| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2024-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | Generation Bio Co. | 6,926,174 | 10.5% | EDGAR |
| SC 13G/A | 2024-02-13 | BB BIOTECH AG | Generation Bio Co. | 3,608,280 | 5.5% | EDGAR |
| SC 13G/A | 2024-02-09 | FMR LLC | Generation Bio Co. | 5,352,399 | 8.1% | EDGAR |
| SC 13G/A | 2024-02-09 | Atlas Venture Fund X, L.P. | Generation Bio Co. | 7,111,939 | 10.8% | EDGAR |
| SC 13G/A | 2024-01-08 | BlackRock Inc. | Generation Bio Co. | 3,168,415 | 4.8% | EDGAR |
| SC 13G/A | 2023-12-11 | FMR LLC | Generation Bio Co. | 6,563,359 | 9.9% | EDGAR |
| SC 13G | 2023-03-24 | ModernaTX, Inc. | Generation Bio Co. | 5,859,375 | 8.9% | EDGAR |
| SC 13G/A | 2023-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | Generation Bio Co. | 7,261,046 | 12.2% | EDGAR |
| SC 13G/A | 2023-02-14 | PFM Health Sciences, LP | Generation Bio Co. | - | 4.9% | EDGAR |
| SC 13G/A | 2023-02-14 | BB BIOTECH AG | Generation Bio Co. | 3,608,280 | 6.1% | EDGAR |
| SC 13G | 2023-02-14 | T. Rowe Price Investment Management, Inc. | Generation Bio Co. | 3,577,755 | 6.0% | EDGAR |
| SC 13G/A | 2023-02-09 | FMR LLC | Generation Bio Co. | 8,913,331 | 15.0% | EDGAR |
| SC 13G/A | 2023-02-09 | VANGUARD GROUP INC | Generation Bio Co. | 2,231,499 | 3.8% | EDGAR |
| SC 13G/A | 2023-02-01 | Farallon Capital Partners, L.P. | Generation Bio Co. | 400,932 | 0.0% | EDGAR |
| SC 13G/A | 2023-02-01 | BlackRock Inc. | Generation Bio Co. | 3,708,067 | 6.2% | EDGAR |
| SC 13G | 2022-09-06 | PFM Health Sciences, LP | Generation Bio Co. | - | 5.1% | EDGAR |
| SC 13G/A | 2022-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | Generation Bio Co. | 8,647,121 | 15.1% | EDGAR |
| SC 13G/A | 2022-02-11 | Artal International S.C.A. | Generation Bio Co. | 2,814,191 | 4.9% | EDGAR |
| SC 13G/A | 2022-02-11 | BB BIOTECH AG | Generation Bio Co. | 3,853,180 | 6.8% | EDGAR |
| SC 13G/A | 2022-02-11 | Atlas Venture Fund X, L.P. | Generation Bio Co. | 7,111,939 | 12.5% | EDGAR |