thornton law firm

People Focused. Results Driven.

We are driven by a shared vision of what is right.

We believe in fairness. We hold ourselves and others to the

highest standards. We have a history of successfully

representing our clients that few can match.

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Andrew Wainwright Named Lawyer of the Year

Andrew Wainwright named “Lawyer of the Year” in Mass Tort Litigation/Class Actions-Plaintiffs in Boston by The Best Lawyers in America® 2023. Click below to read more:

Camp Lejeune Water Contamination Lawsuit

Camp Lejeune’s water system was contaminated with volatile organic compounds from 1957 through 1987. If you were diagnosed with an illness related to the Camp Lejeune water contamination issue, you may have a claim for damages. Click below or call the Camp Lejeune lawyers at Thornton Law Firm (888) 491-9726 for a free consult.

PFAS Chemical Exposure Lawsuits

PFAS, the forever chemicals, may cause cancers and birth defects. Call the toxic tort lawyers at Thornton Law Firm at 888-491-9726 or click below for a free consultation.

Mesothelioma lawsuits

For over 40 years, Thornton Law Firm has been a leader in mesothelioma and asbestos litigation. Call 888-632-0108 for a free consultation.

Whistleblower Client Receives Largest-Ever Individual SEC Whistleblower Award

Our client was awarded nearly $50 million after providing original information to the Commission that led to the successful enforcement action against the Bank of New York Mellon. Partner Michael A. Lesser…

Practice Areas

Through four decades of practicing law, we have treated clients with respect and compassion. Listening carefully, responding to all questions, and being accessible when clients call are ways we show our clients that we care.

Birth Defects

At Thornton Law Firm we understand the pain that families face when coping with permanent, life-altering birth defects and the frustration of knowing they could have been prevented.

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Drugs & Medical Devices

Thousands of people each year suffer dangerous side effects and even death caused by prescription and over the counter drugs and medical devices.

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False Claims Act & Fraud

Fraud comes in many forms.  But the intention of every fraud is financial gain by the perpetrator and financial loss for the victim.


For 40 years, Thornton Law Firm LLP has been a leader in mesothelioma and asbestos illness litigation.

Personal Injury

The Massachusetts personal injury lawyers and workers compensation attorneys at Thornton Law Firm LLP understand the impact a devastating injury or illness has on your family.

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Toxic & Environmental Torts

Thornton Law Firm LLP is at the forefront of toxic tort litigation with our lead attorney, David Strouss being named “2017 Environmental Lawyer of the Year” by Lawyer Monthly Magazine.

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PFAS Chemical Exposure Lawsuits

Thornton Law Firm represents thousands of people who have suffered a serious personal injury or illness from exposure to hazardous chemicals and other toxic substances at work or at home.

Massachusetts Attorneys


Thornton Law Firm LLP has a tradition of excellence when it comes to representing victims, whether it be a construction worker injured on the job or a pension fund losing assets to fraud. Our clients are individuals and organizations that have suffered physical, financial, and emotional harm because of another’s negligence or wrongdoing.


Our Main Goal Is Your Satisfaction.

This firm is very helpful and thorough. Andrew Wainwright worked diligently to help my family through a difficult time. He and all the staff took the time required to ensure we understood each step of the process while being very compassionate regarding our situation. I highly recommend them.

Eric C.


The attorneys were very compassionate in dealing with my dad who was suffering from mesothelioma. They came to our home to carry out a deposition and went right to work carrying out justice for him. They have worked diligently to help our family. I would recommend them to anyone looking for a law firm. Everyone I have dealt with was professional and kind.

Deb L.


As a plaintiff, I had the opportunity to partner with Mike Lesser and the Thornton Law Firm on a rather complicated civil case which involved 15 defendants on one side and the federal and state governments with me on the opposite side. I could not have been more favorably impressed and satisfied with Mr. Lesser and his firm’s professionalism, competence and results. I highly recommend him and his firm without reservation.

Richard M.


Get In Touch


Thornton Law Firm was founded in 1978 by Michael Thornton and two other attorneys doing groundbreaking work for victims of mesothelioma and other asbestos-related diseases. Now a leading injury law firm in Massachusetts and one of the largest plaintiff law firms in New England, the firm has 19 attorneys representing thousands of clients in a wide variety of plaintiff-side work.

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Monday 8:30AM-5:30PM
Tuesday 8:30AM-5:30PM
Wednesday 8:30AM-5:30PM
Thursday 8:30AM-5:30PM
Friday 8:30AM-5:30PM
Saturday Closed
Sunday Closed


84 State Street 4th Fl.
Boston, MA 02109
(888) 491-9726
FAX 617-720-2445

9595 Wilshire Blvd., Ste 900
Beverly Hills, CA 90212

201 Columbine St, Suite 300
Denver, CO 80206

(800) 431-4600

Thornton Law Firm LLC, Attorneys At Law