Michael McMahon
About Michael
Michael has extensive experience, both at Cooley and as a former Department of Justice (DOJ) trial attorney, leading complex, multijurisdictional commercial matters, post-acquisition disputes and internal investigations. He has represented purchasers, sellers and underwriters in nearly 100 post-acquisition disputes, and he regularly provides pre-deal counseling on litigation matters in M&A transactions. Michael has served as lead trial counsel on behalf of plaintiffs and defendants in matters involving claims of fraud, trade secret misappropriation, misuse of confidential information and breach of contract, among others. He also represents companies and individuals facing investigations from federal and state government entities – such as the DOJ, the Securities and Exchange Commission (SEC) and state attorneys general offices.
Passions
Pro bono service
Traveling
I take a results-oriented approach to helping clients win commercial disputes and resolve compliance concerns.
Experience
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PassKey Invests in indiGOtech to Accelerate Smart Mobility Innovation
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Clubessential Holdings to Merge With Xplor Technologies
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Red Canary Announces Acquisition by Zscaler
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Boston Celtics Announce $6.1 Billion Sale to Group Led by William Chisholm
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CallTower Receives Investment From BV Investment Partners
Admissions and credentials
- Massachusetts
Rankings and accolades
Best Lawyers: Ones to Watch in Commercial Litigation and Criminal Defense-White Collar
Chambers USA: Litigation: General Commercial – Massachusetts (2025)
The Legal 500 US: General Commercial Disputes (2025)
Get In Touch
Location
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