LEDERER JAMES P 4

What Happened
James P. Lederer, a director of Entegris, was awarded 1,412 Restricted Stock Units (RSUs) on May 6, 2026. The RSUs were granted at an acquisition price of $0.00 (grant value reported as $0 at issuance) and are payable solely in Entegris common stock upon vesting. This transaction is an award/grant (code A), not an open-market purchase or sale.

Key Details

• Transaction date: May 6, 2026; Form 4 filed May 8, 2026 (timely filing).
• Grant details: 1,412 RSUs; grant price $0.00; reported dollar value $0.
• Vesting: RSUs vest in full on the earlier of (1) the first anniversary of the grant or (2) the Company's 2027 Annual Meeting of Stockholders (per footnote).
• Plan: Awards granted under the Entegris, Inc. 2020 Stock Plan to independent directors; RSUs payable solely in common stock.
• Shares owned after transaction: Not disclosed in the provided report.

Context
RSU grants to directors are a form of compensation/retention and do not represent an open-market buy or sell. These shares will convert to common stock only if and when the RSUs vest according to the schedule above; they are not immediately liquid shares.