Paul Mahon files Form 144 to sell 8,300 shares

Paul Mahon submitted Form 144 notices reporting proposed sales and a stock option exercise involving 8,300 shares.

Accepted by SEC EDGAR 04/02/2026 - 04:08 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Paul Mahon submitted Form 144 notices reporting proposed sales and a stock option exercise involving 8,300 shares. The filing lists multiple past sales of 8,300 shares on 01/15/2026, 02/05/2026, 02/19/2026, 03/05/2026, and 03/19/2026 with dollar amounts shown. The entry for 04/02/2026 is labeled Stock Option Exercise with Cash and Issuer indicated.

Insights

Equity Capital Markets Analyst

Form 144 notices record repeated 8,300-share transactions and a same-size option exercise.

The filing lists multiple sales of 8,300 shares on discrete dates with dollar amounts attached, and a separate line for a Stock Option Exercise on 04/02/2026. These are routine transfer and sale notices under resale rules.

Cash treatment and the label Issuer appear in the exercise row; timing and broader holding context are not provided in the excerpt, so further filings would clarify net position and any plan-based selling.

Key Figures

Per-transaction shares: 8,300 shares Sale date: 01/15/2026 Sale date: 02/05/2026 +4 more

7 metrics

Per-transaction shares 8,300 shares listed for each sale and the exercise row

Sale date 01/15/2026 past sale of 8,300 shares

Sale date 02/05/2026 past sale of 8,300 shares

Sale date 02/19/2026 past sale of 8,300 shares

Sale date 03/05/2026 past sale of 8,300 shares

Sale date 03/19/2026 past sale of 8,300 shares

Option exercise date 04/02/2026 Stock Option Exercise row for 8,300 shares, settled in Cash with Issuer indicated

Key Terms

Form 144, Stock Option Exercise, Issuer, Cash

4 terms

Form 144 regulatory

"Filed notice reporting proposed sale of securities (Form 144 context)"

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

"Line item labeled "Stock Option Exercise" dated 04/02/2026"

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 financial

"Exercise row shows "Issuer" in method/recipient column"

Cash financial

"Exercise row shows settlement method as "Cash""

FAQ

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

What does Paul Mahon's Form 144 for UTHR report?

It reports notices to sell and an option exercise involving 8,300 shares. The filing lists multiple dated sales and a separate Stock Option Exercise entry dated 04/02/2026, with cash indicated for the exercise.

How many shares does each transaction involve in the Form 144?

Each listed transaction involves 8,300 shares. The excerpt shows five past sale dates and a separate exercise row, all showing the same 8,300 shares quantity.

Which dates are shown for the past sales in the filing?

The filing shows sales dated 01/15/2026, 02/05/2026, 02/19/2026, 03/05/2026, and 03/19/2026. Each date is paired with an 8,300-share row and an associated dollar amount in the excerpt.

Does the Form 144 specify how the exercise was settled?

Yes; the exercise row is labeled Stock Option Exercise and shows Cash and Issuer in the method columns. The excerpt does not provide additional settlement details.

Are dollar amounts shown for the past sales in the Form 144 excerpt?

Yes; each past sale row in the excerpt includes a dollar figure alongside the 8,300-share entry. These amounts appear next to each dated sale line in the provided content.

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	4696690.29	43827686	04/02/2026	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	04/02/2026	Stock Option Exercise	Issuer			8300	04/02/2026	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	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
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

144: Remarks and Signature

Remarks
Date of Notice	04/02/2026
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/ Paul A. Mahon
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)