Generation BioGBIO
13F holders, Q3 2024 (September 30)77holders −2
3new positions
7sold out
2famous investors
$2.47avg. 13F price*
At the end of Q3 2024, 77 institutions reported holding Generation Bio Co. (GBIO) in their 13F filings, down 2 from Q2 2024. 3 opened new positions and 7 sold out. The largest holders were T. Rowe Price Associates Inc. ($23.1M), Atlas Venture Life Science Advisors, LLC ($20.5M) and FMR LLC ($13.1M). 2 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Generation Bio Co.
- CUSIP
- 37148K100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2024 → Q3 2024
| Institutions | Total Value | |
|---|---|---|
| New Positions | 3 | $50K |
| Exits | 7 | $8.8M |
All 13F filers, Q2 2024 → Q3 2024: 1,097,234 shares bought and 4,451,292 shares sold, net −3,354,058 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 77 holders
| T. Rowe Price Associates Inc. | 0.00% | Reduce -1.7% | 9,351,590 | $23.1M |
| Atlas Venture Life Science Advisors, LLC | 1.90% | No change | 8,279,484 | $20.5M |
| FMR LLC | 0.00% | Add +0.3% | 5,320,266 | $13.1M |
| Bellevue Group AG | 0.16% | No change | 3,918,856 | $9.7M |
| BlackRock, Inc. | 0.00% | — | 3,415,998 | $8.4M |
| Bank of America Corp. | 0.00% | Add +0.1% | 2,983,092 | $7.4M |
| Siren, L.L.C. | 0.37% | — | 2,982,733 | $7.4M |
| Vanguard Group Inc. | 0.00% | Add +1.8% | 2,635,722 | $6.5M |
| EcoR1 Capital, LLC | 0.17% | No change | 2,046,867 | $5.1M |
| Baker Bros. Advisors LP | 0.05% | Add +61.1% | 1,944,945 | $4.8M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -6.8% | 1,188,203 | $2.9M |
| Geode Capital Management, LLC | 0.00% | Add +0.3% | 1,139,167 | $2.8M |
| Morgan Stanley | 0.00% | Add +6.8% | 999,671 | $2.5M |
| State Street Corp. | 0.00% | Add +1.2% | 992,188 | $2.5M |
| UBS Group AG | 0.00% | Add +1.1% | 846,886 | $2.1M |
| PFM Health Sciences, LP | 0.11% | No change | 787,914 | $1.9M |
| Acadian Asset Management LLC | 0.00% | Add +1.9% | 605,812 | $1.5M |
| Renaissance Technologies | 0.00% | Reduce -6.6% | 594,300 | $1.5M |
| D. E. Shaw & Co. | 0.00% | Add +0.1% | 488,149 | $1.2M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -9.1% | 441,117 | $1.1M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +2.1% | 423,299 | $1.0M |
| Northern Trust Corp. | 0.00% | Add +7.1% | 391,820 | $968K |
| TD Asset Management Inc | 0.00% | No change | 340,686 | $828K |
| Bridgeway Capital Management, LLC | 0.02% | Add +18.3% | 324,000 | $800K |
| Los Angeles Capital Management LLC | 0.00% | Reduce -13.5% | 295,727 | $730K |
| Jacobs Levy Equity Management, Inc. | 0.00% | Reduce -9.2% | 273,445 | $675K |
| Two Sigma Advisers, LP | 0.00% | Reduce -20.2% | 217,100 | $536K |
| Yiheng Capital Management, L.P. | 0.09% | No change | 191,530 | $473K |
| JPMorgan Chase & Co. | 0.00% | Reduce -2.0% | 170,192 | $420K |
| Nuveen Asset Management, LLC | 0.00% | No change | 169,265 | $418K |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -0.4% | 163,978 | $405K |
| Bank of New York Mellon Corp | 0.00% | Reduce -18.9% | 151,387 | $374K |
