MRK insider plans sale of 10,000 common shares

CHIRFI GUINDO filed a notice covering planned sales of Common Stock of issuer MRK.

Rhea-AI Filing Summary

CHIRFI GUINDO filed a notice covering planned sales of Common Stock of issuer MRK. The filing lists 10,000 shares of Common Stock to be sold through Morgan Stanley Smith Barney LLC Executive Financial Services, with an aggregate market value of $1,350,000.00 and a planned sale date of 08/13/2026 on the NYSE. These shares relate to restricted stock vesting under a registered plan dated 01/27/2025. The filing also reports that, during the past three months, GUINDO sold 15,000 shares of Common Stock on 08/06/2026 for an aggregate value of $1,965,000.00.

Key Figures

Planned shares to be sold: 10,000 shares Planned aggregate market value: $1,350,000.00 Planned sale date: 08/13/2026 +3 more

6 metrics

Planned shares to be sold 10,000 shares Common Stock sale planned through Morgan Stanley Smith Barney LLC

Planned aggregate market value $1,350,000.00 Aggregate market value of 10,000 Common shares planned for sale

Planned sale date 08/13/2026 Anticipated date for sale of 10,000 Common shares on NYSE

Past 3 months shares sold 15,000 shares Common Stock sold by CHIRFI GUINDO on 08/06/2026

Past sale aggregate value $1,965,000.00 Aggregate value of 15,000 Common shares sold on 08/06/2026

CUSIP 2467171638 Identification number associated with the Common Stock

Key Terms

Restricted Stock Vesting Under a Registered Plan, aggregate market value, Executive Financial Services, Securities Sold During The Past 3 Months

4 terms

Restricted Stock Vesting Under a Registered Plan financial

"Restricted Stock Vesting Under a Registered Plan | Issuer"

aggregate market value financial

"10000 | 1350000.00 | 2467171638 | 08/13/2026"

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.

Executive Financial Services financial

"Morgan Stanley Smith Barney LLC Executive Financial Services"

Securities Sold During The Past 3 Months regulatory

"144: Securities Sold During The Past 3 Months"

FAQ

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

What proposed stock sale does this filing disclose for MRK?

The filing discloses a proposed sale of 10,000 shares of MRK Common Stock through Morgan Stanley Smith Barney LLC, with an aggregate market value of $1,350,000.00 and an anticipated sale date of 08/13/2026 on the NYSE.

Who is the reporting person in this MRK-related filing and what is their address?

The reporting person is CHIRFI GUINDO, with an address at 126 East Lincoln Avenue, Rahway, NJ 07065. The filing relates to proposed and recent transactions in MRK Common Stock associated with this individual.

What MRK-related transactions occurred in the past three months?

The filing reports that on 08/06/2026, CHIRFI GUINDO sold 15,000 shares of MRK Common Stock for an aggregate value of $1,965,000.00. This past transaction is disclosed alongside the proposed future sale of additional shares.

How are the 10,000 MRK shares in this filing being acquired or vested?

The 10,000 MRK Common shares are linked to Restricted Stock Vesting Under a Registered Plan dated 01/27/2025. The issuer is identified as the source, indicating these shares come from an equity compensation arrangement.

Which broker is handling the proposed MRK share sale?

The proposed MRK share sale is to be executed through Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004, as disclosed in the filing’s securities information section.

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Available on EDGAR 08/13/2026 - 04:17 PM Accepted by SEC EDGAR 08/13/2026 - 04:15 PM 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	0001722753
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	MERCK & CO., INC.
SEC File Number	001-06571
Address of Issuer	126 East Lincoln Avenue Rahway NEW JERSEY 07065
Phone	(732) 594-4000
Name of Person for Whose Account the Securities are To Be Sold	CHIRFI GUINDO
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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	10000	1350000.00	2467171638	08/13/2026	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	01/27/2025	Restricted Stock Vesting Under a Registered Plan	Issuer			10000	01/27/2025	Not Applicable

* 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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
CHIRFI GUINDO 126 East Lincoln Avenue Rahway NJ 07065	Common	08/06/2026	15000	1965000.00

144: Remarks and Signature

Remarks
Date of Notice	08/13/2026
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	Chirfi Guindo
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)