Yamalnefteprodukt

Yamaltek

Yaroslavl Petroleum

Yermolinskoe

Yubk Refinery

Yugekonaft

Yuggazresurs

Yugorskaya Oil Service Company

Yugranefterazvedka Yug

Yukon Refinery

Yurskneft

Yuzhno-Aksyutino

Yuzhno-Russkaya Oil Company

Yuzhno-Uralskaya Industrial Company

Yuzhuralneftegaz

Zagorsky

Zapsibnk

Zelenaya Energiya

Yamalshelf

Yargeo

Yatek

Ym Investments Limited

Yug-Resource

Yuggazinzhineering

Yugneftekhim

Yugraneft Corporation

Yugratkrs

Yurgaus

Yuzhgazneft

Yuzhno-Priobskiy Gpz

Yuzhno-Russkoe Oil

Yuzhnovladigorsky

Zabaykal Oil

Zapsib Ngk

Zaural Refinery

Zenit-Ksk