Generation BioGBIO
13F holders, Q4 2024 (December 31)80holders +3
13new positions
13sold out
4famous investors
$1.06avg. 13F price*
At the end of Q4 2024, 80 institutions reported holding Generation Bio Co. (GBIO) in their 13F filings, up 3 from Q3 2024. 13 opened new positions and 13 sold out. The largest holders were T. Rowe Price Associates Inc. ($9.8M), Atlas Venture Life Science Advisors, LLC ($8.8M) and FMR LLC ($4.9M). 4 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Generation Bio Co.
- CUSIP
- 37148K100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2024 → Q4 2024
| Institutions | Total Value | |
|---|---|---|
| New Positions | 13 | $2.8M |
| Exits | 13 | $10.1M |
All 13F filers, Q3 2024 → Q4 2024: 3,916,945 shares bought and 5,404,240 shares sold, net −1,487,295 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 80 holders
| T. Rowe Price Associates Inc. | 0.00% | Reduce -0.8% | 9,279,059 | $9.8M |
| Atlas Venture Life Science Advisors, LLC | 1.07% | No change | 8,279,484 | $8.8M |
| FMR LLC | 0.00% | Reduce -13.1% | 4,626,045 | $4.9M |
| BlackRock, Inc. | 0.00% | Add +1.3% | 3,459,065 | $3.7M |
| Bank of America Corp. | 0.00% | Add +0.5% | 2,997,739 | $3.2M |
| Siren, L.L.C. | 0.14% | No change | 2,982,733 | $3.2M |
| Vanguard Group Inc. | 0.00% | Add +0.2% | 2,641,996 | $2.8M |
| Jefferies Financial Group Inc. | 0.03% | New | 2,261,817 | $2.4M |
| EcoR1 Capital, LLC | 0.09% | No change | 2,046,867 | $2.2M |
| Baker Bros. Advisors LP | 0.02% | No change | 1,944,945 | $2.1M |
| Goldman Sachs Group Inc. | 0.00% | Add +1.7% | 1,208,269 | $1.3M |
| Geode Capital Management, LLC | 0.00% | Reduce -0.2% | 1,137,075 | $1.2M |
| UBS Group AG | 0.00% | Add +24.4% | 1,053,509 | $1.1M |
| State Street Corp. | 0.00% | Add +4.7% | 1,039,125 | $1.1M |
| Renaissance Technologies | 0.00% | Add +62.0% | 962,959 | $1.0M |
| Morgan Stanley | 0.00% | Reduce -6.0% | 939,827 | $996K |
| PFM Health Sciences, LP | 0.07% | No change | 787,914 | $835K |
| Acadian Asset Management LLC | 0.00% | Add +24.0% | 751,292 | $795K |
| Northern Trust Corp. | 0.00% | Add +2.9% | 403,067 | $427K |
| Dimensional Fund Advisors LP | 0.00% | Reduce -10.2% | 396,237 | $420K |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -13.3% | 367,026 | $389K |
| D. E. Shaw & Co. | 0.00% | Reduce -29.3% | 344,922 | $366K |
| TD Asset Management Inc | 0.00% | No change | 340,686 | $361K |
| Jacobs Levy Equity Management, Inc. | 0.00% | Add +13.9% | 311,535 | $330K |
| JPMorgan Chase & Co. | 0.00% | Add +74.9% | 297,705 | $316K |
| Bridgeway Capital Management, LLC | 0.01% | Reduce -23.8% | 246,800 | $262K |
| Los Angeles Capital Management LLC | 0.00% | Reduce -16.8% | 245,927 | $261K |
| Two Sigma Advisers, LP | 0.00% | Reduce -10.5% | 194,400 | $206K |
| Yiheng Capital Management, L.P. | 0.04% | No change | 191,530 | $203K |
| Deutsche Bank AG | 0.00% | Add +688.7% | 184,173 | $195K |
| Nuveen Asset Management, LLC | 0.00% | No change | 169,265 | $179K |
| Palo Alto Investors LP | 0.02% | No change | 150,475 | $160K |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -11.5% | 145,094 | $154K |
