MERRIMACK, NH, Oct. 29, 2013 — GT Advanced Technologies (NASDAQ: GTAT) is exhibiting at Materials Science & Technology (MS&T) Conference and Exhibition in Montreal, Canada October 29 and 30 at booth 1412. This is the company’s first thermal processing trade show since its acquisition in May, 2013 of Thermal Technology.

“We have been delivering advanced process technology solutions for our many valued customers since 1946, and continue to do so under the GT banner,” said Matt Mede, general manager of GT’s Advanced Thermal Processing Group. “We will be showcasing our range of innovative sintering furnaces at the show. Our staff, office location and commitment to providing innovative thermal processing solutions and responsive customer service remain unchanged. Only the name is new.”

GT is modifying the power supply for specific laboratory-scale pressing systems which will result in cost savings for the customer. The company is also exploring ways to leverage its global supplier network to improve lead time and delivery for advanced thermal systems.

GT is a leading U.S.-based manufacturer of spark plasma sintering (SPS) systems offering both SPS and direct current sintering (DCS) technologies. GT offers a wide range of high temperature furnaces, decades of technical innovation, process knowledge, full-factory testing, installation assistance and aftermarket support.

About GT Advanced Technologies Inc.

GT Advanced Technologies Inc. is a diversified technology company with innovative crystal growth equipment and solutions for the global solar, LED and electronics industries. Our products accelerate the adoption of new advanced materials that improve performance and lower the cost of manufacturing. For additional information about GT Advanced Technologies, please visit www.gtat.com.

Contacts:

Media
Jeff Nestel-Patt
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603-204-2883This email address is being protected from spambots. You need JavaScript enabled to view it.”>

Investors/Analysts
Ryan Flaim
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603-681-3869This email address is being protected from spambots. You need JavaScript enabled to view it.”>