William B. Federman

MANGING PARTNER

William B. Federman is the founder and managing partner of Federman & Sherwood. Mr. Federman has more than forty (40) years of diverse, hands-on, trial, and appellate experience in the areas of data breach litigation, class action litigation, securities litigation, and complex litigation. Mr. Federman has represented clients in federal courts, state courts, the Supreme Court of the United States of America, multidistrict litigation proceedings, and arbitration forums across the United States.

Mr. Federman leads the firm’s class action litigation practice, bringing claims on behalf of individuals to remedy violations of consumer protection laws, securities laws, data breach laws, and product liability laws, among others. Mr. Federman has served as lead counsel, co-lead counsel, and as a member of the executive steering committee on hundreds of class action cases throughout the United States during his career. Mr. Federman is a staunch advocate and has won hundreds of millions of dollars for his clients.

In the legal community, Mr. Federman is well known for his high ethical standards and competency as a trial attorney. Mr. Federman has received the Martindale-Hubbell peer review rating of AV Preeminent for both ethical standards and legal ability. Mr. Federman has also served on the Oklahoma County Bar Ethics Committee and has been honored as a featured speaker at many bar events, including the American Bar Association, the Houston Bar Association, and the Oklahoma Bar Association. 

Outside of the office, Mr. Federman enjoys cheering on the Oklahoma City Thunder and spending time with his favorite four-legged companion, Reggie.

Awards & Honor

• Securities Litigation and Arbitration Law Firm of the Year in Oklahoma – 2018 (Global Law Experts Annual Awards).
• Securities Litigation and Arbitration Law Firm of the Year in Oklahoma – 2019 (Corporate INTL Magazine).
• Oklahoma Super Lawyers list by Thomson Reuters – 2019.
• Recognized for Exceptional Service and Outstanding Performance on behalf of the Federal Bar Association (Oklahoma City Chapter) Pro Bono Program, 2018–2019.

Speaking Engagements

• From Breach to Bench, Data Breach Litigation and a Look At What’s Next, Class Action Money and Ethics Conference, 2025. 
• Class Actions, New Rules and Data Breach Cases, 40th Annual Oklahoma County Bar Association Winter Seminar, 2019.
• A Case Study of Ethical Issues in Complex Litigation and Trends in Class Certification, 39th Annual Oklahoma County Bar Association Winter Seminar, 2018.
• Talkin’ About Insurance Coverage and Complex Litigation: What Every Lawyer and Client Should Know,  38th Annual Oklahoma County Bar Association Winter Seminar, 2017.
• Securities Litigation:  Using Data to Make the Case, Bloomberg BNA, 2016.
• The Changing Landscape for Prosecution of Financial Claims Involving Insolvent Companies,  37th Annual Oklahoma County Bar Association Winter Seminar, 2016.
• Current Status of Securities Class Actions:  Where are the Court Taking Us?, Houston Bar Association, Securities Litigation and Arbitration Section Meeting, 2014.
• Class & Derivative Actions and Securities Litigation,  2013 Annual Meeting of the American Bar Association, Business and Corporate Litigation Committee.
• Inside a Disclosure Crisis, 30th Annual Meeting of the Northwest Securities Institute in conjunction with the Washington Bar Association.
• Managing Directors’ Liability, 3rd Annual Energy Industry Directors’ Conference.
• Executive Liability – 2009 D & O Market Trends, seminar hosted by Chartis Insurance.
• Litigation and Employment Law Update, seminar hosted by the Securities Industry Association, Compliance and Legal Division.
• Derivative Actions and Protecting the Corporation; Critical Issues in Today’s Banking, seminar presented by the Oklahoma Bar Association and the Oklahoma Bankers Association.
• Arbitration – What Is It? Why Should a Lawyer Suggest or Use It?, Oklahoma Bar Association.
• The Attorney and Accountant as Targets in Failed Financial Institution Litigation, American Bar Association Trial Practice Committee.
• Effective Arbitration in the 1990’s, Adapting to Build a Successful Practice, Oklahoma County Bar Association.
• Current Issues in Direct Investments and Limited Partnerships: The Litigation Scene From ALL Perspectives, American Bar Association, Litigation Section.
•  Stockbroker Litigation and Arbitration, Securities Arbitration Institute.
• From Breach to Bench, Data Breach Litigation and a Look At What’s Next, 2025 Class Action Money & Ethics Conference, May 8, 2025.

Author

• Who’s Minding the Store: The Corporate Attorney-Client Privilege, 52 O.B.J. 1244, 1981;
• Potential Liability From Indirect Remuneration in Private Oil and Gas Offerings, 11 Sec. Reg. L.J. 135, 1983; and
• Capitalism and Reality Meet in the Courts. . .Finally, 59 O.B.J. 3537, 1987.

Memberships

• Arbitration Panel, New York Stock Exchange, 1985;
• Oklahoma County Bar Association (Member, Committee on Professionalism, 1987-1990);
• Oklahoma, Texas, New York and American Bar Association (Committee on Securities Litigation and Corporate Counsel);
• The District of Columbia Bar;
• Securities Industry Association, Law and Compliance Division; Defense Research Institute;
• American Inns of Court (Barrister, 1990-1993);
• Martindale-Hubble – Received peer review rating of AV Preeminent in both ethical standards and legal ability;
• Litigation Counsel of America (Trial Lawyer and Appellate Lawyer Honorary Society);
• Oklahoma Bar Association, Rules of Professional Conduct Committee (2020)