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 2023
Institutional positions in Generation Bio Co. as of Sep 30, 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
- 77
- −4 vs. Q2 2023
- Shares held
- 57.2M
- −89.7K (−0.2%) vs. Q2 2023
- Total value
- $216.8M
- −$98.3M (−31.2%) vs. Q2 2023
- New holders
- 3
- 25 more added
- Sold out
- 7
- 26 more reduced
Compare with Q2 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, Q3 2023
Shares, value and share of portfolio for each institution holding Generation Bio Co.; share changes are against Q2 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 8,432,773 | $32.0M | 0.00% | −189,794−2.2% | Reduced |
| Atlas Venture Life Science Advisors, LLC | 8,279,484 | $31.4M | 4.86% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 7,454,703 | $28.3M | 0.00% | −39,481−0.5% | Reduced |
| Bellevue Group AG | 3,617,080 | $13.7M | 0.22% | −3,200−0.1% | Reduced |
| T. Rowe Price Investment Management, Inc. | 3,511,456 | $13.3M | 0.01% | 00.0% | Unchanged |
| BlackRock Inc. | 3,353,736 | $12.7M | 0.00% | −183,226−5.2% | Reduced |
| Artal Group S.A. | 2,814,191 | $10.7M | 0.46% | 00.0% | Unchanged |
| PFM Health Sciences, LP | 2,514,443 | $9.53M | 0.46% | −82,993−3.2% | Reduced |
| Vanguard Group Inc | 2,338,784 | $8.86M | 0.00% | +79,525+3.5% | Added |
| EcoR1 Capital, LLC | 2,046,867 | $7.76M | 0.26% | 00.0% | Unchanged |
| Yiheng Capital Management, L.P. | 1,666,181 | $6.31M | 0.57% | +64,415+4.0% | Added |
| JPMorgan Chase & Co | 1,410,446 | $5.35M | 0.00% | +509,129+56.5% | Added |
| Great Point Partners LLC | 1,022,537 | $3.88M | 0.73% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 1,011,770 | $3.84M | 0.00% | +7,072+0.7% | Added |
| State Street Corp | 913,750 | $3.46M | 0.00% | +5,037+0.6% | Added |
| Dimensional Fund Advisors LP | 761,419 | $2.89M | 0.00% | +116,919+18.1% | Added |
| Goldman Sachs Group Inc | 690,469 | $2.62M | 0.00% | −30,485−4.2% | Reduced |
| Bank of America Corp | 507,522 | $1.92M | 0.00% | −22,921−4.3% | Reduced |
| Morgan Stanley | 502,970 | $1.91M | 0.00% | −21,252−4.1% | Reduced |
| TD Asset Management Inc | 406,598 | $1.54M | 0.00% | +170,343+72.1% | Added |
| UBS Group AG | 397,606 | $1.51M | 0.00% | −3,868−1.0% | Reduced |
| Charles Schwab Investment Management Inc | 376,613 | $1.43M | 0.00% | −6,911−1.8% | Reduced |
| Northern Trust Corp | 370,862 | $1.41M | 0.00% | −3,424−0.9% | Reduced |
| Sectoral Asset Management Inc | 356,740 | $1.35M | 0.26% | 00.0% | Unchanged |
| Vontobel Holding Ltd. | 356,740 | $1.35M | 0.01% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 314,800 | $1.19M | 0.00% | +6,700+2.2% | Added |
| Nuveen Asset Management, LLC | 226,372 | $858.0K | 0.00% | −45,952−16.9% | Reduced |
| Wellington Management Group LLP | 176,165 | $667.7K | 0.00% | +120,191+214.7% | Added |
| Bank of New York Mellon Corp | 159,536 | $604.6K | 0.00% | −6,865−4.1% | Reduced |
| Manufacturers Life Insurance Company, The | 152,265 | $577.1K | 0.00% | 00.0% | Unchanged |
| State of Wisconsin Investment Board | 111,300 | $421.8K | 0.00% | −6,700−5.7% | Reduced |
| Invesco Ltd. | 74,407 | $282.0K | 0.00% | +512+0.7% | Added |
| Martingale Asset Management L P | 74,304 | $281.6K | 0.01% | 00.0% | Unchanged |
| Rhumbline Advisers | 71,377 | $270.5K | 0.00% | −51−0.1% | Reduced |
| Alliancebernstein L.P. | 70,826 | $268.4K | 0.00% | +1,010+1.4% | Added |
| Los Angeles Capital Management LLC | 66,372 | $251.6K | 0.00% | 00.0% | Unchanged |
| Squarepoint Ops LLC | 54,508 | $206.6K | 0.00% | +4,670+9.4% | Added |
