Billionaire Investors Appear to Have a Favorite Artificial Intelligence (AI) Stock Right Now -- and It's Not Nvidia

Core Insights - Nvidia is widely recognized as a leading company in the artificial intelligence (AI) sector, primarily due to its GPUs, which are essential for AI operations [1] - Despite Nvidia's popularity, Amazon is identified as the favorite AI stock among several billionaire investors, including Bill Ackman and Warren Buffett [4] Group 1: Billionaire Investors' Preferences - Nvidia remains a significant holding for billionaire investors like Ken Griffin and David Tepper, with Tepper increasing his stake by over 483% in Q2 2025 [3] - Amazon is the only AI stock held by billionaires Ken Griffin, Izzy Englander, Chase Coleman, David Tepper, Bill Ackman, and Warren Buffett [4][7] - Amazon ranks as a major holding for these investors, with Griffin increasing Citadel's stake by approximately 158% and Coleman boosting Tiger Global's position by 62% [5] Group 2: Amazon's AI Potential - Amazon has a long history of utilizing AI, although its AI assistant is considered outdated compared to competitors [6] - The appeal of Amazon as an AI investment stems from its operation of two major franchises: Amazon Web Services (AWS) and its e-commerce platform, which are both pivotal in the AI landscape [6][8] - Amazon is viewed as having substantial growth prospects related to AI, making it a preferred choice among billionaire investors [7]