Monica K. Loseman is a co-chair of Gibson, Dunn & Crutcher’s Securities Litigation Practice Group. Recognized by Chambers, Lawdragon, Benchmark Litigation, and Super Lawyers as a top rated Securities Litigator, Ms. Loseman has substantial experience in a variety of complex civil and corporate litigation matters. She was featured as one of Lawdragon’s “500 Leading Litigators in America” from 2023 to 2025, which recognizes “attorneys who excel representing principally corporations and other organizations in litigating claims.” She was also featured as a Law Week Colorado 2017 “Lawyer of the Year” and Denver Business Journal 2016 “40 under 40” Winner. Most recently, Ms. Loseman was included in the 2024 edition of The Best Lawyers in America® for her work in Securities Regulation.
Ms. Loseman focuses her practice in corporate and securities litigation, investment advisor and fund litigation and investigations, financial reporting, accounting and related investigations, and accountant defense. Ms. Loseman is a first chair trial lawyer, with trials in the Delaware Court of Chancery, bench and jury trials across the country, private arbitrations, and several trials before SEC administrative law judges.
She defends companies and their officers and directors in class actions and derivative litigation and in regulatory investigations, including the Securities and Exchange Commission, Public Company Accounting Oversight Board, and the Department of Justice. Ms. Loseman also has substantial experience in corporate governance matters, including litigation involving mergers and acquisitions and control disputes. Ms. Loseman represents Board committees in conducting independent investigations involving allegations of corporate fraud and issues relating to financial reporting, accounting, internal controls, as well as special litigation matters and other issues, and is skilled at interacting with Board committees and other stakeholders in presenting results and recommendations. Clients have described Ms. Loseman as an “excellent oral advocate, organized, to the point and very client-focused.”
Ms. Loseman was appointed to the Financial Accounting Standards Advisory Council in 2023 and is currently serving her third term. Ms. Loseman is a frequent speaker on securities litigation and SEC Enforcement matters and has co-authored several articles and contributed to texts regarding securities litigation topics.
Ms. Loseman has long been dedicated to pro bono work: in 2006, Ms. Loseman was a member of the litigation team that received the Firm’s inaugural Frank Wheat Memorial Pro Bono Award for the team’s successful pro bono representation of a family seeking redress for multiple violations of their civil rights. Ms. Loseman is a Past-President and previously served on the Executive Committee of the Board for Disability Law Colorado, an organization dedicated to the protection and promotion of people with disabilities in Colorado.
Ms. Loseman attended the George Washington University Law School where she served as Editor-in-Chief of The George Washington Law Review and received several awards, including an award for completing her third year with the highest grade point average and the outstanding litigation student award. She graduated with high honors in 2002 and was elected to the Order of the Coif. Ms. Loseman received her Bachelor of Science degree in management from Rensselaer Polytechnic Institute in 1997. Prior to attending law school, Ms. Loseman was a consultant with KPMG Consulting in the Washington, DC area.
Ms. Loseman is admitted to practice law in the States of Colorado, California and New York, the U.S. District Courts for the District of Colorado, and the U.S. Court of Appeals for the Sixth and Tenth Circuits.
Capabilities
- Securities Litigation
- Accounting Firm Advisory and Defense
- Anti-Corruption & FCPA
- Class Actions
- ESG: Risk, Litigation, and Reporting
- Law Firm Defense
- Litigation
- Securities Enforcement
- White Collar Defense and Investigations
Credentials
Education:
- George Washington University - 2002 Juris Doctor
- Rensselaer Polytechnic Institute - 1997 Bachelor of Science
Admissions:
- California Bar
- Colorado Bar
- New York Bar