Axcelis Technologies, Inc. (ACLS) Insider Trading

Last 12 months

Insiders sold $6.42M and bought nothing on the open market.

25% of the selling was scheduled in advance under 10b5-1 plans. Director Gregory B Graves sold $457k on May 19, 37% of their stake, outside a plan. The last open-market buy by an executive or director was in Mar 2024.

Net open-market

−$6.42M

0 buys · 22 sales

Under a 10b5-1 plan

25%

of the value sold

Insiders who bought / sold

0 / 13

executives and directors

Last open-market buy

Mar 2024

Mar 11, 2024

Get an email when ACLS's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Jun 3	Necip Sayiner Director	SoldNo plan	1,586	$157.44	$250k	18%	Form 4
Jun 2	Robert John Mahoney EVP Global Operations	SoldNo plan	1,155	$155.24	$179k	7.4%	Form 4
May 27	Todd Sutton VP Corporate Controller	SoldNo plan	2,000	$159.99	$320k	24%	Form 4
May 22	Thomas St Dennis Director	SoldNo plan	900	$155.37	$140k	4.8%	Form 4
May 22	Eileen Evans EVP, General Counsel and Sec'y	SoldNo plan	926	$155.51	$144k	2.9%	Form 4
May 21	Gerald M Blumenstock EVP, Research, Dev. & Eng.	SoldNo plan	1,161	$152.70	$177k	5.4%	Form 4
May 20	Christopher Tatnall EVP Global Customer Operations	SoldNo plan	1,166	$149.75	$175k	4.0%	Form 4
May 19	Jeanne Quirk Director	SoldNo plan	1,789	$140.22	$251k	14%	Form 4
May 19	Gregory B Graves Director	SoldNo plan 2 parts	3,225	$141.61 average	$457k	37%	Form 4
May 19	John T Kurtzweil Director	SoldNo plan	3,500	$138.79	$486k	9.6%	Form 4
May 14	Todd Sutton VP Corporate Controller	SoldNo plan	2,574	$163.89	$422k	25%	Form 4
May 14	Gerald M Blumenstock EVP, Research, Dev. & Eng.	SoldNo plan	1,015	$162.32	$165k	5.5%	Form 4
May 13	Greg Redinbo EVP MARKETING AND APPLICATIONS	SoldNo plan	2,883	$160.85	$464k	8.8%	Form 4
May 13	Jorge Titinger Director	SoldNo plan	2,000	$164.14	$328k	31%	Form 4
May 12	Robert John Mahoney EVP Global Operations	SoldNo plan	2,258	$161.00	$364k	15%	Form 4
May 6	Russell Low PRESIDENT AND CEO	Sold10b5-1 plan	7,468	$156.75	$1.17M	5.7%	Form 4
May 1	Russell Low PRESIDENT AND CEO	Sold10b5-1 plan	1,244	$138.86	$173k	0.9%	Form 4
Apr 1	Russell Low PRESIDENT AND CEO	Sold10b5-1 plan	1,244	$94.06	$117k	0.9%	Form 4
Mar 24	Russell Low PRESIDENT AND CEO	Sold10b5-1 plan	1,244	$90.00	$112k	0.9%	Form 4
Feb 20	Jorge Titinger Director	SoldNo plan	1,000	$80.00	$80k	13%	Form 4
Dec 17, 2025	Jorge Titinger Director	SoldNo plan	2,000	$86.05	$172k	21%	Form 4
Dec 11, 2025	Gerald M Blumenstock EVP, Research, Dev. & Eng.	SoldNo plan	3,034	$89.46	$271k	14%	Form 4
May 20, 2025	John T Kurtzweil Director	SoldNo plan	1,682	$61.93	$104k	4.6%	Form 4

Jun 3No plan
Necip Sayiner
Director · sold 1,586 at $157.44
$250k
18% of stake
Jun 2No plan
Robert John Mahoney
EVP Global Operations · sold 1,155 at $155.24
$179k
7.4% of stake
May 27No plan
Todd Sutton
VP Corporate Controller · sold 2,000 at $159.99
$320k
24% of stake
May 22No plan
Thomas St Dennis
Director · sold 900 at $155.37
$140k
4.8% of stake
May 22No plan
Eileen Evans
EVP, General Counsel and Sec'y · sold 926 at $155.51
$144k
2.9% of stake
May 21No plan
Gerald M Blumenstock
EVP, Research, Dev. & Eng. · sold 1,161 at $152.70
$177k
5.4% of stake
May 20No plan
Christopher Tatnall
EVP Global Customer Operations · sold 1,166 at $149.75
$175k
4.0% of stake
May 19No plan
Jeanne Quirk
Director · sold 1,789 at $140.22
$251k
14% of stake
May 19No plan
Gregory B Graves
Director · sold 3,225 at avg $141.61
$457k
37% of stake
May 19No plan
John T Kurtzweil
Director · sold 3,500 at $138.79
$486k
9.6% of stake
May 14No plan
Todd Sutton
VP Corporate Controller · sold 2,574 at $163.89
$422k
25% of stake
May 14No plan
Gerald M Blumenstock
EVP, Research, Dev. & Eng. · sold 1,015 at $162.32
$165k
5.5% of stake
May 13No plan
Greg Redinbo
EVP MARKETING AND APPLICATIONS · sold 2,883 at $160.85
$464k
8.8% of stake
May 13No plan
Jorge Titinger
Director · sold 2,000 at $164.14
$328k
31% of stake
May 12No plan
Robert John Mahoney
EVP Global Operations · sold 2,258 at $161.00
$364k
15% of stake
May 610b5-1 plan
Russell Low
PRESIDENT AND CEO · sold 7,468 at $156.75
$1.17M
5.7% of stake
May 110b5-1 plan
Russell Low
PRESIDENT AND CEO · sold 1,244 at $138.86
$173k
0.9% of stake
Apr 110b5-1 plan
Russell Low
PRESIDENT AND CEO · sold 1,244 at $94.06
$117k
0.9% of stake
Mar 2410b5-1 plan
Russell Low
PRESIDENT AND CEO · sold 1,244 at $90.00
$112k
0.9% of stake
Feb 20No plan
Jorge Titinger
Director · sold 1,000 at $80.00
$80k
13% of stake
Dec 17, 2025No plan
Jorge Titinger
Director · sold 2,000 at $86.05
$172k
21% of stake
Dec 11, 2025No plan
Gerald M Blumenstock
EVP, Research, Dev. & Eng. · sold 3,034 at $89.46
$271k
14% of stake
May 20, 2025No plan
John T Kurtzweil
Director · sold 1,682 at $61.93
$104k
4.6% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch ACLS, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in ACLS's SEC filings or

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Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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