Joseph Aronsohn is a trial lawyer who represents Fortune 500 companies, leading technology and energy companies, and prominent individuals in high-profile disputes, government enforcement actions, and mass tort litigation. Clients turn to him for creative and forceful advocacy in closely watched matters, and he runs the day-to-day litigation of cases with hundreds of millions of dollars at stake.
Mr. Aronsohn’s experience runs from the pleadings through verdict. He was a core member of the trial team that defended Amazon in the Federal Trade Commission’s historic trial over its Prime membership, and he helped secure a complete defense verdict of non-infringement and invalidity in a Delaware patent trial. He has prepared multiple nine-figure matters through the eve of trial, and he regularly argues dispositive and discovery motions in state and federal court.
Prior to joining Hueston Hennigan, Mr. Aronsohn was an associate at Boies Schiller Flexner LLP in New York, where he litigated securities fraud, antitrust, contract, and fiduciary duty cases on both the plaintiff and defense side. He clerked for the Hon. Rebecca R. Pallmeyer of the U.S. District Court for the Northern District of Illinois.
Mr. Aronsohn received his J.D. from Stanford Law School, where he served as associate managing editor of the Stanford Law Review, earned the Gerald Gunther Prize for Outstanding Performance in Federal Courts, and graduated with high pro bono distinction. He interned in the United States Attorney’s Office for the Southern District of New York and the Civil Fraud Section of the United States Department of Justice.
Experience
Successfully defended Amazon.com and three Amazon executives against a historic FTC lawsuit targeting its Prime membership. Described as “a win for Amazon,” the case settled after three days of trial with no admissions of liability. (See “Why Amazon actually got off easy despite ‘historic’ $2.5 billion Prime deceptive practices settlement,” Fortune; “Why $2.5B Might Not Be Enough In FTC’s Amazon Settlement,” Law360).
Won complete defense verdict of no infringement and invalidity representing ClearOne Inc. as trial counsel in the District of Delaware in a case involving design patent for beamforming microphone arrays against Shure Incorporated. (See “Jury Says Microphone Co. Shure’s Patent Invalid After Trial,” Law360; “ClearOne Beats Rival Microphone Maker’s Design Patent Claims,” Bloomberg Law).
Won dismissal of a first-of-its-kind antitrust lawsuit brought by the Michigan Attorney General against ExxonMobil and other major oil companies, which alleged that the defendants conspired to suppress competition from renewable energy and electric vehicles. The court held that the state lacked antitrust standing to bring its claims. (See “Judge Dismisses Unusual Climate Suit Claiming Oil Giants Broke Antitrust Law,” New York Times; “Oil Cos. Escape Mich. Climate Change Antitrust Suit,” Law360).
Obtained a favorable settlement, less than a month before trial, for the country’s largest integrated health care system in a lawsuit brought by a group of California hospitals, alleging systematic underpayment for emergency services provided to its members. Plaintiffs sought hundreds of millions in damages.
Representing the major record labels, including UMG Recordings, Warner Music Group and Sony Music Entertainment, in high-profile and high-stakes copyright litigation against two leading generative AI music companies, Suno and Udio. The lawsuits are the first time the record labels have sued AI companies over sound recording copyrights (see “AI Cos. Hit With Copyright Claims From Music Labels,” Law360; “Major record labels sue AI company behind ‘BBL Drizzy,’” The Verge; “Music Labels Take On AI Startups With New Lawsuits,” The Wall Street Journal; “AI’s Most Ambitious Music Generators Accused of ‘Massive’ Infringement In New Lawsuit,” Rolling Stone).
Representing PubMatic, Inc. in a landmark antitrust lawsuit against Google over abuses of monopoly power in the digital advertising industry. (See “Google Sued by Advertising Exchange Over Monopoly Violations,” Bloomberg).
Defending Southern California Edison in high-profile coordinated litigation brought by thousands of plaintiffs arising from the January 2025 Palisades Fire in Los Angeles.
Representing one of the largest privately held real estate companies in the country and its chairman in litigation brought by plaintiffs claiming fraudulent transfer in connection with a $30 million real estate transaction.
Representing a leading online professional services platform in a Federal Trade Commission enforcement action alleging deceptive subscription-enrollment practices and violations of the FTC Act and the Restore Online Shoppers’ Confidence Act.
Represented Medtronic in a nine-figure patent infringement lawsuit concerning medical device technology. The case resolved on the eve of trial.
Successfully settled a suit brought by Palantir Technologies against a former early investor alleging breach of contract, misappropriation of trade secrets, and other wrongful conduct after defeating a motion for summary judgment.
Secured a favorable settlement on the eve of trial for a leading international law firm in an action alleging fraud in connection with a third party’s film-financing scheme.
Successfully settled a breach of contract and fraud case with claimed damages in excess of $75 million on behalf of a private equity fund.
Represented the co-founder of a dental alignment start-up company in a dispute over the proceeds from the company’s billion-dollar sale.
Represented biotech firm Sorrento Therapeutics in an arbitration involving breach of contract and tort claims relating to exclusive license agreements for monoclonal antibodies.
Represented an international sportswear company in connection with a third party’s criminal prosecution for extortion and fraud.
Represented an international ride-sharing company defending a federal antitrust action.
Represented an asset manager in a shareholder dispute involving a multinational telecommunications corporation.
Represented, pro bono, an individual appealing a nine-year sentence for first-degree robbery.
Recognitions
- Best Lawyers: Ones to Watch in America (2024-2027)