Quest Diagnostics (DGX) director receives 1,142-share restricted stock unit grant

Rhea-AI Filing Summary

Quest Diagnostics director Timothy L. Main received an award of 1,142 shares of Common Stock in the form of restricted stock units on May 20, 2026. The award was granted at $0.00 per share as part of his compensation and is classified as a grant or award acquisition. Following this transaction, his directly owned Common Stock holdings increased to 27,439 shares.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider MAIN TIMOTHY L

Role null

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

Holdings After Transaction: Common Stock — 27,439 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

RSU award size: 1,142 shares Grant price: $0.00 per share Shares held after grant: 27,439 shares

3 metrics

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

Grant price $0.00 per share Transaction price for RSU award

Shares held after grant 27,439 shares Director’s direct Common Stock holdings following transaction

Key Terms

restricted stock units, Common Stock, Grant, award, or other acquisition

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.

Common Stock financial

""security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Grant, award, or other acquisition financial

""transaction_code_description": "Grant, award, or other acquisition""

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^*

MAIN TIMOTHY L

(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	27,439	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.

Remarks:

	Sean D. Mersten, Attorney in Fact for Timothy L. Main	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 insider transaction did Quest Diagnostics (DGX) report for Timothy L. Main?

Quest Diagnostics reported that director Timothy L. Main received a grant of 1,142 restricted stock units of Common Stock on May 20, 2026. This was a compensation-related award at zero cost per share, increasing his directly owned holdings to 27,439 shares.

Was the Quest Diagnostics (DGX) insider transaction a purchase or an award?

The transaction was an award, not a market purchase. Timothy L. Main received 1,142 restricted stock units classified as a grant or award acquisition, with a transaction price of $0.00 per share, reflecting equity compensation rather than an open-market buy or sell.

How many Quest Diagnostics (DGX) shares does Timothy L. Main hold after this Form 4?

After receiving the 1,142-share restricted stock unit award, Timothy L. Main directly holds 27,439 shares of Quest Diagnostics Common Stock. This figure reflects his position immediately following the reported grant, as shown in the Form 4 ownership data.

What type of security was granted in the Quest Diagnostics (DGX) Form 4 filing?

The filing shows an award of restricted stock units tied to Quest Diagnostics Common Stock. Footnote disclosure specifies that the reported 1,142-share transaction represents an award of restricted stock units, which are equity-based compensation instruments for the director.

Did the Quest Diagnostics (DGX) Form 4 report any insider sales or disposals?

No insider sales or disposals were reported in this Form 4 excerpt. The only transaction is a grant-type acquisition of 1,142 restricted stock units for director Timothy L. Main, with no shares sold, gifted, or withheld for taxes in the data provided.