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 2021
Institutional positions in Generation Bio Co. as of Sep 30, 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
- 82
- −15 vs. Q2 2021
- Shares held
- 48.0M
- +1.50M (+3.2%) vs. Q2 2021
- Total value
- $1.20B
- −$46.5M (−3.7%) vs. Q2 2021
- New holders
- 8
- 32 more added
- Sold out
- 23
- 27 more reduced
1 institution that held it in Q2 2021 haven't filed for Q3 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2021
Shares, value and share of portfolio for each institution holding Generation Bio Co.; share changes are against Q2 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Price T Rowe Associates Inc | 8,628,216 | $216.3M | 0.02% | +1,265,101+17.2% | Added |
| FMR LLC | 8,517,087 | $213.5M | 0.02% | +22,065+0.3% | Added |
| Vanguard Group Inc | 3,551,075 | $89.0M | 0.00% | +325,749+10.1% | Added |
| Farallon Capital Management, L.L.C. | 3,500,000 | $87.7M | 0.47% | 00.0% | Unchanged |
| BlackRock Inc. | 3,125,139 | $78.3M | 0.00% | +274,999+9.6% | Added |
| Artal Group S.A. | 2,814,191 | $70.6M | 1.74% | 00.0% | Unchanged |
| Bellevue Group AG | 2,472,180 | $62.0M | 0.63% | −6,000−0.2% | Reduced |
| State Street Corp | 1,812,552 | $45.4M | 0.00% | −431,649−19.2% | Reduced |
| JPMorgan Chase & Co | 1,809,978 | $45.4M | 0.01% | +343,886+23.5% | Added |
| Yiheng Capital Management, L.P. | 1,599,774 | $40.1M | 1.97% | +183,291+12.9% | Added |
| Carmignac Gestion | 1,472,624 | $36.9M | 0.46% | −900−0.1% | Reduced |
| Casdin Capital, LLC | 1,324,275 | $33.2M | 0.83% | −286,939−17.8% | Reduced |
| Victory Capital Management Inc | 1,273,547 | $31.9M | 0.03% | +152,567+13.6% | Added |
| Geode Capital Management, LLC | 786,640 | $19.7M | 0.00% | +223,767+39.8% | Added |
| Bank of New York Mellon Corp | 641,857 | $16.1M | 0.00% | +19,784+3.2% | Added |
| Ensign Peak Advisors, Inc | 627,763 | $15.7M | 0.03% | −100,033−13.7% | Reduced |
| Harvard Management Co Inc | 510,354 | $12.8M | 0.75% | −1,995−0.4% | Reduced |
| Marshall Wace North America L.P. | 448,789 | $11.3M | 0.05% | +398,244+787.9% | Added |
| Northern Trust Corp | 435,516 | $10.9M | 0.00% | +30,086+7.4% | Added |
| Goldman Sachs Group Inc | 349,034 | $8.75M | 0.00% | −29,589−7.8% | Reduced |
| Charles Schwab Investment Management Inc | 304,905 | $7.64M | 0.00% | +111,011+57.3% | Added |
| Morgan Stanley | 236,796 | $5.94M | 0.00% | −17,512−6.9% | Reduced |
| TD Asset Management Inc | 189,340 | $4.75M | 0.00% | +11,425+6.4% | Added |
| Deutsche Bank AG | 157,366 | $3.95M | 0.00% | +87+0.1% | Added |
| Nuveen Asset Management, LLC | 144,861 | $3.64M | 0.00% | −14,958−9.4% | Reduced |
| Laurion Capital Management LP | 91,353 | $2.29M | 0.03% | −27,245−23.0% | Reduced |
| Swiss National Bank | 81,400 | $2.04M | 0.00% | +1,600+2.0% | Added |
| Voloridge Investment Management, LLC | 66,606 | $1.67M | 0.01% | −47,678−41.7% | Reduced |
| Penn Mutual Asset Management, LLC | 65,040 | $1.63M | 2.58% | −8,025−11.0% | Reduced |
| Citigroup Inc | 63,826 | $1.60M | 0.00% | −94,966−59.8% | Reduced |
| Rafferty Asset Management, LLC | 60,278 | $1.51M | 0.01% | −27,146−31.1% | Reduced |
| Dimensional Fund Advisors LP | 58,851 | $1.48M | 0.00% | +58,851 | New |
| State of Wisconsin Investment Board | 54,300 | $1.36M | 0.00% | 00.0% | Unchanged |
| California State Teachers Retirement System | 53,775 | $1.35M | 0.00% | −6,632−11.0% | Reduced |
| Alliancebernstein L.P. | 46,006 | $1.15M | 0.00% | 00.0% | Unchanged |
| Rhumbline Advisers | 45,105 | $1.13M | 0.00% | +1,970+4.6% | Added |
| Marshall Wace, LLP | 37,206 | $933.0K | 0.00% | −74,124−66.6% | Reduced |
| Bank of America Corp | 32,694 | $819.0K | 0.00% | +14,286+77.6% | Added |
| Ameriprise Financial Inc | 31,642 | $793.0K | 0.00% | +9,207+41.0% | Added |
| New York State Common Retirement Fund | 31,610 | $792.0K | 0.00% | −7,617−19.4% | Reduced |
| Susquehanna International Group, LLP | 31,329 | $785.0K | 0.00% | −1,195−3.7% | Reduced |
| Simplex Trading, LLC | 23,030 | $631.0K | 0.02% | −1,368−5.6% | Reduced |
| UBS Asset Management Americas Inc | 25,159 | $630.7K | 0.00% | +2,685+11.9% | Added |
| Credit Suisse AG | 24,113 | $605.0K | 0.00% | +1,392+6.1% | Added |
| American International Group, Inc. | 23,981 | $601.0K | 0.00% | −571−2.3% | Reduced |
