13F Insight
DOSSIER · 13F Holders · Q3 2026

ARM HOLDINGS PLC

15 institutions still hold ARM HOLDINGS PLC as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 042068905·15 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$1.5B
visible holders
Holders
15
filers reporting
Concentration
52.44%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

15 institutions reported ARM HOLDINGS PLC in Q3 2026. IMC-Chicago, LLC leads at 52.4% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
IMC-Chicago, LLC
CIK 0001452861· Market maker
$791M2.7M0.16%Q3 202602
Optiver Holding B.V.
CIK 0001859606· Market maker
$205M579K0.06%Q2 202603
SIMPLEX TRADING, LLC
CIK 0001488542
$191M658K0.10%Q3 202604
GROUP ONE TRADING LLC
CIK 0000932540
$169M585K0.23%Q3 202605
JPMORGAN CHASE & CO
CIK 0000019617
$74M254K0.00%Q3 202606
CMT Capital Markets Trading GmbH
CIK 0001632813
$26M170K0.27%Q1 202607
HRT FINANCIAL LP
CIK 0001475597
$24M216K0.07%Q4 202508
DV Trading LLC
CIK 0001721757
$18M116K0.41%Q1 202609
Capital Markets Trading UK LLP
CIK 0001719165
$10M66K0.13%Q1 202610
HERITAGE OAK WEALTH ADVISORS LLC
CIK 0002035533
$579K2K0.18%Q3 202611
SG Americas Securities, LLC
CIK 0001313360
$273K80K0.00%Q1 202612
PRAKASH INVESTMENT ADVISORS LLC
CIK 0002054677
$255K230.15%Q3 202613
Miracle Mile Advisors, LLC
CIK 0001585859
$206K7000.00%Q3 202614
OSAIC HOLDINGS, INC.
CIK 0001677044
$11K10.00%Q3 202615
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025