AXT Inc's stock experienced a sharp decline of 7.66% during intraday trading on Thursday. The move contrasted with gains in the broader semiconductor equipment sector.

The sell-off was primarily attributed to profit-taking by investors following significant cumulative gains in the stock on prior trading days. Additionally, market sentiment was weighed down by recent insider selling activity, including share disposals by the company's CEO and other directors.

Fundamental concerns also contributed to the pressure. Despite benefiting from global supply shortages of indium phosphide (InP) substrates, AXT's primary production capacity is located in Beijing and remains subject to China's stringent export controls. High rejection rates for export applications to key markets like the U.S. and Japan have raised investor concerns regarding the company's ability to fulfill orders and retain customers.