Benchmark Litigation is part of Legal Benchmarking Limited, 1-2 Paris Garden, London, SE1 8ND

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Key contacts
Managing Partner: Anjan Sahni
Chair, Litigation/Controversy Department: Ronald Machen
Quick facts
Partners

271

Other qualified practitioners

949

Total number of lawyers

1220

Practitioners (worldwide)

1220

Key practice areas
PTAB litigation
Life sciences IP
Intellectual property
ITC litigation
Patent disputes
Trade mark
Patent
Patent prosecution
IP transactions
IP transactions
Bankruptcy
Intellectual property
Dispute resolution
International arbitration
White collar crime
Competition/antitrust
Appellate
Commercial
Firm overview

WilmerHale is a leading, full-service international law firm with more than 1,200 lawyers located throughout 12 offices in the United States and Europe. The firm's lawyers work at the intersection of government, technology and business, and are committed to guiding principles of:

  • providing quality, world-class legal and client services;
  • promoting a culture of opportunity and inclusiveness;
  • fostering an environment that promotes an entrepreneurial spirit, collaboration and collegiality by drawing on the exceptional talents and varied experience of our lawyers;
  • encouraging lawyers and staff to perform public service and give back to the community through pro bono work, government service, service to the bar, teaching, and supporting public institutions and charitable organizations; and
  • hiring and retaining exceptionally talented lawyers who possess the common trait of outstanding academic and personal achievements.

Litigation:

Our lawyers have played an integral role in many of the most significant cases across the globe over the past several years, including internal and governmental investigations; patent, copyright and trademark cases; regulatory, government and public policy disputes; securities class action lawsuits; and federal and state appellate cases. Clients rely on our strong understanding of their industries and business goals, pragmatic and clear advice—even in the midst of complicated issues, complex legal and regulatory regimes, and high-stakes decisions—and ability to deliver practical solutions to real-world problems. Our cases and achievements cut across the litigation spectrum, and we have experience across industries, including aviation; bankruptcy and commercial; communications; defense and national security; government contracts; energy, environment and natural resources; financial institutions; labor and employment; technology; and trade. Learn more about our litigation practices at https://www.wilmerhale.com/en/solutions/litigation

Address:
2100 Pennsylvania Avenue NW
Washington DC, 20036
Tel:+1 202 663 6000 Email:Contact Us Web Address:https://www.wilmerhale.com/en
Rankings published in 2025
Appellate
Tier 1
21 firms ranked
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Tier 1

Gibson Dunn & Crutcher
18 practice areas
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Herbert Smith Freehills Kramer
12 practice areas
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Hogan Lovells Cadwalader
11 practice areas
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Kellogg Hansen Todd Figel & Frederick
5 practice areas
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Kirkland & Ellis
22 practice areas
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Latham & Watkins
18 practice areas
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Mayer Brown
18 practice areas
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Paul Weiss Rifkind Wharton & Garrison
17 practice areas
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Sidley Austin
23 practice areas
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Weil Gotshal & Manges
20 practice areas
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Williams & Connolly
14 practice areas
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WilmerHale
18 practice areas
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Tier 2

Covington & Burling
17 practice areas
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Goodwin Procter
12 practice areas
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Jones Day
18 practice areas
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Milbank
12 practice areas
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Morrison Foerster
14 practice areas
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Orrick Herrington & Sutcliffe
15 practice areas
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Proskauer
19 practice areas
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Quinn Emanuel Urquhart & Sullivan
21 practice areas
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Vinson & Elkins
4 practice areas
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Bankruptcy
Tier 2
21 firms ranked
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Tier 1

Akin Gump Strauss Hauer & Feld
5 practice areas
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Brown Rudnick
2 practice areas
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Cleary Gottlieb Steen & Hamilton
8 practice areas
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Herbert Smith Freehills Kramer
12 practice areas
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Jones Day
18 practice areas
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Milbank
12 practice areas
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Paul Weiss Rifkind Wharton & Garrison
17 practice areas
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Proskauer
19 practice areas
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Quinn Emanuel Urquhart & Sullivan
21 practice areas
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Sidley Austin
23 practice areas
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Skadden Arps Slate Meagher & Flom
13 practice areas
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Sullivan & Cromwell
15 practice areas
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Wachtell Lipton Rosen & Katz
6 practice areas
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Weil Gotshal & Manges
20 practice areas
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White & Case
9 practice areas
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Tier 2

