Magnetar Financial’s Arcellx ACLX Stock Holding History

Magnetar Financial’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 Q2	–	Sell	-394,931	Closed	-$45.3M	–	1140
2026 Q1	$45.3M	Buy	+394,931	New	+$34.9M	0.46%	28

Other funds holding ACLX

DekaBank Deutsche Girozentrale Frankfurt, Germany $59.2B AUM 26.02% 1-Year Est. Return

IFP Advisors Tampa, Florida $5.54B AUM 27.43% 1-Year Est. Return

Magnetar Financial's ACLX Position: Q2 2026 in Review

Magnetar Financial sold out of Arcellx (ACLX) in Q2 2026, closing a stake of 394,931 shares — an estimated $45.3M sold.

Magnetar Financial first reported a position in ACLX in Q1 2026 and held it in 1 quarter. The position peaked at $45.3M in Q1 2026. 2 funds tracked by Wall St. Rank hold ACLX as of Q2 2026.

Magnetar Financial reported no remaining Arcellx position as of Q2 2026 after selling out during the quarter.
Magnetar Financial sold 394,931 Arcellx shares in Q2 2026, an estimated $45.3M.
Magnetar Financial first reported a position in Arcellx in Q1 2026 and held it in 1 quarter.
Magnetar Financial's Arcellx position peaked at $45.3M in Q1 2026.
2 funds tracked by Wall St. Rank held Arcellx as of Q2 2026.

Based on Magnetar Financial's 13F filing for Q2 2026, filed 14 Aug 2026.