Exhibit 99.1 News Release Axcelis Announces Financial Results for First Quarter 2026 Q1 2026 Highlights: BEVERLY, Mass., May 7, 2026—Axcelis Technologies, Inc. (Nasdaq: ACLS) today announced financial results for the first quarter ended March 31, 2026. Senior Vice President and Interim CFO David Ryzhik stated, "We ended the first quarter with a strong balance sheet, including approximately $570 million of cash, and continued to generate attractive free cash flow, providing ample flexibility to fund our grow ...