Quest Diagnostics director Carter acquires 10 shares

The director’s broker-administered dividend reinvestment transaction was eligible for deferred reporting, but he chose to report it early.

Rhea-AI Filing Summary

Quest Diagnostics Inc. (DGX) director Robert B. Carter acquired 10 shares of common stock at $235.93 per share on October 21, 2026, through a dividend reinvestment plan administered by his broker. His directly held position was 3,874 shares after the transaction. The shares were eligible for deferred reporting under Rule 16a-6, and Carter chose to report the acquisition early.

Insider Trade Summary

Small Acquisition: 10 shares

Small Acquisition 1 txn

Insider CARTER ROBERT B

Role Director

Type	Security	Shares	Price	Value
Small Acquisition	Common Stock F1	10	$235.93	$2K

Holdings After Transaction: Common Stock — 3,874 shares (Direct)

Footnotes (1)

1. F1. Reflects shares that were acquired pursuant to a dividend reinvestment plan administered by the reporting person's broker and eligible for deferred reporting on Form 5 under Rule 16a-6. The reporting person has chosen to report such transaction early on this Form 4.

Key Figures

Shares acquired: 10 shares Price per share: $235.93 Direct shares after transaction: 3,874 shares

3 metrics

Shares acquired 10 shares Common stock acquired on October 21, 2026

Price per share $235.93 Common stock acquired on October 21, 2026

Direct shares after transaction 3,874 shares Robert B. Carter’s reported position after the transaction

Key Terms

dividend reinvestment plan, deferred reporting, Rule 16a-6

3 terms

dividend reinvestment plan financial

"acquired pursuant to a dividend reinvestment plan"

A dividend reinvestment plan lets shareholders automatically use cash dividends to buy more shares of the same company instead of receiving the money. It matters to investors because it turns regular payouts into a steady way to grow ownership and take advantage of compound returns—like having your savings automatically buy additional slices of a pie over time—while often reducing transaction costs and smoothing purchase timing.

deferred reporting regulatory

"eligible for deferred reporting on Form 5"

Rule 16a-6 regulatory

"under Rule 16a-6"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many DGX shares did director Robert B. Carter acquire, and at what price?

Robert B. Carter acquired 10 shares of Quest Diagnostics common stock at $235.93 per share on October 21, 2026, through a dividend reinvestment plan administered by his broker.

Why was Robert B. Carter’s DGX transaction reported early?

The shares were eligible for deferred reporting under Rule 16a-6, and Carter chose to report the transaction early.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/23/2026 - 07:33 PM EDT Accepted by SEC EDGAR 10/23/2026 - 07:33 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

CARTER ROBERT B

(Last) (First) (Middle)

500 PLAZA DRIVE

(Street)

SECAUCUS NEW JERSEY 07094

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
QUEST DIAGNOSTICS INC [ DGX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/21/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/21/2026		L	V	10(1)	A	$235.93	3,874	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Reflects shares that were acquired pursuant to a dividend reinvestment plan administered by the reporting person's broker and eligible for deferred reporting on Form 5 under Rule 16a-6. The reporting person has chosen to report such transaction early on this Form 4.

Remarks:

	Sean D. Mersten, Attorney-in-Fact for Robert B. Carter	10/23/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)