Quest Diagnostics (NYSE: DGX) SVP covers tax obligations with share sale

Rhea-AI Filing Summary

Quest Diagnostics senior vice president Karthik Kuppusamy disposed of 205 shares of common stock at $204.86 per share to cover tax obligations from vesting restricted share units. This tax-withholding transaction on March 2, 2026 was not an open-market sale. After the transaction, he held 9,869 shares directly, plus additional indirect holdings through a trust and the company’s 401(k) plan.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider KUPPUSAMY KARTHIK

Role SVP, Clinical Solutions

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	205	$204.86	$42K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 9,869 shares (Direct); Common Stock — 358 shares (Indirect, By Trust)

Footnotes (1)

1. Sale of common stock to satisfy tax obligations arising from the vesting of a previous grant of restricted share units. The amount includes exempt purchases made under the Company's stock purchase plan since the date of the reporting person's last filing on Form 4. These underlying shares were acquired on a periodic basis by the trustee of the Company's tax qualified Profit Sharing (401(k)) 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 the Plan (which includes some money market instruments) divided by the market price of the Company's stock as of that date.

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^*

KUPPUSAMY KARTHIK

(Last) (First) (Middle)

500 PLAZA DRIVE

C/O QUEST DIAGNOSTICS INC

(Street)

SECAUCUS NJ 07094

(City) (State) (Zip)

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Clinical Solutions

3. Date of Earliest Transaction (Month/Day/Year)
03/02/2026

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

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

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

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	03/02/2026		F		205(1)	D	$204.86	9,869(2)	D
Common Stock								358	I	By Trust
Common Stock								1,658(3)	I	401(k)

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. Sale of common stock to satisfy tax obligations arising from the vesting of a previous grant of restricted share units.

2. The amount includes exempt purchases made under the Company's stock purchase plan since the date of the reporting person's last filing on Form 4.

3. These underlying shares were acquired on a periodic basis by the trustee of the Company's tax qualified Profit Sharing (401(k)) 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 the Plan (which includes some money market instruments) divided by the market price of the Company's stock as of that date.

Remarks:

	Sean D. Mersten, Attorney in Fact for Karthik Kuppusamy	03/04/2026
	** 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.

FAQ

What did Quest Diagnostics (DGX) executive Karthik Kuppusamy report in this Form 4?

He reported a tax-withholding disposition of 205 Quest Diagnostics shares at $204.86 each. The shares were sold to satisfy tax obligations arising from vesting restricted share units, rather than as a discretionary open-market sale.

How many Quest Diagnostics (DGX) shares did the SVP dispose of and at what price?

He disposed of 205 Quest Diagnostics common shares at $204.86 per share. The disposition was made to cover tax obligations tied to previously granted restricted share units that recently vested, according to the filing’s explanatory footnote.

Was the Quest Diagnostics (DGX) insider transaction an open-market sale?

No, the transaction was a tax-withholding disposition related to restricted share units. The filing states the common stock was sold to satisfy tax obligations from the vesting of a prior RSU grant, not a discretionary open-market trade.

What are Karthik Kuppusamy’s Quest Diagnostics (DGX) holdings after this Form 4 event?

After the tax-withholding disposition, he directly holds 9,869 Quest Diagnostics shares. He also has indirect holdings, including 358 shares held by a trust and 1,658 shares via the company’s tax-qualified Profit Sharing (401(k)) Plan.

What do the Quest Diagnostics (DGX) Form 4 footnotes explain about the 401(k) shares?

The footnotes explain the underlying 401(k) shares were acquired periodically by the plan trustee. Share counts are based on the account’s company stock fund balance, which can include money market instruments, divided by the stock’s market price on a current date.

Do the Quest Diagnostics (DGX) Form 4 footnotes mention other share purchases?

Yes, one footnote says the reported amount includes exempt purchases under the company’s stock purchase plan. These purchases occurred since the reporting person’s last Form 4 filing and are separate from the 205-share tax-withholding disposition.