Korro Bio, Inc. - KRRO
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lynx1 Capital Management LP | History | Added to | 1,538,296 | 17,413 | 2.75% | 1.1% | 1 | +860,381 | 126.92% | Q1 2026 | May 01, 2026 |
| NEA Management Company, LLC | History | Added to | 1,297,893 | 14,692 | 0.84% | 0.45% | 2 | +207,100 | 18.99% | Q1 2026 | May 15, 2026 |
| Atlas Venture Life Science Advisors, LLC | History | No change | 1,137,149 | 12,872 | 1.63% | 1.05% | 3 | 0 | 0.0% | Q1 2026 | May 14, 2026 |
| BALYASNY ASSET MANAGEMENT L.P. | History | New | 1,040,054 | 11,773 | 0.02% | — | 4 | +1,040,054 | New | Q1 2026 | May 15, 2026 |
| Venrock Adviser, LLC | History | New | 1,009,500 | 11,427 | 0.43% | — | 5 | +1,009,500 | New | Q1 2026 | May 15, 2026 |
| Affinity Asset Advisors, LLC | History | New | 706,904 | 8,002 | 0.41% | — | 6 | +706,904 | New | Q1 2026 | May 14, 2026 |
| Nantahala Capital Management, LLC | History | Added to | 660,036 | 7,471 | 0.28% | 0.16% | 7 | +60,036 | 10.01% | Q1 2026 | May 15, 2026 |
| ADAR1 Capital Management, LLC | History | New | 540,054 | 6,113 | 0.36% | — | 8 | +540,054 | New | Q1 2026 | May 15, 2026 |
| BlackRock, Inc. | History | Added to | 460,006 | 5,207 | 0.0% | 0.0% | 9 | +2,607 | 0.57% | Q1 2026 | May 13, 2026 |
| DRIEHAUS CAPITAL MANAGEMENT LLC | History | New | 450,045 | 5,094 | 0.04% | — | 10 | +450,045 | New | Q1 2026 | May 15, 2026 |
| TCG Crossover Management, LLC | History | No change | 416,301 | 4,712 | 0.13% | 0.11% | 11 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Siren, L.L.C. | History | No change | 347,718 | 3,936 | 0.11% | 0.08% | 12 | 0 | 0.0% | Q1 2026 | May 14, 2026 |
| VANGUARD GROUP INC | History | No change | 489,639 | 3,922 | 0.0% | 0.0% | 13 | 0 | 0.0% | Q4 2025 | Jan 29, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | History | New | 310,913 | 3,519 | 0.0% | — | 14 | +310,913 | New | Q1 2026 | May 15, 2026 |
| 72 Investment Holdings, LLC | History | No change | 276,831 | 3,133 | 6.32% | 4.38% | 15 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| CITADEL ADVISORS LLC | History | Reduced | 269,114 | 3,046 | 0.0% | 0.0% | 16 | -82,915 | -23.55% | Q1 2026 | May 15, 2026 |
| AQR CAPITAL MANAGEMENT LLC | History | Added to | 267,755 | 3,030 | 0.0% | 0.0% | 17 | +227,108 | 558.73% | Q1 2026 | May 15, 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | History | New | 228,400 | 2,585 | 0.0% | — | 18 | +228,400 | New | Q1 2026 | May 15, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Reduced | 204,100 | 2,310 | 0.0% | 0.0% | 19 | -304,927 | -59.9% | Q1 2026 | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Added to | 173,643 | 1,965 | 0.0% | 0.0% | 20 | +10,883 | 6.69% | Q1 2026 | May 15, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | Added to | 165,472 | 1,873 | 0.0% | 0.0% | 21 | +86,488 | 109.5% | Q1 2026 | May 15, 2026 |
