Jane Street
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Jane Street’s Korro Bio KRRO Stock Holding History

Jane Street’s Portfolio KRRO Stock Details KRRO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$484K Sell
42,800
-273,100
-86% -$3.01M ﹤0.01% 8121
2025
Q4 		$2.53M Buy
+315,900
New +$7.38M ﹤0.01% 4376
2021
Q2 		– Sell
-3,540
Closed -$1.68M – 10125
2021
Q1 		$1.68M Buy
+3,540
New +$6.88M ﹤0.01% 4362

Other funds holding KRRO

LCM
Lynx1 Capital Management San Juan, Puerto Rico $633M AUM 173.22% 1-Year Est. Return
NMC
NEA Management Company Timonium, Maryland $1.76B AUM 223.33% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $790M AUM 223.66% 1-Year Est. Return
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $77.1B AUM 42.89% 1-Year Est. Return
VA
VR Adviser New York $2.68B AUM 422.73% 1-Year Est. Return
AAA
Affinity Asset Advisors New York $1.94B AUM 374.45% 1-Year Est. Return
NCM
Nantahala Capital Management New Canaan, Connecticut $2.72B AUM 121.58% 1-Year Est. Return
ACM
ADAR1 Capital Management Austin, Texas $1.7B AUM 340.85% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $13.6B AUM 173.98% 1-Year Est. Return

Jane Street's KRRO Position: Q1 2026 in Review

Jane Street reduced its Korro Bio (KRRO) stake by 60% in Q1 2026, selling an estimated $1.9M and leaving 115,704 shares worth $1.31M. The position accounts for ﹤0.01% of the portfolio, ranked #5913.

Jane Street first reported a position in KRRO in Q2 2020 and has held it in 10 quarters since. The position peaked at $2.32M in Q1 2024. 99 funds tracked by Wall St. Rank hold KRRO as of Q1 2026.

  • Jane Street held 115,704 shares of Korro Bio worth $1.31M as of Q1 2026.
  • Jane Street sold 172,753 Korro Bio shares in Q1 2026, an estimated $1.9M.
  • Korro Bio made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #5913 holding.
  • Jane Street first reported a position in Korro Bio in Q2 2020 and has held it in 10 quarters since.
  • Jane Street's Korro Bio position peaked at $2.32M in Q1 2024.
  • 99 funds tracked by Wall St. Rank held Korro Bio as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.