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GT Advanced Technologies's Overview

Total employees556
HeadquartersMerrimack
Founded1994

GT Advanced Technologies Inc. (GTAT) was a diversified technology company known for its crystal growth equipment and advanced materials, primarily sapphire and silicon carbide (SiC). Historically, GTAT provided equipment and solutions for the solar, LED, and electronics industries. The company gained significant attention for a major deal with Apple to produce sapphire glass, but subsequently filed for Chapter 11 bankruptcy in 2014. After restructuring, GTAT focused on silicon carbide and sapphire materials. In August 2021, ON Semiconductor (now onsemi) announced the acquisition of GT Advanced Technologies for $415 million, integrating GTAT's expertise in SiC crystal growth to bolster onsemi's capabilities in intelligent power and sensing solutions, particularly for electric vehicles, EV charging, and energy infrastructure.

Where is GT Advanced Technologies's Headquarters?

HQ Function

The Merrimack facility, formerly GTAT's HQ, now serves as a crucial site for onsemi's silicon carbide (SiC) crystal growth, research and development, and manufacturing operations. It supports the production of SiC wafers for power electronics.

Notable Features:

Advanced crystal growth furnaces, state-of-the-art metrology and characterization labs for SiC and sapphire materials. The facility is designed for high-volume production of advanced materials.

Work Culture:

As part of onsemi, the work culture emphasizes innovation, collaboration, and quality in the development and manufacturing of cutting-edge semiconductor materials. It likely retains a strong engineering and research focus inherited from GTAT.

HQ Significance:

This location is significant for its role in advancing SiC technology, which is critical for next-generation power electronics in electric vehicles, renewable energy, and industrial applications. It represents a key part of onsemi's vertical integration strategy for SiC.

Values Reflected in HQ: The facility reflects values of technological leadership, precision manufacturing, innovation in materials science, and a commitment to supplying critical components for a sustainable future (e.g., EVs, energy efficiency).

Location:

Historically, GT Advanced Technologies had a global presence supporting its sales, service, and manufacturing operations, particularly in North America, Europe, and Asia. Key functions included direct sales, field service engineering for its crystal growth systems, and supply chain management for its materials business. This global footprint is now integrated into onsemi's much larger worldwide operations, which include design centers, manufacturing facilities, and sales offices across the globe.

Street Address:

243 Daniel Webster Hwy

City:

Merrimack

State/Province:

New Hampshire

Country:

USA

GT Advanced Technologies's Global Presence

Salem, Massachusetts, USA

Address: Unavailable (Historically a key manufacturing and R&D site, especially for sapphire furnaces)

Served as a primary hub for GTAT's sapphire furnace business, supporting global customers in the LED, consumer electronics, and specialty materials markets.

Hong Kong, China

Address: Unavailable (Historically a sales and support office)

Facilitated business development, customer relationship management, and technical support for the Asian market, crucial for the company's global reach.

Buying Intent Signals for GT Advanced Technologies

Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.

Notable news
Hiring actively
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
*Example signal, not calculated in real time

Executive Team of GT Advanced Technologies

As of April 2025, GT Advanced Technologies' leadership includes:

Tom Gutierrez - Former President and Chief Executive Officer
Richard J. Gaynor - Former Chief Financial Officer
Greg Knight - Former CEO (after emergence from bankruptcy, prior to onsemi acquisition)

Investors of GT Advanced Technologies

GT Advanced Technologies has been backed by several prominent investors over the years, including:

Publicly Traded on NASDAQ (Ticker: GTAT) before bankruptcy
Various institutional investors (when publicly traded)
GFI Energy Ventures (Early private equity investor in GT Solar)

Executive New Hires/Exits in the Last 12 Months

Hire0
Exits0

GT Advanced Technologies was acquired by onsemi in October 2021. As such, specific executive movements for 'GT Advanced Technologies' as a standalone entity are no longer applicable. Any relevant leadership changes would be within onsemi's corporate structure.

Departures

N/A, No specific executive departures for GT Advanced Technologies as a standalone entity.

New Appointments:

N/A, No specific executive appointments for GT Advanced Technologies as a standalone entity.

Technology (Tech Stack) used by GT Advanced Technologies

Discover the tools GT Advanced Technologies uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.

GT Advanced Technologies Email Formats and Examples

Historically, GT Advanced Technologies likely used common corporate email formats. Since its acquisition by onsemi, any active email addresses for former GTAT personnel now integrated into onsemi would follow onsemi's email format.

Historical: [first].[last]@gtat.com or [first_initial][last]@gtat.com. Current (as part of onsemi): [first].[last]@onsemi.com

Format

example.name@onsemi.com

Example

75 (for onsemi.com format, assuming a valid employee)%

Success rate

News and media

onsemiAugust 26, 2021

onsemi to Acquire GT Advanced Technologies

onsemi (Nasdaq: ON) today announced it has entered into a definitive agreement to acquire GT Advanced Technologies (GTAT), a producer of silicon carbide (SiC). The acquisition will enhance onsemi's ability to secure and grow supply of SiC and meet rapidly growing customer demand for SiC-based solutions in sustainable ecosystem....more

ReutersOctober 6, 2014

Apple supplier GT Advanced files for bankruptcy

GT Advanced Technologies Inc, a U.S. supplier of sapphire material to Apple Inc, filed for bankruptcy protection on Monday, a surprising Cmove that wiped out nearly all of the company's stock market value....more

onsemiNovember 1, 2021

onsemi Completes Acquisition of GT Advanced Technologies

onsemi (Nasdaq: ON) today announced that it has completed its acquisition of GT Advanced Technologies (GTAT), a producer of silicon carbide (SiC). This acquisition enhances onsemi’s leadership in SiC and supports the company’s commitment to invest in disruptive, high-growth technologies....more

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