William C. McCaughey


William C. McCaughey


William (Bill) McCaughey is a litigation and investigations attorney with broad experience in counseling clients across industries in matters involving potential violations of securities laws, class action litigation, criminal antitrust investigations, and pre-merger antitrust investigations.

Bill’s experience includes conducting internal investigations related to potential criminal antitrust matters, defending an antitrust class-action lawsuit, assisting clients with the preparation of Hart-Scott Rodino premerger notification filings, counseling clients on insider trading compliance, and representing public companies in responding to securities fraud investigations by the Securities and Exchange Commission (SEC). He also represents complainants and respondents in Section 337 unfair importation investigations before the U.S. International Trade Commission.

While in law school, Bill interned at the SEC and at the Fraud Division and the Organized Crime and Gang Section of the U.S. Department of Justice, Criminal Division.

Bill is a member of the Business Litigation & Dispute Resolution, Government Enforcement Defense & Investigations, and Antitrust Practice Groups.


  • Member of International Trade Commission Trial Lawyers Association

Presentations and Publications

  • Co-author, “Expert networks, alternative data and managing risks of material non-public information,” Journal of Financial Compliance, Volume 7, Number 2 (December 2023)
28 December 2023 Article

2023 Year End Developments Before the Corporate Transparency Act Goes Into Effect on January 1, 2024  

As 2024 approaches, FinCEN issued a number of updates and guidance before the Corporate Transparency Act goes into effect on January 1, 2024.
13 November 2023 Innovative Technology Insights

Artificial Intelligence, the SEC, and What the Future May Hold

With the growing use of artificial intelligence (AI) in financial markets, broker-dealers and investment advisers need to pay attention to the risks posed by AI on firms’ compliance with federal securities laws.
12 July 2023 Manufacturing Industry Advisor

What Every Multinational Company Should Know About...Section 337 Cases at the International Trade Commission

The United States International Trade Commission (ITC) is a fast-paced, high-stakes forum for companies with significant U.S. operations and/or U.S. intellectual property rights.
30 March 2023 Article

Prepare For Extraterritorial Enforcement Of US Antitrust Law

The U.S. Department of Justice recently reaffirmed its commitment to act decisively and to aggressively investigate and prosecute antitrust violations that affect consumers in the U.S.
26 January 2023 Article

Hart-Scott-Rodino Reporting Thresholds and Filing Fee Structure to Change Significantly

On January 26, 2023, the FTC published a Notice in the Federal Register announcing the latest annual adjustments to the statutory thresholds under the Hart-Scott-Rodino Antitrust Improvements Act of 1976.
12 October 2022 Legal News: Government Enforcement Defense & Investigations

What You Need to Know about the Corporate Transparency Act’s Final Rule

CTA's Final Rule is an update to U.S. anti-money laundering laws, estimated to affect over 32 million entities by requiring new reports of beneficial owners.