Company lists · Data refreshed September 2026

Top 25 Pharmaceutical testing companies based in the United States

Name: Pharmaceutical testing companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 565 companies tracked

RevenueBase identified 565 pharmaceutical testing companies headquartered in the United States as of September 2026 and tracks 64,441 professional contacts across them, including 24,194 with verified work emails. San Diego is the largest hub.

This list covers pharmaceutical testing companies 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 17, 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 17, 2026 86% judged on-target in blind review

565Companies

64,441Contacts tracked

24,194Verified emails

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The 25 largest pharmaceutical testing companies based in the United States

Ranked by team size

Top 25 of 565 pharmaceutical testing companies based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to pharmaceutical testing companies: 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	Labcorp	Indirect evidence	Burlington, NC, United StatesHQ checked Sep 17, 2026	10001+	38,427 contacts →
	Indirect evidence “Clear and confident health care decisions begin with questions.” Source: RevenueBase Database · checked Sep 17, 2026
2	Eurofins Lancaster Laboratories	Partial evidence	Lancaster, PA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,638 contacts →
	Partial evidence “Eurofins Lancaster Laboratories is one of the largest commercial contract laboratories in the world providing comprehensive laboratory services in the pharmaceutical…” Source: RevenueBase Database · checked Sep 17, 2026
3	Bioagilytix	Partial evidence	Durham, NC, United StatesHQ checked Sep 17, 2026	1,001-5,000	915 contacts →
	Partial 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 17, 2026
4	Nelson Labs	Strong evidence	Salt Lake City, UT, United StatesHQ checked Sep 17, 2026	501-1,000	775 contacts →
	Strong evidence “Nelson Labs is a global leader in microbiological and analytical chemistry testing and advisory services for the medical device and pharmaceutical industries.” Source: RevenueBase Database · checked Sep 17, 2026
5	Frontage Laboratories, INC	Indirect evidence	Exton, PA, United StatesHQ checked Sep 17, 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 17, 2026
6	Fisher Clinical Services	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 17, 2026	10001+	611 contacts →
	Indirect evidence “Thermo Fisher Scientific provides industry-leading pharma services solutions for drug development, clinical trial logistics, and commercial manufacturing to customers through our…” Source: RevenueBase Database · checked Sep 17, 2026
7	Labconnect	Indirect evidence	Durham, NC, United StatesHQ checked Sep 17, 2026	501-1,000	610 contacts →
	Indirect evidence “LabConnect is a global central laboratory services and clinical trial sample solutions partner, integrating and optimizing sample-related activities across the study lifecycle…” Source: RevenueBase Database · checked Sep 17, 2026
8	QPS Holdings, LLC	Indirect evidence	Newark, DE, United StatesHQ checked Sep 17, 2026	1,001-5,000	592 contacts →
	Indirect evidence “QPS is a GLP/GCP-compliant contract research organization (CRO) delivering the highest grade of discovery, preclinical, and clinical drug development services.” Source: RevenueBase Database · checked Sep 17, 2026
9	Microbac Laboratories, INC	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 17, 2026	501-1,000	494 contacts →
	Indirect evidence “Companies of all sizes partner with Microbac to test the quality, safety, and performance of their products and operations.” Source: RevenueBase Database · checked Sep 17, 2026
10	ACM Global Laboratories	Partial evidence	Rochester, NY, United StatesHQ checked Sep 17, 2026	1,001-5,000	446 contacts →
	Partial evidence “ACM Global Laboratories, an affiliate of Rochester Regional Health in Rochester, New York, is a recognized leader global clinical trial testing services.” Source: RevenueBase Database · checked Sep 17, 2026
11	Sunrise Medical Laboratories	Indirect evidence	Hicksville, NY, United StatesHQ checked Sep 17, 2026	501-1,000	350 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
12	Kcas BIO	Indirect evidence	Olathe, KS, United StatesHQ checked Sep 17, 2026	201-500	347 contacts →
	Indirect evidence “KCAS Bio is a top-tier contract research organization (CRO) that has 45 years of experience with both large pharma and biotech sponsors, providing comprehensive bioanalytical drug…” Source: RevenueBase Database · checked Sep 17, 2026
13	Pathology Laboratories, INC	Indirect evidence	Toledo, OH, United StatesHQ checked Sep 17, 2026	201-500	312 contacts →
	Indirect evidence “Established in Toledo, Ohio in 1946, Pathology Laboratories, Inc.(PathLabs) fostered a reputation among the area’s private medical practitioners as a provider of prompt, reliable…” Source: RevenueBase Database · checked Sep 17, 2026
14	Certified Laboratories, INC	Indirect evidence	Melville, NY, United StatesHQ checked Sep 17, 2026	1,001-5,000	287 contacts →
	Indirect evidence “As part of Certified Group, Certified Laboratories partners with customers to deliver innovative scientific solutions and expertise – So The World Can Trust In What It Consumes™.” Source: RevenueBase Database · checked Sep 17, 2026
