Korro Bio, Inc. - KRRO
Detailed investor-level table based on 13F positions.
Early Q1 2026 data: only 3 institutional holders reported so far. The full shareholder list will grow as more funds file with the SEC.
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Atlas Venture Life Science Advisors, LLC | History | No change | 1,137,149 | 9,108 | 1.05% | 7.24% | 1 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| NEA Management Company, LLC | History | No change | 1,090,793 | 8,737 | 0.45% | 2.87% | 2 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Lynx1 Capital Management LP | History | New | 677,915 | 5,430 | 1.1% | — | 3 | +677,915 | New | Q4 2025 | Feb 17, 2026 |
| JANE STREET GROUP, LLC | History | New | 604,357 | 4,840 | 0.0% | — | 4 | +604,357 | New | Q4 2025 | Feb 12, 2026 |
| Nantahala Capital Management, LLC | History | New | 600,000 | 4,806 | 0.16% | — | 5 | +600,000 | New | Q4 2025 | Feb 13, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | New | 509,027 | 4,077 | 0.0% | — | 6 | +509,027 | New | Q4 2025 | Feb 17, 2026 |
| VANGUARD GROUP INC | History | Added to | 489,639 | 3,922 | 0.0% | 0.0% | 7 | +93,980 | 23.75% | Q4 2025 | Jan 29, 2026 |
| BlackRock, Inc. | History | Added to | 457,399 | 3,663 | 0.0% | 0.0% | 8 | +10,701 | 2.4% | Q4 2025 | Feb 12, 2026 |
| TCG Crossover Management, LLC | History | No change | 416,301 | 3,334 | 0.11% | 0.98% | 9 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| CITADEL ADVISORS LLC | History | Added to | 352,029 | 2,819 | 0.0% | 0.0% | 10 | +198,101 | 128.7% | Q4 2025 | Feb 17, 2026 |
| Siren, L.L.C. | History | Reduced | 347,718 | 2,785 | 0.08% | 0.78% | 11 | -71,115 | -16.98% | Q4 2025 | Feb 13, 2026 |
| 72 Investment Holdings, LLC | History | No change | 276,831 | 2,217 | 4.38% | 19.51% | 12 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Reduced | 162,760 | 1,303 | 0.0% | 0.0% | 13 | -172 | -0.11% | Q4 2025 | Feb 09, 2026 |
| MILLENNIUM MANAGEMENT LLC | History | Reduced | 161,092 | 1,290 | 0.0% | 0.01% | 14 | -99,241 | -38.12% | Q4 2025 | Feb 17, 2026 |
| STATE STREET CORP | History | Added to | 146,221 | 1,171 | 0.0% | 0.0% | 15 | +21,652 | 17.38% | Q4 2025 | Feb 13, 2026 |
| SIMPLEX TRADING, LLC | History | New | 106,347 | 851 | 0.0% | — | 16 | +106,347 | New | Q4 2025 | Feb 11, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | Added to | 78,984 | 632 | 0.0% | 0.0% | 17 | +14,529 | 22.54% | Q4 2025 | Feb 17, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Added to | 74,900 | 599 | 0.0% | 0.0% | 18 | +34,500 | 85.4% | Q4 2025 | Feb 12, 2026 |
| MORGAN STANLEY | History | Reduced | 69,728 | 558 | 0.0% | 0.0% | 19 | -97,766 | -58.37% | Q4 2025 | Feb 13, 2026 |
| F/m Investments LLC | History | Added to | 65,548 | 525 | 0.02% | 0.1% | 21 | +10,303 | 18.65% | Q4 2025 | Feb 03, 2026 |
| EMERALD MUTUAL FUND ADVISERS TRUST | History | Added to | 65,548 | 525 | 0.03% | 0.15% | 20 | +6,637 | 11.27% | Q4 2025 | Feb 09, 2026 |
| XTX Topco Ltd | History | Added to | 57,067 | 457 | 0.01% | — | 22 | +13,529 | 31.07% | Q4 2025 | Feb 17, 2026 |
| NORTHERN TRUST CORP | History | Reduced | 55,640 | 445 | 0.0% | 0.0% | 23 | -1,633 | -2.85% | Q4 2025 | Feb 17, 2026 |
| GOLDMAN SACHS GROUP INC | History | Added to | 51,950 | 416 | 0.0% | 0.0% | 24 | +36,269 | 231.29% | Q4 2025 | Mar 25, 2026 |
| Graham Capital Management, L.P. | History | New | 40,766 | 326 | 0.01% | — | 25 | +40,766 | New | Q4 2025 | Feb 17, 2026 |
