7Suppliers
19Customers
1Debt Items
20Related Chains

Source-Backed Evidence Depth

Quest Diagnostics Incorporated (DGX) is shown with relationship data already present in ChainSifter's database. Counts below come from stored supply-chain records and filing/source URLs where available; missing source URLs are not filled in or estimated.

28Total relationships
3Distinct source URLs
15High confidence
0.794Average confidence
2026-09-14Latest database update
ChainSifter does not infer unreported suppliers, customers, ownership, acquisitions, debt exposure, revenue dependency, or future supply-chain events on this public page.

Quest Diagnostics Incorporated Suppliers

TickerNameConfidenceEvidence
IMDX Insight Molecular Diagnostics Inc. 92% Reciprocal relationship from IMDX graph: On February 20, 2026, iMDx announced that it had entered into a Specimen Collection Agreement with Quest Diagnostics for certain specimen collection-related s…
RETRIEVAL-MASTERS-CREDITORS-BUREAU-INC-AMERICAN- RETRIEVAL-MASTERS-CREDITORS-BUREAU-INC-AMERICAN- 90% AMCA previously provided debt collection services for the Company and provided debt collection services for a company that provides revenue management services to the Company.
AWHL Aspira Women's Health Inc. 85% Reciprocal relationship from AWHL graph: been unclear. ASU 2025-12 is effective for annual periods beginning after December 15, 2026, and interim periods within those annual periods, with early adopt…
FLGT Fulgent Genetics, Inc. 72% Reciprocal relationship from FLGT graph: Reciprocal relationship from DGX graph: Reciprocal relationship from FLGT graph: , information technology, and service companies may develop and sell competit…
IDXG Interpace Biosciences, Inc. 72% Reciprocal relationship from IDXG graph: ublications, and trade show exhibits. We believe that our molecular diagnostic tests provide value to payers, physicians, and patients by improving patient ca…
PRPH ProPhase Labs, Inc. 72% Reciprocal relationship from PRPH graph: avorable interpretation of EKRA for laboratory compensation structures, we cannot be assured that courts in our jurisdiction will reach the same conclusion or…
PSNL Personalis, Inc. 72% Reciprocal relationship from PSNL graph: Reciprocal relationship from DGX graph: Reciprocal relationship from PSNL graph: Reciprocal relationship from DGX graph: Reciprocal relationship from PSNL gra…

Quest Diagnostics Incorporated Customers

TickerNameConfidenceEvidence
USGOV-DEPARTMENT-OF-HEALTH-AND-HUMAN-SERVICES USGOV-DEPARTMENT-OF-HEALTH-AND-HUMAN-SERVICES 95% USAspending awards from Department of Health and Human Services: $74,026,005 across 5 awards. 75D30122C13699 COVID 19 GENOMIC SEQUENCING; 75D30121C10058 SEROLOGY TESTING SERVICES; 75P00120C00026 COVI…
USGOV-DEPARTMENT-OF-VETERANS-AFFAIRS USGOV-DEPARTMENT-OF-VETERANS-AFFAIRS 95% USAspending awards from Department of Veterans Affairs: $33,904,933 across 5 awards. 36C24725N0388 TASK ORDER FOR REF LAB BRIDGE WHILE SOLIITATION IS CURRENTLY ACTIVE TO AVOID SERVICE DISRUPTION.; 36…
CLIENT-PAYERS CLIENT-PAYERS 90% These estimates include the impact of contractual allowances (including payer denials), and patient price concessions. The portfolios determined using the portfolio approach consist of the following …
GOVERNMENT-PAYERS GOVERNMENT-PAYERS 90% These estimates include the impact of contractual allowances (including payer denials), and patient price concessions. The portfolios determined using the portfolio approach consist of the following …
HEALTHCARE-INSURERS HEALTHCARE-INSURERS 90% These estimates include the impact of contractual allowances (including payer denials), and patient price concessions. The portfolios determined using the portfolio approach consist of the following …
HEALTHCARE-PROVIDERS HEALTHCARE-PROVIDERS 90% The Company's DS businesses offer solutions for insurers and offer solutions for healthcare providers and payers.
HOSPITALS HOSPITALS 90% The DIS business provides diagnostic information services to a broad range of customers within its primary customer channels - physicians, hospitals, and patients and consumers.
PATIENTS-AND-CONSUMERS PATIENTS-AND-CONSUMERS 90% The DIS business provides diagnostic information services to a broad range of customers within its primary customer channels - physicians, hospitals, and patients and consumers.
PAYERS PAYERS 90% The Company's DS businesses offer solutions for insurers and offer solutions for healthcare providers and payers.
PHYSICIANS PHYSICIANS 90% The DIS business provides diagnostic information services to a broad range of customers within its primary customer channels - physicians, hospitals, and patients and consumers.
FLGT Fulgent Genetics, Inc. 72% Reciprocal relationship from FLGT graph: Reciprocal relationship from DGX graph: Reciprocal relationship from FLGT graph: Reciprocal relationship from DGX graph: Reciprocal relationship from FLGT gra…
PRPH ProPhase Labs, Inc. 72% Reciprocal relationship from PRPH graph: avorable interpretation of EKRA for laboratory compensation structures, we cannot be assured that courts in our jurisdiction will reach the same conclusion or…
CAPITAL-RESOURCES CAPITAL-RESOURCES 62% their operations. In conjunction with the preparation of our March 31, 2026 financial statements, we considered whether the carrying values of our equity method investments were impaired and conclude…
DESCRIPTION-OF-BUSINESS-BACKGROUND-QUEST-DIAGNOS DESCRIPTION-OF-BUSINESS-BACKGROUND-QUEST-DIAGNOS 62% indicated) 1. DESCRIPTION OF BUSINESS Background Quest Diagnostics Incorporated and its subsidiaries ("Quest Diagnostics" or the "Company") work across the healthcare ecosystem to create a healthier …
HAYSTACK-ONCOLOGY-INC HAYSTACK-ONCOLOGY-INC 62% ented by the growth of consumer-initiated testing and demand for expanded access to basic healthcare services. In 2024, we launched a new service that offers patients experiencing symptoms of several…
LENCO-DIAGNOSTIC-LABORATORIES-INC LENCO-DIAGNOSTIC-LABORATORIES-INC 62% the delivery of healthcare services. Clinical testing is used for predisposition, screening, monitoring, diagnosis, prognosis and treatment choices of diseases and other medical conditions. We primar…
OPTUM360-LLC OPTUM360-LLC 62% 2021, the court denied the Company's motion to dismiss the complaint. After discovery was completed, the Company's filed a motion for summary judgment, which was granted. The matter is on appeal. On …
PTION-OF-BUSINESS-BACKGROUND-QUEST-DIAGNOSTICS-I PTION-OF-BUSINESS-BACKGROUND-QUEST-DIAGNOSTICS-I 62% PTION OF BUSINESS Background Quest Diagnostics Incorporated and its subsidiaries ("Quest Diagnostics" or the "Company") work across the healthcare ecosystem to create a healthier world, one life at a…
RETRIEVAL-MASTERS-CREDITORS-BUREAU-INC RETRIEVAL-MASTERS-CREDITORS-BUREAU-INC 62% rface, store or process confidential patient and employee data or other confidential information, as well as those third parties’ providers, are also subject to the risks outlined above. For example,…

