• MKS: EVP and COO James Alan Schreiner sold 781 common shares on June 10, 2026 at USD 317.42.
• Directly held common shares fell to 22,701 following the transaction.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. MKS Inc. published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001049502-26-000107), on June 11, 2026, and is solely responsible for the information contained therein.