Korro Bio, Inc. (KRRO) — Institutional Holders, Q2 2026
106 institutional investment managers reported a KRRO position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $184.8M. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
KRRO in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- BlackRockAdded · +357,615 sh+$4.7M
- ADAGE CAPITAL PARTNERS GP, L.L.C.Added · +312,568 sh+$4.1M
- VANGUARD CAPITAL MANAGEMENTAdded · +143,865 sh+$1.9M
- GEODE CAPITAL MANAGEMENTAdded · +123,227 sh+$1.6M
- STATE STREETAdded · +92,246 sh+$1.2M
Biggest sellers
- Atlas Venture Life Science AdvisorsTrimmed · -174,265 sh-$2.3M
- JANE STREET GROUPSold out · -115,704 sh-$1.5M
- BALYASNY ASSET MANAGEMENT L.P.Trimmed · -88,271 sh-$1.2M
- Trexquant InvestmentTrimmed · -44,726 sh-$589.5K
- ACADIAN ASSET MANAGEMENTTrimmed · -27,345 sh-$360.4K
KRRO 13F holders ranked 1–100 of 106
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | Lynx1 Capital Management#1 · 1,538,296 sh | 1,538,296 | $20.3M | 3.99% | 0.0% |
| 2 | NEA Management Company#2 · 1,297,893 sh | 1,297,893 | $17.1M | 1.08% | 0.0% |
| 3 | VR Adviser#3 · 1,009,500 sh | 1,009,500 | $13.3M | 0.40% | 0.0% |
| 4 | Atlas Venture Life Science Advisors#4 · 962,884 sh | 962,884 | $12.7M | 1.44% | -15.3% |
| 5 | BALYASNY ASSET MANAGEMENT L.P.#5 · 951,783 sh | 951,783 | $12.5M | 0.02% | -8.5% |
| 6 | BlackRock#6 · 817,621 sh | 817,621 | $10.8M | <0.01% | +77.7% |
| 7 | Affinity Asset Advisors#7 · 706,904 sh | 706,904 | $9.3M | 0.42% | 0.0% |
| 8 | Nantahala Capital Management#8 · 660,036 sh | 660,036 | $8.7M | 0.29% | 0.0% |
| 9 | ADAGE CAPITAL PARTNERS GP, L.L.C.#9 · 540,968 sh | 540,968 | $7.1M | 0.01% | +136.9% |
| 10 | ADAR1 Capital Management#10 · 540,054 sh | 540,054 | $7.1M | 0.33% | 0.0% |
| 11 | VANGUARD CAPITAL MANAGEMENT#11 · 454,778 sh | 454,778 | $6.0M | <0.01% | +46.3% |
| 12 | DRIEHAUS CAPITAL MANAGEMENT#12 · 450,045 sh | 450,045 | $5.9M | 0.03% | 0.0% |
| 13 | TCG Crossover Management#13 · 416,301 sh | 416,301 | $5.5M | 0.13% | 0.0% |
| 14 | Siren, L.L.C.#14 · 347,718 sh | 347,718 | $4.6M | 0.09% | 0.0% |
| 15 | AQR CAPITAL MANAGEMENT#15 · 298,974 sh | 298,974 | $3.9M | <0.01% | +11.7% |
| 16 | GEODE CAPITAL MANAGEMENT#16 · 296,870 sh | 296,870 | $3.9M | <0.01% | +71.0% |
| 17 | 72 Investment#17 · 276,831 sh | 276,831 | $3.6M | 7.30% | 0.0% |
| 18 | STATE STREET#18 · 232,587 sh | 232,587 | $3.1M | <0.01% | +65.7% |
| 19 | VANGUARD PORTFOLIO MANAGEMENT#19 · 223,551 sh | 223,551 | $2.9M | <0.01% | +50.5% |
| 20 | TWO SIGMA INVESTMENTS#20 · 178,071 sh | 178,071 | $2.3M | <0.01% | +7.6% |
| 21 | JPMORGAN CHASE#21 · 124,726 sh | 124,726 | $1.6M | <0.01% | +82.1% |
| 22 | MILLENNIUM MANAGEMENT#22 · 118,434 sh | 118,434 | $1.6M | <0.01% | +86.2% |
| 23 | GOLDMAN SACHS GROUP#23 · 116,983 sh | 116,983 | $1.5M | <0.01% | +131.5% |
| 24 | RENAISSANCE TECHNOLOGIES#24 · 110,524 sh | 110,524 | $1.5M | <0.01% | -18.9% |
| 25 | UBS Group AG#25 · 105,453 sh | 105,453 | $1.4M | <0.01% | +386.5% |
| 26 | NORTHERN#26 · 88,089 sh | 88,089 | $1.2M | <0.01% | +52.7% |
| 27 | VANGUARD FIDUCIARY#27 · 74,901 sh | 74,901 | $987.2K | <0.01% | +80.3% |
| 28 | EMERALD MUTUAL FUND ADVISERS#28 · 63,562 sh | 63,562 | $837.7K | 0.03% | +1.1% |
