Arkolith/Insider Trading/ARM/Form 4

Grisenthwaite Richard Roy

Chief ArchitectARM HOLDINGS PLC /UK (ARM) · full profile →Form 4 · filed May 19, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$5.1M
Net Open-Market Flow
-$5.1M
Transactions
15
9 non-derivative · 6 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
May 18, 2026Sell(S)24K$209.15$5.1M0
May 15, 2026Option exercise(M)2K——8K
May 15, 2026Option exercise(M)15K——22K
May 15, 2026Grant(A)4K——26K
May 15, 2026Option exercise(M)2K——28K
May 15, 2026Grant(A)13K——41K
May 15, 2026Option exercise(M)4K——46K
May 15, 2026Tax withholding(F)21K$209.16$4.5M24K
May 15, 2026Grant(A)5K——6K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
May 15, 2026Grant(A)7K—$0106K
May 15, 2026Grant(A)35K—$0141K
May 15, 2026Option exercise(M)2K—$0139K
May 15, 2026Option exercise(M)15K—$0124K
May 15, 2026Option exercise(M)2K—$0123K
May 15, 2026Option exercise(M)4K—$0118K

Transaction Codes

S
Open-market sale
M
Option exercise / conversion
A
Grant / award
F
Shares withheld for taxes

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001973239-26-000076) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML