KORRO BIO INC (KRRO)
Institutional ownership reported to the SEC as of Q2 2026, across 11 quarters.
107
Reporting holders
$221.1M
Reported value
112.9%
Of shares outstanding
0.9%
Held as options
+8
Holder change
Institutions report 16,629,136 shares against 14,725,646 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. Over 100% because an adviser and a sub-adviser can both report the same shares, and both are counted.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| Lynx1 Capital Management LP | $40.5M | 3,076,592 | 2.95% | 3q | +100.0%+$20.3M |
| Nantahala Capital Management, LLC | $17.4M | 1,320,072 | 0.29% | 3q | +100.0%+$8.7M |
| NEA Management Company, LLC | $17.1M | 1,297,893 | 1.08% | 11q | HELD |
| Venrock Adviser, LLC | $13.3M | 1,009,500 | 0.40% | 2q | HELD |
| Atlas Venture Life Science Advisors, LLC | $12.7M | 962,884 | 1.44% | 11q | -15.3%-$2.3M |
| Balyasny Asset Management L.P. | $12.5M | 951,783 | 0.02% | 2q | -8.5%-$1.2M |
| BlackRock, Inc. | $10.8M | 817,621 | 0.00% | 8q | +77.7%+$4.7M |
| Affinity Asset Advisors, LLC | $9.3M | 706,904 | 0.42% | 2q | HELD |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | $7.1M | 540,968 | 0.01% | 2q | +136.9%+$4.1M |
| ADAR1 Capital Management, LLC | $7.1M | 540,054 | 0.33% | 2q | HELD |
| VANGUARD CAPITAL MANAGEMENT LLC | $6.0M | 454,778 | 0.00% | 2q | +46.3%+$1.9M |
| Driehaus Capital Management LLC | $5.9M | 450,045 | 0.03% | 2q | HELD |
| TCG Crossover Management, LLC | $5.5M | 416,301 | 0.13% | 4q | HELD |
| Kalehua Capital Management LLC | $5.3M | 405,040 | 1.70% | 2q | +270.3%+$3.9M |
| Siren, L.L.C. | $4.6M | 347,718 | 0.09% | 8q | HELD |
| AQR CAPITAL MANAGEMENT LLC | $3.9M | 298,974 | 0.00% | 4q | +11.7%+$411.5K |
| GEODE CAPITAL MANAGEMENT, LLC | $3.9M | 296,870 | 0.00% | 11q | +71.0%+$1.6M |
| 72 Investment Holdings, LLC | $3.6M | 276,831 | 7.30% | 11q | HELD |
| STATE STREET CORP | $3.1M | 232,587 | 0.00% | 11q | +65.7%+$1.2M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $2.9M | 223,551 | 0.00% | 2q | +50.5%+$988.4K |
| TWO SIGMA INVESTMENTS, LP | $2.3M | 178,071 | 0.00% | 5q | +7.6%+$166.1K |
| JPMORGAN CHASE & CO | $1.6M | 124,726 | 0.00% | 11q | +82.1%+$741.9K |
| CITADEL ADVISORS LLC | $1.6M | 40,390 | 0.00% | 11q | +30.7%+$382.8K |
| MILLENNIUM MANAGEMENT LLC | $1.6M | 118,434 | 0.00% | 10q | +86.2%+$722.6K |
| GOLDMAN SACHS GROUP INC | $1.5M | 116,983 | 0.00% | 4q | +131.5%+$875.7K |
| RENAISSANCE TECHNOLOGIES LLC | $1.5M | 110,524 | 0.00% | 5q | -18.9%-$338.8K |
| UBS Group AG | $1.4M | 105,453 | 0.00% | 11q | +386.5%+$1.1M |
| NORTHERN TRUST CORP | $1.2M | 88,089 | 0.00% | 11q | +52.7%+$400.5K |
| VANGUARD FIDUCIARY TRUST CO | $987.2K | 74,901 | 0.00% | 2q | +80.3%+$439.7K |
| EMERALD MUTUAL FUND ADVISERS TRUST | $837.7K | 63,562 | 0.03% | 4q | +1.1%+$9.3K |
| F/m Investments LLC | $837.7K | 63,562 | 0.04% | 4q | +1.1%+$9.3K |
| Walleye Capital LLC | $715.5K | 54,289 | 0.00% | new | NEW |
