Mark Opashinov

Practice Areas

Mark Opashinov is a partner in McMillan’s Competition and Business Law groups. For nearly three decades he has advised Canadian and international clients on the full spectrum of competition and foreign investment review issues, including merger control, cartel investigations, abuse of dominance, distribution practices, and misleading advertising. He is regularly retained to lead multi-jurisdictional merger clearance processes and is known for navigating regulatory risk in transactions that attract scrutiny in Canada and abroad. Mark’s transactional practice covers major acquisitions, divestitures, restructurings, and joint ventures. Clients rely on his ability to integrate competition and investment review strategy with commercial objectives and his experience negotiating with regulators in sensitive, time-critical contexts. He is recognized for advancing legal project management and the use of technology in complex matters, particularly in large-scale e-discovery exercises arising from regulatory investigations and litigation. Peers and clients alike value his technical depth, sound judgment, and practical, strategic advice. Mark publishes and speaks on competition and foreign investment topics. He is also the General Editor of Rowley and Baker: International Mergers – The Antitrust Process.