Vanguard Capital Management Acquires 5.24% Stake in MKS Inc (MKSI)

Vanguard Capital Management LLC filed a Schedule 13G on April 30, 2026, reporting a new 5.24% ownership stake in MKS Inc (MKSI). As of the event date on March 31, 2026, Vanguard beneficially owns 3,528,836 shares of common stock. The filing indicates that Vanguard holds sole dispositive power over all 3,528,836 shares, while maintaining sole voting power over 514,635 shares. This position includes holdings across various Vanguard affiliates, including Vanguard Asset Management Limited and Vanguard Global Advisers, LLC. The securities were acquired in the ordinary course of business, and the filing confirms that the acquisition was not intended to change or influence control of the issuer. This marks a significant increase from a previous ownership level of 0.0%, establishing Vanguard as a major institutional shareholder in the Andover-based technology company.