Shareholder plans sale of 15,000 common shares

MRK had a Rule 144 notice filed for a planned sale of 15,000 shares of common stock through Morgan Stanley Smith Barney LLC on the NYSE, with an aggregate market value of 1,827,991.50.

Rhea-AI Filing Summary

MRK had a Rule 144 notice filed for a planned sale of 15,000 shares of common stock through Morgan Stanley Smith Barney LLC on the NYSE, with an aggregate market value of 1,827,991.50. The filing lists 2,482,022,536 shares of common stock outstanding.

The shares to be sold were acquired mainly through restricted stock vesting under a registered plan on multiple dates between May 2022 and January 2025, plus a small private acquisition from the issuer. The signer represents they are not aware of undisclosed material adverse information about the issuer.

FAQ

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What does the Form 144 filing for MRK disclose?

The Form 144 discloses a planned sale of 15,000 MRK common shares on the NYSE with an aggregate market value of 1,827,991.50. It is a notice of intent to sell restricted or controlled securities under SEC Rule 144.

How many MRK shares are planned to be sold and on which exchange?

The filing covers a planned sale of 15,000 MRK common shares on the New York Stock Exchange (NYSE). These shares are to be sold through Morgan Stanley Smith Barney LLC Executive Financial Services, as listed in the broker information section.

What is the aggregate market value of the MRK shares in this Form 144?

The aggregate market value of the MRK common shares covered by this notice is 1,827,991.50. This value is based on the 15,000 shares indicated in the filing’s securities information table for the intended Rule 144 sale.

How were the MRK shares in the Form 144 acquired?

The shares were acquired primarily through restricted stock vesting under a registered plan on numerous dates between May 2022 and January 2025. The filing also lists a small private acquisition from the issuer on January 10, 2023.

What does the Form 144 say about MRK shares outstanding?

The securities information section states that there are 2,482,022,536 MRK common shares outstanding. This figure provides context for the size of the planned 15,000-share sale relative to the issuer’s total common stock base.

Which broker is handling the MRK Rule 144 share sale?

The planned sale will be handled by Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004. This broker is listed in the filing as the firm through which the 15,000 shares will be sold.

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Accepted by SEC EDGAR 02/06/2026 - 04:19 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	0001916310
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	JOHANNES JACOBUS OOSTHUIZEN
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	15000	1827991.50	2482022536	02/06/2026	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	07/09/2024	Restricted stock vesting under a registered plan	Issuer			34	07/09/2024	Not Applicable
Common	11/07/2022	Restricted stock vesting under a registered plan	Issuer			3795	11/07/2022	Not Applicable
Common	01/27/2025	Restricted stock vesting under a registered plan	Issuer			164	01/27/2025	Not Applicable
Common	05/03/2022	Restricted stock vesting under a registered plan	Issuer			392	05/03/2022	Not Applicable
Common	10/30/2023	Restricted stock vesting under a registered plan	Issuer			464	10/30/2023	Not Applicable
Common	05/04/2024	Restricted stock vesting under a registered plan	Issuer			462	05/04/2024	Not Applicable
Common	07/13/2022	Restricted stock vesting under a registered plan	Issuer			9	07/13/2022	Not Applicable
Common	07/11/2023	Restricted stock vesting under a registered plan	Issuer			23	07/11/2023	Not Applicable
Common	05/01/2023	Restricted stock vesting under a registered plan	Issuer			439	05/01/2023	Not Applicable
Common	04/08/2024	Restricted stock vesting under a registered plan	Issuer			31	04/08/2024	Not Applicable
Common	05/01/2022	Restricted stock vesting under a registered plan	Issuer			439	05/01/2022	Not Applicable
Common	05/04/2022	Restricted stock vesting under a registered plan	Issuer			460	05/04/2022	Not Applicable
Common	04/11/2023	Restricted stock vesting under a registered plan	Issuer			16	04/11/2023	Not Applicable
Common	01/22/2024	Restricted stock vesting under a registered plan	Issuer			3133	01/22/2024	Not Applicable
Common	10/08/2024	Restricted stock vesting under a registered plan	Issuer			40	10/08/2024	Not Applicable
Common	01/09/2024	Restricted stock vesting under a registered plan	Issuer			25	01/09/2024	Not Applicable
Common	01/23/2023	Restricted stock vesting under a registered plan	Issuer			153	01/23/2023	Not Applicable
Common	10/09/2023	Restricted stock vesting under a registered plan	Issuer			24	10/09/2023	Not Applicable
Common	10/12/2022	Restricted stock vesting under a registered plan	Issuer			9	10/12/2022	Not Applicable
Common	01/10/2023	Private Acquisition from Issuer/Affiliate	Issuer			3	01/10/2023	Not Applicable
Common	10/30/2022	Restricted stock vesting under a registered plan	Issuer			463	10/30/2022	Not Applicable
Common	05/04/2023	Restricted stock vesting under a registered plan	Issuer			460	05/04/2023	Not Applicable
Common	01/10/2025	Restricted stock vesting under a registered plan	Issuer			46	01/10/2025	Not Applicable
Common	02/02/2024	Restricted stock vesting under a registered plan	Issuer			3916	02/02/2024	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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	02/06/2026
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/ Johannes J Oosthuizen
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)