Generation BioGBIO
13F holders, Q2 2024 (June 30)79holders +2
9new positions
9sold out
4famous investors
$2.82avg. 13F price*
At the end of Q2 2024, 79 institutions reported holding Generation Bio Co. (GBIO) in their 13F filings, up 2 from Q1 2024. 9 opened new positions and 9 sold out. The largest holders were T. Rowe Price Associates Inc. ($26.8M), Atlas Venture Life Science Advisors, LLC ($23.3M) and FMR LLC ($15.0M). 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 Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Generation Bio Co.
- CUSIP
- 37148K100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2024 → Q2 2024
| Institutions | Total Value | |
|---|---|---|
| New Positions | 9 | $881K |
| Exits | 9 | $747K |
All 13F filers, Q1 2024 → Q2 2024: 2,865,214 shares bought and 2,381,350 shares sold, net +483,864 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 79 holders
| T. Rowe Price Associates Inc. | 0.00% | Add +7.2% | 9,513,626 | $26.8M |
| Atlas Venture Life Science Advisors, LLC | 2.46% | No change | 8,279,484 | $23.3M |
| FMR LLC | 0.00% | Reduce -0.6% | 5,304,610 | $15.0M |
| Bellevue Group AG | 0.18% | Add +1.5% | 3,918,856 | $11.1M |
| BlackRock Inc. | 0.00% | Add +8.1% | 3,294,247 | $9.3M |
| Bank of America Corp. | 0.00% | Reduce -0.3% | 2,981,448 | $8.4M |
| Artal Group S.A. | 0.20% | No change | 2,830,591 | $8.0M |
| Vanguard Group Inc. | 0.00% | Add +0.7% | 2,588,572 | $7.3M |
| EcoR1 Capital, LLC | 0.18% | No change | 2,046,867 | $5.8M |
| Goldman Sachs Group Inc. | 0.00% | Add +2.6% | 1,275,016 | $3.6M |
| Baker Bros. Advisors LP | 0.04% | Add +225.1% | 1,206,957 | $3.4M |
| Geode Capital Management, LLC | 0.00% | Add +6.1% | 1,135,914 | $3.2M |
| State Street Corp. | 0.00% | Add +1.6% | 980,519 | $2.8M |
| Morgan Stanley | 0.00% | Reduce -0.6% | 936,396 | $2.6M |
| UBS Group AG | 0.00% | Reduce -3.5% | 837,848 | $2.4M |
| PFM Health Sciences, LP | 0.12% | Reduce -51.4% | 787,914 | $2.2M |
| Renaissance Technologies | 0.00% | Reduce -4.2% | 636,400 | $1.8M |
| Acadian Asset Management LLC | 0.01% | Add +23.9% | 594,569 | $1.7M |
| Deutsche Bank AG | 0.00% | Reduce -55.4% | 557,996 | $1.6M |
| D. E. Shaw & Co. | 0.00% | Add +9.9% | 487,540 | $1.4M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -3.7% | 485,396 | $1.4M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +6.5% | 414,607 | $1.2M |
| Northern Trust Corp. | 0.00% | Reduce -4.5% | 365,912 | $1.0M |
| Los Angeles Capital Management LLC | 0.00% | Reduce -10.4% | 341,861 | $964K |
| TD Asset Management Inc | 0.00% | No change | 340,686 | $961K |
| Jacobs Levy Equity Management, Inc. | 0.00% | Add +830.5% | 301,053 | $849K |
| Bridgeway Capital Management, LLC | 0.02% | Add +13.4% | 274,000 | $773K |
| Two Sigma Advisers, LP | 0.00% | Reduce -18.5% | 272,000 | $767K |
| Two Sigma Investments, LP | 0.00% | Reduce -27.0% | 229,419 | $647K |
| Yiheng Capital Management, L.P. | 0.08% | No change | 191,530 | $540K |
| Bank of New York Mellon Corp | 0.00% | Add +31.2% | 186,756 | $527K |
| JPMorgan Chase & Co. | 0.00% | Reduce -35.2% | 173,694 | $490K |
| Nuveen Asset Management, LLC | 0.00% | No change | 169,265 | $477K |