Davis Polk & Wardwell
8 practice areas
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Kasowitz LLP
7 practice areas
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Kirkland & Ellis
22 practice areas
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Ropes & Gray
12 practice areas
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Simpson Thacher & Bartlett
8 practice areas
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WilmerHale
18 practice areas
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Commercial
Tier 2
38 firms ranked
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Tier 1

Bartlit Beck
13 practice areas
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Cleary Gottlieb Steen & Hamilton
8 practice areas
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Cravath Swaine Moore
7 practice areas
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Davis Polk & Wardwell
8 practice areas
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Debevoise & Plimpton
15 practice areas
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Gibson Dunn & Crutcher
18 practice areas
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Holwell Shuster & Goldberg
5 practice areas
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Hueston Hennigan
7 practice areas
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Kellogg Hansen Todd Figel & Frederick
5 practice areas
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King & Spalding
14 practice areas
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Kirkland & Ellis
22 practice areas
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Latham & Watkins
18 practice areas
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Paul Weiss Rifkind Wharton & Garrison
17 practice areas
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Quinn Emanuel Urquhart & Sullivan
21 practice areas
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Simpson Thacher & Bartlett
8 practice areas
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Sullivan & Cromwell
15 practice areas
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Susman Godfrey
8 practice areas
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Wachtell Lipton Rosen & Katz
6 practice areas
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Weil Gotshal & Manges
20 practice areas
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Wilkinson Stekloff
5 practice areas
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Williams & Connolly
14 practice areas
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Winston Taylor
15 practice areas
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Tier 2

A&O Shearman
6 practice areas
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Covington & Burling
17 practice areas
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Freshfields US LLP
4 practice areas
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Kasowitz LLP
7 practice areas
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Kobre & Kim
4 practice areas
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McKool Smith
10 practice areas
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Milbank
12 practice areas
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Mintz Levin Cohn Ferris Glovsky & Popeo
12 practice areas
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O'Melveny & Myers
12 practice areas
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Patterson Belknap Webb & Tyler
7 practice areas
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Polsinelli
8 practice areas
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Proskauer
19 practice areas
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Robins Kaplan
9 practice areas
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Sidley Austin
23 practice areas
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White & Case
9 practice areas
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WilmerHale
18 practice areas
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Competition/antitrust
Tier 1
43 firms ranked
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Tier 1

A&O Shearman
6 practice areas
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Arnold & Porter
19 practice areas
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Bartlit Beck
13 practice areas
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Cleary Gottlieb Steen & Hamilton
8 practice areas
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Covington & Burling
17 practice areas
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Cravath Swaine Moore
7 practice areas
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Davis Polk & Wardwell
8 practice areas
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Gibson Dunn & Crutcher
18 practice areas
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Kirkland & Ellis
22 practice areas
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Latham & Watkins
18 practice areas
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Patterson Belknap Webb & Tyler
7 practice areas
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Paul Weiss Rifkind Wharton & Garrison
17 practice areas
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Proskauer
19 practice areas
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Quinn Emanuel Urquhart & Sullivan
21 practice areas
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Sidley Austin
23 practice areas
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Simpson Thacher & Bartlett
8 practice areas
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Skadden Arps Slate Meagher & Flom
13 practice areas
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Sullivan & Cromwell
15 practice areas
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Susman Godfrey
8 practice areas
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Weil Gotshal & Manges
20 practice areas
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White & Case
9 practice areas
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Wilkinson Stekloff
5 practice areas
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Williams & Connolly
14 practice areas
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WilmerHale
18 practice areas
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Winston Taylor
15 practice areas
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Tier 2

Cahill Gordon & Reindel
6 practice areas
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Debevoise & Plimpton
15 practice areas
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Dechert
9 practice areas
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DiCello Levitt
3 practice areas
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Dunn Isaacson Rhee
6 practice areas
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Eimer Stahl
2 practice areas
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Hausfeld
2 practice areas
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Hogan Lovells Cadwalader
11 practice areas
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Jones Day
18 practice areas
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Joseph Saveri Law Firm
3 practice areas
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Kasowitz LLP
7 practice areas
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Lieff Cabraser Heimann & Bernstein
5 practice areas
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Mayer Brown
18 practice areas
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Milbank
12 practice areas
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Morgan Lewis & Bockius
12 practice areas
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O'Melveny & Myers
12 practice areas
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Robins Kaplan
9 practice areas
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Rule Garza Howley
2 practice areas
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Intellectual property
Tier 1
43 firms ranked
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Tier 1

