T. Rowe Price Investment Management
ACLX

T. Rowe Price Investment Management’s Arcellx ACLX Stock Holding History

T. Rowe Price Investment 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 		$259M Sell
2,255,878
-8,304,547
-79% -$733M 0.18% 135
2025
Q4 		$689M Buy
10,560,425
+4,208,069
+66% +$336M 0.43% 58
2025
Q3 		$522M Buy
6,352,356
+4,408,630
+227% +$317M 0.32% 86
2025
Q2 		$128M Buy
1,943,726
+278,588
+17% +$17.3M 0.08% 235
2025
Q1 		$109M Buy
1,665,138
+959,216
+136% +$65M 0.07% 260
2024
Q4 		$54.1M Sell
705,922
-238,716
-25% -$20.6M 0.03% 397
2024
Q3 		$78.9M Sell
944,638
-229,153
-20% -$15.3M 0.05% 337
2024
Q2 		$64.8M Buy
1,173,791
+190,929
+19% +$10.4M 0.04% 350
2024
Q1 		$68.4M Buy
982,862
+60,463
+7% +$3.83M 0.04% 348
2023
Q4 		$51.2M Buy
922,399
+12,221
+1% +$551K 0.03% 388
2023
Q3 		$32.7M Buy
+910,178
New +$31.4M 0.02% 423

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 $1.04B AUM 262.99% 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

T. Rowe Price Investment Management's ACLX Position: Q1 2026 in Review

T. Rowe Price Investment Management reduced its Arcellx (ACLX) stake by 79% in Q1 2026, selling an estimated $733M and leaving 2,255,878 shares worth $259M. The position accounts for 0.18% of the portfolio, ranked #135.

T. Rowe Price Investment Management first reported a position in ACLX in Q3 2023 and has held it in 11 quarters since. The position peaked at $689M in Q4 2025. 239 funds tracked by Wall St. Rank hold ACLX as of Q1 2026.

  • T. Rowe Price Investment Management held 2,255,878 shares of Arcellx worth $259M as of Q1 2026.
  • T. Rowe Price Investment Management sold 8,304,547 Arcellx shares in Q1 2026, an estimated $733M.
  • Arcellx made up 0.18% of T. Rowe Price Investment Management's portfolio in Q1 2026, its #135 holding.
  • T. Rowe Price Investment Management first reported a position in Arcellx in Q3 2023 and has held it in 11 quarters since.
  • T. Rowe Price Investment Management's Arcellx position peaked at $689M in Q4 2025.
  • 239 funds tracked by Wall St. Rank held Arcellx as of Q1 2026.

Based on T. Rowe Price Investment Management's 13F filing for Q1 2026, filed 15 May 2026.