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 |
|---|---|---|---|---|---|
| SBI Securities Co., Ltd. | 1 | $11 | 0.00% | 00.0% | Unchanged |
| JPL Wealth Management, LLC | 2 | $23 | 0.00% | +2 | New |
| Fifth Third Bancorp | 11 | $125 | 0.00% | +11 | New |
| Sunbelt Securities, Inc. | 17 | $192 | 0.00% | +16+1,600.0% | Added |
| SJS Investment Consulting Inc. | 22 | $250 | 0.00% | +22 | New |
| Basecamp Wealth Advisors LLC | 25 | $283 | 0.00% | +25 | New |
| Fortitude Family Office, LLC | 39 | $441 | 0.00% | +39 | New |
| Nisa Investment Advisors, LLC | 40 | $453 | 0.00% | +40 | New |
| Wealth Preservation Advisors, LLC | 44 | $498 | 0.00% | +44 | New |
| Bare Financial Services, Inc | 44 | $498 | 0.00% | +44 | New |
| IFP Advisors, Inc | 45 | $509 | 0.00% | +5+12.5% | Added |
| Optiver Holding B.V. | 60 | $679 | 0.00% | −56−48.3% | Reduced |
| Farther Finance Advisors, LLC | 54 | $683 | 0.00% | +54 | New |
| Keating Financial Advisory Services, Inc. | 63 | $713 | 0.00% | 00.0% | Unchanged |
| Root Financial Partners, LLC | 63 | $713 | 0.00% | +63 | New |
| Rothschild Investment LLC | 72 | $815 | 0.00% | +66+1,100.0% | Added |
| SRS Capital Advisors, Inc. | 86 | $974 | 0.00% | +86 | New |
| Royal Bank of Canada | 104 | $1.00K | 0.00% | −120−53.6% | Reduced |
| True Wealth Design, LLC | 99 | $1.12K | 0.00% | +99 | New |
| Advisor Group Holdings, Inc. | 135 | $1.53K | 0.00% | −1,282−90.5% | Reduced |
| Sterling Capital Management LLC | 220 | $2.49K | 0.00% | −238−52.0% | Reduced |
| UBS Asset Management Americas Inc | 225 | $2.55K | 0.00% | +134+147.3% | Added |
| Advisory Services Network, LLC | 245 | $2.77K | 0.00% | +245 | New |
| Allworth Financial LP | 291 | $3.29K | 0.00% | +290+29,000.0% | Added |
| Citigroup Inc | 308 | $3.49K | 0.00% | −299−49.3% | Reduced |
| EverSource Wealth Advisors, LLC | 379 | $4.29K | 0.00% | +379 | New |
| Duncker Streett & Co Inc | 437 | $4.95K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 526 | $5.95K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 598 | $6.77K | 0.00% | 00.0% | Unchanged |
| MAI Capital Management | 606 | $6.86K | 0.00% | +601+12,020.0% | Added |
| Versant Capital Management, Inc | 691 | $7.82K | 0.00% | +691 | New |
| GAMMA Investing LLC | 737 | $8.34K | 0.00% | +635+622.5% | Added |
| The PNC Financial Services Group, Inc. | 830 | $9.40K | 0.00% | +90+12.2% | Added |
| TD Waterhouse Canada Inc. | 808 | $10.1K | 0.00% | +8+1.0% | Added |
| Essential Partners LLC | 1,322 | $15.0K | 0.01% | +1,322 | New |
| Police & Firemen's Retirement System of New Jersey | 1,373 | $15.5K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 1,644 | $18.6K | 0.00% | +253+18.2% | Added |
| North Star Investment Management Corp. | 1,800 | $20.4K | 0.00% | 00.0% | Unchanged |
| Vanguard Global Advisers, LLC | 1,929 | $21.8K | 0.00% | +1,929 | New |
| Russell Investments Group, Ltd. | 2,115 | $23.9K | 0.00% | +185+9.6% | Added |
| BNP Paribas Arbitrage, SA | 2,354 | $26.6K | 0.00% | +867+58.3% | Added |
| Wells Fargo & Company | 2,589 | $29.3K | 0.00% | −4,933−65.6% | Reduced |
| New York State Common Retirement Fund | 3,000 | $34.0K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 3,214 | $36.4K | 0.00% | +68+2.2% | Added |
| CWM, LLC | 9,772 | $110.6K | 0.00% | +9,484+3,293.1% | Added |
| Rhumbline Advisers | 9,850 | $111.5K | 0.00% | −400−3.9% | Reduced |
| Deutsche Bank AG | 10,544 | $119.4K | 0.00% | −2,214−17.4% | Reduced |
| HRT Financial LP | 10,790 | $122.0K | 0.00% | +10,790 | New |
| Ieq Capital, LLC | 12,777 | $144.6K | 0.00% | +12,777 | New |
| Charles Schwab Investment Management Inc | 13,394 | $151.6K | 0.00% | −2,935−18.0% | Reduced |
| Guggenheim Capital LLC | 14,097 | $159.6K | 0.00% | +3,658+35.0% | Added |
