July 22 (Reuters) - Shares of Ryan Specialty Group Holdings Inc rose 9% in their New York Stock Exchange Debut on Thursday, fetching a market capitalization of $6.5 billion for the insurance brokerage founded and led by industry veteran Patrick Ryan. The stock opened at $25.60 per share, higher than the initial public offering price of $23.50 per share. (Reporting by Niket Nishant in Bengaluru; Editing by Ramakrishnan M.) Our Standards: The Thomson Reuters Trust Principles.