CIK 0001733294
GBIO Generation Bio Co.
Insider trading from SEC Form 4. Last filing Feb 9, 2026.
Last 90 days
Net insider value
$0
no open-market trades
Buys
0
$0 by 0 insiders
Sells
0
$0 by 0 insiders
Insiders on file
13
with a Form 4 at this company
Signals
Open-market buys and sells at Generation Bio Co., scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 37Weak | Anthony G. Quinn director buy | $203k 210,791 shares | +238% | - |
Transactions
The last 100 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Feb 9, 2026 | Dannielle Appelhans director | UTender of shares Common Stock | -1,263 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Catherine Stehman-Breen director | UTender of shares Common Stock | -4,752 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Charles A Rowland Jr director | UTender of shares Common Stock | -53,475 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Donald William Nicholson director | UTender of shares Common Stock | -21,357 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Anthony G. Quinn director | UTender of shares Common Stock | -29,928 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Kevin John Conway CHIEF FINANCIAL OFFICER | UTender of shares Common Stock | -2,072 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jason P Rhodes director | UTender of shares Common Stockindirect: See Footnote | -711,193 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Geoff McDonough PRESIDENT AND CEO | UTender of shares Common Stock | -138,492 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Ronald Harold Wilfred Cooper director | UTender of shares Common Stock | -950 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Atlas Venture Fund X, L.P. owner | UTender of shares Common Stock | -711,193 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Yalonda Howze INTERIM CEO AND PRESIDENT | UTender of shares Common Stock | -3,759 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Gustav Christensen director | UTender of shares Common Stock | -13,142 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jeffrey M Jonas director | DDisposition to issuer Stock Option (right to buy)derivative | -3,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Ronald Harold Wilfred Cooper director | DDisposition to issuer Stock Option (right to buy)derivative | -3,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jeffrey M Jonas director | DDisposition to issuer Stock Option (right to buy)derivative | -4,246 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Gustav Christensen director | DDisposition to issuer Stock Option (right to buy)derivative | -3,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Dannielle Appelhans director | UTender of shares Common Stockindirect: By Spouse | -736 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Charles A Rowland Jr director | DDisposition to issuer Stock Option (right to buy)derivative | -3,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Atlas Venture Fund X, L.P. owner | UTender of shares Common Stockindirect: See footnote | -116,693 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Yalonda Howze INTERIM CEO AND PRESIDENT | DDisposition to issuer Stock Option (right to buy)derivative | -10,710 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Anthony G. Quinn director | UTender of shares Common Stockindirect: By Quinn Family Irrevocable Trust of 2021 | -7,283 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Kevin John Conway CHIEF FINANCIAL OFFICER | DDisposition to issuer Stock Option (right to buy)derivative | -1,192 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jason P Rhodes director | UTender of shares Common Stockindirect: See Footnote | -116,693 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Geoff McDonough PRESIDENT AND CEO | UTender of shares Common Stockindirect: By 2018 Trust | -22,646 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Catherine Stehman-Breen director | DDisposition to issuer Stock Option (right to buy)derivative | -3,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Donald William Nicholson director | DDisposition to issuer Stock Option (right to buy)derivative | -3,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Anthony G. Quinn director | DDisposition to issuer Stock Option (right to buy)derivative | -3,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Ronald Harold Wilfred Cooper director | DDisposition to issuer Stock Option (right to buy)derivative | -3,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jason P Rhodes director | UTender of shares Common Stockindirect: See Footnote | -60 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Kevin John Conway CHIEF FINANCIAL OFFICER | DDisposition to issuer Stock Option (right to buy)derivative | -283 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Yalonda Howze INTERIM CEO AND PRESIDENT | DDisposition to issuer Stock Option (right to buy)derivative | -11,883 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Charles A Rowland Jr director | DDisposition to issuer Stock Option (right to buy)derivative | -4,246 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Catherine Stehman-Breen director | DDisposition to issuer Stock Option (right to buy)derivative | -5,200 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Atlas Venture Fund X, L.P. owner | UTender of shares Common Stockindirect: