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, Q1 2023
Institutional positions in Generation Bio Co. as of Mar 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
- 86
- −12 vs. Q4 2022
- Shares held
- 57.4M
- +242.5K (+0.4%) vs. Q4 2022
- Total value
- $246.8M
- +$22.2M (+9.9%) vs. Q4 2022
- New holders
- 11
- 27 more added
- Sold out
- 23
- 31 more reduced
Compare with Q4 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, Q1 2023
Shares, value and share of portfolio for each institution holding Generation Bio Co.; share changes are against Q4 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 8,949,863 | $38.5M | 0.00% | +36,532+0.4% | Added |
| Atlas Venture Life Science Advisors, LLC | 8,279,484 | $35.6M | 4.82% | +6080.0% | Added |
| Price T Rowe Associates Inc | 7,644,195 | $32.9M | 0.00% | +383,149+5.3% | Added |
| Bellevue Group AG | 3,620,280 | $15.6M | 0.23% | −7,000−0.2% | Reduced |
| BlackRock Inc. | 3,446,364 | $14.8M | 0.00% | −261,703−7.1% | Reduced |
| T. Rowe Price Investment Management, Inc. | 3,380,956 | $14.5M | 0.01% | −196,799−5.5% | Reduced |
| Artal Group S.A. | 2,814,191 | $12.1M | 0.72% | 00.0% | Unchanged |
| PFM Health Sciences, LP | 2,648,297 | $11.4M | 0.52% | −254,895−8.8% | Reduced |
| Vanguard Group Inc | 2,242,650 | $9.64M | 0.00% | +11,151+0.5% | Added |
| EcoR1 Capital, LLC | 1,956,579 | $8.41M | 0.27% | +1,956,579 | New |
| Yiheng Capital Management, L.P. | 1,601,766 | $6.89M | 0.54% | +415,471+35.0% | Added |
| Great Point Partners LLC | 1,022,537 | $4.40M | 0.87% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 933,757 | $4.02M | 0.00% | +65,257+7.5% | Added |
| State Street Corp | 896,746 | $3.86M | 0.00% | −28,054−3.0% | Reduced |
| Goldman Sachs Group Inc | 689,539 | $2.97M | 0.00% | −112,456−14.0% | Reduced |
| Dimensional Fund Advisors LP | 544,835 | $2.34M | 0.00% | +92,375+20.4% | Added |
| Bank of America Corp | 542,800 | $2.33M | 0.00% | −322,462−37.3% | Reduced |
| Morgan Stanley | 513,794 | $2.21M | 0.00% | +21,818+4.4% | Added |
| Harvard Management Co Inc | 510,354 | $2.19M | 0.23% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 463,854 | $1.99M | 0.00% | +2,714+0.6% | Added |
| UBS Group AG | 387,283 | $1.67M | 0.00% | +7,818+2.1% | Added |
| Northern Trust Corp | 385,091 | $1.66M | 0.00% | −40,055−9.4% | Reduced |
| Sectoral Asset Management Inc | 385,070 | $1.66M | 0.32% | +111,283+40.6% | Added |
| Vontobel Holding Ltd. | 385,070 | $1.66M | 0.02% | +111,283+40.6% | Added |
| Atika Capital Management LLC | 355,000 | $1.53M | 0.24% | +355,000 | New |
| Charles Schwab Investment Management Inc | 333,545 | $1.43M | 0.00% | −12,762−3.7% | Reduced |
| Renaissance Technologies LLC | 287,000 | $1.23M | 0.00% | +35,000+13.9% | Added |
| Nuveen Asset Management, LLC | 280,622 | $1.21M | 0.00% | −61,439−18.0% | Reduced |
| TD Asset Management Inc | 231,461 | $995.3K | 0.00% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 161,363 | $693.9K | 0.00% | −2,566−1.6% | Reduced |
| Manufacturers Life Insurance Company, The | 152,714 | $656.7K | 0.00% | 00.0% | Unchanged |
| Gsa Capital Partners LLP | 131,146 | $564.0K | 0.06% | +44,992+52.2% | Added |
| State of Wisconsin Investment Board | 86,600 | $372.4K | 0.00% | −36,328−29.6% | Reduced |
| D. E. Shaw & Co., Inc. | 82,519 | $354.8K | 0.00% | −144,329−63.6% | Reduced |
| Rhumbline Advisers | 74,912 | $322.0K | 0.00% | +581+0.8% | Added |
| Invesco Ltd. | 74,600 | $320.8K | 0.00% | +57,917+347.2% | Added |
| Martingale Asset Management L P | 74,304 | $319.5K | 0.01% | 00.0% | Unchanged |
| Los Angeles Capital Management LLC | 64,172 | $275.9K | 0.00% | −1,160−1.8% | Reduced |
| Alliancebernstein L.P. | 55,806 | $240.0K | 0.00% | −1,100−1.9% | Reduced |
| Jefferies Financial Group Inc. | 55,000 | $236.5K | 0.00% | +55,000 | New |
| SVB Financial Group | 40,401 | $173.7K | 0.33% | −12,519−23.7% | Reduced |
| Millennium Management LLC | 39,318 | $169.0K | 0.00% | +13,400+51.7% | Added |
| Marshall Wace, LLP | 34,473 | $148.2K | 0.00% | 00.0% | Unchanged |
| PDT Partners, LLC | 30,670 | $131.9K | 0.02% | +16,110+110.6% | Added |
| Ensign Peak Advisors, Inc | 30,640 | $131.8K | 0.00% | +15,400+101.0% | Added |
