Korro Bio, Inc.
KRRO- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001703647
In the last 90 days, Korro Bio, Inc. insiders filed 1 open-market purchase and 8 sales; 106 institutions reported holding it in 13F filings for Q2 2026, worth $190.1M in total; no superinvestor holds it.
13F holders, Q3 2025
Institutional positions in Korro Bio, Inc. as of Sep 30, 2025. 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
- 92
- +21 vs. Q2 2025
- Shares held
- 9.76M
- +712.6K (+7.9%) vs. Q2 2025
- Total value
- $465.5M
- +$350.7M (+305.5%) vs. Q2 2025
- New holders
- 26
- 29 more added
- Sold out
- 5
- 20 more reduced
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting KRRO 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 | 106 | $190.1M |
| Q1 2026 | 99 | $144.8M |
| Q4 2025 | 83 | $60.6M |
| Q3 2025 | 92 | $465.5M |
| Q2 2025 | 71 | $114.8M |
| Q1 2025 | 75 | $169.0M |
| Q4 2024 | 84 | $359.6M |
| Q3 2024 | 71 | $285.3M |
| Q2 2024 | 64 | $285.7M |
| Q1 2024 | 49 | $618.6M |
| Q4 2023 | 40 | $301.5M |
| Q3 2023 | 42 | $2.58M |
| Q2 2023 | 41 | $1.67M |
| Q1 2023 | 43 | $2.52M |
| Q4 2022 | 50 | $28.3M |
| Q3 2022 | 55 | $14.1M |
| Q2 2022 | 58 | $13.0M |
| Q1 2022 | 86 | $33.1M |
| Q4 2021 | 84 | $90.2M |
| Q3 2021 | 88 | $130.4M |
| Q2 2021 | 91 | $193.9M |
| Q1 2021 | 115 | $186.6M |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Korro Bio, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Atlas Venture Life Science Advisors, LLC | 1,137,149 | $54.5M | 7.24% | 00.0% | Unchanged |
| NEA Management Company, LLC | 1,090,793 | $52.2M | 2.87% | 00.0% | Unchanged |
| Driehaus Capital Management LLC | 671,981 | $32.2M | 0.23% | +91,122+15.7% | Added |
| FMR LLC | 563,681 | $27.0M | 0.00% | −75,541−11.8% | Reduced |
| Point72 Asset Management, L.P. | 531,969 | $25.5M | 0.06% | −8,105−1.5% | Reduced |
| Cormorant Asset Management, LP | 465,000 | $22.3M | 1.54% | 00.0% | Unchanged |
| BlackRock, Inc. | 446,698 | $21.4M | 0.00% | −15,191−3.3% | Reduced |
| Siren, L.L.C. | 418,833 | $20.1M | 0.78% | 00.0% | Unchanged |
| TCG Crossover Management, LLC | 416,301 | $19.9M | 0.98% | +416,301 | New |
| Vanguard Group Inc | 395,659 | $18.9M | 0.00% | +8,921+2.3% | Added |
| Qiming U.S. Ventures Management, LLC | 368,085 | $17.6M | 31.68% | 00.0% | Unchanged |
| Tri Locum Partners LP | 337,764 | $16.2M | 3.72% | +198,271+142.1% | Added |
| 72 Investment Holdings, LLC | 276,831 | $13.3M | 19.51% | 00.0% | Unchanged |
| Polar Capital Holdings Plc | 264,694 | $12.7M | 0.06% | +14,694+5.9% | Added |
| Millennium Management LLC | 260,333 | $12.5M | 0.01% | +4,650+1.8% | Added |
| JPMorgan Chase & Co | 199,249 | $9.54M | 0.00% | +196,079+6,185.5% | Added |
| Morgan Stanley | 167,494 | $8.02M | 0.00% | +85,761+104.9% | Added |
| Geode Capital Management, LLC | 162,932 | $7.80M | 0.00% | +7,545+4.9% | Added |
