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, Q2 2025
Institutional positions in Generation Bio Co. as of Jun 30, 2025. 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
- 63
- −18 vs. Q1 2025
- Shares held
- 41.5M
- −6.24M (−13.1%) vs. Q1 2025
- Total value
- $13.3M
- −$6.04M (−31.3%) vs. Q1 2025
- New holders
- 15
- 11 more added
- Sold out
- 33
- 25 more reduced
Compare with Q1 2025: 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, Q2 2025
Shares, value and share of portfolio for each institution holding Generation Bio Co.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Price T Rowe Associates Inc | 8,462,611 | $2.71M | 0.00% | −599,228−6.6% | Reduced |
| Atlas Venture Life Science Advisors, LLC | 8,279,484 | $2.65M | 0.40% | 00.0% | Unchanged |
| Siren, L.L.C. | 2,968,925 | $950.4K | 0.05% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 2,580,780 | $826.1K | 0.00% | +700,110+37.2% | Added |
| FMR LLC | 2,345,624 | $750.8K | 0.00% | −2,406,791−50.6% | Reduced |
| Vanguard Group Inc | 2,298,347 | $735.5K | 0.00% | −321,362−12.3% | Reduced |
| Baker Bros. Advisors LP | 1,944,945 | $622.6K | 0.01% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 1,233,471 | $393.0K | 0.00% | +74,336+6.4% | Added |
| BlackRock, Inc. | 1,161,578 | $371.8K | 0.00% | −2,243,600−65.9% | Reduced |
| Goldman Sachs Group Inc | 1,064,090 | $340.6K | 0.00% | −22,008−2.0% | Reduced |
| Millennium Management LLC | 1,061,606 | $339.8K | 0.00% | +1,061,606 | New |
| Yiheng Capital Management, L.P. | 1,055,269 | $337.8K | 0.12% | +863,739+451.0% | Added |
| Morgan Stanley | 912,834 | $292.2K | 0.00% | +33,898+3.9% | Added |
| UBS Group AG | 884,902 | $283.2K | 0.00% | −92,447−9.5% | Reduced |
| Bank of America Corp | 871,951 | $279.0K | 0.00% | −415,235−32.3% | Reduced |
| Militia Capital Partners, LP | 542,347 | $173.6K | 0.08% | +542,347 | New |
| Squarepoint Ops LLC | 518,270 | $165.9K | 0.00% | +78,957+18.0% | Added |
| Geode Capital Management, LLC | 498,080 | $159.5K | 0.00% | −610,342−55.1% | Reduced |
| TD Asset Management Inc | 340,686 | $109.1K | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 249,277 | $79.8K | 0.00% | +157,029+170.2% | Added |
| Charles Schwab Investment Management Inc | 236,856 | $75.8K | 0.00% | −119,585−33.5% | Reduced |
| State Street Corp | 206,116 | $66.0K | 0.00% | −799,626−79.5% | Reduced |
| Citadel Advisors LLC | 192,160 | $61.5K | 0.00% | +70,805+58.3% | Added |
| Two Sigma Advisers, LP | 191,400 | $61.3K | 0.00% | −2,600−1.3% | Reduced |
| Palo Alto Investors LP | 150,475 | $48.2K | 0.01% | 00.0% | Unchanged |
| Y-Intercept (Hong Kong) Ltd | 148,186 | $47.4K | 0.00% | +148,186 | New |
| Manufacturers Life Insurance Company, The | 143,980 | $46.1K | 0.00% | 00.0% | Unchanged |
| Northern Trust Corp | 133,090 | $42.6K | 0.00% | −236,817−64.0% | Reduced |
| Marshall Wace, LLP | 116,201 | $37.2K | 0.00% | +116,201 | New |
| Aegis Wealth Management LLC | 88,890 | $36.0K | 0.02% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 105,961 | $33.9K | 0.00% | +413+0.4% | Added |
| Callan Family Office, LLC | 69,735 | $22.3K | 0.00% | +69,735 | New |
| AQR Capital Management LLC | 63,689 | $20.4K | 0.00% | −25,325−28.5% | Reduced |
| Kestra Private Wealth Services, LLC | 57,000 | $18.2K | 0.00% | +5,000+9.6% | Added |
| Qube Research & Technologies Ltd | 55,588 | $17.8K | 0.00% | +55,588 | New |
| Point72 Asia (Singapore) Pte. Ltd. | 34,970 | $11.2K | 0.00% | +34,970 | New |
| Two Sigma Securities, LLC | 32,669 | $10.5K | 0.00% | +32,669 | New |
| Abel Hall, LLC | 23,565 | $7.54K | 0.00% | +23,565 | New |
| Prudential Financial Inc | 22,100 | $7.07K | 0.00% | −13,475−37.9% | Reduced |
| Tower Research Capital LLC (TRC) | 15,951 | $5.11K | 0.00% | −4,959−23.7% | Reduced |
| Advisor Group Holdings, Inc. | 15,459 | $4.95K | 0.00% | 00.0% | Unchanged |
| PFG Advisors | 15,000 | $4.80K | 0.00% | 00.0% | Unchanged |
