X0206 3 2017-03-23 0 0001689923 Alteryx, Inc. AYX 0001574478 Insight Venture Partners VIII, L.P. C/O INSIGHT VENTURE PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 0 0 1 0 0001574465 Insight Venture Partners (Cayman) VIII, L.P. C/O INSIGHT VENTURE PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 0 0 1 0 0001574477 Insight Venture Partners(Delaware) VIII, L.P. C/O INSIGHT VENTURE PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 0 0 1 0 0001578044 Insight Venture Partners VIII (Co-Investors), L.P. C/O INSIGHT VENTURE PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 0 0 1 0 0001607704 Insight Venture Partners Coinvestment Fund III, L.P. C/O INSIGHT VENTURE PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 0 0 1 0 0001607705 Insight Venture Partners Coinvestment Fund (Delaware) III, L.P. C/O INSIGHT VENTURE PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 0 0 1 0 0001658471 Insight Venture Associates VIII, L.P. C/O INSIGHT VENTURE PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 0 0 1 0 0001658537 Insight Venture Associates VIII, Ltd. C/O INSIGHT VENTURE PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 0 0 1 0 0001305473 Insight Holdings Group, LLC C/O INSIGHT VENTURE PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK NY 10036 0 0 1 0 Class B Common Stock Class A Common Stock 2737065 D Class B Common Stock Class A Common Stock 707999 D Class B Common Stock Class A Common Stock 868114 D Class B Common Stock Class A Common Stock 97682 D Class B Common Stock Class A Common Stock 2558905 D Class B Common Stock Class A Common Stock 1851959 D Class B Common Stock Class A Common Stock 4410862 I See footnotes Class B Common Stock Class A Common Stock 4410862 I See footnotes Class B Common Stock Class A Common Stock 8821724 I See footnotes Series B Preferred Stock Class B Common Stock 688504 D Series B Preferred Stock Class B Common Stock 178096 D Series B Preferred Stock Class B Common Stock 218372 D Series B Preferred Stock Class B Common Stock 24572 D Series B Preferred Stock Class B Common Stock 643689 D Series B Preferred Stock Class B Common Stock 465856 D Series B Preferred Stock Class B Common Stock 1109544 I See footnotes Series B Preferred Stock Class B Common Stock 1109544 I See footnotes Series B Preferred Stock Class B Common Stock 2219089 I See footnotes Series C Preferred Stock Class B Common Stock 567700 D Series C Preferred Stock Class B Common Stock 146848 D Series C Preferred Stock Class B Common Stock 180057 D Series C Preferred Stock Class B Common Stock 20261 D Series C Preferred Stock Class B Common Stock 530748 D Series C Preferred Stock Class B Common Stock 384118 D Series C Preferred Stock Class B Common Stock 914866 I See footnotes Series C Preferred Stock Class B Common Stock 914866 I See footnotes Series C Preferred Stock Class B Common Stock 1829732 I See footnotes See Exhibit 99.1 for footnote 1. See Exhibit 99.1 for footnote 2. See Exhibit 99.1 for footnote 3. See Exhibit 99.1 for footnote 4. See Exhibit 99.1 for footnote 5. See Exhibit 99.1 for footnote 6. See Exhibit 99.1 for footnote 7. Due to the limitation on the number of rows allowed on a Form 3, Insight Venture Associates Coinvestment III, L.P., which is the general partner of each of the Insight Coinvestment III Funds (as defined below) and Insight Venture Associates Coinvestment III, Ltd., which in turn is the general partner of Insight Venture Associates Coinvestment III, L.P., who may be deemed to hold beneficial ownership in the shares of the issuer, report such beneficial ownership on a separate Form 3. Exhibit List: Exhibit 99.1 - Explanation of Responses Exhibit 99.2 - Joint Filers' Names and Addresses Exhibit 99.3 - Joint Filers' Signatures /s/ Insight Venture Associates VIII, L.P., its general partner 2017-03-24 /s/ Insight Venture Associates VIII, Ltd., its general partner 2017-03-24