Blackstone, an alternative investment management company, agreed to acquire a majority stake in Chartis, a healthcare advisory firm. Financial terms were not disclosed. “Chartis was founded with the mission to help clients fundamentally improve healthcare delivery across the United States. Over the past 23 years, since our inception, great strides have been made. Looking to the future, we are excited to do even more. Blackstone shares our commitment to supporting industry leaders across the healthcare landscape as they strive to make care in the US more accessible, more affordable, more reliable, more equitable, and more human for patients and caregivers,” Ken Graboys and Ethan Arnold, Chartis CEO and Managing Partner.