TIMOTHY M. RING - 01 Oct 2025 Form 4 Insider Report for QUEST DIAGNOSTICS INC (DGX)

Role: Director
Signature: Sean D. Mersten, Attorney in Fact for Timothy M. Ring
Issuer symbol: DGX
Transactions as of: 01 Oct 2025
Net transactions value: $0
Form type: 4
Filing time: 03 Oct 2025, 16:32:40 UTC
Previous filing: 02 Jul 2025
Next filing: 29 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
RING TIMOTHY M	Director	500 PLAZA DRIVE, SECAUCUS	Sean D. Mersten, Attorney in Fact for Timothy M. Ring	03 Oct 2025	0001204666

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	DGX	Phantom Stock Units	Award	$0	+233	+1.4%	$0.000000	17,036	01 Oct 2025	Common Stock	233	$0.000000	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Phantom stock units resulting from elective deferrals of a director's cash compensation pursuant to the Quest Diagnostics Incorporated Amended and Restated Deferred Compensation Plan for Directors and become payable in cash upon the reporting person's termination of service as a director.
F2	Total number of phantom stock units accrued as of the transaction date in the reporting person's deferred compensation account includes phantom stock units credited as a result of dividend reinvestment transactions exempt from reporting pursuant to Rule 16a-11.