Axcelis (ACLS) director sells 1,789 shares, holding 11,400 after sale

Rhea-AI Filing Summary

Axcelis Technologies director Jeanne Quirk executed an open-market sale of 1,789 shares of Common Stock at $140.22 per share. After this transaction, she directly holds 11,400 shares, including 1,440 shares issuable upon vesting of restricted stock units granted under the 2012 Equity Incentive Plan that remain subject to forfeiture.

Insider Trade Summary

Net Seller: 1,789 shares ($250,854)

Net Sell 1 txn

Insider Quirk Jeanne

Role null

Sold 1,789 shs ($251K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,789	$140.22	$251K

Holdings After Transaction: Common Stock — 11,400 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 1,789 shares Sale price per share: $140.22 per share Shares held after transaction: 11,400 shares +1 more

4 metrics

Shares sold 1,789 shares Open-market sale of Common Stock on May 19, 2026

Sale price per share $140.22 per share Price for the 1,789 shares sold

Shares held after transaction 11,400 shares Direct holdings following the reported sale

RSUs included in holdings 1,440 shares Issuable upon vesting of restricted stock units under 2012 Equity Incentive Plan

Key Terms

open-market sale, restricted stock units, 2012 Equity Incentive Plan, Form 4

4 terms

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

restricted stock units financial

"1,440 were 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 to the director under the 2012 Equity Incentive Plan"

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Form 4 Insider Transactions: What Each Field Means →

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^*

Quirk Jeanne

(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)
05/19/2026

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	05/19/2026		S		1,789	D	$140.22	11,400(1)	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. Of the shares held after this sale on May 19, 2026, 1,440 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	05/20/2026
	** 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)

FAQ

What insider transaction did Axcelis Technologies (ACLS) report for Jeanne Quirk?

Axcelis Technologies reported that director Jeanne Quirk sold 1,789 shares of Common Stock in an open-market transaction at $140.22 per share. This Form 4 filing reflects a routine insider sale rather than a compensation grant or option exercise.

How many Axcelis (ACLS) shares does Jeanne Quirk hold after this Form 4 sale?

Following the sale, Jeanne Quirk directly holds 11,400 shares of Axcelis Common Stock. This total includes 1,440 shares issuable upon vesting of restricted stock units that were granted under the company’s 2012 Equity Incentive Plan and are still subject to forfeiture.

At what price did Jeanne Quirk sell Axcelis (ACLS) shares in this transaction?

Jeanne Quirk sold 1,789 Axcelis Common Stock shares at $140.22 per share in an open-market sale. The transaction code “S” in the Form 4 identifies it as a sale in the open market or a private transaction, rather than an award or option exercise.

Does Jeanne Quirk’s Axcelis (ACLS) holding include restricted stock units?

Yes. Of the 11,400 shares reported as held after the sale, 1,440 are issuable upon vesting of restricted stock units granted under the 2012 Equity Incentive Plan. These RSUs are subject to forfeiture until vesting conditions are satisfied.

What does the transaction code on Jeanne Quirk’s Axcelis (ACLS) Form 4 indicate?

The Form 4 uses transaction code “S,” which indicates a sale of Common Stock in the open market or a private transaction. The filing further classifies this as an open-market sale, distinguishing it from grants, gifts, tax withholdings, or derivative exercises.