Jim Simons’s Korro Bio KRRO Stock Holding History

Jim Simons’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

NEA Management Company Timonium, Maryland $1.59B AUM 234.06% 1-Year Est. Return

VR Adviser New York $3.3B AUM 525.74% 1-Year Est. Return

Atlas Venture Life Science Advisors Cambridge, Massachusetts $881M AUM 160.77% 1-Year Est. Return

Balyasny Asset Management Chicago, Illinois $80.2B AUM 51.53% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Affinity Asset Advisors New York $2.21B AUM 431.26% 1-Year Est. Return

Nantahala Capital Management New Canaan, Connecticut $3.01B AUM 119.46% 1-Year Est. Return

Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return

ADAR1 Capital Management Austin, Texas $2.19B AUM 374.99% 1-Year Est. Return

Jim Simons's KRRO Position: Q2 2026 in Review

Jim Simons 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.

Jim Simons 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.

Jim Simons held 110,524 shares of Korro Bio worth $1.46M as of Q2 2026.
Jim Simons sold 25,703 Korro Bio shares in Q2 2026, an estimated $319K.
Korro Bio made up ﹤0.01% of Jim Simons's portfolio in Q2 2026, its #2139 holding.
Jim Simons first reported a position in Korro Bio in Q4 2021 and has held it in 15 quarters since.
Jim Simons'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.