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Benjamin Gruenstein serves as a trusted advisor to companies, boards of directors and senior executives navigating their most consequential legal challenges in the areas of government and internal investigations, regulatory enforcement, white-collar criminal defense and complex civil litigation.
Before launching Gruenstein Law, Gruenstein spent 14 years as a partner at Cravath, Swaine & Moore, where he was a founding member of the firm’s Investigations and Regulatory Enforcement Practice. In that role, he represented companies and executives in investigations and litigation involving securities and accounting fraud, money laundering, healthcare fraud, trade sanctions, theft of trade secrets, the Foreign Corrupt Practices Act and the False Claims Act. He also routinely advised companies and their boards of directors on corporate governance and regulatory compliance.
Lawdragon Honors
| Honor | Year | Practice |
|---|---|---|
| The 2026 Lawdragon 500 Global Leaders in Crisis Management | 2026 | Investigations, Enforcement, Litigation |
| The 2026 Lawdragon 500 Leading Lawyers in America | 2026 | Litigation, esp. Investigations & Regulatory Enforcement |
| The 2026 Lawdragon 500 Leading Litigators in America | 2026 | Investigations, inc. FCPA, Complex Civil Litigation |
| The 2025 Lawdragon 500 Leading Lawyers in America | 2025 | Litigation, esp. Investigations & Regulatory Enforcement |
| The 2025 Lawdragon 500 Leading Litigators in America | 2025 | Investigations, inc. FCPA, Complex Civil Litigation |
| The 2025 Lawdragon 500 Leading Global Litigators | 2025 | International Investigations & Disputes |
| The Lawdragon 500 Global Leaders in Crisis Management | 2025 | Investigations, Enforcement, Litigation |
| The 2024 Lawdragon 500 Leading Lawyers in America | 2024 | Litigation, esp. Investigations & Regulatory Enforcement |
| The 2024 Lawdragon 500 Leading Litigators in America | 2024 | Investigations, inc. FCPA, Complex Civil Litigation |
| The 2024 Lawdragon 500 Leading Global Litigators | 2024 | International Investigations & Disputes |
| The Lawdragon Legends of 2023 | 2023 | |
| The 2023 Lawdragon 500 Leading Lawyers in America | 2023 | Litigation, esp. Investigations & Regulatory Enforcement |
| The 2022 Lawdragon 500 Leading Lawyers in America | 2022 | Litigation, esp. Investigations & Regulatory Enforcement |
| Lawdragon 500 Leading Litigators in America | 2022 | Investigations, inc. FCPA, Complex Civil Litigation |
| The 2021 Lawdragon 500 Leading Lawyers in America | 2021 | Litigation, esp. Investigations & Regulatory Enforcement |
| The 2020 Lawdragon 500 Leading Lawyers in America | 2020 | Litigation, esp. Investigations & Regulatory Enforcement |
| The 2019 Lawdragon 500 Leading Lawyers in America | 2019 | Litigation, esp. Investigations & Regulatory Enforcement |
| The 2018 Lawdragon 500 Leading Lawyers in America | 2018 | Litigation, esp. Investigations & Regulatory Enforcement |
| The 2017 Lawdragon 500 Leading Lawyers in America | 2017 | Litigation, esp. Investigations & Regulatory Enforcement |
| The 2016 Lawdragon 500 Leading Lawyers in America | 2016 | Litigation, esp. Investigations & Regulatory Enforcement |
| The 2014-15 Lawdragon 500 Leading Lawyers | 2014-2015 | Litigation, esp. Investigations & Regulatory Enforcement |
| The 2013 Lawdragon 500 Leading Lawyers | 2013 | Litigation, esp. Investigations & Regulatory Enforcement |
Gruenstein is a first-chair trial lawyer, who has tried numerous cases as a federal prosecutor and in private practice. He also regularly argues cases in federal courts of appeals, and recently argued a case before the U.S. Supreme Court.
Gruenstein has been selected by Lawdragon as one of the “500 Leading Lawyers in America.”
Clients and peers have praised Gruenstein as “highly esteemed” and “known for his strategic acumen, meticulous approach and dedication to achieving the best possible outcomes for his clients.” Others have noted that he “brings an exceptional amount of intellect to his cases and is strategically on point,” and has “impeccable judgment” and “total command of the facts of a case.”
Before joining Cravath, Gruenstein served from 2002 to 2008 as an Assistant U.S. Attorney in the Criminal Division of the U.S. Attorney’s Office for the Southern District of New York. He is a summa cum laude graduate of Harvard College and a magna cum laude graduate of Harvard Law School, where he was an editor of the Harvard Law Review. After law school, he clerked on the U.S. Court of Appeals for the District of Columbia Circuit for Judge Stephen F. Williams and on the U.S. Supreme Court for Justice David H. Souter.