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  4. [Form 4] QUEST DIAGNOSTICS INC Insider Trading Activity

Director at Quest Diagnostics (NYSE: DGX) receives 1,142 RSUs

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Diaz Luis reported acquisition or exercise transactions in this Form 4 filing.

Quest Diagnostics director Luis Diaz received an equity grant in the form of restricted stock units. On May 20, 2026, he was awarded 1,142 shares of Quest Diagnostics common stock at no purchase price, increasing his directly held stake to 5,196 shares. This represents routine stock-based compensation rather than an open-market trade.

Positive

  • None.

Negative

  • None.
Insider Diaz Luis
Role null
Type Security Shares Price Value
Grant/Award Common Stock 1,142 $0.00 --
Holdings After Transaction: Common Stock — 5,196 shares (Direct, null)
Footnotes (1)
  1. [object Object]
RSU grant size 1,142 shares Restricted stock units of common stock granted to Luis Diaz
Transaction date May 20, 2026 Date of RSU award to director Luis Diaz
Grant price per share $0.00 per share Compensation grant, not an open-market purchase
Shares held after grant 5,196 shares Luis Diaz direct ownership of Quest Diagnostics common stock
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.
Grant, award, or other acquisition financial
"transaction_code_description: Grant, award, or other acquisition"
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.
Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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*
Diaz Luis
(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)
XDirector10% 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)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock(1)05/20/2026A1,142A$05,196D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. Represents an award of restricted stock units.
Remarks:
Sean D. Mersten, Attorney in Fact for Luis A. Diaz, Jr., M.D.05/21/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did DGX director Luis Diaz report?

Director Luis Diaz reported an award of 1,142 restricted stock units of Quest Diagnostics common stock. The grant was recorded at no purchase price, reflecting stock-based compensation rather than an open-market transaction, and increased his directly owned position to a total of 5,196 shares.

When did Luis Diaz receive restricted stock units from Quest Diagnostics (DGX)?

Luis Diaz received the award of restricted stock units on May 20, 2026. The Form 4 shows this as a grant of 1,142 Quest Diagnostics common shares, recorded with a per-share transaction price of zero, indicating compensation instead of a market purchase.

How many Quest Diagnostics shares does Luis Diaz own after this Form 4 grant?

After the award, Luis Diaz directly owns 5,196 shares of Quest Diagnostics common stock. This total reflects the addition of 1,142 restricted stock units granted as compensation, as reported in the Form 4 insider filing with the SEC for Quest Diagnostics.

Was the Luis Diaz DGX Form 4 a stock purchase or compensation grant?

The Luis Diaz Form 4 reports a compensation grant, not a market purchase. It records 1,142 restricted stock units of Quest Diagnostics common stock with a transaction code "A," meaning a grant, award, or other acquisition at a price of zero per share.

What does the footnote on the DGX Form 4 for Luis Diaz explain?

The footnote explains that the reported transaction represents an award of restricted stock units. This clarifies that Luis Diaz’s 1,142-share increase in Quest Diagnostics common stock resulted from stock-based compensation rather than an open-market buy or derivative option exercise.

Does the Luis Diaz Quest Diagnostics Form 4 involve any derivative securities?

The filing shows no derivative securities for this transaction. It reports only a non-derivative award of 1,142 restricted stock units of Quest Diagnostics common stock, and the derivative holdings section is empty, indicating no options or similar instruments disclosed in this Form 4.