# EDGAR Filing Document

**Accession Number:** 0001113232
**File Stem:** 0002123863-26-000002
**Filing Date:** 2026-3
**Character Count:** 7111
**Document Hash:** 80cf794e7e93dd024af9490cfef986b6
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0002123863-26-000002.hdr.sgml**: 20260324

**ACCESSION NUMBER**: 0002123863-26-000002

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260312

**FILED AS OF DATE**: 20260324

**DATE AS OF CHANGE**: 20260324

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Ryzhik David
- **CENTRAL INDEX KEY:** 0002123863

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-30941
- **FILM NUMBER:** 26787288

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

**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

**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

## Ex-24

Exhibit 24.1

POWER OF ATTORNEY

For Executing Reports under Section 16(a)

with respect to securities of

AXCELIS TECHNOLOGIES, INC.

The undersigned hereby constitutes and appoints each of Russell J. Low, James G. Coogan, Eileen J. Evans, Lynnette C. Fallon, and Megan Gates, Esq. of the Covington & Burling law firm, each acting singly, the undersigned's true and lawful attorney-in-fact, from the date hereof until this Power of Attorney is revoked, to:

(1) execute, for and on behalf of the undersigned, Forms 3, 4 and 5 with respect to securities of Axcelis Technologies, Inc. in accordance with Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in his or her discretion; and

(2) do and perform any and all acts, for and on behalf of the undersigned, that may be necessary or desirable to complete the execution of any such Form 3, 4 or 5 and the timely filing of such form with the United States Securities and Exchange Commission and any other authority.

The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform all and every act and thing whatsoever requisite, necessary and proper to be done in the exercise of any of the rights and powers herein granted, as fully for all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or his or her substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming any of the undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of 1934.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed this 10th day of March, 2026.

---

| |
|:---|
| /s/ David Ryzhik |
| David Ryzhik |

---

Commonwealth of Massachusetts

County of Essex

On this, the 10th day of March 2026, before me, the undersigned Notary Public, appeared David Ryzhik, personally known to me, to be the person whose name was signed on the preceding document in my presence.

<u>/s/ Theresa Coffey</u>__________________<u>3/10/26</u>_______

Theresa Coffey, Notary Public

Date

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

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Ryzhik David<br><sub>(Last) (First) (Middle)</sub><br>108 CHERRY HILL DRIVE<br><sub>(Street)</sub><br>BEVERLY, MA 01915<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>AXCELIS TECHNOLOGIES INC [ ACLS ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-03-12 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director   [ ] 10% Owner<br>[X] Officer (give title below)   [ ] Other (specify below)<br>_SVP Interim CFO_ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Common Stock | 7142<sup>(1)</sup> | D |  |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) Of the shares held as of March 12, 2026, 6,349 were issuable on vesting of restricted stock units granted to the executive under the 2012 Equity Incentive Plan and are subject to forfeiture.

**Signature:** /s/ Eileen J. Evans, Attorney-in-Fact  
**Date:** 2026-03-24

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**