Company lists · Data refreshed September 2026

Top 25 Clinical trial law firms based in the United States

Name: Clinical trial law firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 2,596 companies tracked

RevenueBase identified 2,596 clinical trial law firms headquartered in the United States as of September 2026 and tracks 71,693 professional contacts across them, including 35,415 with verified work emails. Houston is the largest hub.

This list covers clinical trial law firms headquartered in the 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 27, 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 27, 2026 86% judged on-target in blind review

2,596Companies

71,693Contacts tracked

35,415Verified emails

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The 25 largest clinical trial law firms based in the United States

Ranked by team size

Top 25 of 2,596 clinical trial law firms based in the United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to clinical trial 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	PPD	Partial evidence	Waltham, MA, United StatesHQ checked Sep 27, 2026	10001+	20,530 contacts →
	Partial evidence “The PPD™ clinical research business of Thermo Fisher Scientific, the world leader in serving science, enables customers to accelerate innovation and drug development through…” Source: RevenueBase Database · checked Sep 27, 2026
2	Premier Research	Partial evidence	Morrisville, NC, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,584 contacts →
	Partial evidence “Premier Research International LLC (Premier) is a global leader in clinical research and consulting services with expertise in driving an efficient and effective path to market…” Source: RevenueBase Database · checked Sep 27, 2026
3	Propharma	Indirect evidence	Raleigh, NC, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,079 contacts →
	Indirect evidence “At ProPharma, we help pharmaceutical, biotechnology, and medical device companies bring life-changing therapies to market.” Source: RevenueBase Database · checked Sep 27, 2026
4	WCG	Partial evidence	Cary, NC, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,103 contacts →
	Partial evidence “WCG is a true partner to research sponsors, CROs, sites and participants in navigating the clinical research journey.” Source: RevenueBase Database · checked Sep 27, 2026
5	CTI Clinical Trial And Consulting Services	Strong evidence	Covington, KY, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,043 contacts →
	Strong evidence “CTI Clinical Trial and Consulting Services is a global, privately held, research service organization, delivering a complete spectrum of clinical trial and consulting services…” Source: RevenueBase Database · checked Sep 27, 2026
6	Navitas Life Sciences	Partial evidence	Gaithersburg, MD, United StatesHQ checked Sep 27, 2026	1,001-5,000	990 contacts →
	Partial evidence “Navitas Life Sciences is a global Clinical Research partner with over 35 years of expertise in Clinical, Regulatory, Safety, and Data Management solutions.” Source: RevenueBase Database · checked Sep 27, 2026
7	EMMES	Strong evidence	Rockville, MD, United StatesHQ checked Sep 27, 2026	1,001-5,000	961 contacts →
	Strong evidence “Emmes is a Contract Research Organization delivering complex clinical trials through therapeutic expertise, scientific rigor, and technology-enabled execution.” Source: RevenueBase Database · checked Sep 27, 2026
8	Bioagilytix	Indirect evidence	Durham, NC, United StatesHQ checked Sep 27, 2026	1,001-5,000	915 contacts →
	Indirect evidence “BioAgilytix is a leading global contract research organization focused on supporting pharmaceutical and biotech partners in all phases of drug development.” Source: RevenueBase Database · checked Sep 27, 2026
9	Caidya	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 27, 2026	1,001-5,000	758 contacts →
	Partial evidence “Caidya is a multi-therapeutic clinical research organization (CRO) serving innovators worldwide.” Source: RevenueBase Database · checked Sep 27, 2026
10	Frontage Laboratories, INC	Indirect evidence	Exton, PA, United StatesHQ checked Sep 27, 2026	1,001-5,000	727 contacts →
	Indirect evidence “Frontage Laboratories is a US-based Contract Research Organization (CRO) that was initially established in New Jersey in April 2001 and later relocated to Pennsylvania in 2004.” Source: RevenueBase Database · checked Sep 27, 2026
11	Thomas J. Henry LAW	Indirect evidence	Corpus Christi, TX, United StatesHQ checked Sep 27, 2026	201-500	696 contacts →
	Indirect evidence “Thomas J.” Source: RevenueBase Database · checked Sep 27, 2026
12	Bowman And Brooke	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 27, 2026	501-1,000	537 contacts →
	Partial evidence “Bowman and Brooke LLP is a nationally recognized trial firm with one of the largest product liability practices in the country.” Source: RevenueBase Database · checked Sep 27, 2026
13	Chiltern	Indirect evidence	Durham, NC, United StatesHQ checked Sep 27, 2026	10001+	532 contacts →
	Indirect evidence “THIS PAGE IS NOT MONITORED.” Source: RevenueBase Database · checked Sep 27, 2026
14	Weitz & Luxenberg PC	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	201-500	530 contacts →
	Partial evidence “Weitz & Luxenberg is New York City’s largest personal injury and mass-tort plaintiffs’ law firm.” Source: RevenueBase Database · checked Sep 27, 2026
15	Motley Rice	Indirect evidence	Mt. Pleasant, SC, United StatesHQ checked Sep 27, 2026	201-500	423 contacts →
