Axcelis Technologies insider granted 3,115 RSUs

Rhea-AI Filing Summary

Axcelis Technologies senior vice president and interim CFO David Ryzhik received a 3,115-share award of common stock on May 15, 2026, at no cash cost, in the form of restricted stock units scheduled to vest in three equal annual installments on May 15, 2027, 2028, and 2029. On the same date, 226 shares were withheld and forfeited at $155.18 per share to cover tax obligations from a prior restricted stock unit vesting. After these equity events, he held 10,031 shares of common stock directly, with footnotes indicating that many additional shares are issuable upon future vesting and subject to forfeiture, and the transactions were not reported as conducted under a Rule 10b5-1 trading plan.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Ryzhik David

Role SVP Interim CFO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	3,115	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	226	$155.18	$35K

Holdings After Transaction: Common Stock — 10,031 shares (Direct)

Footnotes (5)

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 continuation of employment, these restricted stock units will vest as to one-third of the shares granted on each of May 15, 2027, May 15, 2028, and May 15, 2029.
2. F2. Of the shares held following this grant on May 15, 2026, 9,464 were issuable on vesting of restricted stock units granted to the executive under the 2012 Equity Incentive Plan and are subject to forfeiture.
3. F3. This forfeiture of shares for tax withholding purposes relates to the vesting on May 15, 2026 of service vesting restricted stock units granted to the executive in May 2025. The shares issued to the executive on the vesting were reduced by a number of shares having a value equal to the executive's tax withholding obligation with respect to the vested restricted stock units.
4. F4. Represents the closing price of the common stock on the date of the tax withholding.
5. F5. Of the shares held after this vesting event on May 15, 2026, 8,695 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture.

Key Figures

RSU award: 3,115 shares Tax withholding shares: 226 shares Tax withholding price: $155.18 per share +3 more

6 metrics

RSU award 3,115 shares Restricted stock unit award of common stock granted on May 15, 2026

Tax withholding shares 226 shares Shares forfeited on May 15, 2026 to cover tax obligations from prior RSU vesting

Tax withholding price $155.18 per share Closing price of common stock on the May 15, 2026 tax-withholding date

Post-transaction holdings 10,031 shares Common stock held directly by David Ryzhik after the May 15, 2026 equity events

RSUs subject to forfeiture (post-grant) 9,464 shares Shares issuable on vesting of RSUs after the May 15, 2026 grant, subject to forfeiture

RSUs subject to forfeiture (post-vesting) 8,695 shares Shares issuable on vesting of RSUs after the May 15, 2026 vesting event, subject to forfeiture

Key Terms

restricted stock units, 2012 Equity Incentive Plan, tax withholding, forfeiture

4 terms

restricted stock units financial

"These shares are issuable on vesting of restricted stock units granted"

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"

tax withholding financial

"forfeiture of shares for tax withholding purposes relates to the vesting"

Tax withholding is the practice of taking a portion of a payment—such as wages, dividends, or sale proceeds—before it reaches the recipient and sending that portion to the tax authority as an advance on the recipient’s eventual tax bill. For investors it matters because withholding reduces immediate cash received and affects after‑tax returns, estimated tax payments, and whether you may owe more or receive a refund when taxes are finally calculated, like having a small automatic savings set aside for your tax bill.

forfeiture financial

"shares were issuable on vesting ... and are subject to forfeiture"

FAQ

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

What equity award did Axcelis Technologies (ACLS) interim CFO David Ryzhik receive on May 15, 2026?

David Ryzhik received a 3,115-share award of Axcelis Technologies common stock as restricted stock units. Footnotes state these units vest in three equal annual installments on May 15, 2027, 2028, and 2029, contingent on continued employment and subject to potential forfeiture.

How many Axcelis Technologies (ACLS) shares were withheld for taxes in this insider transaction?

On May 15, 2026, 226 Axcelis Technologies shares were withheld and forfeited to satisfy tax obligations from a prior restricted stock unit vesting. The withholding price was $155.18 per share, described as the closing price of the common stock on that tax-withholding date.

When will the restricted stock units granted to Axcelis Technologies (ACLS) interim CFO on May 15, 2026 vest?

Footnotes explain that restricted stock units granted on May 15, 2026 vest in three equal tranches. One-third of the shares vest on each of May 15, 2027, May 15, 2028, and May 15, 2029, assuming continuation of employment and subject to possible forfeiture conditions.

How many Axcelis Technologies (ACLS) shares does David Ryzhik hold after these transactions?

After the May 15, 2026 grant and tax-withholding events, David Ryzhik held 10,031 Axcelis Technologies common shares directly. Footnotes also note that thousands of additional shares are issuable upon future restricted stock unit vesting and remain subject to forfeiture under the company’s equity plan.

Were David Ryzhik’s Axcelis Technologies (ACLS) transactions conducted under a Rule 10b5-1 trading plan?

The filing’s Rule 10b5-1 checkbox is not affirmed, indicating these transactions were not reported as being made under a Rule 10b5-1 trading plan. They instead reflect an equity award and related tax-withholding disposition tied to restricted stock unit grants and vestings.

What do the footnotes reveal about unvested Axcelis Technologies (ACLS) restricted stock units held by David Ryzhik?

Footnotes state that, around the May 15, 2026 events, 9,464 and then 8,695 shares were issuable upon vesting of restricted stock units and subject to forfeiture. These figures show a significant portion of his reported equity consists of unvested RSUs under the 2012 Equity Incentive Plan.

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

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Accepted by SEC EDGAR 05/19/2026 - 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^*

Ryzhik David

(Last) (First) (Middle)

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)

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

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		3,115	A	$0(1)	10,257(2)	D
Common Stock	05/15/2026		F		226	D(3)	$155.18(4)	10,031(5)	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 continuation of employment, these restricted stock units will vest as to one-third of the shares granted on each of May 15, 2027, May 15, 2028, and May 15, 2029.

2. Of the shares held following this grant on May 15, 2026, 9,464 were issuable on vesting of restricted stock units granted to the executive under the 2012 Equity Incentive Plan and are subject to forfeiture.

3. This forfeiture of shares for tax withholding purposes relates to the vesting on May 15, 2026 of service vesting restricted stock units granted to the executive in May 2025. The shares issued to the executive on the vesting were reduced by a number of shares having a value equal to the executive's tax withholding obligation with respect to the vested restricted stock units.

4. Represents the closing price of the common stock on the date of the tax withholding.

5. Of the shares held after this vesting event on May 15, 2026, 8,695 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture.

	/s/ Eileen J. Evans, Attorney-in-Fact	05/19/2026
	** 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)