Company lists · Data verified August 2026

Top 25 Clinical trial staffing based in the United States

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 1,132 companies tracked

There are 1,132 clinical trial staffing headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 46,475 professional contacts across them, including 19,904 with verified work emails and 11,794 with mobile numbers. Miami is the largest hub.

This list covers clinical trial staffing headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

1,132Companies

46,475Contacts tracked

19,904Verified emails

11,794Mobile numbers

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The 25 largest clinical trial staffing based in the United States

Ranked by team size

Top 25 of 1,132 clinical trial staffing based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Fortrea	Research Triangle Park, NC	10001+	10,753	5,357
2	Worldwide Clinical Trials	Research Triangle Park, NC	1,001-5,000	3,481	2,118
3	Precision For Medicine	Cambridge, MA	1,001-5,000	1,763	1,200
4	Lambda Therapeutic Research	Las Vegas, NV	1,001-5,000	1,229	399
5	Suvoda	Portland, OR	1,001-5,000	1,223	963
6	Planet Pharma	Raleigh, NC	1,001-5,000	1,082	99
7	Navitas Life Sciences	Gaithersburg, MD	1,001-5,000	991	275
8	Velocity Clinical Research, INC	Grants Pass, OR	1,001-5,000	961	683
9	Cenexel	Berlin, NJ	1,001-5,000	843	32
10	Caidya	Raleigh, NC	1,001-5,000	749	537
11	RHO	Durham, NC	501-1,000	723	565
12	DM Clinical Research	Philadelphia, PA	501-1,000	586	39
13	Accelerated Enrollment Solutions	Horsham, PA	1,001-5,000	565	117
14	Catalyst Clinical Research	Wilmington, NC	1,001-5,000	524	294
15	Raptim Research Pvt. LTD	Princeton, NJ	201-500	474	3
16	Veramed	Boston Masachuesettes, MA	501-1,000	432	328
17	Sitero	Coral Gables, FL	501-1,000	388	201
18	WEP Clinical	Cary, NC	201-500	319	207
19	Flourish Research	Northridge, CA	501-1,000	312	202
20	Science 37	Morrisville, NC	201-500	297	99
21	Technical Resources International, INC	Bethesda, MD	201-500	296	158
22	PCM Trials	Denver, CO	1,001-5,000	261	172
23	Execupharm	King Of Prussia, PA	10001+	231	71
24	Canopy Life Sciences	Danbury, CT	201-500	230	130
25	Klinera Global Services	San Jose, CA	201-500	229	3

Showing 25 of 1,132 clinical trial staffing based in the United States

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Clinical trial staffing based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

MiamiLargest hub · 34 HQs

11,794Contacts with mobile numbers

106Emails re-verified in last 30 days

Companies by employee count

1-10

481

11-50

406

51-200

159

201-500

501-1,000

1,001-5,000

10001+

Clinical trial staffing by metro

Metro	Companies
Clinical trial staffing in Miami	34
Clinical trial staffing in Boston	24
Clinical trial staffing in Houston	24
Clinical trial staffing in New York	24
Clinical trial staffing in Raleigh	24
Clinical trial staffing in San Diego	23
Clinical trial staffing in Atlanta	21
Clinical trial staffing in Princeton	20

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “clinical trial staffing”, with match quality audited by blind human judging, and headquartered in the United States.
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: Contact records re-verify on a rolling cadence; 106 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many clinical trial staffing are there based in the United States?

There are 1,132 clinical trial staffing headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Fortrea, headquartered in Research Triangle Park, tops this list with the largest team on record.

Which city has the most clinical trial staffing?

Miami leads with 34 headquartered companies, followed by Boston (24) and Houston (24).

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 19,904 verified decision-maker contacts tracked across these 1,132 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.