Marc J. Sonnenfeld

Professional Biography

Noted by Chambers USA as “an established figure for both his commercial and securities litigation practices,” Marc J. Sonnenfeld defends class actions asserting violations of the federal securities laws, derivative cases, claims arising from mergers and acquisitions, and appraisal actions, as well as regulatory and enforcement proceedings. Marc has argued numerous successful motions to dismiss, including recent victories in the Sixth, Seventh, and Ninth Circuits, and been recognized for his extensive trial experience.

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