Ashley (Lee) McMahon
Counsel | She/Her/Hers
Overview
When businesses and individuals face high-stakes antitrust issues, Ashley (Lee) McMahon delivers with confidence and competence. Lee’s broad practice covering complex civil and criminal litigation, government investigations, mergers and acquisitions, and premerger filings uniquely situates her to advise clients adeptly on all areas of competition law.
Career & Education
- Connecticut College, B.A., magna cum laude, 2009
- University of Virginia School of Law, J.D., 2016
- District of Columbia
- Virginia
- U.S. District Court for the District of Columbia
Professional Activities and Memberships
- American Bar Association
- Antitrust Section
- Washington Council of Lawyers
- American Bar Association
Ashley (Lee)'s Insights
Client Alert | 1 min read | 01.20.26
FTC Announces Annual Update to HSR and Section 8 Thresholds
The Federal Trade Commission (FTC) has announced its annual updates to the thresholds and filing fees related to the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (the HSR Act). These dollar thresholds are indexed annually based on changes in the U.S. gross national product and the Consumer Price Index.
Client Alert | 6 min read | 05.16.25
Recent Antitrust Enforcer Statements Signal New Administration’s Direction and Priorities
Client Alert | 3 min read | 02.27.25
No-Poach Not Going Anywhere: FTC Chair Announces New Labor Task Force
Representative Matters
- Represented a Japanese automotive parts manufacturer in In re Automotive Parts Antitrust Litigation, the multi-district litigation stemming from the largest criminal antitrust investigation in U.S. history” into cartel allegations.
- Represented an aerospace and defense company in class action litigation stemming from a grand jury indictment alleging no-poach agreements.
- Represented a major regional health care provider in class action litigation alleging no-poach agreements.
- Represented client in a grand jury investigation alleging no-poach agreements.
- Represented a multinational telecommunications company in the premerger filing and Second Request process of a billion-dollar sale of an anime streaming business.
- Represented a private equity client in its acquisition of a billion-dollar aerospace & defense products and medical products manufacturer.
- Represented a health care IT solutions company in an FTC investigation and follow-on class action litigation alleging exclusive dealing arrangements related to e-prescriptions.
- Represented a mission critical communications enterprise as a third party in an FTC investigation in the law enforcement body-worn camera industry.
- Represented a pharmaceutical manufacturer in multi-district litigation alleging price-fixing of generic drugs.
Ashley (Lee)'s Insights
Client Alert | 1 min read | 01.20.26
FTC Announces Annual Update to HSR and Section 8 Thresholds
The Federal Trade Commission (FTC) has announced its annual updates to the thresholds and filing fees related to the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (the HSR Act). These dollar thresholds are indexed annually based on changes in the U.S. gross national product and the Consumer Price Index.
Client Alert | 6 min read | 05.16.25
Recent Antitrust Enforcer Statements Signal New Administration’s Direction and Priorities
Client Alert | 3 min read | 02.27.25
No-Poach Not Going Anywhere: FTC Chair Announces New Labor Task Force
Insights
Cases and Precedents: Cartels: USA 2025
|11.01.24
Global Competition Review
Authored in 2023, 2024, 2025
Ashley (Lee)'s Insights
Client Alert | 1 min read | 01.20.26
FTC Announces Annual Update to HSR and Section 8 Thresholds
The Federal Trade Commission (FTC) has announced its annual updates to the thresholds and filing fees related to the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (the HSR Act). These dollar thresholds are indexed annually based on changes in the U.S. gross national product and the Consumer Price Index.
Client Alert | 6 min read | 05.16.25
Recent Antitrust Enforcer Statements Signal New Administration’s Direction and Priorities
Client Alert | 3 min read | 02.27.25
No-Poach Not Going Anywhere: FTC Chair Announces New Labor Task Force




