Burke Kathleen Flaherty 4

What Happened
Burke Kathleen Flaherty, EVP, General Counsel & Secretary of MKS Inc (MKSI), sold 4,254 shares in an open-market transaction on February 20, 2026, at $250.00 per share, for total proceeds of $1,063,500. This was a sale (not a purchase or option exercise) and does not by itself indicate the insider’s view on the company’s prospects.

Key Details

• Transaction date: 2026-02-20
• Transaction type/code: Sale (S) — open market or private sale
• Price per share: $250.00; Shares sold: 4,254; Total proceeds: $1,063,500
• Filing date (Form 4): 2026-02-23 (filed within the standard 2-business-day window)
• Shares owned after transaction: Not specified in the provided filing excerpt
• Footnotes/plan mention: No 10b5-1 plan, tax withholding, or other special footnotes were included in the supplied details

Context
Sales by executives are common for liquidity or portfolio-management reasons and are not definitive indicators of company performance. Purchases tend to be a stronger signal of insider conviction; this record documents a routine sale. If you want to assess insider sentiment further, look for patterns over time (multiple insiders buying or selling) or additional filings that disclose post-transaction holdings or trading plans.