AXT Inc (NASDAQ: AXTI) is a compound semiconductor substrate company that manufactures and sells specialty wafer substrates used in semiconductor chips and optoelectronic devices where silicon cannot meet performance requirements. Revenue comes from transactional product sales of compound semiconductor substrates, primarily indium phosphide (InP) and other non-silicon wafer materials, plus raw material sales through consolidated PRC joint ventures. AXT operates at the beginning of the semiconductor supply chain, growing single crystal ingots via its proprietary vertical gradient freeze (VGF) technology and slicing them into wafers, with all manufacturing conducted in China through its subsidiary Tongmei and associated raw material entities. The company is headquartered in Fremont, California, with production facilities in Beijing, DingXing, and Kazuo, China. Competitors exist in Japan and Germany. Key end markets include broadband and fiber optic communications, 5G infrastructure, and data center connectivity. Manufacturing is highly fixed-cost, making utilization rates the primary driver of gross margins.

Revenue model

Transactional product sales of compound semiconductor wafer substrates and raw materials. Manufacturing occurs in China through Tongmei and consolidated PRC raw material joint ventures; transfer pricing arrangements, royalty payments, and dividends flow cash back to the U.S. parent. Sales to Japanese customers are invoiced in Japanese yen, creating foreign currency exposure partially offset by a hedging program in place since 2015.

Products and services

Specialty compound semiconductor wafer substrates, including indium phosphide (InP) for broadband, fiber optic, 5G, and data center applications. Substrates are manufactured using a two-stage process: VGF crystal growth producing single-element or compound-element ingots in diameters from one inch to eight inches, followed by slicing, grinding, beveling, polishing, and cleaning. Raw materials are also sold through consolidated PRC joint venture entities including ChaoYang JinMei Gallium Ltd. and Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd.

Customers and end markets

End markets include broadband and fiber optic communications, 5G infrastructure, and data center connectivity, as disclosed in the FY2025 10-K. Sales to Japanese customers represent a material portion of revenue, sufficient to warrant a yen-denominated hedging program. International sales constitute a significant share of total revenue per the FY2025 filing.

Value-chain role

Upstream substrate supplier sitting at the beginning of the semiconductor supply chain. AXT does not design or fabricate semiconductor chips. It applies material science expertise to grow single crystal ingots and process them into wafer substrates that chip manufacturers use when silicon substrates cannot meet performance requirements.

Geographic exposure

All manufacturing is conducted in China (Beijing, DingXing, Kazuo, and Tianjin facilities as of the FY2025 10-K). Corporate administration is headquartered in Fremont, California (19,467 sq ft, lease expiring November 2028). A material portion of revenue comes from Japanese customers invoiced in Japanese yen. Most operating costs are incurred in China, with renminbi as the functional currency for foreign operations.

Competitors

Competitors in Japan (unnamed in filing), Competitors in Germany (unnamed in filing)

Source: SEC 10-K, filed 2026-03-17

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