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We have a long and extensive track record of advising clients on merger control requirements and representing them in UK, EU and international merger control proceedings. We have an award-winning UK merger control practice, having won Legal Business Awards Competition Team of the year 2020 for steering a complex digital merger to an unexpected phase one unconditional clearance. We are strategic advisors, combining  quality advocacy and practical project management of all regulatory filings – merger control, FDI and regulatory. We cooperate closely with our CMS M&A team which consistently advises on the greatest number of M&A transactions of all law firms in Europe. In addition, many clients entrust us directly with their merger control cases. We have represented clients successfully in numerous landmark merger cases in the UK and internationally, often shaping major sectors of the economy.

Merger control and FDI is where our exceptionally wide footprint is particularly valuable with 225 CMS competition lawyers across CMS offices in Europe, Asia, Africa and South America. This, together with a very extensive network of long-established contacts across all other relevant countries worldwide (e.g., via the World Law Group), allows us to offer a one-stop shop solution for all of our clients’ transactions. 

On a daily basis we steer our clients through any “gun-jumping” pitfalls in the context of the due diligence process and the preparatory phase between signing and closing. And we set up the necessary safety mechanisms to ensure compliance with competition laws during the transaction process (clean teams, data rooms etc.). 

We also represent the interests of third parties to achieve their strategic goals concerning mergers between other industry players.

Explore more

Türkiye Updates Merger Control Rules to Reflect Economic Reality

23 Feb 2026 6 min read

Regulation nation? UK regulators in 2026

23 Jan 2026 3 min read

UK competition law enforcement: a multi-regulator perspective

08 Oct 2025 1 min read

Government confirms reform to media ownership and merger control rules

14 Jul 2025 5 min read

Focus on the future: CMA's pro-growth strategic priorities for 2025-6

07 Apr 2025 6 min read

More changes ahead for the UK media mergers regime

21 Mar 2025 13 min read

Violation of EU competition law: Commission fines Mondelez EUR 337.5m for cross-border trade restrictions

31 May 2024 7 min read

CMS Emerging Europe M&A Report 2023/2024

26 Jan 2024 3 min read

Events

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    08 Apr 2026

    CMS at Fordham IP & Policy Conference

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    13 Apr 2026

    Skills for Future Facing Teams: Creating a team culture of coaching and feedback

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    16 Apr 2026

    Green claims in focus

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    20 Apr 2026

    Skills for Future Facing Teams: The Emotionally Intelligent Leader

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    21 Apr 2026

    On the Pulse webinar series 2026 - Spring/Summer

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    Future of Renewables Spring Seminars

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    22 Apr 2026

    Sustainable Buildings: Taking the Temperature in 2026

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    23 Apr 2026

    ESG: Breaking Down the Buzzword

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    28 Apr 2026

    Strategic expansion to India: A new chapter for UK higher education

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    28 Apr 2026

    IP Insights webinar series 2026

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    29 Apr 2026

    CMS Update Morning: Media, Sports and Entertainment

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    02 May 2026

    CMS at INTA 2026

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    05 May 2026

    Joint seminar with CMS and Tannenbaum Helpern - A global perspective on securing, maintaining, and enforcing...

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    05 May 2026

    Cross-Border Financial Services 2026 webinar series

  • United Kingdom
    07 May 2026

    A new era? The Employment Rights Act 2025 and AI in employment disputes

Local market knowledge. Global outlook

We provide future-facing legal advice to help your organisation thrive. Combining local market knowledge and a global perspective, and with lawyers in locations worldwide, your organisation benefits from the expertise it needs, even across borders.

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