SYBX
SYNLOGIC, INC.
NASDAQ · Healthcare · Biotechnology · US
$0.96
−3.99%1
Insider buys (3m)
0
Insider sells (3m)
$1.8M
Net value (3m)
+36.2%
Price return (3m)
Form 4 filings
| Date | Insider | Activity | Shares | Price |
|---|---|---|---|---|
| Aug 14, 2026 | New Enterprise Associates 14, L.P. · director, 10 percent owner: | Purchase | 2,640,845 | $0.70 |
| Oct 31, 2025 | Dooley Mary Beth · officer: See Remarks below | Sale | 157 | $1.81 |
| Apr 29, 2025 | Shea Richard P · director | A-Award | 15,000 | $0.00 |
| Apr 29, 2025 | Flynn James P · director | A-Award | 15,000 | $0.00 |
| Apr 3, 2025 | Dooley Mary Beth · officer: See Remarks below | Sale | 144 | $1.20 |
| Feb 4, 2025 | Dooley Mary Beth · officer: See Remarks below | Sale | 2,107 | $1.33 |
| Oct 30, 2024 | Dooley Mary Beth · officer: Head of Finance | Sale | 79 | $1.40 |
| Apr 4, 2024 | Dooley Mary Beth · officer: Head of Finance | Sale | 188 | $1.73 |
| Apr 4, 2024 | Awad Antoine · officer: Chief Operating Officer | Sale | 372 | $1.73 |
| Mar 21, 2024 | Flynn James P · director | A-Award | 4,000 | $1.78 |
| Jan 4, 2024 | Hurter Patricia N. · director | A-Award | 14,678 | $4.47 |
| Jan 4, 2024 | Barrett Peter · director | A-Award | 24,923 | $4.47 |
| Nov 14, 2023 | JENSEN MICHAEL VANGSTED · officer: Chief Financial Officer | A-Award | 6,666 | $1.85 |
| Nov 14, 2023 | Awad Antoine · officer: Chief Operating Officer | A-Award | 16,666 | $1.85 |
| Nov 14, 2023 | Awad Antoine · officer: Chief Operating Officer | A-Award | 11,031 | $1.85 |
| Nov 14, 2023 | Awad Antoine · officer: Chief Operating Officer | A-Award | 6,666 | $1.85 |
| Nov 14, 2023 | Awad Antoine · officer: Chief Operating Officer | A-Award | 4,666 | $1.85 |
| Nov 14, 2023 | Awad Antoine · officer: Chief Operating Officer | A-Award | 3,666 | $1.85 |
| Nov 14, 2023 | Awad Antoine · officer: Chief Operating Officer | A-Award | 666 | $1.85 |
| Nov 14, 2023 | JENSEN MICHAEL VANGSTED · officer: Chief Financial Officer | A-Award | 15,332 | $1.85 |
| Nov 14, 2023 | Brennan Aoife · director, officer: President and CEO | A-Award | 42,999 | $1.85 |
| Nov 14, 2023 | Brennan Aoife · director, officer: President and CEO | A-Award | 28,943 | $1.85 |
| Nov 14, 2023 | Brennan Aoife · director, officer: President and CEO | A-Award | 18,999 | $1.85 |
| Nov 14, 2023 | Brennan Aoife · director, officer: President and CEO | A-Award | 12,352 | $1.85 |
| Nov 14, 2023 | Brennan Aoife · director, officer: President and CEO | A-Award | 12,332 | $1.85 |
| Nov 14, 2023 | Brennan Aoife · director, officer: President and CEO | A-Award | 9,999 | $1.85 |
| Nov 14, 2023 | Brennan Aoife · director, officer: President and CEO | A-Award | 8,666 | $1.85 |
| Nov 14, 2023 | Brennan Aoife · director, officer: President and CEO | A-Award | 5,591 | $1.85 |
| Nov 14, 2023 | Brennan Aoife · director, officer: President and CEO | A-Award | 3,733 | $1.85 |
| Nov 14, 2023 | Brennan Aoife · director, officer: President and CEO | A-Award | 3,600 | $1.85 |
Institutional positioning
13F filings over the trailing two quarters
New 0Increased 0Reduced 1Sold out 2
| Filer | Action | Shares | Filed |
|---|---|---|---|
| DRW SECURITIES, LLC | Reduced | 23,763 | May 13, 2026 |
| MORGAN STANLEY | Sold Out | 0 | May 27, 2026 |
| DRW Securities, LLC | Sold Out | 0 | May 13, 2026 |
Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Aug 14, 2026