Korro BioKRRO
13F holders, Q3 2025 (September 30)92holders +22
26new positions
5sold out
5famous investors
$47.68avg. 13F price*
At the end of Q3 2025, 92 institutions reported holding Korro Bio Inc. (KRRO) in their 13F filings, up 22 from Q2 2025. 26 opened new positions and 5 sold out. The largest holders were Atlas Venture Life Science Advisors, LLC ($54.5M), NEA Management Company, LLC ($52.2M) and Driehaus Capital Management LLC ($32.2M). 5 famous investors held it, including Steve Cohen (0.1% of Point72 Asset Management's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Korro Bio Inc.
- CUSIP
- 500946108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 26 | $38.3M |
| Exits | 5 | $5.9M |
All 13F filers, Q2 2025 → Q3 2025: 1,615,037 shares bought and 902,462 shares sold, net +712,575 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 92 holders
| Atlas Venture Life Science Advisors, LLC | 7.24% | No change | 1,137,149 | $54.5M |
| NEA Management Company, LLC | 2.87% | No change | 1,090,793 | $52.2M |
| Driehaus Capital Management LLC | 0.23% | Add +15.7% | 671,981 | $32.2M |
| FMR LLC | 0.00% | Reduce -11.8% | 563,681 | $27.0M |
| Point72 Asset Management | 0.06% | Reduce -1.5% | 531,969 | $25.5M |
| Cormorant Asset Management, LP | 1.54% | No change | 465,000 | $22.3M |
| BlackRock, Inc. | 0.00% | Reduce -3.3% | 446,698 | $21.4M |
| Siren, L.L.C. | 0.78% | No change | 418,833 | $20.1M |
| TCG Crossover Management, LLC | 0.98% | New | 416,301 | $19.9M |
| Vanguard Group Inc. | 0.00% | Add +2.3% | 395,659 | $18.9M |
| Qiming U.S. Ventures Management, LLC | 31.68% | No change | 368,085 | $17.6M |
| Tri Locum Partners LP | 3.72% | Add +142.1% | 337,764 | $16.2M |
| 72 Investment Holdings, LLC | 19.51% | No change | 276,831 | $13.3M |
| Polar Capital Holdings Plc | 0.06% | Add +5.9% | 264,694 | $12.7M |
| Millennium Management | 0.01% | Add +1.8% | 260,333 | $12.5M |
| JPMorgan Chase & Co. | 0.00% | Add +6185.5% | 199,249 | $9.5M |
| Morgan Stanley | 0.00% | Add +104.9% | 167,494 | $8.0M |
| Geode Capital Management, LLC | 0.00% | Add +4.9% | 162,932 | $7.8M |
| Citadel Advisors | 0.01% | Reduce -56.1% | 153,928 | $7.4M |
| Raymond James Financial Inc. | 0.00% | Add +78.6% | 148,971 | $7.1M |
| State Street Corp. | 0.00% | Add +2.2% | 124,569 | $6.0M |
| Blue Owl Capital Holdings LP | 1.57% | Reduce -16.0% | 105,000 | $5.0M |
| Schonfeld Strategic Advisors LLC | 0.03% | New | 90,186 | $4.3M |
| Two Sigma Investments, LP | 0.01% | Add +75.4% | 64,455 | $3.1M |
| DAFNA Capital Management LLC | 0.73% | Add +5.4% | 60,804 | $2.9M |
| Emerald Mutual Fund Advisers Trust | 0.15% | New | 58,911 | $2.8M |
| Aberdeen Group plc | 0.00% | Reduce -31.3% | 57,983 | $2.8M |
| Northern Trust Corp. | 0.00% | Reduce -1.0% | 57,273 | $2.7M |
| F/m Investments LLC | 0.10% | New | 55,245 | $2.6M |
| UBS Group AG | 0.00% | Add +185.8% | 53,103 | $2.5M |
| Woodline Partners LP | 0.01% | No change | 50,094 | $2.4M |
| AQR Capital Management | 0.00% | New | 48,407 | $2.3M |
| Renaissance Technologies | 0.00% | Reduce -11.6% | 40,400 | $1.9M |
| ADAR1 Capital Management, LLC | 0.19% | Reduce -41.5% | 40,235 | $1.9M |
| Trexquant Investment LP | 0.02% | Add +83.3% | 38,260 | $1.8M |
| Rock Springs Capital Management LP | 0.10% | No change | 35,719 | $1.7M |
| Orbimed Advisors LLC | 0.04% | No change | 32,400 | $1.6M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +30.0% | 23,101 | $1.1M |
