About Lacy Naster LLP

Lacy Naster LLP is a small litigation firm in Toronto, founded by Michael Lacy and Jay Naster. The firm practices in criminal, regulatory, administrative, securities, and competition law, representing clients at the trial and appellate level across Canada. Marcela Ahumada, who built a criminal and regulatory practice at another Toronto litigation firm before joining, is the third partner at the firm.

Lacy is a Law Society of Ontario Certified Specialist in Criminal Law and a Fellow of the American College of Trial Lawyers. Lacy has appeared as counsel on more than 150 appeals to the Court of Appeal for Ontario, has argued appeals at the Supreme Court of Canada for primary litigants, and has appeared as intervention counsel for the Criminal Lawyers' Association and the Canadian Civil Liberties Association. Lacy also teaches at Osgoode Hall Law School and is a past president of the Criminal Lawyers' Association.

Naster was called to the bar in 1986 and spent 11 years as Crown counsel in the Crown Law Office (Criminal), focusing on white collar prosecutions, before joining the Ontario Securities Commission in 1997 as senior litigation counsel. Naster moved into private practice in 2005 and now represents clients in regulatory investigations and proceedings before bodies including the Securities Commissions of Ontario and British Columbia, the Financial Services Tribunal, the Canadian Investment Regulatory Organization, the Law Society of Ontario, and the License Appeal Tribunal.

In the community

  • Michael Lacy has taught at Osgoode Hall Law School for the past 10 years, as a lecturer in the International LLM program in Criminal Law and as an instructor in Forensic Science and the Law.
  • Michael Lacy is an invited advocacy adviser registered with the Supreme Court Advocacy Institute.
  • Michael Lacy is a member of the Pro Bono Inmate Appeal Program in Ontario.
  • A partner at the firm volunteered with the criminal division of CLASP and coached Osgoode Hall Law School's Baby Gale moot team for the 2019 Cassels Brock Cup Moot.
  • A partner at the firm serves on the Recent Call Committee of the Criminal Lawyers' Association.

Certified Specialists

A designation granted by the Law Society of Ontario, not a self-declared area of focus.

This firm’s lawyers at a glance

Languages on the roster
Spanish

Where to find them

18 York Street, Suite 430, Toronto, M5J 2T8

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This listing was generated by AI from public sources in August 2026. It may contain errors, and we can’t guarantee it’s accurate or complete. Before you rely on anything here, verify it on the firm’s own website. Verify licence status in the Law Society of Ontario directory ↗

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