🕵️ Axcelis Technologies Inc ($ACLS)
SEC insider & ownership activity, last 12 months · CIK 1113232 · every row links its SEC filing
Over the last 12 months insiders sold $6.4M with no open-market buying against it. Russell Low sold $1.6M through a 10b5-1 trading plan in 4 lots (Mar–May). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 13 sellers, $6.4M (23 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Russell Low | 0 | – | 4 | $1.6M | May 6, 2026 |
| Todd Sutton | 0 | – | 2 | $742K | May 27, 2026 |
| Gerald M. Blumenstock | 0 | – | 3 | $613K | May 21, 2026 |
| Jorge Titinger | 0 | – | 3 | $580K | May 13, 2026 |
| Mahoney Robert John | 0 | – | 2 | $543K | Jun 2, 2026 |
| John Thomas Kurtzweil | 0 | – | 1 | $486K | May 19, 2026 |
| Gregory F Redinbo | 0 | – | 1 | $464K | May 13, 2026 |
| Gregory B. Graves | 0 | – | 2 | $457K | May 19, 2026 |
| Jeanne Quirk | 0 | – | 1 | $251K | May 19, 2026 |
| Sayiner Necip | 0 | – | 1 | $250K | Jun 3, 2026 |
| Christopher Tatnall | 0 | – | 1 | $175K | May 20, 2026 |
| Eileen Evans | 0 | – | 1 | $144K | May 22, 2026 |
| Thomas M. St. Dennis | 0 | – | 1 | $140K | May 22, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Blackrock, Inc. | 15.3% | 13G | Apr 29, 2025 | filing ↗ | |
| FMR LLC | 11.3% | 13G | May 7, 2026 | filing ↗ | |
| Abigail P. Johnson | 11.3% | 13G | May 7, 2026 | filing ↗ | |
| Vanguard Portfolio Management | 8.1% | 13G | Apr 28, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.3% | 13G | Apr 29, 2026 | filing ↗ | |
| Reinhart Partners, LLC. | exited | 13G | Jul 14, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Necip Sayiner | $250K | Jun 3, 2026 | filing ↗ |
| Robert Mahoney | $179K | Jun 2, 2026 | filing ↗ |
| Todd Sutton | $320K | May 27, 2026 | filing ↗ |
| Thomas M. St. Dennis | $140K | May 22, 2026 | filing ↗ |
| Eileen Evans | $144K | May 22, 2026 | filing ↗ |
| Gerald Blumenstock | $177K | May 21, 2026 | filing ↗ |
| Christopher Tatnall | $175K | May 20, 2026 | filing ↗ |
| John Thomas Kurtzweil | $486K | May 19, 2026 | filing ↗ |
| Jeanne Quirk | $251K | May 19, 2026 | filing ↗ |
| Gregory Graves | $457K | May 19, 2026 | filing ↗ |
| Todd Sutton | $422K | May 14, 2026 | filing ↗ |
| Gerald Blumenstock | $165K | May 14, 2026 | filing ↗ |
| Jorge Titinger | $328K | May 13, 2026 | filing ↗ |
| Gregory F Redinbo | $464K | May 13, 2026 | filing ↗ |
| Robert Mahoney | $364K | May 12, 2026 | filing ↗ |
| Russell Low | $1.0M | May 6, 2026 | filing ↗ |
| Russell Low | $173K | May 1, 2026 | filing ↗ |
| Russell Low | $116K | Apr 1, 2026 | filing ↗ |
| Russell Low | $107K | Mar 24, 2026 | filing ↗ |
| Jorge Titinger | $80K | Feb 20, 2026 | filing ↗ |
| Jorge Titinger | $172K | Dec 17, 2025 | filing ↗ |
| Gerald Blumenstock | $271K | Dec 11, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | May 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 7, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 5, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 10, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 10, 2026 | filing ↗ |
| Earnings (2.02) | Feb 17, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 17, 2026 | filing ↗ |
| Shareholder vote (5.07) | Feb 6, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 6, 2026 | filing ↗ |
| Other events (8.01) | Jan 28, 2026 | filing ↗ |
| Other events (8.01) | Jan 22, 2026 | filing ↗ |
| Earnings (2.02) | Nov 4, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 4, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Oct 1, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 1, 2025 | filing ↗ |
| Material agreement (1.01) | Oct 1, 2025 | filing ↗ |
| Other events (8.01) | Oct 1, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 1, 2025 | filing ↗ |
| Earnings (2.02) | Aug 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 5, 2025 | filing ↗ |