| Palo Alto Investors LP | 0.05% | No change | 150,475 | $372K |
| Two Sigma Investments, LP | 0.00% | Reduce -34.7% | 149,899 | $370K |
| Panagora Asset Management Inc. | 0.00% | Reduce -0.1% | 87,528 | $216K |
| Barclays PLC | 0.00% | Add +165.5% | 76,430 | $189K |
| Rhumbline Advisers | 0.00% | Reduce -4.2% | 75,619 | $187K |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -3.7% | 73,718 | $182K |
| Alliancebernstein L.P. | 0.00% | No change | 72,155 | $178K |
| Prudential Financial Inc. | 0.00% | No change | 50,975 | $126K |
| Kestra Private Wealth Services, LLC | 0.00% | Add +31.3% | 42,000 | $104K |
| Citigroup Inc. | 0.00% | Add +233.4% | 37,116 | $92K |
| Jane Street Group, LLC | 0.00% | Reduce -29.9% | 34,783 | $86K |
| American Century Companies Inc. | 0.00% | Reduce -1.5% | 31,316 | $77K |
| Cornercap Investment Counsel Inc. | 0.02% | Reduce -49.5% | 28,995 | $72K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +20.7% | 27,493 | $68K |
| Wells Fargo & Company | 0.00% | Add +3.7% | 27,053 | $67K |
| Corebridge Financial, Inc. | 0.00% | Reduce -0.6% | 26,455 | $65K |
| Deutsche Bank AG | 0.00% | Reduce -95.8% | 23,351 | $58K |
| XTX Topco Ltd | 0.00% | Reduce -86.5% | 17,922 | $44K |
| Voya Investment Management LLC | 0.00% | No change | 17,201 | $42K |
| SG Americas Securities, LLC | 0.00% | New | 17,067 | $42K |
| PFG Advisors | 0.00% | No change | 15,000 | $37K |
| Ameriprise Financial Inc. | 0.00% | Reduce -19.7% | 14,274 | $35K |
| Invesco Ltd. | 0.00% | Reduce -7.0% | 12,413 | $31K |
| Royal Bank of Canada | 0.00% | Add +10.9% | 11,835 | $30K |
| Public Employees Retirement System of Ohio | 0.00% | Reduce -33.6% | 5,641 | $14K |
| Russell Investments Group, Ltd. | 0.00% | Add +3.0% | 5,061 | $13K |
| MetLife Investment Management, LLC | 0.00% | Reduce -84.8% | 4,304 | $11K |
| Legal & General Group Plc | 0.00% | No change | 3,919 | $10K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -72.1% | 3,747 | $9K |
| California State Teachers Retirement System | 0.00% | No change | 3,585 | $9K |
| Fortitude Family Office, LLC | 0.00% | New | 3,351 | $8K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 3,277 | $8K |
| New York State Common Retirement Fund | 0.00% | No change | 2,682 | $7K |
| Sterling Capital Management LLC | 0.00% | — | 2,106 | $5K |
| Amalgamated Bank | 0.00% | No change | 1,526 | $4K |
| Osaic Holdings, Inc. | 0.00% | No change | 107 | $264 |
| Nisa Investment Advisors, LLC | 0.00% | Reduce -10.2% | 88 | $217 |
| PNC Financial Services Group, Inc. | 0.00% | No change | 53 | $131 |
| GAMMA Investing LLC | 0.00% | Reduce -36.7% | 50 | $124 |
| Earned Wealth Advisors, LLC | 0.00% | New | 45 | $111 |
| Arax Advisory Partners | 0.00% | No change | 38 | $94 |
| First Horizon Advisors, Inc. | 0.00% | No change | 2 | $5 |
| Huntington National Bank | 0.00% | No change | 1 | $2 |
| Cwm, LLC | 0.00% | Add +76.9% | 46 | $0 |
| Capital Advisors, Ltd. LLC | 0.00% | Reduce -23.7% | 29 | $0 |
"% of holder's portfolio" is GBIO's weight in each manager's 13F, not the share of Generation Bio Co. the manager owns.