Derek W. Loeser


1201 Third Avenue, Suite 3200 Seattle, Washington 98101 

P: 206.224.7562

F: 206.623.3384



Derek Loeser is a senior member of Keller Rohrback’s nationally recognized Complex Litigation Group and a member of the firm’s Executive Committee. He maintains a national practice prosecuting class action and large scale individual cases, including corporate fraud and misconduct, securities, Employee Retirement Income Security Act (“ERISA”) pension and health plan, breach of fiduciary duty, and investment mismanagement cases. Derek has served as lead and co-lead counsel in large, complex cases in both state and federal courts around the country.

Derek has been a plaintiffs’ attorney for over twenty years. He has a passion for taking on large corporations and holding them accountable for wrongdoing. Through all stages of litigation, including trial, he has helped recover over a billion dollars for institutions, retirement plans, retirees, employees, and consumers. Notable cases include mortgage-backed securities cases on behalf of the Federal Home Loan Banks of Chicago, Indianapolis and Boston, and ERISA class cases representing employees in pension cases against Enron, WorldCom, Countrywide, and Washington Mutual, and health plan cases against major pharmacy benefit managers, insurers, and drug manufacturers.

Many of Derek’s cases have required coordinating with state and federal agencies involved in litigation that parallels cases pursued by Keller Rohrback, including states attorneys general, the Department of Justice, and the Department of Labor. In addition, Derek has extensive experience negotiating complex, multi-party settlements, and coordinating with the many parties and counsel necessary to accomplish this.

Before joining Keller Rohrback, Derek served as a law clerk for the Honorable Michael R. Hogan, U.S. District Court for the District of Oregon, and was a trial attorney in the Employment Litigation Section of the Civil Rights Division of the U.S. Department of Justice in Washington, D.C., where he prosecuted individual and class action employment discrimination cases. He is a frequent speaker at national conferences on class actions, ERISA and other complex litigation topics.

Bar and Court Admissions

1994, Washington

1998, U.S. District Court for the Western District of Washington

1998, U.S. District Court for the Eastern District of Washington

2002, U.S. District Court for the Eastern District of Michigan

2004, U.S. District Court for the Northern District of Illinois

2010, United States Supreme Court

1998, U.S. Court of Appeals for the Ninth Circuit

2006, U.S. Court of Appeals for the Eleventh Circuit

2009, U.S. Court of Appeals for the Eighth Circuit

2010, U.S. Court of Appeals for the Fourth Circuit

2012, U.S. Court of Appeals for the Third Circuit

2013, U.S. Court of Appeals for the Second Circuit

2014, U.S. Court of Appeals for the First Circuit

2017, New York


Middlebury College – B.A., summa cum laude, 1989, American Literature, Stolley-Ryan American Literature Prize (highest departmental honors), Phi Beta Kappa 

University of Washington School of Law – J.D., with honors, 1994

Professional and Civic Involvement

King County Bar Association, Member

Washington State Bar Association, Member

American Bar Association, Member; Employment Benefits Committee Member

National Employment Lawyers Association, Member

American Civil Liberties Union of Washington, Cooperating counsel

Honors & Awards

U.S. Department of Justice Honors Program Hire, 1994

U.S. Department of Justice Award for Public Service, 1996

U.S. Department of Justice Achievement Award, 1996

Selected to Rising Stars list in Super Lawyers – Washington, 2005-2007

Named to Washington Super Lawyers list, 2007-2012, 2014-2017

Recipient of the 2010 Burton Award for Legal Achievement for the article, The Continuing Applicability of Rule 23(b)(1) to ERISA Actions for Breach of Fiduciary Duty,. Pension & Benefits Reporter, Bureau of National Affairs, Inc. (Sept. 1, 2009).

AV®, Peer Review Top-Rated by Martindale-Hubbell

Articles & Presentations

Speaker, Trends in Auto Defect Litigation, Seattle, WA, May, 2017

Panelist, Law Seminars International – VW Diesel Emissions Litigation: A Case Study of the Interplay Between Government Regulatory Activity and Consumer Fraud Class Actions, May 6, 2016.

Speaker, Class Action & Data Breach Litigation, Santa Barbara, CA, March, 2016.

Speaker, Fiduciary Challenges in a Low Return Environment, Seattle, WA, December, 2014.

Speaker, Post-Certification Motion Practice in Class Actions, Seattle, WA, June, 2014.

Speaker, Investment Litigation: Fees & Investments in Defined Contribution Plans, ERISA Litigation, Washington, D.C., 2012.

Speaker, Post-Certification: Motion Issues in Class Actions, Litigating Class Actions, Seattle, WA, 2012.

Derek W. Loeser, Erin M. Riley & Benjamin B. Gould, 2010 ERISA Employer Stock Cases: The Good, the Bad, and the In Between-Plaintiffs’ Perspective, Pension & Benefits Daily, Bureau of National Affairs, Inc. (Jan. 28, 2011).

