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 2023
Institutional positions in Generation Bio Co. as of Dec 31, 2023. 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
- 76
- −1 vs. Q3 2023
- Shares held
- 52.6M
- −4.64M (−8.1%) vs. Q3 2023
- Total value
- $86.7M
- −$130.1M (−60.0%) vs. Q3 2023
- New holders
- 18
- 33 more added
- Sold out
- 19
- 15 more reduced
Compare with Q3 2023: 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 2023
Shares, value and share of portfolio for each institution holding Generation Bio Co.; share changes are against Q3 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Atlas Venture Life Science Advisors, LLC | 8,279,484 | $13.7M | 1.63% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 6,926,174 | $11.4M | 0.00% | −528,529−7.1% | Reduced |
| FMR LLC | 5,352,399 | $8.83M | 0.00% | −3,080,374−36.5% | Reduced |
| Bellevue Group AG | 3,617,080 | $5.97M | 0.09% | 00.0% | Unchanged |
| BlackRock Inc. | 3,168,415 | $5.23M | 0.00% | −185,321−5.5% | Reduced |
| Artal Group S.A. | 2,814,191 | $4.64M | 0.16% | 00.0% | Unchanged |
| Vanguard Group Inc | 2,552,251 | $4.21M | 0.00% | +213,467+9.1% | Added |
| Bank of America Corp | 2,527,862 | $4.17M | 0.00% | +2,020,340+398.1% | Added |
| EcoR1 Capital, LLC | 2,046,867 | $3.38M | 0.09% | 00.0% | Unchanged |
| PFM Health Sciences, LP | 1,622,487 | $2.68M | 0.16% | −891,956−35.5% | Reduced |
| Deutsche Bank AG | 1,232,316 | $2.03M | 0.00% | +1,213,116+6,318.3% | Added |
| Goldman Sachs Group Inc | 1,159,506 | $1.91M | 0.00% | +469,037+67.9% | Added |
| Geode Capital Management, LLC | 1,077,963 | $1.78M | 0.00% | +66,193+6.5% | Added |
| Morgan Stanley | 1,064,064 | $1.76M | 0.00% | +561,094+111.6% | Added |
| State Street Corp | 921,987 | $1.52M | 0.00% | +8,237+0.9% | Added |
| UBS Group AG | 867,399 | $1.43M | 0.00% | +469,793+118.2% | Added |
| Millennium Management LLC | 752,745 | $1.24M | 0.00% | +722,074+2,354.3% | Added |
| Renaissance Technologies LLC | 689,400 | $1.14M | 0.00% | +374,600+119.0% | Added |
| Dimensional Fund Advisors LP | 683,100 | $1.13M | 0.00% | −78,319−10.3% | Reduced |
| Charles Schwab Investment Management Inc | 381,480 | $629.4K | 0.00% | +4,867+1.3% | Added |
| Northern Trust Corp | 373,085 | $615.6K | 0.00% | +2,223+0.6% | Added |
| TD Asset Management Inc | 340,686 | $562.1K | 0.00% | −65,912−16.2% | Reduced |
| Two Sigma Investments, LP | 317,077 | $523.2K | 0.00% | +317,077 | New |
| JPMorgan Chase & Co | 285,886 | $471.7K | 0.00% | −1,124,560−79.7% | Reduced |
| D. E. Shaw & Co., Inc. | 283,108 | $467.1K | 0.00% | +258,122+1,033.1% | Added |
| Los Angeles Capital Management LLC | 275,834 | $455.1K | 0.00% | +209,462+315.6% | Added |
| Bridgeway Capital Management, LLC | 243,000 | $400.9K | 0.01% | +243,000 | New |
| Nuveen Asset Management, LLC | 228,945 | $377.8K | 0.00% | +2,573+1.1% | Added |
| Acadian Asset Management LLC | 224,367 | $368.0K | 0.00% | +224,367 | New |
| Two Sigma Advisers, LP | 212,400 | $350.5K | 0.00% | +194,700+1,100.0% | Added |
| Bank of New York Mellon Corp | 159,537 | $263.2K | 0.00% | +10.0% | Added |
| XTX Topco Ltd | 146,403 | $241.6K | 0.05% | +146,403 | New |
| Manufacturers Life Insurance Company, The | 144,319 | $238.1K | 0.00% | −7,946−5.2% | Reduced |
| Gsa Capital Partners LLP | 130,070 | $215.0K | 0.02% | +87,751+207.4% | Added |
| Citadel Advisors LLC | 126,180 | $208.2K | 0.00% | +115,852+1,121.7% | Added |
| Marshall Wace, LLP | 123,587 | $203.9K | 0.00% | +89,114+258.5% | Added |
| Squarepoint Ops LLC | 110,232 | $181.9K | 0.00% | +55,724+102.2% | Added |
| Jane Street Group, LLC | 107,028 | $176.6K | 0.00% | +92,903+657.7% | Added |
| Jacobs Levy Equity Management, Inc | 88,535 | $146.1K | 0.00% | +88,535 | New |
| Weiss Asset Management LP | 81,630 | $134.7K | 0.01% | +81,630 | New |
| Invesco Ltd. | 78,145 | $128.9K | 0.00% | +3,738+5.0% | Added |
| Rhumbline Advisers | 71,869 | $118.6K | 0.00% | +492+0.7% | Added |
| Barclays PLC | 67,861 | $112.0K | 0.00% | +54,267+399.2% | Added |
