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