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Axcelis (ACLS) EVP Greg Redinbo granted RSUs and withholds shares for taxes

Filing Impact
(Moderate)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Axcelis Technologies EVP Greg Redinbo reported new equity awards and routine tax withholding transactions. On May 15, 2026, he received two grants of 3,115 shares of common stock each as restricted stock units under the 2012 Equity Incentive Plan. One grant vests in three annual installments in 2027, 2028, and 2029, while the other can earn from 0%–200% of the granted units based on relative total shareholder return for January 1, 2026–December 31, 2028, with earned shares vesting in 2029. The filing also records forfeitures totaling 839 shares at $155.18 per share to satisfy tax withholding on previously granted RSUs that vested in 2023–2025. After these events, Redinbo continues to hold more than 32,000 shares of Axcelis common stock, including a significant number of unvested RSUs subject to forfeiture.

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Insider Redinbo Greg
Role EVP MARKETING AND APPLICATIONS
Type Security Shares Price Value
Grant/Award Common Stock 3,115 $0.00 --
Grant/Award Common Stock 3,115 $0.00 --
Tax Withholding Common Stock 452 $155.18 $70K
Tax Withholding Common Stock 210 $155.18 $33K
Tax Withholding Common Stock 177 $155.18 $27K
Holdings After Transaction: Common Stock — 32,938 shares (Direct, null)
Footnotes (1)
  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. Of the shares held following this grant on May 15, 2026, 20,867 were issuable on vesting of restricted stock units granted to the executive under the 2012 Equity Incentive Plan and are subject to forfeiture. These shares are issuable on vesting of restricted stock units granted under the Company's 2012 Equity Incentive Plan on May 15, 2026. In this grant, the executive may earn shares of common stock, ranging from zero to 200% of the granted units. The shares are earned based on the achievement of performance goals based on relative total shareholder return over a performance period of January 1, 2026 to December 31, 2028. Assuming continuation of employment, 100% of the earned shares will vest on measurement of performance in 2029. Unearned restricted stock units will forfeit at such time. Of the shares held after this grant on May 15, 2026, 23,982 shares were issuable on vesting of restricted stock units granted to the executive under the 2012 Equity Incentive Plan and are subject to forfeiture. 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. Represents the closing price of the common stock on the date of the tax withholding. Of the shares held after this vesting event on May 15, 2026, 22,445 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture. 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 2024. 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. Of the shares held after this vesting event on May 15, 2026, 21,732 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture. 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 2023. 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. Of the shares held after this vesting event on May 15, 2026, 21,131 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture.
Time-based RSU grant 3,115 shares Restricted stock units granted on May 15, 2026 with annual vesting
Performance RSU grant 3,115 shares Performance-based RSUs granted May 15, 2026, payout 0%–200% on TSR
Tax withholding shares 839 shares Shares forfeited for tax withholding on RSU vesting May 15, 2026
Withholding price $155.18 per share Closing price used to value shares withheld for taxes
Post-transaction holdings >32,000 shares Common stock held by Greg Redinbo after grants and forfeitures
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
"granted under the Company's 2012 Equity Incentive Plan on May 15, 2026"
relative total shareholder return financial
"performance goals based on relative total shareholder return over a performance period"
Relative total shareholder return measures how much an investor’s gain from a company — including stock price changes and dividends — beats or lags a chosen benchmark or peer group over a set time. Think of it as a race: it shows whether the company outpaced rivals or the market, which helps investors and boards judge performance, compare returns fairly, and link results to pay or investment decisions.
tax withholding financial
"forfeiture of shares for tax withholding purposes relates to the vesting on May 15, 2026"
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 of restricted stock units ... and are subject to forfeiture"
Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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*
Redinbo Greg
(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)
Director10% Owner
XOfficer (give title below)Other (specify below)
EVP MARKETING AND APPLICATIONS
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock05/15/2026A3,115A$0(1)32,938(2)D
Common Stock05/15/2026A3,115A$0(3)36,053(4)D
Common Stock05/15/2026F452D(5)$155.18(6)35,601(7)D
Common Stock05/15/2026F210D(8)$155.18(6)35,391(9)D
Common Stock05/15/2026F177D(10)$155.18(6)35,214(11)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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount 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, 20,867 were issuable on vesting of restricted stock units granted to the executive under the 2012 Equity Incentive Plan and are subject to forfeiture.
3. These shares are issuable on vesting of restricted stock units granted under the Company's 2012 Equity Incentive Plan on May 15, 2026. In this grant, the executive may earn shares of common stock, ranging from zero to 200% of the granted units. The shares are earned based on the achievement of performance goals based on relative total shareholder return over a performance period of January 1, 2026 to December 31, 2028. Assuming continuation of employment, 100% of the earned shares will vest on measurement of performance in 2029. Unearned restricted stock units will forfeit at such time.
4. Of the shares held after this grant on May 15, 2026, 23,982 shares were issuable on vesting of restricted stock units granted to the executive under the 2012 Equity Incentive Plan and are subject to forfeiture.
5. 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.
6. Represents the closing price of the common stock on the date of the tax withholding.
7. Of the shares held after this vesting event on May 15, 2026, 22,445 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture.
8. 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 2024. 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.
9. Of the shares held after this vesting event on May 15, 2026, 21,732 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture.
10. 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 2023. 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.
11. Of the shares held after this vesting event on May 15, 2026, 21,131 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-Fact05/19/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did Axcelis (ACLS) EVP Greg Redinbo report?

Greg Redinbo reported new equity awards and tax-related forfeitures. On May 15, 2026, he received two restricted stock unit grants of 3,115 shares each and forfeited 839 shares at $155.18 per share to cover tax withholding on prior RSU vesting.

How many Axcelis (ACLS) shares were granted to Greg Redinbo in RSU awards?

Redinbo received two restricted stock unit awards of 3,115 shares each. One award vests in three equal annual installments, while the other can pay out from 0%–200% of units based on relative total shareholder return performance over a multi-year period ending in 2028.

What are the vesting terms of Greg Redinbo’s new Axcelis (ACLS) RSU awards?

One RSU grant vests one-third on each of May 15, 2027, May 15, 2028, and May 15, 2029. The performance-based grant earns shares based on relative total shareholder return from January 1, 2026 to December 31, 2028, vesting in 2029.

Why did Greg Redinbo forfeit Axcelis (ACLS) shares in this Form 4 filing?

The forfeitures relate to tax withholding on RSUs that vested on May 15, 2026. In each case, shares from prior service-vesting RSU grants made in 2023, 2024, and 2025 were reduced by 839 shares in total, valued at $155.18 per share, to satisfy tax obligations.

How many Axcelis (ACLS) shares does Greg Redinbo hold after these transactions?

After the reported grants and tax-withholding forfeitures, Redinbo holds more than 32,000 shares of Axcelis common stock. Footnotes indicate that tens of thousands of these shares are issuable upon vesting of restricted stock units and remain subject to forfeiture conditions.

What performance conditions apply to Greg Redinbo’s Axcelis (ACLS) performance RSUs?

The performance RSUs can earn from 0%–200% of the granted units. Payout depends on achieving performance goals based on relative total shareholder return over January 1, 2026 to December 31, 2028, with earned shares vesting upon performance measurement in 2029.