Relying on the common-law doctrine that a corporate officer owes a fiduciary duty to his employer, 800 S. Wells Commercial LLC sued its former vice president, John Cadden, for allegedly diverting a valuable business opportunity and transferring a company asset for no consideration, but the Illinois Appellate Court affirmed summary judgment for Cadden — because (1) the business was a manager-managed limited liability company and (2) Cadden merely followed instructions from the managing member, Nicholas Gouletas, for …