X0306 4 2018-08-13 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 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 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 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 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 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 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 A Common Stock 2018-08-13 4 S 0 55084 55.40 D 930005 D Class A Common Stock 2018-08-13 4 S 0 14249 55.40 D 240565 D Class A Common Stock 2018-08-13 4 S 0 17471 55.40 D 294969 D Class A Common Stock 2018-08-13 4 S 0 1966 55.40 D 33190 D Class A Common Stock 2018-08-13 4 S 0 51499 55.40 D 869469 D Class A Common Stock 2018-08-13 4 S 0 37271 55.40 D 629262 D Class A Common Stock 2018-08-13 4 S 0 88770 55.40 D 1498729 I See footnote Class A Common Stock 2018-08-13 4 S 0 88770 55.40 D 1498729 I See footnote Class A Common Stock 2018-08-13 4 S 0 177540 55.40 D 2997460 I See footnote Class A Common Stock 2018-08-13 4 S 0 129678 55.72 D 800327 D Class A Common Stock 2018-08-13 4 S 0 33544 55.72 D 207021 D Class A Common Stock 2018-08-13 4 S 0 41130 55.72 D 253839 D Class A Common Stock 2018-08-13 4 S 0 4628 55.72 D 28562 D Class A Common Stock 2018-08-13 4 S 0 121237 55.72 D 748232 D Class A Common Stock 2018-08-13 4 S 0 87743 55.72 D 541519 D Class A Common Stock 2018-08-13 4 S 0 208980 55.72 D 1289749 I See footnote Class A Common Stock 2018-08-13 4 S 0 208980 55.72 D 1289749 I See footnote Class A Common Stock 2018-08-13 4 S 0 417960 55.72 D 2579500 I See footnote See Exhibit 99.1 See Exhibit 99.1 See Exhibit 99.1 See Exhibit 99.1 See Exhibit 99.1 Due to the limitation on the number of rows allowed on a Form 4, Insight Venture Associates Coinvestment III, L.P. and Insight Venture Associates Coinvestment III, Ltd. report on a separate Form 4. Exhibit List: Exhibit 99.1 - Explanation of Responses Exhibit 99.2 - Joint Filers' Names and Addresses Exhibit 99.3 - Joint Filers' Signatures INSIGHT VENTURE PARTNERS VIII, L.P. By: Insight Venture Associates VIII, L.P., its general partner By: Insight Venture Associates VIII, Ltd., its general partner 2018-08-15