AXCELIS TECHNOLOGIES (ACLS) stock: insider trades, news & valuation
Heavy sellingShare price and insider trades
AXCELIS TECHNOLOGIES insider trading at a glance (Oct 9, 2026): in the past 12 months, 0 insiders bought $0 and 13 sold $6.4M of ACLS stock on the open market.
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ACLS insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | — | 0 | — | 0 |
| Q2 2026 | — | 0 | $5.8M | 19 |
| Q1 2026 | — | 0 | $192K | 2 |
| Q4 2025 | — | 0 | $444K | 2 |
Valuation, profit and volume
Summary
Over the past 12 months, 0 AXCELIS TECHNOLOGIES INC insiders reported open-market purchases totaling $0, while 13 insiders reported sales totaling $6.4M. 4 of 23 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
ACLS earnings: how the stock reacted
Each quarterly results release (SEC 8-K Item 2.02), the trend before it, insider trades in the 30 days before, and the 2-day market reaction. “E” marks releases on the chart above.
| Release | 15 days before | Insiders, 30 days before | Reaction (2 days) | Next 30 days |
|---|---|---|---|---|
| Aug 6, 2026 | -4.6% | None | +2.6%S&P +0.5% | -18.0% |
| May 7, 2026 | +28.4% | Sold $1.3M | -4.7%S&P +0.5% | -9.7% |
| Feb 17, 2026 | +2.5% | None | -13.3%S&P +0.7% | +3.0% |
| Nov 4, 2025 | -0.2% | None | +2.1%S&P -0.8% | +7.5% |
| Aug 5, 2025 | -0.1% | None | +6.8%S&P +0.3% | +6.5% |
| May 6, 2025 | +16.3% | None | +11.5%S&P -0.4% | +9.3% |
| Feb 10, 2025 | -10.0% | None | -7.2%S&P +0.8% | -1.9% |
| Nov 6, 2024 | -6.5% | None | +1.9%S&P +3.3% | -14.8% |
Most companies bar insiders from trading in the weeks before results, so pre-earnings purchases are rare and often made by directors or under pre-set plans. Past reactions don't predict future ones.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Jun 4SEC | Necip SayinerDirector | Sell | 1,5867,112 held (−18%) | $157.44 | $250K | -14.4% | — |
| Jun 3SEC | Robert John MahoneyEvp Global Operations | Sell | 1,15514,410 held (−7%) | $155.24 | $179K | -13.2% | — |
| May 28SEC | Todd SuttonVp Corporate Controller | Sell | 2,0006,360 held (−24%) | $159.99 | $320K | -15.8% | — |
| May 26SEC | Dennis Thomas StDirector | Sell | 90017,695 held (−5%) | $155.37 | $140K | -13.3% | — |
| May 22SEC | Gerald M BlumenstockEvp, Research, Dev. & Eng. | Sell | 1,16120,493 held (−5%) | $152.70 | $177K | -11.8% | — |
| May 22SEC | Eileen EvansGeneral Counsel | Sell | 92631,295 held (−3%) | $155.51 | $144K | -13.4% | — |
| May 21SEC | Christopher TatnallEvp Global Customer Operations | Sell | 1,16627,627 held (−4%) | $149.75 | $175K | -10.0% | — |
| May 20SEC | John T KurtzweilDirector | Sell | 3,50032,990 held (−10%) | $138.79 | $486K | -2.9% | — |
| May 20SEC | Gregory B GravesDirector | Sell | 2,6256,073 held (−30%) | $141.41 | $371K | -4.7% | — |
| May 20SEC | Jeanne QuirkDirector | Sell | 1,78911,400 held (−14%) | $140.22 | $251K | -3.9% | — |
| May 20SEC | Gregory B GravesDirector | Sell | 6005,473 held (−10%) | $142.51 | $86K | -5.5% | — |
| May 15SEC | Todd SuttonVp Corporate Controller | Sell | 2,5747,817 held (−25%) | $163.89 | $422K | -17.8% | — |
| May 15SEC | Gerald M BlumenstockEvp, Research, Dev. & Eng. | Sell | 1,01517,293 held (−6%) | $162.32 | $165K | -17.0% | — |
| May 14SEC | Greg RedinboEvp Marketing And Applications | Sell | 2,88329,823 held (−9%) | $160.85 | $464K | -16.3% | — |
| May 14SEC | Jorge TitingerDirector | Sell | 2,0004,477 held (−31%) | $164.14 | $328K | -17.9% | — |
| May 13SEC | Robert John MahoneyEvp Global Operations | Sell | 2,25812,759 held (−15%) | $161.00 | $364K | -16.3% | — |
| May 7SEC | Russell LowCEO, President | Sell Plan | 7,468123,570 held (−6%) | $156.75 | $1.2M | -14.1% | — |
| May 4SEC | Russell LowCEO, President | Sell Plan | 1,244131,038 held (−1%) | $138.86 | $173K | -3.0% | — |
| Apr 2SEC | Russell LowCEO, President | Sell Plan | 1,244132,282 held (−1%) | $94.06 | $117K | +43.2% | — |
| Mar 26SEC | Russell LowCEO, President | Sell Plan | 1,244133,526 held (−1%) | $90.00 | $112K | +49.7% | — |
| Feb 23SEC | Jorge TitingerDirector | Sell | 1,0006,477 held (−13%) | $80.00 | $80K | +68.4% | — |
| Dec 18SEC | Jorge TitingerDirector | Sell | 2,0007,477 held (−21%) | $86.05 | $172K | +56.5% | — |
| Dec 12SEC | Gerald M BlumenstockEvp, Research, Dev. & Eng. | Sell | 3,03418,661 held (−14%) | $89.46 | $271K | +50.6% | — |
Insiders at AXCELIS TECHNOLOGIES INC
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Russell LowCEO, President | — | $1.6M | May 7, 2026 | — |
| Todd SuttonVp Corporate Controller | — | $742K | May 28, 2026 | — |
| Gerald M BlumenstockEvp, Research, Dev. & Eng. | — | $613K | May 22, 2026 | — |
| Jorge TitingerDirector | — | $580K | May 14, 2026 | — |
| Robert John MahoneyEvp Global Operations | — | $543K | Jun 3, 2026 | — |
| John T KurtzweilDirector | — | $486K | May 20, 2026 | — |
| Greg RedinboEvp Marketing And Applications | — | $464K | May 14, 2026 | — |
| Gregory B GravesDirector | — | $457K | May 20, 2026 | — |
| Jeanne QuirkDirector | — | $251K | May 20, 2026 | — |
| Necip SayinerDirector | — | $250K | Jun 4, 2026 | — |
| Christopher TatnallEvp Global Customer Operations | — | $175K | May 21, 2026 | — |
| Eileen EvansGeneral Counsel | — | $144K | May 22, 2026 | — |
| Dennis Thomas StDirector | — | $140K | May 26, 2026 | — |
ACLS stock: common questions
Are AXCELIS TECHNOLOGIES INC insiders buying ACLS stock?
In the past 12 months, 0 insiders reported open-market purchases of ACLS worth $0.
Are AXCELIS TECHNOLOGIES INC insiders selling ACLS stock?
13 insiders reported sales worth $6.4M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is ACLS's 52-week range?
Over the past year ACLS has traded between $74.12 and $191.60. It last closed at $134.71 on Oct 9, 2026.