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QUEST DIAGNOSTICS INC

For the period ended Sep 30, 2025. Filed Oct 21, 2025.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2025 · Filed Oct 21, 2025

DGX$259.67+1.6%Stored close · as of Nov 9, 2026

Extracted filing text, with the paragraph anchors used by the comparison.

See the whole filing, with its images and exhibits

Item 6. Exhibits

22Subsidiary Guarantors of Securities
31.1Rule 13a-14(a) Certification of Chief Executive Officer
31.2Rule 13a-14(a) Certification of Chief Financial Officer
32.1Section 1350 Certification of Chief Executive Officer
32.2Section 1350 Certification of Chief Financial Officer
101.INSInline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCHInline XBRL Taxonomy Extension Schema Document - dgx-20250930.xsd
101.CALInline XBRL Taxonomy Extension Calculation Linkbase Document - dgx-20250930_cal.xml
101.DEFInline XBRL Taxonomy Extension Definition Linkbase Document - dgx-20250930_def.xml
101.LABInline XBRL Taxonomy Extension Label Linkbase Document - dgx-20250930_lab.xml
101.PREInline XBRL Taxonomy Extension Presentation Linkbase Document - dgx-20250930_pre.xml
104Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101)

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

October 21, 2025

Quest Diagnostics Incorporated

By/s/ James E. Davis
James E. Davis
Chairman, Chief Executive Officer
and President
By/s/ Sam A. Samad
Sam A. Samad
Executive Vice President and
Chief Financial Officer
ContentsView on SEC.gov

The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.