Catherine T. Doherty - 03 Nov 2026 Form 4 Insider Report for QUEST DIAGNOSTICS INC (DGX)

Reporting relationship: Executive Vice President
Issuer ticker: DGX
Reported as of: 03 Nov 2026
Net transaction value: -$5,482,442
SEC form: 4
Accepted by SEC: 05 Nov 2026, 19:05:25 UTC
Prior SEC filing: 06 Mar 2026
Source filing: View source filing
Reporting owner signature: Sean D. Mersten, Attorney in Fact for Catherine T. Doherty

Filing notes and source

Key filing fact

Catherine T. Doherty filed Form 4 for QUEST DIAGNOSTICS INC (DGX) on 05 Nov 2026.

Key facts

This page summarizes Catherine T. Doherty's Form 4 filing for QUEST DIAGNOSTICS INC (DGX).
10 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 05 Nov 2026, 19:05.

Change

Previous filing in this sequence was filed on 06 Mar 2026.
Current net transaction value: -$5,482,442.

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 0001520897 Primary reporting owner

Doherty Catherine T.

Relationship: Executive Vice President
Address: 500 PLAZA DRIVE, SECAUCUS
Signature: Sean D. Mersten, Attorney in Fact for Catherine T. Doherty
Signature date: 05 Nov 2026

Reported non-derivative transactions

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

DGX transaction

Common Stock

Award

Transaction value
Shares: +4,827
Change %: +7.2%
Price: $0.000000^*
Shares after: 71,949
Date: 03 Nov 2026
Ownership: Direct
Footnotes: F1

DGX transaction

Common Stock

Options Exercise

Transaction value
Shares: +22,105
Change %: +31%
Price: $121.80^*
Shares after: 94,054
Date: 03 Nov 2026
Ownership: Direct
Footnotes: F2

DGX transaction

Common Stock

Sale

Transaction value: -$937,135
Shares: -3,818
Change %: -4.1%
Price: $245.45
Shares after: 90,236
Date: 03 Nov 2026
Ownership: Direct
Footnotes: F2, F3

DGX transaction

Common Stock

Sale

Transaction value: -$1,475,127
Shares: -5,990
Change %: -6.6%
Price: $246.26
Shares after: 84,246
Date: 03 Nov 2026
Ownership: Direct
Footnotes: F2, F4

DGX transaction

Common Stock

Sale

Transaction value: -$284,278
Shares: -1,151
Change %: -1.4%
Price: $246.98
Shares after: 83,095
Date: 03 Nov 2026
Ownership: Direct
Footnotes: F2, F5

DGX transaction

Common Stock

Sale

Transaction value: -$585,689
Shares: -2,358
Change %: -2.8%
Price: $248.38
Shares after: 80,737
Date: 03 Nov 2026
Ownership: Direct
Footnotes: F2, F6

DGX transaction

Common Stock

Sale

Transaction value: -$749,208
Shares: -3,004
Change %: -3.7%
Price: $249.40
Shares after: 77,733
Date: 03 Nov 2026
Ownership: Direct
Footnotes: F2, F7

DGX transaction

Common Stock

Sale

Transaction value: -$720,655
Shares: -2,877
Change %: -3.7%
Price: $250.49
Shares after: 74,856
Date: 03 Nov 2026
Ownership: Direct
Footnotes: F2, F8

DGX transaction

Common Stock

Sale

Transaction value: -$730,351
Shares: -2,907
Change %: -3.9%
Price: $251.24
Shares after: 71,949
Date: 03 Nov 2026
Ownership: Direct
Footnotes: F2, F9

DGX holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 4,552
Date: 03 Nov 2026
Ownership: 401(k)/SDCP
Footnotes: F10

Reported derivative securities

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

DGX transaction Derivative

Non-Qualifed Stock Option (right to buy)

Options Exercise

Transaction value
Shares: -22,105
Change %: -100%
Price: $121.80^*
Shares after: 0
Date: 03 Nov 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 22,105
Exercise price: $121.80
Footnotes: F2, F11

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

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 11 footnotes

Footnote F1

Represents an award of restricted stock units.

Footnote F2

This exercise and sale reported were effected pursuant to a Rule 10b5-1 sales plan adopted by the reporting person.

Footnote F3

This transaction was executed in multiple trades at prices ranging from $244.840 to $245.8353. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Footnote F4

This transaction was executed in multiple trades at prices ranging from $245.845 to $246.810. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Footnote F5

This transaction was executed in multiple trades at prices ranging from $246.850 to $247.240. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Footnote F6

This transaction was executed in multiple trades at prices ranging from $247.930 to $248.7825. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Footnote F7

This transaction was executed in multiple trades at prices ranging from $249.005 to $250.0008. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Footnote F8

This transaction was executed in multiple trades at prices ranging from $250.005 to $251.0036. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Footnote F9

This transaction was executed in multiple trades at prices ranging from $251.005 to $251.700. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Footnote F10

These underlying shares were acquired on a periodic basis by the trustee of the Company's tax qualified Profit Sharing (401(k)) and/or Supplemental Deferred Compensation Plan. The information was obtained from the plan administrator as of a current date. The number of shares is based on the account balance of the Company stock fund under each Plan (which includes some money market instruments) divided by the market price of the Company's stock as of that date.

Footnote F11

The options vested in three annual installments beginning with the first on February 17, 2022, the second on February 17, 2023 and the final on February 17, 2024.