SYNLOGIC, INC. (SYBX)

Latest Insider Confidence Score

2025Q4

49.3
Bearish

Company insider confidence (by quarter)

2015Q3 2025Q4

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Ginkgo Bioworks, Inc. 6,340,771 Jun 21, 2019
Viswanathan Ravi 10% Owner 4,228,940 Jan 26, 2018
Sonsini Peter W. 10% Owner 4,228,940 Jan 26, 2018
Mott David M 10% Owner 4,228,940 Jan 26, 2018
Barris Peter J 10% Owner 4,228,940 Jan 26, 2018

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Oct 29, 2025 Oct 31, 2025 Dooley Mary Beth Officer Sell 27.5 -157 -1.22% $284.2
Apr 26, 2025 Apr 29, 2025 Shea Richard P Director Neutral 90.0 +15,000 2964.43% -
Apr 26, 2025 Apr 29, 2025 Flynn James P Director Neutral 90.0 +15,000 100.00% -
Apr 2, 2025 Apr 3, 2025 Dooley Mary Beth Officer Sell 27.5 -144 -1.10% $172.8
Feb 3, 2025 Feb 4, 2025 Dooley Mary Beth Officer Sell 27.5 -2,107 -13.91% $2.8K
Oct 29, 2024 Oct 30, 2024 Dooley Mary Beth Head of Finance Sell 37.5 -79 -0.52% $110.6
Apr 2, 2024 Apr 4, 2024 Dooley Mary Beth Head of Finance Sell 27.5 -188 -1.22% $325.2
Apr 2, 2024 Apr 4, 2024 Awad Antoine COO Sell 27.5 -372 -1.09% $643.6
Mar 21, 2024 Dooley Mary Beth Head of Finance Neutral 52.5 - 0.00% -
Mar 19, 2024 Mar 21, 2024 Flynn James P Director Neutral 52.5 - 0.00% -
Mar 21, 2024 Flynn James P Director Neutral 52.5 - 0.00% -
Feb 16, 2024 Funicular Funds, LP 10% Owner Neutral 52.5 - 0.00% -
Jan 2, 2024 Jan 4, 2024 Hurter Patricia N. Director Neutral 52.5 - 0.00% -
Jan 2, 2024 Jan 4, 2024 Barrett Peter Director Neutral 52.5 - 0.00% -
Nov 10, 2023 Nov 14, 2023 Brennan Aoife CEO Neutral 52.5 - 0.00% -
Nov 10, 2023 Nov 14, 2023 JENSEN MICHAEL VANGSTED CFO Neutral 52.5 - 0.00% -
Nov 10, 2023 Nov 14, 2023 Awad Antoine COO Neutral 52.5 - 0.00% -
Oct 6, 2023 New Enterprise Associates 14, L.P. 10% Owner Neutral 52.5 - 0.00% -
Jun 22, 2023 Jun 26, 2023 Mathers Edward T Director Neutral 52.5 - 0.00% -
Jun 22, 2023 Jun 26, 2023 Shea Richard P Director Neutral 52.5 - 0.00% -
Jun 22, 2023 Jun 26, 2023 Leschly Nick Director Neutral 52.5 - 0.00% -
Jun 22, 2023 Jun 26, 2023 Burgess Michael F. Director Neutral 52.5 - 0.00% -
Jun 22, 2023 Jun 26, 2023 Kelly-Croswell Lisa Director Neutral 52.5 - 0.00% -
Jun 22, 2023 Jun 26, 2023 Heffernan Michael Thomas Director Neutral 52.5 - 0.00% -
Jun 22, 2023 Jun 26, 2023 Hurter Patricia N. Director Neutral 52.5 - 0.00% -
Jun 22, 2023 Jun 26, 2023 Barrett Peter Director Neutral 52.5 - 0.00% -
Apr 3, 2023 Apr 5, 2023 Brennan Aoife Officer Sell 36.3 -19,042 -6.92% $11K
Apr 3, 2023 Apr 5, 2023 Awad Antoine COO Sell 27.5 -6,438 -7.93% $3.7K
Apr 3, 2023 Apr 5, 2023 JENSEN MICHAEL VANGSTED CFO Sell 27.5 -2,553 -5.16% $1.5K