| JANE STREET GROUP, LLC | History | Reduced | 158,504 | 1,794 | 0.0% | 0.0% | 22 | -445,853 | -73.77% | Q1 2026 | May 12, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | History | New | 148,559 | 1,681 | 0.0% | — | 23 | +148,559 | New | Q1 2026 | May 08, 2026 |
| STATE STREET CORP | History | Reduced | 140,341 | 1,588 | 0.0% | 0.0% | 24 | -5,880 | -4.02% | Q1 2026 | May 15, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Added to | 136,227 | 1,542 | 0.0% | 0.0% | 25 | +61,327 | 81.88% | Q1 2026 | May 14, 2026 |
| MILLENNIUM MANAGEMENT LLC | History | Reduced | 63,606 | 720 | 0.0% | 0.0% | 26 | -97,486 | -60.52% | Q1 2026 | May 15, 2026 |
| EMERALD MUTUAL FUND ADVISERS TRUST | History | Reduced | 62,855 | 711 | 0.03% | 0.03% | 27 | -2,693 | -4.11% | Q1 2026 | May 04, 2026 |
| F/m Investments LLC | History | Reduced | 62,855 | 711 | 0.05% | 0.02% | 28 | -2,693 | -4.11% | Q1 2026 | May 11, 2026 |
| JPMORGAN CHASE & CO | History | Added to | 68,500 | 704 | 0.0% | 0.0% | 29 | +65,662 | 2313.67% | Q1 2026 | May 13, 2026 |
| XTX Topco Ltd | History | Added to | 60,472 | 684 | 0.01% | 0.01% | 30 | +3,405 | 5.97% | Q1 2026 | May 15, 2026 |
| NORTHERN TRUST CORP | History | Added to | 57,702 | 653 | 0.0% | 0.0% | 31 | +2,062 | 3.71% | Q1 2026 | May 14, 2026 |
| Trexquant Investment LP | History | New | 56,208 | 636 | 0.0% | — | 32 | +56,208 | New | Q1 2026 | May 15, 2026 |
| GOLDMAN SACHS GROUP INC | History | Reduced | 50,541 | 572 | 0.0% | 0.0% | 33 | -1,409 | -2.71% | Q1 2026 | May 15, 2026 |
| RAYMOND JAMES FINANCIAL INC | History | Added to | 42,838 | 484 | 0.0% | 0.0% | 34 | +19,807 | 86.0% | Q1 2026 | May 14, 2026 |
| BOOTHBAY FUND MANAGEMENT, LLC | History | New | 42,000 | 475 | 0.01% | — | 35 | +42,000 | New | Q1 2026 | May 15, 2026 |
| ACADIAN ASSET MANAGEMENT LLC | History | Added to | 41,825 | 471 | 0.0% | 0.0% | 36 | +8,035 | 23.78% | Q1 2026 | May 13, 2026 |
| VANGUARD FIDUCIARY TRUST CO | History | New | 41,541 | 470 | 0.0% | — | 37 | +41,541 | New | Q1 2026 | May 08, 2026 |
| MORGAN STANLEY | History | Reduced | 41,123 | 465 | 0.0% | 0.0% | 38 | -28,605 | -41.02% | Q1 2026 | May 15, 2026 |
| FMR LLC | History | Added to | 38,900 | 440 | 0.0% | 0.0% | 39 | +1,043 | 2.76% | Q1 2026 | May 15, 2026 |
| Quantinno Capital Management LP | History | Added to | 35,978 | 407 | 0.0% | 0.0% | 40 | +8,381 | 30.37% | Q1 2026 | May 15, 2026 |
| MARSHALL WACE, LLP | History | Added to | 34,343 | 388 | 0.0% | 0.0% | 41 | +14,571 | 73.7% | Q1 2026 | May 14, 2026 |
| AIHC Capital Management Ltd | History | No change | 30,265 | 342 | 0.29% | 0.23% | 42 | 0 | 0.0% | Q1 2026 | May 08, 2026 |
| Mariner, LLC | History | New | 25,819 | 292 | 0.0% | — | 43 | +25,819 | New | Q1 2026 | May 13, 2026 |