| Mariner, LLC | 12,292 | $3.94K | 0.00% | +12,292 | New |
| Barclays PLC | 11,483 | $3.67K | 0.00% | −49,668−81.2% | Reduced |
| Citigroup Inc | 10,359 | $3.32K | 0.00% | −24,428−70.2% | Reduced |
| Jump Financial, LLC | 10,280 | $3.29K | 0.00% | +10,280 | New |
| CWM, LLC | 6,646 | $2.00K | 0.00% | −1,706−20.4% | Reduced |
| JPMorgan Chase & Co | 4,331 | $1.39K | 0.00% | −197,628−97.9% | Reduced |
| Royal Bank of Canada | 3,015 | $1.00K | 0.00% | −2,231−42.5% | Reduced |
| Russell Investments Group, Ltd. | 2,703 | $865 | 0.00% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 1,949 | $624 | 0.00% | −854−30.5% | Reduced |
| BNP Paribas Arbitrage, SA | 1,705 | $546 | 0.00% | −13,212−88.6% | Reduced |
| Wells Fargo & Company | 1,532 | $490 | 0.00% | −28,665−94.9% | Reduced |
| Point72 (DIFC) Ltd | 1,446 | $463 | 0.00% | +1,446 | New |
| Nisa Investment Advisors, LLC | 1,223 | $391 | 0.00% | −454−27.1% | Reduced |
| Raymond James Financial Inc | 600 | $192 | 0.00% | +600 | New |
| SBI Securities Co., Ltd. | 530 | $170 | 0.00% | +60+12.8% | Added |
| EverSource Wealth Advisors, LLC | 391 | $125 | 0.00% | +364+1,348.1% | Added |
| The PNC Financial Services Group, Inc. | 255 | $82 | 0.00% | −1,541−85.8% | Reduced |
| Essential Partners LLC | 130 | $42 | 0.00% | +130 | New |
| First Horizon Advisors, Inc. | 2 | $1 | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 1 | $0 | 0.00% | 00.0% | Unchanged |
| Accent Capital Management, LLC | 38 | – | – | +38 | New |
| Los Angeles Capital Management LLC | 0 | $0 | 0.00% | −378,914−100.0% | Sold out |
| Dimensional Fund Advisors LP | 0 | $0 | 0.00% | −191,830−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −182,005−100.0% | Sold out |
| Jefferies Financial Group Inc. | 0 | $0 | 0.00% | −173,659−100.0% | Sold out |
| Nuveen, LLC | 0 | $0 | 0.00% | −169,265−100.0% | Sold out |
| Bank of New York Mellon Corp | 0 | $0 | 0.00% | −139,783−100.0% | Sold out |
| Deutsche Bank AG | 0 | $0 | 0.00% | −108,771−100.0% | Sold out |
| Ewa, LLC | 0 | $0 | 0.00% | −92,901−100.0% | Sold out |
| Panagora Asset Management Inc | 0 | $0 | 0.00% | −86,373−100.0% | Sold out |
| Integrated Wealth Concepts LLC | 0 | $0 | 0.00% | −72,720−100.0% | Sold out |
| Alliancebernstein L.P. | 0 | $0 | 0.00% | −72,155−100.0% | Sold out |
| Rhumbline Advisers | 0 | $0 | 0.00% | −69,754−100.0% | Sold out |
| Bridgeway Capital Management, LLC | 0 | $0 | 0.00% | −55,200−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −52,440−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −38,723−100.0% | Sold out |
| Intech Investment Management LLC | 0 | $0 | 0.00% | −37,954−100.0% | Sold out |
| Mirae Asset Global ETFs Holdings Ltd. | 0 | $0 | 0.00% | −29,957−100.0% | Sold out |
| Corebridge Financial, Inc. | 0 | $0 | 0.00% | −24,239−100.0% | Sold out |
| Ieq Capital, LLC | 0 | $0 | 0.00% | −20,439−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −18,209−100.0% | Sold out |
| Cerity Partners LLC | 0 | $0 | 0.00% | −16,852−100.0% | Sold out |
| Police & Firemen's Retirement System of New Jersey | 0 | $0 | 0.00% | −15,793−100.0% | Sold out |
| Invesco Ltd. | 0 | $0 | 0.00% | −13,536−100.0% | Sold out |
| CIBC World Markets Corp | 0 | $0 | 0.00% | −10,979−100.0% | Sold out |
| ProShare Advisors LLC | 0 | $0 | 0.00% | −10,711−100.0% | Sold out |
| Legal & General Group Plc | 0 | $0 | 0.00% | −3,919−100.0% | Sold out |
| California State Teachers Retirement System | 0 | $0 | 0.00% | −3,585−100.0% | Sold out |
| Public Employees Retirement System of Ohio | 0 | $0 | 0.00% | −3,534−100.0% | Sold out |
| Ameritas Investment Partners, Inc. | 0 | $0 | 0.00% | −3,277−100.0% | Sold out |
| New York State Common Retirement Fund | 0 | $0 | 0.00% | −2,682−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −1,526−100.0% | Sold out |
| CoreCap Advisors, LLC | 0 | $0 | 0.00% | −946−100.0% | Sold out |
| True Wealth Design, LLC | 0 | $0 | 0.00% | −129−100.0% | Sold out |