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SIMPLEX TRADING, LLC

Position in ARM — Arm Holdings PLC /Uk

CIK 1488542 CHICAGO, IL

Position in ARM

as of Jun 30, 2026 · filed Aug 12, 2026
Position Value
$860,895
-$3,899,130 QoQ
Shares Held
2,428
-92.3% QoQ
Ownership
0.000%
of shares outstanding
% of Portfolio
0.03%
of 13F equity value
Holder Rank
#505
of 955 holders
Holding Since
Jun 2024
8 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in ARM Over Time

Shares Held

Position Value (USD)

Position in Semiconductors

Technology · as of Jun 30, 2026

SIMPLEX TRADING, LLC holds $567,512,441 across 43 Semiconductors names. ARM ranks #19 (0.2% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in ARM

Export CSV
8 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $860,895 2,428
2026-03-31 $4,760,025 31,465
2025-12-31 $16,769,902 153,416
2025-09-30 $3,825,323 27,036
2025-03-31 $26,999,074 252,824
2024-12-31 $22,920,534 185,802
2024-09-30 $38,290,784 267,749
2024-06-30 $23,757,133 145,197