Notice of Proposed Sale · 144

United Therapeutics Corporation

UTHRNASDAQEQUITYCurrent

Notice of Proposed Sale

Filed Oct 1, 2026Accepted Oct 1, 2026, 4:37 PM EDTFiling CIK 1106578Accession 0001950047-26-009982

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Structured filing — 144

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer: UNITED THERAPEUTICS CORP
Issuer CIK: 0001082554
SEC file number: 000-26301
Phone: 3016089292
Person for whose account securities are to be sold: MARTINE ROTHBLATT
Relationships to issuer: Director · Officer
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Securities proposed for sale

Securities proposed for sale · 1 reported row
Security	Proposed units	Aggregate market value	Units outstanding	Approximate sale date	Exchange	Broker / market maker
Common	209,000	113,255,010.00	42,890,692	10/01/2026	NASDAQ	Morgan Stanley Smith Barney LLC Executive Financial Services

Broker / market maker — proposed row 1, entry 1

Name: Morgan Stanley Smith Barney LLC Executive Financial Services
Street: 1 New York Plaza
Street (continued): 8th Floor
City: New York
State / country code: NY
Postal code: 10004

Acquisition of securities to be sold

Acquisition of securities to be sold · 1 reported row
Security	Acquired	Nature of acquisition	Acquired from	Amount acquired	Gift transaction	Payment date	Nature of payment
Common	10/01/2026	Exercise of Stock Options	Issuer	209,000	N	10/01/2026	Cash

Sales reported in the preceding three months

Sales reported in the preceding three months · 63 reported rows
Seller	Security	Sale date	Amount sold	Gross proceeds
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/30/2026	9,500	4,982,601.80
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/29/2026	9,500	4,535,479.55
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/28/2026	9,500	4,568,106.35
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/25/2026	9,500	4,523,634.95
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/24/2026	9,500	4,498,752.55
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/23/2026	9,500	4,669,917.85
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/22/2026	9,500	4,700,850.80
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/21/2026	9,500	4,698,270.60
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/18/2026	9,500	4,700,505.00
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/17/2026	9,500	4,712,580.45
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/16/2026	9,500	4,763,172.70
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/15/2026	9,500	4,765,119.25
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/14/2026	9,500	4,789,151.40
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/11/2026	9,500	4,757,773.85
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/10/2026	9,500	4,772,295.55
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/09/2026	9,500	4,767,466.70
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/08/2026	9,500	4,740,795.45
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/04/2026	9,500	4,647,354.40
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/03/2026	9,500	4,631,619.55
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/02/2026	9,500	4,687,841.50
10b5-1 Sales for MARTINE ROTHBLATT	Common	09/01/2026	9,500	4,883,838.85
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/31/2026	9,500	4,855,312.25
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/28/2026	9,500	4,916,363.05
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/27/2026	9,500	4,964,376.05
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/26/2026	9,500	4,914,189.45
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/25/2026	9,500	4,918,273.50
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/24/2026	9,500	4,863,730.20
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/21/2026	9,500	4,924,666.05
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/20/2026	9,500	4,949,716.60
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/19/2026	9,500	5,006,103.85
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/18/2026	9,500	4,898,220.90
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/17/2026	9,500	4,812,567.95
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/14/2026	9,500	4,739,664.00
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/13/2026	9,500	4,790,316.10
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/12/2026	9,500	4,892,747.95
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/11/2026	9,500	4,967,291.60
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/10/2026	9,500	5,036,073.50
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/07/2026	9,500	5,048,137.55
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/06/2026	9,500	4,990,873.45
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/05/2026	9,500	4,927,985.35
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/04/2026	9,500	4,912,310.35
10b5-1 Sales for MARTINE ROTHBLATT	Common	08/03/2026	9,500	4,902,569.05
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/31/2026	9,500	4,930,098.15
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/30/2026	9,500	4,986,593.70
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/29/2026	9,500	4,962,487.45
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/28/2026	9,500	5,003,975.85
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/27/2026	9,500	5,038,971.00
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/24/2026	9,500	5,051,518.60
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/23/2026	9,500	5,021,519.50
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/22/2026	9,500	5,040,379.85
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/21/2026	9,500	5,056,298.05
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/20/2026	9,500	5,051,035.05
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/17/2026	9,500	5,101,938.90
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/16/2026	9,500	5,043,688.70
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/15/2026	9,500	5,038,340.20
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/14/2026	9,500	5,004,908.75
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/13/2026	9,500	5,091,949.65
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/10/2026	9,500	5,173,659.15
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/09/2026	9,500	5,235,755.90
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/08/2026	9,500	5,255,111.20
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/07/2026	9,500	5,309,295.40
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/06/2026	9,500	5,215,133.30
10b5-1 Sales for MARTINE ROTHBLATT	Common	07/02/2026	9,500	5,268,780.75

Seller — prior-sale row 1, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 2, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 3, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 4, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 5, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 6, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 7, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 8, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 9, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 10, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 11, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 12, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 13, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 14, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 15, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 16, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 17, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 18, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 19, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 20, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 21, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 22, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 23, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 24, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 25, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 26, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 27, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 28, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 29, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 30, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 31, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 32, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 33, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 34, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 35, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 36, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 37, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 38, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 39, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 40, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 41, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 42, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 43, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 44, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 45, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 46, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 47, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 48, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 49, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 50, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 51, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 52, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 53, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 54, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 55, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 56, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 57, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 58, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 59, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 60, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 61, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 62, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Seller — prior-sale row 63, entry 1

Name: 10b5-1 Sales for MARTINE ROTHBLATT
Street: 1000 SPRING ST
City: SILVER SPRING
State / country code: MD
Postal code: 20910

Prior-sale reporting

Nothing to report for the preceding three months: N

Remarks

Shares sold by Martine Rothblatt and/or the Martine Rothblatt Property Management Trust, which is beneficially owned by Martine Rothblatt, who is an officer of the issuer.

Notice signature

Notice date: 10/01/2026
Signed: /s/ Martine Rothblatt
Plan adoption dates: 11/21/2025

Company context

Founded by CEO Martine Rothblatt to discover a cure for her daughter's life-threatening rare disease, pulmonary arterial hypertension, United Therapeutics transforms the treatment of rare diseases and pioneers alternatives to expand the supply of transplantable organs. From our innovative therapies to our groundbreaking manufactured organs, we are bold and unconventional. We move quickly from scientific theory to practical technologies that can save lives. As a public benefit corporation, even our legal structure reflects our commitments. We serve patients, act with integrity, create long-term shareholder value, and operate with sustainable practices that protect the future we are working to build.

Current securities

UTHRNASDAQ · EQUITY · Current