DOSSIER · 13F Holders · Q1 2026Healthcare · Biological Products, (No Diagnostic Substances)
ACLX

ARCELLX INC

38 institutions still hold ARCELLX INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 03940C100·Biological Products, (No Diagnostic Substances)·38 13F holders·last filed Mar 31, 2026
Market cap
—
13F value held
$699M
visible holders
Holders
38
filers reporting
Concentration
37.04%
T. Rowe Price Investment Management, Inc. #1
top holder share
AI Holders Summary · Q1 2026

38 institutions reported ACLX in Q1 2026. T. Rowe Price Investment Management, Inc. leads at 37.0% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
T. Rowe Price Investment Management, Inc.
CIK 0001897612
$259M2.3M0.18%Q1 2026
02
GLAZER CAPITAL, LLC
CIK 0001076809
$173M1.5M3.67%Q1 2026
03
TIG Advisors, LLC
CIK 0001358253
$62M541K2.87%Q1 2026
04
TUDOR INVESTMENT CORP ET AL
CIK 0000923093
$54M467K0.10%Q1 2026
05
ALLIANCEBERNSTEIN L.P.
CIK 0001109448
$35M544K0.01%Q1 2026
06
AJU IB Investment Co., Ltd.
CIK 0001710065
$26M223K84.07%Q1 2026
07
SOROS FUND MANAGEMENT LLC
CIK 0001029160
$23M200K0.25%Q1 2026
08
JANUS HENDERSON GROUP PLC
CIK 0001274173
$10M90K0.01%Q1 2026
09
CIBRA Capital Ltd
CIK 0002060725
$10M89K4.91%Q1 2026
10
Athos Capital Ltd
CIK 0001681662
$7M65K2.30%Q1 2026
11
Samsara BioCapital, LLC
CIK 0001744967
$7M61K0.68%Q1 2026
12
Twin Securities, Inc.
CIK 0001351351
$6M54K3.01%Q1 2026
13
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$6M54K0.00%Q1 2026
14
PRICE T ROWE ASSOCIATES INC /MD/
CIK 0000080255
$5M46K0.00%Q1 2026
15
DekaBank Deutsche Girozentrale
CIK 0001456228
$4M30K0.01%Q1 2026
16
Point72 Asset Management, L.P.
CIK 0001603466
$3M26K0.00%Q1 2026
17
SG Americas Securities, LLC
CIK 0001313360
$3M25K0.00%Q1 2026
18
Vestcor Inc
CIK 0001536925
$2M20K0.06%Q1 2026
19
D. E. Shaw & Co., Inc.
CIK 0001009207
$2M25K0.00%Q4 2025
20
Handelsbanken Fonder AB
CIK 0001398318
$1M13K0.01%Q1 2026
Page 1 of 2
18 more holders available. Log in →
Insiders at ARCELLX INC
Carroll Jill →Elghandour Rami →Gilson Michelle →Heery Christopher →