Mariner
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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
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 $633M AUM 173.22% 1-Year Est. Return
NMC
NEA Management Company Timonium, Maryland $1.76B AUM 223.33% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $790M AUM 223.66% 1-Year Est. Return
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $77.1B AUM 42.89% 1-Year Est. Return
VA
VR Adviser New York $2.68B AUM 422.73% 1-Year Est. Return
AAA
Affinity Asset Advisors New York $1.94B AUM 374.45% 1-Year Est. Return
NCM
Nantahala Capital Management New Canaan, Connecticut $2.72B AUM 121.58% 1-Year Est. Return
ACM
ADAR1 Capital Management Austin, Texas $1.7B AUM 340.85% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $13.6B AUM 173.98% 1-Year Est. Return

Mariner's KRRO Position: Q1 2026 in Review

Mariner opened a new position in Korro Bio (KRRO) in Q1 2026: 25,819 shares worth $292K. The stake represents ﹤0.01% of the portfolio and ranks #2905 among its holdings. This is a return to the name: Mariner previously reported a position in KRRO as recently as Q1 2022.

Mariner first reported a position in KRRO in Q1 2022 and has held it in 2 quarters since. 99 funds tracked by Wall St. Rank hold KRRO as of Q1 2026.

  • Mariner held 25,819 shares of Korro Bio worth $292K as of Q1 2026.
  • Korro Bio was a new Mariner position in Q1 2026.
  • Korro Bio made up ﹤0.01% of Mariner's portfolio in Q1 2026, its #2905 holding.
  • Mariner first reported a position in Korro Bio in Q1 2022 and has held it in 2 quarters since.
  • 99 funds tracked by Wall St. Rank held Korro Bio as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.