Kieran Gostin

Kieran Gostin consistently achieves successful results for clients in complex litigation and high-stakes trials.

Kieran has represented clients in several significant antitrust matters. He was a member of the trial team that secured a groundbreaking victory for Microsoft, defeating the FTC’s efforts to enjoin its $68.7 billion acquisition of Activision Blizzard and winning the second-biggest merger trial in American history. Kieran is also currently serving as co-lead counsel for Visa in connection with an action brought by the DOJ alleging that Visa has illegally monopolized the debit industry. For these and other representations, Chambers and Partners has recognized Kieran as an “Up and Coming” antitrust attorney.

Kieran has also represented clients in major consumer class actions and products liability trials. Among his many trial victories was the first jury verdict for Bayer in its nationwide Roundup litigation. Kieran was also a member of the trial team that delivered a complete defense verdict for Bayer in a multi-state class action arising from challenges to the company’s product advertising and labeling of its One A Day multivitamins.

Kieran has received “Rising Star” awards from the National Law Journal and Law360, and a “Future Star” award from Benchmark Litigation. Lawdragon has named him to its “500 Leading Litigators in America” list and he is recommended by Legal 500 for “Sports.”

Before joining the firm, Kieran was a trial attorney in the Federal Programs Branch of the U.S. Department of Justice, where he was the lead attorney in matters challenging the legality of executive agency action, including cases involving challenges to federal healthcare and national security programs.