Arcellx, Inc. (ACLX) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

0Shares Outstanding

17,137,255Shares held by institutions

$1,966,842,756Value of institutional holdings

108.46%Institutional ownership %

-4.38%Shares Changed QoQ

201No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Arcellx, Inc. (NASDAQ:ACLX) is held by 214 institutional investors per 13F filings through December 2025.

They owned 124.6% of outstanding stock in December 2025, up from 113.3% the prior quarter.
Their total shares held in ACLX increased 17.33% from the prior quarter, while the number of investors in Arcellx increased 2.39% year over year.
During the quarter, 113 of these 214 funds increased positions in ACLX, 69 reduced exposure, and 32 held steady.
In total, institutional investors 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.
T. Rowe Price Investment Management, Inc. leads ownership in ACLX with 16.21Mn shares as of December 31, 2025, equal to 28.65% of outstanding shares.
The most significant purchases of ACLX for the quarter ending December 2025 came from T. Rowe Price Investment Management, Inc. (9.86Mn), Vestal Point Capital, LP (1.67Mn), Paradigm Biocapital Advisors LP (1.08Mn), Woodline Partners LP (496.44K), CITADEL ADVISORS LLC (478.77K).
The biggest sellers of Arcellx for the quarter ending December 2025 included FMR LLC (2.2Mn), RA CAPITAL MANAGEMENT, L.P. (1.77Mn), PERCEPTIVE ADVISORS LLC (1.0Mn), AJU IB Investment Co., Ltd. (824.07K), Schonfeld Strategic Advisors LLC (401.18K).
Arcellx's 10 largest shareholders as of December 2025 include T. Rowe Price Investment Management, Inc. (16.21Mn), Gilead Sciences, Inc. (6.72Mn), Paradigm Biocapital Advisors LP (5.72Mn), VANGUARD GROUP INC (4.08Mn), FMR LLC (3.56Mn), BlackRock, Inc. (3.55Mn), NEA Management Company, LLC (3.05Mn), Vestal Point Capital, LP (2.92Mn), SR ONE CAPITAL MANAGEMENT, LP (2.35Mn), State Street Corp (2.0Mn) per Business Quant data.

214 Institutional Holders

17,137,255 Total Shares Held

Rows:

Download Data

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	160,891	4.75%	$0.00
Gilead Sciences, Inc.	31 Dec, 2025	0	0.00%	$0.00
T. Rowe Price Investment Management, Inc.	31 Dec, 2025	9,861,592	155.24%	$0.00
Barclays Plc	31 Dec, 2025	3,794	1.97%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	174,432	4.46%	$0.00
Paradigm Biocapital Advisors LP	31 Dec, 2025	1,075,000	23.12%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	186	2,325.00%	$0.00
FMR LLC	31 Dec, 2025	-2,197,589	-38.14%	$0.00
Vestal Point Capital, LP	31 Dec, 2025	1,675,000	134.00%	$0.00
NEA Management Company, LLC	31 Dec, 2025	0	0.00%	$0.00
SR ONE CAPITAL MANAGEMENT, LP	31 Dec, 2025	0	0.00%	$0.00
State Street Corp	31 Dec, 2025	472,476	30.96%	$0.00
Woodline Partners LP	31 Dec, 2025	496,435	205.66%	$0.00
CITADEL ADVISORS LLC	31 Dec, 2025	478,770	46.87%	$0.00
Affinity Asset Advisors, LLC	31 Dec, 2025	23,725	4.75%	$0.00
PERCEPTIVE ADVISORS LLC	31 Dec, 2025	-1,002,282	-40.61%	$0.00
Pictet Asset Management Holding SA	31 Dec, 2025	-78,193	-18.58%	$0.00
Jpmorgan Chase & Co	31 Dec, 2025	-310,529	-17.59%	$0.00
STEMPOINT CAPITAL LP	31 Dec, 2025	321,484	2,825.98%	$0.00
RA CAPITAL MANAGEMENT, L.P.	31 Dec, 2025	-1,769,371	-58.27%	$0.00

1 - 20 of 214

Research Tools