To our shareholders, customers,

1 To our shareholders, customers, partners, and all Atlassians We entered fiscal 2021 staring down uncertainty and bracing against headwinds. We exited fiscal 2021 in a stronger position than ever. Over the past year, we took swift, bold action to continue our evolution into a cloud-first company and further our mission of unleashing the potential of every team. As is the Atlassian way, we set out an ambitious plan, and we executed on it. We played offense throughout this difficult year. We finished fiscal 2021 proud of our resilience and what we accomplished together as a team. Those accomplishments include surpassing $2 billion in revenue, adding 60,000 net new customers bringing our total customer base to more than 200,000, welcoming over 1,500 new Atlassians to the team, and building five new products on top of our rapidly-advancing cloud platform.

2 We also made tremendous progress moving customers to the cloud this year, increasing the number of cloud migrations by 2x year-over-year. We re reimagining the future of work and continue to innovate in our three core markets: agile development, IT service management, and work management for all. We operate with a long-term mindset and our execution bolsters our confidence for the journey ahead of we enter fiscal 2022, the broader economic and talent environments present some fascinating challenges and opportunities. As the world digitizes, companies are realizing that technology is the true competitive advantage. Every company will either become a digital company or perish.

3 At the same time, cheap capital is fueling this once-in-a-lifetime technology investment boom. For Atlassian, these twin forces of digital transformation and the technology boom mean the opportunities in front of us have never been greater. Hence, even more than last year, we are going to continue to play offense in fiscal 2022. We plan to keep building on our cloud migration momentum, invest to further strengthen our offerings so we can keep winning in our three addressable markets, forge human connections with each other as we figure out new ways of working in this digital-first world, and to continue executing towards our long-term goals. We want to thank Atlassians for their resilience and determination.

4 It s been a year of professional and personal challenges like we ve never seen before. But we got through it by sticking together and are coming out stronger for you for your support on our journey to unleash the potential of every Farquhar and Mike Cannon-Brookes Co-Founders and Co-Chief Executive OfficersUNITED STATESSECURITIES AND EXCHANGE COMMISSIONWASHINGTON, 20549 FORM 20-F (Mark One) REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended June 30, 2021 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)

5 OF THE SECURITIES EXCHANGE ACT OF 1934 OR SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-37651 Atlassian Corporation Plc(Exact name of Registrant as specified in its charter) Not Applicable(Translation of Registrant s name into English)England and Wales(Jurisdiction of incorporation or organization) Exchange HousePrimrose StreetLondon EC2A 2 EGc/o Herbert Smith Freehills LLP(Address of principal executive offices)Stuart FaginDeputy General CounselAtlassian Corporation PlcExchange HousePrimrose StreetLondon EC2A 2 EGc/o Herbert Smith Freehills Telephone, E-mail and/or Facsimile number and Address of Company Contact Person)Securities registered or to be registered pursuant to Section 12(b) of the Act:Title of each class Trading SymbolName of each exchange on which registeredClass A Ordinary SharesTEAMN asdaq Global Select MarketSecurities registered or to be registered pursuant to Section 12(g) of the Act: NoneSecurities for which there is a reporting obligation pursuant to Section 15(d) of the Act.

6 Class B Ordinary SharesIndicate the number of outstanding shares of each of the issuer s classes of capital or common stock as of the close of the period covered by the annual report:As of June 30, 2021, 137,307,769 Class A Ordinary Shares and 114,609,645 Class B Ordinary Shares. Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes No If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934. Yes No Note Checking the box above will not relieve any registrant required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 from their obligations under those by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

7 Yes No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T ( of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files. Yes No Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer, or an emerging growth company. See definitions of large accelerated filer, accelerated filer, and emerging growth company in Rule 12b-2 of the Exchange Act: Large accelerated filer Accelerated filer Non-accelerated filer Emerging growth company If an emerging growth company that prepares its financial statements in accordance with GAAP, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.)

8 The term new or revised financial accounting standard refers to any update issued by the Financial Accounting Standards Board to its Accounting Standards Codification after April 5, 2012. Indicate by check mark whether the registrant has filed a report on and attestation to its management s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 7262(b)) by the registered public accounting firm that prepared or issued its audit report. Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing: GAAP International Financial Reporting Standards as issued by the International Accounting Standards Board Other If Other has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow.

9 Item 17 Item 18 If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes No ANNUAL REPORTTABLE OF CONTENTSINTRODUCTION4 SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS4 PART I5 Item 1. IDENTITY OF DIRECTORS, SENIOR MANAGEMENT AND ADVISERS5 Item 2. OFFER STATISTICS AND EXPECTED TIMETABLE5 Item 3. KEY INFORMATION5 Item 4. INFORMATION ON THE COMPANY40 Item 4A. UNRESOLVED STAFF COMMENTS50 Item 5. OPERATING AND FINANCIAL REVIEW AND PROSPECTS50 Item 6. DIRECTORS, SENIOR MANAGEMENT AND EMPLOYEES68 Item 7. MAJOR SHAREHOLDERS AND RELATED PARTY TRANSACTIONS 79 Item 8. FINANCIAL INFORMATION83 Item 9.

10 THE OFFER AND LISTING 83 Item 10. ADDITIONAL INFORMATION 84 Item 11. QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK92 Item 12. DESCRIPTION OF SECURITIES OTHER THAN EQUITY SECURITIES 94 PART II94 Item 13. DEFAULTS, DIVIDEND ARREARAGES AND DELINQUENCIES 94 Item 14. MATERIAL MODIFICATIONS TO THE RIGHTS OF SECURITY HOLDERS AND USE OF PROCEEDS94 Item 15. CONTROLS AND PROCEDURES94 Item 16. RESERVED95 Item 16A. AUDIT COMMITTEE FINANCIAL EXPERT95 Item 16B. CODE OF 16C. PRINCIPAL ACCOUNTANT FEES AND SERVICES95 Item 16D. EXEMPTIONS FROM THE LISTING STANDARDS FOR AUDIT COMMITTEES 96 Item 16E. PURCHASES OF EQUITY SECURITIES BY THE ISSUER AND AFFILIATED PURCHASERS96 Item 16F.