Company lists · Data refreshed September 2026

Top 25 Contract laboratory services based in the United States

Name: Contract laboratory services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 1,789 companies tracked

RevenueBase identified 1,789 contract laboratory services headquartered in the United States as of September 2026 and tracks 280,943 professional contacts across them, including 87,688 with verified work emails. Houston is the largest hub.

This list covers contract laboratory services 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 19, 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 19, 2026 86% judged on-target in blind review

1,789Companies

280,943Contacts tracked

87,688Verified emails

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The 25 largest contract laboratory services based in the United States

Ranked by team size

Top 25 of 1,789 contract laboratory services based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to contract laboratory services: 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	Thermo Fisher Scientific	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 19, 2026	10001+	70,907 contacts →
	Indirect evidence “About Thermo Fisher Scientific Thermo Fisher Scientific Inc.” Source: RevenueBase Database · checked Sep 19, 2026
2	Agilent Technologies	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 19, 2026	10001+	48,455 contacts →
	Indirect evidence “Agilent customers are finding new ways to treat cancer, ensure food, water, air, and medicine quality and safety, discover new drug treatments, research infectious diseases, and…” Source: RevenueBase Database · checked Sep 19, 2026
3	Labcorp	Indirect evidence	Burlington, NC, United StatesHQ checked Sep 19, 2026	10001+	38,427 contacts →
	Indirect evidence “Clear and confident health care decisions begin with questions.” Source: RevenueBase Database · checked Sep 19, 2026
4	Quest Diagnostics	Indirect evidence	Secaucus, NJ, United StatesHQ checked Sep 19, 2026	10001+	27,884 contacts →
	Indirect evidence “Quest Diagnostics (NYSE: DGX) empowers people to take action to improve health outcomes.” Source: RevenueBase Database · checked Sep 19, 2026
5	Waters Corporation	Indirect evidence	Milford, MA, United StatesHQ checked Sep 19, 2026	10001+	8,189 contacts →
	Indirect evidence “Waters Corporation (NYSE: WAT) is a global leader in life sciences and diagnostics, dedicated to accelerating the benefits of pioneering science through analytical technologies…” Source: RevenueBase Database · checked Sep 19, 2026
6	IDEXX	Indirect evidence	Westbrook, ME, United StatesHQ checked Sep 19, 2026	10001+	6,962 contacts →
	Indirect evidence “people, one global focus - enhancing the health and well-being of pets, people, and livestock We are passionate about what we do at IDEXX – and why wouldn’t we be?” Source: RevenueBase Database · checked Sep 19, 2026
7	Perkinelmer	Indirect evidence	Shelton, CT, United StatesHQ checked Sep 19, 2026	5,001-10,000	5,229 contacts →
	Indirect evidence “For 85 years, PerkinElmer has pushed the boundaries of science in our food, industrial, life science and environmental markets.” Source: RevenueBase Database · checked Sep 19, 2026
8	Pace Analytical Services	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,228 contacts →
	Indirect evidence “Pace® Science and Technology Company makes the world a safer, healthier place.” Source: RevenueBase Database · checked Sep 19, 2026
9	Clinisys	Partial evidence	Uk, AZ, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,878 contacts →
	Partial evidence “Clinisys acquired Orchard Software July 2025 (see press release https://tinyurl.com/clinisysnews)* Clinisys delivers over 45 years of laboratory informatics expertise – built…” Source: RevenueBase Database · checked Sep 19, 2026
10	Eurofins Lancaster Laboratories	Strong evidence	Lancaster, PA, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,638 contacts →
	Strong 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 19, 2026
11	Bioreference	Partial evidence	Elmwood Park, NJ, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,610 contacts →
	Partial evidence “For more than four decades, BioReference has built a legacy based on scientific excellence, innovation and world-class service in laboratory testing solutions.” Source: RevenueBase Database · checked Sep 19, 2026
12	Clinical Pathology Laboratories	Partial evidence	Austin, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,528 contacts →
	Partial evidence “Clinical Pathology Laboratories (CPL) is a medically-led company dating back to 1948.” Source: RevenueBase Database · checked Sep 19, 2026
13	Examone, A Quest Diagnostics Company	Partial evidence	Lenexa, KS, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,369 contacts →
	Partial evidence “ExamOne has provided a robust portfolio of laboratory, paramedical and data solutions since 1972, giving it a great deal of understanding about the needs of life insurance and…” Source: RevenueBase Database · checked Sep 19, 2026
14	Q Solutions	Partial evidence	Durham, NC, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,291 contacts →
	Partial evidence “Q² Solutions is now IQVIA Laboratories.” Source: RevenueBase Database · checked Sep 19, 2026
15	Mérieux Nutrisciences	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,262 contacts →
	Indirect evidence “Mérieux NutriSciences is a global food safety and quality partner, offering testing, labeling, auditing, consulting, sensory, training and research services to the food &…” Source: RevenueBase Database · checked Sep 19, 2026
