About
Provided by Umberg\Zipser
Umberg/Zipser LLP represents businesses, founders, and professionals in complex commercial litigation across California, with a focus on ownership disputes, closely held company conflicts, and high-value claims.
The firm handles breach of contract, partnership and shareholder disputes, business torts, fraud and unfair competition, fiduciary duty claims, and professional liability defense, including claims against attorneys. Matters are handled in state and federal courts, as well as arbitration and mediation.
Clients include closely held and middle-market companies, founders, executives, and professionals across industries. The firm also represents law firms and attorneys in professional liability and legal ethics matters.
Recent highlights include: A trial victory for founder recovering compensation, equity value, and enhanced damages. Secured $47.4M jury verdict for entrepreneur in fiduciary duty dispute. Achieved complete defense victory in $19M fraud case, including JNOV. Obtained dismissal in $135M arbitration. Prevailed on anti-SLAPP and secured dismissal of $10M+ claims. Won multiple summary judgments in employment and business disputes.
The firm has particular experience with partnership and shareholder disputes, intellectual property litigation, fiduciary duty claims, and professional liability defense, often requiring alignment of litigation strategy with business objectives.
