Notice of Proposed Sale · 144

Atlassian Corporation

TEAMNASDAQEQUITYCurrent

Notice of Proposed Sale

Filed Aug 14, 2026Accepted Aug 14, 2026, 6:28 PM EDTFiling CIK 2051813Accession 0001950047-26-008186

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Structured filing — 144

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer: ATLASSIAN CORPORATION
Issuer CIK: 0001650372
SEC file number: 001-37651
Phone: (415) 701-1110
Person for whose account securities are to be sold: BRIAN DUFFY
Relationships to issuer: Officer
Street: 350 Bush Street, Floor 13
City: San Francisco
State / country code: CA
Postal code: 94104

Securities proposed for sale

Securities proposed for sale · 1 reported row
Security	Proposed units	Aggregate market value	Units outstanding	Approximate sale date	Exchange	Broker / market maker
Common	7,617	1,241,555.00	159,005,198	08/14/2026	NASDAQ	Morgan Stanley Smith Barney LLC Executive Financial Services

Broker / market maker — proposed row 1, entry 1

Name: Morgan Stanley Smith Barney LLC Executive Financial Services
Street: 1 New York Plaza
Street (continued): 8th Floor
City: New York
State / country code: NY
Postal code: 10004

Acquisition of securities to be sold

Acquisition of securities to be sold · 1 reported row
Security	Acquired	Nature of acquisition	Acquired from	Amount acquired	Gift transaction	Payment date	Nature of payment
Common	08/13/2026	Restricted Stock	Issuer	7,617	N	08/13/2026	Not Applicable

Sales reported in the preceding three months

Sales reported in the preceding three months · 6 reported rows
Seller	Security	Sale date	Amount sold	Gross proceeds
Duffy Brian	COMMON	06/12/2026	3,000	269,130.00
Duffy Brian	COMMON	06/11/2026	1,432	127,147.28
Duffy Brian	COMMON	06/10/2026	1,813	168,228.27
Duffy Brian	COMMON	06/09/2026	1,454	138,638.90
Duffy Brian	COMMON	06/08/2026	1,451	142,241.53
BRIAN DUFFY	Common	05/19/2026	1,986	174,266.73

Seller — prior-sale row 1, entry 1

Name: Duffy Brian
Street: 350 Bush Street, Floor 13
City: San Francisco
State / country code: CA
Postal code: 94104

Seller — prior-sale row 2, entry 1

Name: Duffy Brian
Street: 350 Bush Street, Floor 13
City: San Francisco
State / country code: CA
Postal code: 94104

Seller — prior-sale row 3, entry 1

Name: Duffy Brian
Street: 350 Bush Street, Floor 13
City: San Francisco
State / country code: CA
Postal code: 94104

Seller — prior-sale row 4, entry 1

Name: Duffy Brian
Street: 350 Bush Street, Floor 13
City: San Francisco
State / country code: CA
Postal code: 94104

Seller — prior-sale row 5, entry 1

Name: Duffy Brian
Street: 350 Bush Street, Floor 13
City: San Francisco
State / country code: CA
Postal code: 94104

Seller — prior-sale row 6, entry 1

Name: BRIAN DUFFY
Street: 350 Bush Street, Floor 13
City: San Francisco
State / country code: CA
Postal code: 94104

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