OAO Gazprom (English: Open Joint Stock Company "Gazprom", Russian: Открытое акционерное общество "Газпром" Otkrytoye aktsionernoye obshchestvo "Gazprom") is the largest extractor of natural gas in the world and the largest Russian company. The major part of Gazprom's production fields are located around the Gulf of Ob in Yamalo-Nenets Autonomous Okrug in Western Siberia, while the Yamal Peninsula is expected to become the company's main gas producing region in the future. Gazprom possesses the largest gas transmission system in the world, with 158,200 kilometers of gas trunk lines.