| 29 | F/m Investments#29 · 63,562 sh | 63,562 | $837.7K | 0.04% | +1.1% |
| 30 | Walleye Capital#30 · 54,289 sh | 54,289 | $715.5K | <0.01% | New |
| 31 | Quantinno Capital Management#31 · 52,720 sh | 52,720 | $694.9K | <0.01% | +46.5% |
| 32 | BANK OF AMERICA#32 · 51,707 sh | 51,707 | $681.5K | 0.00% | New |
| 33 | RAYMOND JAMES FINANCIAL#33 · 48,920 sh | 48,920 | $644.8K | <0.01% | +14.2% |
| 34 | XTX Topco Ltd#34 · 47,819 sh | 47,819 | $630.3K | <0.01% | -20.9% |
| 35 | CITADEL ADVISORS#35 · 40,390 sh | 40,390 | $532.3K | <0.01% | +30.7% |
| 36 | FMR#36 · 38,975 sh | 38,975 | $513.7K | 0.00% | +0.2% |
| 37 | BOOTHBAY FUND MANAGEMENT#37 · 35,853 sh | 35,853 | $472.5K | <0.01% | -14.6% |
| 38 | D. E. Shaw#38 · 34,213 sh | 34,213 | $450.9K | <0.01% | New |
| 39 | Jump Financial#39 · 33,906 sh | 33,906 | $446.9K | <0.01% | New |
| 40 | Bank of New York Mellon#40 · 31,730 sh | 31,730 | $418.2K | <0.01% | +46.0% |
| 41 | AIHC Capital Management Ltd#41 · 30,265 sh | 30,265 | $398.9K | 0.38% | 0.0% |
| 42 | Mariner#42 · 27,908 sh | 27,908 | $367.8K | <0.01% | +8.1% |
| 43 | BNP PARIBAS FINANCIAL MARKETS#43 · 26,254 sh | 26,254 | $346.0K | <0.01% | +1015.3% |
| 44 | PANAGORA ASSET MANAGEMENT#44 · 25,572 sh | 25,572 | $337.0K | <0.01% | New |
| 45 | CHARLES SCHWAB INVESTMENT MANAGEMENT#45 · 24,110 sh | 24,110 | $317.8K | 0.00% | +80.0% |
| 46 | MORGAN STANLEY#46 · 22,501 sh | 22,501 | $296.6K | 0.00% | -45.3% |
| 47 | IEQ CAPITAL#47 · 21,246 sh | 21,246 | $280.0K | <0.01% | +66.3% |
| 48 | MARSHALL WACE, LLP#48 · 19,060 sh | 19,060 | $251.2K | <0.01% | -44.5% |
| 49 | GUGGENHEIM CAPITAL#49 · 18,400 sh | 18,400 | $242.5K | <0.01% | +30.5% |
| 50 | PRICE T ROWE ASSOCIATES#50 · 17,634 sh | 17,634 | $233.0K | 0.00% | New |
| 51 | HSBC PLC#51 · 17,812 sh | 17,812 | $232.8K | <0.01% | New |
| 52 | DEUTSCHE BANK AG\#52 · 15,948 sh | 15,948 | $210.2K | <0.01% | +51.3% |
| 53 | Nuveen#53 · 15,861 sh | 15,861 | $209.0K | 0.00% | New |
| 54 | ACADIAN ASSET MANAGEMENT#54 · 14,480 sh | 14,480 | $189.0K | <0.01% | -65.4% |
| 55 | ALGERT GLOBAL#55 · 14,212 sh | 14,212 | $187.3K | <0.01% | -25.9% |
| 56 | Susquehanna Portfolio Strategies#56 · 13,500 sh | 13,500 | $177.9K | <0.01% | -29.4% |
| 57 | MERCER GLOBAL ADVISORS#57 · 12,888 sh | 12,888 | $169.9K | <0.01% | New |
| 58 | WEALTH ENHANCEMENT ADVISORY SERVICES#58 · 11,508 sh | 11,508 | $167.6K | — | New |
| 59 | RHUMBLINE ADVISERS#59 · 12,401 sh | 12,401 | $163.4K | <0.01% | +25.9% |
| 60 | Trexquant Investment#60 · 11,482 sh | 11,482 | $151.3K | <0.01% | -79.6% |
| 61 | DIMENSIONAL FUND ADVISORS#61 · 11,406 sh | 11,406 | $150.3K | 0.00% | New |
| 62 | Cerity Partners#62 · 10,794 sh | 10,794 | $142.3K | <0.01% | New |
| 63 | ALLIANCEBERNSTEIN L.P.#63 · 12,180 sh | 12,180 | $137.9K | 0.00% | New |
| 64 | Engineers Gate Manager#64 · 10,217 sh | 10,217 | $134.7K | <0.01% | -56.9% |
| 65 | AMERICAN CENTURY COMPANIES#65 · 10,153 sh | 10,153 | $133.8K | <0.01% | New |
| 66 | WELLS FARGO & COMPANY#66 · 9,564 sh | 9,564 | $126.1K | 0.00% | +269.4% |
| 67 | SRS Capital Advisors#67 · 5,595 sh | 5,595 | $73.7K | <0.01% | +6405.8% |
| 68 | CITIGROUP#68 · 5,169 sh | 5,169 | $68.1K | 0.00% | +1578.2% |
