8,300-share proposed sale reported for United Therapeutics (NASDAQ: UTHR)

Rhea-AI Filing Summary

Paul Mahon submitted a Form 144 notice to sell 8,300 shares of Common Stock associated with a Stock Option Exercise dated 05/07/2026. The filing lists prior sales of 8,300-share blocks on 04/16/2026, 04/02/2026, 03/19/2026, 03/05/2026, and 02/19/2026.

Key Figures

Shares proposed for sale: 8,300 shares Prior identical sales listed: 5 instances of 8,300 shares Numeric figure adjacent to 05/07/2026 row: 4870054.05 +1 more

4 metrics

Shares proposed for sale 8,300 shares Stock Option Exercise dated 05/07/2026

Prior identical sales listed 5 instances of 8,300 shares Dates: 04/16/2026; 04/02/2026; 03/19/2026; 03/05/2026; 02/19/2026

Numeric figure adjacent to 05/07/2026 row 4870054.05 Value listed in the securities information line for 05/07/2026

Exchange listed NASDAQ Securities line shows trading venue

Key Terms

Form 144, Stock Option Exercise, Issuer

3 terms

Form 144 regulatory

"submitted a Form 144 notice to sell 8,300 shares"

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.

Stock Option Exercise financial

"Common | 05/07/2026 | Stock Option Exercise | Issuer"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

Issuer regulatory

"Stock Option Exercise | Issuer | 8300 | 05/07/2026"

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	8300	4870054.05	42446733	05/07/2026	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	05/07/2026	Stock Option Exercise	Issuer			8300	05/07/2026	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	04/16/2026	8300	4787596.87
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	04/02/2026	8300	4696690.29
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	03/19/2026	8300	4398610.73
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	03/05/2026	8300	4010187.33
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	02/19/2026	8300	3953587.97

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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)

FAQ

What does the UTHR Form 144 filed by Paul Mahon report?

It reports a proposed sale of 8,300 shares via stock option exercise dated 05/07/2026. The notice lists identical 8,300-share transactions on several prior dates, indicating repeated block sales by the same filer.

Who is identified as the broker or placement agent in the UTHR Form 144?

Morgan Stanley Smith Barney LLC Executive Financial Services is named in the filing. The entry appears alongside the security line for the 8,300-share sale dated 05/07/2026.

How many prior sales are listed in the Paul Mahon Form 144 excerpt for UTHR?

The excerpt lists five prior sales of 8,300 shares on 04/16/2026, 04/02/2026, 03/19/2026, 03/05/2026, and 02/19/2026, each recorded with an 8,300-share size in the table.

Does the Form 144 excerpt disclose proceeds or dollar amounts for the transactions?

Yes — amounts appear next to the security lines. The excerpt shows figures such as 4870054.05 near the 8,300-share row dated 05/07/2026 and similar numeric entries for prior dates.