Kemper Diehl

Kemper Diehl is an accomplished trial lawyer and trusted advisor in complex business and financial disputes. His experience covers a wide range of cases, including breach of contract, securities fraud, breach of fiduciary duty, patent infringement, antitrust, trade secret, and mass tort litigation.

Diehl is a stand-up advocate with experience representing clients before state and federal courts across the country, most often appearing in California, Texas, New York, and Delaware. His clients range from Fortune 100 companies in high-stakes lawsuits to individual investors and entrepreneurs who need a strategist and advocate to pursue their interests against formidable adversaries.

Best Lawyers in America has named Diehl “One to Watch” in each of the past four years (2021 to 2024) with recognition of his accomplishments in Commercial Litigation, Banking and Finance Litigation, and Intellectual Property Litigation. In 2023 and 2024, Lawdragon named Diehl one of 500 leading young lawyers in the country in “Lawdragon 500X – The Next Generation.” Super Lawyers likewise recognized Diehl as a “Rising Star” in 2022 and 2023.

NOTABLE REPRESENTATIONS

• Shafi v. SoftBank – Representing Abraham Shafi, co-founder of tech unicorn IRL, in litigation against SoftBank in California and Delaware courts arising from the company’s shutdown in 2023.
• Porch Group v. Gallagher Re and China Construction Bank –Representing Porch Group in Texas and New York litigation against Gallagher Re and China Construction Bank arising from defective reinsurance.
• Hussein v. NextGen Healthcare – Represented Ahmed Hussein, a major shareholder and former director of NextGen Healthcare, in securities fraud and indemnification claims against the company. Diehl briefed a winning appeal before securing an $11 million recovery in arbitration.
• Expedia – Defended Expedia in a multi-year breach-of-contract and trade secret misappropriation case. After extensive arbitration proceedings, the matter resolved successfully before trial.
• Arendi v. Apple, Google – Representing patent-owner Arendi in patent infringement actions against Apple, Google, and other tech companies related to smartphone software.
• Arigna v. Apple, Google – Represented semiconductor patent-owner Arigna Technology on infringement claims against Apple, Google, and other tech companies before the International Trade Commission and federal courts.
• Start-Up Co-Founders – Represented co-founders of high-growth social media start-up to obtain payouts they were deprived when a new investor acquired the company.

BACKGROUND

Diehl graduated from Columbia Law School in 2013, where he was a James Kent Scholar for academic accomplishment. He clerked for Judge William H. Walls on the U.S. District Court for the District of New Jersey and practiced law in New York before moving to Susman Godfrey in Seattle.

As a lawyer, Diehl leverages business and finance experience he built earlier in his career at Bain and THL Partners. As a management consultant at Bain & Company, Diehl developed strong industry experience in financial services by advising private equity, insurance, and consumer lending clients. After Bain, Diehl joined private equity firm Thomas H. Lee Partners as an investment professional.  He contributed financial analysis underlying two >$1 billion investments.

Diehl graduated cum laude from Dartmouth College in 2006, where he was captain of the men’s NCAA Division I swimming team.

Honors & Distinctions

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Education