| Susquehanna Portfolio Strategies, LLC | 19,125 | $216.5K | 0.00% | +19,125 | New |
| Algert Global LLC | 19,185 | $217.2K | 0.00% | −7,880−29.1% | Reduced |
| Quadrature Capital Ltd | 20,356 | $230.4K | 0.00% | −6,708−24.8% | Reduced |
| UBS Group AG | 21,676 | $245.4K | 0.00% | +1,681+8.4% | Added |
| Bank of New York Mellon Corp | 21,730 | $246.0K | 0.00% | +2,875+15.2% | Added |
| Engineers Gate Manager LP | 23,702 | $268.3K | 0.00% | −3,183−11.8% | Reduced |
| Mariner, LLC | 25,819 | $292.1K | 0.00% | +25,819 | New |
| AIHC Capital Management Ltd | 30,265 | $342.6K | 0.29% | 00.0% | Unchanged |
| Citadel Advisors LLC | 30,914 | $349.9K | 0.00% | −27,415−47.0% | Reduced |
| Marshall Wace, LLP | 34,343 | $388.8K | 0.00% | +14,571+73.7% | Added |
| Quantinno Capital Management LP | 35,978 | $407.3K | 0.00% | +8,381+30.4% | Added |
| FMR LLC | 38,900 | $440.3K | 0.00% | +1,043+2.8% | Added |
| Morgan Stanley | 41,123 | $465.5K | 0.00% | −28,605−41.0% | Reduced |
| Vanguard Fiduciary Trust Co | 41,541 | $470.2K | 0.00% | +41,541 | New |
| Acadian Asset Management LLC | 41,825 | $471.0K | 0.00% | +8,035+23.8% | Added |
| Boothbay Fund Management, LLC | 42,000 | $475.4K | 0.01% | +42,000 | New |
| Raymond James Financial Inc | 42,838 | $484.9K | 0.00% | +19,807+86.0% | Added |
| Goldman Sachs Group Inc | 50,541 | $572.1K | 0.00% | −1,409−2.7% | Reduced |
| Trexquant Investment LP | 56,208 | $636.3K | 0.00% | +56,208 | New |
| Northern Trust Corp | 57,702 | $653.2K | 0.00% | +2,062+3.7% | Added |
| XTX Topco Ltd | 60,472 | $684.5K | 0.01% | +3,405+6.0% | Added |
| JPMorgan Chase & Co | 68,500 | $704.2K | 0.00% | +65,662+2,313.7% | Added |
| 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 |
| Millennium Management LLC | 63,606 | $720.0K | 0.00% | −97,486−60.5% | Reduced |
| Kalehua Capital Management LLC | 109,376 | $1.24M | 0.88% | +109,376 | New |
| Jane Street Group, LLC | 115,704 | $1.31M | 0.00% | −172,753−59.9% | Reduced |
| Renaissance Technologies LLC | 136,227 | $1.54M | 0.00% | +61,327+81.9% | Added |
| State Street Corp | 140,341 | $1.59M | 0.00% | −5,880−4.0% | Reduced |
| Vanguard Portfolio Management LLC | 148,559 | $1.68M | 0.00% | +148,559 | New |
| Two Sigma Investments, LP | 165,472 | $1.87M | 0.00% | +86,488+109.5% | Added |
| Geode Capital Management, LLC | 173,643 | $1.97M | 0.00% | +10,883+6.7% | Added |
| Adage Capital Partners GP, L.L.C. | 228,400 | $2.59M | 0.00% | +228,400 | New |
| AQR Capital Management LLC | 267,755 | $3.03M | 0.00% | +227,108+558.7% | Added |
| 72 Investment Holdings, LLC | 276,831 | $3.13M | 6.32% | 00.0% | Unchanged |
| Vanguard Capital Management LLC | 310,913 | $3.52M | 0.00% | +310,913 | New |
| Siren, L.L.C. | 347,718 | $3.94M | 0.11% | 00.0% | Unchanged |
| TCG Crossover Management, LLC | 416,301 | $4.71M | 0.13% | 00.0% | Unchanged |
| Driehaus Capital Management LLC | 450,045 | $5.09M | 0.04% | +450,045 | New |
| BlackRock, Inc. | 460,006 | $5.21M | 0.00% | +2,607+0.6% | Added |
| ADAR1 Capital Management, LLC | 540,054 | $6.11M | 0.37% | +540,054 | New |
| Nantahala Capital Management, LLC | 660,036 | $7.47M | 0.47% | +60,036+10.0% | Added |
| Affinity Asset Advisors, LLC | 706,904 | $8.00M | 0.47% | +706,904 | New |
| VR Adviser, LLC | 1,009,500 | $11.4M | 0.43% | +1,009,500 | New |
| Balyasny Asset Management LLC | 1,040,054 | $11.8M | 0.02% | +1,040,054 | New |
| Atlas Venture Life Science Advisors, LLC | 1,137,149 | $12.9M | 1.63% | 00.0% | Unchanged |
| NEA Management Company, LLC | 1,297,893 | $14.7M | 0.84% | +207,100+19.0% | Added |
| Lynx1 Capital Management LP | 1,538,296 | $17.4M | 2.75% | +860,381+126.9% | Added |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −196,827−100.0% | Sold out |