Best Lawyers in Ontario, Canada for Corporate and Commercial Litigation

Jordan Diacur is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Commercial Litigation. Jordan, who practices law in Hamilton, Ontario, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jordan is held by other top lawyers in the same geographic and legal practice area.

Jennifer Teskey is Canadian managing partner, chair of our Canadian Management Committee and a member of our Global Executive Committee. She practises in corporate and commercial litigation, with an emphasis on class actions, securities, accounting, regulatory and energy-related matters. Clients represented by Ms. Teskey include professional regulators, pharmaceutical, financial services, manufacturing, transportation, technology and energy companies. She has appeared before all levels of Ont...

Ren Bucholz is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Commercial Litigation. Ren, who practices law in Toronto, Ontario, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ren is held by other top lawyers in the same geographic and legal practice area.

Practices in the areas of health law, appellate litigation and commercial litigation with focuses on commercial arbitrations, business and contractual disputes, shareholder disputes, administrative and public law, tribunals and commissions, professional negligence discipline, employment disputes, and appeals Professional Achievements and Recognition Certified as a Specialist in Civil Litigation by the Law Society of Upper Canada Recognized and recommended by Lexpert as a leading lawyer in the...

Sean M. Sullivan is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Commercial Litigation and Insurance Law. Sean M., who practices law in Kitchener, Ontario, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sean M. is held by other top lawyers in the same geographic and legal practice area.

Ken Prehogan is known for his uncompromising representation of clients involved in some of Canada's most challenging civil litigation matters. He is the head of the firm's litigation practice. Ken is trial and appellate counsel in all manner of corporate, commercial and real estate matters. He has represented public and private companies, directors and shareholders, financial institutions, provincial governments, crown corporations, municipalities, public utilities, real estate developers, ho...

Orestes Pasparakis is co-chair of our Canadian special situations team, which encompasses Canada’s leading shareholder activist practice, sophisticated securities litigation and complex reorganization transactions. Mr. Pasparakis has led and won some of Canada's most contentious and complex corporate disputes. Mr. Pasparakis focuses on high-stakes disputes that often proceed in “real time” or on an urgent basis. His approach is practical and results-oriented. Many of his cas...

Crawford combines expertise with strategy to represent clients in corporate and commercial litigation, regulation, securities, professional liability, energy proceedings, insurance, competition litigation, public and administrative law, with substantial expertise in class actions. He has significant experience engaging complex disputes that demand subject-matter experience involving specialized and highly regulated industries in the energy, infrastructure, telecommunications, and financial se...

Pierre Champagne is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Commercial Litigation. Pierre, who practices law in Ottawa, Ontario, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Pierre is held by other top lawyers in the same geographic and legal practice area.

Louis Frapporti is a partner in the the firm's Hamilton office. His practice covers a wide range of areas including product liability and insurance litigation, negligence and other tort actions, contractual disputes, and appellate advocacy. Following his call to the bar in 1992, he served a two-year appointment as a clerk to the Chief Justice of Ontario. In addition to his role as an advocate, Louis has occupied a number of management and administrative positions within the firm, including Ch...

Edward Marrocco is a top attorney recognized by Best Lawyers in the practice area(s) of Administrative and Public Law, Corporate and Commercial Litigation, Criminal Defence and Health Care Law. Edward, who practices law in Toronto, Ontario, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Edward is held by other top lawyers in the same geographic and legal practice area.

Steven Sofer is a partner in Gowling WLG's Toronto office, practising in the area of advocacy. He has been actively involved in class actions for almost 20 years, acting primarily for defendants in product liability and securities matters. Achieving the best possible result on budget and in a timely manner is Steven’s prime directive. He provides unhedged practical advice, regular prompt and concise reporting, and is always available. Where a fair settlement is achievable and is the opt...

Linda R. Rothstein is a top attorney recognized by Best Lawyers in the practice area(s) of Administrative and Public Law, Alternative Dispute Resolution, Appellate Practice, Bet-the-Company Litigation, Class Action Litigation, Corporate and Commercial Litigation, Health Care Law and Labour and Employment Law. Linda R., who practices law in Toronto, Ontario, has been recognized since 2006. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Linda ...

Mark is a Partner at Ross & McBride LLP. He is the head of the Estate and Commercial Litigation Groups. Mark's practice focuses on commercial and estate litigation. He acts for a variety of clients that include public and private companies, institutions and individuals. With over twenty years of trial and advocacy experience, Mark has handled many complex cases and has appeared in all levels of court in Ontario.

Keith A. MacLaren is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Commercial Litigation. Keith A., who practices law in Ottawa, Ontario, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Keith A. is held by other top lawyers in the same geographic and legal practice area.

Patrick Flaherty is a top attorney recognized by Best Lawyers in the practice area(s) of Class Action Litigation, Corporate and Commercial Litigation and Director and Officer Liability Practice. Patrick, who practices law in Toronto, Ontario, has been recognized since 2017. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Patrick is held by other top lawyers in the same geographic and legal practice area.