Paradigm Biocapital Advisors LP

Holdings History for Arcellx, Inc. - COMMON STOCK (ACLX)

Symbol: ACLX on Nasdaq
Investment type: Equity / COMMON STOCK
Latest Disclosed Shares Owned: 5,724,016 shares
Security Ownership %: 9.9%

Shares, Excluding Options vs Price

Value, Excluding Options

Paradigm BioCapital Advisors LP ownership in Arcellx, Inc. COMMON STOCK (ACLX)

17 Feb 2026 - Paradigm BioCapital Advisors LP has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 5,724,016 shares of Arcellx, Inc. COMMON STOCK (ACLX). This represents 9.9% ownership of the company. This is the first filing by Paradigm Biocapital Advisors LP disclosing ownership of Arcellx, Inc. COMMON STOCK (ACLX).

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filing time
Paradigm BioCapital Advisors LP	9.9%		$379,330,540	5,724,016			$66.27	13G/A	31 Dec 2025	17 Feb 2026, 16:03

Holdings date	Option	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
31 Dec 2025		10%	+1.9%	$373,205,843	5,724,016	+1,075,000	+23%	$65.20	Q4 2025
30 Sep 2025		11%	0%	$381,684,214	4,649,016	0		$82.10	Q3 2025
30 Jun 2025		13%	+0.44%	$306,137,704	4,649,016	+156,984	+3.5%	$65.85	Q2 2025
31 Mar 2025		14%	+0.36%	$294,677,299	4,492,032	+120,431		$65.60	Q1 2025
31 Dec 2024		12%	+0.99%	$335,258,081	4,371,601	+371,601	+9.3%	$76.69	Q4 2024
31 Dec 2024	call		-68%	$0	0	-800,000	-100%	$69.88	Q4 2024
30 Sep 2024		12%	+0.44%	$334,040,000	4,000,000	+151,905	+3.9%	$83.51	Q3 2024
30 Sep 2024	call	68%	+68%	$66,808,000	800,000	+800,000	NEW	$83.51	Q3 2024
30 Jun 2024		8.1%	+0.06%	$212,376,363	3,848,095	+30,000	+0.79%	$55.19	Q2 2024
31 Mar 2024		9.3%	+0.39%	$265,548,507	3,818,095	+159,471	+4.4%	$69.55	Q1 2024
31 Dec 2023		9.5%	+1.8%	$203,053,632	3,658,624	+705,502	+24%	$55.50	Q4 2023
30 Sep 2023		7.2%	+1.5%	$105,958,017	2,953,122	+606,122	+26%	$35.88	Q3 2023
30 Jun 2023		6%	+1.5%	$74,212,140	2,347,000	+589,221	+34%	$31.62	Q2 2023
31 Mar 2023		5.1%	+2.6%	$54,157,171	1,757,779	+875,678	+99%	$30.81	Q1 2023
31 Dec 2022		3.2%	+3.2%	$27,327,489	882,101	+882,101	NEW	$30.98	Q4 2022

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.