Microsoft says that it's planning to invest $4 billion in Wisconsin to build a second artificial intelligence data center, bringing its total commitment in the state to more than $7 billion. According to a September 18 blog post from Microsoft president Brad Smith, the newly-announced project will be in addition to a $3.3 billion Mount Pleasant, Wisconsin, facility slated to come online in early 2026. The second data center — slated to open in 2027 — will be located in nearby Fairwater, and will be similar in size and scale to the Mount Pleasant facility. "This is where the next generation of AI will be trained, setting the stage for breakthroughs that will shape the future," Smith said. "New discoveries in medicine, science and other critical fields will start right here, with the models we train in Wisconsin."