Beth Riley is a renowned lawyer with a broad range of experience in competition / antitrust and foreign investment. With extensive capital markets experience, she has great insight into addressing complex business issues and the needs of clients, including in particular clients in Alberta’s energy sector, which is a distinctive aspect of her competition practice.  Beth brings a unique perspective on the workings of the Competition Bureau having served as an officer assessing mergers under the Competition Act prior to practicing law.

Beth advises Canadian and international clients involved in mergers, joint ventures and other alliances on the notification and clearance provisions of the Competition Act and the Investment Canada Act. She also advises on anticompetitive business practices and the development of corporate compliance policies.

Beth also has extensive experience in capital markets matters and securities offerings, public and private mergers and acquisitions, in addition to advising clients regarding corporate governance, shareholder activism and general regulatory compliance.

Beth has been recognized amongst the World’s Leading Lawyers for Business by Chambers Global in Competition and Antitrust, as well as by Lexpert as one of the most frequently recommended lawyers in Competition Law.

Speaking Engagements

Panelist, "The Hound of the Class Action: Recent Class Action Development", Canadian Transport Lawyers Association, Montréal

October 21, 2023

Teaching Engagements

  • University of Calgary, Sessional instructor at the Faculty of Law, University of Calgary: Business Law 656 – Mergers & Acquisitions (2016 – present)


Media Mentions

Rankings & Recognitions

  • Recognized in the 2024 Canadian Legal Lexpert Directory as a Most Frequently Recommended Lawyer in the area of Competition Law and a Repeatedly Recommended Lawyer in the area of Mergers & Acquisitions
  • Recognized by Chambers Global (2024) as a leading lawyer in the area of Competition / Antitrust
  • Recognized in the 2024 Lexpert/ALM500 Guide as a leading lawyer in the area of Competition
  • Recognized by Chambers Canada (2024) as a leading lawyer in the area of Competition / Antitrust
  • Recognized by Best Lawyers in Canada (2024) as a leading lawyer in the area of Competition / Antitrust Law
  • Listed in Who’s Who Legal: Canada 2023 as a leader in Competition
  • Listed in the 2023 Who’s Who Legal: Competition Guide as Recommended in the area of Competition Law
  • Recognized in the 2023 Canadian Legal Lexpert Directory as a Most Frequently Recommended Lawyer in the area of Competition
  • Recognized by Chambers Global (2023) as a leading lawyer in the area of Competition / Antitrust
  • Recognized in the 2022 Lexpert Special Edition on Canada’s Leading Litigation Lawyers as a Leading Litigation Lawyer
  • Chambers Global: The World’s Leading Lawyers for Business – Ranked, Competition/Antitrust (2021/2022);
  • Chambers Canada – Ranked, Competition/Antitrust (2021/2022);
  • Lexpert: Canadian Legal Lexpert Directory (Most Frequently Recommended – Competition Law), (2021/2022);
  • Lexpert/American Lawyer Guide to the Leading 500 Lawyers in Canada, Lexpert Special Edition – Energy and Litigation (2021/2022);
  • Best Lawyers in Canada and Who’s Who Legal (2021/2022)

Education & Admissions

Called to the Alberta Bar
Bachelor of Laws University of Toronto
Master of Arts, Economics Queen’s University
Bachelor of Arts, Economics, Honours (First Class) St. Francis Xavier University


Insights (16 Posts)View More

Featured Insight

New Era of Foreign Investment Scrutiny Starts in Canada with Passage of Investment Canada Act Amendment Bill

Bill C-34 amends the Investment Canada Act to enhance the government of Canada's national security review powers.

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Mar 27, 2024
Featured Insight

Canada’s New Policies on Investments in the Interactive Digital Media Sector

On March 1, 2024, the Canadian government introduced new policies to increase scrutiny of foreign investments in Canada's Interactive Digital Media sector.

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Mar 6, 2024
Featured Insight

2024 Changes to Canada’s Thresholds for Merger Notification and Investment Canada Act Reviews

Providing updates on the 2024 merger thresholds under Canada's Competition Act and Investment Canada Act.

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Feb 28, 2024
Featured Insight

Competition Act Amendments Proceed at Pace

Bill C-56, the Affordable Housing and Groceries Act, part of the federal government’s efforts to overhaul the Competition Act, has received Royal Assent.

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Dec 28, 2023
Featured Insight

Transformative Change: Your Guide to Canada’s Breathtaking Competition Act Changes

We provide a summary of far-reaching Competition Act amendments proposed in 2023.

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Dec 5, 2023
Featured Insight

Competition Bureau Settles Investigation into Deceptive Marketing Practices

Competition Bureau settles claims of deceptive marketing practices following investigation into pricing & marketing practices - $3.25MM penalty

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Oct 30, 2023
Featured Insight

Competition Act Amendments on a Rocket Docket

Bill C-56 introduces amendments to the Competition Act, which are described as addressing rising grocery prices, but which have much broader implications.

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Sep 26, 2023
Featured Insight

A Shopping Cart of Competition Law Changes

The Government announced amendments to the Competition Act as part of its announcement regarding combatting escalating grocery prices.

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Sep 18, 2023
Featured Insight

Key Developments in Competition & Foreign Investment Law: A Cross-Canada Update from McMillan’s National Team

Join us to explore key developments in Canadian competition and foreign investment law. Topics will include new no-poach / wage-fixing offence, Investment Canada Developments, technology markets, greenwashing, class action developments, upcoming Competition Act amendments and more!

Thursday, October 5, 2023
Featured Insight

Federal Court of Appeal Upholds Competition Tribunal’s Approach to the Controversial Efficiencies Defense

FCA decision on the Secure/Tervita merger confirmed the Competition Tribunal's earlier treatment of the efficiencies defence under s. 96 of the Competition Act.

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Sep 6, 2023
Featured Insight

Navigating to a Sustainable Energy Future: “Inefficient” Fossil Fuel Subsidies

This bulletin discusses the Government of Canada's recently-announced strategy to phase-out "inefficient" fossil fuel subsidies.

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Aug 2, 2023
Featured Insight

Alberta’s Carbon Pricing Emissions Trading System: Criminal Charges Laid

This bulletin discusses recent criminal charges brought under Alberta's emissions reporting and reduction legislation.

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Aug 1, 2023
Featured Insight

Modernization of the Investment Canada Act is Underway

The Canadian federal government introduced Bill C-34, An Act to Amend the Investment Canada Act, to modernize Canada’s national security regime.

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Dec 12, 2022
Featured Insight

Squeaky “Clean”: Competition Bureau Combats Greenwashing

Competition law developments aimed at addressing "greenwashing" (misleading environmental claims), including increased scrutiny by the Bureau.

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Nov 10, 2022
Featured Insight

Foreign Investment in Canada: Minerals are Critical and Annual Report Released

The government’s approach to reviewing foreign investment is evolving, with an increased focus on national security concerns.

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Nov 7, 2022
Featured Insight

Green or Grey: Regulators Target Greenwashing, Misleading Environmental, Social and Governance (ESG) Claims

An overview of risks and best practices for companies in relation to environmental, social and governance (“ESG”) claims and disclosure.

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Oct 19, 2022

Deals & Cases (1 Posts)

Featured Insight

Domtar Corporation Acquires Resolute Forest Products

On July 5, 2022, Domtar Corporation, a wholly-owned subsidiary of The Paper Excellence Group, entered into an Agreement and Plan of Merger with Resolute Forest Products Inc.

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Mar 1, 2023