Members of Congress who disclosed trading MKSI

MKS Instruments Inc CMN (MKSI)

4 members of Congress reported a total of 33 transactions in MKS Instruments Inc CMN (MKSI) on their STOCK Act periodic transaction reports between July 18, 2018 and October 31, 2025: 18 purchases, 15 sales.

Each filing reports a dollar range, not an amount, so this page counts filings and prints every range exactly as filed. No total is calculated anywhere on this page, because the disclosures do not support one.