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
2026
Q1 		$57.7M Buy
502,846
+494,025
+5,601% +$43.6M 0.02% 739
2025
Q4 		$575K Sell
8,821
-31,520
-78% -$2.51M ﹤0.01% 4856
2025
Q3 		$3.31M Sell
40,341
-54,221
-57% -$3.9M ﹤0.01% 3548
2025
Q2 		$6.23M Buy
94,562
+43,506
+85% +$2.71M ﹤0.01% 2761
2025
Q1 		$3.35M Buy
51,056
+28,686
+128% +$1.94M ﹤0.01% 3274
2024
Q4 		$1.72M Buy
+22,370
New +$1.93M ﹤0.01% 3766
2024
Q2 		– Sell
-61,210
Closed -$4.26M – 5811
2024
Q1 		$4.26M Buy
61,210
+3,836
+7% +$243K ﹤0.01% 3029
2023
Q4 		$3.18M Buy
57,374
+6,009
+12% +$271K ﹤0.01% 3185
2023
Q3 		$1.84M Sell
51,365
-190,770
-79% -$6.58M ﹤0.01% 3630
2023
Q2 		$7.66M Buy
242,135
+121,337
+100% +$4.64M ﹤0.01% 2283
2023
Q1 		$3.72M Buy
120,798
+50,521
+72% +$1.53M ﹤0.01% 2875
2022
Q4 		$2.18M Buy
70,277
+49,039
+231% +$1.12M ﹤0.01% 3491
2022
Q3 		$399K Sell
21,238
-64,263
-75% -$1.23M ﹤0.01% 5136
2022
Q2 		$1.55M Sell
85,501
-5,714
-6% -$73.7K ﹤0.01% 3962
2022
Q1 		$1.28M Buy
+91,215
New +$1.53M ﹤0.01% 4300

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.