Chambers Review
Provided by Chambers
Competition/Antitrust - South Africa
What the Team is Known For
Deneys assists clients with merger control notifications, often involving the financial services sector. The team also represents clients from the technology and energy industries in investigations into possible abuses of dominant positions. Team members have further experience in competition law compliance mandates. In March 2026 the firm once again became independent, after more than a decade operating as Norton Rose South Africa.
Strengths
Deneys' team has been quite hands on, quite helpful and very thorough and comprehensive in the engagement.
The Deneys team demonstrates strong commercial awareness. The recommendations are always practical and implementable, taking into account current market conditions.
Team members at Deneys are always available and responsive.
Deneys consistently demonstrates a deep understanding of our matters, both in regard to the matter itself and to its context within the industry and broader environment.
Work Highlights
Deneys assisted the Industrial Gas Users Association of South Africa with lodging a complaint against Sasol Gas before the Competition Commission alleging excessive pricing of piped gas in South Africa.
Notable practitioners
Marianne Wagener heads the antitrust and competition practice of Deneys. She assists clients with merger control filings and investigations into allegations of price maintenance, as well as helping them to challenge dawn raids. She acts for a range of high-profile clients in sectors including financial services, energy and natural resources, and digital platforms.
Marianne Wagener successfully delivers complex projects without fail.