Arnold & Porter

Arnold & Porter Kaye Scholer LLP, doing business as Arnold & Porter, is an American multinational law firm.^[2] It is a white-shoe firm^[3] and among the largest law firms in the world, both by revenue and by number of lawyers.^[4][5]

Arnold & Porter was founded in 1946 by Thurman Arnold and Abe Fortas, and was originally known as Arnold & Fortas. Paul Porter joined the firm a year later, becoming a name partner.

The original firm was founded as Arnold & Fortas in 1946 by New Deal veterans Thurman Arnold, a former Yale Law School professor and U.S. Court of Appeals judge on the D.C. Circuit, and Abe Fortas, another former Yale Law School professor who later became a Supreme Court justice.^[6] In 1947, Paul A. Porter, a former chairman of the Federal Communications Commission, joined the firm and it was renamed as Arnold, Fortas & Porter. In 1965, Abe Fortas' name was dropped from the firm's name, after his ascension to the Supreme Court, as is customary.^[7] Arnold & Porter later refused to re-admit its founder to the firm, following Fortis'^[8] 1969 resignation from the Supreme Court.^[9]

In November 2016, Arnold & Porter announced a merger with New York-based firm Kaye Scholer, forming Arnold & Porter Kaye Scholer LLP, with approximately 1,000 attorneys across 14 offices. The merger took effect on January 1, 2017.^[10] In July 2025, the firm announced the launch of a new office in Seattle, bringing its tally of U.S.- based offices to 11.^[11]

In February 2018, The National Law Journal reported that the newly combined "firm has quietly reversed its post-merger branding efforts" and "scrubbed nearly all mention of Kaye Scholer from its public image, changing its brand name, email addresses and web domain", while retaining the legal entity name in full.^[12] In September 2020, Arnold & Porter announced that it will shut down its Frankfurt office by the end of March 2021.^[13]

In 2022, Arnold & Porter was a founding member of the Legal Alliance for Reproductive Rights, a coalition of United States law firms offering free legal services to people seeking and providing abortions in the wake of Dobbs v. Jackson Women's Health Organization, which overruled Roe v. Wade.^[14]

In 2024, Arnold & Porter reported a 5% increase in revenue, reaching $1.19 billion. Profits per equity partner rose to $1.63 million, and revenue per lawyer increased by 6.5% to $1.24 million.^[15]

In 1963, Abe Fortas of Arnold, Fortas & Porter, was appointed by the Supreme Court to represent Clarence Gideon in the landmark case of Gideon v. Wainwright.^[16] Abe Krash and John Hart Ely worked with Fortas on Gideon. This led to the Supreme Court upholding the right to counsel in felony prosecutions and requiring states to provide counsel to defendants unable to afford their own.

The firm has represented BP in legal settlements over the Deepwater Horizon oil spill since 2010; General Electric in its $32 billion merger of GE Oil & Gas with Baker Hughes; AT&T in its $49 billion purchase of DIRECTV; and Pfizer in its $43 billion acquisition of Seagen.^[17]

Arnold & Porter represented OxyContin manufacturer Purdue Pharma in opioid epidemic litigation during the late 2010s.^[18][19]

Firm partner Axel Gutermuth represented AbbVie in its $63 billion purchase of Allergan.^[20]

In 2022, the firm was sanctioned and fined $150,000 by a Suffolk County, New York, court for discovery disclosure breaches in its representation of Endo Pharmaceuticals in opioid litigation.^[21]

In 2020, Arnold & Porter attorneys helped secure a $14 million judgment for 12 Black Lives Matter protesters who were victims of police brutality in Colorado.^[22] The matter took 18 months to settle and required 14,000-plus lawyer hours.^[23]

Attorneys with the firm assisted the family of Lt. Henry Ossian Flipper in obtaining the first posthumous presidential pardon in U.S. history, and represented Ukrainian mail order bride Nataliya Fox against international marriage broker Encounters International in a landmark case that helped to establish the rights of such women.^[24]

The firm is co-counsel with the DC Prisoners' Project of the Washington Lawyers' Committee for Civil Rights and Urban Affairs, which represents prisoners at ADX Florence who allege deficiencies in psychiatric evaluation and care in Cunningham v. Federal Bureau of Prisons.^[25]

• Amsterdam, the Netherlands
• Boston, Massachusetts
• Brussels, Belgium
• Chicago, Illinois
• Denver, Colorado
• London, United Kingdom
• Los Angeles, California
• Houston, Texas
• Newark, New Jersey
• New York, New York
• Palo Alto, California
• San Francisco, California
• Seattle, Washington
• Seoul, South Korea
• Shanghai, China
• Washington, D.C.

• Clifford Alexander - U.S. Secretary of the Army, chairman of the Equal Employment Opportunity Commission, and presidential advisor
• Thurman Arnold, founder — U.S. Court of Appeals Judge for the D.C. Circuit, Yale Law School Professor^[26]
• William Baer — United States Department of Justice Assistant Attorney General, Antitrust Division^[27]
• Naomi Biden — lawyer and granddaughter of U.S. President Joe Biden
• David Bonderman (born 1942) — businessman
• Brooksley Born — Chairwoman, U.S. Commodity Futures Trading Commission
• Joseph A. Califano — U.S. Secretary of Health, Education, and Welfare, Chairman of the National Center of Addiction and Substance Abuse
• Pamela Ki Mai Chen — United States District Judge of the United States District Court for the Eastern District of New York
• Eli Whitney Debevoise II — U.S. Executive Director of the World Bank
• Mary DeRosa — former Deputy Counsel to the President for National Security Affairs in the Obama administration
• Chris Dodd — former Democratic Senator, Connecticut^[28]
• Allison H. Eid — Judge of the United States Court of Appeals for the Tenth Circuit
• John Hart Ely — legal scholar and former dean of Stanford Law School
• Abe Fortas, founder — Supreme Court Justice, Yale Law School professor
• Merrick Garland — former Attorney General of the United States, former U.S. Court of Appeals Chief Judge for the D.C. Circuit, 2016 nominee to the Supreme Court to replace Antonin Scalia^[29]
• Sherilyn Peace Garnett — Judge of the United States District Court for the Central District of California
• Michael Gerrard — Columbia Law School professor, former partner in charge of the firm's New York City office
• Charles Halpern — Founder of the Center for Law and Social Policy, first Dean of City University of New York School of Law, Berkeley School of Law professor
• Kenneth I. Juster — Under Secretary of Commerce for Export Administration
• Timothy J. Kelly — Judge of the United States District Court for the District of Columbia
• Abe Krash – partner, legal scholar, contributor to Gideon v. Wainwright (1963), Georgetown Law professor
• David Lammy - U.K. Foreign Secretary worked for Howard Rice which was acquired by Arnold & Porter
• Irvin B. Nathan — Attorney General of the District of Columbia, General Counsel of the United States House of Representatives
• Matthew G. Olsen — Director of the National Counterterrorism Center and former General Counsel of the National Security Agency
• Paul A. Porter, founder — Chairman of the Federal Communications Commission
• Margaret M. Morrow — United States District Judge of the United States District Court for the Central District of California
• Jack Quinn — former Clinton White House counsel and founder of Quinn Gillespie & Associates
• Sarah Bloom Raskin — member of the Board of Governors of the Federal Reserve System
• Charles A. Reich — legal and social scholar
• William D. Rogers — President, American Society of International Law, Undersecretary of State for Economic Affairs, Assistant Secretary of State for Inter-American Affairs
• Jonathan Schiller — co-founder and managing partner, Boies Schiller Flexner LLP
• Dov Seidman — author, columnist and businessman

• Official website