NEW YORK--(BUSINESS WIRE)--TPG Specialty Lending, Inc. (“TSLX”; NYSE:TSLX), a specialty finance company focused on lending to middle-market companies, filed its preliminary proxy with the U.S. Securities and Exchange Commission (“SEC”) on September 18, 2015 and today sent a letter to all stockholders of TICC Capital Corp. (“TICC”; Nasdaq: TICC). The letter urges TICC stockholders to vote against the management proposals regarding TICC’s proposed transaction to change its external manager at the