AXT, Inc. (NASDAQ:AXTI), a leading manufacturer of compound semiconductor substrates, today announced that it will participate in the upcoming financial conferences:

26th Annual B. Riley Securities Institutional Investor Conference on May 21^st in Los Angeles
23rd Annual Craig-Hallum Institutional Investor Conference on May 28^th in Minneapolis
Northland Securities Virtual Growth Conference 2026 on June 23^rd

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 5G infrastructure, data center connectivity, 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 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 L. Fischer

Chief Financial Officer

gfischer@axt.com

Leslie Green

Green Communications Consulting, LLC

leslie@greencommunicationsllc.com

AXT, Inc. Announces Financial Conference Participation for the Second Quarter 2026