Company lists · Data refreshed October 2026

Top 19 Chemical contract research organizations based in Houston, United States

RevenueBase identified 35 company matches for chemical contract research organizations associated with Houston, United States as of October 2026 and tracks 1,351 professional contacts across them, including 355 with verified work emails. Across the United States, San Diego is the largest hub for this category (75 companies); Houston follows with 35.

This list covers company matches for chemical contract research organizations associated with Houston, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 9, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 9, 2026 How this list was built
35Companies
1,351Contacts tracked
355Verified emails
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The 19 largest chemical contract research organizations based in Houston, United States

Ranked by team size
Top 19 of 35 company matches for chemical contract research organizations based in Houston, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 9, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchHouston, TX, United StatesHQ recorded Oct 9, 2026501-1,000568 contacts →

Exact match

“Pharm-Olam is now Allucent.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
2Exact matchHouston, TX, United StatesHQ recorded Oct 9, 202651-200126 contacts →

Exact match

“Eagle Analytical is an FDA- and DEA-registered, A2LA ISO 17025-accredited laboratory that provides analytical chemistry, microbiological testing, consulting, and technical…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
3Exact matchHouston, TX, United StatesHQ recorded Oct 9, 202651-20093 contacts →

Exact match

“Synsus Private Label Partners is a leading U.S.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
4Exact matchHouston, TX, United StatesHQ recorded Oct 9, 202651-20062 contacts →

Exact match

“MedSource, now part of Ergomed, is an award-winning clinical research organization (CRO) that delivers high-quality clinical trials through strong relationships and specializes in…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
5Exact matchHouston, TX, United StatesHQ recorded Oct 9, 2026201-50058 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
6Exact matchHouston, TX, United StatesHQ recorded Oct 9, 202651-20058 contacts →

Exact match

“Avance Biosciences is a leading Contract Research Organization (CRO) and Contract Testing Organization (CTO) providing CGMP and GLP-compliant analytical and bioanalytical services…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
7Exact matchHouston, TX, United StatesHQ recorded Oct 9, 202651-20048 contacts →

Exact match

“Proxima CRO works with the new class of rising stars in drugs, devices, diagnostics and digital therapeutics.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
8Exact matchHouston, TX, United StatesHQ recorded Oct 9, 2026n/a35 contacts →

Exact match

“Clinical Trial Network offers quality medical attention to the Houston area, while gathering data to generate industry-leading clinical research to pharmaceutical, bio-technology…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
9Exact matchHouston, TX, United StatesHQ recorded Oct 9, 202651-20022 contacts →

Exact match

“CEBIS, a full-service CRO headquartered in Houston, Texas, will provide a comprehensive integrated solution for clinical research (including start-up to CSR, phase I to IV)…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
10Exact matchHouston, TX, United StatesHQ recorded Oct 9, 202611-5012 contacts →

Exact match

“HGI Clinical is a relationship focused CRO with not only a wide range of therapeutic experience, but also experience with investigational product types, study designs and…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
11Exact matchHouston, TX, United StatesHQ recorded Oct 9, 202611-5012 contacts →

Exact match

“K2bio is a Preclinical Contract Research Organization (CRO) located in Houston Texas.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
12Exact matchHouston, TX, United StatesHQ recorded Oct 9, 202611-507 contacts →

Exact match

“As a boutique CRO, Trialwise partners with a limited number of clients, primarily referrals and long-standing sponsors, to ensure our team delivers the quality, personal…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
13Exact matchHouston, TX, United StatesHQ recorded Oct 9, 2026201-5005 contacts →

Exact match

“DuoKem is a USA chemical company.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14Exact matchHouston, TX, United StatesHQ recorded Oct 9, 202651-2004 contacts →

Exact match

“For over two decades, Exim-Indis has been at the forefront of chemical innovation – developing smarter, more efficient solutions for the pharmaceutical, biotechnology, industrial…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15Exact matchHouston, TX, United StatesHQ recorded Oct 9, 20261-103 contacts →

Exact match

“At Accelsobio we understand that emerging Biotech & MedTech companies have unique needs, and one-size-fits-all solutions won't cut it.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16Exact matchHouston, TX, United StatesHQ recorded Oct 9, 20261-103 contacts →

Exact match

“Welcome to Advanced Organic Synthesis (AO Synthesis; AOS).”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17Exact matchHouston, TX, United StatesHQ recorded Oct 9, 20261-102 contacts →

Exact match

“Introducing Etcetera BioProcess Services, LLC: Serving the biopharmaceutical, biotechnology, biologics and supporting industries by providing quality contract and consulting…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18Exact matchHouston, TX, United StatesHQ recorded Oct 9, 20261-102 contacts →

Exact match

“Concordia Chemical was founded in 2003 to provide an easy all-in-one solution for chemical purchasing.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19Exact matchHouston, TX, United StatesHQ recorded Oct 9, 20261-102 contacts →

Exact match

“CliniCore International (“CliniCore”) is a value and mission-driven organization with a wealth of domestic and international experience in clinical research.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase

Showing 19 of 35 chemical contract research organizations based in Houston, United States

See the full list, filter by size, metro and specialty, and access 355 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Chemical contract research organizations based in Houston, United States at a glance

As of Oct 9, 2026
26.3%Verified-email coverage
38.6Average contacts per company
11-50Median size (employees)
Oct 9, 2026Page data refreshed

Companies by employee count

1-10
16
11-50
5
51-200
10
201-500
2
501-1,000
2

Email recency for this list is measured across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 35 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Houston, United States whose business descriptions match “chemical contract research organizations” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 355 professional contacts with verified work emails across the full matched dataset. 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 October 9, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “chemical contract research organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many chemical contract research organizations are there based in Houston, United States?

RevenueBase identified 35 company matches for chemical contract research organizations associated with Houston, United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Pharm-Olam, LLC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most chemical contract research organizations?

San Diego leads the United States with 75 company records, followed by Houston (35) and Boston (28).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 355 professional contacts with verified work emails tracked across these 35 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 9, 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 SmartSearch, 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.