Axcelis Technologies Inc.

Last updated September 27, 2026

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Organization details

Legal name: Axcelis Technologies Inc.
Ownership: Public
Status: Active
Sector (GICS): Industrials
SIC code: 3559 — Special Industry Machinery, NEC
Jurisdiction of incorporation: Delaware
Headquarters city: Beverly
Headquarters state / province: Massachusetts
Headquarters country: United States
Fiscal year end: December
Ticker symbol: ACLS
Primary stock exchange: Nasdaq

Identifiers

SEC CIK: 0001113232
EIN: 34-1818596
Wikidata ID: Q4830196

Board of directors

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Dennis Thomas St · Director
Since 2023
Dipti Vachani · Director
Since 2023
Gregory B. Graves · Director
Since 2024
Jeanne Quirk · Director
Since 2023
John T. Kurtzweil · Director
Since 2023
Jorge Titinger · Director
Since 2023
Joseph P. Keithley · Director
Since 2023
Mary G. Puma · Director · EXECUTIVE CHAIRPERSON Overboarded
Since 2023
Necip Sayiner · Director Overboarded
Since 2024
Russell Low · Director · PRESIDENT AND CEO
Since 2023
Tzu Yin Chiu · Director
Since 2023

Chief executives

Mary G. Puma · President and CEO

Dates unknown

Russell Low · President and CEO

Dates unknown

Director election results

Annual meeting of May 5, 2026. Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.

Board connections

5 of this board's directors also sit on 13 other boards. 2 are in the same sector.

Shared director Other board Same sector

FormFactor Inc. FormFactor Inc.
via Dennis Thomas St and Jorge Titinger
Allegro MicroSystems Inc.
via Mary G. Puma
Ciena Corporation
via Mary G. Puma
Entegris Inc.
via Mary G. Puma
Ichor Holdings
via Jorge Titinger
Laird Superfood Inc.
via Gregory B. Graves
Nordson Corporation Same sector
via Mary G. Puma
Penguin Solutions Inc.
via Mary G. Puma
Power Integrations Inc.
via Necip Sayiner
Rambus Inc.
via Necip Sayiner
Sandisk Corporation
via Necip Sayiner
Teradyne Inc.
via Necip Sayiner
Veeco Instruments Inc. Same sector
via Dennis Thomas St

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Bought, last 12 months: $0; 0 purchases by 0 insiders
Sold, last 12 months: $6,416,036; 23 sales by 13 insiders

Date	Insider	Transaction	Shares	Price	Value
Sep 15, 2026	Redinbo Greg Officer (EVP and Chief Strategy Officer)	Shares withheld for tax	−208	$105.04	$21,848
Sep 15, 2026	Tatnall Christopher Officer (EVP Global Customer Operations)	Shares withheld for tax	−136	$105.04	$14,285
Jul 15, 2026	Ryzhik David Officer (SVP Interim CFO)	Shares withheld for tax	−127	$145.01	$18,416
Jul 15, 2026	Ryzhik David Officer (SVP Interim CFO)	Shares withheld for tax	−94	$145.01	$13,631
Jun 16, 2026	Ryzhik David Officer (SVP Interim CFO)	Shares withheld for tax	−76	$176.85	$13,441
Jun 15, 2026	Blumenstock Gerald M Officer (EVP, Research, Dev. & Eng.)	Shares withheld for tax	−506	$191.60	$96,950
Jun 3, 2026	Necip Sayiner Director	Open-market sale	−1,586	$157.44	$249,700
Jun 2, 2026	Mahoney Robert John Officer (EVP Global Operations)	Open-market sale	−1,155	$155.24	$179,302
May 27, 2026	Sutton Todd Officer (VP Corporate Controller)	Open-market sale	−2,000	$159.99	$319,980
May 22, 2026	Dennis Thomas St Director	Open-market sale	−900	$155.37	$139,833
May 22, 2026	Evans Eileen Officer (EVP, General Counsel and Sec'y)	Open-market sale	−926	$155.51	$144,002
May 21, 2026	Blumenstock Gerald M Officer (EVP, Research, Dev. & Eng.)	Open-market sale	−1,161	$152.70	$177,285
May 20, 2026	Tatnall Christopher Officer (EVP Global Customer Operations)	Open-market sale	−1,166	$149.75	$174,609
May 19, 2026	Gregory B. Graves Director	Open-market sale	−2,625	$141.41	$371,201
May 19, 2026	John T. Kurtzweil Director	Open-market sale	−3,500	$138.79	$485,765

Peers

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Questions about Axcelis Technologies Inc.

Who is the CEO of Axcelis Technologies Inc.?

Mary G. Puma is Axcelis Technologies Inc.'s President and CEO.

How many directors are on Axcelis Technologies Inc.'s board?

Axcelis Technologies Inc.'s board has 11 directors: Dennis Thomas St, Dipti Vachani, Gregory B. Graves, Jeanne Quirk, John T. Kurtzweil, Jorge Titinger, Joseph P. Keithley, Mary G. Puma, Necip Sayiner, Russell Low and 1 other.

Are Axcelis Technologies Inc. insiders buying or selling shares?

Over the last 12 months, Axcelis Technologies Inc. insiders made no open-market purchases and sold $6.4 million of shares in 23 sales on the open market, as reported to the SEC on Forms 4 and 5.

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