Kenneth M. Trujillo-Jamison

Managing Partner
Biography
  • Bio
  • Honors
  • Winning Matters
  • Speaking Engagements
  • Professional Affiliations
  • Publications
  • News

Kenneth Trujillo-Jamison, Managing Partner of Willenken LLP, is a nationally recognized litigator who represents major corporations in complex, high-stakes disputes.

His work is defined by strategic precision, strong courtroom execution, and the ability to align litigation strategy with clients’ broader business objectives, informed by his in-house secondment experience. His practice spans complex commercial, social media, and entertainment litigation, as well as trademark and copyright disputes, and class action defense.

Kenneth regularly represents leading companies in matters involving consumer protection, user-generated content, and emerging issues in technology and media. On behalf of a major social media company, he has maintained a perfect record of securing dismissals at the pleadings stage in litigation challenging the company’s content-moderation decisions, with several of those victories recently affirmed by the Second, Fifth, and Ninth Circuits.

Kenneth has also played a key role in some of the firm’s most significant matters. As a member of AbbVie’s trial team in a high-profile pharmaceutical supply dispute against Takeda in the Delaware Court of Chancery, he examined and defended multiple expert witnesses and contributed to securing a judgment exceeding $500 million. He also helped obtain a complete defense verdict for Disney and Pixar in a copyright infringement case involving Moana and has secured numerous early dismissals of copyright infringement claims in cases nationwide. In addition, he represented a prominent portrait photographer in a right-of-publicity case brought by the rapper Jay-Z.

He also has substantial experience in regulatory matters and consumer class actions, including counseling Southern California Gas Company on regulatory issues before the California Public Utilities Commission. He has represented Procter & Gamble in a dispute involving claims of unfair and deceptive labeling for a leading body wash product, and Mattel and Fisher-Price in false advertising cases involving a widely marketed infant product.

Kenneth’s work has been recognized by leading publications and industry organizations. He has been named a “recommended lawyer” by Legal 500 in “U.S. City Elite – Los Angeles: Commercial Disputes” since its launch in 2026 and a “Future Star” by Benchmark Litigation since 2025. The Los Angeles Business Journal also continues to recognize him as a “Leader of Influence,” after previously naming him among professionals “Thriving in Their 40s” from 2022 to 2024.

In addition to his practice, Kenneth is a leader in the Los Angeles legal community and in advancing diversity and inclusion within the profession. He serves as President of the Board of Inner City Law Center, and as a board member of the California Minority Counsel Program and the Friends of the Los Angeles County Law Library. He is also a member of the Chancery Club of Los Angeles, an invitation-only organization of distinguished lawyers and judges engaged in professional, civic, and philanthropic leadership. He previously held leadership roles with the Housing Rights Center and served on the Board of Trustees of the Los Angeles Copyright Society. He is also an alumnus of the Leadership Council on Legal Diversity, where he was selected as a Fellow in 2022 and a Pathfinder in 2018.

Kenneth began his legal career at Munger, Tolles & Olson and served as a law clerk to the Honorable Paul J. Watford of the U.S. Court of Appeals for the Ninth Circuit. He earned his J.D. from Yale Law School, where he served as notes editor of the Yale Law Journal.

Willenken Secures Appellate Wins in Second, Fifth, and Ninth Circuits for Major Social Media Company
Willenken Secures Dismissals on the Pleadings in Two Recent Cases for Prominent Social Media Company
Willenken Wins Extraordinary $506 Million Trial Verdict in Delaware Chancery Court for AbbVie
Kenneth Trujillo-Jamison Joins Board of Friends of the Los Angeles County Law Library

November 5, 2026

Willenken Marks Tenth Consecutive Year of Recognition by Benchmark Litigation

October 29, 2026

Willenken Recognized by Chambers USA in “Litigation: General Commercial – Highly Regarded”

June 4, 2026

Biography

Kenneth Trujillo-Jamison, Managing Partner of Willenken LLP, is a nationally recognized litigator who represents major corporations in complex, high-stakes disputes.

His work is defined by strategic precision, strong courtroom execution, and the ability to align litigation strategy with clients’ broader business objectives, informed by his in-house secondment experience. His practice spans complex commercial, social media, and entertainment litigation, as well as trademark and copyright disputes, and class action defense.

Kenneth regularly represents leading companies in matters involving consumer protection, user-generated content, and emerging issues in technology and media. On behalf of a major social media company, he has maintained a perfect record of securing dismissals at the pleadings stage in litigation challenging the company’s content-moderation decisions, with several of those victories recently affirmed by the Second, Fifth, and Ninth Circuits.