| Engineers Gate Manager LP | History | Reduced | 23,702 | 268 | 0.0% | 0.0% | 44 | -3,183 | -11.84% | Q1 2026 | May 15, 2026 |
| Bank of New York Mellon Corp | History | Added to | 21,730 | 245 | 0.0% | 0.0% | 45 | +2,875 | 15.25% | Q1 2026 | May 05, 2026 |
| UBS Group AG | History | Added to | 21,676 | 245 | 0.0% | 0.0% | 46 | +1,681 | 8.41% | Q1 2026 | May 05, 2026 |
| Quadrature Capital Ltd | History | Reduced | 20,356 | 230 | 0.0% | 0.0% | 47 | -6,708 | -24.79% | Q1 2026 | May 15, 2026 |
| ALGERT GLOBAL LLC | History | Reduced | 19,185 | 217 | 0.0% | 0.0% | 48 | -7,880 | -29.12% | Q1 2026 | May 14, 2026 |
| Susquehanna Portfolio Strategies, LLC | History | New | 19,125 | 216 | 0.0% | — | 49 | +19,125 | New | Q1 2026 | May 15, 2026 |
| GUGGENHEIM CAPITAL LLC | History | Added to | 14,097 | 159 | 0.0% | 0.0% | 50 | +3,658 | 35.04% | Q1 2026 | May 15, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | History | Reduced | 13,394 | 151 | 0.0% | 0.0% | 51 | -2,935 | -17.97% | Q1 2026 | May 15, 2026 |
| IEQ CAPITAL, LLC | History | New | 12,777 | 144 | 0.0% | — | 52 | +12,777 | New | Q1 2026 | May 14, 2026 |
| HRT FINANCIAL LP | History | New | 10,790 | 122 | 0.0% | — | 53 | +10,790 | New | Q1 2026 | May 14, 2026 |
| DEUTSCHE BANK AG\ | History | Reduced | 10,544 | 119 | 0.0% | 0.0% | 54 | -2,214 | -17.35% | Q1 2026 | May 06, 2026 |
| RHUMBLINE ADVISERS | History | Reduced | 9,850 | 111 | 0.0% | 0.0% | 55 | -400 | -3.9% | Q1 2026 | May 12, 2026 |
| CWM, LLC | History | Added to | 9,772 | 110 | 0.0% | 0.0% | 56 | +9,484 | 3293.06% | Q1 2026 | May 14, 2026 |
| TWO SIGMA ADVISERS, LP | History | No change | 11,237 | 90 | 0.0% | 0.0% | 57 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| AlphaQuest LLC | History | No change | 7,703 | 61 | 0.0% | 0.0% | 58 | 0 | 0.0% | Q4 2025 | Feb 09, 2026 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | History | Added to | 3,214 | 36 | 0.0% | 0.0% | 59 | +68 | 2.16% | Q1 2026 | May 15, 2026 |
| NEW YORK STATE COMMON RETIREMENT FUND | History | No change | 3,000 | 33 | 0.0% | 0.0% | 60 | 0 | 0.0% | Q1 2026 | May 06, 2026 |
| WELLS FARGO & COMPANY/MN | History | Reduced | 2,589 | 29 | 0.0% | 0.0% | 61 | -4,933 | -65.58% | Q1 2026 | May 11, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | Added to | 2,354 | 26 | 0.0% | 0.0% | 62 | +867 | 58.31% | Q1 2026 | May 12, 2026 |
| Russell Investments Group, Ltd. | History | Added to | 2,115 | 23 | 0.0% | 0.0% | 63 | +185 | 9.59% | Q1 2026 | May 08, 2026 |
| Vanguard Global Advisers, LLC | History | New | 1,929 | 21 | 0.0% | — | 64 | +1,929 | New | Q1 2026 | May 08, 2026 |
| North Star Investment Management Corp. | History | No change | 1,800 | 20 | 0.0% | 0.0% | 65 | 0 | 0.0% | Q1 2026 | Apr 23, 2026 |
| Tower Research Capital LLC (TRC) | History | Added to | 1,644 | 18 | 0.0% | 0.0% | 66 | +253 | 18.19% | Q1 2026 | May 15, 2026 |
