ARM CFO Jason Child Sells 10,400 Shares

What Happened
Jason Child, Chief Financial Officer of Arm Holdings plc (ARM), sold 10,400 American Depositary Shares (ADSs) on September 21, 2026, at $300.00 per share, resulting in gross proceeds of $3,120,000. The disclosure lists the transaction as an open-market or private sale; the filing indicates the sale was effected under a Rule 10b5-1 trading plan.

Key Details

• Transaction date: 2026-09-21; Filing date: 2026-09-23. No indication in the filing excerpt that the report was late.
• Transaction type/amount: Sale of 10,400 ADSs at $300.00 per share; total value $3,120,000.
• ADS/ordinary share note: Each ADS represents one ordinary share (ordinary shares nominal value £0.001).
• 10b5-1 plan: Trade was effected pursuant to a Rule 10b5-1 plan adopted May 22, 2026 (prearranged trading plan).
• Shares owned after transaction: Not specified in the provided filing excerpt.
• Additional note: Filing footnote reports inclusion of 10 ordinary shares acquired under Arm’s 2024 Employee Stock Purchase Plan on Aug 31, 2026 (likely relates to holdings reporting).

Context
Sales executed under 10b5-1 plans are typically prearranged and do not necessarily indicate a change in the insider’s view of the company. For retail investors, purchases tend to be more informative about insider bullishness; routine sales by executives (including to diversify or meet tax/liquidity needs) are common. This disclosure is factual—no motive is stated.