Moscow, April 16, 2015 -- Moody's Interfax Rating Agency has today confirmed the Aa1.ru national scale issuer rating (NSR) of Tatneft OAO (Tatneft) and converted the company's national scale issuer rating into a national scale corporate family rating. Concurrently, Moody's Interfax has confirmed the Aa3.ru national scale corporate family rating of Nizhnekamskneftekhim PJSC (NKNK). Moody's Interfax is majority-owned by Moody's Investors Service (MIS).

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