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 was established on January 1, 1964 through the merger of Naftaplin (company for oil and gas exploration and production) with the refineries in Rijeka and Sisak.

The first stage of privatization, when MOL Company became INA’s strategic partner by purchasing 25% plus one share, was completed in 2003.

MOL has increased its ownership to 47, 16% by transferring shares stored during voluntary public offer and by paying off funds to shareholders.

Subsequent doubts over legality of the acquisition in light of the Ivo Sanader corruption case led to the INA-MOL dispute, ultimately resolved in favor of MOL before the United Nations Commission on International Trade Law.

[4][5] Until now, INA has been involved in exploration and production operations in Croatia (Pannonian basin, Adriatic offshore) and 20 foreign countries.

The Company is focused on 100% reserves replacement and maintenance of production level of approximately 70,000 boe per day.

The refinery in Rijeka is located on shore, allowing access to the port for deep-drawing ships and the pipeline system of JANAF.

In February 2014 a contract on basic design for the Delayed Coking Unit for Rijeka Refinery was signed with the company Bechtel Hydrocarbon Technical Solutions (BHTS).

It began its production with 300 staff members was and with its capacity of 60,000 tons per annum the biggest refinery on the European continent.

1922 its name was changed to Raffineria di Oli Minerali S.A. From 1926 onwards the refinery was the first industrial enterprise of the Italian Agip.

[6] In the 1960s, as part of Rijeka's harbor extension the mineral-oil-port was moved to the bay of Omišalj on the island Krk (JANAF).

[6] The refinery has its own port, wharfs and offshore establishments to provide transport of goods, raw oil, petroleum products and petrolium-derivatives.

[12] According to an interview with Davor Štern in 2021,[11] who was the Minister of Economy, Labour and Entrepreneurship in the Croatian Government and head of the supervisory board of INA at the time, there is currently no interest by the MOL Group to initialize a return of INA to its Syrian oil and gas fields.