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Derek W. Loeser


1201 Third Avenue, Suite 3200
Seattle, WA 98101 

P: 206.623.1900
F: 206.623.3384



Derek has been a plaintiffs’ attorney for over 25 years. As a senior partner and a member of Keller Rohrback’s Executive Committee, Derek’s passion for holding large corporations accountable for wrongdoing has helped recover billions of dollars for consumers, retirees, governments and institutions.

Derek has served in leadership roles in major complex cases across the country. Currently, he is co-lead counsel in In re Facebook, Inc. Consumer Privacy User Profile Litigation, the MDL litigation against Facebook stemming from the Facebook Cambridge Analytica scandal.

Derek also serves as lead counsel for the Wells Fargo unauthorized account consumer class action. In this case, Derek and the Keller Rohrback team achieved a $142 million settlement requiring the bank to refund all improper fees and provide first-of-its kind credit damage reimbursement, among other relief, to Wells Fargo customers.

In addition to his class action work, Derek helps manage the Keller Rohrback team representing state and local government entities in a number of matters involving significant public health crises. For example, Derek leads the Keller Rohrback team litigating government cases against opioid manufacturers and distributors in The National Prescription Opioid Litigation. In the Opioid MDL, Derek serves on the Expert and Law & Briefing Committees, and directs the litigation against a major generic opioid manufacturer. He also represents school districts and counties in litigation against the e-cigarette company, JUUL, for targeting and addicting youth. These cases are quintessential examples of the type of litigation Derek and the Keller Rohrback team fervently pursue: corporate fraud and malfeasance causing serious harm to the public.

Some of Derek’s other notable cases include mortgage-backed securities cases on behalf of the Federal Home Loan Banks of Chicago, Indianapolis and Boston; ERISA class cases on behalf of employees whose retirement savings were decimated by corporate fraud and abuse on the part of Enron, WorldCom, Countrywide, and Washington Mutual, among others. He has also litigated fraud, RICO, and antitrust cases against drug manufacturers, pharmacy benefit managers, and insurance companies for conspiring to drive up the cost of life-saving medications such as insulin.

Many of Derek’s cases have required coordinating with state and federal agencies involved in litigation that parallels cases pursued by Keller Rohrback, including state 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. He is also frequently asked to speak at national conferences about class actions, public health litigation, ERISA, and other complex litigation topics.

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. He was also employed as a trial attorney in the Employment Litigation Section of the Civil Rights Division of the U.S. Department of Justice in Washington, D.C.

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

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

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

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

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

2010, United States Supreme Court

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

National Trial Lawyers, Top 100 Civil Plaintiff Trial Lawyers in Washington

Listed as Lawdragon 500 Leading Lawyers in America, 2018

Named to Super Lawyers list in Super Lawyers – Washington, 2007-2012, 2014-2020

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

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).

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

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

U.S. Department of Justice Achievement Award, 1996

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

Articles & Presentations

Panelist, HarrisMartin’s MDL Conference: JUUL and Capital One Data Breach Litigation – JUUL, E-Cigarettes & Vaping Litigation – An Overview of JUUL Legal Landscape: Case Filings, Judicial Rulings and MDL Submissions, Beverly Hills, CA, September, 2019.

Panelist, HarrisMartin’s MDL Conference: Opioid, Equifax & Talcum PowderOpioid Litigation Landscape: Venues, Jurisdictional Hurdles, Defenses and Cause of Action, St. Louis, MO, Nov, 2017.

Panelist, HarrisMartin’s National Opioid Litigation ConferenceCurrent Landscape of Opioid Litigation, Chicago, IL, October, 2017.

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).

The National Trial Lawyers

Recent Posts

Did Wells Fargo put your mortgage into forbearance without your consent because of COVID-19? Keller Rohrback is investigating.

Wells Fargo may have fraudulently “corrected” loan dates on thousands of mortgages. Did this happen to you?

25 Keller Rohrback Attorneys Named to 2020 Washington Super Lawyers and Rising Stars Lists

Is your pension at risk in the hands of American General Insurance Company (AIG)?

Is your gym or other membership plan charging you during a COVID-19 closure?

Denied a refund on a flight cancelled due to COVID-19? Keller Rohrback wants hear your story.

Law Practice in the Time of COVID-19: How to Keep Cases Moving

Were you a passenger on a COVID-19 infected cruise ship?

Keller Rohrback investigates Fifth Third Bank for opening unauthorized accounts

Keller Rohrback and ACLU-WA Announce Travel Ban Settlement

Keller Rohrback Files Suit Against JUUL for Allegedly Targeting Teens

Facebook Consumer Privacy Litigation Case Update

16 Keller Rohrback Attorneys Named to 2019 Washington Super Lawyers and Rising Stars Lists

$307.5M Class Settlement with Fiat Chrysler, Bosch Will Compensate Owners and Lessees, Provide Repairs that Protect Environment

Are You Concerned About Your or Your Teen’s Vaping Habit or Addiction to Using JUUL?

Did Facebook Share Your Personal Information Without Your Consent?

Court Says Government Must Do More to Show It Is Reuniting Refugee Families

Derek Loeser Named Co-Lead Counsel in Facebook Privacy Litigation

17 Lawyers from Keller Rohrback Named to 2018 Washington Super Lawyers and Rising Stars Lists

Judge Approves $142 Million Wells Fargo Unauthorized Accounts Settlement; Customers Have Until July 7 to File a Claim

$142 Million Wells Fargo Unauthorized Accounts Settlement Approved

Keller Rohrback Files Consolidated Class Action Complaint Against Pharmacy Benefit Managers About Their Role in the EpiPen Pricing Scandal

Clawbacks Contribute to the High Costs of Prescription Drugs

Facebook Data Breach Investigated by Keller Rohrback

Keller Rohrback Files Suits on Behalf of Skagit County, Mount Vernon, Sedro-Woolley, and Burlington Against Opioid Manufacturers 

King County and Keller Rohrback File Suit Against Opioid Manufacturers

Oregon Sues Monsanto, With the Help of Keller Rohrback, Over Toxic PCBs

Customers with Unauthorized Accounts from Wells Fargo Can Now File a Claim in $142 Million Settlement

ACLU Asks for Injunction to Stop Trump’s Muslim Ban From Separating Refugees From Their Families

More Cities and Governments File Suit Against Prescription Opioid Manufacturers

Keller Rohrback Files Suit Against Prescription Opioid Manufacturers

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 Keller Rohrback Lawyers Named 2017 Washington Super Lawyers & Rising Stars

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

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

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

Keller Rohrback Files Suit on Behalf of Porsche, Audi, and VW Consumers

Keller Rohrback Warns Consumers About VW Goodwill Package

KR Launches Investigation After EPA Adds Audi & Porsche to VW Clean Air Act Violation

VW Emissions Scandal

Volkswagen News From Around The Web

Nationwide Class Action Complaint Filed Against VW

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