X0306 4 2021-07-06 0 0001348036 AVALARA, INC. AVLR 0001235461 PINNEY ALESIA LEE 255 SOUTH KING ST. SUITE 1800 SEATTLE WA 98104 0 1 0 0 See Remarks Common Stock 2021-07-06 4 M 0 932 16.60 A 40524 D Common Stock 2021-07-06 4 M 0 463 39.76 A 40987 D Common Stock 2021-07-06 4 M 0 242 67.27 A 41229 D Common Stock 2021-07-06 4 S 0 1637 161.36 D 39592 D Stock Option (right to buy) 16.60 2021-07-06 4 M 0 932 0.00 D 2028-01-23 Common Stock 932 9317 D Stock Option (right to buy) 39.76 2021-07-06 4 M 0 463 0.00 D 2029-01-28 Common Stock 463 10186 D Stock Option (right to buy) 67.27 2021-07-06 4 M 0 242 0.00 D 2030-03-12 Common Stock 242 7757 D The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 11, 2020. 25% of the total shares subject to the option vested and became exercisable on January 1, 2019, and 1/48th of the total shares subject to the option vest and become exercisable monthly thereafter such that the option is fully vested and exercisable on January 1, 2022. 25% of the total shares subject to the option vested and became exercisable on January 1, 2020, and 1/48th of the total shares subject to the option vest and become exercisable monthly thereafter such that the option is fully vested and exercisable on January 1, 2023. 25% of the total shares subject to the option vested and became exercisable on March 5, 2021, and 1/48th of the total shares subject to the option vest and become exercisable monthly thereafter such that the option is fully vested and exercisable on March 5, 2024. Executive Vice President, Chief Legal Officer, and Secretary /s/ Miles Treakle, Attorney-in-Fact 2021-07-07