144 0001946003 XXXXXXXX LIVE 0001650372 ATLASSIAN CORP PLC CL A 001-37651 350 Bush Street, 13th Floor San Francisco CA 94104 4157011110 CAMERON DEATSCH Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 38th Fl. New York NY 10004

6306 1167051.42 155011446 11/22/2023 NASDAQ Common 11/18/2023 Restricted Stock Units Issuer N 3890 11/18/2023 N/A Common 05/18/2023 Restricted Stock Units Issuer N 2416 05/18/2023 N/A N CAMERON DEATSCH

350 Bush Street, 13th Floor San Francisco CA 94104

Common 11/20/2023 3991 742884.74 10b5-1 Sales for CAMERON DEATSCH

350 Bush Street, 13th Floor San Francisco CA 94104

Common 11/16/2023 2416 450076.64 10b5-1 Sales for CAMERON DEATSCH

350 Bush Street, 13th Floor San Francisco CA 94104

Common 11/15/2023 3410 644449.42 CAMERON DEATSCH

350 Bush Street, 13th Floor San Francisco CA 94104

Common 11/14/2023 2508 463904.76 10b5-1 Sales for CAMERON DEATSCH

350 Bush Street, 13th Floor San Francisco CA 94104

Common 11/08/2023 3411 594320.36 10b5-1 Sales for CAMERON DEATSCH

350 Bush Street, 13th Floor San Francisco CA 94104

Common 11/01/2023 3411 607724.57 10b5-1 Sales for CAMERON DEATSCH

350 Bush Street, 13th Floor San Francisco CA 94104

Common 09/27/2023 3411 671704.69 10b5-1 Sales for CAMERON DEATSCH

350 Bush Street, 13th Floor San Francisco CA 94104

Common 09/20/2023 3411 696333.14 10b5-1 Sales for CAMERON DEATSCH

350 Bush Street, 13th Floor San Francisco CA 94104

Common 09/13/2023 3411 715383.57 10b5-1 Sales for CAMERON DEATSCH

350 Bush Street, 13th Floor San Francisco CA 94104

Common 09/06/2023 3411 702080.67 10b5-1 Sales for CAMERON DEATSCH

350 Bush Street, 13th Floor San Francisco CA 94104

Common 08/29/2023 5484 1081899.38 11/22/2023 05/30/2023 /s/ Cameron Deatsch