Renaissance Technologies
KRRO icon

Renaissance Technologies’s Korro Bio KRRO Stock Holding History

Renaissance Technologies’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
Q2 		$1.46M Sell
110,524
-25,703
-19% -$319K ﹤0.01% 2139
2026
Q1 		$1.54M Buy
136,227
+61,327
+82% +$675K ﹤0.01% 2031
2025
Q4 		$600K Buy
74,900
+34,500
+85% +$806K ﹤0.01% 2504
2025
Q3 		$1.93M Sell
40,400
-5,300
-12% -$118K ﹤0.01% 2100
2025
Q2 		$571K Buy
+45,700
New +$658K ﹤0.01% 2767
2024
Q2 		– Sell
-9,893
Closed -$890K – 3762
2024
Q1 		$890K Hold
9,893
– – ﹤0.01% 2557
2023
Q4 		$474K Buy
9,893
+1,259
+15% +$41.5K ﹤0.01% 2804
2023
Q3 		$160K Buy
8,634
+450
+5% +$11.3K ﹤0.01% 3140
2023
Q2 		$142K Buy
8,184
+454
+6% +$8.81K ﹤0.01% 3383
2023
Q1 		$194K Buy
7,730
+751
+11% +$85.6K ﹤0.01% 3294
2022
Q4 		$1.34M Sell
6,979
-410
-6% -$42.2K ﹤0.01% 2341
2022
Q3 		$661K Sell
7,389
-4,975
-40% -$505K ﹤0.01% 2744
2022
Q2 		$927K Buy
12,364
+6,653
+116% +$450K ﹤0.01% 2773
2022
Q1 		$605K Buy
5,711
+5,443
+2,031% +$1.04M ﹤0.01% 3061
2021
Q4 		$69K Buy
+268
New +$81.5K ﹤0.01% 3744

Other funds holding KRRO

LCM
Lynx1 Capital Management San Juan, Puerto Rico $866M AUM 231.68% 1-Year Est. Return
NMC
NEA Management Company Timonium, Maryland $1.59B AUM 234.06% 1-Year Est. Return
VA
VR Adviser New York $3.3B AUM 525.74% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $881M AUM 160.77% 1-Year Est. Return
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $80.2B AUM 51.53% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
AAA
Affinity Asset Advisors New York $2.21B AUM 431.26% 1-Year Est. Return
NCM
Nantahala Capital Management New Canaan, Connecticut $3.01B AUM 119.46% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return
ACM
ADAR1 Capital Management Austin, Texas $2.19B AUM 374.99% 1-Year Est. Return

Renaissance Technologies's KRRO Position: Q2 2026 in Review

Renaissance Technologies reduced its Korro Bio (KRRO) stake by 19% in Q2 2026, selling an estimated $319K and leaving 110,524 shares worth $1.46M. The position accounts for ﹤0.01% of the portfolio, ranked #2139.

Renaissance Technologies first reported a position in KRRO in Q4 2021 and has held it in 15 quarters since. The position peaked at $1.93M in Q3 2025. 106 funds tracked by Wall St. Rank hold KRRO as of Q2 2026.

  • Renaissance Technologies held 110,524 shares of Korro Bio worth $1.46M as of Q2 2026.
  • Renaissance Technologies sold 25,703 Korro Bio shares in Q2 2026, an estimated $319K.
  • Korro Bio made up ﹤0.01% of Renaissance Technologies's portfolio in Q2 2026, its #2139 holding.
  • Renaissance Technologies first reported a position in Korro Bio in Q4 2021 and has held it in 15 quarters since.
  • Renaissance Technologies's Korro Bio position peaked at $1.93M in Q3 2025.
  • 106 funds tracked by Wall St. Rank held Korro Bio as of Q2 2026.

Based on Renaissance Technologies's 13F filing for Q2 2026, filed 13 Aug 2026.