• Yale Law School (J.D., 1993), Senior Editor of the Yale Law Journal, Judge William E. Miller Prize (for the best paper on the Bill of Rights)
  • Harvard University (A.B., Social Studies, 1989), magna cum laude; Phi Beta Kappa, Detur Prize recipient, John Harvard Scholarship, Elizabeth Cary Agassiz Scholarship.


  • Hon. Diarmuid O'Scannlain, U.S. Court of Appeals, Ninth Circuit

Laura A. Seigle is a partner in the Los Angeles office of Irell & Manella LLP, where she is a member of the litigation practice group, focusing on intellectual property and entertainment litigation. She has served on the firm's Executive Committee, chaired the Hiring Committee, and served as the Diversity Coordinator. Since arriving at Irell & Manella in 1994, Ms. Seigle has represented a broad array of clients through trial, as well as in the federal and California appellate courts. She was a member of the trial team in City of Hope v. Genentech, which resulted in the largest verdict ever affirmed at that time by the California courts.   

Representative Matters

Ms. Seigle has tried numerous cases in federal and state courts, including:

  • Obtaining summary judgment for a semiconductor technology company in a patent licensing dispute, culminating in a $196-million settlement for her client.
  • Representing an outdoor advertising company in a six-week jury trial resulting in a multi-million-dollar verdict for her client and the rejection of $80 million claims against her client.
  • Representing City of Hope National Medical Center in a lawsuit concerning revolutionary biotech patents, leading to a $500-million jury verdict after a two month trial (City of Hope Nat. Med. Center v. Genentech, Inc. 43 Cal.4th 375 (2008)).
  • Defending Activision, Inc. against copyright claims to the True Crime: Streets of L.A. videogame, including obtaining summary judgment and successfully defending the judgment on appeal (Offley v. Activision, Inc., 273 Fed. Appx. 610 (9th Cir. 2008)). 
  • Obtaining a favorable verdict for a television studio in a two-week jury trial over executive producers' multi-million dollar claims and successfully defending the judgment on appeal (Sander/Moses v. NBC Studios, 142 Cal. App. 4th 1086 (2006)).
  • Defending a start-up aviation company in a multi-day evidentiary hearing against an attempt to shut down the company, resulting in a denial of a request for a preliminary injunction and dismissal of all claims.
  • Obtaining summary judgment for a recording artist in copyright infringement case and successfully defending the judgment on appeal (Coles v. Wonder, 283 F.3d 798 (6th Cir. 2002)).
  • Defending the creator of an environmental website in a multi-day evidentiary hearing against Barbra Streisand’s privacy and publicity rights claims, resulting in dismissal of the claims and denial of a request for preliminary injunction.

Ms. Seigle's other noteworthy cases include:

  • Representation of a pharmaceutical company in a patent infringement lawsuit, resulting in a $100 million settlement for her client.
  • Representation of Activision, Inc. in lawsuits concerning the development of the Call of Duty videogames. 
  • Defense of Warner Bros. Pictures over the rights to the motion picture Watchmen.
  • Representation of the acclaimed writer and director Peter Jackson in a dispute concerning Mr. Jackson's profit participation for the Lord of the Rings motion pictures.
  • Representation of studios against copyright claims in a television program, including obtaining dismissal of the claims and successfully defending the Ninth Circuit appeal (Burt v. Time Warner, Inc., 213 F.3d 641 (2000)).
  • Representation of high frequency trading in litigation alleging misappropriation of confidential source code.

In 2015, Ms. Seigle was named the Intellectual Property Litigator of the Year by the Century City Bar Association. In 2014, she was recognized as one of the 20 "Most Influential Women in IP Law" nationally by Law360; one of 75 "Top Intellectual Property Litigators" by the Daily Journal; and one of the "50 Women Leaders in Tech Law" by The Recorder. For many years, Ms. Seigle has been named to the Southern California "Super Lawyers" list by Los Angeles Magazine and was named as one of the Top 100 Women Lawyers in California by the Daily Journal.

In 2013-14, Ms. Seigle served as President of the Los Angeles County Bar Foundation, after being a member of the Foundation's Executive Committee and board for a decade. She currently serves on the Executive and Governance Committees of LACBA Counsel for Justice, which runs legal non-profit projects protecting victims of domestic violence, providing immigration legal assistance, assisting veterans, helping those living with AIDS, and teaching conflict resolution in schools and the community. Ms. Seigle is also a member of the national Executive Committee of the Yale Law School Association, and the Board of Governors of the Women Lawyers Association of Los Angeles. 

Before arriving at Irell & Manella, Ms. Seigle clerked for Judge Diarmuid O'Scannlain in the United States Court of Appeals for the Ninth Circuit.

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Bar & Court Admissions

  • 1994, California
  • U.S. Court of Appeals, Ninth Circuit and Sixth Circuit
  • U.S. District Court, Central, Northern, Eastern, and Southern Districts of California.