Axcelis director sells 1,586 shares at $157.44

Axcelis Technologies director Necip Sayiner sold common stock in an open-market transaction.

Accepted by SEC EDGAR 06/04/2026 - 05:05 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Axcelis Technologies director Necip Sayiner sold common stock in an open-market transaction. On June 3, 2026, he sold 1,586 shares at a weighted-average price of $157.4422 per share, with individual trade prices ranging from $157.41 to $157.71. Following this sale, he directly holds 7,112 shares of Axcelis common stock. Of these holdings, 2,110 shares are issuable upon vesting of restricted stock units granted under the 2012 Equity Incentive Plan and remain subject to forfeiture.

Insider Trade Summary

Net Seller: 1,586 shares

Net Sell 1 txn

Insider Sayiner Necip

Role Director

Sold 1,586 shs ($250K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,586	$157.4422	$250K

Holdings After Transaction: Common Stock — 7,112 shares (Direct)

Footnotes (2)

1. F1. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $157.4100 to $157.7100, inclusive. The reporting person undertakes to provide to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
2. F2. Of the shares held after this sale on June 3, 2026, 2,110 shares 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

Shares sold: 1,586 shares Weighted-average sale price: $157.4422 per share Price range of trades: $157.41–$157.71 per share +2 more

5 metrics

Shares sold 1,586 shares Open-market sale on June 3, 2026

Weighted-average sale price $157.4422 per share Common stock sale on June 3, 2026

Price range of trades $157.41–$157.71 per share Multiple transactions included in the reported sale

Shares held after transaction 7,112 shares Direct common stock holdings following the sale

RSU-based shares issuable 2,110 shares Issuable upon vesting of restricted stock units; subject to forfeiture

Key Terms

weighted-average price, restricted stock units, 2012 Equity Incentive Plan, open-market sale

4 terms

weighted-average price financial

"The price reported in Column 4 is a weighted-average price."

Weighted-average price is the average of multiple prices where each price is counted according to its size or importance—larger trades carry more weight than smaller ones, like averaging course grades by credit hours. It matters to investors because it gives a more realistic picture of the true price paid or received, helping assess trade execution, compare performance, calculate cost basis, and value positions more accurately than a simple average.

restricted stock units financial

"2,110 shares were issuable on vesting of restricted stock units granted to the reporting person"

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 reporting person under the 2012 Equity Incentive Plan"

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.

FAQ

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

What insider transaction did Axcelis Technologies (ACLS) report for Necip Sayiner?

Axcelis Technologies reported that director Necip Sayiner sold 1,586 shares of common stock in an open-market transaction on June 3, 2026. The sale was disclosed in a Form 4 insider trading report filed with regulators.

At what price did Necip Sayiner sell Axcelis (ACLS) shares on June 3, 2026?

Necip Sayiner sold 1,586 Axcelis shares at a weighted-average price of $157.4422 per share. According to the disclosure, individual trades occurred at prices ranging from $157.41 to $157.71 during the transaction.

How many Axcelis (ACLS) shares does Necip Sayiner hold after the reported sale?

After the June 3, 2026 sale, Necip Sayiner directly holds 7,112 shares of Axcelis common stock. This total includes shares already owned plus restricted stock units that may convert into shares upon vesting under the company’s equity plan.

What portion of Necip Sayiner’s Axcelis (ACLS) holdings are restricted stock units?

Of the 7,112 shares reported as held after the transaction, 2,110 shares are issuable upon vesting of restricted stock units under the 2012 Equity Incentive Plan. These units are subject to forfeiture if vesting conditions are not met.

How was the sale of Axcelis (ACLS) shares by Necip Sayiner executed?

The filing states the transaction was an open-market sale of common stock. The reported price is a weighted-average, reflecting multiple individual trades executed between $157.41 and $157.71 per share on June 3, 2026.

Does the Axcelis (ACLS) Form 4 mention a price range for Necip Sayiner’s sale?

Yes. The Form 4 footnote explains that the weighted-average price of $157.4422 covers multiple trades executed between $157.41 and $157.71 per share. The insider offered to provide detailed trade breakdowns to regulators upon request.

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

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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)
06/03/2026

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	06/03/2026		S		1,586	D	$157.4422(1)	7,112(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. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $157.4100 to $157.7100, inclusive. The reporting person undertakes to provide to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

2. Of the shares held after this sale on June 3, 2026, 2,110 shares 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	06/04/2026
	** 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)