Form 144 shows planned sale of 18,406 shares

A person filing on behalf of RYTM has submitted a Form 144 notice covering a planned sale of 18,406 shares of common stock through Morgan Stanley Smith Barney on the NASDAQ, with an approximate sale date of February 5, 2026.

Accepted by SEC EDGAR 02/05/2026 - 04:30 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

A person filing on behalf of RYTM has submitted a Form 144 notice covering a planned sale of 18,406 shares of common stock through Morgan Stanley Smith Barney on the NASDAQ, with an approximate sale date of February 5, 2026. The shares have an indicated aggregate market value of $1,987,295.82, compared with 66,736,056 shares of common stock outstanding. These shares were acquired as restricted stock units from the issuer on February 10, 2025. The form also notes a prior Rule 10b5-1 sale for Hunter Smith of 3,247 common shares on February 4, 2026, generating gross proceeds of $344,145.31.

FAQ

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

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

The Form 144 covers a planned sale of 18,406 shares of RYTM common stock. These shares are to be sold through Morgan Stanley Smith Barney on the NASDAQ, with an approximate sale date of February 5, 2026 and an indicated aggregate market value of $1,987,295.82.

What is the aggregate market value of the RYTM shares to be sold?

The planned sale involves RYTM common shares with an aggregate market value of $1,987,295.82. This value is based on the 18,406 shares listed in the Form 144 and reflects the market pricing used when the notice was prepared.

When and how were the RYTM shares in this Form 144 acquired?

The 18,406 RYTM common shares were acquired on February 10, 2025 as restricted stock units from the issuer. The form identifies the issuer as the source and notes the nature of the acquisition transaction as restricted stock units, with the same date for acquisition and payment.

What prior RYTM stock sales are disclosed for the past three months?

The notice reports 10b5-1 sales for Hunter Smith of 3,247 RYTM common shares on February 4, 2026. These sales generated $344,145.31 in gross proceeds and are the only past-three-month transactions shown in the provided table.

On which exchange will the RYTM shares in this Form 144 be sold?

The planned sale of 18,406 RYTM common shares is listed for the NASDAQ exchange. The broker named is Morgan Stanley Smith Barney Executive Financial Services, with the sale structured under Rule 144 as disclosed in the filing tables.

How many RYTM shares are outstanding compared to the Form 144 sale amount?

The form states that 66,736,056 RYTM common shares are outstanding. The planned sale covers 18,406 shares, providing a baseline reference for the size of this potential transaction relative to the total shares outstanding.

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

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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	0001636385
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	RHYTHM PHARMACEUTICALS INC
SEC File Number	001-38223
Address of Issuer	222 Berkeley Street, 12th Floor BOSTON MASSACHUSETTS 02116
Phone	8572644280
Name of Person for Whose Account the Securities are To Be Sold	HUNTER SMITH
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	18406	1987295.82	66736056	02/05/2026	NASDAQ

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	02/10/2025	Restricted Stock Units	Issuer			18406	02/10/2025	N/A

* 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
10b5-1 Sales for HUNTER SMITH 222 Berkeley Street, 12th Floor BOSTON MA 02116	Common	02/04/2026	3247	344145.31

144: Remarks and Signature

Remarks	The securities to be sold were or will be acquired upon the vesting of restricted stock units during the period of 02/10/2025 through 02/16/2026.
Date of Notice	02/05/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	02/28/2025
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/ Hunter Smith
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)