Insider plans $3.9M Rule 144 stock sale

An affiliate of UTHR has filed a Form 144 to sell 8,300 common shares, with an aggregate market value of $3,900,121.86.

Accepted by SEC EDGAR 01/15/2026 - 04:06 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

An affiliate of UTHR has filed a Form 144 to sell 8,300 common shares, with an aggregate market value of $3,900,121.86. The proposed sale is to be executed through Morgan Stanley Smith Barney LLC on the NASDAQ, with an approximate sale date of 01/15/2026. The shares were acquired on the same date via a stock option exercise paid in cash.

The notice also lists prior sales by Paul Mahon over the past three months, including several transactions of 11,000 common shares each between October and December 2025 and an additional 8,300-share sale on 01/02/2026, with individual gross proceeds in the several-million-dollar range. The filer represents that they are not aware of undisclosed material adverse information about the issuer.

FAQ

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

What does the UTHR Form 144 filing disclose?

It discloses a planned sale under Rule 144 of 8,300 shares of common stock, with an aggregate market value of $3,900,121.86, to be executed on or about 01/15/2026.

How were the 8,300 UTHR shares being sold acquired?

The 8,300 common shares were acquired on 01/15/2026 through a stock option exercise from the issuer, with the purchase price paid in cash.

Which broker will handle the planned UTHR share sale?

The planned sale will be handled by Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004.

On which exchange is the planned UTHR stock sale to occur?

The Form 144 indicates that the 8,300 common shares are expected to be sold on the NASDAQ exchange.

How many UTHR shares are outstanding according to this Form 144?

The filing reports that there are 43,056,599 common shares outstanding for the issuer.

What prior UTHR stock sales are reported for the past 3 months?

The notice lists several sales by Paul Mahon, including multiple 11,000-share common stock sales between 10/16/2025 and 12/24/2025, and an 8,300-share sale on 01/02/2026, each with multi-million-dollar gross proceeds.

What representation does the seller make in this UTHR Form 144?

The seller represents that they do not know any material adverse information about the issuer’s current or prospective operations that has not been publicly disclosed.

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	3900121.86	43056599	01/15/2026	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	01/15/2026	Stock Option Exercise	Issuer			8300	01/15/2026	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	12/24/2025	11000	5644953.60
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	12/11/2025	11000	5331316.10
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	11/26/2025	11000	5346700.70
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	11/13/2025	11000	5112334.70
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	10/30/2025	11000	4953759.80
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	10/16/2025	11000	4746493.40
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	01/02/2026	8300	4029076.47

144: Remarks and Signature

Remarks
Date of Notice	01/15/2026
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)