 NASSAU, Bahamas--BUSINESS WIRE--OneSpaWorld Holdings Limited NASDAQ: OSW OneSpaWorld or the Company, the preeminent global provider of health and wellness services and products on-board cruise ships and in premium destination resorts around the world, today announced the commencement of a proposed underwritten secondary public offering of its common shares. OneSpaWorld is conducting a resale of common shares on behalf of Steiner Leisure Limited and certain affiliates of OneSpaWorlds 