| AQR CAPITAL MANAGEMENT LLC | History | Reduced | 40,647 | 325 | 0.0% | 0.0% | 26 | -7,760 | -16.03% | Q4 2025 | Feb 17, 2026 |
| FMR LLC | History | Reduced | 37,857 | 303 | 0.0% | 0.0% | 27 | -525,824 | -93.28% | Q4 2025 | Feb 17, 2026 |
| ACADIAN ASSET MANAGEMENT LLC | History | New | 33,790 | 270 | 0.0% | — | 28 | +33,790 | New | Q4 2025 | Feb 10, 2026 |
| AIHC Capital Management Ltd | History | New | 30,265 | 242 | 0.23% | — | 29 | +30,265 | New | Q4 2025 | Feb 05, 2026 |
| Quantinno Capital Management LP | History | Added to | 27,597 | 221 | 0.0% | 0.0% | 30 | +21,454 | 349.24% | Q4 2025 | Feb 17, 2026 |
| ALGERT GLOBAL LLC | History | Added to | 27,065 | 217 | 0.0% | 0.01% | 31 | +19,957 | 280.77% | Q4 2025 | Feb 17, 2026 |
| Quadrature Capital Ltd | History | New | 27,064 | 216 | 0.0% | — | 32 | +27,064 | New | Q4 2025 | Feb 17, 2026 |
| Engineers Gate Manager LP | History | New | 26,885 | 215 | 0.0% | — | 33 | +26,885 | New | Q4 2025 | Feb 17, 2026 |
| RAYMOND JAMES FINANCIAL INC | History | Reduced | 23,031 | 184 | 0.0% | 0.0% | 34 | -125,940 | -84.54% | Q4 2025 | Feb 18, 2026 |
| UBS Group AG | History | Reduced | 19,995 | 160 | 0.0% | 0.0% | 35 | -33,108 | -62.35% | Q4 2025 | Jan 29, 2026 |
| MARSHALL WACE, LLP | History | New | 19,772 | 158 | 0.0% | — | 36 | +19,772 | New | Q4 2025 | Feb 13, 2026 |
| Bank of New York Mellon Corp | History | Reduced | 18,855 | 151 | 0.0% | 0.0% | 37 | -458 | -2.37% | Q4 2025 | Feb 10, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | History | Reduced | 16,329 | 130 | 0.0% | 0.0% | 38 | -6,772 | -29.31% | Q4 2025 | Feb 13, 2026 |
| DEUTSCHE BANK AG\ | History | Added to | 12,758 | 102 | 0.0% | 0.0% | 39 | +9,027 | 241.95% | Q4 2025 | Feb 11, 2026 |
| TWO SIGMA ADVISERS, LP | History | Reduced | 11,237 | 90 | 0.0% | 0.0% | 40 | -172 | -1.51% | Q4 2025 | Feb 17, 2026 |
| Jain Global LLC | History | New | 10,574 | 84 | 0.0% | — | 42 | +10,574 | New | Q4 2025 | Feb 17, 2026 |
| AMERICAN CENTURY COMPANIES INC | History | Added to | 10,590 | 84 | 0.0% | 0.0% | 41 | +1,833 | 20.93% | Q4 2025 | Feb 13, 2026 |
| GUGGENHEIM CAPITAL LLC | History | New | 10,439 | 83 | 0.0% | — | 43 | +10,439 | New | Q4 2025 | Feb 17, 2026 |
| RHUMBLINE ADVISERS | History | Added to | 10,250 | 82 | 0.0% | 0.0% | 44 | +907 | 9.71% | Q4 2025 | Feb 13, 2026 |
| GROUP ONE TRADING LLC | History | New | 9,000 | 72 | 0.0% | — | 45 | +9,000 | New | Q4 2025 | Feb 12, 2026 |
| AlphaQuest LLC | History | Added to | 7,703 | 61 | 0.0% | 0.01% | 46 | +5,235 | 212.12% | Q4 2025 | Feb 09, 2026 |
| WELLS FARGO & COMPANY/MN | History | Added to | 7,522 | 60 | 0.0% | 0.0% | 47 | +2,352 | 45.49% | Q4 2025 | Feb 13, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Added to | 5,896 | 47 | 0.0% | 0.0% | 48 | +1,192 | 25.34% | Q4 2025 | Feb 17, 2026 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | History | Added to | 3,146 | 25 | 0.0% | 0.0% | 49 | +8 | 0.25% | Q4 2025 | Feb 17, 2026 |
| NEW YORK STATE COMMON RETIREMENT FUND | History | No change | 3,000 | 24 | 0.0% | 0.0% | 50 | 0 | 0.0% | Q4 2025 | Feb 12, 2026 |
| JPMORGAN CHASE & CO | History | Reduced | 2,838 | 22 | 0.0% | 0.0% | 51 | -196,411 | -98.58% | Q4 2025 | Feb 11, 2026 |
| Russell Investments Group, Ltd. | History | Added to | 1,930 | 15 | 0.0% | 0.0% | 52 | +1,115 | 136.81% | Q4 2025 | Feb 17, 2026 |
| North Star Investment Management Corp. | History | No change | 1,800 | 14 | 0.0% | 0.01% | 53 | 0 | 0.0% | Q4 2025 | Jan 30, 2026 |
