Jason M. HorstAttorney

Wendel Rosen Black & Dean LLP 1111 Broadway, 24th FloorOakland, CA 94607
Alter Ego

Jason represents businesses, public entities, professional and nonprofit organizations, and individuals in complex civil litigation and appellate cases involving a wide variety of technology, commercial contract, real estate, and insurance coverage disputes.  He has a proven record of success representing both plaintiffs and defendants at trial, on appeal, and in alternative dispute resolution proceedings.  He prides himself in the ability to deliver creative, efficient solutions to thorny legal problems.

Jason also represents companies in developing and implementing effective risk management strategies, including the acquisition of appropriate insurance for the business risk his clients assume through their operations. He prepares and negotiates insurance specifications, wrap insurance endorsements, and indemnity provisions. For captive insurers, he drafts the insurance policies and provisions issued by the captive.

Jason served as an extern for the Honorable Jeffrey S. White, U.S. District Court for the Northern District of California, in 1995.  He was awarded the University of San Francisco School of Law’s Academic Excellence Award for his graduating class.  He also served as a Comments Editor for the University of San Francisco Law Review and has published scholarly articles in law journals at both the University of Texas and the University of San Francisco.


Technology Litigation Experience

  • Represented national retailer in bringing complex commercial contract claim against a major software company related to shortcomings of customized computer software, resulting in early multi-million dollar settlement.*

  • Secured dismissal with prejudice of suit against manufacturer of billing software alleging non-infringement of the manufacture’s patents and damages based on the manufacturers assertion of patent rights.*

  • Prevailed in a bench trial regarding various individuals’ rights to ownership of a mobile application company, resulting in multi-million dollar judgment in favor of individual client*

  • Represented founders of a technology company in bringing suit against attorneys who purported to represent them in forming the company, then destroyed the company’s value by attempting to obtain more stock in the company for themselves*

  • Represented law firm in malpractice action alleging that the firm fraudulently advised a company to pursue patent litigation against major U.S. technology companies.*

  • Represented prominent national law firm in a legal malpractice action arising out of a failed merger between two technology companies.*


Real Estate Litigation Experience

  • Representing trustee in eminent domain litigation involving potential inverse condemnation issues and extent of harm to retained property.*

  • Representing purchaser of San Francisco apartment building in litigation arising out of mismanaged real estate transaction.*

  • Represented various national retailers in lease disputes regarding issues including presence of anchor tenants, use of common spaces, and indemnification.*


Other Complex Litigation Experience

  • Counseled both insureds and insurance carriers regarding a variety of coverage disputes.*

  • Represented pharmaceutical manufacturer in multi-jurisdictional litigation related to pharmaceutical pricing and pharmacy reimbursement under Medicaid and Medicare.*

  • Represented national disabilities rights organization in filing amicus curiae brief to the Ninth Circuit Court of Appeals as part of a successful effort to overturn a lower court’s ruling and establish favorable Circuit precedent.*



* Work done at prior firm.

  • Selected for inclusion in Northern California Super Lawyers magazine, “Rising Star,” 2015-2016



  • IP Legal Forum, Wendel Rosen's Intellectual Property blog, contributing author, 2014 - present
  • “The Meaning of ‘Life’: The Morning-After Pill, the Question of When Life Begins, and Judicial Review,” 16 TEX. J. WOMEN & L. 205, 2007
  • “Imaginary Intent: The California Supreme Court’s Search for a Specific Legislative Intent that Does Not Exist,” comment, 39 USF. L. REV 1045, 2005