Simplex Trading
KRRO icon

Simplex Trading’s Korro Bio KRRO Stock Holding History

Simplex Trading’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 		$136K Buy
10,300
+9,100
+758% +$113K ﹤0.01% 5190
2026
Q1 		$13.6K Sell
1,200
-76,900
-98% -$847K ﹤0.01% 7079
2025
Q4 		$626K Buy
+78,100
New +$1.83M ﹤0.01% 3078
2022
Q1 		– Sell
-100
Closed -$25K – 10936
2021
Q4 		$25K Buy
100
+86
+614% +$26.1K ﹤0.01% 8112
2021
Q3 		$6K Sell
14
-6
-30% -$2.36K ﹤0.01% 9202
2021
Q2 		$9K Sell
20
-2
-9% -$977 ﹤0.01% 9159
2021
Q1 		$1.04M Buy
22
+20
+1,000% +$38.9K ﹤0.01% 2347
2020
Q4 		$363K Buy
+2
New +$2.64K ﹤0.01% 3834

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

Simplex Trading's KRRO Position: Q2 2026 in Review

Simplex Trading opened a new position in Korro Bio (KRRO) in Q2 2026: 1,975 shares worth $26K. The stake represents ﹤0.01% of the portfolio and ranks #6878 among its holdings. This is a return to the name: Simplex Trading previously reported a position in KRRO as recently as Q4 2025.

Simplex Trading first reported a position in KRRO in Q1 2021 and has held it in 7 quarters since. The position peaked at $419K in Q1 2021. 107 funds tracked by Wall St. Rank hold KRRO as of Q2 2026.

  • Simplex Trading held 1,975 shares of Korro Bio worth $26K as of Q2 2026.
  • Korro Bio was a new Simplex Trading position in Q2 2026.
  • Korro Bio made up ﹤0.01% of Simplex Trading's portfolio in Q2 2026, its #6878 holding.
  • Simplex Trading first reported a position in Korro Bio in Q1 2021 and has held it in 7 quarters since.
  • Simplex Trading's Korro Bio position peaked at $419K in Q1 2021.
  • 107 funds tracked by Wall St. Rank held Korro Bio as of Q2 2026.

Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.