Quest Diagnostics (NYSE: DGX) SVP reports tax-withholding stock disposition on Form 4

Rhea-AI Filing Summary

Quest Diagnostics senior executive reports small tax-related share disposition. Michael J. Deppe, SVP, Corporate Controller and Chief Accounting Officer of Quest Diagnostics, had 88 shares of common stock withheld at $204.86 per share on a Form 4 event dated March 2, 2026 to satisfy tax obligations from previously vested restricted share units, rather than an open-market sale. After this transaction, he directly held 34,473 shares of Quest Diagnostics common stock. The filing also notes indirect ownership of 706 shares through the company’s 401(k) Profit Sharing Plan, with balances based on plan administrator data.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Deppe Michael J

Role SVP, Corp. Controller & CAO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	88	$204.86	$18K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 34,473 shares (Direct); Common Stock — 706 shares (Indirect, 401(k))

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 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

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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^*

Deppe Michael J

(Last) (First) (Middle)

500 PLAZA DRIVE

(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, Corp. Controller & CAO

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		88(1)	D	$204.86	34,473(2)	D
Common Stock								706(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 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 Michael J. Deppe	03/04/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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FAQ

What did Quest Diagnostics (DGX) executive Michael J. Deppe report on this Form 4?

Michael J. Deppe reported a tax-withholding disposition of 88 shares of Quest Diagnostics common stock. The shares were used to cover tax obligations from the vesting of previously granted restricted share units, rather than sold in an open-market transaction.

How many Quest Diagnostics (DGX) shares were disposed of for taxes and at what price?

The filing shows 88 shares of Quest Diagnostics common stock disposed of at $204.86 per share. According to the footnote, these shares were used to satisfy tax obligations arising from the vesting of an earlier restricted share unit award.

How many Quest Diagnostics (DGX) shares does Michael J. Deppe hold after this Form 4 transaction?

After the tax-withholding disposition, Michael J. Deppe directly holds 34,473 shares of Quest Diagnostics common stock. The filing also reports an additional 706 shares held indirectly through the company’s tax-qualified Profit Sharing (401(k)) Plan.

Was the Quest Diagnostics (DGX) Form 4 transaction an open-market sale by the executive?

No. The Form 4 describes a tax-withholding disposition, not a discretionary open-market sale. Shares were delivered to satisfy tax obligations triggered by the vesting of restricted share units, as detailed in the filing’s explanatory footnote.

What does the Form 4 say about Quest Diagnostics (DGX) shares held in the 401(k) plan?

The Form 4 reports 706 shares held indirectly through the company’s Profit Sharing (401(k)) Plan. These underlying shares are acquired periodically by the plan trustee, with amounts based on the account’s company stock fund balance and current market price.

Does the Quest Diagnostics (DGX) Form 4 mention other share purchases by Michael J. Deppe?

Yes. A footnote states that the reported amount includes exempt purchases made under Quest Diagnostics’ stock purchase plan since the prior Form 4. These transactions are treated as exempt and are reflected in the updated share ownership figures.