On September 4, KLA Corporation (NASDAQ:KLAC) gained 7.3% and Lam Research Corporation (NASDAQ:LRCX) rose 5.1%, significantly outpacing Nvidia's 0.8% increase. These companies, which sell process-control and fabrication equipment for advanced logic, memory, and packaging, are seen by some as a test of whether investors are shifting focus from direct AI beneficiaries to the underlying manufacturing capacity. While KLA reported Q4 revenue of $3.66 billion and Lam Research Q2 revenue of $6.72 billion, both citing AI-driven demand, analysts note no company-specific catalyst was confirmed for the rally. The market is now watching for continued customer capital spending to determine if this broadening has operational depth beyond a single optimistic session.