ACLS · Insider Trading
Axcelis Technologies Inc
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.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-16 | Greg Redinbo | EVP and Chief Strategy Officer | F | −208 | −$21.85K |
| 2026-09-16 | Christopher Tatnall | EVP Global Customer Operations | F | −136 | −$14.29K |
| 2026-07-17 | David Ryzhik | SVP Interim CFO | F | −221 | −$32.05K |
| 2026-06-17 | David Ryzhik | SVP Interim CFO | F | −76 | −$13.44K |
| 2026-06-16 | Gerald M Blumenstock | EVP, Research, Dev. & Eng. | F | −506 | −$96.95K |
| 2026-06-04 | Necip Sayiner | Director | Sell | −1,586 | −$249.70K |
| 2026-06-03 | Robert John Mahoney | EVP Global Operations | Sell | −1,155 | −$179.30K |
| 2026-05-28 | Todd Sutton | VP Corporate Controller | Sell | −2,000 | −$319.98K |
| 2026-05-26 | Thomas St Dennis | Director | Sell | −900 | −$139.83K |
| 2026-05-22 | Eileen Evans | EVP, General Counsel and Sec'y | Sell | −926 | −$144.00K |
| 2026-05-22 | Gerald M Blumenstock | EVP, Research, Dev. & Eng. | Sell | −1,161 | −$177.28K |
| 2026-05-21 | Christopher Tatnall | EVP Global Customer Operations | Sell | −1,166 | −$174.61K |
| 2026-05-20 | Jeanne Quirk | Director | Sell | −1,789 | −$250.85K |
| 2026-05-20 | Todd Sutton | VP Corporate Controller | F | −184 | −$26.91K |
| 2026-05-20 | John T Kurtzweil | Director | Sell | −3,500 | −$485.77K |
| 2026-05-20 | Greg Redinbo | EVP MARKETING AND APPLICATIONS | F | −190 | −$27.79K |
| 2026-05-20 | Gregory B Graves | Director | Sell | −3,225 | −$456.70K |
| 2026-05-20 | Russell Low | PRESIDENT AND CEO | F | −711 | −$103.98K |
| 2026-05-20 | Robert John Mahoney | EVP Global Operations | F | −312 | −$45.63K |
| 2026-05-19 | Eileen Evans | EVP, General Counsel and Sec'y | MIXED | +6,919 | −$134.54K |
| 2026-05-19 | David Ryzhik | SVP Interim CFO | MIXED | +2,889 | −$35.07K |
| 2026-05-19 | Gerald M Blumenstock | EVP, Research, Dev. & Eng. | MIXED | +4,361 | −$168.99K |
| 2026-05-19 | Todd Sutton | VP Corporate Controller | MIXED | +727 | −$68.43K |
| 2026-05-19 | Christopher Tatnall | EVP Global Customer Operations | MIXED | +5,749 | −$195.37K |
| 2026-05-19 | Russell Low | PRESIDENT AND CEO | MIXED | +32,041 | −$1.07M |
| 2026-05-19 | Robert John Mahoney | EVP Global Operations | MIXED | +3,118 | −$120.42K |
| 2026-05-19 | Greg Redinbo | EVP MARKETING AND APPLICATIONS | MIXED | +5,391 | −$130.20K |
| 2026-05-18 | Necip Sayiner | Director | A | +1,440 | — |
| 2026-05-18 | John T Kurtzweil | Director | A | +1,440 | — |
| 2026-05-18 | Jorge Titinger | Director | A | +1,440 | — |
| 2026-05-18 | Jeanne Quirk | Director | A | +1,440 | — |
| 2026-05-18 | Gregory B Graves | Director | A | +1,440 | — |
| 2026-05-18 | Thomas St Dennis | Director | A | +1,440 | — |
| 2026-05-18 | Tzu Yin Chiu | Director | A | +1,440 | — |
| 2026-05-15 | Gerald M Blumenstock | EVP, Research, Dev. & Eng. | Sell | −1,015 | −$164.75K |
| 2026-05-15 | Todd Sutton | VP Corporate Controller | Sell | −2,574 | −$421.86K |
| 2026-05-14 | Greg Redinbo | EVP MARKETING AND APPLICATIONS | Sell | −2,883 | −$463.73K |
| 2026-05-14 | Jorge Titinger | Director | Sell | −2,000 | −$328.28K |
| 2026-05-13 | Robert John Mahoney | EVP Global Operations | Sell | −2,258 | −$363.54K |
| 2026-05-07 | Russell Low | PRESIDENT AND CEO | Sell | −7,468 | −$1.17M |
| 2026-05-04 | Russell Low | PRESIDENT AND CEO | Sell | −1,244 | −$172.74K |
| 2026-04-21 | Christopher Tatnall | EVP Global Customer Operations | F | −907 | −$118.84K |
| 2026-04-02 | Russell Low | PRESIDENT AND CEO | Sell | −1,244 | −$117.01K |
| 2026-03-26 | Russell Low | PRESIDENT AND CEO | Sell | −1,244 | −$111.96K |
| 2026-03-03 | Christopher Tatnall | EVP Global Customer Operations | F | −1,121 | −$97.06K |
| 2026-03-03 | James Gordon Coogan | EVP AND CFO | F | −1,800 | −$155.84K |
| 2026-03-03 | Greg Redinbo | EVP MARKETING AND APPLICATIONS | F | −723 | −$62.60K |
| 2026-03-03 | Russell Low | PRESIDENT AND CEO | F | −5,227 | −$452.55K |
| 2026-03-03 | Gerald M Blumenstock | EVP, Research, Dev. & Eng. | F | −1,121 | −$97.06K |
| 2026-03-03 | Robert John Mahoney | EVP Global Operations | F | −573 | −$49.61K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Russell Low | PRESIDENT AND CEO | 154,900 | $16.65M |
| James Gordon Coogan | EVP AND CFO | 37,144 | $3.99M |
| Greg Redinbo | EVP and Chief Strategy Officer | 34,816 | $3.74M |
| John T Kurtzweil | Director | 32,990 | $3.55M |
| Eileen Evans | EVP, General Counsel and Sec'y | 31,295 | $3.36M |
| Christopher Tatnall | EVP Global Customer Operations | 27,491 | $2.95M |
| Lynnette C Fallon | EXECUTIVE VP, HR/LEGAL | 27,323 | $2.94M |
| Gerald M Blumenstock | EVP, Research, Dev. & Eng. | 19,987 | $2.15M |
| Thomas St Dennis | Director | 17,695 | $1.90M |
| Robert John Mahoney | EVP Global Operations | 14,410 | $1.55M |
| Tzu Yin Chiu | Director | 11,843 | $1.27M |
| Jeanne Quirk | Director | 11,400 | $1.23M |
| David Ryzhik | SVP Interim CFO | 9,884 | $1.06M |
| Necip Sayiner | Director | 7,112 | $764.29K |
| Todd Sutton | VP Corporate Controller | 6,360 | $683.48K |
| Jorge Titinger | Director | 5,917 | $635.87K |
| Gregory B Graves | Director | 5,473 | $588.16K |
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.
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.