| 14 | Cancer Prevention & Research Institute of Texas 10% Owner | 2015-10-08 12:16:29 | 2,395,010 0 | 2,395,010 | Form 13G |
| 15 | Sofinnova Venture Partners VIII L.P. Sofinnova Management VIII L.L.C. HEALY JAMES AKKARAJU SRINIVAS Mehra Anand 10% Owner | 2018-02-14 13:03:27 | 574,972 0 | 574,972 | Form 13D |
| 16 | ORBIMED ADVISORS LLC OrbiMed Capital GP VI LLC Director | 2023-10-04 16:27:01 | 401,998 0 | 401,998 | Form 13D |
| 17 | ORBIMED ADVISORS LLC ISALY SAMUEL D OrbiMed Capital GP VI LLC Director | 2023-10-04 16:27:01 | 401,998 0 | 401,998 | Form 13D |
| 18 | PFIZER INC 10% Owner | 2018-02-13 17:04:00 | 356,797 0 | 356,797 | Form 13G |
| 19 | Barbosa Miguel Chief Scientific Officer | 2015-09-30 19:20:54 | 284,206 0 | 284,206 | Form 4 |
| 20 | O'Neill Vincent Chief Medical Officer | 2016-04-26 20:19:54 | 250,000 0 | 250,000 | Form 4 |
| 21 | Lammers Paul President & CEO | 2016-03-14 17:22:27 | 165,000 0 | 165,000 | Form 4 |
| 22 | Brennan Aoife President and CEO | 2023-11-14 19:23:02 | 147,214 0 | 147,214 | Form 4 |
| 23 | Gutierrez-Ramos Jose-Carlos See Remarks | 2018-03-16 06:05:35 | 120,540 0 | 120,540 | Form 4 |
| 24 | Riese Richard J. Chief Medical Officer | 2021-03-12 16:53:02 | 109,000 0 | 109,000 | Form 4 |
| 25 | Fuhrman Alan Chief Financial Officer | 2016-03-14 17:23:01 | 60,000 0 | 60,000 | Form 4 |
| 26 | DeYoung Casi Chief Business Officer | 2016-03-14 17:23:32 | 60,000 0 | 60,000 | Form 4 |
| 27 | Shegog Todd See Remarks | 2019-03-06 16:05:23 | 58,500 0 | 58,500 | Form 4 |
| 28 | BELOFF GREGG See Remarks | 2022-02-01 16:05:31 | 50,000 0 | 50,000 | Form 4 |
| 29 | Miller Paul Francis Chief Scientific Officer | 2019-02-14 16:06:58 | 48,135 0 | 48,135 | Form 4 |
| 30 | JENSEN MICHAEL VANGSTED Chief Financial Officer | 2023-11-14 19:22:53 | 35,330 0 | 35,330 | Form 4 |
| 31 | Awad Antoine Chief Operating Officer | 2024-04-04 16:00:05 | 33,859 0 | 33,859 | Form 4 |
| 32 | Mathers Edward T Director | 2023-06-26 15:46:34 | 30,000 0 | 30,000 | Form 4 |
| 33 | Leschly Nick Director | 2023-06-26 14:25:56 | 30,000 0 | 30,000 | Form 4 |
| 34 | Burgess Michael F. Director | 2023-06-26 14:21:50 | 30,000 0 | 30,000 | Form 4 |
| 35 | Kelly-Croswell Lisa Director | 2023-06-26 14:21:16 | 30,000 0 | 30,000 | Form 4 |
| 36 | Heffernan Michael Thomas Director | 2023-06-26 14:20:38 | 30,000 0 | 30,000 | Form 4 |
| 37 | Barrett Peter Director | 2024-01-04 16:00:20 | 24,923 0 | 24,923 | Form 4 |
| 38 | Kim Sinil Chief Medical Officer | 2016-03-07 18:50:25 | 23,628 0 | 23,628 | Form 3/A |
| 39 | Nisen Perry Director | 2016-09-06 18:23:56 | 20,000 0 | 20,000 | Form 4 |
| 40 | Shea Richard P Director | 2025-04-29 16:46:11 | 15,506 0 | 15,506 | Form 4 |
| 41 | Flynn James P Director | 2025-04-29 16:43:44 | 15,000 0 | 15,000 | Form 4 |
| 42 | Hurter Patricia N. Director | 2024-01-04 16:00:30 | 14,678 0 | 14,678 | Form 4 |
| 43 | Dooley Mary Beth See Remarks below | 2025-10-31 15:30:03 | 12,744 0 | 12,744 | Form 4 |
| 44 | SIEGALL CLAY B Director | 2016-09-06 18:33:12 | 10,000 0 | 10,000 | Form 4 |
| 45 | Winkler Matthew Director | 2016-09-06 18:25:41 | 10,000 0 | 10,000 | Form 4 |
| 46 | Greenleaf Peter Director | 2016-09-06 18:27:08 | 10,000 0 | 10,000 | Form 4 |
| 47 | POWELL MICHAEL Director | 2019-06-07 16:15:22 | 10,000 0 | 10,000 | Form 4 |
| 48 | Alleva Lawrence M Director | 2016-09-06 18:28:40 | 10,000 0 | 10,000 | Form 4 |
| 49 | Gengos Andrew Chief Operating Officer | 2018-03-15 16:05:27 | 10,000 0 | 10,000 | Form 4 |
| 50 | PLEVY SCOTT ERIC Chief Scientific Officer | 2019-09-25 16:31:04 | 8,000 0 | 8,000 | Form 4 |
| 51 | Irvin Jon Vice President, Finance | 2016-12-02 19:11:27 | 7,625 0 | 7,625 | Form 4 |
| 52 | Jones Elaine V Director | 2015-09-30 19:23:36 | 7,200 0 | 7,200 | Form 4 |