| 99.3‡ | | | Sixth Amended and Restated Credit and Security Agreement, dated as of October 27, 2017 among Quest Diagnostics Receivables Inc., Quest Diagnostics Incorporated, as Initial Servicer, MUFG Bank, LTD., as Administrative Agent, the Lenders party thereto, the financial institutions party thereto as agents for the conduit lenders (filed as an Exhibit to the Company’s current report on Form 8-K (Date of Report: May 4, 2020) and incorporated herein by reference) (Commission File Number 001-12215) | | |
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| 99.4‡ | | | Amendment No. 1 to Sixth Amended and Restated Credit and Security Agreement, dated as of October 26, 2018 (filed as an Exhibit to the Company’s current report on Form 8-K (Date of Report: May 4, 2020) and incorporated herein by reference) (Commission File Number 001-12215) | | |
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| 99.5‡ | | | Amendment No. 2 to Sixth Amended and Restated Credit and Security Agreement, dated as of June 14, 2019 (filed as an Exhibit to the Company’s current report on Form 8-K (Date of Report: May 4, 2020) and incorporated herein by reference) (Commission File Number 001-12215) | | |
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| 99.6‡ | | | Amendment No. 3 to Sixth Amended and Restated Credit and Security Agreement, dated as of October 25, 2019 (filed as an Exhibit to the Company’s current report on Form 8-K (Date of Report: May 4, 2020) and incorporated herein by reference) (Commission File Number 001-12215) | | |
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| 99.7‡* | | | Amendment No. 4 to Sixth Amended and Restated Credit and Security Agreement, dated as of October 22, 2020 | | |
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| 99.8‡ | | | Amendment No. 1, dated as of April 30, 2020, relating to the Second Amended and Restated Credit Agreement, dated as of March 22, 2018, among Quest Diagnostics Incorporated, as Borrower, the lenders identified therein, JPMorgan Chase Bank, N.A., as Administrative Agent, and other agents party thereto and which includes, as Exhibit A, the Second Restated Credit Agreement marked to show the amended text (filed as an Exhibit to the Company’s current report on Form 8-K (Date of Report: May 4, 2020) and incorporated herein by reference) (Commission File Number 001-12215) | | |
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| 101.INS | | | Inline 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 | | |
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| 101.SCH | | | Inline XBRL Taxonomy Extension Schema Document - dgx-20201231.xsd | | |
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| 101.CAL | | | Inline XBRL Taxonomy Extension Calculation Linkbase Document - dgx-20201231_cal.xml | | |
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| 101.DEF | | | Inline XBRL Taxonomy Extension Definition Linkbase Document - dgx-20201231_def.xml | | |
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| 101.LAB | | | Inline XBRL Taxonomy Extension Label Linkbase Document - dgx-20201231_lab.xml | | |
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| 101.PRE | | | Inline XBRL Taxonomy Extension Presentation Linkbase Document - dgx-20201231_pre.xml | | |
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| 104 | | | The cover page from this annual report on Form 10-K, formatted in Inline XBRL. | | |
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| * | | | Filed herewith. | | |
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| ** | | | Furnished herewith. | | |
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| ‡ | | | Management contract or compensatory plan or arrangement required to be filed as an Exhibit to this Form 10-K pursuant to Item 15(b) of Form 10-K. | | |