Arcellx, Inc. (ACLX) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

56,587,167Shares Outstanding

71,202,697Shares held by institutions

$8,193,294,344Value of institutional holdings

125.83%Institutional ownership %

18.06%Shares Changed QoQ

214No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Arcellx, Inc. (NASDAQ:ACLX) has 214 institutional investors that have filed 13F reports for the period ending December 2025.

Collectively, these holders controlled 124.6% of Arcellx's outstanding shares in December 2025, up from 113.3% in September 2025.
They increased total shares held in ACLX by 17.33% quarter over quarter, and investors in Arcellx increased 2.39% from a year ago.
Of these 214 holders, 113 added to their stakes in Arcellx, 69 trimmed positions, and 32 made no changes.
Institutional investors collectively held 70.53Mn shares in Arcellx as of December 2025, up by 10.42Mn shares quarter on quarter, and up 10.06Mn shares year over year.
ALPINE ASSOCIATES MANAGEMENT INC. holds the largest position in ACLX at 378.0K shares as of December 31, 2025, or 0.67% of shares outstanding.
Leading buyers of Arcellx shares for the quarter ending December 2025 were ALPINE ASSOCIATES MANAGEMENT INC. (378.0K), CIBRA Capital Ltd (88.62K), CONGRESS ASSET MANAGEMENT CO (21.55K), SG Americas Securities, LLC (12.67K), E Fund Management Co., Ltd. (5.08K).
The largest sellers of Arcellx for the quarter ending December 2025 were Pictet Asset Management Holding SA (338.38K), STRS OHIO (12.57K), IFP Advisors, Inc (8), SIGNATUREFD, LLC (5), Blue Trust, Inc. (5).
Business Quant data shows the 10 biggest positions in Arcellx as of December 2025 are held by ALPINE ASSOCIATES MANAGEMENT INC. (378.0K), CIBRA Capital Ltd (88.62K), CONGRESS ASSET MANAGEMENT CO (47.55K), SG Americas Securities, LLC (24.71K), High Net Worth Advisory Group LLC (8.0K), E Fund Management Co., Ltd. (5.08K), STRS OHIO (4.3K), Pictet Asset Management Holding SA (4.23K), DELTEC ASSET MANAGEMENT LLC (3.75K), GF FUND MANAGEMENT CO. LTD. (1.3K).

214 Institutional Holders

71,202,697 Total Shares Held

Rows:

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Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
T. Rowe Price Investment Management, Inc.	31 Dec, 2025	16,213,948	9,861,592	155.24%	$1,057,150.00
Gilead Sciences, Inc.	31 Dec, 2025	6,720,803	0	0.00%	$438,196,356.00
Paradigm Biocapital Advisors LP	31 Dec, 2025	5,724,016	1,075,000	23.12%	$373,205,843.00
VANGUARD GROUP INC	31 Dec, 2025	4,081,519	174,432	4.46%	$266,115,040.00
FMR LLC	31 Dec, 2025	3,563,728	-2,197,589	-38.14%	$232,355,097.00
BlackRock, Inc.	31 Dec, 2025	3,548,787	160,891	4.75%	$231,380,928.00
NEA Management Company, LLC	31 Dec, 2025	3,045,262	0	0.00%	$198,551,082.00
Vestal Point Capital, LP	31 Dec, 2025	2,925,000	1,675,000	134.00%	$190,710,000.00
SR ONE CAPITAL MANAGEMENT, LP	31 Dec, 2025	2,346,630	0	0.00%	$153,000,276.00
State Street Corp	31 Dec, 2025	1,998,503	472,476	30.96%	$130,302,396.00
CITADEL ADVISORS LLC	31 Dec, 2025	1,500,223	478,770	46.87%	$97,814,539.00
PERCEPTIVE ADVISORS LLC	31 Dec, 2025	1,466,071	-1,002,282	-40.61%	$95,587,829.00
Jpmorgan Chase & Co	31 Dec, 2025	1,454,477	-310,529	-17.59%	$94,831,912.00
Goldman Sachs Group Inc	31 Dec, 2025	1,336,960	888,519	198.14%	$87,169,792.00
RA CAPITAL MANAGEMENT, L.P.	31 Dec, 2025	1,267,156	-1,769,371	-58.27%	$82,618,571.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	958,057	31,753	3.43%	$62,478,756.00
Janus Henderson Group Plc	31 Dec, 2025	919,578	-94,343	-9.30%	$59,957,552.00
Woodline Partners LP	31 Dec, 2025	737,824	496,435	205.66%	$48,106,125.00
BAMCO INC /NY/	31 Dec, 2025	609,697	59,461	10.81%	$39,752,244.00
Affinity Asset Advisors, LLC	31 Dec, 2025	523,725	23,725	4.75%	$34,146,870.00

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