Cleary Gottlieb Steen & Hamilton and Dewey & LeBoeuf have taken lead roles on the biggest deal to close in Moscow so far this year – a $4.2bn (£2.9bn) Gazprom purchase.

The deal saw Cleary advising Gazprom on its purchase of a 20% stake in its oil unit Gazprom Neft (formerly Sibneft) from Italian utility Eni. Moscow corporate finance partner Russell Pollack led the team for Cleary.