| Bank of New York Mellon Corp | 0.00% | Reduce -7.6% | 139,913 | $148K |
| Two Sigma Investments, LP | 0.00% | Reduce -19.7% | 120,403 | $128K |
| Citadel Advisors | 0.00% | New | 100,305 | $106K |
| Millennium Management | 0.00% | New | 91,578 | $97K |
| Aegis Wealth Management LLC | 0.06% | — | 88,890 | $94K |
| Panagora Asset Management Inc. | 0.00% | Add +0.1% | 87,644 | $93K |
| Barclays PLC | 0.00% | Add +12.4% | 85,900 | $91K |
| Rhumbline Advisers | 0.00% | Reduce -2.9% | 73,445 | $78K |
| Integrated Wealth Concepts LLC | 0.00% | New | 72,720 | $77K |
| Alliancebernstein L.P. | 0.00% | No change | 72,155 | $76K |
| Squarepoint Ops LLC | 0.00% | New | 65,628 | $70K |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -13.8% | 63,559 | $67K |
| Prudential Financial Inc. | 0.00% | No change | 50,975 | $54K |
| Citigroup Inc. | 0.00% | Add +11.8% | 41,477 | $44K |
| Wells Fargo & Company | 0.00% | Add +21.4% | 32,841 | $35K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +4.4% | 28,709 | $30K |
| SG Americas Securities, LLC | 0.00% | Add +58.8% | 27,097 | $29K |
| Corebridge Financial, Inc. | 0.00% | Reduce -7.0% | 24,598 | $26K |
| Intech Investment Management LLC | 0.00% | New | 23,337 | $25K |
| Susquehanna International Group, LLP | 0.00% | New | 22,788 | $24K |
| BNP Paribas Financial Markets | 0.00% | New | 18,488 | $20K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | — | 15,793 | $17K |
| PFG Advisors | 0.00% | No change | 15,000 | $16K |
| Invesco Ltd. | 0.00% | Add +15.7% | 14,362 | $15K |
| Envestnet Asset Management Inc. | 0.00% | New | 14,104 | $15K |
| ProShare Advisors LLC | 0.00% | New | 13,934 | $15K |
| Voya Investment Management LLC | 0.00% | Reduce -32.0% | 11,691 | $12K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +174.9% | 10,300 | $11K |
| Royal Bank of Canada | 0.00% | Reduce -32.5% | 7,987 | $9K |
| Russell Investments Group, Ltd. | 0.00% | Add +14.9% | 5,815 | $6K |
| Legal & General Group Plc | 0.00% | No change | 3,919 | $4K |
| Sterling Capital Management LLC | 0.00% | Add +72.3% | 3,629 | $4K |
| California State Teachers Retirement System | 0.00% | No change | 3,585 | $4K |
| Public Employees Retirement System of Ohio | 0.00% | Reduce -37.4% | 3,534 | $4K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 3,277 | $3K |
| New York State Common Retirement Fund | 0.00% | No change | 2,682 | $3K |
| Amalgamated Bank | 0.00% | No change | 1,526 | $2K |
| SBI Securities Co., Ltd. | 0.00% | — | 470 | $498 |
| CoreCap Advisors, LLC | 0.00% | New | 415 | $440 |
| Nisa Investment Advisors, LLC | 0.00% | Add +243.2% | 302 | $320 |
| Osaic Holdings, Inc. | 0.00% | No change | 107 | $113 |
| Assetmark, Inc. | 0.00% | New | 100 | $106 |
| EverSource Wealth Advisors, LLC | 0.00% | New | 75 | $80 |
| PNC Financial Services Group, Inc. | 0.00% | No change | 53 | $56 |
| First Horizon Advisors, Inc. | 0.00% | No change | 2 | $2 |
| Huntington National Bank | 0.00% | No change | 1 | $1 |
| Cwm, LLC | 0.00% | Add +558.7% | 303 | $0 |
"% of holder's portfolio" is GBIO's weight in each manager's 13F, not the share of Generation Bio Co. the manager owns.