See footnote | -60 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Gustav Christensen director | DDisposition to issuer Stock Option (right to buy)derivative | -5,200 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jeffrey M Jonas director | DDisposition to issuer Stock Option (right to buy)derivative | -5,200 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Geoff McDonough PRESIDENT AND CEO | UTender of shares Common Stockindirect: By 2020 Trust | -27,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Dannielle Appelhans director | DDisposition to issuer Stock Option (right to buy)derivative | -3,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Donald William Nicholson director | DDisposition to issuer Stock Option (right to buy)derivative | -5,200 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Ronald Harold Wilfred Cooper director | DDisposition to issuer Stock Option (right to buy)derivative | -1,920 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Kevin John Conway CHIEF FINANCIAL OFFICER | DDisposition to issuer Stock Option (right to buy)derivative | -1,061 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Yalonda Howze INTERIM CEO AND PRESIDENT | DDisposition to issuer Stock Option (right to buy)derivative | -25,102 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Charles A Rowland Jr director | DDisposition to issuer Stock Option (right to buy)derivative | -5,200 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Anthony G. Quinn director | DDisposition to issuer Stock Option (right to buy)derivative | -5,200 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jeffrey M Jonas director | DDisposition to issuer Stock Option (right to buy)derivative | -1,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Geoff McDonough PRESIDENT AND CEO | DDisposition to issuer Stock Option (right to buy)derivative | -19,903 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Gustav Christensen director | DDisposition to issuer Stock Option (right to buy)derivative | -1,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Catherine Stehman-Breen director | DDisposition to issuer Stock Option (right to buy)derivative | -1,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Dannielle Appelhans director | DDisposition to issuer Stock Option (right to buy)derivative | -3,840 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Donald William Nicholson director | DDisposition to issuer Stock Option (right to buy)derivative | -1,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Donald William Nicholson director | DDisposition to issuer Stock Option (right to buy)derivative | -1,920 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Dannielle Appelhans director | DDisposition to issuer Stock Option (right to buy)derivative | -2,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Anthony G. Quinn director | DDisposition to issuer Stock Option (right to buy)derivative | -1,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jason P Rhodes director | DDisposition to issuer Stock Option (right to buy)derivative | -3,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Kevin John Conway CHIEF FINANCIAL OFFICER | DDisposition to issuer Stock Option (right to buy)derivative | -621 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Yalonda Howze INTERIM CEO AND PRESIDENT | DDisposition to issuer Stock Option (right to buy)derivative | -7,630 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jeffrey M Jonas director | DDisposition to issuer Stock Option (right to buy)derivative | -1,920 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Ronald Harold Wilfred Cooper director | DDisposition to issuer Stock Option (right to buy)derivative | -2,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Charles A Rowland Jr director | DDisposition to issuer Stock Option (right to buy)derivative | -1,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Catherine Stehman-Breen director | DDisposition to issuer Stock Option (right to buy)derivative | -1,920 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Geoff McDonough PRESIDENT AND CEO | DDisposition to issuer Stock Option (right to buy)derivative | -25,099 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Gustav Christensen director | DDisposition to issuer Stock Option (right to buy)derivative | -1,920 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Donald William Nicholson director | DDisposition to issuer Stock Option (right to buy)derivative | -2,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Dannielle Appelhans director | DDisposition to issuer Stock Option (right to buy)derivative | -6,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Anthony G. Quinn director | DDisposition to issuer Stock Option (right to buy)derivative | -1,920 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Ronald Harold Wilfred Cooper director | DDisposition to issuer Stock Option (right to buy)derivative | -6,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jason P Rhodes director | DDisposition to issuer Stock Option (right to buy)derivative | -5,200 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Charles A Rowland Jr director | DDisposition to issuer Stock Option (right to buy)derivative | -1,920 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Kevin John Conway CHIEF FINANCIAL OFFICER | DDisposition to issuer Stock