Greek-born billionaire John Catsimatidis rose from working in a New York grocery store to build the Gristedes supermarket chain and a wider business empire after leaving university before graduating. Now head of the Red Apple Group, with interests spanning real estate, energy, aviation and media, he remains a prominent figure in US business and politics, regularly discussing business with President Trump, despite setbacks including a collapsed airline venture and an unsuccessful run for New York mayor.
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