Over the past year there were no insider purchases at Synlogic, Inc.. One insider sold roughly $284 instead.
Selling on its own is common and often pre-planned (10b5-1 plans, taxes, diversification), so it matters more when it is unusually heavy or broad.
Looking at the quarterly pattern: No open-market insider buying or selling in the last full quarter. Insiders bought in 0 of the last 7 full quarters. Big money check: 1 institutions held SYBX as of Q2 2026, and more funds sold than bought.
| Filed | Insider | Role | Type | Shares | Price | Value | Source |
|---|---|---|---|---|---|---|---|
| Oct 31, 2025 | Dooley Mary Beth | Officer | Sell | 157 | $1.81 | $284 | SEC |
| Apr 3, 2025 | Dooley Mary Beth | Officer | Sell | 144 | $1.20 | $173 | SEC |
| Feb 4, 2025 | Dooley Mary Beth | Officer | Sell | 2,107 | $1.33 | $3K | SEC |
| Oct 30, 2024 | Dooley Mary Beth | Officer | Sell | 79 | $1.40 | $111 | SEC |
| Apr 4, 2024 | Dooley Mary Beth | Officer | Sell | 188 | $1.73 | $325 | SEC |
| Apr 4, 2024 | Awad Antoine | COO | Sell | 372 | $1.73 | $644 | SEC |
| Apr 5, 2023 | Awad Antoine | COO | Sell | 6,438 | $0.58 | $4K | SEC |
| Apr 5, 2023 | Brennan Aoife | Officer | Sell | 19,042 | $0.58 | $11K | SEC |
| Apr 5, 2023 | JENSEN MICHAEL VANGSTED | CFO | Sell | 2,553 | $0.58 | $1K | SEC |
In the last 12 months Synlogic, Inc. insiders made open-market purchases worth about $0 and sales worth about $284. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
The most recent open-market insider trade in SYBX was filed on 2025-10-31.
1 investment managers reported holding SYBX in SEC Form 13F filings for Q2 2026.
No congressional trades in SYBX were reported in the past two years. The full list is free on CapitalSnitch.
Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1). Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).