GTCR agreed to acquire a majority stake in Jet Support Services, an independent provider of maintenance support and financial services to the business aviation industry. Financial terms were not disclosed. The transaction is expected to close in the fourth quarter of 2020. "We look forward to partnering with GTCR to take JSSI to the next level of excellence. GTCR's deep sector expertise and resourcefulness will be a tremendous asset as we embark on this growth journey," Neil Book, JSSI CEO.