AXCELIS TECHNOLOGIES INC (ACLS) — insider trading
Information Technology · NASDAQ
AXCELIS TECHNOLOGIES INC (ACLS) has 72 reported SEC Form 4 insider transactions in our data, including 18 open-market sales among the most recent 72 (latest 2026-09-15).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-15 | Tatnall Christopher | Officer (EVP Global Customer Operations) | Shares withheld for taxes / exercise cost | 136 | $105.04 | $14.3K | Form 4 |
| 2026-09-15 | Redinbo Greg | Officer (EVP and Chief Strategy Officer) | Shares withheld for taxes / exercise cost | 208 | $105.04 | $21.8K | Form 4 |
| 2026-07-15 | Ryzhik David | Officer (SVP Interim CFO) | Shares withheld for taxes / exercise cost | 94 | $145.01 | $13.6K | Form 4 |
| 2026-07-15 | Ryzhik David | Officer (SVP Interim CFO) | Shares withheld for taxes / exercise cost | 127 | $145.01 | $18.4K | Form 4 |
| 2026-06-16 | Ryzhik David | Officer (SVP Interim CFO) | Shares withheld for taxes / exercise cost | 76 | $176.85 | $13.4K | Form 4 |
| 2026-06-15 | Blumenstock Gerald M | Officer (EVP, Research, Dev. & Eng.) | Shares withheld for taxes / exercise cost | 506 | $191.60 | $96.9K | Form 4 |
| 2026-06-03 | Sayiner Necip | Director | Open-market sale | 1,586 | $157.44 | $249.7K | Form 4 |
| 2026-06-02 | Mahoney Robert John | Officer (EVP Global Operations) | Open-market sale | 1,155 | $155.24 | $179.3K | Form 4 |
| 2026-05-27 | Sutton Todd | Officer (VP Corporate Controller) | Open-market sale | 2,000 | $159.99 | $320.0K | Form 4 |
| 2026-05-22 | St Dennis Thomas | Director | Open-market sale | 900 | $155.37 | $139.8K | Form 4 |
| 2026-05-22 | Evans Eileen | Officer (EVP, General Counsel and Sec'y) | Open-market sale | 926 | $155.51 | $144.0K | Form 4 |
| 2026-05-21 | Blumenstock Gerald M | Officer (EVP, Research, Dev. & Eng.) | Open-market sale | 1,161 | $152.70 | $177.3K | Form 4 |
| 2026-05-20 | Tatnall Christopher | Officer (EVP Global Customer Operations) | Open-market sale | 1,166 | $149.75 | $174.6K | Form 4 |
| 2026-05-19 | Quirk Jeanne | Director | Open-market sale | 1,789 | $140.22 | $250.9K | Form 4 |
| 2026-05-19 | KURTZWEIL JOHN T | Director | Open-market sale | 3,500 | $138.79 | $485.8K | Form 4 |
| 2026-05-19 | GRAVES GREGORY B | Director | Open-market sale | 600 | $142.51 | $85.5K | Form 4 |
| 2026-05-19 | GRAVES GREGORY B | Director | Open-market sale | 2,625 | $141.41 | $371.2K | Form 4 |
| 2026-05-18 | Low Russell | Director, Officer (PRESIDENT AND CEO) | Shares withheld for taxes / exercise cost | 711 | $146.24 | $104.0K | Form 4 |
| 2026-05-18 | Redinbo Greg | Officer (EVP MARKETING AND APPLICATIONS) | Shares withheld for taxes / exercise cost | 79 | $146.24 | $11.6K | Form 4 |
| 2026-05-18 | Redinbo Greg | Officer (EVP MARKETING AND APPLICATIONS) | Shares withheld for taxes / exercise cost | 111 | $146.24 | $16.2K | Form 4 |
| 2026-05-18 | Mahoney Robert John | Officer (EVP Global Operations) | Shares withheld for taxes / exercise cost | 130 | $146.24 | $19.0K | Form 4 |
| 2026-05-18 | Mahoney Robert John | Officer (EVP Global Operations) | Shares withheld for taxes / exercise cost | 182 | $146.24 | $26.6K | Form 4 |
| 2026-05-18 | Sutton Todd | Officer (VP Corporate Controller) | Shares withheld for taxes / exercise cost | 184 | $146.24 | $26.9K | Form 4 |
