Who owns Korro Bio, Inc.?
Institutional ownership of KRRO from SEC Form 13F filings across 74 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
74
13F holders
$69.5M
value, 2026 filers
53.3%
of shares outstanding (5.3M sh)
17
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of KRRO's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | Balyasny Asset Management L.P. | 951,783 | $12.5M | 0.0% | 9.6% | -8.5% |
| 2 | BlackRock, Inc. | 817,621 | $10.8M | 0.0% | 8.2% | +77.7% |
| 3 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 540,968 | $7.1M | 0.0% | 5.4% | +136.9% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 454,778 | $6.0M | 0.0% | 4.6% | -26.9% |
| 5 | TCG Crossover Management, LLC | 416,301 | $5.5M | 0.1% | 4.2% | 0.0% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 296,870 | $3.9M | 0.0% | 3% | +71.0% |
| 7 | VANGUARD PORTFOLIO MANAGEMENT LLC | 223,551 | $2.9M | 0.0% | 2.2% | +50.5% |
| 8 | TWO SIGMA INVESTMENTS, LP | 178,071 | $2.3M | 0.0% | 1.8% | +7.6% |
| 9 | JPMORGAN CHASE & CO | 124,726 | $1.6M | 0.0% | 1.3% | +82.1% |
| 10 | MILLENNIUM MANAGEMENT LLC | 118,434 | $1.6M | 0.0% | 1.2% | +86.2% |
| 11 | GOLDMAN SACHS GROUP INC | 116,983 | $1.5M | 0.0% | 1.2% | +131.5% |
| 12 | UBS Group AG | 105,453 | $1.4M | 0.0% | 1.1% | +386.5% |
| 13 | NORTHERN TRUST CORP | 88,089 | $1.2M | 0.0% | 0.9% | +52.7% |
| 14 | VANGUARD FIDUCIARY TRUST CO | 74,901 | $987,195 | 0.0% | 0.8% | +80.3% |
| 15 | Walleye Capital LLCNEW | 54,289 | $715,529 | 0.0% | 0.5% | new |
| 16 | Quantinno Capital Management LP | 52,720 | $694,850 | 0.0% | 0.5% | +46.5% |
| 17 | BANK OF AMERICA CORP /DE/NEW | 51,707 | $681,498 | 0.0% | 0.5% | new |
| 18 | RAYMOND JAMES FINANCIAL INC | 48,920 | $644,765 | 0.0% | 0.5% | +14.2% |
| 19 | CITADEL ADVISORS LLC | 40,390 | $532,340 | 0.0% | 0.4% | +30.7% |
| 20 | FMR LLC | 38,975 | $513,691 | 0.0% | 0.4% | +0.2% |
| 21 | BOOTHBAY FUND MANAGEMENT, LLC | 35,853 | $472,543 | 0.0% | 0.4% | -14.6% |
| 22 | D. E. Shaw & Co., Inc.NEW | 34,213 | $450,927 | 0.0% | 0.3% | new |
| 23 | Jump Financial, LLCNEW | 33,906 | $446,881 | 0.0% | 0.3% | new |
| 24 | Bank of New York Mellon Corp | 31,730 | $418,196 | 0.0% | 0.3% | +46.0% |
| 25 | Mariner, LLC | 27,908 | $367,824 | 0.0% | 0.3% | +8.1% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.