| Citadel Advisors LLC | 153,928 | $7.37M | 0.01% | −196,718−56.1% | Reduced |
| Raymond James Financial Inc | 148,971 | $7.13M | 0.00% | +65,579+78.6% | Added |
| State Street Corp | 124,569 | $5.97M | 0.00% | +2,629+2.2% | Added |
| Blue Owl Capital Holdings LP | 105,000 | $5.03M | 1.56% | −20,000−16.0% | Reduced |
| Schonfeld Strategic Advisors LLC | 90,186 | $4.32M | 0.03% | +90,186 | New |
| Two Sigma Investments, LP | 64,455 | $3.09M | 0.00% | +27,709+75.4% | Added |
| DAFNA Capital Management LLC | 60,804 | $2.91M | 0.72% | +3,113+5.4% | Added |
| Emerald Mutual Fund Advisers Trust | 58,911 | $2.82M | 0.15% | +58,911 | New |
| Standard Life Aberdeen plc | 57,983 | $2.78M | 0.00% | −26,445−31.3% | Reduced |
| Northern Trust Corp | 57,273 | $2.74M | 0.00% | −595−1.0% | Reduced |
| F/M Investments LLC | 55,245 | $2.65M | 0.10% | +55,245 | New |
| UBS Group AG | 53,103 | $2.54M | 0.00% | +34,522+185.8% | Added |
| Woodline Partners LP | 50,094 | $2.40M | 0.01% | 00.0% | Unchanged |
| AQR Capital Management LLC | 48,407 | $2.32M | 0.00% | +48,407 | New |
| Renaissance Technologies LLC | 40,400 | $1.93M | 0.00% | −5,300−11.6% | Reduced |
| ADAR1 Capital Management, LLC | 40,235 | $1.93M | 0.19% | −28,580−41.5% | Reduced |
| Trexquant Investment LP | 38,260 | $1.83M | 0.02% | +17,390+83.3% | Added |
| Rock Springs Capital Management LP | 35,719 | $1.71M | 0.10% | 00.0% | Unchanged |
| OrbiMed Advisors LLC | 32,400 | $1.55M | 0.04% | 00.0% | Unchanged |
| Charles Schwab Investment Management Inc | 23,101 | $1.11M | 0.00% | +5,325+30.0% | Added |
| Eversept Partners, LP | 20,856 | $998.8K | 0.08% | +20,856 | New |
| Bank of New York Mellon Corp | 19,313 | $924.9K | 0.00% | +2,791+16.9% | Added |
| Emerald Advisers, LLC | 16,469 | $788.7K | 0.03% | +16,469 | New |
| Goldman Sachs Group Inc | 15,681 | $751.0K | 0.00% | +15,681 | New |
| Two Sigma Advisers, LP | 11,409 | $546.4K | 0.00% | +11,409 | New |
| Blair William & Co | 9,750 | $466.9K | 0.00% | +9,750 | New |
| Rhumbline Advisers | 9,343 | $447.4K | 0.00% | −168−1.8% | Reduced |
| Nuveen, LLC | 9,264 | $443.7K | 0.00% | +9,264 | New |
| American Century Companies Inc | 8,757 | $419.4K | 0.00% | +8,757 | New |
| Alliancebernstein L.P. | 7,700 | $368.8K | 0.00% | +7,700 | New |
| Algert Global LLC | 7,108 | $340.4K | 0.01% | +7,108 | New |
| Quantinno Capital Management LP | 6,143 | $294.2K | 0.00% | +6,143 | New |
| Royal Bank of Canada | 5,992 | $287.0K | 0.00% | −613−9.3% | Reduced |
| Wells Fargo & Company | 5,170 | $247.6K | 0.00% | +837+19.3% | Added |
| Wealth Forward, LLC | 5,009 | $239.9K | 0.14% | +5,009 | New |
| Bank of America Corp | 4,704 | $225.3K | 0.00% | −23,452−83.3% | Reduced |
| Quarry LP | 4,375 | $209.5K | 0.05% | −125−2.8% | Reduced |
| MetLife Investment Management | 3,945 | $188.9K | 0.00% | +3,945 | New |
| Deutsche Bank AG | 3,731 | $178.7K | 0.00% | +115+3.2% | Added |
