PRESS RELEASE
27 February 2026

Olga Ponomarenko And Irina Bratishkina Join Cohen & Gresser In London

CG
Cohen & Gresser

Contributor

Cohen & Gresser is an international law firm with offices in New York, Paris, Washington, DC, and London. We have an outstanding record of success in high-stakes and high-profile litigation, investigations, and transactions for our clients, including major financial institutions and companies across the world. Our attorneys have superb credentials, and are committed to providing the efficiency and personal service of a boutique law firm along with the quality and attention to detail that are the hallmarks of the best firms in the world.
Cohen & Gresser is pleased to welcome Olga Ponomarenko as a partner in its London office, joined by Irina Bratishkina as an associate.
United States

Cohen & Gresser is pleased to welcome Olga Ponomarenko as a partner in its London office, joined by Irina Bratishkina as an associate. Together, they bring extensive experience advising clients on complex cross-border mergers and acquisitions, co-investments, equity capital markets transactions, and strategic corporate matters. Prior to joining the firm, Olga was a partner at Latham & Watkins, and Irina was an associate at Cleary Gottlieb Steen & Hamilton.

Olga represents private equity sponsors, sovereign wealth funds, multinational corporations, and financial institutions across a wide range of industries, including technology, energy, financial services, consumer, and infrastructure. She is particularly known for her work on multi-jurisdictional transactions, co-investments, sophisticated carve-outs and joint ventures, sanctions compliance matters, and large-scale corporate reorganizations. Her practice spans Europe, the CIS region, the Middle East, and beyond, reflecting a truly international client base.

Irina is a private equity and M&A lawyer with experience advising private equity sponsors, sovereign wealth funds, international corporations, and private investors on complex cross-border transactions. Her practice focuses on mergers and acquisitions, corporate restructurings, exits, and strategic investments across a range of sectors, including advising on transaction execution, regulatory considerations, and related compliance matters.

"The arrival of Olga and Irina strengthens our corporate capabilities both in Europe and around the world," said Daniel Mathias, managing partner of the firm's London office. "They bring a highly complementary combination of cross-border transactional experience, elite client service, commercial judgment, and deep familiarity with complex, multi-jurisdictional matters. Their addition reflects our continued growth trajectory and enhances our ability to support clients navigating multi-jurisdictional deals and evolving regulatory environments."

"I am delighted to join Cohen & Gresser and to be part of such a dynamic and internationally focused platform," said Olga. "The firm's strength in cross-border matters and its collaborative culture provide an excellent environment to continue growing our practice and serving clients on their most complex and strategic transactions. Irina and I look forward to collaborating with colleagues across all our offices to deliver seamless, commercially focused advice."

Olga and Irina join Cohen & Gresser's London office at a time of continued growth for the firm's international corporate practice, further reinforcing its capabilities in cross-border M&A, co-investments, capital markets, and strategic investments.

Contributor

Cohen & Gresser is an international law firm with offices in New York, Paris, Washington, DC, and London. We have an outstanding record of success in high-stakes and high-profile litigation, investigations, and transactions for our clients, including major financial institutions and companies across the world. Our attorneys have superb credentials, and are committed to providing the efficiency and personal service of a boutique law firm along with the quality and attention to detail that are the hallmarks of the best firms in the world.
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