NASDAQ:ACLS

Axcelis Technologies Stock Insider Trading

Technology > Semiconductors

Buy ACLS

*Your capital is at risk

$130.38

+5.17 (+4.13%)

At Close: Jul 31, 2026

Axcelis Technologies Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -64.44. In total, the insiders bought 85.4K and sold 81.46K ACLS shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	-64.44
● Buy	85.4K shares
● Sell	81.46K shares
25% Buy Activity Negligible or No Correlation
Buy Signal Low Confidence May 15, 2026 Analysis Breakdown: Signal is highly questionable due to a strongly contradictory negative Insider Power Score of -64.44. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
May 15, 2026 Sell	Common Stock F-InKind	Mahoney Robert John EVP Global Operations	Officer	372 Value: $57.7K
May 15, 2026 Buy	Common Stock A-Award	Mahoney Robert John EVP Global Operations	Officer	1 947 Value: $302.1K
May 15, 2026 Sell	Common Stock F-InKind	Ryzhik David SVP Interim CFO	C-Suite Officer	226 Value: $35.1K
May 15, 2026 Buy	Common Stock A-Award	Ryzhik David SVP Interim CFO	C-Suite Officer	3 115 Value: $483.4K
May 15, 2026 Sell	Common Stock F-InKind	Sutton Todd Vp Corporate Controller	Officer	103 Value: $16.0K
May 15, 2026 Sell	Common Stock F-InKind	Sutton Todd Vp Corporate Controller	Officer	112 Value: $17.4K
May 15, 2026 Sell	Common Stock F-InKind	Sutton Todd Vp Corporate Controller	Officer	226 Value: $35.1K
May 15, 2026 Buy	Common Stock A-Award	Sutton Todd Vp Corporate Controller	Officer	1 168 Value: $181.3K
May 15, 2026 Sell	Common Stock F-InKind	Mahoney Robert John EVP Global Operations	Officer	173 Value: $26.8K
May 15, 2026 Sell	Common Stock F-InKind	Mahoney Robert John EVP Global Operations	Officer	170 Value: $26.4K
May 15, 2026 Sell	Common Stock F-InKind	Mahoney Robert John EVP Global Operations	Officer	61 Value: $9K
May 15, 2026 Buy	Common Stock A-Award	Mahoney Robert John EVP Global Operations	Officer	1 947 Value: $302.1K
May 15, 2026 Buy	Common Stock A-Award	Blumenstock Gerald M EVP, Research, Dev. & Eng.	Officer	2 725 Value: $422.9K
May 15, 2026 Sell	Common Stock F-InKind	Blumenstock Gerald M EVP, Research, Dev. & Eng.	Officer	744 Value: $115.5K
May 15, 2026 Sell	Common Stock F-InKind	Blumenstock Gerald M EVP, Research, Dev. & Eng.	Officer	345 Value: $53.5K
May 15, 2026 Buy	Common Stock A-Award	Blumenstock Gerald M EVP, Research, Dev. & Eng.	Officer	2 725 Value: $422.9K
May 15, 2026 Buy	Common Stock A-Award	Tatnall Christopher EVP Global Customer Operations	Officer	3 504 Value: $543.8K
May 15, 2026 Sell	Common Stock F-InKind	Tatnall Christopher EVP Global Customer Operations	Officer	744 Value: $115.5K
May 15, 2026 Sell	Common Stock F-InKind	Tatnall Christopher EVP Global Customer Operations	Officer	345 Value: $53.5K
May 15, 2026 Sell	Common Stock F-InKind	Tatnall Christopher EVP Global Customer Operations	Officer	170 Value: $26.4K
May 15, 2026 Buy	Common Stock A-Award	Tatnall Christopher EVP Global Customer Operations	Officer	3 504 Value: $543.8K
May 15, 2026 Buy	Common Stock A-Award	Redinbo Greg EVP Marketing And Applications	Officer	3 115 Value: $483.4K
May 15, 2026 Sell	Common Stock F-InKind	Redinbo Greg EVP Marketing And Applications	Officer	452 Value: $70.1K
May 15, 2026 Sell	Common Stock F-InKind	Redinbo Greg EVP Marketing And Applications	Officer	210 Value: $32.6K
May 15, 2026 Sell	Common Stock F-InKind	Redinbo Greg EVP Marketing And Applications	Officer	177 Value: $27.5K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT AXCELIS TECHNOLOGIES

Axcelis Technologies, Inc. designs, manufactures, and services ion implantation and other processing equipment used in the fabrication of semiconductor chips in the United States, Europe, and Asia. The company offers high energy, high current, and medium current implanters for various application requirements. It also provides aftermarket lifecycle products and services, including used tools, spare parts, equipment upgrades, maintenance services,...

Read Full Profile Here