X0306 4 2017-06-28 0001082554 UNITED THERAPEUTICS Corp UTHR 0001237334 CAUSEY CHRISTOPHER C/O UNITED THERAPEUTICS CORPORATION 1040 SPRING STREET SILVER SPRING MD 20910 1 Restricted Stock Units 0 2017-06-28 4 A 0 1620 0 A Common Stock 1620 1620 D Stock Options 132.30 2017-06-28 4 A 0 4210 0 A 2018-06-28 2027-06-28 Common Stock 4210 4210 D Each restricted stock unit represents the right to receive, following vesting, one share of United Therapeutics Corporation common stock. Annual non-employee director grant of restricted stock units and/or stock options, which are awarded and priced each year on the date of the issuer's Annual Meeting of Shareholders. The restricted stock units vest on the one-year anniversary of the grant date only if the reporting person attends at least 75% of the regularly scheduled meetings of the issuer's Board and his or her committee meetings from the date of grant until the date of the issuer's next annual meeting of shareholders. Shares will be issued to the reporting person upon vesting unless the reporting person has elected to defer receipt of shares. Award becomes fully vested on the one-year anniversary of the grant date only if the reporting person attends at least 75% of the regularly scheduled meetings of the issuer's Board and his or her committee meetings from the date of grant until the date of the issuer's next annual meeting of shareholders. /s/ John S. Hess, Jr. under Power of Attorney 2017-06-30