Form 4: MKS Instruments Director Joseph B. Donahue Reports Acquisition and Disposal of Common Stock

Director Joseph B. Donahue reports changes in beneficial ownership of MKS Instruments Inc. common stock, including acquisition of restricted stock units and disposal of shares.

Summary

• On May 12, 2025, Joseph B. Donahue, a director of MKS Instruments Inc., reported transactions involving the company's common stock.
• Donahue acquired 2,479.339 shares of common stock through restricted stock units.
• He also disposed of 11,350.745 shares of common stock.
• The restricted stock units vest fully the day before the first annual shareholder meeting following the grant date, or 13 months after the grant date if no meeting occurs within that timeframe.
• Each restricted stock unit represents the right to receive one share of MKS Instruments Inc. common stock.

Sentiment

Score: 5

Explanation: This is a neutral report of stock transactions by a company director. It doesn't inherently indicate positive or negative sentiment about the company's performance.

Industry Context

This filing is a routine disclosure of insider transactions, which are common in publicly traded companies. These transactions are closely monitored by investors for insights into management's perspective on the company's prospects.

Stakeholder Impact

• Shareholders may be interested in the transactions of company insiders as an indicator of management's confidence in the company.

Key Dates

Keywords

MKS Instruments, Director, Joseph B. Donahue, Form 4, Beneficial Ownership, Restricted Stock Units, Common Stock, MKSI