X0306 4 2018-09-10 0 0001689923 Alteryx, Inc. AYX 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 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 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 Class A Common Stock 2018-09-10 4 C 0 310264 A 519693 I See Footnotes Class A Common Stock 2018-09-10 4 C 0 80257 A 134430 I See Footnotes Class A Common Stock 2018-09-10 4 C 0 98406 A 164830 I See Footnotes Class A Common Stock 2018-09-10 4 C 0 11073 A 18547 I See Footnotes Class A Common Stock 2018-09-10 4 J 0 310264 D 209429 I See Footnotes Class A Common Stock 2018-09-10 4 J 0 80257 D 54173 I See Footnotes Class A Common Stock 2018-09-10 4 J 0 98406 D 66424 I See Footnotes Class A Common Stock 2018-09-10 4 J 0 11073 D 7474 I See Footnotes Class A Common Stock 2018-09-10 4 J 0 762 A 762 I See Footnotes Class B Common Stock 2018-09-10 4 C 0 310264 D Class A Common Stock 310264 2286817 D Class B Common Stock 2018-09-10 4 C 0 80257 D Class A Common Stock 80257 591532 D Class B Common Stock 2018-09-10 4 C 0 98406 D Class A Common Stock 98406 725308 D Class B Common Stock 2018-09-10 4 C 0 11073 D Class A Common Stock 11073 81614 D See Exhibit 99.1 See Exhibit 99.1 See Exhibit 99.1 See Exhibit 99.1 See Exhibit 99.1 See Exhibit 99.1 See Exhibit 99.1 See Exhibit 99.1 This Form 4 is one of two Forms 4 filed relating to the same event. The Form 4 has been split into two filings because there are more than 10 reporting persons in total, and the SEC's EDGAR filing system limits a single Form 4 to a maximum of 10 reporting person. Each Form 4 is filed by Designated Filer, Insight Holdings Group, LLC. Exhibit 99.1 - Explanation of Responses Exhibit 99.2 - Joint Filers' Names and Addresses Exhibit 99.3 - Joint Filers' Signatures /s/ INSIGHT HOLDINGS GROUP, LLC 2018-09-12