Mariner
KRRO icon

Mariner’s Korro Bio KRRO Stock Holding History

Mariner’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 		$368K Buy
27,908
+2,089
+8% +$26K ﹤0.01% 2680
2026
Q1 		$292K Buy
+25,819
New +$284K ﹤0.01% 2905
2022
Q2 		– Sell
-2,572
Closed -$273K – 1421
2022
Q1 		$273K Buy
+2,572
New +$491K ﹤0.01% 1306

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

Mariner's KRRO Position: Q2 2026 in Review

Mariner increased its Korro Bio (KRRO) stake by 8.1% in Q2 2026, buying an estimated $26K and bringing the position to 27,908 shares worth $368K. The position accounts for ﹤0.01% of the portfolio, ranked #2680.

Mariner first reported a position in KRRO in Q1 2022 and has held it in 3 quarters since. 107 funds tracked by Wall St. Rank hold KRRO as of Q2 2026.

  • Mariner held 27,908 shares of Korro Bio worth $368K as of Q2 2026.
  • Mariner bought 2,089 Korro Bio shares in Q2 2026, an estimated $26K.
  • Korro Bio made up ﹤0.01% of Mariner's portfolio in Q2 2026, its #2680 holding.
  • Mariner first reported a position in Korro Bio in Q1 2022 and has held it in 3 quarters since.
  • 107 funds tracked by Wall St. Rank held Korro Bio as of Q2 2026.

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