X0202 SCHEDULE 13G/A 0001106578 XXXXXXXX LIVE 7 Common Stock, par value $.01 per share 06/30/2026 0001082554 UNITED THERAPEUTICS Corp 91307C102 1000 Spring Street Silver Spring MD 20910 Rule 13d-1(d) ROTHBLATT MARTINE A X1 843023.00 1490698.00 843023.00 1490698.00 2333721.00 N 5.3 IN UNITED THERAPEUTICS Corp 1000 Spring Street, Silver Spring, MD 20910 Martine A. Rothblatt 1000 Spring Street Silver Spring, MD 20910 United States of America Y 2,333,721 shares 5.3% 843,023 1,490,698 843,023 1,490,698 The shares beneficially owned by Dr. Rothblatt include currently exercisable options to purchase 793,868 shares held directly by Dr. Rothblatt and currently exercisable options to purchase 849,192 shares held by a family trust over which Dr. Rothblatt shares investment power and voting power. Also includes 8,642 shares held indirectly by trusts over which Dr. Rothblatt has sole investment power and sole voting power, 249,108 shares held indirectly by trusts over which Dr. Rothblatt's spouse has investment power and voting power, 233,493 shares held indirectly by trusts over which Dr. Rothblatt and her spouse have shared investment power and shared voting power, 91,210 additional shares held indirectly by trusts over which Dr. Rothblatt has shared investment power and shared voting power, 45,596 additional shares held indirectly by trusts over which Dr. Rothblatt's spouse has shared investment power and shared voting power, 166 shares held directly by Dr. Rothblatt's spouse, and 21,933 shares held by charitable organizations over which Dr. Rothblatt has shared investment and shared voting power. Y N Various individuals and entities are beneficiaries of or co-trustees of certain of the trusts. Other individuals are directors of the charitable organizations and the charitable organizations are the beneficiaries of the shares owned by them. Y Y Y Y ROTHBLATT MARTINE A /s/ Martine A. Rothblatt 08/14/2026