MRK (MRK) investor plans $10.7M NYSE stock sale under Form 144

Rhea-AI Filing Summary

A holder of MRK common stock filed to sell up to 80,315 shares through Morgan Stanley Smith Barney LLC Executive Financial Services on the NYSE around 08/12/2026, with an aggregate market value of $10,718,494.55. These shares were obtained via option exercises and restricted stock vesting under registered compensation plans between 2023 and 2026.

Key Figures

Shares to be sold: 80,315 shares Aggregate market value: $10,718,494.55 Shares outstanding: 2,467,171,638 shares +4 more

7 metrics

Shares to be sold 80,315 shares Planned sale of common stock around 08/12/2026

Aggregate market value $10,718,494.55 Value of 80,315 common shares proposed for sale

Shares outstanding 2,467,171,638 shares Common shares outstanding listed in the filing; baseline figure

Option exercise acquisition 41,494 shares Acquired 08/12/2026 via Exercise of Options Under a Registered Plan (cash)

Option exercise acquisition 13,433 shares Acquired 08/12/2026 via Exercise of Options Under a Registered Plan (cash)

Restricted stock vesting 23,298 shares Vested 01/22/2024 under a Registered Plan

Restricted stock vesting (example) 466 shares Vested 07/08/2026 under a Registered Plan

Key Terms

Exercise of Options Under a Registered Plan, Restricted Stock Vesting Under a Registered Plan, Executive Financial Services

3 terms

Exercise of Options Under a Registered Plan financial

"Common | 08/12/2026 | Exercise of Options Under a Registered Plan | Issuer"

Restricted Stock Vesting Under a Registered Plan financial

"Common | 04/11/2023 | Restricted Stock Vesting Under a Registered Plan"

Executive Financial Services financial

"Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza"

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Available on EDGAR 08/12/2026 - 04:19 PM Accepted by SEC EDGAR 08/12/2026 - 04:19 PM Learn about SEC filing dates

FAQ

What does the MRK Form 144 filing disclose?

The Form 144 for MRK discloses a planned sale of 80,315 common shares on the NYSE. The shares were acquired through option exercises and restricted stock vesting under registered plans between 2023 and 2026.

How many MRK shares are proposed to be sold and what is their value?

The filing covers a proposed sale of 80,315 MRK common shares with an aggregate market value of $10,718,494.55. This reflects the holder’s planned disposition of previously awarded equity compensation.

When is the MRK stock sale under this Form 144 expected to occur?

The proposed MRK stock sale is dated around 08/12/2026. This date appears as the planned sale date and also as the acquisition date for shares obtained through option exercises funded in cash on the same day.

Through which broker and market will the MRK shares be sold?

The MRK common shares are to be sold through Morgan Stanley Smith Barney LLC Executive Financial Services on the NYSE. This indicates the intended brokerage arrangement and trading venue for the planned disposition.

How were the MRK shares in the Form 144 acquired?

The MRK shares were acquired via exercise of stock options and restricted stock vesting under registered plans. Acquisition dates span from April 2023 to July 2026, with one large vesting of 23,298 shares on 01/22/2024.

How does the proposed MRK sale compare to shares outstanding?

The filing lists MRK common shares outstanding as 2,467,171,638. The proposed sale of 80,315 shares is a small fraction of this baseline figure, which represents total outstanding stock, not the amount being sold.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	80315	10718494.55	2467171638	08/12/2026	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	08/12/2026	Exercise of Options Under a Registered Plan	Issuer			41494	08/12/2026	Cash
Common	08/12/2026	Exercise of Options Under a Registered Plan	Issuer			13433	08/12/2026	Cash
Common	04/11/2023	Restricted Stock Vesting Under a Registered Plan	Issuer			348	04/11/2023	Not Applicable
Common	07/11/2023	Restricted Stock Vesting Under a Registered Plan	Issuer			235	07/11/2023	Not Applicable
Common	10/09/2023	Restricted Stock Vesting Under a Registered Plan	Issuer			248	10/09/2023	Not Applicable
Common	01/09/2024	Restricted Stock Vesting Under a Registered Plan	Issuer			229	01/09/2024	Not Applicable
Common	01/22/2024	Restricted Stock Vesting Under a Registered Plan	Issuer			23298	01/22/2024	Not Applicable
Common	04/08/2024	Restricted Stock Vesting Under a Registered Plan	Issuer			176	04/08/2024	Not Applicable
Common	07/09/2024	Restricted Stock Vesting Under a Registered Plan	Issuer			179	07/09/2024	Not Applicable
Common	10/08/2024	Restricted Stock Vesting Under a Registered Plan	Issuer			209	10/08/2024	Not Applicable
Common	07/08/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			466	07/08/2026	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

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)