| Eversept Partners, LP | 0.08% | New | 20,856 | $999K |
| Bank of New York Mellon Corp | 0.00% | Add +16.9% | 19,313 | $925K |
| Emerald Advisers, LLC | 0.03% | New | 16,469 | $789K |
| Goldman Sachs Group Inc. | 0.00% | New | 15,681 | $751K |
| Two Sigma Advisers, LP | 0.00% | New | 11,409 | $546K |
| Blair William & Co. | 0.00% | New | 9,750 | $467K |
| Rhumbline Advisers | 0.00% | Reduce -1.8% | 9,343 | $447K |
| Nuveen, LLC | 0.00% | New | 9,264 | $444K |
| American Century Companies Inc. | 0.00% | New | 8,757 | $419K |
| Alliancebernstein L.P. | 0.00% | New | 7,700 | $369K |
| Algert Global LLC | 0.01% | New | 7,108 | $340K |
| Quantinno Capital Management LP | 0.00% | New | 6,143 | $294K |
| Royal Bank of Canada | 0.00% | Reduce -9.3% | 5,992 | $287K |
| Wells Fargo & Company | 0.00% | Add +19.3% | 5,170 | $248K |
| Wealth Forward, LLC | 0.14% | New | 5,009 | $240K |
| Bank of America Corp. | 0.00% | Reduce -83.3% | 4,704 | $225K |
| Quarry LP | 0.05% | Reduce -2.8% | 4,375 | $210K |
| MetLife Investment Management, LLC | 0.00% | New | 3,945 | $189K |
| Deutsche Bank AG | 0.00% | Add +3.2% | 3,731 | $179K |
| Arax Advisory Partners | 0.00% | New | 3,610 | $173K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -10.4% | 3,138 | $150K |
| New York State Common Retirement Fund | 0.00% | No change | 3,000 | $144K |
| PNC Financial Services Group, Inc. | 0.00% | New | 2,914 | $140K |
| Cwm, LLC | 0.00% | Add +391.4% | 2,693 | $129K |
| AlphaQuest LLC | 0.01% | Reduce -90.9% | 2,468 | $118K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | Add +86.5% | 2,286 | $109K |
| North Star Investment Management Corp. | 0.01% | No change | 1,800 | $86K |
| Steward Partners Investment Advisory, LLC | 0.00% | Add +52.2% | 1,750 | $84K |
| BNP Paribas Financial Markets | 0.00% | Add +101.2% | 1,314 | $63K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -61.7% | 1,038 | $50K |
| Russell Investments Group, Ltd. | 0.00% | New | 815 | $39K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 598 | $29K |
| Legal & General Group Plc | 0.00% | No change | 526 | $25K |
| Sterling Capital Management LLC | 0.00% | Add +278.5% | 458 | $22K |
| Duncker Streett & Co. Inc. | 0.00% | No change | 437 | $21K |
| California State Teachers Retirement System | 0.00% | Reduce -5.9% | 416 | $20K |
| Essential Partners LLC | 0.01% | Add +13033.3% | 394 | $19K |
| Citigroup Inc. | 0.00% | Reduce -86.4% | 337 | $16K |
| Versant Capital Management, Inc | 0.00% | Reduce -3.9% | 271 | $13K |
| Osaic Holdings, Inc. | 0.00% | Add +27900.0% | 280 | $12K |
| Amalgamated Bank | 0.00% | No change | 211 | $10K |
| Optiver Holding B.V. | 0.00% | New | 116 | $6K |
| Allworth Financial LP | 0.00% | New | 92 | $4K |
| EverSource Wealth Advisors, LLC | 0.00% | Add +304.6% | 89 | $4K |
| GAMMA Investing LLC | 0.00% | Add +34.9% | 89 | $4K |
| Nisa Investment Advisors, LLC | 0.00% | Add +176.7% | 83 | $4K |
| Wealthspire Advisors, LLC | 0.00% | New | 65 | $3K |
| IFP Advisors, Inc | 0.00% | Add +0.0% | 40 | $2K |
| True Wealth Design, LLC | 0.00% | New | 19 | $910 |
| Clearstead Advisors, LLC | 0.00% | New | 18 | $863 |
| MAI Capital Management | 0.00% | No change | 5 | $240 |
| Northwestern Mutual Wealth Management Co. | 0.00% | No change | 2 | $96 |
| SBI Securities Co., Ltd. | 0.00% | Reduce -85.7% | 1 | $48 |
| XTX Topco Ltd | 0.00% | New | 43,538 | $0 |
"% of holder's portfolio" is KRRO's weight in each manager's 13F, not the share of Korro Bio Inc. the manager owns.