Law is a big service-based business. Business, finance, taxation, litigation, corporate affairs, conflicts, patents, copyrights, antitrust, property, labor, arbitration, as well as administration, political, and social matters all require law expertise. While there are other criteria to rank law firms—such as revenue per partner or lawyer, the number of lawyers, or year-over-year percent growth—annual revenue remains the most accurate, consistent, and easy to follow.

Here's a list of the top ten law firms in the world. All figures have been compiled from The American Lawyer's Global 200 ranked as of September 2020 and represent the fiscal year 2019.

Key Takeaways

  • Revenues for the top three firms—Kirkland & Ellis, Latham & Watkins, and DLA Piper—each exceeded $3 billion for the 2019 fiscal year.
  • Kirkland & Ellis came out on top with $4.15 billion in revenue while Hogan Lovells rounded out the list at number ten with $2.25 billion.
  • Nine of the firms have a headquarters based in the U.S., with only one of them—Clifford Chance—having its headquarters overseas.

1. Kirkland & Ellis LLP

Kirkland & Ellis LLP serves a niche set of corporate clients across the corporate, taxation, litigation, intellectual property, and restructuring fields. With approximately 2,000 lawyers on board, the U.S.-based firm's revenues stood at $4.15 billion in 2019, putting it at the top of the list. The firm has a number of high-profile clients including Boeing, Delta Airlines, Nike, and Verizon.

Kirkland & Ellis was founded in 1909 in Chicago.

2. Latham & Watkins LLP

Headquartered in Los Angeles with offices in 14 countries and more than 2,400 lawyers on board, Latham & Watkins ranks second in terms of annual revenues, with a reported $3.77 billion. The firm has a wide range of services from activism, to entertainment and media, to real estate, and white-collar defense.

3. DLA Piper

One of the biggest global law firms with lawyers in more than 40 countries, DLA Piper came into existence after a mega-merger of multiple international law firms in 2005.

Headquartered in London and Chicago, this firm came in third with annual revenues at $3.11 billion. It employs nearly 4,000 lawyers throughout its offices, with practice areas in sectors such as education, government contracting, insurance, and technology.

DLA Piper agreed to represent Paul Ceglia in 2010 in a lawsuit against Mark Zuckerberg, in which he claimed 84% ownership of Facebook.

4. Baker McKenzie

Founded in 1949 and headquartered in Chicago, Baker & McKenzie employs more than 13,000 people across 47 different countries. Its reported revenues were $2.92 billion, making it the fourth highest on the list.

5. Dentons

Dentons is the product of a flurry of mergers in the last half decade—the most recent being a double-merger in 2020 with Cohen & Grigsby and Bingham Greenebaum Doll.

The firm boasts more than 10,000 lawyers in more than 70 countries. Dentons ranked number five on the list with an annual revenue of $2.9 billion.

6. Skadden, Arps, Slate, Meagher & Flom LLP

Skadden—as the firm is commonly known—was founded in 1948. With headquarters in New York, Skadden has 22 offices across the globe with an employee roster of more than 1,700 lawyers, and more than 50 practice areas.

Its reported annual revenues were $2.63 billion. The firm advises businesses, financial institutions, and government agencies worldwide.

7. Sidley Austin

Founded in 1866, Sidley—as it's more commonly known—is headquartered in Chicago. It reported revenues of $2.34 billion and over 1,900 lawyers in 20 offices around the world.

The firm focuses on corporate and finance, employment, regulatory and government affairs, and tax law.

8. Clifford Chance LLP

Founded in 1987 through a merger, Clifford Chance is headquartered in London and with 29 offices. Its roster includes approximately 2,400 lawyers.

According to the company's website, primary sectors include banks, healthcare, private equity, and transport and logistics. Its reported revenues were $2.3 billion.

9. Morgan Lewis

Morgan Lewis employs 2,200 lawyers and was founded in 1873. The firm reported 2.27 billion in revenue—putting it in ninth place. The firm's headquartered in Philadelphia, with a total of 31 offices around the world.

10. Hogan Lovells

Hogan Lovells was formed as a result of a merger between Lovells LLP and Hogan & Hartson in 2010. The firm currently has more than 2,600 lawyers on its roster and reported $2.25 billion in revenue—putting it in tenth place.

The firm's main offices are in London and Washington, with a total of 49 offices around the world.

The Bottom Line

Law firms can have multiple practice areas, and for the world's top firms, expertise is required at both the local and global levels. The law firms listed above are successfully running their business across multiple practice areas, and have been effective in managing billion-dollar revenues consistently.