| Gsa Capital Partners LLP | 42,319 | $160.0K | 0.01% | +42,319 | New |
| Cornercap Investment Counsel Inc | 37,681 | $142.8K | 0.03% | −381−1.0% | Reduced |
| Marshall Wace, LLP | 34,473 | $130.7K | 0.00% | 00.0% | Unchanged |
| American Century Companies Inc | 30,889 | $117.1K | 0.00% | +13,103+73.7% | Added |
| Millennium Management LLC | 30,671 | $116.2K | 0.00% | +1,478+5.1% | Added |
| SVB Financial Group | 25,034 | $94.9K | 0.18% | −2,848−10.2% | Reduced |
| D. E. Shaw & Co., Inc. | 24,986 | $94.7K | 0.00% | −11,253−31.1% | Reduced |
| MetLife Investment Management | 24,031 | $91.1K | 0.00% | 00.0% | Unchanged |
| American International Group, Inc. | 22,600 | $85.7K | 0.00% | +804+3.7% | Added |
| Mirae Asset Global Investments Co., Ltd. | 19,808 | $75.1K | 0.00% | +64+0.3% | Added |
| PDT Partners, LLC | 19,779 | $75.0K | 0.01% | −2,408−10.9% | Reduced |
| Deutsche Bank AG | 19,200 | $72.8K | 0.00% | 00.0% | Unchanged |
| Voya Investment Management LLC | 18,902 | $71.6K | 0.00% | 00.0% | Unchanged |
| Two Sigma Advisers, LP | 17,700 | $67.1K | 0.00% | −9,800−35.6% | Reduced |
| Royal Bank of Canada | 16,140 | $61.0K | 0.00% | +5,064+45.7% | Added |
| Jane Street Group, LLC | 14,125 | $53.5K | 0.00% | +14,125 | New |
| Wells Fargo & Company | 13,762 | $52.2K | 0.00% | −5,642−29.1% | Reduced |
| Barclays PLC | 13,594 | $51.5K | 0.00% | −3,801−21.9% | Reduced |
| SG Americas Securities, LLC | 13,430 | $51.0K | 0.00% | +13,430 | New |
| State Board of Administration of Florida Retirement System | 13,030 | $49.4K | 0.00% | +170+1.3% | Added |
| Denali Advisors LLC | 10,600 | $40.2K | 0.01% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 10,352 | $39.2K | 0.00% | +5,707+122.9% | Added |
| Citadel Advisors LLC | 10,328 | $39.1K | 0.00% | −21,966−68.0% | Reduced |
| ProShare Advisors LLC | 10,192 | $38.6K | 0.00% | +53+0.5% | Added |
| California State Teachers Retirement System | 9,992 | $37.9K | 0.00% | −5,072−33.7% | Reduced |
| Tower Research Capital LLC (TRC) | 8,632 | $32.7K | 0.00% | +4,563+112.1% | Added |
| Amalgamated Bank | 4,403 | $17.0K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 3,919 | $14.9K | 0.00% | −857−17.9% | Reduced |
| Ameritas Investment Partners, Inc. | 3,277 | $12.4K | 0.00% | 00.0% | Unchanged |
| Lazard Asset Management LLC | 3,248 | $12.0K | 0.00% | +164+5.3% | Added |
| Manchester Capital Management LLC | 3,000 | $11.4K | 0.00% | 00.0% | Unchanged |
| New York State Common Retirement Fund | 2,769 | $10.5K | 0.00% | +107+4.0% | Added |
| Metropolitan Life Insurance Co | 2,660 | $10.1K | 0.00% | 00.0% | Unchanged |
| China Universal Asset Management Co., Ltd. | 1,695 | $6.42K | 0.00% | +834+96.9% | Added |
| Citigroup Inc | 841 | $3.19K | 0.00% | −13,758−94.2% | Reduced |
| Nisa Investment Advisors, LLC | 840 | $3.18K | 0.00% | 00.0% | Unchanged |
| Daiwa Securities Group Inc. | 194 | $1.00K | 0.00% | 00.0% | Unchanged |
| Simplex Trading, LLC | 455 | $1.00K | 0.00% | +229+101.3% | Added |
| First Horizon Advisors, Inc. | 2 | $8 | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 1 | $4 | 0.00% | 00.0% | Unchanged |
| Harvard Management Co Inc | 0 | $0 | 0.00% | −510,354−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −16,836−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −12,810−100.0% | Sold out |
| Innovis Asset Management LLC | 0 | $0 | 0.00% | −10,022−100.0% | Sold out |
| Russell Investments Group, Ltd. | 0 | $0 | 0.00% | −2,067−100.0% | Sold out |
| Red Tortoise LLC | 0 | $0 | 0.00% | −332−100.0% | Sold out |
| State of Wyoming | 0 | $0 | 0.00% | −138−100.0% | Sold out |