Axcelis Technologies Inc (ACLS) Insider Ownership

Historic Insider Ownership Trends

Axcelis Technologies's top three insider shareholders as of April 25, 2026 are Russell Low (President And Ceo, 132.28K shares), Russell Low (President And Ceo, 132.28K shares), James Gordon Coogan (Evp And Cfo, 37.14K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Russell Low President And Ceo 132,282 0 02 Apr, 2026
Russell Low President And Ceo 132,282 0 02 Apr, 2026
James Gordon Coogan Evp And Cfo 37,144 0 03 Mar, 2026
Richard J Faubert - 33,625 0 12 Aug, 2022
Greg Redinbo Evp Marketing And Applications 31,938 0 03 Mar, 2026
Greg Redinbo Evp Marketing And Applications 31,938 0 03 Mar, 2026
William J Bintz Evp, Product Development 31,173 0 23 Nov, 2022
William J Bintz Evp, Product Development 31,173 0 23 Nov, 2022
Lynnette C Fallon Executive Vp, Hr/Legal 27,323 0 07 Jan, 2025
Lynnette C Fallon Executive Vp, Hr/Legal 27,323 0 07 Jan, 2025
Eileen Evans Evp, General Counsel And Sec'Y 24,406 0 18 Dec, 2025
Christopher Tatnall Evp Global Customer Operations 23,044 0 21 Apr, 2026
Kevin J Brewer Evp Chief Financial Officer 19,597 0 02 Jan, 2024
Gerald M Blumenstock Evp, Research, Dev. Eng. 17,540 0 03 Mar, 2026
Gerald M Blumenstock Evp, Research, Dev. Eng. 17,540 0 03 Mar, 2026
Dennis Thomas St - 17,155 0 15 May, 2025
Dennis Thomas St - 17,155 0 15 May, 2025
Douglas A. Lawson Evp, Corporate Mktg Strategy 15,808 0 24 Jun, 2024
Douglas A. Lawson Evp, Corporate Mktg Strategy 15,808 0 24 Jun, 2024
Robert John Mahoney Evp Global Operations 14,633 0 03 Mar, 2026
Robert John Mahoney Evp Global Operations 14,633 0 03 Mar, 2026
Jeanne Quirk - 11,749 0 15 May, 2025
Jeanne Quirk - 11,749 0 15 May, 2025
Tzu Yin Chiu - 10,403 0 15 May, 2025
Tzu Yin Chiu - 10,403 0 15 May, 2025
Dipti Vachani - 9,063 0 16 May, 2024
Dipti Vachani - 9,063 0 16 May, 2024
Necip Sayiner - 7,258 0 15 May, 2025
Jorge Titinger - 6,477 0 23 Feb, 2026
Jorge Titinger - 6,477 0 23 Feb, 2026
Joseph P Keithley - 3,157 0 14 Dec, 2023

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
20 Apr, 2026 Christopher Tatnall Common Stock D 907 $131.02 23,044 D F
01 Apr, 2026 Russell Low Common Stock D 1,244 $94.06 132,282 D S
01 Apr, 2026 Russell Low Common Stock D 1,244 $94.06 132,282 D S
24 Mar, 2026 Russell Low Common Stock D 1,244 $90.00 133,526 D S
24 Mar, 2026 Russell Low Common Stock D 1,244 $90.00 133,526 D S
02 Mar, 2026 Robert John Mahoney Common Stock D 573 $86.58 14,633 D F
02 Mar, 2026 James Gordon Coogan Common Stock D 1,800 $86.58 37,144 D F
02 Mar, 2026 Russell Low Common Stock D 5,227 $86.58 130,928 D F
02 Mar, 2026 Greg Redinbo Common Stock D 723 $86.58 31,938 D F
02 Mar, 2026 Robert John Mahoney Common Stock D 573 $86.58 14,633 D F
02 Mar, 2026 Greg Redinbo Common Stock D 723 $86.58 31,938 D F
02 Mar, 2026 Russell Low Common Stock D 5,227 $86.58 130,928 D F
02 Mar, 2026 Gerald M Blumenstock Common Stock D 1,121 $86.58 17,540 D F
02 Mar, 2026 Christopher Tatnall Common Stock D 1,121 $86.58 23,183 D F
02 Mar, 2026 Gerald M Blumenstock Common Stock D 1,121 $86.58 17,540 D F
20 Feb, 2026 Jorge Titinger Common Stock D 1,000 $80.00 6,477 D S
20 Feb, 2026 Jorge Titinger Common Stock D 1,000 $80.00 6,477 D S
15 Jan, 2026 Robert John Mahoney Common Stock A 1,734 $0.00 15,206 D A
15 Jan, 2026 Robert John Mahoney Common Stock A 1,734 $0.00 15,206 D A
17 Dec, 2025 Jorge Titinger Common Stock D 2,000 $86.05 7,477 D S