Melissa MacKewn

Melissa MacKewn

Crawley MacKewn Brush LLP

Recognized since 2013

Toronto, Ontario

Practice Areas

Bet-the-Company Litigation

Corporate and Commercial Litigation

Securities Law

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Lawyer of the Year Badge - 2022 - Securities Law Lawyer of the Year Badge - 2018 - Securities Law
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Melissa MacKewn has been widely and repeatedly recognized within the profession as one of Canada’s leading securities and corporate commercial litigation lawyers. Among other recognitions, Melissa has been twice voted by her peers as Best Lawyers Securities Lawyer of the Year and is part of a small and prestigious group of litigation lawyers in Canada selected by Best Lawyers, based on peer review, as “bet the company” litigation counsel.

Melissa has one of the deepest and most robust securities litigation practices in the country. She advises investors, registrants, issuers, officers, directors, underwriters, and private and public corporations on a variety of securities matters. She has extensive experience representing clients in enforcement investigations, settlements, and contested proceedings before the OSC and CIRO involving such issues as insider trading, disclosure violations and market manipulation. As a prior Senior Enforcement Counsel at the OSC, Melissa offers unparalleled insight on regulatory matters which allows her to strategically guide her clients to creative and precedent-setting outcomes when careers, reputations, livelihoods and shareholder value are on the line.

Melissa is also regularly retained by both public and private companies and their audit and special committees to conduct confidential internal investigations in respect of whistleblower complaints, disclosure, controls and reporting issues, trading and compliance issues, matters engaging conflicts of interest, and workplace allegations. Melissa’s depth of knowledge and expertise allows her to navigate the concurrent class action and regulatory risks, including cross-border risks, at issue in these mandates strategically and efficiently as a trusted advisor and business partner to her clients.

Melissa has extensive experience with corporate and securities capital markets litigation matters including securities class action proceedings, corporate and shareholder disputes, oppression remedy matters, proxy battles, takeover bid litigation, corporate governance matters and investment loss claims.

Bringing to bear the depth of her administrative law expertise, Melissa is frequently retained as outside prosecution counsel on complex disciplinary matters by self-regulatory organizations in the accounting, insurance, and financial sectors.

  • 179 John Street, Suite 800
    Toronto, ON M5T 1X4

Crawley MacKewn Brush LLP
Headquarters: Toronto, Ontario

5 The Best Lawyers in Canada awards

2 Best Lawyers: Ones to Watch in Canada awards

Visit Website View Firm Profile

Lawyer of the Year Badge - 2022 - Securities Law Lawyer of the Year Badge - 2018 - Securities Law
Named "Lawyer of the Year" by Best Lawyers® for:
  • Securities Law, Toronto, Canada (2022)
  • Securities Law, Toronto, Canada (2018)
Recognized in The Best Lawyers in Canada 2024 for work in:
  • Bet-the-Company Litigation
  • Corporate and Commercial Litigation
  • Securities Law
  • Lexpert/ALM Top 500 Lawyers in Canada
  • Benchmark Litigation Canada, Top 100 Women in Litigation
  • Chambers Canada, Band 1, Securities Litigation


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