KRRO Korro Bio, Inc.
Korro Bio, Inc. (KRRO) Institutional Ownership
What the institutions did with KRRO last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| Lynx1 Capital Management LP | 1.5M | 10.2% |
| Nantahala Capital Management, LLC | 1.3M | 8.8% |
| NEA Management Company, LLC | 1.3M | 8.6% |
| Venrock Adviser, LLC | 1.0M | 6.7% |
| Atlas Venture Life Science Advisors, LLC | 962.9K | 6.4% |
| Balyasny Asset Management L.P. | 951.8K | 6.3% |
| BlackRock, Inc. | 817.6K | 5.4% |
| Affinity Asset Advisors, LLC | 706.9K | 4.7% |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 541.0K | 3.6% |
| ADAR1 Capital Management, LLC | 540.1K | 3.6% |
| VANGUARD CAPITAL MANAGEMENT LLC | 454.8K | 3.0% |
| Driehaus Capital Management LLC | 450.0K | 3.0% |
| TCG Crossover Management, LLC | 416.3K | 2.8% |
| Kalehua Capital Management LLC | 405.0K | 2.7% |
| Siren, L.L.C. | 347.7K | 2.3% |
| AQR CAPITAL MANAGEMENT LLC | 299.0K | 2.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 296.9K | 2.0% |
| 72 Investment Holdings, LLC | 276.8K | 1.8% |
| STATE STREET CORP | 232.6K | 1.5% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 223.6K | 1.5% |
| TWO SIGMA INVESTMENTS, LP | 178.1K | 1.2% |
| JPMORGAN CHASE & CO | 124.7K | 0.8% |
| MILLENNIUM MANAGEMENT LLC | 118.4K | 0.8% |
| GOLDMAN SACHS GROUP INC | 117.0K | 0.8% |
| RENAISSANCE TECHNOLOGIES LLC | 110.5K | 0.7% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Nantahala Capital Management, LLC | Increased | 660.0K | 1.3M | +660.0K |
| BlackRock, Inc. | Increased | 460.0K | 817.6K | +357.6K |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | Increased | 228.4K | 541.0K | +312.6K |
| Kalehua Capital Management LLC | Increased | 109.4K | 405.0K | +295.7K |
| Atlas Venture Life Science Advisors, LLC | Reduced | 1.1M | 962.9K | -174.3K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 310.9K | 454.8K | +143.9K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 173.6K | 296.9K | +123.2K |
| JANE STREET GROUP, LLC | Sold Out | 115.7K | 0 | -115.7K |
| STATE STREET CORP | Increased | 140.3K | 232.6K | +92.2K |
| Balyasny Asset Management L.P. | Reduced | 1.0M | 951.8K | -88.3K |
| UBS Group AG | Increased | 21.7K | 105.5K | +83.8K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 148.6K | 223.6K | +75.0K |
| GOLDMAN SACHS GROUP INC | Increased | 50.5K | 117.0K | +66.4K |
| JPMORGAN CHASE & CO | Increased | 68.5K | 124.7K | +56.2K |
| MILLENNIUM MANAGEMENT LLC | Increased | 63.6K | 118.4K | +54.8K |
| Walleye Capital LLC | New | 0 | 54.3K | +54.3K |
| BANK OF AMERICA CORP /DE/ | New | 0 | 51.7K | +51.7K |
| Trexquant Investment LP | Reduced | 56.2K | 11.5K | -44.7K |
| D. E. Shaw & Co., Inc. | New | 0 | 34.2K | +34.2K |
| Jump Financial, LLC | New | 0 | 33.9K | +33.9K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 41.5K | 74.9K | +33.4K |
| AQR CAPITAL MANAGEMENT LLC | Increased | 267.8K | 299.0K | +31.2K |
| NORTHERN TRUST CORP | Increased | 57.7K | 88.1K | +30.4K |
| ACADIAN ASSET MANAGEMENT LLC | Reduced | 41.8K | 14.5K | -27.3K |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | 136.2K | 110.5K | -25.7K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.