| Alliancebernstein L.P. | 65,285 | $107.7K | 0.00% | −5,541−7.8% | Reduced |
| SG Americas Securities, LLC | 48,470 | $80.0K | 0.00% | +35,040+260.9% | Added |
| Susquehanna International Group, LLP | 40,748 | $67.2K | 0.00% | +40,748 | New |
| Engineers Gate Manager LP | 40,121 | $66.2K | 0.00% | +40,121 | New |
| Cornercap Investment Counsel Inc | 38,458 | $63.5K | 0.01% | +777+2.1% | Added |
| State of Wisconsin Investment Board | 36,900 | $60.9K | 0.00% | −74,400−66.8% | Reduced |
| Kestra Private Wealth Services, LLC | 30,500 | $50.3K | 0.00% | +30,500 | New |
| Panagora Asset Management Inc | 29,638 | $48.9K | 0.00% | +29,638 | New |
| Point72 Middle East FZE | 29,338 | $48.4K | 0.00% | +29,338 | New |
| Connor, Clark & Lunn Investment Management Ltd. | 28,517 | $47.1K | 0.00% | +28,517 | New |
| Prudential Financial Inc | 28,375 | $46.8K | 0.00% | +28,375 | New |
| American International Group, Inc. | 22,508 | $37.1K | 0.00% | −92−0.4% | Reduced |
| Royal Bank of Canada | 20,076 | $33.0K | 0.00% | +3,936+24.4% | Added |
| Voya Investment Management LLC | 18,902 | $31.2K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 18,318 | $30.2K | 0.00% | +4,556+33.1% | Added |
| Advisor Group Holdings, Inc. | 17,917 | $29.6K | 0.00% | +7,565+73.1% | Added |
| Envestnet Asset Management Inc | 17,917 | $29.6K | 0.00% | +17,917 | New |
| Cubist Systematic Strategies, LLC | 16,477 | $27.2K | 0.00% | +16,477 | New |
| State Board of Administration of Florida Retirement System | 13,030 | $21.5K | 0.00% | 00.0% | Unchanged |
| Simplex Trading, LLC | 12,816 | $21.0K | 0.00% | +12,361+2,716.7% | Added |
| Tower Research Capital LLC (TRC) | 8,718 | $14.4K | 0.00% | +86+1.0% | Added |
| California State Teachers Retirement System | 7,454 | $12.3K | 0.00% | −2,538−25.4% | Reduced |
| Citigroup Inc | 6,471 | $10.7K | 0.00% | +5,630+669.4% | Added |
| Amalgamated Bank | 3,949 | $7.00K | 0.00% | −454−10.3% | Reduced |
| Legal & General Group Plc | 3,919 | $6.45K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 3,277 | $5.41K | 0.00% | 00.0% | Unchanged |
| New York State Common Retirement Fund | 2,659 | $4.39K | 0.00% | −110−4.0% | Reduced |
| Lazard Asset Management LLC | 3,061 | $4.00K | 0.00% | −187−5.8% | Reduced |
| Qube Research & Technologies Ltd | 386 | $637 | 0.00% | +386 | New |
| Federated Hermes, Inc. | 340 | $561 | 0.00% | +340 | New |
| GAMMA Investing LLC | 79 | $149 | 0.00% | +79 | New |
| First Horizon Advisors, Inc. | 2 | $3 | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 1 | $2 | 0.00% | 00.0% | Unchanged |
| T. Rowe Price Investment Management, Inc. | 0 | $0 | 0.00% | −3,511,456−100.0% | Sold out |
| Yiheng Capital Management, L.P. | 0 | $0 | 0.00% | −1,666,181−100.0% | Sold out |
| Great Point Partners LLC | 0 | $0 | 0.00% | −1,022,537−100.0% | Sold out |
| Sectoral Asset Management Inc | 0 | $0 | 0.00% | −356,740−100.0% | Sold out |
| Vontobel Holding Ltd. | 0 | $0 | 0.00% | −356,740−100.0% | Sold out |
| Wellington Management Group LLP | 0 | $0 | 0.00% | −176,165−100.0% | Sold out |
| Martingale Asset Management L P | 0 | $0 | 0.00% | −74,304−100.0% | Sold out |
| American Century Companies Inc | 0 | $0 | 0.00% | −30,889−100.0% | Sold out |
| SVB Financial Group | 0 | $0 | 0.00% | −25,034−100.0% | Sold out |
| MetLife Investment Management | 0 | $0 | 0.00% | −24,031−100.0% | Sold out |
| Mirae Asset Global Investments Co., Ltd. | 0 | $0 | 0.00% | −19,808−100.0% | Sold out |
| PDT Partners, LLC | 0 | $0 | 0.00% | −19,779−100.0% | Sold out |
| Denali Advisors LLC | 0 | $0 | 0.00% | −10,600−100.0% | Sold out |
| ProShare Advisors LLC | 0 | $0 | 0.00% | −10,192−100.0% | Sold out |
| Manchester Capital Management LLC | 0 | $0 | 0.00% | −3,000−100.0% | Sold out |
| Metropolitan Life Insurance Co | 0 | $0 | 0.00% | −2,660−100.0% | Sold out |
| China Universal Asset Management Co., Ltd. | 0 | $0 | 0.00% | −1,695−100.0% | Sold out |
| Nisa Investment Advisors, LLC | 0 | $0 | 0.00% | −840−100.0% | Sold out |
| Daiwa Securities Group Inc. | 0 | $0 | 0.00% | −194−100.0% | Sold out |