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 2025
Institutional positions in Generation Bio Co. as of Mar 31, 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
- 81
- +2 vs. Q4 2024
- Shares held
- 47.7M
- −5.98M (−11.1%) vs. Q4 2024
- Total value
- $19.3M
- −$37.6M (−66.0%) vs. Q4 2024
- New holders
- 10
- 15 more added
- Sold out
- 8
- 37 more reduced
1 institution that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2024: 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 2025
Shares, value and share of portfolio for each institution holding Generation Bio Co.; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Price T Rowe Associates Inc | 9,061,839 | $3.67M | 0.00% | −217,220−2.3% | Reduced |
| Atlas Venture Life Science Advisors, LLC | 8,279,484 | $3.35M | 0.64% | 00.0% | Unchanged |
| FMR LLC | 4,752,415 | $1.92M | 0.00% | +126,370+2.7% | Added |
| BlackRock, Inc. | 3,405,178 | $1.38M | 0.00% | −53,887−1.6% | Reduced |
| Siren, L.L.C. | 2,968,925 | $1.20M | 0.07% | −13,808−0.5% | Reduced |
| Vanguard Group Inc | 2,619,709 | $1.06M | 0.00% | −22,287−0.8% | Reduced |
| Baker Bros. Advisors LP | 1,944,945 | $787.7K | 0.01% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 1,880,670 | $761.7K | 0.00% | +917,711+95.3% | Added |
| Bank of America Corp | 1,287,186 | $521.3K | 0.00% | −1,710,553−57.1% | Reduced |
| Acadian Asset Management LLC | 1,159,135 | $468.0K | 0.00% | +407,843+54.3% | Added |
| Geode Capital Management, LLC | 1,108,422 | $449.0K | 0.00% | −28,653−2.5% | Reduced |
| Goldman Sachs Group Inc | 1,086,098 | $439.9K | 0.00% | −122,171−10.1% | Reduced |
| State Street Corp | 1,005,742 | $407.3K | 0.00% | −33,383−3.2% | Reduced |
| UBS Group AG | 977,349 | $395.8K | 0.00% | −76,160−7.2% | Reduced |
| Morgan Stanley | 878,936 | $356.0K | 0.00% | −60,891−6.5% | Reduced |
| Squarepoint Ops LLC | 439,313 | $177.9K | 0.00% | +373,685+569.4% | Added |
| Los Angeles Capital Management LLC | 378,914 | $153.5K | 0.00% | +132,987+54.1% | Added |
| Northern Trust Corp | 369,907 | $149.8K | 0.00% | −33,160−8.2% | Reduced |
| Charles Schwab Investment Management Inc | 356,441 | $144.4K | 0.00% | −10,585−2.9% | Reduced |
| TD Asset Management Inc | 340,686 | $138.0K | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 201,959 | $81.8K | 0.00% | −95,746−32.2% | Reduced |
| Two Sigma Advisers, LP | 194,000 | $78.6K | 0.00% | −400−0.2% | Reduced |
| Dimensional Fund Advisors LP | 191,830 | $77.8K | 0.00% | −204,407−51.6% | Reduced |
| Yiheng Capital Management, L.P. | 191,530 | $77.6K | 0.03% | 00.0% | Unchanged |
| Jacobs Levy Equity Management, Inc | 182,005 | $73.7K | 0.00% | −129,530−41.6% | Reduced |
| Jefferies Financial Group Inc. | 173,659 | $70.3K | 0.00% | −2,088,158−92.3% | Reduced |
| Nuveen, LLC | 169,265 | $68.6K | 0.00% | +169,265 | New |
| Palo Alto Investors LP | 150,475 | $60.9K | 0.01% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 143,980 | $58.3K | 0.00% | −1,114−0.8% | Reduced |
| Bank of New York Mellon Corp | 139,783 | $56.6K | 0.00% | −130−0.1% | Reduced |
| Citadel Advisors LLC | 121,355 | $49.1K | 0.00% | +21,050+21.0% | Added |
| Deutsche Bank AG | 108,771 | $44.6K | 0.00% | −75,402−40.9% | Reduced |
| Two Sigma Investments, LP | 105,548 | $42.7K | 0.00% | −14,855−12.3% | Reduced |
| Ewa, LLC | 92,901 | $37.6K | 0.01% | +92,901 | New |
| Susquehanna International Group, LLP | 92,248 | $37.4K | 0.00% | +69,460+304.8% | Added |
| AQR Capital Management LLC | 89,014 | $36.0K | 0.00% | +89,014 | New |
| Aegis Wealth Management LLC | 88,890 | $36.0K | 0.02% | 00.0% | Unchanged |
| Panagora Asset Management Inc | 86,373 | $35.0K | 0.00% | −1,271−1.5% | Reduced |
| Integrated Wealth Concepts LLC | 72,720 | $29.5K | 0.00% | 00.0% | Unchanged |
| Alliancebernstein L.P. | 72,155 | $29.2K | 0.00% | 00.0% | Unchanged |
