CANNONE PETER III 4

What Happened
Peter Cannone III, a director of MKS Inc (MKSI), sold 1,250 shares in an open-market transaction on February 20, 2026. The sale was reported at a weighted average price of $258.06 per share, resulting in gross proceeds of approximately $322,575. This was a sale (disposition), which is often routine insider liquidity rather than a direct signal about company fundamentals.

Key Details

• Transaction date: 2026-02-20; Form 4 filed: 2026-02-23 (filed within the typical 2-business-day reporting window).
• Price: weighted average sale price $258.06; executed in multiple trades at prices ranging from $258.040 to $258.285.
• Shares sold: 1,250; reported gross proceeds ≈ $322,575.
• Shares owned after transaction: not specified in the provided filing details.
• Footnote: Reporting person offers to provide the full breakdown of the number of shares and individual trade prices upon request (see footnote F1).

Context: This report documents a straightforward open-market sale by a company director. Sales by insiders can be for many personal reasons and do not, by themselves, prove a change in company outlook.