| Barclays PLC | 30,186 | $129.8K | 0.00% | +17,273+133.8% | Added |
| Deutsche Bank AG | 29,177 | $125.5K | 0.00% | −121,107−80.6% | Reduced |
| Cornercap Investment Counsel Inc | 28,672 | $123.3K | 0.02% | +153+0.5% | Added |
| Tudor Investment Corp Et Al | 28,075 | $121.0K | 0.00% | +28,075 | New |
| Susquehanna International Group, LLP | 26,874 | $115.6K | 0.00% | +26,874 | New |
| Two Sigma Advisers, LP | 25,700 | $110.5K | 0.00% | +900+3.6% | Added |
| Jane Street Group, LLC | 23,540 | $101.2K | 0.00% | +23,540 | New |
| American International Group, Inc. | 23,209 | $99.8K | 0.00% | +462+2.0% | Added |
| Voya Investment Management LLC | 20,075 | $86.3K | 0.00% | 00.0% | Unchanged |
| Innovis Asset Management LLC | 19,884 | $85.5K | 0.03% | −188−0.9% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 19,731 | $84.8K | 0.00% | −32−0.2% | Reduced |
| California State Teachers Retirement System | 17,879 | $76.9K | 0.00% | −39,738−69.0% | Reduced |
| MetLife Investment Management | 15,853 | $68.2K | 0.00% | −10,464−39.8% | Reduced |
| Jacobs Levy Equity Management, Inc | 15,268 | $65.7K | 0.00% | −66,902−81.4% | Reduced |
| Ergoteles LLC | 15,086 | $64.9K | 0.00% | +15,086 | New |
| Cubist Systematic Strategies, LLC | 13,515 | $58.1K | 0.00% | +13,515 | New |
| SG Americas Securities, LLC | 12,699 | $55.0K | 0.00% | −4,353−25.5% | Reduced |
| American Century Companies Inc | 10,447 | $48.8K | 0.00% | +10,447 | New |
| Y-Intercept (Hong Kong) Ltd | 10,836 | $46.6K | 0.01% | +10,836 | New |
| Wells Fargo & Company | 10,647 | $45.8K | 0.00% | +8,547+407.0% | Added |
| Denali Advisors LLC | 10,600 | $45.6K | 0.02% | 00.0% | Unchanged |
| Royal Bank of Canada | 9,079 | $40.0K | 0.00% | −3,796−29.5% | Reduced |
| Cannell Capital LLC | 7,768 | $33.4K | 0.01% | 00.0% | Unchanged |
| Amalgamated Bank | 4,790 | $21.0K | 0.00% | −1,174−19.7% | Reduced |
| Legal & General Group Plc | 4,776 | $20.5K | 0.00% | −15,671−76.6% | Reduced |
| Nisa Investment Advisors, LLC | 4,650 | $20.0K | 0.00% | −42,050−90.0% | Reduced |
| Tower Research Capital LLC (TRC) | 3,910 | $17.0K | 0.00% | +612+18.6% | Added |
| Ameritas Investment Partners, Inc. | 3,277 | $14.1K | 0.00% | 00.0% | Unchanged |
| Manchester Capital Management LLC | 3,000 | $12.9K | 0.00% | 00.0% | Unchanged |
| Lazard Asset Management LLC | 2,962 | $12.0K | 0.00% | +589+24.8% | Added |
| New York State Common Retirement Fund | 2,702 | $11.6K | 0.00% | −23,335−89.6% | Reduced |
| Metropolitan Life Insurance Co | 2,660 | $11.4K | 0.00% | −407−13.3% | Reduced |
| Russell Investments Group, Ltd. | 2,067 | $8.89K | 0.00% | 00.0% | Unchanged |
| China Universal Asset Management Co., Ltd. | 808 | $3.47K | 0.00% | +204+33.8% | Added |
| Citigroup Inc | 679 | $2.92K | 0.00% | −1,516−69.1% | Reduced |
| Daiwa Securities Group Inc. | 194 | $1.00K | 0.00% | 00.0% | Unchanged |
| Simplex Trading, LLC | 249 | $1.00K | 0.00% | +249 | New |
| TCI Wealth Advisors, Inc. | 100 | $430 | 0.00% | 00.0% | Unchanged |
| State of Wyoming | 97 | $417 | 0.00% | −4−4.0% | Reduced |
| First Horizon Advisors, Inc. | 2 | $9 | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 1 | $4 | 0.00% | 00.0% | Unchanged |
| Farallon Capital Management, L.L.C. | 0 | $0 | 0.00% | −1,249,382−100.0% | Sold out |
| HighVista Strategies LLC | 0 | $0 | 0.00% | −138,880−100.0% | Sold out |
| Swiss National Bank | 0 | $0 | 0.00% | −106,800−100.0% | Sold out |
| BVF Inc | 0 | $0 | 0.00% | −102,900−100.0% | Sold out |
| Panagora Asset Management Inc | 0 | $0 | 0.00% | −58,613−100.0% | Sold out |
| Cheyne Capital Management (UK) LLP | 0 | $0 | 0.00% | −51,126−100.0% | Sold out |
| Credit Suisse AG | 0 | $0 | 0.00% | −30,495−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −24,883−100.0% | Sold out |
| UBS Asset Management Americas Inc | 0 | $0 | 0.00% | −24,668−100.0% | Sold out |
| Virginia Retirement Systems Et Al | 0 | $0 | 0.00% | −16,500−100.0% | Sold out |
| Ameriprise Financial Inc | 0 | $0 | 0.00% | −13,620−100.0% | Sold out |
| Teacher Retirement System of Texas | 0 | $0 | 0.00% | −13,267−100.0% | Sold out |
| Arizona State Retirement System | 0 | $0 | 0.00% | −12,488−100.0% | Sold out |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −11,294−100.0% | Sold out |