Lam Research Corporation Q1 2027 Earnings Recap

Lam’s shares fell 11.8% after earnings, despite record September-quarter results, as investors may have focused on the gap between strong demand and the company’s ability to supply it: management said clean-room availability and component constraints could limit deliveries in 2027. The outlook also remains preliminary, with Lam citing WFE spending above $200 billion in 2027 while warning that supply constraints may prevent the industry from fully meeting end demand.

Key Takeaways

• September-quarter revenue, gross margin, operating margin, and EPS reached records; operating margin exceeded 40% for the first time.
• Lam expects calendar 2026 systems revenue to grow well over 40% year over year, and forecasts 2026 WFE in the mid-$150 billion range.
• Management’s preliminary 2027 WFE outlook is above $200 billion, with growth led by DRAM, followed by leading-edge foundry logic and NAND.
• Supply risks temper the outlook: clean-room availability and constraints on certain components could limit capacity to meet demand, and Lam is working with suppliers to expand capacity.
• Lam raised its expected cumulative Aether-related revenue by the end of the decade to approximately $2.5 billion, about $1 billion above its prior expectation.