Antonio J. Perez-Marques
Represents U.S. and global clients in critical litigations and government investigations.
Tony represents a broad range of U.S. and non-U.S. corporations and financial institutions in their most critical litigations and government investigations, as well as complex matters involving both elements. His clients include many of the largest and most sophisticated corporations in industries including technology, financial services, energy and consumer products.
Tony’s civil practice focuses on securities class actions and complex commercial litigation. He has achieved outright victories in both plaintiff- and defendant-side representations on dispositive motions and after trial and is sought after by clients for his skill in the courtroom and high-stakes witness examinations.
Tony’s investigations practice spans AML, FCPA, economic sanctions and securities enforcement and various federal and state authorities. Clients turn to him frequently when investigations may result in litigation.
Experience
Civil Litigation
- Trial victory securing $168 million jury verdict for WhatsApp and Meta in federal suit against commercial spyware maker NSO Group
- Trial victory for ExxonMobil as plaintiff in federal suit seeking U.S. tax refund in connection with multi-billion-dollar natural gas partnership with Qatar
- Summary judgment in favor of Meta and WhatsApp as to liability on all claims in suit against NSO Group
- Summary judgment in favor of ExxonMobil as plaintiff in Administrative Procedure Act suit against U.S. Department of Treasury and OFAC, vacating sanctions penalty
- Summary judgment in favor of global financial institution on all claims, affirmed by Second Circuit, in whistleblower retaliation suit under Sarbanes-Oxley and Dodd-Frank
- Dismissal of action against Enel SpA to enforce €433 million foreign judgment, in first New York appellate decision to recognize jurisdictional defense to enforcement of foreign money judgments
- Dismissal of all claims against Eletrobras in federal securities litigation seeking to establish enforceability of $5.6 billion in debt obligations and enjoin the company’s privatization
- Dismissal of all claims in federal and state securities class actions against XP Inc. concerning its U.S. IPO, with federal dismissal affirmed by Second Circuit
- Dismissal of all claims against global bank in whistleblower retaliation claims under False Claims Acts
- Dismissal of all claims against Solomon R. Guggenheim Foundation in action asserting conversion and replevin as to Picasso’s Woman Ironing
Government Investigations
- U.S. broker-dealer in multi-agency anti-money laundering investigation of Latin America wealth management business
- Financial institution in multi-agency sanctions investigation by the DOJ, Manhattan District Attorney, bank regulators and OFAC
- Global bank in DOJ investigation relating to alleged evasion of Iranian sanctions
- Rating agency (NRSRO) in SEC investigation of off-channel communications
- Standard & Poor’s Ratings Services in SEC and state attorney general investigations
- Real estate firm in New York Attorney General investigation of alleged violations of rent stabilization laws
- Siemens in landmark SEC and DOJ FCPA investigations
Pro Bono
- Dismissal of indictment on Fourth Amendment grounds before New York Court of Appeals
- Everytown for Gun Safety and other clients in anti-gun-violence litigation
News
Recognition
Benchmark Litigation – New York, Star
Education
- cum laude
- Florence Allen Scholar
- magna cum laude
Qualifications and admissions
- State of New York
- U.S. Court of Appeals, First Circuit
- U.S. Court of Appeals, Ninth Circuit
- U.S. Court of Appeals, Second Circuit
- U.S. District Court, Colorado
- U.S. District Court, E.D. New York
- U.S. District Court, S.D. New York
- U.S. Supreme Court