FOSTER RONALD C 4

What Happened
Ronald C. Foster, a director of Advanced Energy Industries, received a grant of 587 restricted stock units (RSUs) on May 7, 2026. The award was reported as a derivative acquisition at $0.00 per unit (total reported value $0) and represents the equity portion of the non-employee director retainer.

Key Details

• Transaction type: Award/Grant (code A) of 587 RSUs on 2026-05-07. Report filed 2026-05-08.
• Price reported: $0.00 per unit; total reported acquisition value: $0.
• Vesting: RSUs vest on the one-year anniversary of the grant (May 7, 2027) contingent on continued service as a director (Footnote F1).
• RSU terms: Not exercisable and have no expiration date (Footnote F2).
• Shares owned after transaction: Not disclosed in the provided filing.
• Timeliness: Filing was submitted the day after the grant (within the typical Form 4 reporting window).

Context
This grant is a routine equity retainer for a non-employee board member under the company's 2023 Amended and Restated Omnibus Incentive Plan. Such awards are compensation, not open-market purchases or sales, and vest only if the director remains in service.