GAAP to Non-GAAP Reconciliations FYE December 31 | $ in thousands Three months Three months ASC 605 ASC 606 ended Dec 31, ended Dec 31, 1 1 1 1 1 2020 2019 2017 2018 2019 2020 GAAP research & development expense $29,342 $43,449 $69,100 $101,117 $26,448 $20,892 Stock-based compensation (1,635) (3,699) (6,954) $(18,388) (5,973) (2,940) Non-GAAP research & development $27,707 $39,750 $62,146 $82,729 $20,475 $17,952 expense As margin % Total revenue $131,607 $253,570 $417,910 $495,308 $160,527 $156,450 GAAP research & development 22% 17% 17% 20% 16% 13% Non-GAAP research & development 21% 16% 15% 17% 13% 11% 1 Alteryx adopted the new revenue recognition accounting standard Accounting Standards Codification (“ASC”) 606 effective January 1, 2018 on a modified retrospective basis. Financial results for the 2018 and 2019 reporting periods are presented in accordance with the new revenue recognition standard. Historical financial results for the reporting periods prior to 2018 are presented in conformity with amounts previously disclosed under the prior revenue recognition standard ASC 605. Confidential │ ©2021 Alteryx, Inc. 39