Jan 3, 2023 Jan 4, 2023 Barrett Peter Director Neutral 52.5 - 0.00% -
Jan 3, 2023 Jan 4, 2023 Hurter Patricia N. Director Neutral 52.5 - 0.00% -
Jun 9, 2022 Jun 13, 2022 Mathers Edward T Director Neutral 52.5 - 0.00% -
Jun 9, 2022 Jun 13, 2022 Leschly Nick Director Neutral 52.5 - 0.00% -
Jun 9, 2022 Jun 13, 2022 Barrett Peter Director Neutral 52.5 - 0.00% -
Jun 9, 2022 Jun 13, 2022 Burgess Michael F. Director Neutral 52.5 - 0.00% -
Jun 9, 2022 Jun 13, 2022 Hurter Patricia N. Director Neutral 52.5 - 0.00% -
Jun 9, 2022 Jun 13, 2022 Heffernan Michael Thomas Director Neutral 52.5 - 0.00% -
Jun 9, 2022 Jun 13, 2022 Kelly-Croswell Lisa Director Neutral 52.5 - 0.00% -
Jun 9, 2022 Jun 13, 2022 Shea Richard P Director Neutral 52.5 - 0.00% -
May 24, 2022 May 25, 2022 JENSEN MICHAEL VANGSTED CFO Buy 91.3 +9,500 31.67% $10.6K
Apr 4, 2022 Apr 6, 2022 Brennan Aoife Officer Sell 41.3 -8,894 -3.13% $21.8K
Apr 4, 2022 Apr 6, 2022 Awad Antoine COO Sell 42.5 -2,650 -3.16% $6.5K
Mar 3, 2022 Mar 3, 2022 JENSEN MICHAEL VANGSTED CFO Neutral 90.0 +30,000 100.00% -
Mar 3, 2022 JENSEN MICHAEL VANGSTED CFO Neutral 52.5 - 0.00% -
Feb 4, 2022 Feb 8, 2022 Brennan Aoife Officer Neutral 90.0 +106,920 60.30% -
Feb 4, 2022 Feb 8, 2022 Awad Antoine COO Neutral 90.0 +40,820 94.93% -
Dec 6, 2021 Feb 1, 2022 BELOFF GREGG Officer Neutral 52.5 - 0.00% -
Jan 3, 2022 Jan 5, 2022 Barrett Peter Director Neutral 52.5 - 0.00% -
Jun 10, 2021 Jun 14, 2021 Mathers Edward T Director Neutral 52.5 - 0.00% -
Jun 10, 2021 Jun 14, 2021 Shea Richard P Director Neutral 52.5 - 0.00% -
Jun 10, 2021 Jun 14, 2021 Burgess Michael F. Director Neutral 52.5 - 0.00% -
Jun 10, 2021 Jun 14, 2021 Leschly Nick Director Neutral 52.5 - 0.00% -
Jun 10, 2021 Jun 14, 2021 Kelly-Croswell Lisa Director Neutral 52.5 - 0.00% -
Jun 10, 2021 Jun 14, 2021 Hurter Patricia N. Director Neutral 52.5 - 0.00% -
Jun 10, 2021 Jun 14, 2021 Heffernan Michael Thomas Director Neutral 52.5 - 0.00% -
Jun 10, 2021 Jun 14, 2021 Barrett Peter Director Neutral 52.5 - 0.00% -
Apr 20, 2021 Apr 22, 2021 ORBIMED ADVISORS LLC Director Neutral 90.0 +1,666,666 82.10% -
Apr 20, 2021 Apr 22, 2021 Khuong Chau Quang Director Neutral 90.0 +1,666,666 82.10% -
Mar 10, 2021 Mar 12, 2021 Riese Richard J. Chief Medical Officer Neutral 90.0 +17,500 81.40% -
Mar 10, 2021 Mar 12, 2021 Brennan Aoife Officer Neutral 90.0 +71,250 67.17% -
Mar 10, 2021 Mar 12, 2021 Awad Antoine COO Neutral 90.0 +17,500 68.63% -
Feb 9, 2021 Feb 11, 2021 Kelly-Croswell Lisa Director Neutral 52.5 - 0.00% -
Feb 11, 2021 Kelly-Croswell Lisa Director Neutral 52.5 - 0.00% -
Jan 4, 2021 Jan 5, 2021 Barrett Peter Director Neutral 52.5 - 0.00% -