Kenneth has also played a key role in some of the firm’s most significant matters. As a member of AbbVie’s trial team in a high-profile pharmaceutical supply dispute against Takeda in the Delaware Court of Chancery, he examined and defended multiple expert witnesses and contributed to securing a judgment exceeding $500 million. He also helped obtain a complete defense verdict for Disney and Pixar in a copyright infringement case involving Moana and has secured numerous early dismissals of copyright infringement claims in cases nationwide. In addition, he represented a prominent portrait photographer in a right-of-publicity case brought by the rapper Jay-Z.

He also has substantial experience in regulatory matters and consumer class actions, including counseling Southern California Gas Company on regulatory issues before the California Public Utilities Commission. He has represented Procter & Gamble in a dispute involving claims of unfair and deceptive labeling for a leading body wash product, and Mattel and Fisher-Price in false advertising cases involving a widely marketed infant product.

Kenneth’s work has been recognized by leading publications and industry organizations. He has been named a “recommended lawyer” by Legal 500 in “U.S. City Elite – Los Angeles: Commercial Disputes” since its launch in 2026 and a “Future Star” by Benchmark Litigation since 2025. The Los Angeles Business Journal also continues to recognize him as a “Leader of Influence,” after previously naming him among professionals “Thriving in Their 40s” from 2022 to 2024.

In addition to his practice, Kenneth is a leader in the Los Angeles legal community and in advancing diversity and inclusion within the profession. He serves as President of the Board of Inner City Law Center, and as a board member of the California Minority Counsel Program and the Friends of the Los Angeles County Law Library. He is also a member of the Chancery Club of Los Angeles, an invitation-only organization of distinguished lawyers and judges engaged in professional, civic, and philanthropic leadership. He previously held leadership roles with the Housing Rights Center and served on the Board of Trustees of the Los Angeles Copyright Society. He is also an alumnus of the Leadership Council on Legal Diversity, where he was selected as a Fellow in 2022 and a Pathfinder in 2018.

Kenneth began his legal career at Munger, Tolles & Olson and served as a law clerk to the Honorable Paul J. Watford of the U.S. Court of Appeals for the Ninth Circuit. He earned his J.D. from Yale Law School, where he served as notes editor of the Yale Law Journal.

Honors

Winning Matters

Willenken Secures Appellate Wins in Second, Fifth, and Ninth Circuits for Major Social Media Company
Willenken Secures Dismissals on the Pleadings in Two Recent Cases for Prominent Social Media Company
Willenken Wins Extraordinary $506 Million Trial Verdict in Delaware Chancery Court for AbbVie

Speaking Engagements

Professional Affiliations

Publications

  • Yale Law School, J.D., 2011, notes editor of the Yale Law Journal
  • Princeton University, M.A., 2008
  • Washington University in St. Louis, B.A., magna cum laude, 2002
  • California
  • Supreme Court of the United States
  • United States Court of Appeals for the First Circuit
  • United States Court of Appeals for the Second Circuit
  • United States Court of Appeals for the Third Circuit
  • United States Court of Appeals for the Fifth Circuit
  • United States Court of Appeals for the Ninth Circuit
  • United States Court of Appeals for the Eleventh Circuit
  • United States District Court for the Central District of California
  • United States District Court for the Eastern District of California
  • United States District Court for the Northern District of California

related alerts (view all)

Video Case Alert: Warner Chappell Music, Inc. v. Nealy
Serving Those In Need: Inner City Law Center Video – Part II
Serving Those In Need: Inner City Law Center Video – Part I

related alerts (view all)

Video Case Alert: Warner Chappell Music, Inc. v. Nealy
Serving Those In Need: Inner City Law Center Video – Part II
Serving Those In Need: Inner City Law Center Video – Part I

latest news about kenneth

Kenneth Trujillo-Jamison Joins Board of Friends of the Los Angeles County Law Library

November 5, 2026

Willenken Marks Tenth Consecutive Year of Recognition by Benchmark Litigation

October 29, 2026

Willenken Recognized by Chambers USA in “Litigation: General Commercial – Highly Regarded”

June 4, 2026

latest news about kenneth

Kenneth Trujillo-Jamison Joins Board of Friends of the Los Angeles County Law Library

November 5, 2026

Willenken Marks Tenth Consecutive Year of Recognition by Benchmark Litigation

October 29, 2026

Willenken Recognized by Chambers USA in “Litigation: General Commercial – Highly Regarded”

June 4, 2026