Entegris stock plummeted 5.04% during intraday trading on Monday.

The decline is attributed to continued profit-taking pressure following the company's recent quarterly earnings report. Despite beating analyst estimates, the stock experienced selling as funds that had positioned ahead of the results locked in gains, exhibiting a classic "sell-the-news" pattern.

Furthermore, broad weakness across the semiconductor equipment sector intensified the downward pressure on Entegris shares during the session.