Company lists · Data refreshed September 2026
Top 25 Companion diagnostic developers based in the United States
RevenueBase identified 310 companion diagnostic developers headquartered in the United States as of September 2026 and tracks 14,904 professional contacts across them, including 7,750 with verified work emails. San Diego is the largest hub.
This list covers companion diagnostic developers 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.
The 25 largest companion diagnostic developers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,718 contacts → | ||||
Partial evidence “Myriad Genetics is a leading molecular diagnostic testing and precision medicine company dedicated to advancing health and well-being for all.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,747 contacts → | ||||
Partial evidence “Foundation Medicine is a global, patient-focused precision medicine company delivering high-quality, transformative diagnostic solutions in cancer and other diseases.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 682 contacts → | ||||
Partial evidence “Castle Biosciences (Nasdaq: CSTL) is a leading diagnostics company improving health through innovative tests that guide patient care.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 677 contacts → | ||||
Partial evidence “The Menarini Group ("Menarini"), a leading Italian pharmaceutical and diagnostics company, and Stemline Therapeutics, Inc.("Stemline"), a wholly-owned subsidiary of the Menarini…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 676 contacts → | ||||
Indirect evidence “Every second of every hour of every day, 44 of our products are employed in the battle against cancer.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 675 contacts → | ||||
Partial evidence “Veracyte is a global diagnostics company that empowers clinicians with the high-value insights they need to guide and assure patients at pivotal moments in the race to diagnose…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 435 contacts → | ||||
Partial evidence “Our mission is to develop flexible and affordable diagnostics and therapeutics that improve the everyday lives of those around us.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 361 contacts → | ||||
Partial evidence “Biodesix is a leading diagnostics solutions company, driven to improve clinical care and outcomes for patients.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 325 contacts → | ||||
Indirect evidence “At Personalis, we are transforming the active management of cancer through breakthrough personalized testing.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 305 contacts → | ||||
Partial evidence “Headquartered in Asheville, N.C, Genova Diagnostics is a global specialty clinical laboratory, pioneering a systems approach that supports healthcare providers in the personalized…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 224 contacts → | ||||
Indirect evidence “IDEAYA is an oncology-focused precision medicine company.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 212 contacts → | ||||
Indirect evidence “Clear and confident health care decisions begin with questions.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 202 contacts → | ||||
Indirect evidence “BioGenex designs, develops, and commercializes advanced fully-automated molecular pathology systems for cancer diagnosis, prognosis, personalized medicine, and life science…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 195 contacts → | ||||
Partial evidence “Established in 2011 in Irvine, California, Pathnostics is a leading precision diagnostic testing and development company providing solutions for infectious disease and cancer…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 194 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 182 contacts → | ||||
Partial evidence “Invivoscribe® is a global leader dedicated to Improving Lives with Precision Diagnostics®, advancing the quality of healthcare by providing innovative products and clinical…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 179 contacts → | ||||
Indirect evidence “Hematogenix, a global cancer-focused life science company serving the pharmaceutical & biotechnology industry as well as community physicians.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 167 contacts → | ||||
Partial evidence “As part of Thermo Fisher Scientific, we develop and manufacture products and offer services to advance the science of transplant diagnostics.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 166 contacts → | ||||
Indirect evidence “Monogram Biosciences, a LabCorp company, is a leader in developing and commercializing innovative products to help guide and improve the treatment of infectious diseases, cancer…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 160 contacts → | ||||
Partial evidence “Roche is dedicated to advancing personalized healthcare by creating diagnostics and treatments tailored to individual genetic and disease profiles.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 125 contacts → | ||||
Partial evidence “Foresight Diagnostics was founded by four Stanford University physicians and scientists who sought to develop high-performing circulating tumor DNA (ctDNA) assays by improving the…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 125 contacts → | ||||
Indirect evidence “Genoptix, a NeoGenomics Company Right Answer, Right Now Advancing positive outcomes in oncology through innovation, quality and service Oncology Expertise For almost 20 years…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 106 contacts → | ||||
Indirect evidence “Alere is now Abbott.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 102 contacts → | ||||
Partial evidence “Athena Diagnostics is a clinical diagnostics service testing laboratory focused on neurology, endocrinology and nephrology.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 100 contacts → | ||||
Indirect evidence “Predicine is a global molecular insights company that is committed to advancing precision medicine in oncology.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
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: companion diagnostic developers. 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 companion diagnostic developers.
- Partial evidence
- Its own public description names part of companion diagnostic developers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name companion diagnostic developers. 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 310 companion diagnostic developers based in the United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 7,750 reachable decision-makers.
Free signup · no credit card
Companion diagnostic developers based in the United States at a glance
As of Sep 19, 2026Companies by employee count
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 310 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 companion diagnostic developers, 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 “companion diagnostic developers”. 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 companion diagnostic developers), 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 companion diagnostic developers, 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, 7,750 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.
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 companion diagnostic developers, 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 companion diagnostic developers are there based in the United States?
RevenueBase identified 310 companion diagnostic developers 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?
Myriad Genetics, headquartered in Salt Lake City, tops this list with the largest team on record.
Which city has the most companion diagnostic developers?
San Diego leads with 13 headquartered companies, followed by Houston (9) and Cambridge (8).
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 7,750 verified decision-maker contacts tracked across these 310 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.
Ready to reach these companies? Verified emails and direct dials for all 310 companion diagnostic developers based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Companion diagnostic developers by geography
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Companion diagnostic developers based in France
- Companion diagnostic developers based in Germany
- Companion diagnostic developers based in India
- Companion diagnostic developers based in the United Kingdom
- AI companies based in the United States
- Cybersecurity companies based in the United States