Mark  DesLauriers

Mark DesLauriers

Partner, Corporate

Contact Information

tel: 416.862.6709



Bar Admission

Ontario, 1983


  • Osgoode Hall Law School, LL.B.
  • Queen’s University, B.Comm.



Mark practises in the area of corporate and securities law, with particular emphasis on cross-border corporate finance, public company law, and the regulation of securities dealers and advisers. He has extensive experience advising Canadian and foreign public companies, investment banks, securities dealers, financial institutions, fund managers and institutional investors on innovative financing techniques, cross-border transactions and regulatory proceedings. Mark has acted as counsel to the Canadian Securities Administrators and The Canadian Depository for Securities Limited on a variety of matters, including the development of SEDAR and SEDI. He is also a director of a number of companies and a former Chair of the Securities Advisory Committee, a special committee of securities lawyers advising the Ontario Securities Commission.

    • Advising Canadian Securities Transition Office on proposed derivatives regulations
    • Advising a global investment bank on the launch of a Canadian alternative trading system
    • Advising the controlling shareholder in the Mitel IPO
    • Advising the underwriters in the Genworth Financial Canada IPO
    • Advising the underwriters in the Capital Power IPO
    • Advising the Special Committee in the Fairfax acquisition of the Northbridge minority
    • Macquarie in its acquisition of Blackmont Capital
    • Kensington Capital on its IPO of a global private equity fund of funds
    • Financial adviser to AT&T Wireless on the sale of its minority interest in Rogers Wireless
    • Financial adviser to Manulife Financial on its acquisition of John Hancock
    • Shoppers Drug Mart Inc. on its IPO and four subsequent secondary offerings, resulting in the distribution of securities with a total value exceeding $3.8 billion
    • Connors Bros. Income Fund's underwriting syndicate in the public financing of the Fund's business combination with Bumble Bee/Clover Leaf Seafoods and a follow-on public offering
    • Northbridge Financial Corporation's underwriting syndicate in its IPO and subsequent secondary offering
    • The Toronto Stock Exchange in its acquisition by means of a corporate reorganization of the Canadian Venture Exchange Inc.
    • Vandenborre Technologies N.V. on its merger with Stuart Energy Systems Corporation
    • 360networks inc.'s underwriting syndicate on its cross-border IPO and TSX listing
    • Clarica Life Insurance Company's financial advisers on its demutualization and related IPO/TSX listing
    • The Goldman Sachs Group, Inc.'s Canadian activities with its restructuring and IPO

  • The Canadian Legal Lexpert Directory: Recognized in Corporate Commercial Law; Corporate Finance & Securities
  • The Lexpert Guide to the Leading US/Canada Cross-Border Corporate Lawyers in Canada: Recognized in Corporate Finance & Securities
  • The Lexpert/American Lawyer Guide to the Leading 500 Lawyers in Canada: Recognized in Corporate Commercial Law
  • IFLR 1000: The Guide to the World’s Leading Financial Law Firms: Recognized in Capital Markets: Equity (Notable Practitioner)
  • Who’s Who Legal: Recognized in Capital Markets - Debt and Equity (International); Capital Markets (Canada)
  • Best Lawyers in Canada: Recognized in Corporate Law; Securities Law

  • Law Society of Ontario
  • Canadian Bar Association

  • Final National Registration Rule Introduces Major Changes to Canadian Securities Laws, Osler Update, July 22, 2009.
  • Québec Derivatives Act and Québec Derivatives Regulation Now In Force, Osler Update, February 3, 2009.
  • Québec Implements Legislative Framework for Regulation of Derivatives, Osler Update, July 24, 2008.
  • CSA Propose Amended National “Soft Dollar” Legislation, Osler Update, March 4, 2008.
  • OSC Releases Findings Following Review of Marketing Practices of Investment Counsel/Portfolio Managers, Osler Update, December 3, 2007.