Form 4: Atlassian Co-Founder Sells $1.25M in Shares

Atlassian Co-Founder and CEO Michael Cannon-Brookes sold 7,665 Class A Common Stock shares for approximately $1.25 million under a pre-arranged trading plan.

Summary

• Michael Cannon-Brookes, a Director, 10% Owner, and Co-Founder/CEO of Atlassian Corp, reported transactions involving the sale of Class A Common Stock.
• On December 31, 2025, 2,736 shares of Class A Common Stock were disposed of at a weighted-average price of $162.3326 per share.
• On the same date, an additional 4,929 shares of Class A Common Stock were disposed of at a weighted-average price of $162.8699 per share.
• All reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by Michael Cannon-Brookes on February 20, 2025.
• The shares were held indirectly by CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust.
• Following these transactions, the indirect beneficial ownership of Class A Common Stock by Michael Cannon-Brookes through the trust is 0.00 shares.

Sentiment

Score: 5

Explanation: Neutral. This is a routine insider transaction executed under a pre-arranged 10b5-1 trading plan, which is typically for personal financial management or diversification and does not inherently signal a change in the company's fundamental prospects or the insider's confidence.

Future Outlook

This Form 4 filing does not contain any forward-looking statements or guidance regarding the company's future outlook.

Management Comments

• The Reporting Person 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.

Industry Context

This insider transaction report is specific to Atlassian Corp and Michael Cannon-Brookes, and does not provide broader industry trends or competitive analysis.

Related Party Transactions

• The shares disposed of were held indirectly by CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust, indicating the beneficial ownership structure.

Stakeholder Impact

• Shareholders: Minimal impact as the sale was pre-scheduled under a 10b5-1 plan, reducing the perception of opportunistic selling.

Key Dates

Keywords

Atlassian, TEAM, Michael Cannon-Brookes, Insider Trading, Stock Sale, 10b5-1 Plan, CEO, Co-Founder