Korro Bio KRRO Institutional Ownership

Updated Oct 10, 2026

Korro Bio, Inc. (NASDAQ:KRRO) was held by 105 institutional investors that filed 13F reports for the quarter ended June 30, 2026.

• Their combined stake equaled 79.58% of outstanding shares in Q2 2026, down from 88.00% in Q1 2026.
• Total shares held in Korro Bio rose 10.47% versus Q1 2026, while the number of holders rose 56.72% versus Q2 2025.
• Of the 105 holders of KRRO in Q2 2026, 65 added to their positions, 20 reduced their stakes and 20 left their positions unchanged.
• Combined, institutional investors held 14.02Mn shares of KRRO as of Q2 2026, up 1.33Mn from the prior quarter and up 5.4Mn from a year earlier.
• Lynx1 Capital Management LP was the top holder of Korro Bio as of June 30, 2026, with 1.54Mn shares, or 8.73% of shares outstanding.
• The largest position increases in KRRO for Q2 2026 were by BlackRock, Inc. (+357.62K shares), Adage Capital Partners GP, L.L.C. (+312.57K shares), Vanguard Capital Management LLC (+143.87K shares), Geode Capital Management, LLC (+123.23K shares) and State Street Corp (+92.25K shares).
• The largest position reductions in KRRO for Q2 2026 were by Atlas Venture Life Science Advisors, LLC (-174.26K shares), Balyasny Asset Management L.P. (-88.27K shares), Trexquant Investment LP (-44.73K shares), Acadian Asset Management LLC (-27.34K shares) and Renaissance Technologies LLC (-25.7K shares).
• Korro Bio's 10 largest institutional shareholders as of Q2 2026 were Lynx1 Capital Management LP (1.54Mn shares), NEA Management Company, LLC (1.3Mn shares), Venrock Adviser, LLC (1.01Mn shares), Atlas Venture Life Science Advisors, LLC (962.88K shares), Balyasny Asset Management L.P. (951.78K shares), BlackRock, Inc. (817.62K shares), Affinity Asset Advisors, LLC (706.9K shares), Nantahala Capital Management, LLC (660.04K shares), Adage Capital Partners GP, L.L.C. (540.97K shares) and ADAR1 Capital Management, LLC (540.05K shares), per Business Quant data.