Cleary Gottlieb Steen & Hamilton's practice covers securities and M&A litigation, representing special committees, financial advisors, and acquirers. The team brings experience in federal securities litigation before the Delaware Court of Chancery, including traditional Rule 10b-5 matters. Leading the practice from New York is Roger Cooper, who litigates shareholder, class action, and derivative action cases arising from securities, M&A, and corporate governance. Cooper advised T-Mobile US during the dismissal of direct and derivative class actions arising from the merger with Sprint. He is joined by Mark McDonald, who focuses on disputes at the federal and Delaware Court of Chancery, and secured a victory for OCI N.V. in an expedited litigation concerning the interpretation of a joint venture agreement. The team extended its offering with the hiring of Breon Peace in May 2025.
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Key clients
- BofA Securities, Inc.
- Cynosure Lutronic Inc.
- OCI N.V.
- Skyview Capital LLC
- Special Committee of the Board of Directors of Chewy, Inc.
- T-Mobile US
Work highlights
Represented OCI N.V and successfully obtained a final judgment in favor of our client with respect to a lawsuit filed by Proman USA (Beaumont) LLC in the Delaware Court of Chancery related to the parties’ rights under a joint venture agreement.
Advised T-Mobile in a purported direct and derivative class action brought by a T-Mobile stockholder in the Delaware Chancery Court.
Represented one of the Chewy directors as a defendant in a shareholder derivative complaint filed in the Delaware Chancery Court for breach of fiduciary duty in connection with a transaction with Chewy’s controlling stockholder.
Lawyers
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Practice head
Roger Cooper
Other key lawyers
Mark McDonald; Breon Peace