Millennium Management
ACLX

Millennium Management’s Arcellx ACLX Stock Holding History

Millennium 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
2025
Q2 		– Sell
-10,300
Closed -$676K – 5808
2025
Q1 		$676K Buy
+10,300
New +$698K ﹤0.01% 4630
2024
Q4 		– Sell
-10,000
Closed -$835K – 5895
2024
Q3 		$835K Buy
+10,000
New +$666K ﹤0.01% 4419
2023
Q4 		– Sell
-10,000
Closed -$359K – 6017
2023
Q3 		$359K Buy
+10,000
New +$345K ﹤0.01% 4838

Other funds holding ACLX

GS
Gilead Sciences Foster City, California $2.12B AUM 143.53% 1-Year Est. Return
PBA
Paradigm Biocapital Advisors New York $4.89B AUM 251.12% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 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

Millennium Management's ACLX Position: Q1 2026 in Review

Millennium Management increased its Arcellx (ACLX) stake by 5,601% in Q1 2026, buying an estimated $43.6M and bringing the position to 502,846 shares worth $57.7M. The position accounts for 0.02% of the portfolio, ranked #739.

Millennium Management first reported a position in ACLX in Q1 2022 and has held it in 15 quarters since. 239 funds tracked by Wall St. Rank hold ACLX as of Q1 2026.

  • Millennium Management held 502,846 shares of Arcellx worth $57.7M as of Q1 2026.
  • Millennium Management bought 494,025 Arcellx shares in Q1 2026, an estimated $43.6M.
  • Arcellx made up 0.02% of Millennium Management's portfolio in Q1 2026, its #739 holding.
  • Millennium Management first reported a position in Arcellx in Q1 2022 and has held it in 15 quarters since.
  • 239 funds tracked by Wall St. Rank held Arcellx as of Q1 2026.

Based on Millennium Management's 13F filing for Q1 2026, filed 15 May 2026.