Form 4: Atlassian Co-Founder Sells Shares Under 10b5-1 Plan

Atlassian Co-Founder and CEO Michael Cannon-Brookes sold 7,665 Class A Common Stock shares on August 7, 2025, as part of a pre-arranged Rule 10b5-1 trading plan.

Summary

• Michael Cannon-Brookes, Atlassian's Co-Founder, CEO, Director, and 10% Owner, reported the sale of 7,665 shares of Class A Common Stock.
• The transactions occurred on August 7, 2025, at weighted-average prices ranging from $170.443 to $188.241 per share.
• These sales were executed pursuant to a Rule 10b5-1 trading plan, which was adopted by Mr. Cannon-Brookes on February 20, 2025.
• Following these transactions, Mr. Cannon-Brookes beneficially owns 283,605 shares of Class A Common Stock indirectly through CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust.

Sentiment

Score: 5

Explanation: The filing reports routine insider stock sales executed under a pre-arranged 10b5-1 trading plan, which is a common practice for executives and generally viewed as neutral market activity.

Positives

• The sales were conducted under a pre-arranged Rule 10b5-1 trading plan, indicating a scheduled transaction for personal financial planning rather than a reaction to new negative company information.

Negatives

• Insider selling, even under a 10b5-1 plan, can sometimes be perceived negatively by the market, although its impact is often muted due to the pre-planned nature.

Future Outlook

N/A

Industry Context

This filing is a standard insider transaction disclosure and does not provide information related to broader industry trends or competitive landscape.

Related Party Transactions

• Shares are held indirectly by CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust, indicating a transaction involving a trust associated with the reporting person.

Stakeholder Impact

• Minimal direct impact on shareholders as these are routine insider sales under a pre-arranged plan. Employees, customers, suppliers, and creditors are not directly impacted by this specific filing.

Key Dates

Recommendation

The filing details routine insider sales by a co-founder under a pre-arranged 10b5-1 plan. Such transactions are typically not indicative of a change in company fundamentals or future prospects and are often for personal financial planning. Therefore, it does not warrant a change in investment stance based solely on this disclosure.

Keywords

Atlassian, TEAM, Michael Cannon-Brookes, insider trading, Form 4, stock sale, 10b5-1 plan, corporate governance, software, tech