15	ARL BIO Pharma	Strong evidence	Oklahoma City, OK, United StatesHQ checked Sep 17, 2026	201-500	286 contacts →
	Strong evidence “ARL Bio Pharma is a contract laboratory that provides analytical and microbiological testing for the pharmaceutical industry.” Source: RevenueBase Database · checked Sep 17, 2026
16	BA Sciences	Partial evidence	Salem, NH, United StatesHQ checked Sep 17, 2026	201-500	257 contacts →
	Partial evidence “Since its founding in 1987, BA Sciences has been a trusted provider of high-quality analytical testing services to life science companies worldwide.” Source: RevenueBase Database · checked Sep 17, 2026
17	Deibel Laboratories	Indirect evidence	Niles, IL, United StatesHQ checked Sep 17, 2026	201-500	242 contacts →
	Indirect evidence “Deibel Laboratories started in 1967 by Dr.” Source: RevenueBase Database · checked Sep 17, 2026
18	Gravity Diagnostics	Indirect evidence	Covington, KY, United StatesHQ checked Sep 17, 2026	201-500	238 contacts →
	Indirect evidence “We are an advocate for physicians and patients, supporting them with unsurpassed integrity, regulatory compliance, and clinical expertise.” Source: RevenueBase Database · checked Sep 17, 2026
19	Precision Diagnostics	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	501-1,000	235 contacts →
	Indirect evidence “Precision Diagnostics is the only U.S.” Source: RevenueBase Database · checked Sep 17, 2026
20	Pace Analytical	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 17, 2026	1,001-5,000	231 contacts →
	Indirect evidence “Watch our video on the history and culture of Pace at https://goo.gl/L3ruD3 or get a more detailed look through our company brochure at https://goo.gl/feMDwU!” Source: RevenueBase Database · checked Sep 17, 2026
21	Halo Pharmaceutical, INC	Partial evidence	Whippany, NJ, United StatesHQ checked Sep 17, 2026	201-500	219 contacts →
	Partial evidence “Halo Pharma is a leading provider of pharmaceutical services, including contract dosage form development, commercial manufacturing, and analytical services.” Source: RevenueBase Database · checked Sep 17, 2026
22	Medtox Laboratories	Partial evidence	New Brighton, MN, United StatesHQ checked Sep 17, 2026	501-1,000	215 contacts →
	Partial evidence “MEDTOX Laboratories contains a full-service clinical laboratory as well as a SAMHSA-certified drug testing laboratory.” Source: RevenueBase Database · checked Sep 17, 2026
23	RJ LEE Group	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 17, 2026	201-500	194 contacts →
	Partial evidence “RJ Lee Group provides comprehensive laboratory testing and scientific consulting services.” Source: RevenueBase Database · checked Sep 17, 2026
24	IIT Research Institute Iitri	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	188 contacts →
	Indirect evidence “IITRI was founded in 1936 as the research arm of the Illinois Institute of Technology (IIT).” Source: RevenueBase Database · checked Sep 17, 2026
25	Quality Chemical Laboratories	Indirect evidence	Wilmington, NC, United StatesHQ checked Sep 17, 2026	201-500	177 contacts →
	Indirect evidence “QCL is science driven, quality focused, and responsive.” Source: RevenueBase Database · checked Sep 17, 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: pharmaceutical testing companies. 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 pharmaceutical testing companies.
Partial evidence: Its own public description names part of pharmaceutical testing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name pharmaceutical testing companies. 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 565 pharmaceutical testing companies based in the United States

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Pharmaceutical testing companies based in the United States at a glance

As of Sep 17, 2026

37.5%Verified-email coverage

114.1Average contacts per company

11-50Median size (employees)

2.5%Largest-city concentration · San Diego

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

181

11-50

226

51-200

105

201-500

501-1,000

1,001-5,000

5,001-10,000

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 565 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 pharmaceutical testing companies, 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 “pharmaceutical testing companies”. 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 pharmaceutical testing companies), 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 pharmaceutical testing companies, 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, 24,194 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 17, 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.

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 pharmaceutical testing companies, 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 pharmaceutical testing companies are there based in the United States?

RevenueBase identified 565 pharmaceutical testing companies 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?

Labcorp, headquartered in Burlington, tops this list with the largest team on record.

Which city has the most pharmaceutical testing companies?

San Diego leads with 14 headquartered companies, followed by Irvine (10) and Houston (9).

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 24,194 verified decision-maker contacts tracked across these 565 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 17, 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.