Axcelis director granted 1,440 RSUs

Sayiner Necip reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Sayiner Necip reported acquisition or exercise transactions in this Form 4 filing.

Axcelis Technologies director Necip Sayiner reported an equity compensation grant. He was awarded 1,440 shares of common stock in the form of restricted stock units under the company’s 2012 Equity Incentive Plan on May 15, 2026. These units will vest on May 15, 2027, assuming he completes his current Board term. Following the award, he directly holds 8,698 shares, and of the shares held as of May 15, 2026, 2,110 are restricted stock units that remain subject to forfeiture.

Insider Trade Summary

Grant/Award: 1,440 shares

Grant/Award 1 txn

Insider Sayiner Necip

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	1,440	$0.00	$0.00

Holdings After Transaction: Common Stock — 8,698 shares (Direct)

Footnotes (2)

1. F1. These shares are issuable on vesting of restricted stock units granted under the Company's 2012 Equity Incentive Plan on May 15, 2026. Assuming completion of the director's current term of service on the Board of Directors, these restricted stock units will vest on May 15, 2027.
2. F2. Of the shares held as of May 15, 2026, 2,110 were issuable on vesting of restricted stock units granted to the director under the 2012 Equity Incentive Plan and are subject to forfeiture.

Key Figures

RSUs granted: 1,440 shares Shares held after transaction: 8,698 shares RSUs subject to forfeiture: 2,110 shares +1 more

4 metrics

RSUs granted 1,440 shares Restricted stock units granted on May 15, 2026

Shares held after transaction 8,698 shares Total direct holdings following the grant

RSUs subject to forfeiture 2,110 shares Issuable on vesting as of May 15, 2026

RSU vesting date May 15, 2027 Vesting date for 1,440 restricted stock units

Key Terms

restricted stock units, 2012 Equity Incentive Plan, subject to forfeiture, Board of Directors

4 terms

restricted stock units financial

"These shares are issuable on vesting of restricted stock units granted under the Company's 2012 Equity Incentive Plan"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

2012 Equity Incentive Plan financial

"restricted stock units granted under the Company's 2012 Equity Incentive Plan on May 15, 2026"

subject to forfeiture financial

"2,110 were issuable on vesting of restricted stock units ... and are subject to forfeiture"

Board of Directors financial

"Assuming completion of the director's current term of service on the Board of Directors, these restricted stock units will vest"

The Board of Directors is a group of people chosen by a company's owners to help make big decisions and oversee how the company is run. They act like a team of advisors or managers, making sure the company stays on track and meets its goals. Their choices can influence the company's success and how it grows.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Axcelis (ACLS) director Necip Sayiner report in this Form 4?

Necip Sayiner reported receiving an equity grant of Axcelis stock. He was awarded 1,440 restricted stock units under the 2012 Equity Incentive Plan, increasing his direct holdings to 8,698 shares, including units that will vest in the future and remain subject to forfeiture.

How many Axcelis (ACLS) shares did the director acquire in this transaction?

The director acquired 1,440 shares through a restricted stock unit grant. These units represent common stock issuable upon vesting and are part of his overall direct holdings reported after the transaction, which total 8,698 shares of Axcelis common stock.

When do Necip Sayiner’s new Axcelis (ACLS) restricted stock units vest?

The newly granted restricted stock units are scheduled to vest on May 15, 2027. Vesting is conditioned on the completion of the director’s current term of service on the Axcelis Board of Directors, as described in the Form 4 footnote disclosure.

How many Axcelis (ACLS) shares does the director hold after this grant?

After the grant, the director’s direct holdings total 8,698 shares. This amount includes shares issuable upon vesting of restricted stock units, some of which are still subject to forfeiture under the terms of Axcelis’s 2012 Equity Incentive Plan.

How many of Necip Sayiner’s Axcelis (ACLS) shares are still at risk of forfeiture?

2,110 shares are described as issuable upon vesting and subject to forfeiture. These shares relate to restricted stock units granted under the 2012 Equity Incentive Plan and are part of the director’s reported holdings as of May 15, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/18/2026 - 05:05 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Sayiner Necip

(Last) (First) (Middle)

C/O AXCELIS TECHNOLOGIES, INC.

108 CHERRY HILL DRIVE

(Street)

BEVERLY MASSACHUSETTS 01915

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
AXCELIS TECHNOLOGIES INC [ ACLS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/15/2026		A		1,440	A	$0(1)	8,698(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. These shares are issuable on vesting of restricted stock units granted under the Company's 2012 Equity Incentive Plan on May 15, 2026. Assuming completion of the director's current term of service on the Board of Directors, these restricted stock units will vest on May 15, 2027.

2. Of the shares held as of May 15, 2026, 2,110 were issuable on vesting of restricted stock units granted to the director under the 2012 Equity Incentive Plan and are subject to forfeiture.

	/s/ Eileen J. Evans, Attorney-in-Fact	05/18/2026
	** Signature of Reporting Person	Date
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.
* Form 4: SEC 1474 (03-26)