X0306 4 2022-03-07 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 2022-03-07 4 S 0 548 93.35 D 49171 D This prearranged sale was effected pursuant to a written authorization executed by the Reporting Person on February 20, 2022, 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 $93.34 to $94.06, 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 range. Executive Vice President, Chief Legal Officer, and Secretary /s/ Miles Treakle, Attorney-in-Fact 2022-03-09