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, Q4 2021
Institutional positions in Generation Bio Co. as of Dec 31, 2021. 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
- 89
- +8 vs. Q3 2021
- Shares held
- 55.0M
- +7.46M (+15.7%) vs. Q3 2021
- Total value
- $390.3M
- −$801.5M (−67.3%) vs. Q3 2021
- New holders
- 22
- 29 more added
- Sold out
- 14
- 23 more reduced
1 institution that held it in Q3 2021 haven't filed for Q4 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2021: 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, Q4 2021
Shares, value and share of portfolio for each institution holding Generation Bio Co.; share changes are against Q3 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Price T Rowe Associates Inc | 8,647,121 | $61.2M | 0.01% | +18,905+0.2% | Added |
| FMR LLC | 8,536,462 | $60.4M | 0.00% | +19,375+0.2% | Added |
| Atlas Venture Life Science Advisors, LLC | 8,278,876 | $58.6M | 5.38% | +8,278,876 | New |
| Bellevue Group AG | 3,872,180 | $27.4M | 0.28% | +1,400,000+56.6% | Added |
| Vanguard Group Inc | 3,594,461 | $25.4M | 0.00% | +43,386+1.2% | Added |
| Farallon Capital Management, L.L.C. | 3,500,000 | $24.8M | 0.14% | 00.0% | Unchanged |
| BlackRock Inc. | 3,167,656 | $22.4M | 0.00% | +42,517+1.4% | Added |
| Artal Group S.A. | 2,814,191 | $19.9M | 0.59% | 00.0% | Unchanged |
| Yiheng Capital Management, L.P. | 1,975,146 | $14.0M | 0.71% | +375,372+23.5% | Added |
| State Street Corp | 1,947,909 | $13.8M | 0.00% | +135,357+7.5% | Added |
| Casdin Capital, LLC | 1,324,275 | $9.38M | 0.26% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 749,216 | $5.30M | 0.00% | −37,424−4.8% | Reduced |
| Bank of New York Mellon Corp | 608,299 | $4.31M | 0.00% | −33,558−5.2% | Reduced |
| JPMorgan Chase & Co | 562,005 | $3.98M | 0.00% | −1,247,973−68.9% | Reduced |
| Millennium Management LLC | 538,391 | $3.81M | 0.00% | +538,391 | New |
| Harvard Management Co Inc | 510,354 | $3.61M | 0.34% | 00.0% | Unchanged |
| Northern Trust Corp | 420,184 | $2.98M | 0.00% | −15,332−3.5% | Reduced |
| Charles Schwab Investment Management Inc | 318,575 | $2.26M | 0.00% | +13,670+4.5% | Added |
| Nuveen Asset Management, LLC | 134,112 | $1.86M | 0.00% | −10,749−7.4% | Reduced |
| Morgan Stanley | 244,151 | $1.73M | 0.00% | +7,355+3.1% | Added |
| Two Sigma Investments, LP | 242,982 | $1.72M | 0.00% | +242,982 | New |
| TD Asset Management Inc | 237,621 | $1.68M | 0.00% | +48,281+25.5% | Added |
| Renaissance Technologies LLC | 228,900 | $1.62M | 0.00% | +228,900 | New |
| BVF Inc | 189,050 | $1.34M | 0.05% | +189,050 | New |
| Bank of America Corp | 168,245 | $1.19M | 0.00% | +135,551+414.6% | Added |
| D. E. Shaw & Co., Inc. | 160,387 | $1.14M | 0.00% | +152,028+1,818.7% | Added |
| Deutsche Bank AG | 152,356 | $1.08M | 0.00% | −5,010−3.2% | Reduced |
| Dimensional Fund Advisors LP | 132,128 | $935.0K | 0.00% | +73,277+124.5% | Added |
| Rafferty Asset Management, LLC | 114,516 | $811.0K | 0.00% | +54,238+90.0% | Added |
| Citigroup Inc | 112,684 | $798.0K | 0.00% | +48,858+76.5% | Added |
| UBS Group AG | 109,327 | $774.0K | 0.00% | +109,327 | New |
| Victory Capital Management Inc | 96,571 | $683.0K | 0.00% | −1,176,976−92.4% | Reduced |
| Swiss National Bank | 81,400 | $576.0K | 0.00% | 00.0% | Unchanged |
| Two Sigma Advisers, LP | 77,900 | $552.0K | 0.00% | +77,900 | New |
| Goldman Sachs Group Inc | 70,990 | $503.0K | 0.00% | −278,044−79.7% | Reduced |
| HRT Financial LP | 66,553 | $471.0K | 0.00% | +66,553 | New |
| Walleye Capital LLC | 62,139 | $440.0K | 0.01% | +62,139 | New |
| California State Teachers Retirement System | 55,043 | $390.0K | 0.00% | +1,268+2.4% | Added |
| Marshall Wace, LLP | 54,469 | $385.0K | 0.00% | +17,263+46.4% | Added |
| State of Wisconsin Investment Board | 54,300 | $384.0K | 0.00% | 00.0% | Unchanged |
| Alliancebernstein L.P. | 46,006 | $326.0K | 0.00% | 00.0% | Unchanged |
| Rhumbline Advisers | 43,877 | $311.0K | 0.00% | −1,228−2.7% | Reduced |
| Nomura Holdings Inc | 43,534 | $308.0K | 0.00% | +43,534 | New |
| Susquehanna International Group, LLP | 41,053 | $291.0K | 0.00% | +9,724+31.0% | Added |
| Cubist Systematic Strategies, LLC | 38,421 | $272.0K | 0.00% | +25,538+198.2% | Added |
