SIBUR International GmbH | 8,087 followers on LinkedIn. The SIBUR Group of Companies (www.sibur.ru) is the largest petrochemical company in Russia. It operates 26 production sites located all over Russia, has got over 1,500 large customers engaged in the energy, chemical, fast moving consumer goods (FMCG), automotive, construction and other industries. SIBUR’s export sales are around 43%.