AXCELIS TECHNOLOGIES INC (ACLS) is a publicly traded company in the Unknown sector. Across all available filings, 35 corporate insiders have executed 1007 transactions totaling $113.8M, demonstrating a bearish sentiment with -$111.1M in net insider flow. The most recent transaction on Jan 15, 2026 involved a transaction of 1,734 shares valued at $0.
No significant insider buying has been recorded for ACLS in the recent period.
No significant insider selling has been recorded for ACLS in the recent period.
Based on recent SEC filings, insider sentiment for ACLS is bearish with an Insider Alignment Score of 1/100 and a net flow of -$111.1M. Insiders are reducing their positions, though this can be driven by factors unrelated to company outlook.
Insider trading at AXCELIS TECHNOLOGIES INC (ACLS) refers to stock transactions made by corporate insiders—executives, directors, and beneficial owners holding more than 10% of the company's shares. These individuals have access to material non-public information and are required by law to report their trades to the SEC within two business days. Currently, 35 insiders are actively trading ACLS stock, having executed 1007 transactions in the past 90 days. The most active insider is Mary G. Puma (Executive), who has made 117 transactions totaling $44.8M.
Get notified when executives and directors at ACLS file new Form 4 transactions
Date | Insider | Title | Type | Shares | Price | Value | Flags |
|---|---|---|---|---|---|---|---|
| Jan 15, 2026 | John Mahoney Robert | EVP Global Operations | Award | 1,734 | $N/A | $0 | |
| Dec 17, 2025 | Titinger Jorge | Executive | Sale | 2,000 | $86.05 | $172.1K | |
| Dec 16, 2025 | Evans Eileen | Executive | Payment | 1,378 | $86.32 | $118.9K | |
| Dec 11, 2025 | M. Blumenstock Gerald | Executive | Sale | 3,034 | $89.46 | $271.4K | |
| Oct 16, 2025 | Gordon Coogan James | Executive | Payment | 713 | $83.62 | $59.6K | |
| Sep 15, 2025 | Redinbo Greg | Executive | Payment | 208 | $87.30 | $18.2K | |
| Sep 15, 2025 | Tatnall Christopher | Executive | Payment | 137 | $87.30 | $12.0K | |
| Sep 16, 2024 | Redinbo Greg | Executive | Payment | 236 | $98.86 | $23.3K | |
| Sep 16, 2024 | Tatnall Christopher | Executive | Payment | 83 | $98.86 | $8.2K | |
| Aug 6, 2024 | Titinger Jorge | Executive | Sale | 6,086 | $109.98 | $669.3K | Large |
| Jun 20, 2024 | A. Lawson Douglas | Executive | Payment | 1,396 | $136.02 | $189.9K | |
| Jun 17, 2024 | Redinbo Greg | Executive | Payment | 777 | $138.02 | $107.2K | |
| Jun 17, 2024 | M. Blumenstock Gerald | Executive | Payment | 308 | $138.02 | $42.5K | |
| Jun 5, 2024 | Low Russell | Executive | Payment | 387 | $111.29 | $43.1K | |
| Jun 5, 2024 | C. Fallon Lynnette | Executive | Payment | 272 | $111.29 | $30.3K |
| TYPE | COUNT | VALUE | % |
|---|---|---|---|
Sale(S) | 301 | $112.5M | 78.4% |
Payment(F) | 283 | $16.0M | 11.1% |
Exercise(M) | 100 | $13.7M | 9.5% |
Purchase(P) | 73 | $1.3M | 0.9% |
Award(A) | 232 | $0 | 0.0% |
Gift(G) | 5 | $0 | 0.0% |
Will Acquisition(W) | 1 | $0 | 0.0% |
Disposition(D) | 12 | $0 | 0.0% |
Insider selling pressure at AXCELIS TECHNOLOGIES INC has increased, with 35 insiders executing 1007 transactions across all time. Total sales of $112.5M significantly outpace purchases of $1.3M, resulting in a net outflow of $111.1M. This selling activity appears largely discretionary, which may warrant closer attention from investors.