Marshall Wace
KRRO icon

Marshall Wace’s Korro Bio KRRO Stock Holding History

Marshall Wace’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 		$251K Sell
19,060
-15,283
-45% -$190K ﹤0.01% 2769
2026
Q1 		$389K Buy
34,343
+14,571
+74% +$160K ﹤0.01% 2555
2025
Q4 		$158K Buy
+19,772
New +$462K ﹤0.01% 2640
2025
Q1 		– Sell
-18,461
Closed -$703K – 2885
2024
Q4 		$703K Buy
+18,461
New +$949K ﹤0.01% 1894
2024
Q3 		– Sell
-9,103
Closed -$308K – 2755
2024
Q2 		$308K Sell
9,103
-4,304
-32% -$238K ﹤0.01% 2144
2024
Q1 		$1.21M Buy
+13,407
New +$732K ﹤0.01% 1579
2023
Q2 		– Sell
-1,362
Closed -$34K – 2726
2023
Q1 		$34K Buy
+1,362
New +$155K ﹤0.01% 2560
2021
Q1 		– Sell
-313
Closed -$553K – 2685
2020
Q4 		$553K Buy
+313
New +$413K ﹤0.01% 1422
2020
Q2 		– Sell
-42
Closed -$37K – 1779
2020
Q1 		$37K Sell
42
-663
-94% -$716K ﹤0.01% 1467
2019
Q4 		$618K Buy
+705
New +$548K ﹤0.01% 1105

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

Marshall Wace's KRRO Position: Q2 2026 in Review

Marshall Wace reduced its Korro Bio (KRRO) stake by 45% in Q2 2026, selling an estimated $190K and leaving 19,060 shares worth $251K. The position accounts for ﹤0.01% of the portfolio, ranked #2769.

Marshall Wace first reported a position in KRRO in Q4 2019 and has held it in 10 quarters since. The position peaked at $1.21M in Q1 2024. 107 funds tracked by Wall St. Rank hold KRRO as of Q2 2026.

  • Marshall Wace held 19,060 shares of Korro Bio worth $251K as of Q2 2026.
  • Marshall Wace sold 15,283 Korro Bio shares in Q2 2026, an estimated $190K.
  • Korro Bio made up ﹤0.01% of Marshall Wace's portfolio in Q2 2026, its #2769 holding.
  • Marshall Wace first reported a position in Korro Bio in Q4 2019 and has held it in 10 quarters since.
  • Marshall Wace's Korro Bio position peaked at $1.21M in Q1 2024.
  • 107 funds tracked by Wall St. Rank held Korro Bio as of Q2 2026.

Based on Marshall Wace's 13F filing for Q2 2026, filed 13 Aug 2026.