SEC Form 4 · Updated Daily
ACLS
— AXCELIS TECHNOLOGIES, INC. OwnershipInsider 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.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Low Russell | Director · Officer | 154,900 | 2026-05-18 | F |
| Redinbo Greg | Officer | 35,024 | 2026-05-18 | F |
| KURTZWEIL JOHN T | Director | 32,990 | 2026-05-19 | S |
| Evans Eileen | Officer | 31,295 | 2026-05-22 | S |
| Tatnall Christopher | Officer | 27,627 | 2026-05-20 | S |
| Blumenstock Gerald M | Officer | 19,987 | 2026-06-15 | F |
| St Dennis Thomas | Director | 17,695 | 2026-05-22 | S |
| Mahoney Robert John | Officer | 14,410 | 2026-06-02 | S |
| Chiu Tzu Yin | Director | 11,843 | 2026-05-15 | A |
| Quirk Jeanne | Director | 11,400 | 2026-05-19 | S |
| Ryzhik David | Officer | 9,790 | 2026-07-15 | F |
| Sayiner Necip | Director | 7,112 | 2026-06-03 | S |
| Sutton Todd | Officer | 6,360 | 2026-05-27 | S |
| Titinger Jorge | Director | 5,917 | 2026-05-15 | A |
| GRAVES GREGORY B | Director | 5,473 | 2026-05-19 | S |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-07-15 | Ryzhik David | Tax withholding | 94 | $145.01 | 9,790 |
| 2026-07-15 | Ryzhik David | Tax withholding | 127 | $145.01 | 9,884 |
| 2026-06-16 | Ryzhik David | Tax withholding | 76 | $176.84 | 9,955 |
| 2026-06-15 | Blumenstock Gerald M | Tax withholding | 506 | $191.60 | 19,987 |
| 2026-06-03 | Sayiner Necip | Open-market sale | 1,586 | $157.44 | 7,112 |
| 2026-06-02 | Mahoney Robert John | Open-market sale | 1,155 | $155.24 | 14,410 |
| 2026-05-27 | Sutton Todd | Open-market sale | 2,000 | $159.99 | 6,360 |
| 2026-05-22 | Evans Eileen | Open-market sale | 926 | $155.51 | 31,295 |
| 2026-05-22 | St Dennis Thomas | Open-market sale | 900 | $155.37 | 17,695 |
| 2026-05-21 | Blumenstock Gerald M | Open-market sale | 1,161 | $152.70 | 20,493 |
| 2026-05-20 | Tatnall Christopher | Open-market sale | 1,166 | $149.75 | 27,627 |
| 2026-05-19 | Quirk Jeanne | Open-market sale | 1,789 | $140.22 | 11,400 |
| 2026-05-19 | KURTZWEIL JOHN T | Open-market sale | 3,500 | $138.79 | 32,990 |
| 2026-05-19 | GRAVES GREGORY B | Open-market sale | 600 | $142.51 | 5,473 |
| 2026-05-19 | GRAVES GREGORY B | Open-market sale | 2,625 | $141.41 | 6,073 |
| 2026-05-18 | Low Russell | Tax withholding | 711 | $146.24 | 154,900 |
| 2026-05-18 | Redinbo Greg | Tax withholding | 79 | $146.24 | 35,024 |
| 2026-05-18 | Redinbo Greg | Tax withholding | 111 | $146.24 | 35,103 |
| 2026-05-18 | Mahoney Robert John | Tax withholding | 130 | $146.24 | 15,565 |
| 2026-05-18 | Mahoney Robert John | Tax withholding | 182 | $146.24 | 15,695 |
| 2026-05-18 | Sutton Todd | Tax withholding | 184 | $146.24 | 8,360 |
| 2026-05-15 | Chiu Tzu Yin | Grant / award | 1,440 | $0.00 | 11,843 |
| 2026-05-15 | GRAVES GREGORY B | Grant / award | 1,440 | $0.00 | 8,698 |
| 2026-05-15 | KURTZWEIL JOHN T | Grant / award | 1,440 | $0.00 | 36,490 |
| 2026-05-15 | Quirk Jeanne | Grant / award | 1,440 | $0.00 | 13,189 |
| 2026-05-15 | Sayiner Necip | Grant / award | 1,440 | $0.00 | 8,698 |
| 2026-05-15 | St Dennis Thomas | Grant / award | 1,440 | $0.00 | 18,595 |
| 2026-05-15 | Titinger Jorge | Grant / award | 1,440 | $0.00 | 5,917 |
| 2026-05-15 | Low Russell | Tax withholding | 1,453 | $155.18 | 155,611 |
| 2026-05-15 | Low Russell | Tax withholding | 1,722 | $155.18 | 157,064 |
| 2026-05-15 | Low Russell | Tax withholding | 3,716 | $155.18 | 158,786 |
| 2026-05-15 | Low Russell | Grant / award | 19,466 | $0.00 | 162,502 |
| 2026-05-15 | Low Russell | Grant / award | 19,466 | $0.00 | 143,036 |
| 2026-05-15 | Evans Eileen | Tax withholding | 867 | $155.18 | 32,221 |
| 2026-05-15 | Evans Eileen | Grant / award | 3,893 | $0.00 | 33,088 |
| 2026-05-15 | Evans Eileen | Grant / award | 3,893 | $0.00 | 29,195 |
| 2026-05-15 | Redinbo Greg | Tax withholding | 177 | $155.18 | 35,214 |
| 2026-05-15 | Redinbo Greg | Tax withholding | 210 | $155.18 | 35,391 |
| 2026-05-15 | Redinbo Greg | Tax withholding | 452 | $155.18 | 35,601 |
| 2026-05-15 | Redinbo Greg | Grant / award | 3,115 | $0.00 | 36,053 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.