People
Billy Marsh
Biography
Billy handles high-stakes litigation and investigations.
Billy is called upon by clients for their most important legal matters. He has specific expertise in shareholder and securities litigation and mass tort matters, where he has obtained noteworthy victories for his clients.
For example, Billy achieved a complete defense verdict after a two-week final arbitration hearing in an action brought by a bankruptcy litigation trustee seeking over USD600 million in damages for alleged breaches of fiduciary duty. He successfully defended Twitter in shareholder actions seeking to halt the USD44 billion acquisition of the company by Elon Musk. And the American Lawyer recognized Billy in its Litigator of the Week Series for his work on behalf of Dow Chemical in fending off litigation from the State of Maine that sought to hold the company liable for environmental contamination caused by per- and polyfluoroalkyl substances (PFAS) across the state.
Billy received the 2025 Texas Outstanding Young Litigator Award from the Litigation Section of the State Bar of Texas. Clients have praised Billy as “super smart, capable, thoughtful, and responsive” and appreciate Billy’s steady hand.
Practice areas
- Securities litigation and enforcement
- Antitrust litigation
- Corporate and commercial litigation
- M and A litigation
- White-collar defense and global investigations
Sectors
- Chemicals
- Consumer and retail
- Oil and gas
- Industrials and manufacturing
- PFAS
Selected experience
- Obtained complete defense verdict denying all claims in arbitration brought by a bankruptcy litigation trustee alleging claims of breach of fiduciary duty and seeking over USD600 million in damages.
- Defended Twitter in shareholder class actions arising from $44 billion acquisition by Elon Musk and secured dismissal of action in Delaware Chancery Court seeking to enjoin the transaction.
- Obtained partial dismissal of securities class action and full dismissal of derivative action filed against an online real estate services company, its directors and officers, and Chamath Palihapitiya, among others, relating to de-SPAC merger between the company and SPAC entity backed by Social Capital.
- Defended a financial services company focused on alternative assets in a securities class action and an adversary proceeding brought by a bankruptcy litigation trustee.
- Defended the directors and officers of Kalera in an adversary proceeding brought by a bankruptcy litigation trustee asserting claims for breach of fiduciary duty.
- Defended Huntsman against parallel putative class actions pending in federal and Texas state court alleging violations of the Securities Act and Exchange Act in connection with two public stock offerings.
- Defense of underwriting syndicate in parallel, putative securities class actions pending in federal court and Pennsylvania state court alleging violations of the Securities Act in connection with multiple public stock offerings.
- Obtained dismissal of securities class action and related derivative actions filed against Tenet Healthcare and its directors and officers, arising from a regulatory proceeding, and successfully defended dismissal of derivative actions on appeal.
- Defended an oilfield services company against securities class actions in Colorado state and federal courts that alleged misstatements in connection with the company’s initial public offering.
- Successfully defended T. Boone Pickens, BP Capital Management, and related defendants in securities case alleging misrepresentations regarding hedge fund strategy.
Education
- JD, University of Virginia School of Law
- BS, cum laude , Brigham Young University
Admissions
- Attorney-at-Law, State of Texas, US
- Registered Foreign Lawyer, England and Wales, 2024
- U.S. District Court for the Northern District of Texas
- U.S. District Court for the Southern District of Texas
- U.S. District Court for the Western District of Texas
- U.S. District Court for the District of Colorado
Languages
- Spanish