Management Change/Compensation, Changes in Control (Form 8-K)

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On April 24, 2026, the Board of Directors of Amtech Systems, Inc. (the "Company") approved the appointment of Mr. Thomas Sabol as the Company's Chief Financial Officer, effective May 14, 2026, reporting to the Chief Executive Officer of the Company. In this role, Mr. Sabol will also serve as the Company's principal accounting officer and principal financial officer, effective as of the same date. Mr. Sabol will replace Mr. Mark Weaver, who was serving as Interim Chief Financial Officer until the Company hire a permanent Chief Financial Officer.

Mr. Sabol, age 67, has more than 30 years of senior financial leadership experience, including over 20 years as a chief financial officer of public and private companies, with significant experience in electronics manufacturing, electronic payments, software, and technology-enabled businesses.

Mr. Sabol previously served as Interim Chief Financial Officer and Head of HR with Korn Ferry Executive Interim Services practice from August 2025 to May 2026. From May 2023 to May 2026, Mr. Sabol also served as a consultant to various companies, providing CFO and other support services. From October 2021 through March 2023, Mr. Sabol served as Chief Financial Officer of Corcentric Inc and from November 2019 through December 2020, Mr. Sabol served as Chief Financial Officer at Transact Campus Inc. From November 2016 through November 2019, Mr. Sabol served as Chief Financial Officer of Rimini Street, Inc., where he led the company through its initial public offering and managed SEC reporting, internal controls, and investor relations.

Earlier in his career, Mr. Sabol served at Plexus Corp., a publicly traded global electronic manufacturing services company, initially as Chief Financial Officer from 1996 through 2002 and subsequently as Chief Operating Officer and Executive Vice President from 2002 through 2003, during a period that included international expansion and multiple acquisitions.

Mr. Sabol began his career at Coopers & Lybrand, where he served as a Senior Audit Manager, including participation in several initial public offerings and service in the firm's SEC National Office. He is a Certified Public Accountant and holds a Bachelor of Arts in Accounting from Marquette University.

In connection with Mr. Sabol's appointment, the Company entered into an offer letter with Mr. Sabol, dated April 17, 2026 (the "Offer Letter"). Under the terms of the Offer Letter, Mr. Sabol will receive an annual base salary of $350,000, and will be eligible to participate in the Company's annual incentive bonus program with a target bonus of 50% of base salary (60% cash, 40% restricted stock). Mr. Sabol will also receive a grant of 45,000 stock options, subject to Board approval, vesting in three equal annual installments on the one year, two year and three year anniversary dates of the grant date. In the event of a Change in Control (as defined in the Offer Letter), Mr. Sabol will be entitled to cash severance equal to twelve months of base salary and 100% acceleration of unvested equity awards. Upon termination without Cause (as defined in the Offer Letter), Mr. Sabol is entitled to three months of base salary. Mr. Sabol's Offer Letter is an at-will arrangement. The foregoing description of the Offer Letter is qualified in its entirety by reference to the full text of the letter, a copy of which is filed as Exhibit 10.1 hereto and incorporated herein by reference.

There are no arrangements or understandings between Mr. Sabol and any other person pursuant to which Mr. Sabol was appointed Chief Financial Officer. Mr. Sabol has no family relationship with any director or other executive officer of the Company, and has no direct or indirect material interest in any transaction required to be disclosed pursuant to Item 404(a) of Regulation S-K.

Item 9.01 Financial Statements and Exhibits.