Company lists · Data refreshed September 2026

Top 25 Mass tort law firms based in Boston, United States

Name: Mass tort law firms based in Boston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 48 companies tracked

RevenueBase identified 48 mass tort law firms headquartered in Boston, United States as of September 2026 and tracks 938 professional contacts across them, including 612 with verified work emails. Across the United States, Houston is the largest hub for this category (187 companies); Boston has 48.

This list covers mass tort law firms headquartered in Boston, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

48Companies

938Contacts tracked

612Verified emails

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The 25 largest mass tort law firms based in Boston, United States

Ranked by team size

Top 25 of 48 mass tort law firms based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to mass tort law firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Boyle Shaughnessy LAW	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	137 contacts →
	Partial evidence “Recognized as one of the region's most experienced, reliable and persistent litigation firms, Boyle \| Shaughnessy Law builds confidence with each client by achieving winning…” Source: RevenueBase Database · checked Sep 28, 2026
2	Cetrulo LLP	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	100 contacts →
	Indirect evidence “For over 25 years, our dedicated attorneys have been setting the standard for exceptional representation in liability defense litigation.” Source: RevenueBase Database · checked Sep 28, 2026
3	Campbell Conroy & O'neil, P.C	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	83 contacts →
	Indirect evidence “Recognized both nationally and internationally for delivering results on high stakes, complex litigation throughout the United States, Campbell Conroy & O’Neil, P.C.” Source: RevenueBase Database · checked Sep 28, 2026
4	Cmbg3 LAW	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	75 contacts →
	Partial evidence “CMBG3 Law is a dynamic law firm that litigates, counsels, and navigates its clients through complex legal matters throughout New England, northern and southern California, and a…” Source: RevenueBase Database · checked Sep 28, 2026
5	Altman Nussbaum Shunnarah Trial Attorneys	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	60 contacts →
	Partial evidence “With over 34 years of combined experience under the law firm's belt, Altman Nussbaum Shunnarah Trial Attorneys, P.C.” Source: RevenueBase Database · checked Sep 28, 2026
6	Thornton LAW Firm LLP	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	60 contacts →
	Partial evidence “Thornton Law Firm LLP is one of the largest plaintiff law firms in New England.” Source: RevenueBase Database · checked Sep 28, 2026
7	Sweeney Merrigan Personal Injury Lawyers	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	41 contacts →
	Partial evidence “Sweeney Merrigan Personal Injury Lawyers is a personal injury law firm in Boston comprised of talented attorneys dedicated to getting excellent results for their clients and…” Source: RevenueBase Database · checked Sep 28, 2026
8	Michael Kelly Injury Lawyers	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	39 contacts →
	Partial evidence “Michael Kelly Injury Lawyers is made up of attorneys that are experienced in personal injury law and are trained to help you through your particular set of difficult circumstances.” Source: RevenueBase Database · checked Sep 28, 2026
9	Lubin & Meyer PC	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	37 contacts →
	Partial evidence “THE LEADER IN MEDICAL MALPRACTICE LAW Lubin & Meyer PC is recognized nationally as one of the country’s leading medical malpractice and catastrophic personal injury law firms.” Source: RevenueBase Database · checked Sep 28, 2026
10	Martin, Magnuson, Mccarthy & Kenney	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	36 contacts →
	Partial evidence “Founded in 1957, Martin, Magnuson, McCarthy & Kenney is a mid-sized law firm with extensive civil litigation and appellate experience.” Source: RevenueBase Database · checked Sep 28, 2026
11	Jones Kelleher LLP	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	27 contacts →
	Indirect evidence “The attorneys at Jones Kelleher bring with them more than 200 years of combined legal experience over a broad spectrum of catastrophic personal injury and wrongful death matters.” Source: RevenueBase Database · checked Sep 28, 2026
12	Block & Leviton LLP	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	25 contacts →
	Partial evidence “Block & Leviton LLP is a boutique law firm focused on complex litigation nationwide.” Source: RevenueBase Database · checked Sep 28, 2026
13	Brody Hardoon Perkins & Kesten, LLP Bhpk LAW	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	24 contacts →
	Indirect evidence “When we say "Good People, Great Lawyers," we mean it.” Source: RevenueBase Database · checked Sep 28, 2026
