144 0001666120 XXXXXXXX LIVE 0001650372 ATLASSIAN CORP PLC CL A 001-37651 350 Bush Street, 13th Floor San Francisco CA 94104 4157011110 Cannon-Brookes Head Trust Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

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

519182 95529488.00 151883134 06/07/2023 NASDAQ Common 07/02/2010 Founders Shares Issuer N 519182 07/02/2010 N/A N 10b5-1 Sales Plan for CANNON-BROOKES HEAD TRUST

350 Bush Street, 13th Floor San Francisco CA 94104

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350 Bush Street, 13th Floor San Francisco CA 94104

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350 Bush Street, 13th Floor San Francisco CA 94104

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350 Bush Street, 13th Floor San Francisco CA 94104

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350 Bush Street, 13th Floor San Francisco CA 94104

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350 Bush Street, 13th Floor San Francisco CA 94104

Common 03/08/2023 8614 1525011.36 06/07/2023 02/21/2023 /s/ Michael Cannon-Brookes, Trustee of Cannon-Brookes Head Trust