ASML Holding (AS:ASML) shares plunged more than 15.6% Tuesday after the semiconductor equipment maker reported third-quarter results that fell short of analyst expectations, while its guidance disappointed investors.

ASML’s disappointing bookings likely also factored into its share price slump today. A company’s bookings data helps track the value of the contracts it signed in a given quarter. For ASML, that number stood at €2.6 billion during the three months ended September, less than half the €5.6 billion that analysts had anticipated.

Computer chip equipment maker ASML reported on Tuesday third-quarter earnings that surprised markets with weak bookings and lower than expected sales forecasts for 2025, sending the company's shares to their biggest one-day drop since 1998.