People
John Carroll is a partner in King & Spalding’s Antitrust & Competition Practice Group in the Washington, D.C. office. For over two decades, John’s practice has focused on civil and criminal antitrust matters, including mergers & acquisitions, strategic counseling and compliance, and global cartel investigations. He represents clients before the Federal Trade Commission, Department of Justice, Antitrust Division, and international and state antitrust enforcement authorities.
Prior to private practice, John was in the Mergers I Division of the Federal Trade Commission’s Bureau of Competition for several years. While with the FTC, he investigated, challenged, and negotiated settlements in a number of potentially anti-competitive business combinations in the aerospace, technology, consumer products, defense, healthcare, and pharmaceutical industries. He received an Award for Meritorious Service for work on merger litigation.
John has been recognized by leading publications such as Legal 500 and Best Lawyers and has held leadership positions in the American Bar Association and American Health Lawyer Association. He frequently speaks and writes on antitrust issues across industries.
J.D., George Washington University
B.A., University of Michigan
District of Columbia
Maryland
Supreme Court of the United States
ABA Antitrust Section, Vice-Chair of the Media & Technologies Committee (2021-2022, 2022-2023)
January 9, 2026
John Carroll discusses 2025's biggest antitrust developments and what attorneys should expect in 2026
January 5, 2026
Quantum Capital Group to Sell Cogentrix Energy to Vistra Corp. (NYSE: VST) for $4.7 Billion
November 17, 2025
Antitrust Partner John Carroll Returns to King & Spalding in Washington, D.C.
Healthcare & Life Sciences
Served as lead antitrust counsel for health systems on dozens of transactions that cleared federal and state antitrust reviews.
Led antitrust efforts for VillageMD in achieving antitrust clearance for its $8.9 billion acquisition of Summit Health.
Successfully represented clinically and financially integrated provider networks in nonpublic government investigations.
See more
January 15, 2026
FTC Announces 2026 Jurisdictional Threshold Updates for Interlocking Directorates and HSR Filing Thresholds
January 9, 2026
John Carroll discusses 2025's biggest antitrust developments and what attorneys should expect in 2026
January 5, 2026
Quantum Capital Group to Sell Cogentrix Energy to Vistra Corp. (NYSE: VST) for $4.7 Billion
November 17, 2025
Antitrust Partner John Carroll Returns to King & Spalding in Washington, D.C.
Healthcare & Life Sciences
Served as lead antitrust counsel for health systems on dozens of transactions that cleared federal and state antitrust reviews.
Led antitrust efforts for VillageMD in achieving antitrust clearance for its $8.9 billion acquisition of Summit Health.
Successfully represented clinically and financially integrated provider networks in nonpublic government investigations.
See more
January 15, 2026
FTC Announces 2026 Jurisdictional Threshold Updates for Interlocking Directorates and HSR Filing Thresholds
January 9, 2026
John Carroll discusses 2025's biggest antitrust developments and what attorneys should expect in 2026
January 5, 2026
Quantum Capital Group to Sell Cogentrix Energy to Vistra Corp. (NYSE: VST) for $4.7 Billion
November 17, 2025
Antitrust Partner John Carroll Returns to King & Spalding in Washington, D.C.
J.D., George Washington University
B.A., University of Michigan
District of Columbia
Maryland
Supreme Court of the United States
ABA Antitrust Section, Vice-Chair of the Media & Technologies Committee (2021-2022, 2022-2023)