Real time Form 13D and 13G transaction reports:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Due to inconsistent filing format, it is highly recommended that you read the orignal filing form.
- Shares have beem adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2025-08-14 1:07 pm Purchase | 2025-06-30 | 13G | Generation Bio Co. GBIO | T. Rowe Price Associates, Inc. | 8,462,611 12.600% | 8,462,611 (New Position) | Filing History |
| 2025-08-06 12:01 pm Purchase | 2025-06-30 | 13G | Generation Bio Co. GBIO | FMR LLC | 2,345,624 3.500% | 1,883,020 (+407.05%) | Filing History |
| 2025-07-17 7:54 pm Sale | 2025-06-30 | 13G | Generation Bio Co. GBIO | BlackRock Inc. BLK | 115,205 1.700% | -226,395 (-66.27%) | Filing History |
| 2025-02-12 09:28 am Sale | 2024-12-31 | 13G | Generation Bio Co. GBIO | FMR LLC | 462,605 6.900% | -72,635 (-13.57%) | Filing History |
| 2024-12-09 6:18 pm Sale | 2024-12-05 | 13G | Generation Bio Co. GBIO | BB BIOTECH AG | 331,087 5.000% | -29,741 (-8.24%) | Filing History |
| 2024-11-14 1:22 pm Purchase | 2024-09-30 | 13G | Generation Bio Co. GBIO | T. Rowe Price Associates, Inc. | 935,159 14.000% | 242,542 (+35.02%) | Filing History |
| 2024-11-08 2:17 pm Unchanged | 2024-09-30 | 13G | Generation Bio Co. GBIO | BlackRock Inc. BLK | 341,600 5.100% | 0 (Unchanged) | Filing History |
| 2024-10-23 5:04 pm Purchase | 2024-09-30 | 13G | Generation Bio Co. GBIO | BlackRock Inc. BLK | 341,600 5.100% | 24,758 (+7.81%) | Filing History |
| 2024-02-14 10:03 am Sale | 2023-12-31 | 13G | Generation Bio Co. GBIO | T. Rowe Price Associates, Inc. | 692,617 10.500% | -33,487 (-4.61%) | Filing History |
| 2024-02-13 06:17 am Unchanged | 2023-12-31 | 13G | Generation Bio Co. GBIO | BB BIOTECH AG | 360,828 5.500% | 0 (Unchanged) | Filing History |
| 2024-02-09 4:05 pm Unchanged | 2023-12-31 | 13G | Generation Bio Co. GBIO | Atlas Venture Fund X, L.P. | 711,194 10.800% | 0 (Unchanged) | Filing History |
| 2024-02-09 09:03 am Sale | 2024-02-08 | 13G | Generation Bio Co. GBIO | FMR LLC | 535,240 8.100% | -121,096 (-18.45%) | Filing History |
| 2024-01-08 4:35 pm Sale | 2023-12-31 | 13G | Generation Bio Co. GBIO | BlackRock Inc. BLK | 316,842 4.800% | -53,965 (-14.55%) | Filing History |
| 2023-12-11 09:09 am Sale | 2023-12-08 | 13G | Generation Bio Co. GBIO | FMR LLC | 656,336 9.932% | -234,997 (-26.36%) | Filing History |
| 2023-03-24 4:27 pm Purchase | 2023-03-24 | 13G | Generation Bio Co. GBIO | ModernaTX Inc. | 585,938 8.900% | 585,938 (New Position) | Filing History |
| 2023-02-14 4:18 pm Sale | 2022-12-31 | 13G | Generation Bio Co. GBIO | BB BIOTECH AG | 360,828 6.100% | -24,490 (-6.36%) | Filing History |
| 2023-02-14 4:06 pm Sale | 2022-12-31 | 13G | Generation Bio Co. GBIO | PFM Health Sciences, LP | 290,319 4.900% | -11,052 (-3.67%) | Filing History |
| 2023-02-14 12:40 pm Purchase | 2022-12-31 | 13G | Generation Bio Co. GBIO | T. Rowe Price Investment Management, Inc. | 357,776 6.000% | 357,776 (New Position) | Filing History |
| 2023-02-14 12:38 pm Sale | 2022-12-31 | 13G | Generation Bio Co. GBIO | T. Rowe Price Associates, Inc. | 726,105 12.200% | -138,608 (-16.03%) | Filing History |
| 2023-02-09 11:19 am Sale | 2022-12-30 | 13G | Generation Bio Co. GBIO | VANGUARD GROUP INC | 223,150 3.760% | -136,296 (-37.92%) | Filing History |