Joseph W. Allen

Sophie Melchers practises mainly in the areas of commercial, corporate and securities litigation. She has represented clients before the Quebec courts and the Supreme Court of Canada in connection with disputed take-over bids, dissenting shareholder remedies, plans of arrangement, insider trading and market manipulation. Her broad experience in securities litigation also encompasses representation of reporting issuers and their officers in connection with investigations conducted by the AMF, ...

Yaël Lachkar is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Yaël, who practices law in Westmount, Quebec, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Yaël is held by other top lawyers in the same geographic and legal practice area.

Warren Katz is a Partner in the Corporate Group. He previously served as Managing Partner of the Montréal office and as a member of the firm’s Executive Committee and Partnership Board. Warren specializes in Canadian and cross-border mergers and acquisitions, private equity and corporate finance transactions, including representing broad and varied public and private companies across many industries. He offers over 25 years of extensive experience, including strong cross-border c...

Myriam Fortin is a partner and heads the Montréal office’s Environmental Group. Myriam acts on a wide range of corporate, transactional and environmental litigation matters. She advises and represents clients in their dealings with both private parties and governmental authorities regarding all regulatory and contractual environmental issues which may arise in the context of new projects, ongoing operations, purchase and sale transactions, reorganizations, leases, financing, chan...

Marianne Plamondon, MBA, CHRP, is a partner in the Montréal office of Langlois Lawyers and is also a member of the firm’s Board of Directors. She specializes in labour and employment law, particularly in the interpretation and application of collective agreements, occupational health and safety, psychological harassment, the protection of personal information, pay equity, employment insurance and human rights. She has been active in several files involving individual and collecti...

Luc Lissoir is a partner in the firm's Montréal office, practising in securities and corporate and commercial law with particular emphasis on public and private securities offerings, project financing, private equity, mergers and acquisitions and general corporate counselling. After having served as managing partner for Lafleur Brown from 1995 to 2000 and for Gowlings from 2000 to 2007 and following a change in governance, Luc was an active member of the six person Board of Trustees of...

Laurent Nahmiash is a member of the board of the Montréal office and co-Chair of the Canadian Class Action Practice Group. His practice primarily consists of class action defence work, as well as commercial and insurance litigation. Laurent currently represents numerous automotive and other manufacturers and finance companies in various consumer protection and product liability class actions. As well, he is currently involved in various anti-trust, securities, auditor and D&O class...

Éric Marquette is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Éric, who practices law in Laval, Quebec, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Éric is held by other top lawyers in the same geographic and legal practice area.

Olivier Godbout is a partner in the Corporate Group. His practice focuses primarily in the areas of securities, corporate finance, domestic and cross-border public and private mergers and acquisitions, and governance matters. Olivier advises clients from a wide range of industries, including transportation, telecommunications and manufacturing. In 2016, Olivier worked in Stikeman Elliott’s London office where he acted for issuers and underwriters in corporate finance transactions as wel...

Ronald W. Silverson is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law. Ronald W., who practices law in Montréal, Quebec, has been recognized since 2006. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ronald W. is held by other top lawyers in the same geographic and legal practice area.