In 2017, Declan Gallagher (49) sold a majority stake in his Donegal-headquartered Promise Gluten Free to a London-based private equity firm, Mayfair Equity Partners. The €67m deal reportedly valued the company at €100m. He started the business in 2011 and ships produce to Australia and the US. The company also has lucrative contracts with Tesco, Sainsbury's and Marks & Spencer.