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Who's Who Legal
Who's Who Legal

Global Leader

Competition 2021

Professional Biography

WWL Ranking: Recommended

Peers and clients say:

“He is a great practitioner”
“Harald is the clear number one guy”


Dr Harald Kahlenberg is a partner in CMS Hasche Sigle’s Stuttgart office. His practice focuses on EU and German competition law with special emphasis on merger control and cartel investigations. For more than 30 years, he has been representing German and international clients before the German Federal Cartel Office, the European Commission and German courts in a large number of merger notifications and competition law enforcement cases, and has obtained clearances on a wide range of transactions. He has vast experience in complex multi-jurisdictional merger filings for international transactions and has coordinated merger filings in more than 40 jurisdictions worldwide. Harald represents clients in complex cartel investigation and enforcement proceedings before the competition authorities and courts. He also advises clients on implementing competition compliance programmes. Recent mandates have focused on sectors such as machine tools, engineering, steel and scrap, drugstore chains, timber, print and new media, and distribution.

For almost 15 years, Harald was head of the global CMS competition practice group with more than 200 competition lawyers worldwide. He is co-chair of the antitrust and competition practice group of the World Law Group (WLG).

Harald is a sought-after speaker at national and international conferences. He is listed as a leading lawyer in competition law in all of the major rankings and directories.

The CMS competition practice group is one of the largest competition groups in the world.

Its more than 200 competition lawyers are based in 45 cities, including Algiers, Amsterdam, Beijing, Belgrade, Berlin, Bogota, Bratislava, Brussels, Bucharest, Budapest, Casablanca, Dusseldorf, Edinburgh, Frankfurt, Geneva, Hamburg, Istanbul, Kiev, Lima, Lisbon, Ljubljana, London, Lyon, Madrid, Mexico City, Milan, Mombasa, Moscow, Munich, Nairobi, Paris, Podgorica, Prague, Santiago de Chile, Sarajevo, Shanghai, Sheffield, Skopje, Sofia, Stuttgart, Tirana, Vienna, Warsaw, Zagreb and Zurich. The CMS organisation has over 5,000 lawyers and tax consultants in 77 offices in 43 countries worldwide.

National Leader

WWL Ranking: Recommended
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