| PDT Partners, LLC | 36,843 | $261.0K | 0.02% | +36,843 | New |
| ExodusPoint Capital Management, LP | 33,265 | $236.0K | 0.00% | +33,265 | New |
| New York State Common Retirement Fund | 31,468 | $223.0K | 0.00% | −142−0.4% | Reduced |
| Citadel Advisors LLC | 28,706 | $203.0K | 0.00% | +28,706 | New |
| Jump Financial, LLC | 28,700 | $203.0K | 0.01% | +28,700 | New |
| Credit Suisse AG | 24,953 | $177.0K | 0.00% | +840+3.5% | Added |
| UBS Asset Management Americas Inc | 24,668 | $174.7K | 0.00% | −491−2.0% | Reduced |
| Manufacturers Life Insurance Company, The | 23,259 | $166.0K | 0.00% | +803+3.6% | Added |
| Qube Research & Technologies Ltd | 23,503 | $166.0K | 0.00% | +23,503 | New |
| American International Group, Inc. | 23,285 | $165.0K | 0.00% | −696−2.9% | Reduced |
| Occudo Quantitative Strategies LP | 21,659 | $153.0K | 0.01% | +21,659 | New |
| Los Angeles Capital Management LLC | 21,269 | $151.0K | 0.00% | −43−0.2% | Reduced |
| Tudor Investment Corp Et Al | 20,610 | $146.0K | 0.00% | +20,610 | New |
| Wells Fargo & Company | 20,113 | $143.0K | 0.00% | +19,427+2,831.9% | Added |
| Invesco Ltd. | 18,950 | $135.0K | 0.00% | −1,811−8.7% | Reduced |
| Martingale Asset Management L P | 17,953 | $128.0K | 0.00% | +3,630+25.3% | Added |
| DekaBank Deutsche Girozentrale | 17,600 | $127.0K | 0.00% | +500+2.9% | Added |
| Gsa Capital Partners LLP | 17,739 | $126.0K | 0.02% | +17,739 | New |
| ProShare Advisors LLC | 17,558 | $124.0K | 0.00% | −186−1.0% | Reduced |
| Legal & General Group Plc | 16,522 | $117.0K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 16,162 | $113.0K | 0.00% | +10,464+183.6% | Added |
| Voya Investment Management LLC | 15,710 | $111.0K | 0.00% | −1,548−9.0% | Reduced |
| Alpine Global Management, LLC | 11,750 | $83.0K | 0.01% | +11,750 | New |
| Graham Capital Management, L.P. | 11,421 | $80.0K | 0.00% | +11,421 | New |
| Parametric Portfolio Associates LLC | 10,280 | $73.0K | 0.00% | −1,699−14.2% | Reduced |
| Metropolitan Life Insurance Co | 10,127 | $71.7K | 0.00% | −1,856−15.5% | Reduced |
| Ensign Peak Advisors, Inc | 7,790 | $55.0K | 0.00% | −619,973−98.8% | Reduced |
| Tower Research Capital LLC (TRC) | 5,358 | $38.0K | 0.00% | +851+18.9% | Added |
| Simplex Trading, LLC | 4,674 | $33.0K | 0.00% | −18,356−79.7% | Reduced |
| MetLife Investment Management | 3,431 | $24.3K | 0.00% | −12,175−78.0% | Reduced |
| Ameritas Investment Partners, Inc. | 3,277 | $23.0K | 0.00% | 00.0% | Unchanged |
| Great West Life Assurance Co | 2,076 | $14.0K | 0.00% | +210+11.3% | Added |
| Signaturefd, LLC | 1,426 | $10.0K | 0.00% | +1,401+5,604.0% | Added |
| Compagnie Lombard Odier SCmA | 1,050 | $7.00K | 0.00% | 00.0% | Unchanged |
| Manchester Capital Management LLC | 1,000 | $7.00K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 800 | $5.00K | 0.00% | −3,000−78.9% | Reduced |
| Point72 Hong Kong Ltd | 656 | $5.00K | 0.00% | +556+556.0% | Added |
| Macquarie Group Ltd | 498 | $4.00K | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 387 | $3.00K | 0.00% | +387 | New |
| Quantbot Technologies LP | 300 | $2.00K | 0.00% | −200−40.0% | Reduced |
| Daiwa Securities Group Inc. | 194 | $1.00K | 0.00% | 00.0% | Unchanged |
| First Horizon Advisors, Inc. | 64 | $0 | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 1 | $0 | 0.00% | 00.0% | Unchanged |
| Covestor Ltd | 19 | $0 | 0.00% | +19 | New |
| Carmignac Gestion | 0 | $0 | 0.00% | −1,472,624−100.0% | Sold out |
| Laurion Capital Management LP | 0 | $0 | 0.00% | −91,353−100.0% | Sold out |
| Voloridge Investment Management, LLC | 0 | $0 | 0.00% | −66,606−100.0% | Sold out |
| Penn Mutual Asset Management, LLC | 0 | $0 | 0.00% | −65,040−100.0% | Sold out |
| Ameriprise Financial Inc | 0 | $0 | 0.00% | −31,642−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −22,014−100.0% | Sold out |
| Principal Financial Group Inc | 0 | $0 | 0.00% | −19,681−100.0% | Sold out |
| Arizona State Retirement System | 0 | $0 | 0.00% | −10,027−100.0% | Sold out |
| Handelsbanken Fonder AB | 0 | $0 | 0.00% | −9,500−100.0% | Sold out |
| State Board of Administration of Florida Retirement System | 0 | $0 | 0.00% | −8,015−100.0% | Sold out |
| Tortoise Investment Management, LLC | 0 | $0 | 0.00% | −3,325−100.0% | Sold out |