PJSC Rosneft Oil Company (Росне́фть stylized as ROSNEFT) is a Russian integrated energy company headquartered in Moscow. Rosneft specializes in the exploration, extraction, production, refining, transport, and sale of petroleum, natural gas, and petroleum products. The company is controlled by the Russian government through the Rosneftegaz holding company. Its name is a portmanteau of the Russian words Rossiyskaya neft (Российская нефть).
Rosneft was founded in 1993 as a state enterprise and then incorporated in 1995, acquiring a number of state-controlled gas and oil assets. It became Russia's leading oil company after purchasing assets of the former oil company Yukos at state-run auctions. After acquiring OJSC TNK-BP in 2013, then one of the largest oil companies in Russia, Rosneft became the world's largest publicly traded petroleum company.
Rosneft is the third-largest Russian company and the second-largest state-controlled company (after Gazprom) in Russia in terms of revenue (₽4,134 billion). Internationally, it is one of the largest oil companies, ranking 24 in terms of revenue. In the 2020 Forbes Global 2000, Rosneft was ranked as the 53rd-largest public company in the world. The company operates in more than twenty countries around the world.
Rosneft has played a major role in the history of Russia's oil industry. The first use of the name Rosneft dates back to the late 19th century, when exploration of oil fields in Sakhalin began in 1889. Most of Rosneft's current assets were acquired during the Soviet era.
Rosneft was established in 1993 as a unitary enterprise with assets previously held by Rosneftegaz, the successor to the Soviet Union's Ministry of Oil Industry. During the early 1990s, almost all Russian oil companies and refineries were extracted from Rosneft to form ten integrated companies. Later their number was halved as a result of acquisitions. On 29 September 1995, an Order of the Government of Russia No. 971 transformed Rosneft into an open joint stock company.