Axcelis director sells 3,225 company shares

Axcelis Technologies director Gregory B. Graves reported selling 3,225 shares of common stock on May 19, 2026 in two open-market transactions.

Rhea-AI Filing Summary

Axcelis Technologies director Gregory B. Graves reported selling 3,225 shares of common stock on May 19, 2026 in two open-market transactions. He sold 2,625 shares at a weighted-average price of $141.4051 per share and 600 shares at a weighted-average price of $142.5146 per share. The prices reflect multiple trades within narrow ranges around those averages. Following these sales, he continues to hold shares, including 2,110 shares issuable upon vesting of restricted stock units granted under the 2012 Equity Incentive Plan, which remain subject to forfeiture.

Insider Trade Summary

Net Seller: 3,225 shares

Net Sell 2 txns

Insider GRAVES GREGORY B

Role Director

Sold 3,225 shs ($457K)

Type	Security	Shares	Price	Value
Sale	Common Stock	2,625	$141.4051	$371K
Sale	Common Stock	600	$142.5146	$86K

Holdings After Transaction: Common Stock — 5,473 shares (Direct)

Footnotes (4)

1. F1. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $141.3301 to $141.6000, 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 May 19, 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.
3. F3. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $142.4400 to $142.6400, 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.
4. F4. Of the shares held after this sale on May 19, 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

Total shares sold: 3,225 shares First sale average price: $141.4051 per share Second sale average price: $142.5146 per share +3 more

6 metrics

Total shares sold 3,225 shares Open-market sales on May 19, 2026

First sale average price $141.4051 per share 2,625 shares of common stock

Second sale average price $142.5146 per share 600 shares of common stock

Price range first sale $141.3301–$141.6000 Multiple trades combined into weighted average

Price range second sale $142.4400–$142.6400 Multiple trades combined into weighted average

RSU-linked shares 2,110 shares Issuable upon vesting; 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 Gregory B. Graves?

Axcelis director Gregory B. Graves reported selling 3,225 shares of common stock. The Form 4 shows two open-market sales on May 19, 2026, at weighted-average prices around $141–$143 per share, reducing but not eliminating his equity position.

At what prices did Gregory B. Graves sell Axcelis (ACLS) shares on May 19, 2026?

Graves sold 2,625 Axcelis shares at a weighted-average price of $141.4051 and 600 shares at $142.5146. Footnotes explain each average reflects multiple trades within narrow intraday price ranges around those figures.

How many Axcelis (ACLS) shares did Gregory B. Graves sell in total?

The Form 4 reports total sales of 3,225 Axcelis common shares. These came from two same-day open-market transactions: 2,625 shares in one trade grouping and 600 shares in another, both executed on May 19, 2026.

Does Gregory B. Graves still hold Axcelis (ACLS) equity after these sales?

Yes. The filing indicates he continues to hold Axcelis equity after the sales. Footnotes note that 2,110 of his post-sale shares are issuable upon vesting of restricted stock units granted under the 2012 Equity Incentive Plan and remain subject to forfeiture.

What do the weighted-average prices in the Axcelis (ACLS) Form 4 mean?

Weighted-average prices reflect multiple trades combined into a single reported figure. The filing notes Graves’ shares were sold in several transactions within specified price ranges, and he will provide exact per-trade details to regulators upon request if needed.

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

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Accepted by SEC EDGAR 05/20/2026 - 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^*

GRAVES GREGORY B

(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		2,625	D	$141.4051(1)	6,073(2)	D
Common Stock	05/19/2026		S		600	D	$142.5146(3)	5,473(4)	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 $141.3301 to $141.6000, 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 May 19, 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.

3. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $142.4400 to $142.6400, 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.

4. Of the shares held after this sale on May 19, 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	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)