Gary M. Pfeiffer - 22 Oct 2025 Form 4 Insider Report for QUEST DIAGNOSTICS INC (DGX)

Reporting relationship: Director
Issuer ticker: DGX
Reported as of: 22 Oct 2025
Net transaction value: -$1,111,400
SEC form: 4
Accepted by SEC: 24 Oct 2025, 18:10:54 UTC
Prior SEC filing: 19 May 2025
Next SEC filing: 21 May 2026
Source filing: View source filing
Reporting owner signature: Sean D. Mersten, Attorney in Fact for Gary M. Pfeiffer

Key filing fact

Gary M. Pfeiffer filed Form 4 for QUEST DIAGNOSTICS INC (DGX) on 24 Oct 2025.

Key facts

This page summarizes Gary M. Pfeiffer's Form 4 filing for QUEST DIAGNOSTICS INC (DGX).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 24 Oct 2025, 18:10.

Change

Previous filing in this sequence was filed on 19 May 2025.
Current net transaction value: -$1,111,400.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001127304 Primary reporting owner

PFEIFFER GARY M

Relationship: Director
Address: 500 PLAZA DRIVE, SECAUCUS
Signature: Sean D. Mersten, Attorney in Fact for Gary M. Pfeiffer
Signature date: 24 Oct 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

DGX transaction

Common Stock

Sale

Transaction value: $270,317
Shares: -1,482
Change %: -4.8%
Price: $182.40
Shares after: 29,431
Date: 22 Oct 2025
Ownership: Direct

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

DGX transaction Derivative

Phantom Stock

Discretionary transaction in accordance with Rule 16b-3(f) resulting in acquisition or disposition of issuer securities

Transaction value: $841,084
Shares: -4,413
Change %: -100%
Price: $190.58
Shares after: 0
Date: 23 Oct 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 4,413
Exercise price
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

This transaction constitutes an intra-plan transfer in the Quest Diagnostics Incorporated Amended and Restated Deferred Compensation Plan for Directors from the company stock fund to another investment option. The phantom common stock units were payable in cash and represented a like number of shares of the company's common stock.

Footnote F2

The amount includes shares acquired via dividend reinvestment since the date of reporting person's last filing on Form 4 pursuant to the Amended and Restated Deferred Compensation Plan for Directors.