Arnold & Porter
19 practice areas
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Debevoise & Plimpton
15 practice areas
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Desmarais
7 practice areas
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Finnegan Henderson Farabow Garrett & Dunner
14 practice areas
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Fish & Richardson
12 practice areas
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Gibson Dunn & Crutcher
18 practice areas
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Groombridge Wu Baughman & Stone
7 practice areas
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Irell & Manella
9 practice areas
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Knobbe Martens
12 practice areas
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Latham & Watkins
18 practice areas
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McKool Smith
10 practice areas
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Milbank
12 practice areas
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Morrison Foerster
14 practice areas
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Paul Weiss Rifkind Wharton & Garrison
17 practice areas
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Quinn Emanuel Urquhart & Sullivan
21 practice areas
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Reichman Jorgensen Lehman & Feldberg
8 practice areas
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Sidley Austin
23 practice areas
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Williams & Connolly
14 practice areas
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WilmerHale
18 practice areas
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Tier 2

Axinn
2 practice areas
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Bunsow De Mory
3 practice areas
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Choate Hall & Stewart
10 practice areas
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Cooley
16 practice areas
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Covington & Burling
17 practice areas
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Cravath Swaine Moore
7 practice areas
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Davis Polk & Wardwell
8 practice areas
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Fenwick & West
13 practice areas
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Goodwin Procter
12 practice areas
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Greenberg Traurig
3 practice areas
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Keker Van Nest & Peters
10 practice areas
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Kilpatrick Townsend & Stockton
11 practice areas
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Kirkland & Ellis
22 practice areas
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Kobre & Kim
4 practice areas
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Orrick Herrington & Sutcliffe
15 practice areas
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Paul Hastings
8 practice areas
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Proskauer
19 practice areas
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Robins Kaplan
9 practice areas
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Rothwell Figg Ernst & Manbeck
10 practice areas
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Sheppard Mullin Richter & Hampton
5 practice areas
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Simpson Thacher & Bartlett
8 practice areas
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Venable
13 practice areas
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Weil Gotshal & Manges
20 practice areas
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White & Case
9 practice areas
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International arbitration
Tier 2
15 firms ranked
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Tier 1

Cleary Gottlieb Steen & Hamilton
8 practice areas
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Debevoise & Plimpton
15 practice areas
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Freshfields US LLP
4 practice areas
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King & Spalding
14 practice areas
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Sidley Austin
23 practice areas
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Skadden Arps Slate Meagher & Flom
13 practice areas
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White & Case
9 practice areas
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Tier 2

A&O Shearman
6 practice areas
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Chaffetz Lindsey
1 practice area
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Cooley
16 practice areas
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Covington & Burling
17 practice areas
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Dan Tan Law
1 practice area
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Sullivan & Cromwell
15 practice areas
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Wachtell Lipton Rosen & Katz
6 practice areas
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WilmerHale
18 practice areas
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White collar crime
Tier 1
46 firms ranked
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Tier 1

Cleary Gottlieb Steen & Hamilton
8 practice areas
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Covington & Burling
17 practice areas
View profile
Davis Polk & Wardwell
8 practice areas
View full profile
Debevoise & Plimpton
15 practice areas
View full profile
Dechert
9 practice areas
View profile
Gibson Dunn & Crutcher
18 practice areas
View full profile
Hueston Hennigan
7 practice areas
View full profile
Keker Van Nest & Peters
10 practice areas
View profile
King & Spalding
14 practice areas
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Kirkland & Ellis
22 practice areas
View profile
Latham & Watkins
18 practice areas
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Milbank
12 practice areas
View full profile
Morvillo Abramowitz Grand Iason & Anello
1 practice area
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Paul Weiss Rifkind Wharton & Garrison
17 practice areas
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Quinn Emanuel Urquhart & Sullivan
21 practice areas
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Simpson Thacher & Bartlett
8 practice areas
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Skadden Arps Slate Meagher & Flom
13 practice areas
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Sullivan & Cromwell
15 practice areas
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Williams & Connolly
14 practice areas
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WilmerHale
18 practice areas
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Tier 2

