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Companies using Quest Diagnostics
Showing 5 of 371 companies
American Society for Clinical Pathology (ASCP)
ascp.org · Professional development and training · 251–500 employees
Last seen 4 Aug 2026
The most recent date Firmable detected Quest Diagnostics at this company.
Decision makers · 62 on fileSenior people on file at this company. Firmable holds their names, emails and mobiles.
Director, Grant OperationsMobileEmail
Executive Director, Center for Global Health & Senior Director, Grant OperationsMobileEmail
Unlock names, emails and mobiles in the trial.
Signals Recent events at this company, such as a leadership change, funding or a new office.
Hired as Chief Executive Officer · 10 Aug 2026
American Society for Clinical Pathology launched series of presentations examining key trends shaping the pathology workforce on Aug 10th '26. · 10 Aug 2026
A breakdown of the 371 companies running Quest Diagnostics.
Top industries
Health and wellness126
Professional and business services46
Education and training38
Information technology and services36
Not for profit20
Media and telecommunications19
Industrial and manufacturing13
Government and public services12
No industry recorded: 18
Company size
1–1045 (14%)
11–5051 (16%)
51–25082 (26%)
251–50046 (15%)
501–1,00015 (5%)
1,001–5,00035 (11%)
5,001–10,00017 (5%)
10,001+26 (8%)
Share of companies with a recorded size, by employees.
No size recorded: 54
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Frequently asked questions
About the Quest Diagnostics data on this page.
How many companies use Quest Diagnostics?
Firmable holds confirmed Quest Diagnostics detections for 371 distinct companies, 85 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use Quest Diagnostics?
American Society for Clinical Pathology (ASCP), Mental Health Association and Maine Resource Guide are among the most prominent in the current set.
What industries use Quest Diagnostics?
Health and wellness, professional and business services and education and training lead the set, across 18 industries in total.
What size companies use Quest Diagnostics?
Adoption concentrates in the 51-250 employee band, across the companies whose size is recorded.
Where are Quest Diagnostics users based?
The United States, Canada, Australia and the Philippines account for most detections, across 13 countries.
How current is this data?
85 companies were confirmed in the last 90 days. Last detection 19 September 2026.
