Quest Diagnostics holder plans $5.5M share sale

QUEST DIAGNOSTICS INC (DGX) received a Rule 144 notice indicating that Michael E. Prevoznik plans to sell up to 22,677 shares of the company’s common stock through Fidelity Brokerage Services LLC.

Rhea-AI Filing Summary

QUEST DIAGNOSTICS INC (DGX) received a Rule 144 notice indicating that Michael E. Prevoznik plans to sell up to 22,677 shares of the company’s common stock through Fidelity Brokerage Services LLC. The shares relate to a stock option exercise, with a planned sale date of August 28, 2026 on the NYSE.

The filing lists an aggregate market value for the shares to be sold of $5,513,082.35. Quest Diagnostics common shares outstanding are reported as 110,373,360 as of the date referenced; this is a baseline figure, not the amount being sold.

Key Figures

Shares to be sold: 22,677 shares of common stock Aggregate market value of shares to be sold: $5,513,082.35 Shares outstanding: 110,373,360 shares +1 more

4 metrics

Shares to be sold 22,677 shares of common stock Maximum number of DGX shares proposed to be sold under Rule 144

Aggregate market value of shares to be sold $5,513,082.35 Market value associated with the 22,677 DGX shares covered by the notice

Shares outstanding 110,373,360 shares DGX common shares outstanding as referenced in the Form 144

Planned sale date 08/28/2026 Proposed sale date tied to the stock option exercise and cash transaction

Key Terms

Rule 144, stock option exercise, aggregate market value

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

stock option exercise financial

"Common | 08/28/2026 | Stock Option Exercise | Issuer"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

aggregate market value financial

"Common | Fidelity Brokerage Services LLC ... | 22677 | 5513082.35"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filed for DGX disclose?

It discloses that Michael E. Prevoznik plans to sell up to 22,677 DGX common shares under Rule 144, in connection with a stock option exercise, through Fidelity Brokerage Services LLC on or after August 28, 2026.

How many DGX shares are covered by this Form 144 notice?

The notice covers up to 22,677 shares of Quest Diagnostics Inc. common stock proposed to be sold through Fidelity Brokerage Services LLC under Rule 144.

What is the aggregate market value of the DGX shares in this planned Rule 144 sale?

The Form 144 lists an aggregate market value of $5,513,082.35 for the 22,677 shares of Quest Diagnostics common stock proposed to be sold.

When is the planned sale date for the DGX shares under this Form 144?

The planned sale date stated is August 28, 2026, tied to a stock option exercise and cash transaction for the 22,677 DGX common shares.

How many Quest Diagnostics (DGX) shares are outstanding according to this filing?

The filing reports 110,373,360 Quest Diagnostics common shares outstanding. This number provides context and is not the number of shares being sold under the Form 144.

Who is executing the DGX stock sale described in the Form 144?

The planned sale is for the account of Michael E. Prevoznik and is to be executed through Fidelity Brokerage Services LLC as the broker for the 22,677 DGX common shares.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/28/2026 - 04:09 PM EDT Accepted by SEC EDGAR 08/28/2026 - 04:08 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001222679
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	QUEST DIAGNOSTICS INC
SEC File Number	001-12215
Address of Issuer	500 PLAZA DRIVE SECAUCUS NEW JERSEY 07094
Phone	9735202700
Name of Person for Whose Account the Securities are To Be Sold	PREVOZNIK MICHAEL E
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	22677	5513082.35	110373360	08/28/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	08/28/2026	Stock Option Exercise	Issuer			22677	08/28/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	08/28/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/29/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Michael Prevoznik
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)