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.
13F holders, Q2 2022
Institutional positions in Generation Bio Co. as of Jun 30, 2022. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 95
- +9 vs. Q1 2022
- Shares held
- 55.4M
- −1.10M (−1.9%) vs. Q1 2022
- Total value
- $363.5M
- −$52.0M (−12.5%) vs. Q1 2022
- New holders
- 19
- 35 more added
- Sold out
- 10
- 25 more reduced
3 institutions that held it in Q1 2022 haven't filed for Q2 2022 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2022: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting GBIO on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 1 | $0 |
| Q1 2026 | 2 | $53.3K |
| Q4 2025 | 48 | $24.5M |
| Q3 2025 | 41 | $24.2M |
| Q2 2025 | 63 | $13.3M |
| Q1 2025 | 81 | $19.3M |
| Q4 2024 | 80 | $57.1M |
| Q3 2024 | 77 | $136.4M |
| Q2 2024 | 79 | $156.5M |
| Q1 2024 | 77 | $223.7M |
| Q4 2023 | 76 | $86.7M |
| Q3 2023 | 77 | $216.8M |
| Q2 2023 | 81 | $315.1M |
| Q1 2023 | 86 | $246.8M |
| Q4 2022 | 98 | $224.5M |
| Q3 2022 | 115 | $306.3M |
| Q2 2022 | 95 | $363.5M |
| Q1 2022 | 89 | $415.8M |
| Q4 2021 | 89 | $390.3M |
| Q3 2021 | 82 | $1.20B |
| Q2 2021 | 98 | $1.25B |
| Q1 2021 | 88 | $1.27B |
Institutions, Q2 2022
Shares, value and share of portfolio for each institution holding Generation Bio Co.; share changes are against Q1 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| ProShare Advisors LLC | 0 | $0 | 0.00% | −14,115−100.0% | Sold out |
| Rafferty Asset Management, LLC | 0 | $0 | 0.00% | −11,140−100.0% | Sold out |
| Prelude Capital Management, LLC | 0 | $0 | 0.00% | −10,098−100.0% | Sold out |
| RPg Family Wealth Advisory, LLC | 0 | $0 | 0.00% | −758−100.0% | Sold out |
| Capital Advisors, Ltd. LLC | 0 | $0 | 0.00% | −12−100.0% | Sold out |
| Parametric Portfolio Associates LLC | – | – | – | – | Not filed |
| Virginia Retirement Systems Et Al | – | – | – | – | Not filed |
| Amalgamated Financial Corp. | – | – | – | – | Not filed |