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, Q1 2026
Institutional positions in Korro Bio, Inc. as of Mar 31, 2026. 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
- 99
- +18 vs. Q4 2025
- Shares held
- 12.8M
- +5.73M (+81.0%) vs. Q4 2025
- Total value
- $144.8M
- +$88.2M (+155.7%) vs. Q4 2025
- New holders
- 33
- 33 more added
- Sold out
- 15
- 20 more reduced
2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Korro Bio, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Lynx1 Capital Management LP | 1,538,296 | $17.4M | 2.75% | +860,381+126.9% | Added |
| NEA Management Company, LLC | 1,297,893 | $14.7M | 0.84% | +207,100+19.0% | Added |
| Atlas Venture Life Science Advisors, LLC | 1,137,149 | $12.9M | 1.63% | 00.0% | Unchanged |
| Balyasny Asset Management LLC | 1,040,054 | $11.8M | 0.02% | +1,040,054 | New |
| VR Adviser, LLC | 1,009,500 | $11.4M | 0.43% | +1,009,500 | New |
| Affinity Asset Advisors, LLC | 706,904 | $8.00M | 0.47% | +706,904 | New |
| Nantahala Capital Management, LLC | 660,036 | $7.47M | 0.47% | +60,036+10.0% | Added |
| ADAR1 Capital Management, LLC | 540,054 | $6.11M | 0.37% | +540,054 | New |
| BlackRock, Inc. | 460,006 | $5.21M | 0.00% | +2,607+0.6% | Added |
| Driehaus Capital Management LLC | 450,045 | $5.09M | 0.04% | +450,045 | New |
| TCG Crossover Management, LLC | 416,301 | $4.71M | 0.13% | 00.0% | Unchanged |
| Siren, L.L.C. | 347,718 | $3.94M | 0.11% | 00.0% | Unchanged |
| Vanguard Capital Management LLC | 310,913 | $3.52M | 0.00% | +310,913 | New |
| 72 Investment Holdings, LLC | 276,831 | $3.13M | 6.32% | 00.0% | Unchanged |
| AQR Capital Management LLC | 267,755 | $3.03M | 0.00% | +227,108+558.7% | Added |
| Adage Capital Partners GP, L.L.C. | 228,400 | $2.59M | 0.00% | +228,400 | New |
| Geode Capital Management, LLC | 173,643 | $1.97M | 0.00% | +10,883+6.7% | Added |
| Two Sigma Investments, LP | 165,472 | $1.87M | 0.00% | +86,488+109.5% | Added |
| Vanguard Portfolio Management LLC | 148,559 | $1.68M | 0.00% | +148,559 | New |
| State Street Corp | 140,341 | $1.59M | 0.00% | −5,880−4.0% | Reduced |
| Renaissance Technologies LLC | 136,227 | $1.54M | 0.00% | +61,327+81.9% | Added |
| Jane Street Group, LLC | 115,704 | $1.31M | 0.00% | −172,753−59.9% | Reduced |
| Kalehua Capital Management LLC | 109,376 | $1.24M | 0.88% | +109,376 | New |
| Millennium Management LLC | 63,606 | $720.0K | 0.00% | −97,486−60.5% | Reduced |
| Emerald Mutual Fund Advisers Trust | 62,855 | $711.5K | 0.03% | −2,693−4.1% | Reduced |
| F/M Investments LLC | 62,855 | $711.5K | 0.05% | −2,693−4.1% | Reduced |
| JPMorgan Chase & Co | 68,500 | $704.2K | 0.00% | +65,662+2,313.7% | Added |
| XTX Topco Ltd | 60,472 | $684.5K | 0.01% | +3,405+6.0% | Added |
| Northern Trust Corp | 57,702 | $653.2K | 0.00% | +2,062+3.7% | Added |
| Trexquant Investment LP | 56,208 | $636.3K | 0.00% | +56,208 | New |
| Goldman Sachs Group Inc | 50,541 | $572.1K | 0.00% | −1,409−2.7% | Reduced |
| Raymond James Financial Inc | 42,838 | $484.9K | 0.00% | +19,807+86.0% | Added |
| Boothbay Fund Management, LLC | 42,000 | $475.4K | 0.01% | +42,000 | New |
| Acadian Asset Management LLC | 41,825 | $471.0K | 0.00% | +8,035+23.8% | Added |
| Vanguard Fiduciary Trust Co | 41,541 | $470.2K | 0.00% | +41,541 | New |
| Morgan Stanley | 41,123 | $465.5K | 0.00% | −28,605−41.0% | Reduced |
| FMR LLC | 38,900 | $440.3K | 0.00% | +1,043+2.8% | Added |
| Quantinno Capital Management LP | 35,978 | $407.3K | 0.00% | +8,381+30.4% | Added |
| Marshall Wace, LLP | 34,343 | $388.8K | 0.00% | +14,571+73.7% | Added |
| Citadel Advisors LLC | 30,914 | $349.9K | 0.00% | −27,415−47.0% | Reduced |
| AIHC Capital Management Ltd | 30,265 | $342.6K | 0.29% | 00.0% | Unchanged |
| Mariner, LLC | 25,819 | $292.1K | 0.00% | +25,819 | New |
| Engineers Gate Manager LP | 23,702 | $268.3K | 0.00% | −3,183−11.8% | Reduced |
| Bank of New York Mellon Corp | 21,730 | $246.0K | 0.00% | +2,875+15.2% | Added |
| UBS Group AG | 21,676 | $245.4K | 0.00% | +1,681+8.4% | Added |
