AllianceBernstein
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AllianceBernstein’s Korro Bio KRRO Stock Holding History

AllianceBernstein’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
2025
Q4 		– Sell
-7,700
Closed -$369K – 3266
2025
Q3 		$369K Buy
+7,700
New +$171K ﹤0.01% 2845
2025
Q2 		– Sell
-680,517
Closed -$11.8M – 3279
2025
Q1 		$11.8M Sell
680,517
-25,277
-4% -$749K ﹤0.01% 1083
2024
Q4 		$26.9M Buy
+705,794
New +$36.3M 0.01% 816
2022
Q2 		– Sell
-676
Closed -$72K – 3326
2022
Q1 		$72K Sell
676
-66
-9% -$12.6K ﹤0.01% 3141
2021
Q4 		$190K Sell
742
-50
-6% -$15.2K ﹤0.01% 3083
2021
Q3 		$280K Hold
792
– – ﹤0.01% 2977
2021
Q2 		$394K Buy
792
+96
+14% +$46.9K ﹤0.01% 2911
2021
Q1 		$331K Buy
696
+76
+12% +$148K ﹤0.01% 2855
2020
Q4 		$1.09M Sell
620
-44
-7% -$58.1K ﹤0.01% 2254
2020
Q3 		$638K Sell
664
-26
-4% -$27.9K ﹤0.01% 2403
2020
Q2 		$802K Buy
+690
New +$623K ﹤0.01% 2314

Other funds holding KRRO

AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $790M AUM 223.66% 1-Year Est. Return
NMC
NEA Management Company Timonium, Maryland $1.76B AUM 223.33% 1-Year Est. Return
LCM
Lynx1 Capital Management San Juan, Puerto Rico $633M AUM 173.22% 1-Year Est. Return
NCM
Nantahala Capital Management New Canaan, Connecticut $2.72B AUM 121.58% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
TCM
TCG Crossover Management Palo Alto, California $3.5B AUM 1,165.83% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $3.61B AUM 203.3% 1-Year Est. Return
Jane Street
Jane Street New York $777B AUM 61.18% 1-Year Est. Return
7IH
72 Investment Holdings Stamford, Connecticut $49.6M AUM 684.72% 1-Year Est. Return

AllianceBernstein's KRRO Position: Q4 2025 in Review

AllianceBernstein sold out of Korro Bio (KRRO) in Q4 2025, closing a stake of 7,700 shares — an estimated $369K sold.

AllianceBernstein first reported a position in KRRO in Q2 2020 and held it in 11 quarters. The position peaked at $26.9M in Q4 2024. 83 funds tracked by Wall St. Rank hold KRRO as of Q4 2025.

  • AllianceBernstein reported no remaining Korro Bio position as of Q4 2025 after selling out during the quarter.
  • AllianceBernstein sold 7,700 Korro Bio shares in Q4 2025, an estimated $369K.
  • AllianceBernstein first reported a position in Korro Bio in Q2 2020 and held it in 11 quarters.
  • AllianceBernstein's Korro Bio position peaked at $26.9M in Q4 2024.
  • 83 funds tracked by Wall St. Rank held Korro Bio as of Q4 2025.

Based on AllianceBernstein's 13F filing for Q4 2025, filed 17 Feb 2026.