
Overview
David Rosner heads the Competition and Foreign Investment Group at Goodmans. He provides strategic advice on all aspects of Canadian competition law, particularly with respect to complex mergers (including in regulated industries and mergers involving multi-jurisdictional review). David also advises on behavioral matters under Canadian competition law and mergers subject to the Investment Canada Act.
Drawing on his experience practising with a leading international law firm outside Canada, David translates the latest international competition law developments into strategic advantages for his clients in Canada.
David was the only Canadian named in Global Competition Review’s 40 under 40 in 2020, and in 2019, was honoured as one of Lexpert’s Rising Stars: Leading Lawyers Under 40. He is recognized as a leading competition lawyer by Chambers Global, Chambers Canada, The Legal 500 Canada, Best Lawyers in Canada, the Lexpert Special Edition: Canada's Leading Litigation Lawyers and The Canadian Legal Lexpert Directory. He has also been recognized as one of the most highly regarded North American partners by Lexology Index: Competition – Future Leaders since 2017, which profiles the foremost practitioners in the competition community under 45. Clients describe David as “a sharp thinker with great analytical capabilities,” and praise his “straightforward practical advice.”
Expertise
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Cannabis
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Communications and Media
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Competition and Foreign Investment
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Competition Bureau investigations
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Competition Law Litigation
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Compliance Programs and Audits
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Construction and Infrastructure
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Energy
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Entertainment
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Foreign Investment and National Security Reviews
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Merger Review
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Mergers and Acquisitions
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Mining
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Technology
Featured Work
David’s representative work includes acting for:
Canadian Competition Clearances for Large-Scale M&A
- Rogers Communications in its proposed C$20.5 billion acquisition of Shaw Communications
- Onex Corporation in its C$5 billion acquisition of WestJet Airlines Ltd., notably including clearances under the Canada Transportation Act
- Newmont Corporation in its US$10 billion merger with Goldcorp Inc., notably including clearance under the Competition Act and Investment Canada Act
- Altria Inc. on its C$2.4 billion investment in Cronos Group Inc., notably including clearance under the Investment Canada Act
- Essilor International S.A. in its €46-billion combination with Luxottica Group S.p.A.
Behavioral Matters
- a Canadian client in defence of a non-public abuse of dominance investigation by the Competition Bureau
- a non-Canadian client in defence of allegations of an agreement among competitors by the Competition Bureau
- a non-Canadian client in respect of an internal investigation arising from global price-fixing allegations
Awards & Recognition
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Best Lawyers in Canada Recognized, Competition/Antitrust Law 2026
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Chambers Global Recognized, Competition and Antirust 2025
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Chambers Canada Recognized, Competition/Antitrust 2025
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The Legal 500 Leading Individual, Competition & Antitrust 2025
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The Canadian Legal Lexpert Directory Recognized, Competition Law 2025
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Best Lawyers in Canada Recognized, Competition/Antitrust Law 2025
Credentials
Professional Involvement
David is an active member of the Canadian competition law community. He has been a professor at Osgoode Hall Law School and served as chair of several committees of the Canadian Bar Association's National Competition Law Section.
Credentials
- Osgoode Hall Law School, LL.B., 2005
- University of Winnipeg, B.A., 2002
Professional Affiliations
- Law Society of Ontario
- Ontario Bar Association
- Canadian Bar Association
- American Bar Association
Call to Bar
- 2006 Ontario
Insights
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Mining
Ontario Proposes Limits on Critical Mineral and Essential Infrastructure Investments by Non-Canadians
In a political environment charged with concerns about foreign control over critical minerals and essential infrastructure, the Ontario government has introduced new legislation to safeguard those… -
Competition and Foreign Investment
The Investment Canada Act in Rapidly Changing Times
The decision of the U.S. government to at least temporarily impose 25% tariffs on most Canadian exports raises novel questions about the treatment of U.S. investments into Canada. This update… -
Mergers and Acquisitions
Canada's Updated Merger Control Laws-How the Changes Impact Strategies for Practitioners and Merging Companies, American Bar Association
David Rosner authored Canada's Updated Merger Control Laws-How the Changes Impact Strategies for Practitioners and Merging Companies in American Bar Association's Antitrust Source Magazine. This… -
Competition and Foreign Investment
Competition Bureau Continues Enforcement Against Restrictive Covenants in Grocery Leases
The Competition Bureau announced yesterday that it has entered into an agreement with Empire Company (the parent company of Sobeys, IGA and others grocery chains) to remove a ‘property control’ that… -
Competition and Foreign Investment
The Cineplex Decision – A New Chapter Opens in Canadian Competition Law
The Competition Tribunal released its reasons in Commissioner v. Cineplex on October 3, 2024. It is the first decision under the Competition Act’s “drip pricing” misleading advertising provision… -
Competition and Foreign Investment
Canadian Government’s Approval of Glencore/Teck and a Ministerial Statement Signals Muscular New Standards for Investment Canada Act Undertakings and Metals and Minerals Transactions
Executive SummaryA recent approval under the Investment Canada Act (“ICA”), and a policy statement by the Minister, signals important developments for investors into Canada, including:The…
News & Events
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- 02:00 PM Competition and Foreign Investment
David Rosner at IPIC’s Applying Competition Law to IP Disputes
Join Goodmans partner David Rosner on October 16th at 1:00 pm for the “Applying Competition Law to IP Disputes” webinar with the Intellectual Property Institute of Canada (IPIC).This webinar will… -
100+ Goodmans Lawyers Once Again Recognized in The Best Lawyers in Canada: 2026 Edition
We are delighted to announce Goodmans LLP has once again been recognized in the 2026 edition of The Best Lawyers in Canada with 106 lawyers featured across 45 practice areas.Congratulations to Neill… -
Aging and Healthcare
The Canadian Legal Lexpert Directory 2025 Once Again Recognizes Goodmans
We are proud to announce Goodmans LLP continues to be recognized in the 2025 edition of The Canadian Legal Lexpert Directory.Congratulations to the 96 Goodmans lawyers recognized as leaders across…