| UNITED STATES |
| SECURITIES AND EXCHANGE COMMISSION |
| Washington, D.C. 20549 |
| Notice of Effectiveness |
| Effectiveness Date: |
February 10,
2026 |
| Accession Number: |
0001104659-26-012151 |
| Submission Type: |
POS AM |
| CIK: |
0001733294 |
| Company Name: |
Generation Bio Co. |
| File Number: |
333-281335 |
|
