Sergei Ostrovsky

Sergei has practiced with Ashurst Perkins Coie since 2000, most recently as a partner and senior consultant in the firm's London office. He is responsible for the Russia & CIS practice. His geographical focus covers 15 jurisdictions of the former Soviet Union (including Central Asia) and Southern Africa.

Acting for companies or shareholders he advised on transactions with a cumulative value over US$ 30 billion over the years, including multi-jurisdictional private M&A; complex shareholder/JV agreements; shareholder activism; debt finance (acting for borrowers), as well as corporate finance comprising debt and equity both as private investments and London capital markets. Working closely with colleagues in other jurisdictions Sergei has developed deep experience in sanctions-compliant cross-border corporate transactions across several industries including automative, manufacturing; media; mining; natural resources, and pharma. Since 2014, Sergei has developed deep knowledge in international sanctions related to Russia, not only from the compliance perspective but also in the transactional context.

From 2016 to 2026 Sergei was a member of the International Committee of the Law Society of England and Wales. He regularly speaks at professional conferences and delivers lectures and masterclasses to academic and professional audiences including foreign practitioners.