X0306 4 2021-03-01 0 0000915912 AVALONBAY COMMUNITIES INC AVB 0001532949 Birenbaum Matthew H. C/O AVALONBAY COMMUNITIES, INC. 4040 WILSON BOULEVARD, STE. 1000 ARLINGTON VA 22203 0 1 0 0 Chief Investment Officer Common Stock, par value $.01 per share 2021-03-01 4 A 0 4530 0.00 A 62383 D Common Stock, par value $.01 per share 2021-03-01 4 F 0 6053 0.00 D 56330 D Reflects shares earned in connection with previously awarded performance share units issued under the Company's Second Amended and Restated 2009 Equity Incentive Plan. The amount of securities owned following the reported transaction reflects direct ownership of all shares of common stock, including restricted shares. Reflects withholding of shares by the Company to cover tax withholding obligations on the vesting of restricted stock and performance share unit awards under the Company's Second Amended and Restated 2009 Equity Incentive Plan. By Catherine T. White under Power of Attorney dated as of October 14, 2011 2021-03-03