On July 30, Lam Research rose 6.27% overnight, trading at $267.5/share, with turnover of $11,800. The surge followed the company's release of record-breaking fiscal Q4 results after market close.

Lam Research reported adjusted EPS of $1.82, beating the analyst consensus estimate of $1.68 by 8.33%, representing a 36.84% increase over $1.33 per share from the year-ago period. Revenue came in at $6.722 billion versus the $6.665 billion estimate, up from $5.17 billion a year earlier. Gross margin expanded from 49.8% to 51.7%, while operating margin improved from 35.0% to 37.4%, both reaching all-time highs.

Critically, the company issued Q1 guidance substantially above expectations, projecting non-GAAP diluted EPS of $2.00 to $2.30 on revenue of $7.70 billion to $8.50 billion, far surpassing analyst estimates of $1.84 and $7.11 billion respectively. CEO Tim Archer stated that AI-driven demand continues to reshape the semiconductor industry, fueling advanced chip production equipment orders. The earnings release also eliminated pre-report uncertainty that had pressured shares, which had previously fallen from approximately $306 to around $252 over prior sessions amid a broader memory stock selloff.

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