SEC Form 4 · Updated Daily

ACLS

AXCELIS TECHNOLOGIES, INC. Ownership

Insider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.

FinancialsOwnership

Current Reporting Owners

OwnerRoleShares OwnedAs OfLast Activity
Low RussellDirector · Officer154,9002026-05-18F
Redinbo GregOfficer35,0242026-05-18F
KURTZWEIL JOHN TDirector32,9902026-05-19S
Evans EileenOfficer31,2952026-05-22S
Tatnall ChristopherOfficer27,6272026-05-20S
Blumenstock Gerald MOfficer19,9872026-06-15F
St Dennis ThomasDirector17,6952026-05-22S
Mahoney Robert JohnOfficer14,4102026-06-02S
Chiu Tzu YinDirector11,8432026-05-15A
Quirk JeanneDirector11,4002026-05-19S
Ryzhik DavidOfficer9,7902026-07-15F
Sayiner NecipDirector7,1122026-06-03S
Sutton ToddOfficer6,3602026-05-27S
Titinger JorgeDirector5,9172026-05-15A
GRAVES GREGORY BDirector5,4732026-05-19S

Recent Filings

DateOwnerActivitySharesPriceOwned After
2026-07-15Ryzhik DavidTax withholding94$145.019,790
2026-07-15Ryzhik DavidTax withholding127$145.019,884
2026-06-16Ryzhik DavidTax withholding76$176.849,955
2026-06-15Blumenstock Gerald MTax withholding506$191.6019,987
2026-06-03Sayiner NecipOpen-market sale1,586$157.447,112
2026-06-02Mahoney Robert JohnOpen-market sale1,155$155.2414,410
2026-05-27Sutton ToddOpen-market sale2,000$159.996,360
2026-05-22Evans EileenOpen-market sale926$155.5131,295
2026-05-22St Dennis ThomasOpen-market sale900$155.3717,695
2026-05-21Blumenstock Gerald MOpen-market sale1,161$152.7020,493
2026-05-20Tatnall ChristopherOpen-market sale1,166$149.7527,627
2026-05-19Quirk JeanneOpen-market sale1,789$140.2211,400
2026-05-19KURTZWEIL JOHN TOpen-market sale3,500$138.7932,990
2026-05-19GRAVES GREGORY BOpen-market sale600$142.515,473
2026-05-19GRAVES GREGORY BOpen-market sale2,625$141.416,073
2026-05-18Low RussellTax withholding711$146.24154,900
2026-05-18Redinbo GregTax withholding79$146.2435,024
2026-05-18Redinbo GregTax withholding111$146.2435,103
2026-05-18Mahoney Robert JohnTax withholding130$146.2415,565
2026-05-18Mahoney Robert JohnTax withholding182$146.2415,695
2026-05-18Sutton ToddTax withholding184$146.248,360
2026-05-15Chiu Tzu YinGrant / award1,440$0.0011,843
2026-05-15GRAVES GREGORY BGrant / award1,440$0.008,698
2026-05-15KURTZWEIL JOHN TGrant / award1,440$0.0036,490
2026-05-15Quirk JeanneGrant / award1,440$0.0013,189
2026-05-15Sayiner NecipGrant / award1,440$0.008,698
2026-05-15St Dennis ThomasGrant / award1,440$0.0018,595
2026-05-15Titinger JorgeGrant / award1,440$0.005,917
2026-05-15Low RussellTax withholding1,453$155.18155,611
2026-05-15Low RussellTax withholding1,722$155.18157,064
2026-05-15Low RussellTax withholding3,716$155.18158,786
2026-05-15Low RussellGrant / award19,466$0.00162,502
2026-05-15Low RussellGrant / award19,466$0.00143,036
2026-05-15Evans EileenTax withholding867$155.1832,221
2026-05-15Evans EileenGrant / award3,893$0.0033,088
2026-05-15Evans EileenGrant / award3,893$0.0029,195
2026-05-15Redinbo GregTax withholding177$155.1835,214
2026-05-15Redinbo GregTax withholding210$155.1835,391
2026-05-15Redinbo GregTax withholding452$155.1835,601
2026-05-15Redinbo GregGrant / award3,115$0.0036,053

Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.