144 0002051813 XXXXXXXX LIVE 0001650372 ATLASSIAN CORPORATION 001-37651 350 Bush Street, Floor 13 San Francisco CA 94104 (415) 701-1110 BRIAN DUFFY Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

7617 1241555.00 159005198 08/14/2026 NASDAQ Common 08/13/2026 Restricted Stock Issuer N 7617 08/13/2026 Not Applicable N Duffy Brian

350 Bush Street, Floor 13 San Francisco CA 94104

COMMON 06/12/2026 3000 269130.00 Duffy Brian

350 Bush Street, Floor 13 San Francisco CA 94104

COMMON 06/11/2026 1432 127147.28 Duffy Brian

350 Bush Street, Floor 13 San Francisco CA 94104

COMMON 06/10/2026 1813 168228.27 Duffy Brian

350 Bush Street, Floor 13 San Francisco CA 94104

COMMON 06/09/2026 1454 138638.90 Duffy Brian

350 Bush Street, Floor 13 San Francisco CA 94104

COMMON 06/08/2026 1451 142241.53 BRIAN DUFFY

350 Bush Street, Floor 13 San Francisco CA 94104

Common 05/19/2026 1986 174266.73 08/14/2026 /s/ Brian Duffy