Jason Sheasby
Partner
Los Angeles, California
About Jason Sheasby
Jason Sheasby is an American attorney based in Los Angeles, California. He is a partner at Irell & Manella LLP, where he focuses on complex litigation, including intellectual property disputes. His practice centers on patent litigation and related matters involving technology companies, pharmaceutical firms, medical device manufacturers, and research institutions.
Sheasby earned a Bachelor of Arts in Philosophy from Pomona College in 1996. He graduated summa cum laude and was elected to Phi Beta Kappa. He later received a Juris Doctor from Harvard Law School in 1999, graduating cum laude. While in law school, he worked as a research assistant to Professor Arthur Miller and contributed to revisions of Federal Practice & Procedure.
At Irell & Manella, Sheasby has served as lead or co-lead counsel in jury trials and arbitration proceedings. His recent work includes patent and contract disputes involving companies such as Netlist, Samsung, Micron, G+ Communications, and DePuy Synthes. Several of these cases resulted in jury verdicts involving significant damages awards. He has also represented clients in arbitration matters related to pharmaceutical royalty agreements.
In addition to his legal practice, Sheasby is a co-founder of TORL Biotherapeutics, a biopharmaceutical company developing antibody therapies for cancers, including ovarian and pancreatic cancer. He serves on the board of trustees of Pomona College. He is admitted to practice in California and in multiple federal courts.
Areas of Focus
Career Background
TORL Biotherapeutics
Education
Media
Press
Jason Sheasby Calls Attention to the Cost of Complexity in Modern Decision-Making
Read the full article ›Wharton School Dean and Intellectual Property Attorney to Join Pomona College Board of Trustees
Read the full article ›Awards & Recognition
- Litigator of the Year — The American Lawyer (2024)
- Leaders of Influence: Litigators & Trial Attorneys — Los Angeles Business Journal (2021, 2025)
- Lawdragon 500 Leading Global IP Lawyers — Lawdragon (2025)
- Litigator of the Year (California) — Managing IP Americas Awards (2025)
- Patent Star — Managing IP (2025)
- Finalist, IP Lawyer of the Year — The Recorder (2024)
- Leading Commercial Litigators — Daily Journal (2024)
- Top IP Lawyers — Daily Journal (2015, 2019, 2021–2024)
- Trials MVP — Law360 (2018, 2020, 2023, 2024)
- Ranked in Intellectual Property (Patent Litigation) — Chambers USA (2014–2024)
- The Best Lawyers in America (2023–2025)
- IP Star — Managing Intellectual Property (2015, 2018–2024)
- Intellectual Property MVP — Law360 (2022)
- Law360 Rising Star in IP (2013)
Licenses & Certifications
- Admitted to the State Bar of California
- Supreme Court of the State of California
- U.S. District Court for the Central District of California
- U.S. District Court for the Northern District of California
- U.S. District Court for the Western District of Wisconsin
- U.S. Court of Appeals for the Fifth Circuit
- U.S. Court of Appeals for the Federal Circuit
Boards & Memberships
- Pomona College — Member, Board of Trustees
Frequently Asked Questions
What does Jason Sheasby do?
Jason Sheasby is a partner at Irell & Manella LLP, where he focuses on complex litigation, including intellectual property and patent disputes involving technology, pharmaceutical, and medical device companies.
What is Jason Sheasby known for?
He is known for serving as lead or co-lead counsel in high-profile patent and contract jury trials, including cases involving Netlist, Samsung, Micron, and DePuy Synthes, and has been recognized as Litigator of the Year by The American Lawyer (2024) and named among Leaders of Influence: Litigators & Trial Attorneys.
Where is Jason Sheasby based?
He is based in Los Angeles, California.
Where did Jason Sheasby study?
He earned a Bachelor of Arts in Philosophy from Pomona College in 1996 and a Juris Doctor from Harvard Law School in 1999.
Who does Jason Sheasby work for?
He works for Irell & Manella LLP, where he is a partner.
Last updated February 24, 2026