In 1965, operating from a bakehouse in Lambersart, Holder began supplying Les Nouvelles Galeries in France (Lille) with bread. His customer list soon included Auchan, Nouvelles Galeries and later Monoprix. This was the first step in the creation of his production company, the “Moulin Bleu” brand. By 1970, he was able to expand his business into the mass retail sector through his purchase of a property at La Madeleine in the suburbs of Lille where he established his first Moulin Bleu bakery plant. He continued to expand both the Moulin Bleu and Paul businesses and broadened the reach of the business by acquiring sites in selected French cities.