Felicia H. Ellsworth


Ellsworth, Felicia H.

Felicia Ellsworth has represented public and private companies in a wide variety of civil matters before state and federal courts, at both the trial and appellate levels. Her trial practice focuses on commercial litigation, and has included representing clients in commercial and intellectual property disputes in both state and federal courts and administrative tribunals. Ms. Ellsworth’s appellate practice includes matters involving a wide range of issues of both federal and state law, including intellectual property, trade secret misappropriation, contract law, and criminal law and procedure. Ms. Ellsworth has presented oral argument on several occasions in both the state and federal appeals courts, and served as a special assistant district attorney in the Middlesex County District Attorney’s Office from November 2010-April 2011.

 Ms. Ellsworth has represented clients before the United States Courts of Appeals for the First, Sixth, Ninth and Federal Circuits, and has presented oral arguments in the First and Sixth Circuits. Ms. Ellsworth is also a member of the First Circuit Criminal Justice Act panel, providing pro bono representation to indigent criminal defendants on appeal.

Prior to joining the firm, Ms. Ellsworth served as a law clerk to Chief Justice John G. Roberts, Jr. of the Supreme Court of the United States, and then-Chief Judge Michael Boudin of the United States Court of Appeals for the First Circuit. During law school, Ms. Ellsworth served as editor-in-chief of The University of Chicago Law Review and interned with the United States Attorney's Office for the District of Massachusetts.

Publications & News


June 17, 2014

US Supreme Court Issues Unanimous Ruling in Favor of WilmerHale Client POM Wonderful

On June 12, 2014, the US Supreme Court ruled unanimously in favor of WilmerHale client POM Wonderful LLC (POM) in an important case involving the intersection of the Lanham Act’s prohibition on false advertising and the Federal Food, Drug, and Cosmetic Act's (FDCA) regulation of food and beverage labeling.

January 6, 2014

WilmerHale Announces the Elevation of Partners and Special Counsel

We are pleased to announce the elevation of our new partners and special counsel.

June 26, 2013

WilmerHale Plays Key Role in Historic Supreme Court Ruling Favoring Marriage Equality

June 1, 2012

First Circuit Holds DOMA Unconstitutional

April 27, 2010

WilmerHale Wins Fifth Case in the Federal Circuit in Two Weeks

December 11, 2008

Massachusetts Releases Proposed Pharmaceutical and Medical Device Manufacturer Code of Conduct

October 30, 2008

Federal Circuit Decision in In re Bilski Has Far-Reaching Implications

August 13, 2008

Note on Comparative Treatment of Business Method and Software Patents in the United States and European Union

Co-authored with Robert C. Pozen, Harvard Business School Note 309-023.

January 1, 2004

Comment, Worst Seats in the House: Stadium-Style Movie Theaters and the Americans with Disabilities Act, 71 U. Chi. L. Rev. 1109

Professional Activities

Ms. Ellsworth is admitted to practice in the Commonwealth of Massachusetts and before the United States District Court for the District of Massachusetts and the United States Courts of Appeals for the First, Sixth and Federal Circuits. She is also a member of the Boston Bar Association.


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JD, High Honors, University of Chicago Law School, 2005, Order of the Coif; Editor-in-Chief, The University of Chicago Law Review

BS, Foreign Service, cum laude, Georgetown University, School of Foreign Service, 2000, Honors Certificate in Muslim-Christian Understanding

Bar Admissions



The Hon. Michael Boudin, US Court of Appeals for the First Circuit, 2005 - 2006

The Hon. John G. Roberts, Jr., US Supreme Court, 2006 - 2007