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 		$2.5M Sell
21,806
-1,478,417
-99% -$130M ﹤0.01% 5621
2025
Q4 		$97.8M Buy
1,500,223
+478,770
+47% +$38.2M 0.01% 882
2025
Q3 		$83.9M Buy
1,021,453
+823,090
+415% +$59.3M 0.01% 972
2025
Q2 		$13.1M Sell
198,363
-527,764
-73% -$32.9M ﹤0.01% 2680
2025
Q1 		$47.6M Buy
726,127
+700,901
+2,778% +$47.5M 0.01% 1191
2024
Q4 		$1.93M Buy
25,226
+8,139
+48% +$703K ﹤0.01% 5704
2024
Q3 		$1.43M Buy
+17,087
New +$1.14M ﹤0.01% 6162
2024
Q2 		– Sell
-77,730
Closed -$4.23M – 14137
2024
Q1 		$5.41M Buy
77,730
+54,534
+235% +$3.46M ﹤0.01% 3832
2023
Q4 		$1.29M Sell
23,196
-21,500
-48% -$970K ﹤0.01% 6179
2023
Q3 		$1.6M Sell
44,696
-316,379
-88% -$10.9M ﹤0.01% 5629
2023
Q2 		$11.4M Sell
361,075
-1,153,821
-76% -$44.1M ﹤0.01% 2506
2023
Q1 		$46.7M Sell
1,514,896
-180,910
-11% -$5.49M 0.01% 1133
2022
Q4 		$52.5M Sell
1,695,806
-50,164
-3% -$1.15M 0.01% 1093
2022
Q3 		$32.8M Sell
1,745,970
-23,430
-1% -$448K 0.01% 1396
2022
Q2 		$31.3M Buy
1,769,400
+450,374
+34% +$5.81M 0.01% 1435
2022
Q1 		$18M Buy
+1,319,026
New +$22.1M ﹤0.01% 2098

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.