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 2023
Institutional positions in Generation Bio Co. as of Jun 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
- 81
- −5 vs. Q1 2023
- Shares held
- 57.3M
- −86.1K (−0.2%) vs. Q1 2023
- Total value
- $315.1M
- +$68.4M (+27.7%) vs. Q1 2023
- New holders
- 8
- 30 more added
- Sold out
- 13
- 26 more reduced
Compare with Q1 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, Q2 2023
Shares, value and share of portfolio for each institution holding Generation Bio Co.; share changes are against Q1 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 8,622,567 | $47.4M | 0.00% | −327,296−3.7% | Reduced |
| Atlas Venture Life Science Advisors, LLC | 8,279,484 | $45.5M | 5.67% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 7,494,184 | $41.2M | 0.01% | −150,011−2.0% | Reduced |
| Bellevue Group AG | 3,620,280 | $19.9M | 0.28% | 00.0% | Unchanged |
| BlackRock Inc. | 3,536,962 | $19.5M | 0.00% | +90,598+2.6% | Added |
| T. Rowe Price Investment Management, Inc. | 3,511,456 | $19.3M | 0.01% | +130,500+3.9% | Added |
| Artal Group S.A. | 2,814,191 | $15.5M | 0.50% | 00.0% | Unchanged |
| PFM Health Sciences, LP | 2,597,436 | $14.3M | 0.57% | −50,861−1.9% | Reduced |
| Vanguard Group Inc | 2,259,259 | $12.4M | 0.00% | +16,609+0.7% | Added |
| EcoR1 Capital, LLC | 2,046,867 | $11.3M | 0.30% | +90,288+4.6% | Added |
| Yiheng Capital Management, L.P. | 1,601,766 | $8.81M | 0.77% | 00.0% | Unchanged |
| Great Point Partners LLC | 1,022,537 | $5.62M | 1.13% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 1,004,698 | $5.53M | 0.00% | +70,941+7.6% | Added |
| State Street Corp | 908,713 | $5.00M | 0.00% | +11,967+1.3% | Added |
| JPMorgan Chase & Co | 901,317 | $4.96M | 0.00% | +437,463+94.3% | Added |
| Goldman Sachs Group Inc | 720,954 | $3.97M | 0.00% | +31,415+4.6% | Added |
| Dimensional Fund Advisors LP | 644,500 | $3.54M | 0.00% | +99,665+18.3% | Added |
| Bank of America Corp | 530,443 | $2.92M | 0.00% | −12,357−2.3% | Reduced |
| Morgan Stanley | 524,222 | $2.88M | 0.00% | +10,428+2.0% | Added |
| Harvard Management Co Inc | 510,354 | $2.81M | 0.28% | 00.0% | Unchanged |
| UBS Group AG | 401,474 | $2.21M | 0.00% | +14,191+3.7% | Added |
| Charles Schwab Investment Management Inc | 383,524 | $2.11M | 0.00% | +49,979+15.0% | Added |
| Northern Trust Corp | 374,286 | $2.06M | 0.00% | −10,805−2.8% | Reduced |
| Sectoral Asset Management Inc | 356,740 | $1.96M | 0.33% | −28,330−7.4% | Reduced |
| Vontobel Holding Ltd. | 356,740 | $1.96M | 0.02% | −28,330−7.4% | Reduced |
| Renaissance Technologies LLC | 308,100 | $1.70M | 0.00% | +21,100+7.4% | Added |
| Nuveen Asset Management, LLC | 272,324 | $1.50M | 0.00% | −8,298−3.0% | Reduced |
| TD Asset Management Inc | 236,255 | $1.30M | 0.00% | +4,794+2.1% | Added |
| Bank of New York Mellon Corp | 166,401 | $915.2K | 0.00% | +5,038+3.1% | Added |
| Manufacturers Life Insurance Company, The | 152,265 | $837.5K | 0.00% | −449−0.3% | Reduced |
| State of Wisconsin Investment Board | 118,000 | $649.0K | 0.00% | +31,400+36.3% | Added |
| Martingale Asset Management L P | 74,304 | $408.7K | 0.01% | 00.0% | Unchanged |
| Invesco Ltd. | 73,895 | $406.4K | 0.00% | −705−0.9% | Reduced |
| Rhumbline Advisers | 71,428 | $392.9K | 0.00% | −3,484−4.7% | Reduced |
| Alliancebernstein L.P. | 69,816 | $384.0K | 0.00% | +14,010+25.1% | Added |
| Los Angeles Capital Management LLC | 66,372 | $365.0K | 0.00% | +2,200+3.4% | Added |
| Wellington Management Group LLP | 55,974 | $307.9K | 0.00% | +55,974 | New |
| Squarepoint Ops LLC | 49,838 | $274.1K | 0.00% | +49,838 | New |
| Cornercap Investment Counsel Inc | 38,062 | $209.3K | 0.04% | +9,390+32.7% | Added |
| D. E. Shaw & Co., Inc. | 36,239 | $199.3K | 0.00% | −46,280−56.1% | Reduced |
| Marshall Wace, LLP | 34,473 | $189.6K | 0.00% | 00.0% | Unchanged |
| Citadel Advisors LLC | 32,294 | $177.6K | 0.00% | +32,294 | New |