| Rhumbline Advisers | 69,754 | $28.2K | 0.00% | −3,691−5.0% | Reduced |
| Barclays PLC | 61,151 | $24.8K | 0.00% | −24,749−28.8% | Reduced |
| Bridgeway Capital Management, LLC | 55,200 | $22.4K | 0.00% | −191,600−77.6% | Reduced |
| XTX Topco Ltd | 52,440 | $21.2K | 0.00% | +52,440 | New |
| Kestra Private Wealth Services, LLC | 52,000 | $21.1K | 0.00% | +52,000 | New |
| Jane Street Group, LLC | 38,723 | $15.7K | 0.00% | +38,723 | New |
| Intech Investment Management LLC | 37,954 | $15.4K | 0.00% | +14,617+62.6% | Added |
| Prudential Financial Inc | 35,575 | $14.4K | 0.00% | −15,400−30.2% | Reduced |
| Citigroup Inc | 34,787 | $14.1K | 0.00% | −6,690−16.1% | Reduced |
| Wells Fargo & Company | 30,197 | $12.2K | 0.00% | −2,644−8.1% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 29,957 | $12.1K | 0.00% | +1,248+4.3% | Added |
| Corebridge Financial, Inc. | 24,239 | $9.82K | 0.00% | −359−1.5% | Reduced |
| Tower Research Capital LLC (TRC) | 20,910 | $8.47K | 0.00% | +10,610+103.0% | Added |
| Ieq Capital, LLC | 20,439 | $8.28K | 0.00% | +20,439 | New |
| SG Americas Securities, LLC | 18,209 | $7.00K | 0.00% | −8,888−32.8% | Reduced |
| Cerity Partners LLC | 16,852 | $6.83K | 0.00% | +16,852 | New |
| Police & Firemen's Retirement System of New Jersey | 15,793 | $6.40K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 15,459 | $6.34K | 0.00% | +15,352+14,347.7% | Added |
| PFG Advisors | 15,000 | $6.08K | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 14,917 | $6.04K | 0.00% | −3,571−19.3% | Reduced |
| Invesco Ltd. | 13,536 | $5.48K | 0.00% | −826−5.8% | Reduced |
| CIBC World Markets Corp | 10,979 | $4.45K | 0.00% | +10,979 | New |
| ProShare Advisors LLC | 10,711 | $4.34K | 0.00% | −3,223−23.1% | Reduced |
| CWM, LLC | 8,352 | $3.00K | 0.00% | +8,049+2,656.4% | Added |
| Royal Bank of Canada | 5,246 | $2.00K | 0.00% | −2,741−34.3% | Reduced |
| Legal & General Group Plc | 3,919 | $1.59K | 0.00% | 00.0% | Unchanged |
| California State Teachers Retirement System | 3,585 | $1.45K | 0.00% | 00.0% | Unchanged |
| Public Employees Retirement System of Ohio | 3,534 | $1.43K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 3,277 | $1.33K | 0.00% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 2,803 | $1.14K | 0.00% | −826−22.8% | Reduced |
| Russell Investments Group, Ltd. | 2,703 | $1.09K | 0.00% | −3,112−53.5% | Reduced |
| New York State Common Retirement Fund | 2,682 | $1.09K | 0.00% | 00.0% | Unchanged |
| Amalgamated Bank | 1,526 | $1.00K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 1,796 | $728 | 0.00% | +1,743+3,288.7% | Added |
| Nisa Investment Advisors, LLC | 1,677 | $679 | 0.00% | +1,375+455.3% | Added |
| CoreCap Advisors, LLC | 946 | $383 | 0.00% | +531+128.0% | Added |
| SBI Securities Co., Ltd. | 470 | $190 | 0.00% | 00.0% | Unchanged |
| True Wealth Design, LLC | 129 | $53 | 0.00% | +129 | New |
| EverSource Wealth Advisors, LLC | 27 | $11 | 0.00% | −48−64.0% | Reduced |
| First Horizon Advisors, Inc. | 2 | $1 | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 1 | $0 | 0.00% | 00.0% | Unchanged |
| EcoR1 Capital, LLC | 0 | $0 | 0.00% | −2,046,867−100.0% | Sold out |
| PFM Health Sciences, LP | 0 | $0 | 0.00% | −787,914−100.0% | Sold out |
| D. E. Shaw & Co., Inc. | 0 | $0 | 0.00% | −344,922−100.0% | Sold out |
| Millennium Management LLC | 0 | $0 | 0.00% | −91,578−100.0% | Sold out |
| Connor, Clark & Lunn Investment Management Ltd. | 0 | $0 | 0.00% | −63,559−100.0% | Sold out |
| Envestnet Asset Management Inc | 0 | $0 | 0.00% | −14,104−100.0% | Sold out |
| Voya Investment Management LLC | 0 | $0 | 0.00% | −11,691−100.0% | Sold out |
| Assetmark, Inc | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Nuveen Asset Management, LLC | – | – | – | – | Not filed |