UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 9, 2024 Axcelis Technologies, Inc. (Exact name of registrant as specified in its charter) Delaware 000-30941 34-1818596 (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) 108 Cherry Hill Drive, Beverly, Massachusetts 01915 (Address of ...