| 2026-05-15 | Low Russell | Director, Officer (PRESIDENT AND CEO) | Shares withheld for taxes / exercise cost | 1,453 | $155.18 | $225.5K | Form 4 |
| 2026-05-15 | Low Russell | Director, Officer (PRESIDENT AND CEO) | Shares withheld for taxes / exercise cost | 1,722 | $155.18 | $267.2K | Form 4 |
| 2026-05-15 | Low Russell | Director, Officer (PRESIDENT AND CEO) | Shares withheld for taxes / exercise cost | 3,716 | $155.18 | $576.6K | Form 4 |
| 2026-05-15 | Low Russell | Director, Officer (PRESIDENT AND CEO) | Grant / award / vesting | 19,466 | — | $0 | Form 4 |
| 2026-05-15 | Low Russell | Director, Officer (PRESIDENT AND CEO) | Grant / award / vesting | 19,466 | — | $0 | Form 4 |
| 2026-05-15 | Evans Eileen | Officer (EVP, General Counsel and Sec'y) | Shares withheld for taxes / exercise cost | 867 | $155.18 | $134.5K | Form 4 |
| 2026-05-15 | Evans Eileen | Officer (EVP, General Counsel and Sec'y) | Grant / award / vesting | 3,893 | — | $0 | Form 4 |
| 2026-05-15 | Evans Eileen | Officer (EVP, General Counsel and Sec'y) | Grant / award / vesting | 3,893 | — | $0 | Form 4 |
| 2026-05-15 | Redinbo Greg | Officer (EVP MARKETING AND APPLICATIONS) | Shares withheld for taxes / exercise cost | 177 | $155.18 | $27.5K | Form 4 |
| 2026-05-15 | Redinbo Greg | Officer (EVP MARKETING AND APPLICATIONS) | Shares withheld for taxes / exercise cost | 210 | $155.18 | $32.6K | Form 4 |
| 2026-05-15 | Redinbo Greg | Officer (EVP MARKETING AND APPLICATIONS) | Shares withheld for taxes / exercise cost | 452 | $155.18 | $70.1K | Form 4 |
| 2026-05-15 | Redinbo Greg | Officer (EVP MARKETING AND APPLICATIONS) | Grant / award / vesting | 3,115 | — | $0 | Form 4 |
| 2026-05-15 | Redinbo Greg | Officer (EVP MARKETING AND APPLICATIONS) | Grant / award / vesting | 3,115 | — | $0 | Form 4 |
| 2026-05-15 | Tatnall Christopher | Officer (EVP Global Customer Operations) | Shares withheld for taxes / exercise cost | 170 | $155.18 | $26.4K | Form 4 |
| 2026-05-15 | Tatnall Christopher | Officer (EVP Global Customer Operations) | Shares withheld for taxes / exercise cost | 345 | $155.18 | $53.5K | Form 4 |
| 2026-05-15 | Tatnall Christopher | Officer (EVP Global Customer Operations) | Shares withheld for taxes / exercise cost | 744 | $155.18 | $115.5K | Form 4 |
| 2026-05-15 | Tatnall Christopher | Officer (EVP Global Customer Operations) | Grant / award / vesting | 3,504 | — | $0 | Form 4 |
| 2026-05-15 | Tatnall Christopher | Officer (EVP Global Customer Operations) | Grant / award / vesting | 3,504 | — | $0 | Form 4 |
| 2026-05-15 | Blumenstock Gerald M | Officer (EVP, Research, Dev. & Eng.) | Shares withheld for taxes / exercise cost | 345 | $155.18 | $53.5K | Form 4 |
| 2026-05-15 | Blumenstock Gerald M | Officer (EVP, Research, Dev. & Eng.) | Shares withheld for taxes / exercise cost | 744 | $155.18 | $115.5K | Form 4 |
| 2026-05-15 | Blumenstock Gerald M | Officer (EVP, Research, Dev. & Eng.) | Grant / award / vesting | 2,725 | — | $0 | Form 4 |
| 2026-05-15 | Blumenstock Gerald M | Officer (EVP, Research, Dev. & Eng.) | Grant / award / vesting | 2,725 | — | $0 | Form 4 |
| 2026-05-15 | Mahoney Robert John | Officer (EVP Global Operations) | Shares withheld for taxes / exercise cost | 61 | $155.18 | $9.5K | Form 4 |
