Hudson Bay Capital Management
ACLX

Hudson Bay Capital Management’s Arcellx ACLX Stock Holding History

Hudson Bay Capital Management’s Portfolio ACLX Stock Details ACLX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$14.1M Sell
122,900
-278,042
-69% -$24.5M 0.05% 245
2025
Q4 		$26.1M Buy
+400,942
New +$32M 0.09% 197

Other funds holding ACLX

GS
Gilead Sciences Foster City, California $1.65B AUM 166.99% 1-Year Est. Return
PBA
Paradigm Biocapital Advisors New York $4.89B AUM 251.12% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
NMC
NEA Management Company Timonium, Maryland $1.76B AUM 223.33% 1-Year Est. Return
PCM
Pentwater Capital Management Naples, Florida $19.3B AUM 58.13% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
SOCM
SR One Capital Management Wayne, Pennsylvania $915M AUM 209.71% 1-Year Est. Return
Fidelity International
Fidelity International Hamilton, Bermuda $129B AUM 30.83% 1-Year Est. Return
HI
HBK Investments Dallas, Texas $9.85B AUM 55.6% 1-Year Est. Return

Hudson Bay Capital Management's ACLX Position: Q1 2026 in Review

Hudson Bay Capital Management reduced its Arcellx (ACLX) stake by 69% in Q1 2026, selling an estimated $24.5M and leaving 122,900 shares worth $14.1M. The position accounts for 0.05% of the portfolio, ranked #245.

Hudson Bay Capital Management first reported a position in ACLX in Q4 2025 and has held it in 2 quarters since. The position peaked at $26.1M in Q4 2025. 239 funds tracked by Wall St. Rank hold ACLX as of Q1 2026.

  • Hudson Bay Capital Management held 122,900 shares of Arcellx worth $14.1M as of Q1 2026.
  • Hudson Bay Capital Management sold 278,042 Arcellx shares in Q1 2026, an estimated $24.5M.
  • Arcellx made up 0.05% of Hudson Bay Capital Management's portfolio in Q1 2026, its #245 holding.
  • Hudson Bay Capital Management first reported a position in Arcellx in Q4 2025 and has held it in 2 quarters since.
  • Hudson Bay Capital Management's Arcellx position peaked at $26.1M in Q4 2025.
  • 239 funds tracked by Wall St. Rank held Arcellx as of Q1 2026.

Based on Hudson Bay Capital Management's 13F filing for Q1 2026, filed 13 May 2026.