| Police & Firemen's Retirement System of New Jersey | History | No change | 1,373 | 15 | 0.0% | 0.0% | 67 | 0 | 0.0% | Q1 2026 | Apr 29, 2026 |
| Essential Partners LLC | History | New | 1,322 | 14 | 0.0% | — | 68 | +1,322 | New | Q1 2026 | May 21, 2026 |
| SIMPLEX TRADING, LLC | History | Reduced | 1,200 | 13 | 0.0% | 0.0% | 69 | -105,147 | -98.87% | Q1 2026 | May 14, 2026 |
| TD Waterhouse Canada Inc. | History | Added to | 808 | 10 | 0.0% | 0.0% | 70 | +8 | 1.0% | Q1 2026 | May 12, 2026 |
| PNC FINANCIAL SERVICES GROUP, INC. | History | Added to | 830 | 9 | 0.0% | 0.0% | 71 | +90 | 12.16% | Q1 2026 | May 08, 2026 |
| GAMMA Investing LLC | History | Added to | 737 | 8 | 0.0% | — | 72 | +635 | 622.55% | Q1 2026 | Apr 06, 2026 |
| Versant Capital Management, Inc | History | New | 691 | 7 | 0.0% | — | 73 | +691 | New | Q1 2026 | Apr 06, 2026 |
| MAI Capital Management | History | Added to | 606 | 6 | 0.0% | — | 74 | +601 | 12020.0% | Q1 2026 | May 15, 2026 |
| Ameritas Investment Partners, Inc. | History | No change | 598 | 6 | 0.0% | 0.0% | 75 | 0 | 0.0% | Q1 2026 | May 13, 2026 |
| Legal & General Group Plc | History | No change | 526 | 5 | 0.0% | 0.0% | 76 | 0 | 0.0% | Q1 2026 | May 08, 2026 |
| EverSource Wealth Advisors, LLC | History | New | 379 | 4 | 0.0% | — | 78 | +379 | New | Q1 2026 | May 15, 2026 |
| DUNCKER STREETT & CO INC | History | No change | 437 | 4 | 0.0% | 0.0% | 77 | 0 | 0.0% | Q1 2026 | Apr 29, 2026 |
| CITIGROUP INC | History | Reduced | 308 | 3 | 0.0% | 0.0% | 79 | -299 | -49.26% | Q1 2026 | May 11, 2026 |
| Allworth Financial LP | History | Added to | 291 | 3 | 0.0% | — | 80 | +290 | 29000.0% | Q1 2026 | May 14, 2026 |
| Advisory Services Network, LLC | History | New | 245 | 2 | 0.0% | — | 83 | +245 | New | Q1 2026 | May 15, 2026 |
| Sterling Capital Management LLC | History | Reduced | 220 | 2 | 0.0% | 0.0% | 82 | -238 | -51.97% | Q1 2026 | Apr 22, 2026 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | History | Added to | 225 | 2 | 0.0% | — | 81 | +134 | 147.25% | Q1 2026 | May 13, 2026 |
| OSAIC HOLDINGS, INC. | History | Reduced | 135 | 1 | 0.0% | 0.0% | 85 | -1,282 | -90.47% | Q1 2026 | May 15, 2026 |
| ROYAL BANK OF CANADA | History | Reduced | 104 | 1 | 0.0% | 0.0% | 84 | -120 | -53.57% | Q1 2026 | May 15, 2026 |
| True Wealth Design, LLC | History | New | 99 | 1 | 0.0% | — | 86 | +99 | New | Q1 2026 | Apr 13, 2026 |
| Graham Capital Management, L.P. | History | Closed out | 0 | 0 | — | 0.01% | — | -40,766 | -100.0% | Q1 2026 | May 15, 2026 |
| AMERICAN CENTURY COMPANIES INC | History | Closed out | 0 | 0 | — | 0.0% | — | -10,590 | -100.0% | Q1 2026 | May 15, 2026 |
| Jain Global LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -10,574 | -100.0% | Q1 2026 | May 15, 2026 |
