| 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) | | |
| | | | | |
| 99.7 | | | Amendment No. 4 to Sixth Amended and Restated Credit and Security Agreement, dated as of October 22, 2020 (filed as an Exhibit to the Company's 2020 annual report of Form 10-K and incorporated herein by reference) (Commission File Number 001-12215) | | |
| | | | | |
| 99.8 | | | Amendment No. 5 to Sixth Amended and Restated Credit and Security Agreement, dated as of August 13, 2021 (filed as an Exhibit to the Company’s quarterly report on Form 10-Q for the quarter ended September 30, 2021 and incorporated herein by reference) (Commission File Number 001-12215) | | |
| | | | | |
| 99.9* | | | Amendment No. 6 to Sixth Amended and Restated Credit and Security Agreement, dated as of October 21, 2021 | | |
| | | | | |
| 99.10* | | | Amendment and Restatement Agreement, dated as of November 23, 2021, relating to the Second Amended and Restated Credit Agreement, dated as of March 22, 2018, among Quest Diagnostics Incorporated, as Borrower, the lenders party thereto, JPMorgan Chase Bank, N.A., as Administrative Agent, and other agents party thereto and which includes, as Exhibit A, the Third Restated Credit Agreement | | |
| | | | | |
| 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 | | |
| | | | | |
| 101.SCH | | | Inline XBRL Taxonomy Extension Schema Document - dgx-20211231.xsd | | |
| | | | | |
| 101.CAL | | | Inline XBRL Taxonomy Extension Calculation Linkbase Document - dgx-20211231_cal.xml | | |
| | | | | |
| 101.DEF | | | Inline XBRL Taxonomy Extension Definition Linkbase Document - dgx-20211231_def.xml | | |
| | | | | |
| 101.LAB | | | Inline XBRL Taxonomy Extension Label Linkbase Document - dgx-20211231_lab.xml | | |
| | | | | |
| 101.PRE | | | Inline XBRL Taxonomy Extension Presentation Linkbase Document - dgx-20211231_pre.xml | | |
| | | | | |
| 104 | | | The cover page from this annual report on Form 10-K, formatted in Inline XBRL. | | |
| | | | | |
| * | | | Filed herewith. | | |
| | | | | |
| ** | | | Furnished herewith. | | |
| | | | | |
| ‡ | | | 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. | | |