A&O Shearman
6 practice areas
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Arnold & Porter
19 practice areas
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Bird Marella LLP
5 practice areas
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Boies Schiller Flexner
5 practice areas
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Cahill Gordon & Reindel
6 practice areas
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Cohen & Gresser
2 practice areas
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Cravath Swaine Moore
7 practice areas
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Fried Frank Harris Shriver & Jacobson
3 practice areas
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Goodwin Procter
12 practice areas
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Harris St. Laurent
4 practice areas
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Hogan Lovells Cadwalader
11 practice areas
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Kobre & Kim
4 practice areas
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Lankler Siffert & Wohl
1 practice area
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Levine Lee
2 practice areas
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Mintz Levin Cohn Ferris Glovsky & Popeo
12 practice areas
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Morgan Lewis & Bockius
12 practice areas
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Patterson Belknap Webb & Tyler
7 practice areas
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Proskauer
19 practice areas
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Sidley Austin
23 practice areas
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Steptoe
5 practice areas
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Wachtell Lipton Rosen & Katz
6 practice areas
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Walden Macht Haran & Williams
2 practice areas
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White & Case
9 practice areas
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Willkie Farr & Gallagher
3 practice areas
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Winston Taylor
15 practice areas
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Zuckerman Spaeder
1 practice area
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Linked Reviews
Dispute Resolution

With a network of international and domestic offices, WilmerHale has built a reputation as a global powerhouse. Nationally, the firm’s original mainstay in Boston continues to secure near-unanimous recognition in litigation, and the New York, DC and California offices have further bolstered the firm’s top-tier standing. It is lauded for its litigation capabilities nationwide, particularly antitrust, white-collar, securities and appellate, as well as intellectual property, one of the firm’s most notable practices. The firm has also increasingly developed a name for itself in the international arbitration space as well. “Wilmer is one of the foundational groups in the business,” insists a peer. “A lot of this is through its London office but it is also really gathering strength in the US as well. Keep an eye on this.” Further amplifying the firm’s service offerings, WilmerHale litigators continue to demonstrate a keen prowess with trials, with several key courtroom wins on display from practitioners in several offices and across varied practice areas.
     In the firm’s famed IP practice, Boston-based but nationally recognized Bill Lee needs no introduction; he continues to be universally regarded as a celebrity of the patent litigation community. “I tried two Qualcomm cases against him,” testifies a former opponent. “Bill is quite senior but still very active and still very good.” While Lee made headlines as counsel for Apple in the “smartphone wars” litigation, the baton for that client has effectively been passed to another Boston-based patent trial star, Joseph Mueller, tipped by many peers to be Lee’s successor. Mueller triumphed for Apple in a billion-dollar dispute with an entity that was alleged that Apple wrongly acquired its trade secrets from a for pulse oximetry technology incorporated into the Apple Watch. The court decided for the client in a May 2023 decision, although a retrial is scheduled for November 2024. “Joe Mueller has the trial skills and IP know-how to get Bill Lee’s blessing for sure,” asserts a peer. In another high-profile patent win, DC’s Greg Lantier won a sweeping victory for Dropbox in the company’s first-ever trial in May 2023, when a federal jury found all patents not infringed and invalid in a complex patent-infringement case. 
     The firm’s unassailable IP roster is bookended on the West Coast by Sonal Mehta, one of the youngest and most championed stars of the Bay Area/Silicon Valley patent community. Mehta, who earned her stripes at celebrated (but now defunct) San Francisco litigation boutique Durie Tangri, has been lead counsel on several groundbreaking patent actions in the past several years and as of late has become a go-to for social-media juggernaut Meta – corporate parent of household names Facebook and Instagram – in several cases involving issues of antitrust, privacy and breach-of-contract, sometimes involving an intersection of any of these three. “Sonal’s practice is tailor made for the Bay Area trendy tech titans,” quips a peer. Mehta added another social media household name to her arsenal of clients with her defense of X (formerly Twitter) in a patent-infringement suit, valued at $600 million and brought by an entity that purchased patents related to online sharing of user-created videos, from a company that had originally filed a case. The initial claims allege that, following talks with X executives about partnering, X instead developed its own products that infringed.

     Beyond IP litigation, Wilmer boasts trial firepower in the securities and commercial space as well, with New York’s Hallie Levin being a frequent mention as a standout in these capacities. Levin is a fellow of the American College of Trial Lawyers and put her courtroom acuity on display when she led a team (which included Peter Neiman) that secured a victory for T-Mobile following a five-day bench trial in Delaware Chancery Court in August 2021. The Vice Chancellor granted T-Mobile’s request to enjoin Cox Communications from partnering with any mobile network operator other than T-Mobile to provide wholesale wireless services to Cox.

 

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