X0508 4 2026-02-06 false 0001650372 Atlassian Corp TEAM 0001666120 Cannon-Brookes Michael C/O ATLASSIAN CORPORATION 350 BUSH STREET, FLOOR 13 SAN FRANCISCO CA 94104 true true true false CEO, Co-Founder true Class A Common Stock 2026-02-06 4 S false 100.00 101.745 D 283505.00 I See Footnote Class A Common Stock 2026-02-06 4 S false 300.00 96.955 D 283205.00 I See Footnote Class A Common Stock 2026-02-06 4 S false 1850.00 93.0989 D 281355.00 I See Footnote Class A Common Stock 2026-02-06 4 S false 50.00 98.13 D 281305.00 I See Footnote Class A Common Stock 2026-02-06 4 S false 2500.00 94.0953 D 278805.00 I See Footnote Class A Common Stock 2026-02-06 4 S false 200.00 99.635 D 278605.00 I See Footnote Class A Common Stock 2026-02-06 4 S false 2065.00 95.0806 D 276540.00 I See Footnote Class A Common Stock 2026-02-06 4 S false 350.00 96.0186 D 276190.00 I See Footnote Class A Common Stock 2026-02-06 4 S false 250.00 100.808 D 275940.00 I See Footnote This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 20, 2025. This transaction was executed in multiple trades during the day at prices ranging from $100.42 to $101.08. The weighted-average price is reported above. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. This transaction was executed in multiple trades during the day at prices ranging from $101.74 to $101.75. The weighted-average price is reported above. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. Shares are held by CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust. This transaction was executed in multiple trades during the day at prices ranging from $96.63 to $97.59. The weighted-average price is reported above. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. This transaction was executed in multiple trades during the day at prices ranging from $92.58 to $93.55. The weighted-average price is reported above. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. This transaction was executed in multiple trades during the day at prices ranging from $93.58 to $94.52. The weighted-average price is reported above. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. This transaction was executed in multiple trades during the day at prices ranging from $99.26 to $99.82. The weighted-average price is reported above. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. This transaction was executed in multiple trades during the day at prices ranging from $94.62 to $95.58. The weighted-average price is reported above. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. This transaction was executed in multiple trades during the day at prices ranging from $95.62 to $96.51. The weighted-average price is reported above. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. /s/ Veena Bhatia, Attorney-in-Fact for Cannon-Brookes Michael 2026-02-06