| Manufacturers Life Insurance Company, The | 0.00% | Add +8.7% | 164,573 | $464K |
| Palo Alto Investors LP | 0.05% | New | 150,475 | $424K |
| XTX Topco Ltd | 0.03% | Reduce -20.1% | 132,716 | $374K |
| Wellington Management Group LLP | 0.00% | New | 119,356 | $337K |
| Millennium Management | 0.00% | Reduce -56.0% | 97,948 | $276K |
| Panagora Asset Management Inc. | 0.00% | Reduce -0.4% | 87,620 | $247K |
| Rhumbline Advisers | 0.00% | Add +7.4% | 78,903 | $222K |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -15.7% | 76,558 | $216K |
| Alliancebernstein L.P. | 0.00% | Add +10.5% | 72,155 | $203K |
| Cornercap Investment Counsel Inc. | 0.03% | Reduce -22.6% | 57,424 | $162K |
| Prudential Financial Inc. | 0.00% | Add +23.8% | 50,975 | $144K |
| Jane Street Group, LLC | 0.00% | Add +74.6% | 49,618 | $140K |
| Citadel Advisors | 0.00% | Reduce -14.1% | 49,475 | $140K |
| Kestra Private Wealth Services, LLC | 0.00% | Reduce -38.8% | 32,000 | $90K |
| American Century Companies Inc. | 0.00% | Add +199.3% | 31,786 | $90K |
| Barclays PLC | 0.00% | Reduce -23.0% | 28,791 | $81K |
| MetLife Investment Management, LLC | 0.00% | Add +16.6% | 28,396 | $80K |
| Corebridge Financial, Inc. | 0.00% | — | 26,619 | $75K |
| Wells Fargo & Company | 0.00% | Add +28.0% | 26,077 | $74K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | — | 22,778 | $64K |
| Cubist Systematic Strategies, LLC | 0.00% | Add +91.0% | 19,046 | $54K |
| Ameriprise Financial Inc. | 0.00% | New | 17,774 | $50K |
| Voya Investment Management LLC | 0.00% | Add +5.8% | 17,201 | $49K |
| PFG Advisors | 0.00% | Add +50.0% | 15,000 | $42K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +193.3% | 13,447 | $38K |
| Invesco Ltd. | 0.00% | Reduce -13.4% | 13,352 | $38K |
| Sherbrooke Park Advisers LLC | 0.01% | New | 11,157 | $31K |
| Citigroup Inc. | 0.00% | Add +30.8% | 11,134 | $31K |
| Royal Bank of Canada | 0.00% | Add +51.7% | 10,670 | $30K |
| Public Employees Retirement System of Ohio | 0.00% | New | 8,500 | $24K |
| Russell Investments Group, Ltd. | 0.00% | New | 4,912 | $14K |
| Legal & General Group Plc | 0.00% | No change | 3,919 | $11K |
| California State Teachers Retirement System | 0.00% | Reduce -21.3% | 3,585 | $10K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 3,277 | $9K |
| New York State Common Retirement Fund | 0.00% | Add +0.9% | 2,682 | $8K |
| Amalgamated Bank | 0.00% | No change | 1,526 | $4K |
| Osaic Holdings, Inc. | 0.00% | New | 107 | $302 |
| Nisa Investment Advisors, LLC | 0.00% | Add +553.3% | 98 | $276 |
| GAMMA Investing LLC | 0.00% | No change | 79 | $223 |
| PNC Financial Services Group, Inc. | 0.00% | New | 53 | $149 |
| Arax Advisory Partners | 0.00% | New | 38 | $108 |
| First Horizon Advisors, Inc. | 0.00% | No change | 2 | $6 |
| Huntington National Bank | 0.00% | No change | 1 | $3 |
| Simplex Trading, LLC | 0.00% | Reduce -99.3% | 172 | $0 |
| Cwm, LLC | 0.00% | Add +1200.0% | 26 | $0 |
| Capital Advisors, Ltd. LLC | 0.00% | No change | 38 | $0 |
"% of holder's portfolio" is GBIO's weight in each manager's 13F, not the share of Generation Bio Co. the manager owns.