INA-Industrija nafte, d.d. is a Croatian multinational oil company. INA Group has leading role in Croatia's oil business, a strong regional position in the oil and gas exploration and production, oil processing, and oil product distribution activities. INA, d.d. is a stock company with the Hungarian MOL Group and the Croatian Government as its biggest shareholders, while a minority of shares is owned by private and institutional investors. INA shares have been listed at the London and Zagreb stock exchanges since December 1, 2006. INA Group is composed of several affiliated companies wholly or partially owned by INA, d.d.. The Group has its headquarters in Zagreb.

MOL Plc., also known as MOL Group, is a Hungarian multinational oil and gas company headquartered in Budapest, Hungary. Members of MOL Group include among others the Croatian and Slovak formerly state-owned oil and gas companies, INA and Slovnaft. MOL is Hungary's most profitable enterprise, with net profits of $770 million in 2019. The company is also the third most valuable company in Central and Eastern Europe and placed 402 on the Fortune Global 500 list of the world's largest companies in 2013.