Jonathan E. Sommer is the former chair of the Litigation service group at Lubin Olson and a partner in the Litigation, Commercial Litigation, Real Estate Litigation, and Securities service groups. He has a wide-ranging commercial litigation practice, with emphasis on real estate, securities fraud, defamation and business disparagement, and business torts and contracts. His practice has ranged from smaller cases involving disputes among partners and family-owned businesses to larger cases against some of the most formidable investment banks and hedge funds in the world. In larger cases, he has teamed up with his partners at Lubin Olson to oppose national law firms in litigating high-profile matters subject to ongoing press coverage. The full transcript of one of his depositions of a hedge fund manager was featured in The New York Times. He has been honored by Thomson Reuters as a Northern California Super Lawyer for 2023-2024.

Mr. Sommer has litigated in state and federal trial and appellate courts and before private arbitration panels. In addition to real estate and securities, he has litigated cases involving partnership disputes, officer and director liability, defamation and business disparagement, landlord-tenant, land use, trade secrets, mergers and acquisitions, unfair competition, false advertising, attorney-client disputes, accounting malpractice, and insurance coverage.