Vanguard Capital Management Establishes 5.2% Stake in Materion Corp (MTRN)

On April 30, 2026, Vanguard Capital Management LLC filed a Schedule 13G with the SEC, reporting a new 5.2% ownership stake in Materion Corp (MTRN). As of the event date on March 31, 2026, Vanguard Capital Management beneficially owns 1,083,201 shares of Materion's common stock. This position represents a significant increase from a previous 0.0% holding, establishing Vanguard as a major institutional investor in the company. The filing indicates that Vanguard holds sole dispositive power over all 1,083,201 shares, while possessing sole voting power over 155,343 shares. The shares were acquired in the ordinary course of business and not for the purpose of influencing or changing the control of the issuer. The reported holdings include shares managed by various Vanguard affiliates, such as Vanguard Asset Management Limited and Vanguard Global Advisers, LLC. Materion Corp, headquartered in Mayfield Heights, Ohio, is the issuer of the securities. This filing marks Vanguard's crossing of the 5% beneficial ownership threshold.