X0508 4 2025-11-05 1 0001441683 APPIAN CORP APPN 0001706796 Winters Christopher C/O APPIAN CORPORATION 7950 JONES BRANCH DRIVE MCLEAN VA 22102 0 1 0 0 General Counsel 0 Class A Common Stock 2025-11-05 4 M 0 6104 0 A 31609 D Class A Common Stock 2025-11-05 4 F 0 1827 29.33 D 29782 D Restricted Stock Unit 2025-11-05 4 M 0 1234 0 D Class A Common Stock 1234 1234 D Restricted Stock Unit 2025-11-05 4 M 0 1591 0 D Class A Common Stock 1591 3182 D Restricted Stock Unit 2025-11-05 4 M 0 1656 0 D Class A Common Stock 1656 0 D Restricted Stock Unit 2025-11-05 4 M 0 1623 0 D Class A Common Stock 1623 4869 D Each Restricted Stock Unit ("RSU") converts into Class A Common Stock on a one-for-one basis. Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock (or its cash equivalent, at the discretion of the Issuer). The RSUs were granted on August 2, 2022, and vest in four (4) equal installments commencing on November 6, 2023, provided that the Reporting Person has provided continuous service to the Issuer through such vesting date. The RSUs were granted on October 31, 2023, and vest in four (4) equal installments commencing on November 5, 2024, provided that the Reporting Person has provided continuous service to the Issuer through such vesting date. The RSUs were granted on November 5, 2024, and vested on November 5, 2025. The RSUs were granted on November 5, 2024, and vest in four (4) equal annual installments commencing on November 5, 2025, provided that the Reporting Person has provided continuous service to the Issuer through such vesting date. /s/ Angela Patterson, Attorney-in-Fact 2025-11-06