The Technology Select Sector SPDRETF (XLK) has doubled in value over the past five years, outperforming the S&P 500 by around 115%. However, this gap underrepresents what a handful of AI companies have been doing well. They are Broadcom (AVGO), Micron Technology (MU), and Alphabet (GOOGL), each playing a significant role in the AI economy. Broadcom builds custom AI chips for hyperscalers, Micron supplies the memory powering every AI processor, and Alphabet operates Google Cloud. Each company's AI semiconductor revenue reached $6.5 billion in Q4 of fiscal 2025, representing a 74% increase year over year, and Broadcom expects its total AI backlog to exceed $73 billion.