| Steward Partners Investment Advisory, LLC | History | Reduced | 1,500 | 12 | 0.0% | 0.0% | 54 | -250 | -14.29% | Q4 2025 | Feb 12, 2026 |
| OSAIC HOLDINGS, INC. | History | Added to | 1,417 | 11 | 0.0% | 0.0% | 57 | +1,137 | 406.07% | Q4 2025 | Feb 17, 2026 |
| Tower Research Capital LLC (TRC) | History | Added to | 1,391 | 11 | 0.0% | 0.0% | 56 | +353 | 34.01% | Q4 2025 | Feb 17, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | Added to | 1,487 | 11 | 0.0% | 0.0% | 55 | +173 | 13.17% | Q4 2025 | Feb 10, 2026 |
| Police & Firemen's Retirement System of New Jersey | History | Reduced | 1,373 | 10 | 0.0% | 0.0% | 58 | -913 | -39.94% | Q4 2025 | Feb 13, 2026 |
| TD Waterhouse Canada Inc. | History | New | 800 | 6 | 0.0% | — | 59 | +800 | New | Q4 2025 | Jan 27, 2026 |
| PNC FINANCIAL SERVICES GROUP, INC. | History | Reduced | 740 | 5 | 0.0% | 0.0% | 60 | -2,174 | -74.61% | Q4 2025 | Feb 06, 2026 |
| CITIGROUP INC | History | Added to | 607 | 4 | 0.0% | 0.0% | 62 | +270 | 80.12% | Q4 2025 | Feb 13, 2026 |
| LOS ANGELES CAPITAL MANAGEMENT LLC | History | New | 110 | 4 | 0.0% | — | 64 | +110 | New | Q4 2025 | Feb 11, 2026 |
| Legal & General Group Plc | History | No change | 526 | 4 | 0.0% | 0.0% | 61 | 0 | 0.0% | Q4 2025 | Feb 09, 2026 |
| Ameritas Investment Partners, Inc. | History | No change | 598 | 4 | 0.0% | 0.0% | 63 | 0 | 0.0% | Q4 2025 | Feb 11, 2026 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | History | Reduced | 408 | 3 | 0.0% | 0.0% | 66 | -8 | -1.92% | Q4 2025 | Feb 17, 2026 |
| DUNCKER STREETT & CO INC | History | No change | 437 | 3 | 0.0% | 0.0% | 65 | 0 | 0.0% | Q4 2025 | Jan 27, 2026 |
| Sterling Capital Management LLC | History | No change | 458 | 3 | 0.0% | 0.0% | 67 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| CWM, LLC | History | Reduced | 288 | 2 | 0.0% | 0.0% | 71 | -2,405 | -89.31% | Q4 2025 | Jan 26, 2026 |
| FEDERATED HERMES, INC. | History | New | 302 | 2 | 0.0% | — | 70 | +302 | New | Q4 2025 | Feb 12, 2026 |
| ROYAL BANK OF CANADA | History | New | 224 | 2 | 0.0% | — | 69 | +224 | New | Q4 2025 | Feb 17, 2026 |
| AMALGAMATED BANK | History | Reduced | 208 | 2 | 0.0% | 0.0% | 68 | -3 | -1.42% | Q4 2025 | Feb 05, 2026 |
| DRIEHAUS CAPITAL MANAGEMENT LLC | History | Closed out | 0 | 0 | — | 0.23% | — | -671,981 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Point72 Asset Management, L.P. | History | Closed out | 0 | 0 | — | 0.04% | — | -531,969 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Cormorant Asset Management, LP | History | Closed out | 0 | 0 | — | 1.54% | — | -465,000 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Tri Locum Partners LP | History | Closed out | 0 | 0 | — | 3.72% | — | -337,764 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Blue Owl Capital Holdings LP | History | Closed out | 0 | 0 | — | 1.56% | — | -105,000 | -100.0% | Q3 2025 | Nov 12, 2025 |
| Schonfeld Strategic Advisors LLC | History | Closed out | 0 | 0 | — | 0.02% | — | -90,186 | -100.0% | Q3 2025 | Nov 14, 2025 |
| DAFNA Capital Management LLC | History | Closed out | 0 | 0 | — | 0.72% | — | -60,804 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Aberdeen Group plc | History | Closed out | 0 | 0 | — | 0.0% | — | -57,983 | -100.0% | Q3 2025 | Nov 07, 2025 |
| Woodline Partners LP | History | Closed out | 0 | 0 | — | 0.01% | — | -50,094 | -100.0% | Q3 2025 | Nov 14, 2025 |