16	Sonora Quest Laboratories Laboratory Sciences Of Arizona	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,222 contacts →
	Partial evidence “Sonora Quest Laboratories, a subsidiary of Laboratory Sciences of Arizona, is an Arizona-based joint venture between Banner Health and Quest Diagnostics (NYSE: DGX) that makes up…” Source: RevenueBase Database · checked Sep 19, 2026
17	Bioagilytix	Partial evidence	Durham, NC, United StatesHQ checked Sep 19, 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 19, 2026
18	Nelson Labs	Indirect evidence	Salt Lake City, UT, United StatesHQ checked Sep 19, 2026	501-1,000	775 contacts →
	Indirect 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 19, 2026
19	Emsl Analytical, INC	Partial evidence	Cinnaminson, NJ, United StatesHQ checked Sep 19, 2026	501-1,000	719 contacts →
	Partial evidence “As the nation's leading environmental testing firm, EMSL's network of nationwide laboratories has been providing quality analytical services since 1981.” Source: RevenueBase Database · checked Sep 19, 2026
20	Aegis Sciences Corporation	Partial evidence	Nashville, TN, United StatesHQ checked Sep 19, 2026	501-1,000	690 contacts →
	Partial evidence “Founded in 1990, Aegis Sciences Corporation is a forensic toxicology and healthcare laboratory that provides science-driven drug testing and consulting services based in…” Source: RevenueBase Database · checked Sep 19, 2026
21	Tricore Reference Laboratories	Partial evidence	Albuquerque, NM, United StatesHQ checked Sep 19, 2026	1,001-5,000	675 contacts →
	Partial evidence “TriCore is a community-based, independent, clinical reference laboratory that provides full-service, state-of-the-art laboratory tests to health care professionals and their…” Source: RevenueBase Database · checked Sep 19, 2026
22	IEH Laboratories And Consulting Group	Indirect evidence	Lake Forest Park, WA, United StatesHQ checked Sep 19, 2026	1,001-5,000	651 contacts →
	Indirect evidence “IEH is an international lab & consulting services company, offering a comprehensive portfolio of lab testing services and consultation across multiple industries.” Source: RevenueBase Database · checked Sep 19, 2026
23	Solstas LAB Partners	Partial evidence	Greensboro, NC, United StatesHQ checked Sep 19, 2026	1,001-5,000	649 contacts →
	Partial evidence “Solstas Lab Partners has become one of the nation’s fastest-growing and largest full-service laboratories because we understand that our business is more than just test results.” Source: RevenueBase Database · checked Sep 19, 2026
24	Eurofins EAG Laboratories	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1,001-5,000	632 contacts →
	Indirect evidence “When it comes to understanding the physical structure, chemical properties and performance of advanced materials and integrated circuitry, no other scientific services company…” Source: RevenueBase Database · checked Sep 19, 2026
25	Alverno Laboratories	Partial evidence	Hammond, IN, United StatesHQ checked Sep 19, 2026	1,001-5,000	619 contacts →
	Partial evidence “Alverno Laboratories manages 32 hospital laboratories and provides laboratory services to two free standing emergency departments and thousands of physician offices and other…” Source: RevenueBase Database · checked Sep 19, 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: contract laboratory services. 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 contract laboratory services.
Partial evidence: Its own public description names part of contract laboratory services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name contract laboratory services. 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 1,789 contract laboratory services based in the United States

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Contract laboratory services based in the United States at a glance

As of Sep 19, 2026

31.2%Verified-email coverage

157.0Average contacts per company

11-50Median size (employees)

2.5%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

620

11-50

682

51-200

315

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 1,789 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 contract laboratory services, 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 “contract laboratory services”. 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 contract laboratory services), 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 contract laboratory services, 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, 87,688 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 19, 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.

Contract laboratory services by metro

Contract laboratory services in Houston44

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 contract laboratory services, 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 contract laboratory services are there based in the United States?

RevenueBase identified 1,789 contract laboratory services 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?

Thermo Fisher Scientific, headquartered in Waltham, tops this list with the largest team on record.

Which city has the most contract laboratory services?

Houston leads with 44 headquartered companies, followed by San Diego (24) and Irvine (19).

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 87,688 verified decision-maker contacts tracked across these 1,789 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 19, 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.