Warburg Pincus has announced that a Warburg Pincus-led investor group has agreed to acquire a controlling interest in PANTHERx Rare from Nautic Partners, General Atlantic and The Vistria Group, supported by a material minority investment from a subsidiary of the Abu Dhabi Investment Authority. Nautic Partners and PANTHERx management will remain significant shareholders alongside the new investor group, while General Atlantic and The Vistria Group are exiting their positions.

PANTHERx Rare, founded in 2011 and based in Pittsburgh, Pennsylvania, is an independent rare pharmacy. Warburg Pincus, founded in 1966 and based in New York, is a global private equity firm focused on growth investing. Nautic, based in Providence, Rhode Island, is a middle market private equity firm focused on healthcare investments. General Atlantic, founded in 1980 and based in New York, is a global growth equity firm. The Vistria Group, founded in 2013 and based in Chicago, focuses on middle market healthcare companies.

Terms of the transaction were not disclosed. Industry reports valued the transaction at more than $7 billion.