In the last 12 months, insiders at SYNLOGIC, INC. ($SYBX) filed 66 transactions with the SEC: 0 open-market purchases totaling $0 and 9 sales totaling $20,480. Net insider sentiment: net selling.
SYNLOGIC, INC. operates in the Pharmaceutical preparations industry (Life sciences sector).
Most Active Insiders
- Brennan Aoife (See Remarks) — 1 transaction totaling $10,964
- Awad Antoine (Chief Operating Officer) — 18 transactions totaling $4,351
- Dooley Mary Beth (See Remarks below) — 3 transactions totaling $3,259
- JENSEN MICHAEL VANGSTED (Chief Financial Officer) — 7 transactions totaling $1,470
- Dooley Mary Beth (Head of Finance) — 2 transactions totaling $436
View all SEC Filings for SYNLOGIC, INC. (SYBX).
Set Up your own filters →Recent Insider Transactions
| Transaction Date | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|
| Oct. 29, 2025 | Dooley Mary Beth | See Remarks below | S | Common Stock | 157 | $1.81 | 12,744.0000 | 12,319,212 | 1.22% | 0.00% |
| April 26, 2025 | Flynn James P | Not found | A | Common Stock | 15000 | $0.00 | 15,000.0000 | 12,196,209 | 9999.99% | 0.12% |
| April 26, 2025 | Shea Richard P | Not found | A | Common Stock | 15000 | $0.00 | 15,506.0000 | 12,196,209 | 2964.43% | 0.12% |
| April 2, 2025 | Dooley Mary Beth | See Remarks below | S | Common Stock | 144 | $1.20 | 12,901.0000 | 12,196,209 | 1.10% | 0.00% |
| Feb. 3, 2025 | Dooley Mary Beth | See Remarks below | S | Common Stock | 2107 | $1.33 | 13,045.0000 | 12,196,209 | 13.91% | 0.02% |
| Oct. 29, 2024 | Dooley Mary Beth | Head of Finance | S | Common Stock | 79 | $1.40 | 15,152.0000 | 12,223,922 | 0.52% | 0.00% |
| April 2, 2024 | Awad Antoine | Chief Operating Officer | S | Common Stock | 372 | $1.73 | 33,859.0000 | 6,502,279 | 1.09% | 0.01% |
| April 2, 2024 | Dooley Mary Beth | Head of Finance | S | Common Stock | 188 | $1.73 | 15,231.0000 | 6,502,279 | 1.22% | 0.00% |
| March 19, 2024 | Flynn James P | Not found | A | Stock Option (right to buy) | 4000 | $0.00 | 4,000.0000 | 6,502,279 | 9999.99% | 0.06% |
| Jan. 2, 2024 | Hurter Patricia N. | Not found | A | Stock Option (right to buy) | 14678 | $0.00 | 14,678.0000 | 6,502,279 | 9999.99% | 0.23% |
| Jan. 2, 2024 | Barrett Peter | Not found | A | Stock Option (right to buy) | 24923 | $0.00 | 24,923.0000 | 6,502,279 | 9999.99% | 0.38% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | A | Stock Option (right to buy) | 5591 | $0.00 | 5,591.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | A | Stock Option (right to buy) | 3733 | $0.00 | 3,733.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | A | Stock Option (right to buy) | 3600 | $0.00 | 3,600.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | A | Stock Option (right to buy) | 9999 | $0.00 | 9,999.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | A | Stock Option (right to buy) | 12332 | $0.00 | 12,332.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | A | Stock Option (right to buy) | 12352 | $0.00 | 12,352.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | A | Stock Option (right to buy) | 18999 | $0.00 | 18,999.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | A | Stock Option (right to buy) | 28943 | $0.00 | 28,943.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | A | Stock Option (right to buy) | 42999 | $0.00 | 42,999.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | A | Stock Option (right to buy) | 8666 | $0.00 | 8,666.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | JENSEN MICHAEL VANGSTED | Chief Financial Officer | D | Stock Option (right to buy) | 15332 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | JENSEN MICHAEL VANGSTED | Chief Financial Officer | D | Stock Option (right to buy) | 13332 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | JENSEN MICHAEL VANGSTED | Chief Financial Officer | D | Stock Option (right to buy) | 6666 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | JENSEN MICHAEL VANGSTED | Chief Financial Officer | A | Stock Option (right to buy) | 15332 | $0.00 | 15,332.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | JENSEN MICHAEL VANGSTED | Chief Financial Officer | A | Stock Option (right to buy) | 13332 | $0.00 | 13,332.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | JENSEN MICHAEL VANGSTED | Chief Financial Officer | A | Stock Option (right to buy) | 6666 | $0.00 | 6,666.