InsiderTrades

Grisenthwaite Richard Roy

SEC CIK 2112445 · EDGAR

Buying vs selling by month open-market trades, last 24 months, ARM
BoughtSold

Companies

TickerCompanyTitleHoldingBoughtSoldTradesFirstLast
ARMARM HOLDINGS PLC /UKChief Architect 0 — $5.09M 42026-05-152026-05-18

Most active insiders at ARM, 12 months

#InsiderTitleBoughtSold
1 Child JasonCFO —$19.99M
2 Collins SpencerCLO —$19.80M
3 Abbey WilliamChief Commercial Off —$12.02M
4 Haas Rene A.CEO, Dir —$6.63M
5 Grisenthwaite Richard RoyChief Architect —$5.09M
6 Bartels Laura KathleenCAO —$4.44M
7 Eaton Charlotte ClaireCHRO —$4.18M
8 Sine JeffreyDir ——
9 Schooler RosemaryDir ——
10 SOHN YOUNGDir ——

Transactions 4

Type
Reset
X Filed Traded Ticker Company Insider Title Type Price Qty Owned ΔOwn Value
DM 2026-05-19 17:20 2026-05-15 ARM ARM HOLDINGS PLC /UK Grisenthwaite Richard Roy Chief Architect A - Grant — +22.7K 41.3K +122% —
DM 2026-05-19 17:20 2026-05-15 ARM ARM HOLDINGS PLC /UK Grisenthwaite Richard Roy Chief Architect M - OptEx — +22.6K 45.6K +98% —
D 2026-05-19 17:20 2026-05-15 ARM ARM HOLDINGS PLC /UK Grisenthwaite Richard Roy Chief Architect F - Tax $209.16 -21.3K 24.3K -47% -$4.46M
D 2026-05-19 17:20 2026-05-18 ARM ARM HOLDINGS PLC /UK Grisenthwaite Richard Roy Chief Architect S - Sale+OE $209.15 -24.3K 0 -100% -$5.09M

Purchase Sale Sale after option exercise All abbreviations