David Ko

He has helped his clients-including government entities, retirement plans, institutional investors, and consumers-obtain multimillion-dollar recoveries against some of the largest corporations in the country. He has significant trial experience, having tried months-long trials in both federal and state court.

David has been at the center of the firm’s largest and most high-profile cases. He represents government entities all over the country in In re National Prescription Opiate Litigation, MDL 2804 (N.D. Ohio) -seeking to hold manufacturers, distributors, and dispensers responsible for creating and fueling the opioid epidemic-which has resulted in over $50 billion in settlements to date. He was also one of the primary attorneys in In re Facebook, Inc. Consumer Privacy User Profile Litigation, MDL 2843 (N.D. Cal.), a class action alleging Facebook discloses user information and data without consent that recently resolved for $725 million, the largest settlement to date of a U.S. privacy class action and the most Facebook has ever paid to resolve private litigation. David also helped lead the firm’s efforts in In re JUUL Labs, Inc. Marketing, Sales Practices, & Products Liability Litigation , MDL 2913 (N.D. Cal.), which resulted in nearly $2 billion in settlements from JUUL and Altria for their role in the youth vaping epidemic.

David served in a variety of prominent positions and committees in these MDLs, and continues to serve in leadership roles in complex MDLs against the pharmaceutical industry including against Pharmacy Benefit Managers. He currently serves as Co-Lead Counsel on behalf of a class of independent pharmacies in In re GoodRx and Pharmacy Benefit Manager Antitrust Litigation (No. II), MDL 3148 (D.R.I.), and on the Plaintiffs’ Executive Committee on behalf of self-funded plans in In re Insulin Pricing Litigation, MDL 3080 (D.N.J.).

Prior to joining the firm, David clerked for the Honorable Ricardo S. Martinez, U.S. District Judge in the Western District of Washington. He is past President of the Korean American Bar Association of Washington, and a fellow of the Washington Leadership Institute. While born in Seoul and extremely proud of his Korean heritage, David has spent most of his life in the Seattle area, where he currently lives with his wife and two young daughters and is an avid supporter of all Seattle sports teams.

Articles & Presentations

•Speaker, Ethics in Class Actions, AAJ 2025 Annual Convention, San Francisco, CA (July 2025)
•Speaker, From Conflict to Cost-Savings: How Mediation Can Make eDiscovery More Efficient (July 2024).
•Speaker, Opioid Litigation, Washington Association of Prosecuting Attorneys Summer Training Program, Chelan, WA (June 2023).
•Speaker, Opioid Litigation Settlement Updates, Washington County Administration Association Annual Conference (April 2023).
•Speaker, Opioid Litigation, Washington Association of Prosecuting Attorneys Spring Training Program, Tacoma, WA (April 2023).
•Speaker, Opioid Abuse and Litigation: Legal and Policy Responses, Human Right to Health: Pathways and Responses, Seattle, WA (November 2019)
•Speaker, Opioid Litigation on Behalf of Local Governments, Washington State Society of Healthcare Attorneys Annual Conference, Seattle, WA (April 2018).
•Speaker, National Costs of Opioid Crisis, Mass Torts Made Perfect, Las Vegas, NV (April 2018).
•Speaker, Fundamentals of the Repurchase Obligation, National Center for Employee Ownership Annual Conference, Denver, CO (March 2017).
•Speaker, Legal Ethics: Top Attorney-Client Mistakes, National Business Institute, Seattle, WA (December 2016).
•Speaker, Title Law: Ethics, National Business Institute, Seattle, WA (April 2016).

Recognitions

Honors & Awards

•Lawdragon, 500 Leading Plaintiff Financial Lawyers, 2023-2025
•Selected to Super Lawyers list in Super Lawyers - Washington, 2022-2025
•Selected to Rising Stars list in Super Lawyers - Washington, 2019-2020
•National Trial Lawyers: Top 100 Civil Plaintiff Trial Lawyers in Washington, 2020-present