| ADAR1 Capital Management, LLC | History | Closed out | 0 | 0 | — | 0.18% | — | -40,235 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Trexquant Investment LP | History | Closed out | 0 | 0 | — | 0.02% | — | -38,260 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Rock Springs Capital Management LP | History | Closed out | 0 | 0 | — | 0.1% | — | -35,719 | -100.0% | Q3 2025 | Nov 14, 2025 |
| ORBIMED ADVISORS LLC | History | Closed out | 0 | 0 | — | 0.04% | — | -32,400 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Eversept Partners, LP | History | Closed out | 0 | 0 | — | 0.07% | — | -20,856 | -100.0% | Q3 2025 | Nov 14, 2025 |
| EMERALD ADVISERS, LLC | History | Closed out | 0 | 0 | — | 0.03% | — | -16,469 | -100.0% | Q3 2025 | Oct 30, 2025 |
| BLAIR WILLIAM & CO/IL | History | Closed out | 0 | 0 | — | 0.0% | — | -9,750 | -100.0% | Q3 2025 | Nov 12, 2025 |
| Nuveen, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -9,264 | -100.0% | Q3 2025 | Nov 12, 2025 |
| ALLIANCEBERNSTEIN L.P. | History | Closed out | 0 | 0 | — | 0.0% | — | -7,700 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Wealth Forward, LLC | History | Closed out | 0 | 0 | — | 0.14% | — | -5,009 | -100.0% | Q3 2025 | Nov 06, 2025 |
| Quarry LP | History | Closed out | 0 | 0 | — | 0.05% | — | -4,375 | -100.0% | Q3 2025 | Nov 14, 2025 |
| MetLife Investment Management, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -3,945 | -100.0% | Q3 2025 | Nov 13, 2025 |
| Arax Advisory Partners | History | Closed out | 0 | 0 | — | 0.0% | — | -3,610 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Versant Capital Management, Inc | History | Closed out | 0 | 0 | — | 0.0% | — | -271 | -100.0% | Q3 2025 | Oct 27, 2025 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | History | New | 91 | 0 | — | — | — | +91 | New | Q4 2025 | Feb 13, 2026 |
| EverSource Wealth Advisors, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -89 | -100.0% | Q3 2025 | Nov 10, 2025 |
| NISA INVESTMENT ADVISORS, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -83 | -100.0% | Q3 2025 | Oct 23, 2025 |
| Wealthspire Advisors, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -65 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Keating Financial Advisory Services, Inc. | History | New | 63 | 0 | — | — | — | +63 | New | Q4 2025 | Feb 09, 2026 |
| Global Retirement Partners, LLC | History | New | 35 | 0 | — | — | — | +35 | New | Q4 2025 | Feb 06, 2026 |
| True Wealth Design, LLC | History | Closed out | 0 | 0 | — | — | — | -19 | -100.0% | Q3 2025 | Oct 21, 2025 |
| Clearstead Advisors, LLC | History | Closed out | 0 | 0 | — | — | — | -18 | -100.0% | Q3 2025 | Nov 10, 2025 |
| GAMMA Investing LLC | History | Added to | 102 | 0 | — | 0.0% | — | +13 | 14.61% | Q4 2025 | Jan 05, 2026 |
| ROTHSCHILD INVESTMENT LLC | History | New | 6 | 0 | — | — | — | +6 | New | Q4 2025 | Feb 10, 2026 |
| Allworth Financial LP | History | New | 1 | 0 | — | — | — | +1 | New | Q4 2025 | Feb 05, 2026 |
| Sunbelt Securities, Inc. | History | New | 1 | 0 | — | — | — | +1 | New | Q4 2025 | Feb 20, 2026 |
| MAI Capital Management | History | No change | 5 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | History | No change | 2 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 10, 2026 |
| IFP Advisors, Inc | History | No change | 40 | 0 | — | 0.0% | — | 0 | 0.0% | Q4 2025 | Feb 06, 2026 |
| SBI Securities Co., Ltd. | History | No change | 1 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 03, 2026 |
| Optiver Holding B.V. | History | No change | 116 | 0 | — | 0.0% | — | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |