NIS (Naftna Industrija Srbije a.d. Novi Sad) is an integrated oil and gas company based in Serbia. The business spans exploration and production of oil and natural gas, refining, wholesale and retail distribution, and related energy services across Serbia and neighboring markets. NIS is majority-owned by Gazprom Neft, with the Republic of Serbia as a significant shareholder, and is listed on the Belgrade Stock Exchange (ticker: NIIS).
The company operates the Pančevo refinery, a key refining asset in the Western Balkans, supplying Euro-standard motor fuels and other petroleum products to regional customers. Its product slate includes gasoline, diesel, jet fuel, liquefied petroleum gas (LPG), bitumen, base oils and lubricants, and petrochemical feedstocks such as naphtha. NIS also maintains storage, logistics, and a retail station network to support distribution.