The massive deal, which had been previously referenced in an August securities filing without identifying the client, signals a significant expansion for the data center operator. Investors responded sharply to the news, building on a year-to-date gain of 13% recorded at Friday’s market close. By tethering its infrastructure growth to Anthropic, a major player in the artificial intelligence sector, Rum Group solidifies its position as a key provider for high-demand computing power. The Maysville facility remains the focal point of this partnership, serving as the physical hub for the substantial capacity lease.