Quest Diagnostics Incorporated Debt Obligations

InstrumentDescriptionConfidenceEvidence
DGX-DEBT Debt stack $6.4B 90% Market cache reports total debt of $6.4B.

Quest Diagnostics Incorporated Acquisitions

No acquisitions on recordNo completed or pending acquisitions found in our database for Quest Diagnostics Incorporated.

Quest Diagnostics Incorporated Ownership

HolderNameConfidenceEvidence
DGX-OWNER-VANGUARD-CAPITAL-MANAGEMENT-LLC VANGUARD CAPITAL MANAGEMENT LLC 90% 13F overlay lists VANGUARD CAPITAL MANAGEMENT LLC as top holder; 1066 tracked holders.

Quest Diagnostics Incorporated Extended Supply Chain Network

TickerNameChain IndexHopsRelationship Types
TMO Thermo Fisher Scientific Inc. 100.00 2
MRK Merck & Co., Inc. 100.00 2
PRPH ProPhase Labs, Inc. 100.00 1 ['customer', 'supplier']
QGEN Qiagen N.V. 100.00 2
MYGN Myriad Genetics, Inc. 100.00 2
IMDX Insight Molecular Diagnostics Inc. 100.00 1 ['supplier']
CAI Caris Life Sciences, Inc. 100.00 2
EXAS Exact Sciences Corp 100.00 2
AWHL Aspira Women's Health Inc. 100.00 1 ['supplier']
ABT Abbott Laboratories 100.00 2
GH Guardant Health, Inc. 100.00 2
TEM Tempus AI, Inc. 100.00 2
PAYERS PAYERS 60.75 1 ['receiving']
AZN AstraZeneca PLC 50.00 2
BIO Bio-Rad Laboratories, Inc. 50.00 2
IBO Impact BioMedical Inc. 50.00 2
FISI Financial Institutions, Inc. 50.00 2
NEO NeoGenomics, Inc. 50.00 2
LCTX Lineage Cell Therapeutics, Inc. 50.00 2
LH Labcorp Holdings Inc. 50.00 2
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DGX
Unlock DGX Supply Chain Data
Verified relationships include:
IMDXInsight Molecular Diagnos…Supplier92%
RETRIEVAL-MASTERS-CREDITORS-BUREAU-INC-AMERICAN-RETRIEVAL-MASTERS-CREDITO…Supplier90%
USGOV-DEPARTMENT-OF-HEALTH-AND-HUMAN-SERVICESUSGOV-DEPARTMENT-OF-HEALT…Customer95%
USGOV-DEPARTMENT-OF-VETERANS-AFFAIRSUSGOV-DEPARTMENT-OF-VETER…Customer95%
+24 more relationships locked
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