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Press Release

Latham Strengthens Securities and M&A Litigation Practice With Prominent Litigator Sarah Lightdale

April 7, 2026
Lightdale brings extensive experience in M&A litigation, securities class actions, and complex commercial disputes.

Latham & Watkins LLP is pleased to announce that Sarah Lightdale has rejoined the firm’s New York office as a partner in the Securities and M&A Litigation Practice. Lightdale focuses on M&A litigation, securities class actions and derivative cases, complex commercial disputes, and internal and regulatory investigations.

“We are thrilled to welcome Sarah back to the firm,” said Marc Jaffe, Office Managing Partner of Latham & Watkins in New York. “As a former Latham attorney, Sarah brings a deep understanding of our culture and collaborative approach to complex matters. Her credibility with boards and senior management, combined with her ability to operate effectively across practices, makes her an exceptional addition to our New York office and global litigation practice.”

“Sarah’s addition enhances our depth in handling high-level M&A litigation and securities-related matters,” added Andrew Clubok, Global Chair of Latham’s Securities and M&A Litigation Practice. “Her practice aligns directly with our focus on bet-the-company disputes arising from transformational transactions, disclosure events, and periods of market volatility. Sarah strengthens our ability to support clients facing shareholder, fiduciary, and post-transaction litigation at the most consequential moments. We are delighted to have her back on our team.”

Lightdale represents a diverse portfolio of clients, including individual directors and officers, public and private companies, investment banks, and private equity and venture capital firms. She has extensive experience litigating securities class actions, shareholder derivative suits, and M&A disputes in federal and state courts nationwide, including the Delaware Court of Chancery. She works closely with boards of directors and special committees, providing counsel on a wide range of topics including transaction processes, shareholder activism, and fiduciary issues. 

“Rejoining Latham feels like a sort of homecoming,” said Lightdale. “I built the foundation of my practice over the course of a decade here, and I’m excited to bring everything I’ve developed since back with me now. My securities and M&A litigation focus fits naturally into the firm’s corporate platform, and I’m looking forward to leveraging that combination for clients facing their highest-stakes disputes and inflection points.”

Lightdale rejoins Latham from Cooley LLP. She was previously counsel in Latham’s New York office, where she began her career. She received her JD from NYU School of Law and her BA, cum laude, from Columbia University, and clerked for Judge Eric N. Vitaliano of the US District Court for the Eastern District of New York.

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