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, Q3 2024
Institutional positions in Generation Bio Co. as of Sep 30, 2024. 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
- 77
- −1 vs. Q2 2024
- Shares held
- 55.2M
- +3.05M (+5.8%) vs. Q2 2024
- Total value
- $136.4M
- −$10.8M (−7.3%) vs. Q2 2024
- New holders
- 6
- 21 more added
- Sold out
- 7
- 28 more reduced
1 institution that held it in Q2 2024 haven't filed for Q3 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2024: 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, Q3 2024
Shares, value and share of portfolio for each institution holding Generation Bio Co.; share changes are against Q2 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Price T Rowe Associates Inc | 9,351,590 | $23.1M | 0.00% | −162,036−1.7% | Reduced |
| Atlas Venture Life Science Advisors, LLC | 8,279,484 | $20.5M | 1.90% | 00.0% | Unchanged |
| FMR LLC | 5,320,266 | $13.1M | 0.00% | +15,656+0.3% | Added |
| Bellevue Group AG | 3,918,856 | $9.68M | 0.16% | 00.0% | Unchanged |
| BlackRock, Inc. | 3,415,998 | $8.44M | 0.00% | +3,415,998 | New |
| Bank of America Corp | 2,983,092 | $7.37M | 0.00% | +1,644+0.1% | Added |
| Siren, L.L.C. | 2,982,733 | $7.37M | 0.37% | +2,982,733 | New |
| Vanguard Group Inc | 2,635,722 | $6.51M | 0.00% | +47,150+1.8% | Added |
| EcoR1 Capital, LLC | 2,046,867 | $5.06M | 0.17% | 00.0% | Unchanged |
| Baker Bros. Advisors LP | 1,944,945 | $4.80M | 0.05% | +737,988+61.1% | Added |
| Goldman Sachs Group Inc | 1,188,203 | $2.93M | 0.00% | −86,813−6.8% | Reduced |
| Geode Capital Management, LLC | 1,139,167 | $2.81M | 0.00% | +3,253+0.3% | Added |
| Morgan Stanley | 999,671 | $2.47M | 0.00% | +63,275+6.8% | Added |
| State Street Corp | 992,188 | $2.45M | 0.00% | +11,669+1.2% | Added |
| UBS Group AG | 846,886 | $2.09M | 0.00% | +9,038+1.1% | Added |
| PFM Health Sciences, LP | 787,914 | $1.95M | 0.11% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 605,812 | $1.50M | 0.00% | +11,243+1.9% | Added |
| Renaissance Technologies LLC | 594,300 | $1.47M | 0.00% | −42,100−6.6% | Reduced |
| D. E. Shaw & Co., Inc. | 488,149 | $1.21M | 0.00% | +609+0.1% | Added |
| Dimensional Fund Advisors LP | 441,117 | $1.09M | 0.00% | −44,279−9.1% | Reduced |
| Charles Schwab Investment Management Inc | 423,299 | $1.05M | 0.00% | +8,692+2.1% | Added |
| Northern Trust Corp | 391,820 | $967.8K | 0.00% | +25,908+7.1% | Added |
| TD Asset Management Inc | 340,686 | $827.9K | 0.00% | 00.0% | Unchanged |
| Bridgeway Capital Management, LLC | 324,000 | $800.3K | 0.02% | +50,000+18.2% | Added |
| Los Angeles Capital Management LLC | 295,727 | $730.4K | 0.00% | −46,134−13.5% | Reduced |
| Jacobs Levy Equity Management, Inc | 273,445 | $675.4K | 0.00% | −27,608−9.2% | Reduced |
| Two Sigma Advisers, LP | 217,100 | $536.2K | 0.00% | −54,900−20.2% | Reduced |
| Yiheng Capital Management, L.P. | 191,530 | $473.1K | 0.09% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 170,192 | $420.4K | 0.00% | −3,502−2.0% | Reduced |
| Nuveen Asset Management, LLC | 169,265 | $418.1K | 0.00% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 163,978 | $405.0K | 0.00% | −595−0.4% | Reduced |
| Bank of New York Mellon Corp | 151,387 | $373.9K | 0.00% | −35,369−18.9% | Reduced |
| Palo Alto Investors LP | 150,475 | $371.7K | 0.05% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 149,899 | $370.3K | 0.00% | −79,520−34.7% | Reduced |
| Panagora Asset Management Inc | 87,528 | $216.2K | 0.00% | −92−0.1% | Reduced |
| Barclays PLC | 76,430 | $188.8K | 0.00% | +47,639+165.5% | Added |