14	Sheff & Cook	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	24 contacts →
	Partial evidence “Sheff & Cook has distinguished itself as a leader in the field of personal injury law and wrongful death cases.” Source: RevenueBase Database · checked Sep 28, 2026
15	Sugarman	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	20 contacts →
	Indirect evidence “Our focus is personal injury trial practice.” Source: RevenueBase Database · checked Sep 28, 2026
16	Crowe & Harris LLP	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “Crowe & Harris, LLP represents victims and families of personal injuries.” Source: RevenueBase Database · checked Sep 28, 2026
17	Shepard O'donnell	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1-10	11 contacts →
	Indirect evidence “When pursuing a claim for personal injury or wrongful death, selecting the right legal professional can make a meaningful difference in your life and in the lives of those you…” Source: RevenueBase Database · checked Sep 28, 2026
18	Peck Trial Attorneys, PC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “Boston's Finest Personal Injury Attorneys” Source: RevenueBase Database · checked Sep 28, 2026
19	Swartz & Swartz P.C. Attorneys At LAW	Indirect evidence	Boston, United StatesHQ checked Sep 28, 2026	11-50	8 contacts →
	Indirect evidence “For decades, the Boston personal injury lawyers at Swartz & Swartz, P.C.” Source: RevenueBase Database · checked Sep 28, 2026
20	Breakstone, White & Gluck, P.C	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1-10	8 contacts →
	Indirect evidence “The Boston, Massachusetts trial attorneys of Breakstone, White & Gluck, P.C.” Source: RevenueBase Database · checked Sep 28, 2026
21	Rights Protection LAW Group, Pllc	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1-10	8 contacts →
	Partial evidence “Rights Protection Law Group, PLLC is a Law Firm focused on consumer protection, located at 8 Faneuil Hall Marketplace, Third Floor, Boston, MA 02109” Source: RevenueBase Database · checked Sep 28, 2026
22	Bergstresser & Pollock PC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1-10	8 contacts →
	Indirect evidence “BERGSTRESSER & POLLOCK PC When someone has been harmed through the fault of another, justice requires they be fairly compensated.” Source: RevenueBase Database · checked Sep 28, 2026
23	Feinberg & Alban, P.C	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1-10	7 contacts →
	Indirect evidence “The Boston firm of Feinberg & Alban, P.C.” Source: RevenueBase Database · checked Sep 28, 2026
24	LAW Offices Of Michael P. Joyce, P.C	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial evidence “The Law Offices of Michael P.” Source: RevenueBase Database · checked Sep 28, 2026
25	Combies Hanson, P.C.	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1-10	6 contacts →
	Indirect evidence “Combies Hanson, P.C.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: mass tort law firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names mass tort law firms.
Partial evidence: Its own public description names part of mass tort law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name mass tort law firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 48 mass tort law firms based in Boston, United States

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Mass tort law firms based in Boston, United States at a glance

As of Sep 28, 2026

65.2%Verified-email coverage

19.5Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for Boston, so it is reported there. Company counts and contact totals on this page are exact for Boston, over 48 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among mass tort law firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Boston, United States whose own description of what they do matches “mass tort law firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names mass tort law firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among mass tort law firms, and records with no verified work email. Companies headquartered outside Boston are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 612 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Mass tort law firms by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names mass tort law firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many mass tort law firms are there based in Boston, United States?

RevenueBase identified 48 mass tort law firms headquartered in Boston, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Boyle Shaughnessy LAW, headquartered in Boston, tops this list with the largest team on record.

Which city in the United States has the most mass tort law firms?

Houston leads the United States with 187 headquartered companies, followed by Chicago (167) and New York (163). Boston has 48.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 612 verified decision-maker contacts tracked across these 48 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.