| Quadrature Capital Ltd | 20,356 | $230.4K | 0.00% | −6,708−24.8% | Reduced |
| Algert Global LLC | 19,185 | $217.2K | 0.00% | −7,880−29.1% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 19,125 | $216.5K | 0.00% | +19,125 | New |
| Guggenheim Capital LLC | 14,097 | $159.6K | 0.00% | +3,658+35.0% | Added |
| Charles Schwab Investment Management Inc | 13,394 | $151.6K | 0.00% | −2,935−18.0% | Reduced |
| Ieq Capital, LLC | 12,777 | $144.6K | 0.00% | +12,777 | New |
| HRT Financial LP | 10,790 | $122.0K | 0.00% | +10,790 | New |
| Deutsche Bank AG | 10,544 | $119.4K | 0.00% | −2,214−17.4% | Reduced |
| Rhumbline Advisers | 9,850 | $111.5K | 0.00% | −400−3.9% | Reduced |
| CWM, LLC | 9,772 | $110.6K | 0.00% | +9,484+3,293.1% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 3,214 | $36.4K | 0.00% | +68+2.2% | Added |
| New York State Common Retirement Fund | 3,000 | $34.0K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 2,589 | $29.3K | 0.00% | −4,933−65.6% | Reduced |
| BNP Paribas Arbitrage, SA | 2,354 | $26.6K | 0.00% | +867+58.3% | Added |
| Russell Investments Group, Ltd. | 2,115 | $23.9K | 0.00% | +185+9.6% | Added |
| Vanguard Global Advisers, LLC | 1,929 | $21.8K | 0.00% | +1,929 | New |
| North Star Investment Management Corp. | 1,800 | $20.4K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 1,644 | $18.6K | 0.00% | +253+18.2% | Added |
| Police & Firemen's Retirement System of New Jersey | 1,373 | $15.5K | 0.00% | 00.0% | Unchanged |
| Essential Partners LLC | 1,322 | $15.0K | 0.01% | +1,322 | New |
| TD Waterhouse Canada Inc. | 808 | $10.1K | 0.00% | +8+1.0% | Added |
| The PNC Financial Services Group, Inc. | 830 | $9.40K | 0.00% | +90+12.2% | Added |
| GAMMA Investing LLC | 737 | $8.34K | 0.00% | +635+622.5% | Added |
| Versant Capital Management, Inc | 691 | $7.82K | 0.00% | +691 | New |
| MAI Capital Management | 606 | $6.86K | 0.00% | +601+12,020.0% | Added |
| Ameritas Investment Partners, Inc. | 598 | $6.77K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 526 | $5.95K | 0.00% | 00.0% | Unchanged |
| Duncker Streett & Co Inc | 437 | $4.95K | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 379 | $4.29K | 0.00% | +379 | New |
| Citigroup Inc | 308 | $3.49K | 0.00% | −299−49.3% | Reduced |
| Allworth Financial LP | 291 | $3.29K | 0.00% | +290+29,000.0% | Added |
| Advisory Services Network, LLC | 245 | $2.77K | 0.00% | +245 | New |
| UBS Asset Management Americas Inc | 225 | $2.55K | 0.00% | +134+147.3% | Added |
| Sterling Capital Management LLC | 220 | $2.49K | 0.00% | −238−52.0% | Reduced |
| Advisor Group Holdings, Inc. | 135 | $1.53K | 0.00% | −1,282−90.5% | Reduced |
| True Wealth Design, LLC | 99 | $1.12K | 0.00% | +99 | New |
| Royal Bank of Canada | 104 | $1.00K | 0.00% | −120−53.6% | Reduced |
| SRS Capital Advisors, Inc. | 86 | $974 | 0.00% | +86 | New |
| Rothschild Investment LLC | 72 | $815 | 0.00% | +66+1,100.0% | Added |
| Keating Financial Advisory Services, Inc. | 63 | $713 | 0.00% | 00.0% | Unchanged |
| Root Financial Partners, LLC | 63 | $713 | 0.00% | +63 | New |
| Farther Finance Advisors, LLC | 54 | $683 | 0.00% | +54 | New |
| Optiver Holding B.V. | 60 | $679 | 0.00% | −56−48.3% | Reduced |
| IFP Advisors, Inc | 45 | $509 | 0.00% | +5+12.5% | Added |
| Wealth Preservation Advisors, LLC | 44 | $498 | 0.00% | +44 | New |
| Bare Financial Services, Inc | 44 | $498 | 0.00% | +44 | New |
| Nisa Investment Advisors, LLC | 40 | $453 | 0.00% | +40 | New |
| Fortitude Family Office, LLC | 39 | $441 | 0.00% | +39 | New |
| Basecamp Wealth Advisors LLC | 25 | $283 | 0.00% | +25 | New |
| SJS Investment Consulting Inc. | 22 | $250 | 0.00% | +22 | New |
| Sunbelt Securities, Inc. | 17 | $192 | 0.00% | +16+1,600.0% | Added |
| Fifth Third Bancorp | 11 | $125 | 0.00% | +11 | New |
| JPL Wealth Management, LLC | 2 | $23 | 0.00% | +2 | New |
| SBI Securities Co., Ltd. | 1 | $11 | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −196,827−100.0% | Sold out |