Director at Quest Diagnostics (DGX) receives 1,142 share units

Rhea-AI Filing Summary

Quest Diagnostics Inc. director Gary M. Pfeiffer received an award of 1,142 restricted stock units of common stock on May 20, 2026 at no cash cost, as part of his director compensation. After this grant, his direct holdings total 31,005 shares, which include shares acquired through dividend reinvestment under the Amended and Restated Deferred Compensation Plan for Directors.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider PFEIFFER GARY M

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	1,142	$0.00	--

Holdings After Transaction: Common Stock — 31,005 shares (Direct, null)

Footnotes (1)

1. Represents an award of restricted stock units. 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.

Key Figures

RSU grant size: 1,142 shares Grant price per share: $0.00 per share Shares after transaction: 31,005 shares +1 more

4 metrics

RSU grant size 1,142 shares Restricted stock unit award on May 20, 2026

Grant price per share $0.00 per share Reported value for RSU grant to director

Shares after transaction 31,005 shares Total direct holdings following RSU award

Transaction date May 20, 2026 Date RSU grant was awarded

Key Terms

restricted stock units, dividend reinvestment, Amended and Restated Deferred Compensation Plan for Directors

3 terms

restricted stock units financial

"Represents an award of restricted stock units."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

dividend reinvestment financial

"The amount includes shares acquired via dividend reinvestment since the date"

Dividend reinvestment is when the money earned from a company's profit sharing, called dividends, is automatically used to buy more shares of that company instead of being received as cash. This process helps investors grow their holdings over time without extra effort, much like using earned interest to buy more of a savings account. It encourages long-term investment growth by continuously increasing the amount of shares owned.

Amended and Restated Deferred Compensation Plan for Directors financial

"pursuant to the Amended and Restated Deferred Compensation Plan for Directors."

Form 4 Insider Transactions: What Each Field Means →

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^*

PFEIFFER GARY M

(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)
05/20/2026

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(1)	05/20/2026		A		1,142	A	$0	31,005(2)	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. Represents an award of restricted stock units.

2. 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.

Remarks:

	Sean D. Mersten, Attorney in Fact for Gary M. Pfeiffer	05/21/2026
	** 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)

FAQ

What did Quest Diagnostics (DGX) director Gary Pfeiffer report in this Form 4?

Director Gary M. Pfeiffer reported receiving 1,142 restricted stock units of Quest Diagnostics common stock as a grant. This award increased his direct holdings to 31,005 shares, reflecting routine director compensation rather than an open-market stock purchase or sale.

Was the Quest Diagnostics (DGX) Form 4 transaction an open-market buy or sell?

The transaction was not an open-market buy or sell. Gary Pfeiffer received 1,142 shares as a grant of restricted stock units at a reported price of $0.00 per share, indicating compensation rather than a voluntary market trade by the director.

How many Quest Diagnostics (DGX) shares does Gary Pfeiffer hold after this grant?

Following the award, Gary Pfeiffer directly holds 31,005 shares of Quest Diagnostics common stock. This total includes the newly granted 1,142 restricted stock units and shares previously accumulated through dividend reinvestment in the directors’ deferred compensation plan.

What is the significance of the 1,142 restricted stock units granted by Quest Diagnostics (DGX)?

The 1,142 restricted stock units represent a compensation award to director Gary Pfeiffer. Such grants align director interests with shareholders by providing equity-based pay, but do not reflect an active decision to buy or sell shares in the open market.

How were dividend reinvestments reflected in Gary Pfeiffer’s Quest Diagnostics (DGX) holdings?

The reported 31,005 Quest Diagnostics shares include stock acquired via dividend reinvestment. These reinvestments occurred under the Amended and Restated Deferred Compensation Plan for Directors since his prior Form 4, automatically adding shares instead of paying cash dividends.