Trade Summary

Yesterday, Williams John Edward, serving as EVP & GM, PSD at MKS INC (MKSI), sold 457 shares at $288.31 per share, for a total transaction value of $131,757.67. Following this transaction, Williams John Edward now holds 4,098 shares of MKSI.

This sale represents a 10.03% decrease in Williams John Edward's stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Monday, August 3, 2026 and publicly disclosed via SEC Form 4 filing on Tuesday, August 4, 2026 at 12:21 PM ET, 1 day after the trade was made.

MKS INC operates in the TECHNOLOGY sector, specifically within the SCIENTIFIC & TECHNICAL INSTRUMENTS industry. Insider selling activity in this sector can provide valuable signals about industry trends and company-specific developments.