On July 30, Lam Research surged 22.51% in regular trading, trading at $302.415/share, with turnover of $714 million. The rally was driven by the company's fiscal Q4 earnings report released the prior evening, which delivered record results and exceptionally strong forward guidance.

Lam Research reported adjusted EPS of $1.82, beating the consensus estimate of $1.68 by 8.3% and representing a 36.8% year-over-year increase. Revenue came in at $6.722 billion, surpassing expectations of $6.665 billion and marking an all-time high. Gross margin improved to 51.7% from 49.8%, while operating margin expanded to 37.4% from 35.0%.

More critically, the company's Q1 guidance significantly exceeded expectations, projecting revenue of $7.7 billion to $8.5 billion versus analyst estimates of $7.11 billion, and EPS of $2.00 to $2.30 versus the $1.84 consensus. CEO Tim Archer stated that AI-driven demand continues to reshape the semiconductor industry. The stock had previously declined sharply from approximately $306 due to storage sector weakness and pre-earnings uncertainty, amplifying the post-results rebound.

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