David Ko


1201 Third Avenue, Suite 3200
Seattle, Washington 98101 

P: 206.623.1900
F: 206.623.3384



David practices in the firm’s nationally recognized Complex Litigation Group where he represents government entities, retirement plans, institutional investors, ESOPs, and individuals in federal and state courts across the country. David focuses on cases involving breaches of fiduciary duty under ERISA, consumer protection violations, securities misrepresentations, and general corporate malfeasance. He has made substantial contributions to several multimillion dollar recoveries against some of the largest corporations in the country.

David has substantial trial experience in both federal and state court. He was part of the Steering Committee representing institutional investors—including the Federal Home Loan Banks of Chicago, Boston, and Indianapolis—objecting to a proposed $8.5 billion settlement presented by the Bank of New York Mellon in an effort to resolve Bank of America’s liability arising out of Countrywide’s issuance of mortgage-backed securities. The arguments raised by Keller Rohrback in an eight-week trial in New York Supreme Court were the only objections to the settlement sustained by the Court.

David also represented thousands of Super Bowl 49 ticket holders who purchased but did not receive their tickets as promised from various ticket brokers engaged in short-selling, including filing the first class action arising out of this widespread and deceptive practice.

Most recently, David has been appointed as a special deputy prosecuting attorney by numerous government entities as outside counsel in connection with opioid litigation against drug manufacturers and distributors of prescription opioids. David is one of the lead attorneys handling the firm’s opioid cases and represents counties, cities, and Native American Tribes in Washington, California, Arizona, and Idaho.

Prior to joining the firm, David clerked for the Honorable Ricardo S. Martinez, Chief U.S. District Judge in the Western District of Washington. David is also past President of the Korean American Bar Association of Washington, and a Fellow of the Washington Leadership Institute.

Bar and Court Admissions

2006, Washington
2010, U.S. District Court for the Western District of Washington
2010, U.S. District Court for North Dakota
2011, U.S. Court of Appeals for the Ninth Circuit
2016, U.S. District Court for the Eastern District of Michigan
2018, U.S. Court of Appeals for the Second Circuit
2018, U.S. District Court for the Eastern District of Washington



University of Washington – B.A., 2002, History and Political Science 

Seattle University School of Law – J.D., cum laude, 2006; National Order of the Barristers 

University of Washington School of Law – LL.M., 2007, Taxation

Professional and Civic Involvement

Washington State Bar Association, Member

King County Bar Association, Member

Korean American Bar Association, Board Member

Asian American Bar Association, Member

National Center for Employee Ownership, Member

Articles and Presentations

Speaker, Washington State Society of Healthcare Attorneys Annual Conference, Opioid Litigation on Behalf of Local Governments (Seattle, WA, 2018)

Speaker, Mass Torts Made Perfect, National Costs of Opioid Crisis (Las Vegas, NV, 2018)

Speaker, National Center for Employee Ownership Annual Conference, Fundamentals of the Repurchase Obligation (Denver, CO, 2017)

Speaker, National Business Institute, Legal Ethics: Top Attorney-Client Mistakes (Seattle, WA, 2016)

Speaker, National Business Institute, Title Law: Ethics (Seattle, WA, 2016)