Aehr Test Systems (AEHR) stock fell 5.50% during intraday trading on Wednesday, marking a significant 24-hour decline for the semiconductor testing company.

The sharp drop appears to be driven by a wave of insider selling activity. Multiple executives and directors recently sold substantial amounts of company stock, which investors often interpret as a potential lack of confidence in near-term prospects.

According to regulatory filings, EVP Alberto Salamone sold shares worth approximately $2.76 million, director Rhea J Posedel sold shares worth about $1.77 million, and VP Alistair Sporck disposed of shares valued at nearly $187,000. The collective selling by key insiders likely contributed to negative market sentiment and the stock's downward pressure.