American Century Companies
ACLX

American Century Companies’s Arcellx ACLX Stock Holding History

American Century Companies’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 		– Sell
-419,080
Closed -$27.3M – 2831
2025
Q4 		$27.3M Buy
419,080
+7,150
+2% +$570K 0.01% 1016
2025
Q3 		$33.8M Sell
411,930
-19,536
-5% -$1.41M 0.02% 881
2025
Q2 		$28.4M Buy
431,466
+377,145
+694% +$23.5M 0.02% 926
2025
Q1 		$3.56M Buy
54,321
+24,875
+84% +$1.69M ﹤0.01% 1744
2024
Q4 		$2.26M Buy
+29,446
New +$2.54M ﹤0.01% 1937

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

American Century Companies's ACLX Position: Q1 2026 in Review

American Century Companies sold out of Arcellx (ACLX) in Q1 2026, closing a stake of 419,080 shares — an estimated $27.3M sold.

American Century Companies first reported a position in ACLX in Q4 2024 and held it in 5 quarters. The position peaked at $33.8M in Q3 2025. 239 funds tracked by Wall St. Rank hold ACLX as of Q1 2026.

  • American Century Companies reported no remaining Arcellx position as of Q1 2026 after selling out during the quarter.
  • American Century Companies sold 419,080 Arcellx shares in Q1 2026, an estimated $27.3M.
  • American Century Companies first reported a position in Arcellx in Q4 2024 and held it in 5 quarters.
  • American Century Companies's Arcellx position peaked at $33.8M in Q3 2025.
  • 239 funds tracked by Wall St. Rank held Arcellx as of Q1 2026.

Based on American Century Companies's 13F filing for Q1 2026, filed 15 May 2026.