X0306 4 2021-01-06 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 2021-01-06 4 M 0 1186 13.84 A 35951 D Common Stock 2021-01-06 4 M 0 931 16.60 A 36882 D Common Stock 2021-01-06 4 M 0 463 39.76 A 37345 D Common Stock 2021-01-06 4 S 0 1100 153.04 D 36245 D Common Stock 2021-01-06 4 S 0 980 154.79 D 35265 D Common Stock 2021-01-06 4 S 0 500 155.50 D 34765 D Common Stock 2021-01-06 4 S 0 1214 157.01 D 33551 D Stock Option (right to buy) 13.84 2021-01-06 4 M 0 1186 0.00 D 2027-02-09 Common Stock 1186 4742 D Stock Option (right to buy) 16.60 2021-01-06 4 M 0 931 0.00 D 2028-01-23 Common Stock 931 14907 D Stock Option (right to buy) 39.76 2021-01-06 4 M 0 463 0.00 D 2029-01-28 Common Stock 463 12964 D The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 11, 2020. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $152.42 to $153.385, inclusive. Upon request by the Issuer, any security holder thereof, or the staff of the Securities and Exchange Commission, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2), (3) and (5) to this Form 4. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $154.50 to $155.31, inclusive. This prearranged sale was effected pursuant to a written authorization executed by the Reporting Person on September 10, 2019, and represents shares required to be sold to cover tax withholding obligations in connection with the vesting of restricted stock units. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $156.97 to $157.9344, inclusive. 25% of the total shares subject to the option vested and became exercisable on January 1, 2018, 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, 2021. 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. Executive Vice President, Chief Legal Officer, and Secretary /s/ Miles Treakle, Attorney-in-Fact 2021-01-07