| Quantinno Capital Management LP | $694.9K | 52,720 | 0.00% | 4q | +46.5%+$220.7K |
| BANK OF AMERICA CORP /DE/ | $681.5K | 51,707 | 0.00% | new | NEW |
| RAYMOND JAMES FINANCIAL INC | $644.8K | 48,920 | 0.00% | 7q | +14.2%+$80.2K |
| XTX Topco Ltd | $630.3K | 47,819 | 0.01% | 3q | -20.9%-$166.8K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $623.4K | options only | 0.00% | 3q | OPTIONS |
| FMR LLC | $513.7K | 38,975 | 0.00% | 11q | HELD |
| BOOTHBAY FUND MANAGEMENT, LLC | $472.5K | 35,853 | 0.01% | 2q | -14.6%-$81.0K |
| D. E. Shaw & Co., Inc. | $450.9K | 34,213 | 0.00% | new | NEW |
| Jump Financial, LLC | $446.9K | 33,906 | 0.00% | new | NEW |
| Bank of New York Mellon Corp | $418.2K | 31,730 | 0.00% | 9q | +46.0%+$131.8K |
| AIHC Capital Management Ltd | $398.9K | 30,265 | 0.38% | 3q | HELD |
| Mariner, LLC | $367.8K | 27,908 | 0.00% | 2q | +8.1%+$27.5K |
| BNP PARIBAS FINANCIAL MARKETS | $346.0K | 26,254 | 0.00% | 9q | +1015.3%+$315.0K |
| MERCER GLOBAL ADVISORS INC /ADV | $339.7K | 25,776 | 0.00% | new | NEW |
| PANAGORA ASSET MANAGEMENT INC | $337.0K | 25,572 | 0.00% | new | NEW |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $317.8K | 24,110 | 0.00% | 10q | +80.0%+$141.2K |
| Sixth Street Partners Management Company, L.P. | $317.8K | 24,110 | 0.00% | new | NEW |
| MORGAN STANLEY | $296.6K | 22,501 | 0.00% | 11q | -45.3%-$245.4K |
| IEQ CAPITAL, LLC | $280.0K | 21,246 | 0.00% | 2q | +66.3%+$111.6K |
| MARSHALL WACE, LLP | $251.2K | 19,060 | 0.00% | 3q | -44.5%-$201.4K |
| GUGGENHEIM CAPITAL LLC | $242.5K | 18,400 | 0.00% | 3q | +30.5%+$56.7K |
| HSBC HOLDINGS PLC | $232.8K | 17,812 | 0.00% | new | NEW |
| DEUTSCHE BANK AG\ | $210.2K | 15,948 | 0.00% | 8q | +51.3%+$71.2K |
| Nuveen, LLC | $209.0K | 15,861 | 0.00% | new | NEW |
| SIMPLEX TRADING, LLC | $188.1K | 1,975 | 0.00% | 3q | HELD |
| ALGERT GLOBAL LLC | $187.3K | 14,212 | 0.00% | 4q | -63.0%-$318.4K |
| Susquehanna Portfolio Strategies, LLC | $177.9K | 13,500 | 0.00% | 2q | -29.4%-$74.1K |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | $167.6K | 11,508 | 0.00% | new | NEW |
| RHUMBLINE ADVISERS | $163.4K | 12,401 | 0.00% | 9q | +25.9%+$33.6K |
| Trexquant Investment LP | $151.3K | 11,482 | 0.00% | 2q | -79.6%-$589.5K |
| DIMENSIONAL FUND ADVISORS LP | $150.3K | 11,406 | 0.00% | new | NEW |
| Cerity Partners LLC | $142.3K | 10,794 | 0.00% | new | NEW |
| ALLIANCEBERNSTEIN L.P. | $137.9K | 12,180 | 0.00% | new | NEW |
| Engineers Gate Manager LP | $134.7K | 10,217 | 0.00% | 3q | -56.9%-$177.7K |
| AMERICAN CENTURY COMPANIES INC | $133.8K | 10,153 | 0.00% | new | NEW |
| WELLS FARGO & COMPANY/MN | $126.1K | 9,564 | 0.00% | 11q | +84.7%+$57.8K |
| Arax Advisory Partners | $73.7K | 5,595 | 0.00% | 2q | +6405.8%+$72.6K |
| CITIGROUP INC | $68.1K | 5,169 | 0.00% | 11q | +1578.2%+$64.1K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $67.6K | 5,130 | 0.00% | 8q | +59.6%+$25.3K |
| Russell Investments Group, Ltd. | $65.1K | 4,939 | 0.00% | 4q | +133.5%+$37.2K |
