A new study by the AI-Driven Enterprise Institute scored every S&P 500 member on AI adoption, giving perfect marks to Nvidia, Amazon, Meta and Schlumberger, the oilfield services firm now known as SLB. The open-source index, shared this week, rates companies on literacy, advocacy, orientation and implementation, each scored up to 100, using public material like earnings call transcripts, job openings and patent applications instead of surveys. A company's headline number averages its orientation and implementation marks, and only four firms reached a flawless 100. Walmart led non-tech firms at 95.84, trailed by utilities AES and NextEra Energy, with Ecolab, Chevron and Alphabet close behind. Paul Cheek, the institute's CEO and a senior lecturer at the Massachusetts Institute of Technology, said the ranking lets executives compare strategy without relying on self-reported claims. The index does not measure whether AI actually lifts profits, but aims to give boards an objective yardstick. Cheek argued that many directors still know too little about the technology and must grasp it to weigh risk and steer spending. The ranking arrives as large companies cite AI at an ever quickening pace; earlier this year, analysts found that a quarter of S&P 500 firms reported a measurable AI impact in the first quarter, nearly double the share a year earlier.