Derek W. Loeser & Erin M. Riley, The Case Against the Presumption of Prudence, Pension & Benefits Daily, Bureau of National Affairs, Inc. (Sept. 10, 2010).

Speaker, ABA Mid-Winter Meeting, San Antonio, TX, 2010.

Speaker, 22nd Annual ERISA Litigation Conference – New York, NY, Nov. 2009.

Speaker, 22nd Annual ERISA Litigation Conference – Las Vegas, NV, Oct. 2009.

Derek W. Loeser & Benjamin B. Gould, The Continuing Applicability of Rule 23(b)(1) to ERISA Actions for Breach of Fiduciary Duty, Pension & Benefits Reporter, Bureau of National Affairs, Inc. (Sept. 1, 2009).

Derek W. Loeser & Benjamin B. Gould, Point/Counterpoint: Is Rule 23(b)(1) Still Applicable to ERISA Class Actions?, ERISA Compliance and Enforcement Library of the Bureau of National Affairs, Inc. (May 1, 2009).

Derek W. Loeser, The Legal, Ethical, and Practical Implications of Noncompetition Clauses: What Physicians Should Know Before They Sign, J.L. Med. & Ethics, Vol. 31:2 (2003).


Recent Posts

Keller Rohrback Files Suit Against Prescription Opioid Manufacturers

Keller Rohrback Files First Class Action Suit Against Wells Fargo Relating To Mortgage Interest Rate-Lock Extension Fees

Court Upholds Keller Rohrback’s Claims Against Nationstar Mortgage & Solutionstar For Alleged Excessive Inspection Fees

Keller Rohrback Continues to Investigate Wells Fargo Auto Loan Insurance Practices

Keller Rohrback Files Class Action Lawsuit on Behalf of Certain Wells Fargo Auto Loan Borrowers

Court Grants Preliminary Approval of $142 Million Settlement in Wells Fargo Unauthorized Accounts Class Action

Fifteen Lawyers Named 2017 Washington Super Lawyers & Rising Stars Lists

Court Grants Final Approval to 3.0-Liter Class Action Settlement & Bosch Class Action Settlement

Keller Rohrback L.L.P.: Plaintiffs in Wells Fargo Account Scandal Seek Court Approval for $142 Million Settlement

KR Investigating Allegations that Wells Fargo Merchant Services L.L.C. Charged Improper Fees to Small Businesses

Keller Rohrback: Wells Fargo Agrees to Pay $110 Million to Resolve Consumers’ Class Action Lawsuit About Unauthorized Accounts

Keller Rohrback L.L.P. Files Class-Action Lawsuit Over the Inflated Price of Insulin

Preliminary Approval of VW/Audi/Porsche 3-liter and Bosch Settlements in Volkswagen "Clean Diesel" Litigation

Bosch Agrees To $327.5 Million Settlement in VW Diesel Emissions Fraud Case

Settlement Agreement Filed for Volkswagen, Audi, Porsche 3.0-Liter

Keller Rohrback Files New Claims Against UnitedHealth Group & OptumRx for Unlawful “Clawback” Scheme

Important Info for Owners of TDI 3.0-Liter VWs/Audis/Porsches

Keller Rohrback Investigates Claims of Emissions Fraud in “Eco-Diesel” Ram 1500 & Jeep Grand Cherokee

Keller Rohrback L.L.P. Files Class Action Lawsuit against UnitedHealth Group and OptumRx

Keller Rohrback & Co-Counsel Sue Audi & Volkswagen over Cheating in A6, A8, Q5 Gas-powered vehicles

Audi at it again! Keller Rohrback Investigates More Emissions Cheating from VW Group!

Mass. Court Approves $300 MM Settlement Agreement in State Street Bank “Indirect Foreign Exchange” Class Action

Keller Rohrback Investigates OptumRx, UnitedHealthcare, & Cigna for Inflating Prescription Copays

Court Grants Final Approval 2.0-Liter Settlement

UnitedHealthcare and OptumRx Overcharge Their Customers for Prescription Drugs

Seattle Suspends Business Relationship with Wells Fargo over Fraud Allegations; Keller Rohrback Investigates Similar Practices

Keller Rohrback L.L.P. Investigating Unauthorized Accounts at Consumer Banks

Volkswagen Litigation Update – 8/25/2016

Volkswagen Litigation Update – Preliminary Approval of VW Settlement Granted

Volkswagen Litigation Case Update

Volkswagen and Audi 2.0-Liter Emissions Settlement

VW Litigation Case Update

Keller Rohrback Investigates Oklahoma Land Leaseholder Claims Following McClendon Conspiracy

VW Emissions Scandal

Volkswagen News From Around The Web