HELLENiQ ENERGY | 84,723 followers on LinkedIn. Welcome to our official account | We are one of the leading integrated energy companies in Southeast Europe. Established as HELLENIC PETROLEUM in 1998, with roots dating back to Greece’s first refinery in 1958, we have grown to become Greece’s largest company and one of the biggest in SE Europe, by annual revenue. Vigorously pursuing an ambitious transformation strategy, we have evolved into a regional energy leader, and currently have a presence in 8 countries and growing international operations, with a diversified portfolio spanning across the energy value chain.