X0306 4 2019-03-18 0001082554 UNITED THERAPEUTICS Corp UTHR 0001106578 ROTHBLATT MARTINE A C/O UNITED THERAPEUTICS CORPORATION 1040 SPRING STREET SILVER SPRING MD 20910 1 1 Chairman & CEO Common Stock 2019-03-18 4 M 0 7055 52.65 A 7195 D Common Stock 2019-03-18 4 D 0 500 117.608 D 6695 D Common Stock 2019-03-18 4 D 0 6344 118.4831 D 351 D Common Stock 2019-03-18 4 D 0 211 119.1831 D 140 D Common Stock 2019-03-19 4 M 0 7055 52.65 A 7195 D Common Stock 2019-03-19 4 D 0 4755 118.7283 D 2440 D Common Stock 2019-03-19 4 D 0 2300 119.6247 D 140 D Common Stock 166 I By Spouse Common Stock 683489 I By Trusts Stock Options 52.65 2019-03-18 4 M 0 7055 0 D 2009-12-31 2019-12-31 Common Stock 7055 7055 D Stock Options 52.65 2019-03-19 4 M 0 7055 0 D 2009-12-31 2019-12-31 Common Stock 7055 0 D This exercise of share tracking awards was pursuant to a Rule 10b5-1 trading plan entered into by the reporting person. This transaction was executed in multiple trades at prices ranging from $117.07 to $118.03. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This transaction was executed in multiple trades at prices ranging from $118.12 to $119.04. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This transaction was executed in multiple trades at prices ranging from $119.13 to $119.24. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This transaction was executed in multiple trades at prices ranging from $118.25 to $119.24. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This transaction was executed in multiple trades at prices ranging from $119.26 to $120.05. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. /s/ John S. Hess, Jr. under Power of Attorney 2019-03-19