SYBX SEC Form 4 filings
Synlogic, Inc. Latest Insider Trading Activity
The most recent employee insider trading activity for Synlogic, Inc. was on October 29, 2025, when Dooley Mary Beth (See Remarks below) reported a sale of 157 shares at $1.81 per share. For the past 2,468 days, SYBX has had 10 total insider transactions represented in the displayed records. This page shows up to the 10 most recent SEC Form 4 filing records on a 6-hour delay. Sign up for real-time updates and access to 20 years of historic insider trading data.
Insider Trading For SYBX Charted on Daily Candles. Scroll left or zoom out to load earlier candles (up to 2 years).
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| Ticker | Filing Date | Transaction Date | Company | Insider | Title | Transaction | Trade Count | Shares | Avg. Price | Total Value | Position Size Change | SEC Filing |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting SYBX | 2025-10-31 | 2025-10-29 | Synlogic, Inc. | Dooley Mary Beth | See Remarks below | Sell | 1 | 157 | $1.81 | $284.17 | 1.22% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting SYBX | 2025-04-03 | 2025-04-02 | Synlogic, Inc. | Dooley Mary Beth | See Remarks below | Sell | 1 | 144 | $1.20 | $172.80 | 1.10% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting SYBX | 2024-10-30 | 2024-10-29 | Synlogic, Inc. | Dooley Mary Beth | Head of Finance | Sell | 1 | 79 | $1.40 | $110.60 | 0.52% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting SYBX | 2024-04-04 | 2024-04-02 | Synlogic, Inc. | Dooley Mary Beth | Head of Finance | Sell | 1 | 188 | $1.73 | $325.24 | 1.22% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting SYBX | 2024-04-04 | 2024-04-02 | Synlogic, Inc. | Awad Antoine | Chief Operating Officer | Sell | 1 | 372 | $1.73 | $643.56 | 1.09% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting SYBX | 2023-04-05 | 2023-04-03 | Synlogic, Inc. | Awad Antoine | Chief Operating Officer | Sell | 1 | 6,438 | $0.58 | $3,734.04 | 7.93% | View Filing |
| 10b5-1: Scheduled Form 4 Transaction SYBX | 2023-04-05 | 2023-04-03 | Synlogic, Inc. | Brennan Aoife | Officer | Sell | 1 | 19,042 | $0.58 | $11,044.36 | 6.92% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. SYBX | 2022-05-25 | 2022-05-24 | Synlogic, Inc. | Jensen Michael Vangsted | Chief Financial Officer | Buy | 1 | 9,500 | $1.12 | $10,640.00 | 24.05% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting SYBX | 2022-04-06 | 2022-04-04 | Synlogic, Inc. | Awad Antoine | Chief Operating Officer | Sell | 1 | 2,650 | $2.45 | $6,492.50 | 3.16% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. SYBX | 2019-12-16 | 2019-12-13 | Synlogic, Inc. | Shea Richard P | Director | Buy | 1 | 7,500 | $2.74 | $20,550.00 | 100.00% | View Filing |
⚠️ THE SAMPLE ABOVE IS DEFERRED BY 6 HOURS ⚠️
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