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10 Cleary Gottlieb Steen & Hamilton

Cleary Gottlieb Steen & Hamilton has a long-running commitment to excellence as testified by our research. In its most recent promotion round the firm elected seven partners and seven counsel effective 1 January 2016. According to managing partner Mark Leddy, the “new class of partners and counsel reflects the internationalism that has always been at the core of our firm and underscores our commitment to all the regions and markets in which we operate.” With its focus on delivering the highest quality legal service to its clients worldwide, Cleary Gottlieb is poised for continued success. 

Total Listings 90
No. Partners 191
Firm Size 1,200
Home Jurisdiction US
Established 1949
No. Offices 16
  • Belgium


Cleary’s Gottlieb’s antitrust/competition practice sets the benchmark for work in this field and is “world-class”. The firm’s practice is particularly strong in Washington, DC and Brussels, where some of the world’s leading practitioners in the field are located.

In Brussels, Nicholas Levy is an “internationally revered” practitioner focusing on EU and UK antitrust law. Antoine Winckler has experience in European and French competition law including cartel investigations, merger control and market dominance. Maurits Dolmans is another “prominent” lawyer with particular expertise in the telecoms and energy fields, while Francisco-Enrique González Diaz “expertly handles” cases involving European and Spanish competition law. On the US side, managing partner Mark Leddy is “top notch” and regularly appears before antitrust regulatory agencies.

Cleary Gottlieb has a stellar team of capital markets lawyers and has recently advised American Tower in its $1.25 billion notes offering and Korea in its 3 billion renminbi bond offering, the first panda bond offering by a sovereign. Key names include Gabriele Apfelbacher and Manuel Metzner in Frankfurt. Apfelbacher has “vast experience” in debt and equity matters and capital markets regulation, as does Metzner, a “distinguished practitioner”. Leslie Silverman in New York represents issuers and underwriters in cross-border offerings and the development of new financial products. He is a “technically gifted lawyer”.

On the corporate side, the firm is home to leading individuals in the M&A and corporate governance fields. Cleary Gottlieb has been involved in some of the largest deals in the market in 2015 including representing Allergan in its $160 billion combination with Pfizer, and SABMiller in its $108 billion merger with InBev. In New York, Victor Lewkow focuses on public and private merger and acquisition transactions and also advises corporations and their boards on governance issues. He provides “detailed and commercially astute advice”. Paul Shim is a “very active player” in the market who is currently advising Allergan on the above transaction. He is a “market leader” according to peers. London-based Simon Jay is “extremely popular with clients” due to his “strong negotiation skills” and “ability to get deals done”. 


Cleary Gottlieb lawyers have shown dedication to improving the community and helping people through pro bono counsel throughout the firm’s history, and today, is no exception with the lawyers dedicating more than 90,000 hours worldwide to pro bono and public service efforts annually. Cleary Gottlieb recently won a sanctions motion for violation of the automatic stay on behalf of a pro bono client, a pastor and Chapter 13 debtor, as a result of his eviction from a building where his church was located. Another highlight for the practice was its landmark victory in conversion therapy litigation, alongside its co-counsel the Southern Poverty Law Center and Lite DePalma Greenberg. The victory on behalf of plaintiffs was a first-of-its-kind consumer fraud lawsuit. 


The firm’s commitment to diversity and inclusion is reflected in its mission to attract, retain and advance a diverse group of lawyers. There are a multitude of events and initiatives on offer at the firm, including the Women’s Working Group, outreach to law students, high school programmes and summer internships and pipeline initiatives focusing on introducing minority students to life as a lawyer. 

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Law Business Research Ltd

87 Lancaster Road, London
W11 1QQ, UK