CANNONE PETER III 4

What Happened
Peter Cannone III, a director of MKS Inc (MKSI), reported the sale of 1,350 shares on May 18, 2026. The shares were disposed at $303.40 per share for total proceeds of $409,590. The transaction is reported as a sale (code S), listed as an open-market or private sale.

Key Details

• Transaction date: 2026-05-18; Report filed: 2026-05-19 (timely filing).
• Price: $303.40 per share; Shares sold: 1,350; Gross proceeds: $409,590.
• Shares owned after transaction: not specified in the details provided.
• No 10b5-1 trading plan, tax withholding, or other footnotes were disclosed in the provided filing excerpt.
• Filing timeliness: filed the next day (appears timely under Form 4 rules).

Context
This was a straight sale by a company director. Sales by insiders can be routine (diversification, liquidity, or scheduled sales) and do not by themselves prove a change in sentiment about the company. No indication in the provided data that this was an option exercise, gift, or part of a disclosed trading plan.