| 69 | MIRAE ASSET GLOBAL ETFS Ltd.#69 · 5,130 sh | 5,130 | $67.6K | <0.01% | +59.6% |
| 70 | Russell Investments Group, Ltd.#70 · 4,939 sh | 4,939 | $65.1K | <0.01% | +133.5% |
| 71 | Police & Firemen's Retirement System of New Jersey#71 · 4,627 sh | 4,627 | $61.0K | <0.01% | +237.0% |
| 72 | NEW YORK STATE COMMON RETIREMENT FUND#72 · 3,000 sh | 3,000 | $39.5K | 0.00% | 0.0% |
| 73 | SIMPLEX TRADING#73 · 1,975 sh | 1,975 | $26.0K | 0.00% | New |
| 74 | Vanguard Global Advisers#74 · 1,929 sh | 1,929 | $25.4K | 0.00% | 0.0% |
| 75 | North Star Investment Management#75 · 1,800 sh | 1,800 | $23.7K | <0.01% | 0.0% |
| 76 | Tower Research Capital (TRC)#76 · 1,587 sh | 1,587 | $20.9K | <0.01% | -3.5% |
| 77 | Integrated Wealth Concepts#77 · 1,585 sh | 1,585 | $20.9K | <0.01% | New |
| 78 | Legal & General Group Plc#78 · 1,082 sh | 1,082 | $14.3K | 0.00% | +105.7% |
| 79 | GAMMA Investing#79 · 861 sh | 861 | $11.3K | — | +16.8% |
| 80 | TD Waterhouse Canada#80 · 808 sh | 808 | $11.0K | — | 0.0% |
| 81 | Ameritas Investment Partners#81 · 598 sh | 598 | $7.9K | <0.01% | 0.0% |
| 82 | Versant Capital Management#82 · 539 sh | 539 | $7.1K | — | -22.0% |
| 83 | Allworth Financial#83 · 538 sh | 538 | $7.1K | 0.00% | +84.9% |
| 84 | EverSource Wealth Advisors#84 · 498 sh | 498 | $6.6K | <0.01% | -17.3% |
| 85 | DUNCKER STREETT#85 · 437 sh | 437 | $5.8K | <0.01% | 0.0% |
| 86 | IFP Advisors#86 · 418 sh | 418 | $5.5K | — | +828.9% |
| 87 | ROYAL BANK OF CANADA#87 · 352 sh | 352 | $4.0K | 0.00% | +238.5% |
| 88 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#88 · 225 sh | 225 | $3.0K | 0.00% | 0.0% |
| 89 | PNC FINANCIAL SERVICES GROUP#89 · 193 sh | 193 | $2.5K | 0.00% | -76.7% |
| 90 | True Wealth Design#90 · 192 sh | 192 | $2.5K | — | +93.9% |
| 91 | Sterling Capital Management#91 · 191 sh | 191 | $2.5K | — | -13.2% |
| 92 | Essential Partners#92 · 180 sh | 180 | $2.4K | — | -86.4% |
| 93 | OSAIC#93 · 134 sh | 134 | $1.8K | 0.00% | -0.7% |
| 94 | ROTHSCHILD INVESTMENT#94 · 123 sh | 123 | $1.6K | <0.01% | +70.8% |
| 95 | Farther Finance Advisors#95 · 115 sh | 115 | $1.5K | — | +113.0% |
| 96 | Optiver Holding B.V.#96 · 60 sh | 60 | $791.00 | 0.00% | 0.0% |
| 97 | Basecamp Wealth Advisors#97 · 45 sh | 45 | $593.00 | <0.01% | +80.0% |
| 98 | Timbuktu Capital Management#98 · 38 sh | 38 | $501.00 | <0.01% | — |
| 99 | Global Retirement Partners#99 · 35 sh | 35 | $461.00 | 0.00% | — |
| 100 | Wealth Enhancement Services#100 · 33 sh | 33 | $435.00 | — | New |
Funds that sold out of KRRO in Q2 2026 (11)
Held KRRO at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| JANE STREET GROUP115,704 sh | 115,704 | $1.3M |
| Quadrature Capital Ltd20,356 sh | 20,356 | $230.4K |
| HRT FINANCIAL10,790 sh | 10,790 | $122.0K |
| MAI Capital Management606 sh | 606 | $6.9K |
| Advisory Services Network245 sh | 245 | $2.8K |
| Root Financial Partners63 sh | 63 | $713.00 |
| Keating Financial Advisory Services63 sh | 63 | $713.00 |
| Wealth Preservation Advisors44 sh | 44 | $498.00 |
| Bare Financial Services44 sh | 44 | $498.00 |
| Fortitude Family Office39 sh | 39 | $441.00 |
| FIFTH THIRD BANCORP11 sh | 11 | $125.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.