AXT, Inc. (NasdaqGS: AXTI), a leading manufacturer of compound semiconductor substrates, will announce its financial results for the third quarter 2026 in a press release immediately following the close of market on October 29, 2026.

The company will also host a conference call to discuss these results on October 29, 2026 at 1:30 p.m. PT. The conference call can be accessed at (833) 461-5787 (passcode 457551713). The call will also be simulcast at www.axt.com. The webcast will be available at http://www.axt.com until October 29, 2027. Additional investor information can be accessed at http://www.axt.com.

About AXT, Inc.

AXT is a material science company that develops and manufactures high-performance compound and single element semiconductor substrate wafers comprising indium phosphide (InP), gallium arsenide (GaAs) and germanium (Ge). The company’s substrate wafers are used when a typical silicon substrate wafer cannot meet the performance requirements of a semiconductor or optoelectronic device. End markets include AI/data center connectivity, 5G infrastructure, passive optical networks, LED lighting, lasers, sensors, power amplifiers for wireless devices and satellite solar cells. AXT’s worldwide headquarters are in Fremont, California where the company maintains sales, administration and customer service functions. AXT has its Asia headquarters in Beijing, China and manufacturing facilities in three separate locations in China. In addition, as part of its supply chain strategy, the company has partial ownership in over ten companies in China producing raw materials for its manufacturing process. For more information, see AXT’s website at https://investors.axt.com.

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Gary Fischer

Chief Financial Officer

(510) 438-4700

Leslie Green

Green Communications Consulting, LLC

leslie@greencommunicationsllc.com