AXT Inc. is a material science company specializing in the design, development, manufacture, and distribution of compound and single-element semiconductor substrates. Their core products include indium phosphide (InP), gallium arsenide (GaAs), and germanium (Ge) wafers, which are essential for semiconductor and optoelectronic devices that silicon alone cannot produce. These substrates are utilized in diverse end markets such as 5G infrastructure, data center connectivity (silicon photonics), passive optical networks, industrial lasers, satellite solar cells, consumer electronics sensors, and automotive applications.