Blackstone Tactical Opportunities, the opportunistic investment platform of the global investment firm The Blackstone Group, completed the acquisition of a majority stake in ZO Skin Health, a California-based global skincare brand. Financial terms were not disclosed. "We look forward to investing further in the business to drive growth and believe ZO is well positioned to continue delivering premier solutions to physicians and patients,” Ram Jagannath, Blackstone Growth and Tactical Opportunities Global Head of Healthcare.