| GROUP ONE TRADING LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -9,000 | -100.0% | Q1 2026 | May 13, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Closed out | 0 | 0 | — | 0.0% | — | -5,896 | -100.0% | Q1 2026 | May 15, 2026 |
| Steward Partners Investment Advisory, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -1,500 | -100.0% | Q1 2026 | May 08, 2026 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | History | Closed out | 0 | 0 | — | 0.0% | — | -408 | -100.0% | Q1 2026 | May 15, 2026 |
| FEDERATED HERMES, INC. | History | Closed out | 0 | 0 | — | 0.0% | — | -302 | -100.0% | Q1 2026 | May 11, 2026 |
| AMALGAMATED BANK | History | Closed out | 0 | 0 | — | 0.0% | — | -208 | -100.0% | Q1 2026 | May 08, 2026 |
| LOS ANGELES CAPITAL MANAGEMENT LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -110 | -100.0% | Q1 2026 | May 08, 2026 |
| Arax Advisory Partners | History | New | 86 | 0 | — | — | — | +86 | New | Q1 2026 | May 13, 2026 |
| ROTHSCHILD INVESTMENT LLC | History | Added to | 72 | 0 | — | — | — | +66 | 1100.0% | Q1 2026 | May 07, 2026 |
| Root Financial Partners, LLC | History | New | 63 | 0 | — | — | — | +63 | New | Q1 2026 | Apr 24, 2026 |
| Optiver Holding B.V. | History | Reduced | 60 | 0 | — | — | — | -56 | -48.28% | Q1 2026 | May 15, 2026 |
| Farther Finance Advisors, LLC | History | New | 54 | 0 | — | — | — | +54 | New | Q1 2026 | Apr 07, 2026 |
| Wealth Preservation Advisors, LLC | History | New | 44 | 0 | — | — | — | +44 | New | Q1 2026 | May 15, 2026 |
| Bare Financial Services, Inc | History | New | 44 | 0 | — | — | — | +44 | New | Q1 2026 | May 14, 2026 |
| NISA INVESTMENT ADVISORS, LLC | History | New | 40 | 0 | — | — | — | +40 | New | Q1 2026 | Apr 30, 2026 |
| Fortitude Family Office, LLC | History | New | 39 | 0 | — | — | — | +39 | New | Q1 2026 | Apr 15, 2026 |
| SJS Investment Consulting Inc. | History | New | 22 | 0 | — | — | — | +22 | New | Q1 2026 | Apr 23, 2026 |
| Sunbelt Securities, Inc. | History | Added to | 17 | 0 | — | — | — | +16 | 1600.0% | Q1 2026 | May 15, 2026 |
| FIFTH THIRD BANCORP | History | New | 11 | 0 | — | — | — | +11 | New | Q1 2026 | May 01, 2026 |
| IFP Advisors, Inc | History | Added to | 45 | 0 | — | — | — | +5 | 12.5% | Q1 2026 | Apr 13, 2026 |
| JPL Wealth Management, LLC | History | New | 2 | 0 | — | — | — | +2 | New | Q1 2026 | May 08, 2026 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | History | Closed out | 0 | 0 | — | — | — | -2 | -100.0% | Q1 2026 | May 07, 2026 |
| Global Retirement Partners, LLC | History | No change | 35 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 06, 2026 |
| SBI Securities Co., Ltd. | History | No change | 1 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | Apr 27, 2026 |
| Keating Financial Advisory Services, Inc. | History | No change | 63 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 15, 2026 |