| Manufacturers Life Insurance Company, The | 22,456 | $563.0K | 0.00% | −1,665−6.9% | Reduced |
| SG Americas Securities, LLC | 22,014 | $552.0K | 0.00% | +22,014 | New |
| Los Angeles Capital Management LLC | 21,312 | $534.0K | 0.00% | −11,130−34.3% | Reduced |
| Invesco Ltd. | 20,761 | $521.0K | 0.00% | +3,067+17.3% | Added |
| Principal Financial Group Inc | 19,681 | $494.0K | 0.00% | +7,096+56.4% | Added |
| ProShare Advisors LLC | 17,744 | $445.0K | 0.00% | −3,798−17.6% | Reduced |
| Voya Investment Management LLC | 17,258 | $433.0K | 0.00% | 00.0% | Unchanged |
| DekaBank Deutsche Girozentrale | 17,100 | $415.0K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 16,522 | $414.0K | 0.00% | +7,095+75.3% | Added |
| MetLife Investment Management | 15,606 | $391.2K | 0.00% | 00.0% | Unchanged |
| Martingale Asset Management L P | 14,323 | $360.0K | 0.00% | +14,323 | New |
| Cubist Systematic Strategies, LLC | 12,883 | $323.0K | 0.00% | +12,883 | New |
| Metropolitan Life Insurance Co | 11,983 | $300.4K | 0.00% | 00.0% | Unchanged |
| Parametric Portfolio Associates LLC | 11,979 | $300.0K | 0.00% | −785−6.2% | Reduced |
| Arizona State Retirement System | 10,027 | $251.0K | 0.00% | +183+1.9% | Added |
| Handelsbanken Fonder AB | 9,500 | $238.0K | 0.00% | 00.0% | Unchanged |
| D. E. Shaw & Co., Inc. | 8,359 | $210.0K | 0.00% | −116,791−93.3% | Reduced |
| State Board of Administration of Florida Retirement System | 8,015 | $201.0K | 0.00% | +60+0.8% | Added |
| Royal Bank of Canada | 5,698 | $143.0K | 0.00% | +1,322+30.2% | Added |
| Tower Research Capital LLC (TRC) | 4,507 | $113.0K | 0.00% | +1,703+60.7% | Added |
| Nisa Investment Advisors, LLC | 3,800 | $95.0K | 0.00% | +3,000+375.0% | Added |
| Tortoise Investment Management, LLC | 3,325 | $83.0K | 0.02% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 3,277 | $82.0K | 0.00% | 00.0% | Unchanged |
| Great West Life Assurance Co | 1,866 | $47.0K | 0.00% | 00.0% | Unchanged |
| Penserra Capital Management LLC | 1,300 | $32.0K | 0.00% | +10+0.8% | Added |
| Compagnie Lombard Odier SCmA | 1,050 | $27.0K | 0.00% | 00.0% | Unchanged |
| Manchester Capital Management LLC | 1,000 | $25.0K | 0.00% | +1,000 | New |
| RPg Family Wealth Advisory, LLC | 758 | $19.0K | 0.01% | 00.0% | Unchanged |
| Wells Fargo & Company | 686 | $17.0K | 0.00% | +500+268.8% | Added |
| Macquarie Group Ltd | 498 | $12.0K | 0.00% | 00.0% | Unchanged |
| Quantbot Technologies LP | 500 | $12.0K | 0.00% | +500 | New |
| Daiwa Securities Group Inc. | 194 | $5.00K | 0.00% | +86+79.6% | Added |
| TCI Wealth Advisors, Inc. | 142 | $4.00K | 0.00% | +142 | New |
| Point72 Hong Kong Ltd | 100 | $3.00K | 0.00% | +100 | New |
| Signaturefd, LLC | 25 | $1.00K | 0.00% | −4−13.8% | Reduced |
| First Horizon Advisors, Inc. | 64 | $1.00K | 0.00% | +34+113.3% | Added |
| Huntington National Bank | 1 | $0 | 0.00% | −208−99.5% | Reduced |
| American Century Companies Inc | 0 | $0 | 0.00% | −246,377−100.0% | Sold out |
| AWM Investment Company, Inc. | 0 | $0 | 0.00% | −225,599−100.0% | Sold out |
| Millennium Management LLC | 0 | $0 | 0.00% | −37,440−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −22,942−100.0% | Sold out |
| Susquehanna Fundamental Investments, LLC | 0 | $0 | 0.00% | −19,500−100.0% | Sold out |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −19,197−100.0% | Sold out |
| UBS Group AG | 0 | $0 | 0.00% | −17,217−100.0% | Sold out |
| Sectoral Asset Management Inc | 0 | $0 | 0.00% | −16,522−100.0% | Sold out |
| Dana Investment Advisors, Inc. | 0 | $0 | 0.00% | −16,098−100.0% | Sold out |
| PDT Partners, LLC | 0 | $0 | 0.00% | −12,644−100.0% | Sold out |
| Thrivent Financial for Lutherans | 0 | $0 | 0.00% | −11,021−100.0% | Sold out |
| Darwin Global Management, Ltd. | 0 | $0 | 0.00% | −10,738−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −10,080−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −8,608−100.0% | Sold out |
| Renaissance Technologies LLC | 0 | $0 | 0.00% | −8,400−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −8,143−100.0% | Sold out |
| Private Advisor Group, LLC | 0 | $0 | 0.00% | −7,661−100.0% | Sold out |
| Wetherby Asset Management Inc | 0 | $0 | 0.00% | −7,594−100.0% | Sold out |