| Millennium Management LLC | 29,193 | $160.6K | 0.00% | −10,125−25.8% | Reduced |
| SVB Financial Group | 27,882 | $153.4K | 0.29% | −12,519−31.0% | Reduced |
| Two Sigma Advisers, LP | 27,500 | $151.3K | 0.00% | +1,800+7.0% | Added |
| MetLife Investment Management | 24,031 | $132.2K | 0.00% | +8,178+51.6% | Added |
| PDT Partners, LLC | 22,187 | $122.0K | 0.02% | −8,483−27.7% | Reduced |
| American International Group, Inc. | 21,796 | $119.9K | 0.00% | −1,413−6.1% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 19,744 | $108.6K | 0.00% | +13+0.1% | Added |
| Wells Fargo & Company | 19,404 | $106.7K | 0.00% | +8,757+82.2% | Added |
| Deutsche Bank AG | 19,200 | $105.6K | 0.00% | −9,977−34.2% | Reduced |
| Voya Investment Management LLC | 18,902 | $104.0K | 0.00% | −1,173−5.8% | Reduced |
| American Century Companies Inc | 17,786 | $97.8K | 0.00% | +7,339+70.2% | Added |
| Barclays PLC | 17,395 | $95.7K | 0.00% | −12,791−42.4% | Reduced |
| XTX Topco Ltd | 16,836 | $92.6K | 0.02% | +16,836 | New |
| California State Teachers Retirement System | 15,064 | $82.9K | 0.00% | −2,815−15.7% | Reduced |
| Citigroup Inc | 14,599 | $80.3K | 0.00% | +13,920+2,050.1% | Added |
| State Board of Administration of Florida Retirement System | 12,860 | $70.7K | 0.00% | +12,860 | New |
| Susquehanna International Group, LLP | 12,810 | $70.5K | 0.00% | −14,064−52.3% | Reduced |
| Royal Bank of Canada | 11,076 | $61.0K | 0.00% | +1,997+22.0% | Added |
| Denali Advisors LLC | 10,600 | $58.3K | 0.02% | 00.0% | Unchanged |
| ProShare Advisors LLC | 10,139 | $55.8K | 0.00% | +10,139 | New |
| Innovis Asset Management LLC | 10,022 | $55.1K | 0.02% | −9,862−49.6% | Reduced |
| Legal & General Group Plc | 4,776 | $26.2K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 4,645 | $25.5K | 0.00% | +4,645 | New |
| Amalgamated Bank | 4,403 | $24.0K | 0.00% | −387−8.1% | Reduced |
| Tower Research Capital LLC (TRC) | 4,069 | $22.4K | 0.00% | +159+4.1% | Added |
| Ameritas Investment Partners, Inc. | 3,277 | $18.0K | 0.00% | 00.0% | Unchanged |
| Manchester Capital Management LLC | 3,000 | $16.5K | 0.00% | 00.0% | Unchanged |
| Lazard Asset Management LLC | 3,084 | $16.0K | 0.00% | +122+4.1% | Added |
| New York State Common Retirement Fund | 2,662 | $14.6K | 0.00% | −40−1.5% | Reduced |
| Metropolitan Life Insurance Co | 2,660 | $14.6K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 2,067 | $11.4K | 0.00% | 00.0% | Unchanged |
| China Universal Asset Management Co., Ltd. | 861 | $4.74K | 0.00% | +53+6.6% | Added |
| Nisa Investment Advisors, LLC | 840 | $4.62K | 0.00% | −3,810−81.9% | Reduced |
| Red Tortoise LLC | 332 | $1.83K | 0.00% | +332 | New |
| Daiwa Securities Group Inc. | 194 | $1.00K | 0.00% | 00.0% | Unchanged |
| Simplex Trading, LLC | 226 | $1.00K | 0.00% | −23−9.2% | Reduced |
| State of Wyoming | 138 | $759 | 0.00% | +41+42.3% | Added |
| First Horizon Advisors, Inc. | 2 | $11 | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 1 | $6 | 0.00% | 00.0% | Unchanged |
| Atika Capital Management LLC | 0 | $0 | 0.00% | −355,000−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −131,146−100.0% | Sold out |
| Jefferies Financial Group Inc. | 0 | $0 | 0.00% | −55,000−100.0% | Sold out |
| Ensign Peak Advisors, Inc | 0 | $0 | 0.00% | −30,640−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −28,075−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −23,540−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −15,268−100.0% | Sold out |
| Ergoteles LLC | 0 | $0 | 0.00% | −15,086−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | 0 | $0 | 0.00% | −13,515−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −12,699−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −10,836−100.0% | Sold out |
| Cannell Capital LLC | 0 | $0 | 0.00% | −7,768−100.0% | Sold out |
| TCI Wealth Advisors, Inc. | 0 | $0 | 0.00% | −100−100.0% | Sold out |