GAAP to Non-GAAP Reconciliations FYE December 31 | $ in thousands ASC 606 ASC 605 1 1 1 2017 2018 2019 2020 GAAP gross profit $109,804 $230,770 $378,759 $451,469 Stock-based compensation 485 797 1,634 2,550 Amortization of intangible assets 1,213 1,809 3,801 3,758 Impairment of intangible assets 2,025 Non-GAAP gross profit $111,502 $233,376 $384,194 $459,802 As margin % Total revenue $131,607 $253,570 $417,910 $495,308 GAAP gross margin 83% 91% 91% 91% Non-GAAP gross margin 85% 92% 92% 93% 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. 38