RYTM plans sale of common stock under Form 144

RYTM filed a notice of proposed sale of common stock, to be executed through Morgan Stanley Smith Barney LLC Executive Financial Services on the NASDAQ.

Rhea-AI Filing Summary

RYTM filed a notice of proposed sale of common stock, to be executed through Morgan Stanley Smith Barney LLC Executive Financial Services on the NASDAQ. The securities information section lists 75,834 shares, including 56,601 shares tied to an Exercise of Stock Options dated August 13, 2026, and 19,233 shares related to Restricted Stock Units dated February 11, 2024.

Key Figures

Common shares listed in securities section: 75,834 shares Shares from stock option exercise: 56,601 shares Shares from restricted stock units: 19,233 shares +2 more

5 metrics

Common shares listed in securities section 75,834 shares Number of common shares shown in the Form 144 securities information row

Shares from stock option exercise 56,601 shares Exercise of Stock Options dated August 13, 2026 in securities-to-be-sold section

Shares from restricted stock units 19,233 shares Restricted Stock Units dated February 11, 2024 in securities-to-be-sold section

Reported value associated with securities 8,918,078.40 Value figure shown alongside 75,834 shares in the securities information row

Additional numeric figure in securities row 68,852,082 Numeric field appearing with the common stock entry in securities information

Key Terms

Form 144, Exercise of Stock Options, Restricted Stock Units, Executive Financial Services

4 terms

Form 144 regulatory

"Filer Information | | | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Exercise of Stock Options financial

"Common | 08/13/2026 | Exercise of Stock Options | Issuer"

Restricted Stock Units financial

"Common | 02/11/2024 | Restricted Stock Units | Issuer"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Executive Financial Services financial

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

FAQ

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

What does the Form 144 filing by RYTM indicate?

The Form 144 indicates a proposed sale of common stock of RYTM. It lists a total of 75,834 shares in the securities section, to be sold through Morgan Stanley Smith Barney LLC Executive Financial Services on the NASDAQ market.

How many RYTM shares relate to stock option exercises in this Form 144?

The filing shows 56,601 RYTM common shares linked to an Exercise of Stock Options. These are scheduled under the securities-to-be-sold section with an option exercise date of August 13, 2026 and a cash exercise method.

How many RYTM shares in the Form 144 come from restricted stock units?

The Form 144 lists 19,233 RYTM common shares associated with Restricted Stock Units. These RSUs have a date of February 11, 2024 and are classified under the securities-to-be-sold section with an "N/A" payment method.

Which broker is handling the proposed RYTM stock sale?

The proposed sale of RYTM common stock is to be handled by Morgan Stanley Smith Barney LLC Executive Financial Services. The broker’s address is listed as 1 New York Plaza, 8th Floor, New York, NY 10004 in the securities information section.

On which exchange are the RYTM shares in this Form 144 expected to trade?

The shares referenced in this Form 144 are associated with trading on the NASDAQ. The securities information row for common stock explicitly identifies NASDAQ as the market where these RYTM shares are expected to be sold.

What key dates are associated with the RYTM Form 144 transactions?

Key dates include August 13, 2026 for the Exercise of Stock Options and planned sale, and February 11, 2024 for the Restricted Stock Units. These dates appear in the securities-to-be-sold section of the filing.

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

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Available on EDGAR 08/13/2026 - 04:40 PM Accepted by SEC EDGAR 08/13/2026 - 04:39 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	0001801372
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	Jennifer Kayden Lee
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	75834	8918078.40	68852082	08/13/2026	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	08/13/2026	Exercise of Stock Options	Issuer			56601	08/13/2026	Cash
Common	02/11/2024	Restricted Stock Units	Issuer			19233	02/11/2024	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

Nothing to Report

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 2/11/2024 through 2/1/2026
Date of Notice	08/13/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/14/2026
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 Kayden Lee
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)