Option (right to buy)derivative | -1,399 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Catherine Stehman-Breen director | DDisposition to issuer Stock Option (right to buy)derivative | -2,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Geoff McDonough PRESIDENT AND CEO | DDisposition to issuer Stock Option (right to buy)derivative | -37,499 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jeffrey M Jonas director | DDisposition to issuer Stock Option (right to buy)derivative | -2,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Gustav Christensen director | DDisposition to issuer Stock Option (right to buy)derivative | -2,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Gustav Christensen director | DDisposition to issuer Stock Option (right to buy)derivative | -6,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Donald William Nicholson director | DDisposition to issuer Stock Option (right to buy)derivative | -6,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Anthony G. Quinn director | DDisposition to issuer Stock Option (right to buy)derivative | -2,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jason P Rhodes director | DDisposition to issuer Stock Option (right to buy)derivative | -1,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Charles A Rowland Jr director | DDisposition to issuer Stock Option (right to buy)derivative | -2,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Kevin John Conway CHIEF FINANCIAL OFFICER | DDisposition to issuer Stock Option (right to buy)derivative | -2,585 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jeffrey M Jonas director | DDisposition to issuer Stock Option (right to buy)derivative | -6,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Geoff McDonough PRESIDENT AND CEO | DDisposition to issuer Stock Option (right to buy)derivative | -50,624 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Catherine Stehman-Breen director | DDisposition to issuer Stock Option (right to buy)derivative | -6,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Anthony G. Quinn director | DDisposition to issuer Stock Option (right to buy)derivative | -6,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jason P Rhodes director | DDisposition to issuer Stock Option (right to buy)derivative | -1,920 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Charles A Rowland Jr director | DDisposition to issuer Stock Option (right to buy)derivative | -6,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Kevin John Conway CHIEF FINANCIAL OFFICER | DDisposition to issuer Stock Option (right to buy)derivative | -2,800 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Geoff McDonough PRESIDENT AND CEO | DDisposition to issuer Stock Option (right to buy)derivative | -90,168 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jason P Rhodes director | DDisposition to issuer Stock Option (right to buy)derivative | -2,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Kevin John Conway CHIEF FINANCIAL OFFICER | DDisposition to issuer Stock Option (right to buy)derivative | -5,940 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Geoff McDonough PRESIDENT AND CEO | DDisposition to issuer Stock Option (right to buy)derivative | -16,874 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Jason P Rhodes director | DDisposition to issuer Stock Option (right to buy)derivative | -6,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Kevin John Conway CHIEF FINANCIAL OFFICER | DDisposition to issuer Stock Option (right to buy)derivative | -200 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Geoff McDonough PRESIDENT AND CEO | DDisposition to issuer Stock Option (right to buy)derivative | -24,046 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Kevin John Conway CHIEF FINANCIAL OFFICER | DDisposition to issuer Stock Option (right to buy)derivative | -249 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Kevin John Conway CHIEF FINANCIAL OFFICER | DDisposition to issuer Stock Option (right to buy)derivative | -35,525 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Kevin John Conway CHIEF FINANCIAL OFFICER | DDisposition to issuer Stock Option (right to buy)derivative | -1,877 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Kevin John Conway CHIEF FINANCIAL OFFICER | DDisposition to issuer Stock Option (right to buy)derivative | -550 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | Kevin John Conway CHIEF FINANCIAL OFFICER | DDisposition to issuer Stock Option (right to buy)derivative | -1,763 | - | - | 0 | Feb 9, 2026 |
| Feb 2, 2026 | Geoff McDonough PRESIDENT AND CEO | MOption exercise Common Stock | +1,582 | - | - | 139,042 | Feb 4, 2026 |
| Feb 2, 2026 | Kevin John Conway Chief Financial Officer | MOption exercise Common Stock | +235 | - | - | 2,144 | Feb 4, 2026 |
Insiders
Everyone who has filed a Form 4 here.
- Dannielle Appelhansdirector
- Atlas Venture Fund X, L.P.owner
- Gustav Christensendirector
- Kevin John ConwayCHIEF FINANCIAL OFFICER
- Ronald Harold Wilfred Cooperceo, president, officer, director
- Yalonda HowzeINTERIM CEO AND PRESIDENT
- Jeffrey M Jonasdirector
- Geoff McDonoughPRESIDENT AND CEO
- Donald William Nicholsondirector
- Anthony G. Quinndirector
- Jason P Rhodesdirector
- Charles A Rowland Jrdirector
- Catherine Stehman-Breendirector
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.