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, Q4 2022
Institutional positions in Generation Bio Co. as of Dec 31, 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
- 98
- −16 vs. Q3 2022
- Shares held
- 57.1M
- −563.2K (−1.0%) vs. Q3 2022
- Total value
- $224.5M
- −$81.8M (−26.7%) vs. Q3 2022
- New holders
- 10
- 41 more added
- Sold out
- 26
- 28 more reduced
1 institution that held it in Q3 2022 haven't filed for Q4 2022 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2022
Shares, value and share of portfolio for each institution holding Generation Bio Co.; share changes are against Q3 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Man Group plc | 0 | $0 | 0.00% | −40,675−100.0% | Sold out |
| AQR Capital Management LLC | 0 | $0 | 0.00% | −32,624−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −31,567−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −28,234−100.0% | Sold out |
| Algert Global LLC | 0 | $0 | 0.00% | −27,746−100.0% | Sold out |
| Massachusetts Financial Services Co | 0 | $0 | 0.00% | −25,678−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −22,761−100.0% | Sold out |
| Occudo Quantitative Strategies LP | 0 | $0 | 0.00% | −22,772−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | 0 | $0 | 0.00% | −22,246−100.0% | Sold out |
| Victory Capital Management Inc | 0 | $0 | 0.00% | −19,210−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −18,795−100.0% | Sold out |
| Acadian Asset Management LLC | 0 | $0 | 0.00% | −18,305−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −17,100−100.0% | Sold out |
| Principal Financial Group Inc | 0 | $0 | 0.00% | −11,448−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −5,067−100.0% | Sold out |
| Advisor Group Holdings, Inc. | 0 | $0 | 0.00% | −3,167−100.0% | Sold out |
| Ellevest, Inc. | 0 | $0 | 0.00% | −796−100.0% | Sold out |
| Macquarie Group Ltd | 0 | $0 | 0.00% | 0 | Sold out |
| Signaturefd, LLC | 0 | $0 | 0.00% | −444−100.0% | Sold out |
| Clearstead Advisors, LLC | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Federated Hermes, Inc. | 0 | $0 | 0.00% | −267−100.0% | Sold out |
| Clear Street Markets LLC | 0 | $0 | 0.00% | −215−100.0% | Sold out |
| Parallel Advisors, LLC | 0 | $0 | 0.00% | −154−100.0% | Sold out |
| Capital Advisors, Ltd. LLC | 0 | $0 | 0.00% | −35−100.0% | Sold out |
| Wipfli Financial Advisors LLC, | – | – | – | – | Not filed |