Insider plans $14.5M stock sale via Form 144

A shareholder of MRK has filed a Form 144 indicating an intention to sell 121,573 shares of common stock on the NYSE.

Rhea-AI Filing Summary

A shareholder of MRK has filed a Form 144 indicating an intention to sell 121,573 shares of common stock on the NYSE. The planned sale, through Morgan Stanley Smith Barney LLC, has an aggregate market value of $14,485,690.41.

The shares were acquired on 02/09/2026 by exercising stock options under a registered plan, with the purchase price paid in cash on the same date. The filing notes that 2,482,022,536 shares of the issuer’s common stock were outstanding, providing context for the size of the proposed sale.

FAQ

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

What does MRK's latest Form 144 filing disclose?

The Form 144 discloses a planned resale of MRK common stock. A shareholder intends to sell 121,573 MRK common shares on the NYSE through Morgan Stanley Smith Barney LLC, with an aggregate market value of $14,485,690.41, under the Rule 144 resale framework.

How many MRK shares are planned for sale in this Form 144?

The filing covers 121,573 MRK common shares to be sold. These shares are to be sold on the NYSE through Morgan Stanley Smith Barney LLC Executive Financial Services, as disclosed in the Form 144 securities information table.

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

The aggregate market value of the planned MRK share sale is $14,485,690.41. This figure comes from the securities information table, which ties the value to 121,573 common shares intended for sale on the NYSE.

How were the MRK shares in this Form 144 acquired?

The MRK shares were acquired by exercising stock options under a registered plan. The Form 144 states the options were exercised on 02/09/2026, with 121,573 shares obtained from the issuer and the purchase price paid in cash on the same date.

When is the approximate sale date for the MRK shares in this Form 144?

The approximate sale date disclosed is 02/09/2026. The securities information section lists this date for the planned NYSE sale of 121,573 MRK common shares through Morgan Stanley Smith Barney LLC Executive Financial Services.

How many MRK shares were outstanding when this Form 144 was filed?

The Form 144 notes 2,482,022,536 MRK common shares outstanding. This outstanding share count appears in the securities information table and provides context for the relative size of the planned 121,573-share resale.

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

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Accepted by SEC EDGAR 02/09/2026 - 04:57 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	0001737231
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	JENNIFER ZACHARY
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	121573	14485690.41	2482022536	02/09/2026	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	02/09/2026	Exercise of options under a registered plan	Issuer			121573	02/09/2026	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	02/09/2026
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 Zachary
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)