AXT shares jump 15.17% intraday as AI-driven bandwidth demand and use of indium phosphide substrates in data centers/optical communications boost investor interest.

AXT surged 15.17% intraday, driven by increased investor interest as AI-driven bandwidth demand growth highlights the use of the company’s indium phosphide substrates in data centers and optical communications. The company’s Q3 2025 earnings report emphasized its role in designing, developing, and manufacturing high-performance compound semiconductor substrates like indium phosphide and gallium arsenide, used in semiconductors and optoelectronic devices where silicon substrates cannot meet performance requirements.