Generation Bio Co.
GBIODelisted Feb 9, 2026- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001733294
Generation Bio Co. was delisted on Feb 9, 2026; its insiders filed their last Form 4 on Feb 9, 2026; 48 institutions reported holding it in 13F filings for Q4 2025, worth $24.5M in total; no superinvestor held it.
Q1 2025 vs. Q4 2024
How the institutions holding Generation Bio Co. changed between Q4 2024 and Q1 2025.
All holders in Q1 2025All holders in Q4 2024
| Measure | Q4 2024 | Of which not filed for Q1 2025 | Q1 2025 | Change |
|---|---|---|---|---|
| Holders | 80 | 1 | 81 | +2 |
| Shares | 53.9M | 169.3K | 47.7M | −5.98M (−11.1%) |
| Value | $57.1M | $179.4K | $19.3M | −$37.6M (−66.0%) |
1 institution that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so the changes leave them out.
New holders (10)
Institutions that held Generation Bio Co. at the end of Q1 2025 but not at the end of Q4 2024.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| Nuveen, LLC | 169,265 | $68.6K | 0.00% |
| Ewa, LLC | 92,901 | $37.6K | 0.01% |
| AQR Capital Management LLC | 89,014 | $36.0K | 0.00% |
| XTX Topco Ltd | 52,440 | $21.2K | 0.00% |
| Kestra Private Wealth Services, LLC | 52,000 | $21.1K | 0.00% |
| Jane Street Group, LLC | 38,723 | $15.7K | 0.00% |
| Ieq Capital, LLC | 20,439 | $8.28K | 0.00% |
| Cerity Partners LLC | 16,852 | $6.83K | 0.00% |
| CIBC World Markets Corp | 10,979 | $4.45K | 0.00% |
| True Wealth Design, LLC | 129 | $53 | 0.00% |
Sold out (8)
Institutions that held Generation Bio Co. at the end of Q4 2024 and filed for Q1 2025 without it.
| Institution | Shares, Q4 2024 | Value, Q4 2024 |
|---|---|---|
| EcoR1 Capital, LLC | 2,046,867 | $2.17M |
| PFM Health Sciences, LP | 787,914 | $835.2K |
| D. E. Shaw & Co., Inc. | 344,922 | $365.6K |
| Millennium Management LLC | 91,578 | $97.1K |
| Connor, Clark & Lunn Investment Management Ltd. | 63,559 | $67.4K |
| Envestnet Asset Management Inc | 14,104 | $14.9K |
| Voya Investment Management LLC | 11,691 | $12.4K |
| Assetmark, Inc | 100 | $106 |
Not filed for Q1 2025 yet (1)
Institutions that held Generation Bio Co. at the end of Q4 2024 and haven't filed a 13F for Q1 2025. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q4 2024 | Value, Q4 2024 |
|---|---|---|
| Nuveen Asset Management, LLC | 169,265 | $179.4K |