Paul Mahon files Form 144 to sell 8,300 UTHR shares

Paul Mahon reported an intended sale of 8,300 shares of common stock via a stock option exercise to the issuer for cash on 06/04/2026.

Accepted by SEC EDGAR 06/04/2026 - 04:10 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Paul Mahon reported an intended sale of 8,300 shares of common stock via a stock option exercise to the issuer for cash on 06/04/2026. The filing also lists multiple prior sales of 8,300 shares on dates from 03/05/2026 through 05/21/2026 with disclosed sale proceeds.

Key Figures

Intended shares to be sold: 8,300 shares Prior sale proceeds (05/21/2026): $4,671,398.80 Prior sale proceeds (05/07/2026): $4,870,054.05 +4 more

7 metrics

Intended shares to be sold 8,300 shares stock option exercise on <date>06/04/2026</date>

Prior sale proceeds (05/21/2026) $4,671,398.80 sale of 8,300 shares on <date>05/21/2026</date>

Prior sale proceeds (05/07/2026) $4,870,054.05 sale of 8,300 shares on <date>05/07/2026</date>

Prior sale proceeds (04/16/2026) $4,787,596.87 sale of 8,300 shares on <date>04/16/2026</date>

Prior sale proceeds (04/02/2026) $4,696,690.29 sale of 8,300 shares on <date>04/02/2026</date>

Prior sale proceeds (03/19/2026) $4,398,610.73 sale of 8,300 shares on <date>03/19/2026</date>

Prior sale proceeds (03/05/2026) $4,010,187.33 sale of 8,300 shares on <date>03/05/2026</date>

Key Terms

Stock Option Exercise, Issuer, Form 144

3 terms

Stock Option Exercise financial

"Common | 06/04/2026 | 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 | 06/04/2026 | Cash"

Form 144 regulatory

"144: Securities To Be Sold"

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.

FAQ

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

What does Paul Mahon's Form 144 filing for UTHR show?

It shows an intended disposition of 8,300 shares via a stock option exercise to the issuer for cash on 06/04/2026. The filing itemizes prior sales of 8,300 shares on several dates and lists the dollar proceeds for each.

How many shares is Paul Mahon selling in the June 4, 2026 filing?

The filing lists an intended sale of 8,300 shares on 06/04/2026 through a stock option exercise paid in cash. The document repeats the same 8,300 share lot size for prior transactions in March–May 2026.

What proceeds were reported for prior sales by Paul Mahon?

Prior sales of 8,300-share lots show proceeds recorded per sale, for example $4,670,690.29 on 04/02/2026 and $4,671,398.80 on 05/21/2026. Each prior sale line lists date, share class, share count, and gross proceeds.

Does the filing state how the cash proceeds will be used by the seller?

The excerpt lists the sale method as a Stock Option Exercise to the issuer for cash but does not state any use of proceeds by the seller. The filing focuses on transaction method, share counts, dates, and recorded proceeds.

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	4540642.45	42446733	06/04/2026	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	06/04/2026	Stock Option Exercise	Issuer			8300	06/04/2026	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	05/21/2026	8300	4671398.80
PAUL MAHON 1000 SPRING STREET SILVER SPRING MD 20910	Common	05/07/2026	8300	4870054.05
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

144: Remarks and Signature

Remarks
Date of Notice	06/04/2026
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)