Atty. Michael A. Lesser

Atty. Michael A. Lesser

Mr. Lesser joined Thornton Law Firm as an associate in 1995 after previously clerking at the firm.

Boston Boston 31 yrs experience 31 year
Call (833) 474-2040 Email Book Appointment

Profile Summary

About Michael A. Lesser at a glance

Michael A. Lesser is a Partner based in Boston, Massachusetts, practicing at Thornton Law Firm LLP. They have 31+ years of legal experience, licensed to practice since 1995. Their practice focuses on whistleblower and consumer. Admitted to practice in Massachusetts (1995), U.S. District Court, District of Massachusetts (1997), and U.S. Court of Appeals, First Circuit (2006). Educated at Boston University (J.D., 1995) and Brandeis University (B.A., 1992). Recognitions include BV Distinguished. Active member of American Bar Association American Association for Justice. Serands clients in Boston, MA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. Lesser joined Thornton Law Firm as an associate in 1995 after previously clerking at the firm
  • He heads the firm’s Whistleblower litigation section, with a focus on representing individuals that report violations of securities laws subject to the SEC Whistleblowing statute and individuals that report fraud on the government through the Federal and state False Claims Act statutes
  • In 2020 Mr. Lesser’s client, an FX trader who worked for Bank of New York Mellon, was awarded the then largest individual SEC whistleblower award in the history of SEC whistleblower litigation
  • The client’s almost $50 million dollar award was for providing original information to the Securities and Exchange Commission that resulted in a successful enforcement action that returned a significant amount of money to harmed investors
  • Mr. Lesser was rated as one of New England’s Top Rated Lawyers by ALM Media and Martindale-Hubbell™ from 2020-2022
  • Mr. Lesser was named an Up-and-Coming Lawyer by Massachusetts Lawyers’ Weekly in 2002
  • He was selected as a Massachusetts Super Lawyer in 2021, 2022, and 2023
  • He was selected as a Massachusetts Super Lawyers Rising Star in 2005 and 2010

Practice Areas Explained

Michael A. Lesser's Areas of Practice

Each practice area below reflects the types of cases Michael A. Lesser handles, with a brief overview of what that area of law covers.

Whistleblower & Retaliation

Michael A. Lesser is one of 3,552 whistleblower attorneys indexed nationally. Browse whistleblower attorneys in Massachusetts →

Consumer Protection

Consumer protection attorneys for fraud, lemon law, debt harassment, and deceptive trade practices.

Michael A. Lesser is one of 50,607 consumer attorneys indexed nationally. Browse consumer attorneys in Massachusetts →

Jurisdictional Context

Why local counsel matters in Massachusetts

Practicing law in Massachusetts. Legal matters in Massachusetts are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Boston are typically filed in the local municipal court or the appropriate Massachusetts state district court, depending on subject matter and amount in controversy. An attorney licensed in Massachusetts brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Massachusetts courts without local counsel or pro hac vice admission.

Looking for additional Massachusetts attorneys? Browse all attorneys in Boston or all attorneys in Massachusetts.

Frequently Asked

Common questions about Michael A. Lesser

Where is Michael A. Lesser's law office located?
Michael A. Lesser's law practice is located in Boston, Massachusetts. The firm is Thornton Law Firm LLP. You can contact the office directly through this profile page.
What practice areas does Michael A. Lesser handle?
Michael A. Lesser focuses on whistleblower, consumer. Each practice area listed reflects experience handling cases of that type in Massachusetts.
How long has Michael A. Lesser practiced law?
Michael A. Lesser has 31+ years of legal experience and has been licensed since 1995.
Where did Michael A. Lesser go to law school?
Michael A. Lesser earned their education at (J.D., 1995); (B.A., 1992).
How can I contact Michael A. Lesser for a consultation?
You can contact Michael A. Lesser directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.
What awards or recognition has Michael A. Lesser received?
Michael A. Lesser's notable recognition includes: BV Distinguished.

Education

J.D.
Boston University
- 1995
B.A.
Brandeis University
- 1992

Awards

BV Distinguished

Bar Admissions

Massachusetts
Admitted: 1995
U.S. District Court, District of Massachusetts
Admitted: 1997
U.S. Court of Appeals, First Circuit
Admitted: 2006

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