| SRS Capital Advisors, Inc. | 3,610 | $172.9K | 0.00% | +3,610 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 3,138 | $150.3K | 0.00% | −364−10.4% | Reduced |
| New York State Common Retirement Fund | 3,000 | $143.7K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 2,914 | $139.6K | 0.00% | +2,914 | New |
| CWM, LLC | 2,693 | $129.0K | 0.00% | +2,145+391.4% | Added |
| Quest Partners LLC | 2,468 | $118.2K | 0.01% | −24,743−90.9% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 2,286 | $109.5K | 0.00% | +1,060+86.5% | Added |
| North Star Investment Management Corp. | 1,800 | $86.2K | 0.01% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 1,750 | $83.8K | 0.00% | +600+52.2% | Added |
| BNP Paribas Arbitrage, SA | 1,314 | $62.9K | 0.00% | +661+101.2% | Added |
| Tower Research Capital LLC (TRC) | 1,038 | $49.7K | 0.00% | −1,671−61.7% | Reduced |
| Russell Investments Group, Ltd. | 815 | $39.0K | 0.00% | +815 | New |
| Ameritas Investment Partners, Inc. | 598 | $28.6K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 526 | $25.2K | 0.00% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 458 | $21.9K | 0.00% | +337+278.5% | Added |
| Duncker Streett & Co Inc | 437 | $20.9K | 0.00% | 00.0% | Unchanged |
| California State Teachers Retirement System | 416 | $19.9K | 0.00% | −26−5.9% | Reduced |
| Essential Partners LLC | 394 | $18.9K | 0.01% | +391+13,033.3% | Added |
| Citigroup Inc | 337 | $16.1K | 0.00% | −2,147−86.4% | Reduced |
| Versant Capital Management, Inc | 271 | $13.0K | 0.00% | −11−3.9% | Reduced |
| Advisor Group Holdings, Inc. | 280 | $12.0K | 0.00% | +279+27,900.0% | Added |
| Amalgamated Bank | 211 | $10.0K | 0.00% | 00.0% | Unchanged |
| Optiver Holding B.V. | 116 | $5.55K | 0.00% | +116 | New |
| Allworth Financial LP | 92 | $4.41K | 0.00% | +92 | New |
| GAMMA Investing LLC | 89 | $4.26K | 0.00% | +23+34.8% | Added |
| EverSource Wealth Advisors, LLC | 89 | $4.26K | 0.00% | +67+304.5% | Added |
| Nisa Investment Advisors, LLC | 83 | $3.98K | 0.00% | +53+176.7% | Added |
| Wealthspire Advisors, LLC | 65 | $3.11K | 0.00% | +65 | New |
| IFP Advisors, Inc | 40 | $1.92K | 0.00% | +40 | Added |
| True Wealth Design, LLC | 19 | $910 | 0.00% | +19 | New |
| Clearstead Advisors, LLC | 18 | $863 | 0.00% | +18 | New |
| MAI Capital Management | 5 | $240 | 0.00% | 00.0% | Unchanged |
| Northwestern Mutual Wealth Management Co | 2 | $96 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 1 | $48 | 0.00% | −6−85.7% | Reduced |
| XTX Topco Ltd | 43,538 | $0 | 0.00% | +43,538 | New |
| Deep Track Capital, LP | 0 | $0 | 0.00% | −277,966−100.0% | Sold out |
| Ally Bridge Group (NY) LLC | 0 | $0 | 0.00% | −154,223−100.0% | Sold out |
| D. E. Shaw & Co., Inc. | 0 | $0 | 0.00% | −24,383−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −16,060−100.0% | Sold out |
| Rise Advisors, LLC | 0 | $0 | 0.00% | −29−100.0% | Sold out |