# EDGAR Filing Document

**Accession Number:** 0001113232
**File Stem:** 9999999995-26-000018
**Filing Date:** 2025-12
**Character Count:** 1394
**Document Hash:** 8a811047749769cd1e9a321589f68b82
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**9999999995-26-000018.hdr.sgml**: 20260102

**ACCESSION NUMBER**: 9999999995-26-000018

**CONFORMED SUBMISSION TYPE**: EFFECT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251231

**DATE AS OF CHANGE**: 20260102

**EFFECTIVENESS DATE**: 20251231

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** AXCELIS TECHNOLOGIES INC
- **CENTRAL INDEX KEY:** 0001113232
- **STANDARD INDUSTRIAL CLASSIFICATION:** SPECIAL INDUSTRY MACHINERY, NEC [3559]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 341818596
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** EFFECT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-292008
- **FILM NUMBER:** 26500019

**BUSINESS ADDRESS:**
- **STREET 1:** 108 CHERRY HILL DRIVE
- **CITY:** BEVERLY
- **STATE:** MA
- **ZIP:** 01915
- **BUSINESS PHONE:** 978-787-4000

**MAIL ADDRESS:**
- **STREET 1:** 108 CHERRY HILL DRIVE
- **CITY:** BEVERLY
- **STATE:** MA
- **ZIP:** 01915

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** EATON SEMICONDUCTOR EQUIPMENT INC
- **DATE OF NAME CHANGE:** 20000501

### UNITED STATES
### SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## Notice of Effectiveness

**Date:** December 31, 2025

**Time:** 16:00:00

**Form Type:** S-4

---

**CIK:** 0001113232

**Company Name:** AXCELIS TECHNOLOGIES INC

**File Number:** 333-292008