Citadel Advisors
ACLX

Citadel Advisors’s Arcellx ACLX Stock Holding History

Citadel Advisors’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 		$2.31M Sell
20,100
-10,100
-33% -$891K ﹤0.01% 5789
2025
Q4 		$1.97M Buy
30,200
+11,900
+65% +$949K ﹤0.01% 5948
2025
Q3 		$1.5M Sell
18,300
-82,600
-82% -$5.95M ﹤0.01% 6671
2025
Q2 		$6.64M Buy
100,900
+90,200
+843% +$5.62M ﹤0.01% 3639
2025
Q1 		$702K Sell
10,700
-27,200
-72% -$1.84M ﹤0.01% 7744
2024
Q4 		$2.91M Sell
37,900
-700
-2% -$60.5K ﹤0.01% 4892
2024
Q3 		$3.22M Buy
38,600
+36,500
+1,738% +$2.43M ﹤0.01% 4669
2024
Q2 		$116K Sell
2,100
-28,900
-93% -$1.57M ﹤0.01% 10704
2024
Q1 		$2.16M Buy
31,000
+24,100
+349% +$1.53M ﹤0.01% 5376
2023
Q4 		$383K Buy
6,900
+1,600
+30% +$72.2K ﹤0.01% 8659
2023
Q3 		$190K Buy
5,300
+1,400
+36% +$48.3K ﹤0.01% 9997
2023
Q2 		$123K Sell
3,900
-9,200
-70% -$352K ﹤0.01% 10606
2023
Q1 		$404K Buy
13,100
+2,800
+27% +$84.9K ﹤0.01% 8753
2022
Q4 		$319K Buy
+10,300
New +$236K ﹤0.01% 9180

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

Citadel Advisors's ACLX Position: Q1 2026 in Review

Citadel Advisors reduced its Arcellx (ACLX) stake by 99% in Q1 2026, selling an estimated $130M and leaving 21,806 shares worth $2.5M. The position accounts for ﹤0.01% of the portfolio, ranked #5621.

Citadel Advisors first reported a position in ACLX in Q1 2022 and has held it in 16 quarters since. The position peaked at $97.8M in Q4 2025. 239 funds tracked by Wall St. Rank hold ACLX as of Q1 2026.

  • Citadel Advisors held 21,806 shares of Arcellx worth $2.5M as of Q1 2026.
  • Citadel Advisors sold 1,478,417 Arcellx shares in Q1 2026, an estimated $130M.
  • Arcellx made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #5621 holding.
  • Citadel Advisors first reported a position in Arcellx in Q1 2022 and has held it in 16 quarters since.
  • Citadel Advisors's Arcellx position peaked at $97.8M in Q4 2025.
  • 239 funds tracked by Wall St. Rank held Arcellx as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.