Form 144: Proposed sale of UTHR shares by insiders

Morgan Stanley Smith Barney LLC files Form 144 to sell common shares of UTHR via stock option exercises.

Accepted by SEC EDGAR 03/05/2026 - 04:03 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC files Form 144 to sell common shares of UTHR via stock option exercises. The notice lists multiple proposed sales dated 03/05/2026 and earlier, with individual transactions showing share quantities (8,300 and 11,000) and aggregate proceeds listed per trade.

FAQ

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

What does the UTHR Form 144 filing show?

It reports proposed sales of UTHR common stock by Morgan Stanley Smith Barney LLC and Paul Mahon. The filing lists stock option exercises and multiple sales dated 12/11/2025 through 03/05/2026 with shares of 8,300 and 11,000 recorded.

How many shares are listed in the largest single sale on the filing for UTHR?

The largest single sale recorded shows 11,000 shares. Two transactions on 12/24/2025 and 12/11/2025 list 11,000 shares each with associated proceeds displayed in the filing.

Who is the reported selling person in the UTHR Form 144 entries?

Paul Mahon is listed as the selling person for multiple transactions. The filing also lists Morgan Stanley Smith Barney LLC as the issuer/agent for a stock option exercise on 03/05/2026 with cash consideration noted.

Do the Form 144 entries disclose cash proceeds for the UTHR sales?

Yes, the filing shows dollar proceeds associated with each sale. Examples include $3,953,587.97 for an 8,300-share entry and $5,644,953.60 for an 11,000-share entry as listed in the filing.

Does the filing state the sale method or reason for the UTHR transactions?

The filing lists transaction types such as "Stock Option Exercise" and indicates cash as the payment method. It does not provide further explanatory reasons or additional context beyond the transaction dates and amounts.

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	0001231589
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	UNITED THERAPEUTICS CORPORATION
SEC File Number	000-26301
Address of Issuer	1000 SPRING STREET SILVER SPRING MARYLAND 20910
Phone	(301) 608-9292
Name of Person for Whose Account the Securities are To Be Sold	PAUL MAHON
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	8300	4010187.33	43827686	03/05/2026	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	03/05/2026	Stock Option Exercise	Issuer			8300	03/05/2026	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	02/19/2026	8300	3953587.97
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	02/05/2026	8300	4010939.31
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	01/15/2026	8300	3900121.86
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	01/02/2026	8300	4029076.47
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	12/24/2025	11000	5644953.60
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	12/11/2025	11000	5331316.10

144: Remarks and Signature

Remarks
Date of Notice	03/05/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	08/11/2025
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/ Paul A. Mahon
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)