ACLS (Axcelis Technologies Inc)
Insider Trading Activity
Every open-market purchase and sale reported by ACLS officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-17 | David Ryzhik | SVP Interim CFO | F | — | — |
| 2026-06-17 | David Ryzhik | SVP Interim CFO | F | — | — |
| 2026-06-16 | Gerald M Blumenstock | EVP, Research, Dev. & Eng. | F | — | — |
| 2026-06-04 | Necip Sayiner | Director | Sell | — | — |
| 2026-06-03 | Robert John Mahoney | EVP Global Operations | Sell | — | — |
| 2026-05-28 | Todd Sutton | VP Corporate Controller | Sell | — | — |
| 2026-05-26 | Thomas St Dennis | Director | Sell | — | — |
| 2026-05-22 | Eileen Evans | EVP, General Counsel and Sec'y | Sell | — | — |
| 2026-05-22 | Gerald M Blumenstock | EVP, Research, Dev. & Eng. | Sell | — | — |
| 2026-05-21 | Christopher Tatnall | EVP Global Customer Operations | Sell | — | — |
| 2026-05-20 | Jeanne Quirk | Director | Sell | — | — |
| 2026-05-20 | Todd Sutton | VP Corporate Controller | F | — | — |
| 2026-05-20 | JOHN T KURTZWEIL | Director | Sell | — | — |
| 2026-05-20 | Greg Redinbo | EVP MARKETING AND APPLICATIONS | F | — | — |
| 2026-05-20 | GREGORY B GRAVES | Director | Sell | — | — |
| 2026-05-20 | Russell Low | PRESIDENT AND CEO | F | — | — |
| 2026-05-20 | Robert John Mahoney | EVP Global Operations | F | — | — |
| 2026-05-19 | Eileen Evans | EVP, General Counsel and Sec'y | MIXED | — | — |
| 2026-05-19 | David Ryzhik | SVP Interim CFO | MIXED | — | — |
| 2026-05-19 | Gerald M Blumenstock | EVP, Research, Dev. & Eng. | MIXED | — | — |
| 2026-05-19 | Todd Sutton | VP Corporate Controller | MIXED | — | — |
| 2026-05-19 | Christopher Tatnall | EVP Global Customer Operations | MIXED | — | — |
| 2026-05-19 | Russell Low | PRESIDENT AND CEO | MIXED | — | — |
| 2026-05-19 | Robert John Mahoney | EVP Global Operations | MIXED | — | — |
| 2026-05-19 | Greg Redinbo | EVP MARKETING AND APPLICATIONS | MIXED | — | — |
| 2026-05-18 | Necip Sayiner | Director | A | — | — |
| 2026-05-18 | JOHN T KURTZWEIL | Director | A | — | — |
| 2026-05-18 | Jorge Titinger | Director | A | — | — |
| 2026-05-18 | Jeanne Quirk | Director | A | — | — |
| 2026-05-18 | GREGORY B GRAVES | Director | A | — | — |
| 2026-05-18 | Thomas St Dennis | Director | A | — | — |
| 2026-05-18 | Tzu Yin Chiu | Director | A | — | — |
| 2026-05-15 | Gerald M Blumenstock | EVP, Research, Dev. & Eng. | Sell | — | — |
| 2026-05-15 | Todd Sutton | VP Corporate Controller | Sell | — | — |
| 2026-05-14 | Greg Redinbo | EVP MARKETING AND APPLICATIONS | Sell | — | — |
| 2026-05-14 | Jorge Titinger | Director | Sell | — | — |
| 2026-05-13 | Robert John Mahoney | EVP Global Operations | Sell | — | — |
| 2026-05-07 | Russell Low | PRESIDENT AND CEO | Sell | — | — |
| 2026-05-04 | Russell Low | PRESIDENT AND CEO | Sell | — | — |
| 2026-04-21 | Christopher Tatnall | EVP Global Customer Operations | F | — | — |
| 2026-04-02 | Russell Low | PRESIDENT AND CEO | Sell | — | — |
| 2026-03-26 | Russell Low | PRESIDENT AND CEO | Sell | — | — |
| 2026-03-03 | Christopher Tatnall | EVP Global Customer Operations | F | — | — |
| 2026-03-03 | JAMES GORDON COOGAN | EVP AND CFO | F | — | — |
| 2026-03-03 | Greg Redinbo | EVP MARKETING AND APPLICATIONS | F | — | — |
| 2026-03-03 | Russell Low | PRESIDENT AND CEO | F | — | — |
| 2026-03-03 | Gerald M Blumenstock | EVP, Research, Dev. & Eng. | F | — | — |
| 2026-03-03 | Robert John Mahoney | EVP Global Operations | F | — | — |
| 2026-02-23 | Jorge Titinger | Director | Sell | — | — |
| 2026-01-16 | Robert John Mahoney | EVP Global Operations | A | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | EXECUTIVE CHAIRPERSON | 236,976 | — |
| — | Director | 163,621 | — |
| — | PRESIDENT AND CEO | 154,900 | — |
| — | Director | 58,936 | — |
| — | CFO and EVP | 44,509 | — |
| — | EVP, Customer Operations | 37,246 | — |
| — | EVP AND CFO | 37,144 | — |
| — | EVP MARKETING AND APPLICATIONS | 35,024 | — |
| — | Director | 33,625 | — |
| — | Senior VP and CIO | 33,342 | — |
| — | Director | 32,990 | — |
| — | Sr VP Product Development | 31,878 | — |
| — | Executive VP and CFO | 31,658 | — |
| — | Director | 31,360 | — |
| — | EVP, General Counsel and Sec'y | 31,295 | — |
| — | EVP, Product Development | 31,173 | — |
| — | Director | 28,546 | — |
| — | EVP Global Customer Operations | 27,627 | — |
| — | EXECUTIVE VP, HR/LEGAL | 27,323 | — |
| — | Director | 23,046 | — |
| — | EVP, Research, Dev. & Eng. | 19,987 | — |
| — | EVP & Chief Financial Officer | 19,597 | — |
| — | Director | 17,695 | — |
| — | Senior VP Strategic Marketing | 16,552 | — |
| — | Senior Vice President, Finance | 15,934 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the ACLS quote page; the site-wide leaderboard is on the insider transactions hub.