AXT Inc's stock surged 5.12% in early trading on Tuesday, as investor sentiment turned bullish on the company's prospects in the AI infrastructure space.

The movement appears driven by growing optimism around demand for indium phosphide substrates, where AXT holds a leading market share of approximately 40%. The company is a key supplier for high-speed data center connectivity and AI infrastructure, with expectations of sharp revenue growth as export permit headwinds ease and manufacturing capacity utilization improves.

Additionally, the company's recent proposal to increase its authorized common shares from 70 million to 120 million signals potential growth initiatives and capital raising plans to support expansion, further fueling positive investor speculation about its future trajectory in the AI-driven semiconductor materials market.