Dec 8, 2020 Dec 9, 2020 Heffernan Michael Thomas Director Neutral 52.5 - 0.00% -
Dec 9, 2020 Heffernan Michael Thomas Director Neutral 52.5 - 0.00% -
Aug 10, 2020 Awad Antoine COO Neutral 52.5 - 0.00% -
Jul 24, 2020 Jul 28, 2020 Barrett Peter Director Neutral 52.5 - 0.00% -
Jan 2, 2020 Jul 28, 2020 Barrett Peter Director Neutral 52.5 - 0.00% -
Jun 4, 2020 Jun 8, 2020 Hurter Patricia N. Director Neutral 52.5 - 0.00% -
Jun 4, 2020 Jun 8, 2020 Mathers Edward T Director Neutral 52.5 - 0.00% -
Jun 4, 2020 Jun 8, 2020 Khuong Chau Quang Director Neutral 52.5 - 0.00% -
Jun 4, 2020 Jun 8, 2020 Shea Richard P Director Neutral 52.5 - 0.00% -
Jun 4, 2020 Jun 8, 2020 Burgess Michael F. Director Neutral 52.5 - 0.00% -
Jun 4, 2020 Jun 8, 2020 Leschly Nick Director Neutral 52.5 - 0.00% -
Jun 4, 2020 Jun 8, 2020 Barrett Peter Director Neutral 52.5 - 0.00% -
Mar 10, 2020 Mar 12, 2020 Riese Richard J. Chief Medical Officer Neutral 90.0 +13,500 168.75% -
Mar 10, 2020 Mar 12, 2020 Brennan Aoife Officer Neutral 90.0 +46,300 77.47% -
Feb 3, 2020 Feb 4, 2020 Burgess Michael F. Director Neutral 52.5 - 0.00% -
Feb 4, 2020 Burgess Michael F. Director Neutral 52.5 - 0.00% -
Dec 31, 2019 Jan 2, 2020 Riese Richard J. Chief Medical Officer Neutral 52.5 - 0.00% -
Dec 13, 2019 Dec 16, 2019 Shea Richard P Director Buy 91.3 +7,500 100.00% $20.6K
Oct 23, 2019 Oct 24, 2019 BELOFF GREGG Officer Neutral 52.5 - 0.00% -
Oct 24, 2019 BELOFF GREGG Officer Neutral 52.5 - 0.00% -
Sep 23, 2019 Sep 25, 2019 PLEVY SCOTT ERIC Chief Scientific Officer Neutral 90.0 +8,000 100.00% -
Sep 23, 2019 Sep 25, 2019 Riese Richard J. Chief Medical Officer Neutral 90.0 +8,000 100.00% -
Sep 23, 2019 Sep 25, 2019 Brennan Aoife Officer Neutral 90.0 +8,000 15.45% -
Sep 18, 2019 Riese Richard J. Chief Medical Officer Neutral 52.5 - 0.00% -
Jun 28, 2019 Jul 1, 2019 PLEVY SCOTT ERIC Chief Scientific Officer Neutral 52.5 - 0.00% -
Jun 21, 2019 Ginkgo Bioworks, Inc. 10% Owner Neutral 52.5 - 0.00% -
Jun 5, 2019 Jun 7, 2019 Mathers Edward T Director Neutral 52.5 - 0.00% -
Jun 5, 2019 Jun 7, 2019 Leschly Nick Director Neutral 52.5 - 0.00% -
Jun 5, 2019 Jun 7, 2019 Hurter Patricia N. Director Neutral 52.5 - 0.00% -
Jun 5, 2019 Jun 7, 2019 Barrett Peter Director Neutral 52.5 - 0.00% -
Jun 5, 2019 Jun 7, 2019 POWELL MICHAEL Director Neutral 52.5 - 0.00% -
Jun 5, 2019 Jun 7, 2019 Khuong Chau Quang Director Neutral 52.5 - 0.00% -
Jun 5, 2019 Jun 7, 2019 Shea Richard P Director Neutral 52.5 - 0.00% -
May 7, 2019 PLEVY SCOTT ERIC Chief Scientific Officer Neutral 52.5 - 0.00% -
Jan 2, 2019 Apr 9, 2019 Barrett Peter Director Neutral 52.5 - 0.00% -
Mar 5, 2019 Mar 6, 2019 Brennan Aoife Officer Neutral 52.5 - 0.00% -