X0306 4 2018-04-11 0 0001689923 Alteryx, Inc. AYX 0001699950 Stoecker Dean C/O ALTERYX, INC. 3345 MICHELSON DRIVE, SUITE 400 IRVINE CA 92612 1 1 0 0 Chairman of the Board & CEO Class A Common Stock 2018-04-11 4 S 0 20000 33.72 D 220000 I By DBRA, Limited Partnership Class A Common Stock 2018-04-12 4 S 0 20000 34.26 D 200000 I By DBRA, Limited Partnership Sale of shares made pursuant to and in accordance with the requirements of Rule 10b5-1 under the Securities Exchange Act of 1934, as amended, under a plan adopted by the Reporting Person on September 11, 2017. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.14 to $34.31, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4. The Reporting Person serves as the general partner of DBRA, Limited Partnership ("DBRA"), and pursuant to the provisions of the partnership agreement of DBRA, has voting and dispositive authority with respect to the shares owned by DBRA. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.85 to $34.66, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4. /s/ Christopher M. Lal, by power of attorney 2018-04-13