| Police & Firemen's Retirement System of New Jersey | $61.0K | 4,627 | 0.00% | 7q | +237.0%+$42.9K |
| NEW YORK STATE COMMON RETIREMENT FUND | $39.5K | 3,000 | 0.00% | 9q | HELD |
| Vanguard Global Advisers, LLC | $25.4K | 1,929 | 0.00% | 2q | HELD |
| North Star Investment Management Corp. | $23.7K | 1,800 | 0.00% | 11q | HELD |
| Tower Research Capital LLC (TRC) | $20.9K | 1,587 | 0.00% | 8q | -3.5% |
| Integrated Wealth Concepts LLC | $20.9K | 1,585 | 0.00% | new | NEW |
| Legal & General Group Plc | $14.3K | 1,082 | 0.00% | 9q | +105.7%+$7.3K |
| GAMMA Investing LLC | $11.3K | 861 | 0.00% | 8q | +16.8%+$1.6K |
| TD Waterhouse Canada Inc. | $11.0K | 808 | 0.00% | 3q | HELD |
| GROUP ONE TRADING LLC | $7.9K | options only | 0.00% | 3q | OPTIONS |
| Ameritas Investment Partners, Inc. | $7.9K | 598 | 0.00% | 9q | HELD |
| Versant Capital Management, Inc | $7.1K | 539 | 0.00% | 2q | -22.0%-$2.0K |
| Allworth Financial LP | $7.1K | 538 | 0.00% | 4q | +84.9%+$3.3K |
| EverSource Wealth Advisors, LLC | $6.6K | 498 | 0.00% | 2q | +31.4%+$1.6K |
| DUNCKER STREETT & CO INC | $5.8K | 437 | 0.00% | 11q | HELD |
| IFP Advisors, Inc | $5.5K | 418 | 0.00% | 5q | +828.9%+$4.9K |
| ROYAL BANK OF CANADA | $4.0K | 352 | 0.00% | 11q | +618.4%+$3.4K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $3.0K | 225 | 0.00% | 3q | HELD |
| PNC Financial Services Group, Inc. | $2.5K | 193 | 0.00% | 4q | -76.7%-$8.4K |
| True Wealth Design, LLC | $2.5K | 192 | 0.00% | 2q | +93.9%+$1.2K |
| Sterling Capital Management LLC | $2.5K | 191 | 0.00% | 8q | -13.2% |
| Essential Partners LLC | $2.4K | 180 | 0.00% | 2q | -86.4%-$15.0K |
| OSAIC HOLDINGS, INC. | $1.8K | 134 | 0.00% | 11q | -0.7% |
| ROTHSCHILD INVESTMENT LLC | $1.6K | 123 | 0.00% | 3q | +70.8% |
| Farther Finance Advisors, LLC | $1.5K | 115 | 0.00% | 2q | +113.0% |
| Optiver Holding B.V. | $791 | 60 | 0.00% | 4q | HELD |
| Basecamp Wealth Advisors LLC | $593 | 45 | 0.00% | new | FIRST |
| Timbuktu Capital Management, LLC | $501 | 38 | 0.00% | new | FIRST |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-14 | 13G/A | BALYASNY ASSET MANAGEMENT L.P.with 4 co-filers | 6.6% |
| 2026-08-04 | 13D/A | Atlas Venture Fund XI, L.P.with 5 co-filers | 4.9% |
| 2026-07-29 | 13G | BlackRock, Inc. | 5.2% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 107 | $221.1M | 16,629,136 | 18 | 47 | 18 | 0.9% |
| Q1 2026 | 99 | $149.8M | 12,770,806 | 27 | 32 | 21 | 3.7% |
| Q4 2025 | 80 | $68.4M | 7,554,742 | 24 | 22 | 19 | 11.8% |
| Q3 2025 | 89 | $474.9M | 9,924,035 | 25 | 27 | 20 | 0.0% |
| Q2 2025 | 69 | $114.9M | 9,057,391 | 10 | 24 | 11 | 0.0% |
| Q1 2025 | 73 | $169.0M | 9,704,650 | 9 | 20 | 22 | 0.0% |
| Q4 2024 | 81 | $359.4M | 9,441,112 | 19 | 33 | 10 | 0.0% |
| Q3 2024 | 66 | $284.0M | 8,498,379 | 12 | 20 | 12 | 0.0% |
| Q2 2024 | 60 | $282.8M | 8,350,525 | 22 | 15 | 12 | 0.0% |
| Q1 2024 | 45 | $616.6M | 6,887,165 | 11 | 10 | 8 | 0.0% |
| Q4 2023 | 35 | $281.0M | 6,136,283 | 35 | 0 | 0 | 0.0% |