Adam Di Vincenzo

Primary Focus & Experience

Mr. Di Vincenzo’s antitrust and competition law practice focuses on representing clients in government reviews of mergers and acquisitions, antitrust investigations, and antitrust litigation.

He has served as lead antitrust counsel for Fortune 500 public companies, and private equity sponsors and their portfolio companies, in dozens of antitrust matters before enforcement authorities in the United States (including the DOJ and FTC) and internationally. He has represented and counseled clients on a range of significant antitrust M&A matters and antitrust investigations, including AT&T’s acquisition of Time Warner (where the parties defeated a DOJ challenge after a preliminary injunction trial), Williams’ merger with Energy Transfer, and Roche’s acquisition of Spark Therapeutics. His other notable representations include Berkshire Hathaway Energy, Walmart, SLB, Kimberly-Clark, Southern Company, United Therapeutics, and Intel.   

Mr. Di Vincenzo also has extensive experience defending clients in antitrust litigation, and counsels clients on regulatory and compliance issues arising under the Sherman Act, the Clayton Act, the Robinson-Patman Act, and the Hart-Scott-Rodino (HSR) Act. His clients encompass a range of industries, including energy, defense, tech, advertising, insurance, retail, gaming, aviation, chemicals, consulting, entertainment, pharmaceuticals, medical devices, manufacturing, transportation, media, telecommunications, software, semiconductors, agriculture, wood products and consumer products.

Recognition & Accomplishments

Mr. Di Vincenzo is widely recognized as a leading antitrust lawyer by publications such as Global Competition Review, Legal 500, Benchmark Litigation, Who’s Who Legal, BTI Consulting, Law360, and Lawdragon. In 2025, Mr. Di Vincenzo was featured in the inaugural 2025 Lawdragon 500 Leading Global Antitrust & Competition Lawyers guide. In 2024, he was recognized by Legal 500 as a Next Generation Partner in Antitrust: Merger Control and Leading Lawyer in Antitrust: Cartel. In 2022, 2023, and 2024, he was recognized in Lawdragon's 500 Leading Litigators in America and as a Future Star by Benchmark Litigation. In 2023, BTI Consulting named Mr. Di Vincenzo a "Client Service All-Star," which recognizes “attorneys’ top legal decision-makers say deliver the absolute best client service.” One client noted that Mr. Di Vincenzo “grasps the nuances and is extremely polished . . . and I can easily put him in front of my Board of Directors.” (BTI Consulting). Another client described him as an “outstanding lawyer” who is “bright, organized, experienced, calm, and strategic.” (Legal 500).

He currently serves as a Senior Editor of the American Bar Association’ Antitrust Law Journal and was a principal editor of "Antitrust Laws & Trade Regulation: Desk Edition" (published by LexisNexis). He recently served as Co-chair of the ABA’s workshop on the 2023 US DOJ and FTC Merger Guidelines, and he has published several articles and symposia exploring topics such as merger analysis, risk allocation in M&A agreements, and intellectual property issues.