	Indirect evidence “Our History Makes Us Bold.” Source: RevenueBase Database · checked Sep 27, 2026
16	Sitero	Partial evidence	Coral Gables, FL, United StatesHQ checked Sep 27, 2026	501-1,000	389 contacts →
	Partial evidence “Sitero is a next-generation, site-focused clinical research organization (CRO) for life sciences and institutional research organizations that helps get treatments to market safer…” Source: RevenueBase Database · checked Sep 27, 2026
17	Susman Godfrey LLP	Indirect evidence	Houston, TX, United StatesHQ checked Sep 27, 2026	201-500	387 contacts →
	Indirect evidence “Susman Godfrey is America’s premier litigation boutique.” Source: RevenueBase Database · checked Sep 27, 2026
18	Veristat	Strong evidence	Southborough, MA, United StatesHQ checked Sep 27, 2026	501-1,000	367 contacts →
	Strong evidence “Veristat is the science-first full-service drug and biologic CRO and consultancy that integrates strategic planning, regulatory expertise, and clinical trial execution to rapidly…” Source: RevenueBase Database · checked Sep 27, 2026
19	Rubenstein LAW	Partial evidence	Miami, FL, United StatesHQ checked Sep 27, 2026	201-500	344 contacts →
	Partial evidence “Rubenstein Law has been getting justice for personal injury victims since 1988.” Source: RevenueBase Database · checked Sep 27, 2026
20	Techsol Life Sciences	Partial evidence	Princeton, NJ, United StatesHQ checked Sep 27, 2026	201-500	294 contacts →
	Partial evidence “Techsol Life Sciences is an integrated clinical development, medical affairs and post-marketing surveillance business solutions provider to global biopharmaceutical, medical…” Source: RevenueBase Database · checked Sep 27, 2026
21	Alexander Shunnarah Trial Attorneys	Strong evidence	Birmingham, AL, United StatesHQ checked Sep 27, 2026	51-200	289 contacts →
	Strong evidence “Alexander Shunnarah Trial Attorneys is a premier Birmingham personal injury law firm started by Alexander Shunnarah.” Source: RevenueBase Database · checked Sep 27, 2026
22	Weinberg Wheeler Hudgins Gunn & Dial	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 27, 2026	201-500	264 contacts →
	Partial evidence “Fueled by the steadfast commitment of our loyal clients, WWHGD lawyers have dedicated themselves to a vision of creating a powerhouse national trial firm.” Source: RevenueBase Database · checked Sep 27, 2026
23	Swanson, Martin & Bell, LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 27, 2026	201-500	254 contacts →
	Partial evidence “Swanson, Martin & Bell, LLP was founded in 1992 by a group of trial lawyers who left a large Chicago firm to better serve the needs of their clients.” Source: RevenueBase Database · checked Sep 27, 2026
24	Valsource INC	Indirect evidence	Downingtown, PA, United StatesHQ checked Sep 27, 2026	201-500	245 contacts →
	Indirect evidence “Since 1996, ValSource has worked with hundreds of pharmaceutical, biopharma, and medical device organizations around the world.” Source: RevenueBase Database · checked Sep 27, 2026
25	Wheeler Trigg O'donnell LLP	Partial evidence	Denver, CO, United StatesHQ checked Sep 27, 2026	201-500	231 contacts →
	Partial evidence “Wheeler Trigg O’Donnell lawyers have taken more than 1,300 trials, arbitrations, and appeals to verdict, award, or opinion in 45 states and Washington, D.C, with exceptional…” Source: RevenueBase Database · checked Sep 27, 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: clinical trial 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 clinical trial law firms.
Partial evidence: Its own public description names part of clinical trial law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name clinical trial 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 2,596 clinical trial law firms based in the United States

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Clinical trial law firms based in the United States at a glance

As of Sep 27, 2026

49.4%Verified-email coverage

27.6Average contacts per company

1-10Median size (employees)

3.7%Largest-city concentration · Houston

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

1,402

11-50

858

51-200

257

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 2,596 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 clinical trial 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 the United States whose own description of what they do matches “clinical trial 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 clinical trial 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 clinical trial law firms, and records with no verified work email. Companies headquartered outside United States 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, 35,415 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 27, 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.

Clinical trial law firms by metro

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 clinical trial 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 clinical trial law firms are there based in the United States?

RevenueBase identified 2,596 clinical trial law firms headquartered in the 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?

PPD, headquartered in Waltham, tops this list with the largest team on record.

Which city has the most clinical trial law firms?

Houston leads with 95 headquartered companies, followed by Chicago (77) and New York (75).

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 35,415 verified decision-maker contacts tracked across these 2,596 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 27, 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.