| Rhumbline Advisers | 75,619 | $186.8K | 0.00% | −3,284−4.2% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 73,718 | $182.1K | 0.00% | −2,840−3.7% | Reduced |
| Alliancebernstein L.P. | 72,155 | $178.2K | 0.00% | 00.0% | Unchanged |
| Prudential Financial Inc | 50,975 | $125.9K | 0.00% | 00.0% | Unchanged |
| Kestra Private Wealth Services, LLC | 42,000 | $103.7K | 0.00% | +10,000+31.3% | Added |
| Citigroup Inc | 37,116 | $91.7K | 0.00% | +25,982+233.4% | Added |
| Jane Street Group, LLC | 34,783 | $85.9K | 0.00% | −14,835−29.9% | Reduced |
| American Century Companies Inc | 31,316 | $77.4K | 0.00% | −470−1.5% | Reduced |
| Cornercap Investment Counsel Inc | 28,995 | $71.6K | 0.02% | −28,429−49.5% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 27,493 | $67.9K | 0.00% | +4,715+20.7% | Added |
| Wells Fargo & Company | 27,053 | $66.8K | 0.00% | +976+3.7% | Added |
| Corebridge Financial, Inc. | 26,455 | $65.3K | 0.00% | −164−0.6% | Reduced |
| Deutsche Bank AG | 23,351 | $57.7K | 0.00% | −534,645−95.8% | Reduced |
| XTX Topco Ltd | 17,922 | $44.3K | 0.00% | −114,794−86.5% | Reduced |
| Voya Investment Management LLC | 17,201 | $42.5K | 0.00% | 00.0% | Unchanged |
| SG Americas Securities, LLC | 17,067 | $42.0K | 0.00% | +17,067 | New |
| PFG Advisors | 15,000 | $37.0K | 0.00% | 00.0% | Unchanged |
| Ameriprise Financial Inc | 14,274 | $35.3K | 0.00% | −3,500−19.7% | Reduced |
| Invesco Ltd. | 12,413 | $30.7K | 0.00% | −939−7.0% | Reduced |
| Royal Bank of Canada | 11,835 | $30.0K | 0.00% | +1,165+10.9% | Added |
| Public Employees Retirement System of Ohio | 5,641 | $13.9K | 0.00% | −2,859−33.6% | Reduced |
| Russell Investments Group, Ltd. | 5,061 | $12.5K | 0.00% | +149+3.0% | Added |
| MetLife Investment Management | 4,304 | $10.6K | 0.00% | −24,092−84.8% | Reduced |
| Legal & General Group Plc | 3,919 | $9.68K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 3,747 | $9.26K | 0.00% | −9,700−72.1% | Reduced |
| California State Teachers Retirement System | 3,585 | $8.86K | 0.00% | 00.0% | Unchanged |
| Fortitude Family Office, LLC | 3,351 | $8.28K | 0.00% | +3,351 | New |
| Ameritas Investment Partners, Inc. | 3,277 | $8.09K | 0.00% | 00.0% | Unchanged |
| New York State Common Retirement Fund | 2,682 | $6.63K | 0.00% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 2,106 | $5.20K | 0.00% | +2,106 | New |
| Amalgamated Bank | 1,526 | $4.00K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 107 | $264 | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 88 | $217 | 0.00% | −10−10.2% | Reduced |
| The PNC Financial Services Group, Inc. | 53 | $131 | 0.00% | 00.0% | Unchanged |
| GAMMA Investing LLC | 50 | $124 | 0.00% | −29−36.7% | Reduced |
| Capital Performance Advisors LLP | 45 | $111 | 0.00% | +45 | New |
| SRS Capital Advisors, Inc. | 38 | $94 | 0.00% | 00.0% | Unchanged |
| First Horizon Advisors, Inc. | 2 | $5 | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 1 | $2 | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 46 | $0 | 0.00% | +20+76.9% | Added |
| Capital Advisors, Ltd. LLC | 29 | $0 | 0.00% | −9−23.7% | Reduced |
| Artal Group S.A. | 0 | $0 | 0.00% | −2,830,591−100.0% | Sold out |
| Wellington Management Group LLP | 0 | $0 | 0.00% | −119,356−100.0% | Sold out |
| Millennium Management LLC | 0 | $0 | 0.00% | −97,948−100.0% | Sold out |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −49,475−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | 0 | $0 | 0.00% | −19,046−100.0% | Sold out |
| Sherbrooke Park Advisers LLC | 0 | $0 | 0.00% | −11,157−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −172−100.0% | Sold out |
| BlackRock Inc. | – | – | – | – | Not filed |