AnnaMarie Van Hoesen has delivered big-win litigation victories in federal courts, state courts, and arbitration in complex, high-stakes disputes. Her successes in entertainment, intellectual property, and law firm professional responsibility matters often garner high accolades.
Clients in entertainment, healthcare, real estate, and other industries seek AnnaMarie’s counsel on copyright and trademark issues, trade secrets misappropriation claims, disputes over profit participation, idea submission, film finance, and media torts. She also represents clients in complex commercial cases, breach of contract, business tort, and corporate governance disputes. Her landmark, $940 million jury verdict for a medical software company was one of the largest trade secret verdicts in US history. Her defense victories include a two-week jury trial in a $250 million partnership dispute that California’s Daily Journal recognized among the year’s Top Verdicts.
When national and international law firms find themselves embroiled in allegations of malpractice allegations, disqualification or sanctions motions, or internal investigations, AnnaMarie is often the attorney they choose. She serves on the Professional Responsibility and Ethics Committee of the Los Angeles County Bar Association, and regularly writes and lectures on professional responsibility matters. She also serves on the board of the Association of Business Trial Lawyers in Los Angeles.
AnnaMarie is passionate about representing domestic violence survivors and serves on the board of the New Leadership Council for Family Violence Appellate Project, a nonprofit dedicated to pro bono representation of domestic violence survivors in civil appeals.
I am passionate about delivering wins for my clients.
Representative Matters
- Secured a $940 million trade secrets verdict for Epic Systems Corp., one of the leading health care software companies in the United States, in a substantial corporate espionage case against Tata Consultancy Services (TCS), which is a part of one of the largest industrial conglomerates in India. After a 10-day trial, an eight-member jury found that TCS stole Epic’s trade secrets and other confidential information about Epic’s proprietary software. The verdict represents one of the largest trade secrets verdicts in US history and perhaps the largest verdict of any kind in Wisconsin.
- Won a defense verdict in a $250 million breach of partnership case, following a two-week jury trial in California state court.
- Prevailed in two international arbitrations concerning a trademark license agreement on behalf of the American licensee against the Canadian licensor, in the automotive collision repair industry.
- Obtained a $130 million settlement in favor of plaintiffs News Corp subsidiary Move, Inc., as well as the National Association of Realtors, on the first day of trial in a lawsuit against online real estate portal Zillow and two of its senior executives. The plaintiffs, who own and operate the Realtor.com website, brought claims for trade secret misappropriation, breach of contract, and breach of fiduciary duty.
- Defeated several motions to disqualify large, international law firms, including a law firm defending a motion picture studio and producers of a film in litigation involving defamation and copyright claims.
- Won a defense verdict following a bench trial in Los Angeles County Superior Court, defending the managing member in a dispute involving several LLCs that were established to develop real estate in Southern California. Defeated claims alleging that our client breached his fiduciary duties as the managing member, and won a counterclaim for damages and attorneys’ fees.
- Prevailed on numerous anti-SLAPP motions in film finance disputes, resulting in the dismissal of more than $500 million in claims.
Credentials
Service / Recognition
Overview
AnnaMarie Van Hoesen has delivered big-win litigation victories in federal courts, state courts, and arbitration in complex, high-stakes disputes. Her successes in entertainment, intellectual property, and law firm professional responsibility matters often garner high accolades.
Clients in entertainment, healthcare, real estate, and other industries seek AnnaMarie’s counsel on copyright and trademark issues, trade secrets misappropriation claims, disputes over profit participation, idea submission, film finance, and media torts. She also represents clients in complex commercial cases, breach of contract, business tort, and corporate governance disputes. Her landmark, $940 million jury verdict for a medical software company was one of the largest trade secret verdicts in US history. Her defense victories include a two-week jury trial in a $250 million partnership dispute that California’s Daily Journal recognized among the year’s Top Verdicts.
When national and international law firms find themselves embroiled in allegations of malpractice allegations, disqualification or sanctions motions, or internal investigations, AnnaMarie is often the attorney they choose. She serves on the Professional Responsibility and Ethics Committee of the Los Angeles County Bar Association, and regularly writes and lectures on professional responsibility matters. She also serves on the board of the Association of Business Trial Lawyers in Los Angeles.
AnnaMarie is passionate about representing domestic violence survivors and serves on the board of the New Leadership Council for Family Violence Appellate Project, a nonprofit dedicated to pro bono representation of domestic violence survivors in civil appeals.
I am passionate about delivering wins for my clients.
Areas of Focus
Representative Matters
- Secured a $940 million trade secrets verdict for Epic Systems Corp., one of the leading health care software companies in the United States, in a substantial corporate espionage case against Tata Consultancy Services (TCS), which is a part of one of the largest industrial conglomerates in India. After a 10-day trial, an eight-member jury found that TCS stole Epic’s trade secrets and other confidential information about Epic’s proprietary software. The verdict represents one of the largest trade secrets verdicts in US history and perhaps the largest verdict of any kind in Wisconsin.
- Won a defense verdict in a $250 million breach of partnership case, following a two-week jury trial in California state court.
- Prevailed in two international arbitrations concerning a trademark license agreement on behalf of the American licensee against the Canadian licensor, in the automotive collision repair industry.
- Obtained a $130 million settlement in favor of plaintiffs News Corp subsidiary Move, Inc., as well as the National Association of Realtors, on the first day of trial in a lawsuit against online real estate portal Zillow and two of its senior executives. The plaintiffs, who own and operate the Realtor.com website, brought claims for trade secret misappropriation, breach of contract, and breach of fiduciary duty.
- Defeated several motions to disqualify large, international law firms, including a law firm defending a motion picture studio and producers of a film in litigation involving defamation and copyright claims.
- Won a defense verdict following a bench trial in Los Angeles County Superior Court, defending the managing member in a dispute involving several LLCs that were established to develop real estate in Southern California. Defeated claims alleging that our client breached his fiduciary duties as the managing member, and won a counterclaim for damages and attorneys’ fees.
- Prevailed on numerous anti-SLAPP motions in film finance disputes, resulting in the dismissal of more than $500 million in claims.
Credentials
Admissions
- California
Education
- Columbia University School of Law, JD, Harlan Fiske Stone Scholar, 2011
- University of California, Berkeley, BA, Phi Beta Kappa, 2008
Court Admissions
- US District Court, Central District of California
- US District Court, Eastern District of California
- US District Court, Northern District of California
- US District Court, Southern District of California
Service / Recognition
Awards
- Lawdragon 500 Leading Global Entertainment, Sports, & Media Lawyers, 2025-2026
- Southern California Super Lawyers, Rising Star, 2017-2022
- Los Angeles Business Journal, Qualified Nominee, Women’s Leadership Awards, 2021
Community
- Family Violence Appellate Project, New Leadership Council Member
- Vista Del Mar, Leadership Advisory Board Member
Service to the Bar
- Association of Business Trial Lawyers, Board Member
- Women Lawyers Association of Los Angeles, Member
- Asian Pacific American Bar Association, Member
- Professional Responsibility and Ethics Committee (PREC), Los Angeles County Bar Association, Member