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | D | Stock Option (right to buy) | 3666 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | D | Stock Option (right to buy) | 666 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | D | Stock Option (right to buy) | 6666 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | D | Stock Option (right to buy) | 4666 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | D | Stock Option (right to buy) | 4666 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | D | Stock Option (right to buy) | 11031 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | D | Stock Option (right to buy) | 16666 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | A | Stock Option (right to buy) | 3666 | $0.00 | 3,666.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | A | Stock Option (right to buy) | 666 | $0.00 | 666.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | A | Stock Option (right to buy) | 6666 | $0.00 | 6,666.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | A | Stock Option (right to buy) | 4666 | $0.00 | 4,666.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | A | Stock Option (right to buy) | 4666 | $0.00 | 4,666.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | A | Stock Option (right to buy) | 4666 | $0.00 | 4,666.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | A | Stock Option (right to buy) | 11031 | $0.00 | 11,031.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | A | Stock Option (right to buy) | 16666 | $0.00 | 16,666.0000 | 0 | 9999.99% | 0.00% |
| Nov. 10, 2023 | Awad Antoine | Chief Operating Officer | D | Stock Option (right to buy) | 4666 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | D | Stock Option (right to buy) | 5591 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | D | Stock Option (right to buy) | 3733 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | D | Stock Option (right to buy) | 3600 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | D | Stock Option (right to buy) | 9999 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | D | Stock Option (right to buy) | 12332 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | D | Stock Option (right to buy) | 12352 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | D | Stock Option (right to buy) | 18999 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | D | Stock Option (right to buy) | 28943 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | D | Stock Option (right to buy) | 42999 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Nov. 10, 2023 | Brennan Aoife | President and CEO | D | Stock Option (right to buy) | 8666 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| June 22, 2023 | Mathers Edward T | Director | A | Stock Option (right to buy) | 30000 | $0.00 | 30,000.0000 | 0 | 9999.99% | 0.00% |
| June 22, 2023 | Shea Richard P | Not found | A | Stock Option (right to buy) | 30000 | $0.00 | 30,000.0000 | 0 | 9999.99% | 0.00% |
| June 22, 2023 | Leschly Nick | Not found | A | Stock Option (right to buy) | 30000 | $0.00 | 30,000.0000 | 0 | 9999.99% | 0.00% |
| June 22, 2023 | Burgess Michael F. | Not found | A | Stock Option (right to buy) | 30000 | $0.00 | 30,000.0000 | 0 | 9999.99% | 0.00% |
| June 22, 2023 | Kelly-Croswell Lisa | Not found | A | Stock Option (right to buy) | 30000 | $0.00 | 30,000.0000 | 0 | 9999.99% | 0.00% |
| June 22, 2023 | Heffernan Michael Thomas | Not found | A | Stock Option (right to buy) | 30000 | $0.00 | 30,000.0000 | 0 | 9999.99% | 0.00% |
| June 22, 2023 | Hurter Patricia N. | Not found | A | Stock Option (right to buy) | 30000 | $0.00 | 30,000.0000 | 0 | 9999.99% | 0.00% |
| June 22, 2023 | Barrett Peter | Not found | A | Stock Option (right to buy) | 30000 | $0.00 | 30,000.0000 | 0 | 9999.99% | 0.00% |
| April 3, 2023 | Brennan Aoife | See Remarks | S | Common Stock | 19042 | $0.58 | 256,301.0000 | 0 | 6.92% | 0.00% |
| April 3, 2023 | Awad Antoine | Chief Operating Officer | S | Common Stock | 6438 | $0.58 | 74,732.0000 | 0 | 7.93% | 0.00% |
| April 3, 2023 | JENSEN MICHAEL VANGSTED | Chief Financial Officer | S | Common Stock | 2553 | $0.58 | 46,947.0000 | 0 | 5.16% | 0.00% |
| Jan. 3, 2023 | Barrett Peter | Director | A | Stock Option (right to buy) | 156130 | $0.00 | 156,130.0000 | 0 | 9999.99% | 0.00% |
| Jan. 3, 2023 | Hurter Patricia N. | Director | A | Stock Option (right to buy) | 91954 | $0.00 | 91,954.0000 | 0 | 9999.99% | 0.00% |