| 2026-05-15 | Mahoney Robert John | Officer (EVP Global Operations) | Shares withheld for taxes / exercise cost | 170 | $155.18 | $26.4K | Form 4 |
| 2026-05-15 | Mahoney Robert John | Officer (EVP Global Operations) | Shares withheld for taxes / exercise cost | 173 | $155.18 | $26.8K | Form 4 |
| 2026-05-15 | Mahoney Robert John | Officer (EVP Global Operations) | Shares withheld for taxes / exercise cost | 372 | $155.18 | $57.7K | Form 4 |
| 2026-05-15 | Mahoney Robert John | Officer (EVP Global Operations) | Grant / award / vesting | 1,947 | — | $0 | Form 4 |
| 2026-05-15 | Mahoney Robert John | Officer (EVP Global Operations) | Grant / award / vesting | 1,947 | — | $0 | Form 4 |
| 2026-05-15 | Ryzhik David | Officer (SVP Interim CFO) | Shares withheld for taxes / exercise cost | 226 | $155.18 | $35.1K | Form 4 |
| 2026-05-15 | Ryzhik David | Officer (SVP Interim CFO) | Grant / award / vesting | 3,115 | — | $0 | Form 4 |
| 2026-05-15 | Sutton Todd | Officer (VP Corporate Controller) | Shares withheld for taxes / exercise cost | 103 | $155.18 | $16.0K | Form 4 |
| 2026-05-15 | Sutton Todd | Officer (VP Corporate Controller) | Shares withheld for taxes / exercise cost | 112 | $155.18 | $17.4K | Form 4 |
| 2026-05-15 | Sutton Todd | Officer (VP Corporate Controller) | Shares withheld for taxes / exercise cost | 226 | $155.18 | $35.1K | Form 4 |
| 2026-05-15 | Sutton Todd | Officer (VP Corporate Controller) | Grant / award / vesting | 1,168 | — | $0 | Form 4 |
| 2026-05-15 | Chiu Tzu Yin | Director | Grant / award / vesting | 1,440 | — | $0 | Form 4 |
| 2026-05-15 | GRAVES GREGORY B | Director | Grant / award / vesting | 1,440 | — | $0 | Form 4 |
| 2026-05-15 | KURTZWEIL JOHN T | Director | Grant / award / vesting | 1,440 | — | $0 | Form 4 |
| 2026-05-15 | Quirk Jeanne | Director | Grant / award / vesting | 1,440 | — | $0 | Form 4 |
| 2026-05-15 | Sayiner Necip | Director | Grant / award / vesting | 1,440 | — | $0 | Form 4 |
| 2026-05-15 | St Dennis Thomas | Director | Grant / award / vesting | 1,440 | — | $0 | Form 4 |
| 2026-05-15 | Titinger Jorge | Director | Grant / award / vesting | 1,440 | — | $0 | Form 4 |
| 2026-05-14 | Blumenstock Gerald M | Officer (EVP, Research, Dev. & Eng.) | Open-market sale | 1,015 | $162.32 | $164.7K | Form 4 |
| 2026-05-14 | Sutton Todd | Officer (VP Corporate Controller) | Open-market sale | 2,574 | $163.89 | $421.9K | Form 4 |
| 2026-05-13 | Redinbo Greg | Officer (EVP MARKETING AND APPLICATIONS) | Open-market sale | 2,883 | $160.85 | $463.7K | Form 4 |
| 2026-05-13 | Titinger Jorge | Director | Open-market sale | 2,000 | $164.14 | $328.3K | Form 4 |
| 2026-05-12 | Mahoney Robert John | Officer (EVP Global Operations) | Open-market sale | 2,258 | $161.00 | $363.5K | Form 4 |
| 2026-05-06 | Low Russell | Director, Officer (PRESIDENT AND CEO) | Open-market sale | 7,468 | $156.75 | $1.17M | Form 4 |
| 2026-05-01 | Low Russell | Director, Officer (PRESIDENT AND CEO) | Open-market sale | 1,244 | $138.86 | $172.7K | Form 4 |
| 2026-04-20 | Tatnall Christopher | Officer (EVP Global Customer Operations) | Shares withheld for taxes / exercise cost | 907 | $131.02 | $118.8K | Form 4 |
Ask the chat about ACLS's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: AXCELIS TECHNOLOGIES INC (ACLS).
Last updated 2026-09-15 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.