Form 4: Atlassian Co-Founder Sells $1.36M in Shares

Atlassian CEO and Co-Founder Michael Cannon-Brookes sold 7,665 shares of Class A Common Stock for approximately $1.36 million through a pre-arranged 10b5-1 trading plan.

Summary

• Michael Cannon-Brookes, Atlassian's CEO, Co-Founder, Director, and 10% owner, reported sales of Class A Common Stock.
• On August 29, 2025, a total of 7,665 shares were sold across four separate transactions.
• The sales were executed at weighted-average prices ranging from $177.0306 to $179.8333 per share.
• The total value of the shares sold is approximately $1,363,370.
• These transactions were conducted pursuant to a Rule 10b5-1 trading plan adopted on February 20, 2025.
• Following these sales, Michael Cannon-Brookes beneficially owns 160,965 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 sale by a key executive and significant owner could be perceived negatively, but the transaction was executed under a pre-arranged 10b5-1 plan, which mitigates the immediate negative signal often associated with insider selling. The amount sold is also a small percentage of the total beneficial ownership.

Positives

• The transactions were executed under a pre-arranged Rule 10b5-1 trading plan, indicating a structured and pre-scheduled approach to share sales rather than opportunistic selling.

Negatives

• Insider selling by a key executive and significant owner, even if pre-planned, can sometimes be interpreted by investors as a signal of reduced confidence or a desire for diversification, which may be viewed negatively.

Related Party Transactions

• The beneficial ownership of the shares, both before and after the reported transactions, is held indirectly by CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust, indicating a related party arrangement for the executive's holdings.

Stakeholder Impact

• Shareholders: May interpret the sale by a key executive as a slight negative signal, though the 10b5-1 plan context reduces this impact.

Key Dates

Recommendation

While the sale by a co-founder and CEO might raise questions, it was executed under a pre-arranged 10b5-1 plan, which suggests a planned diversification or liquidity event rather than a reaction to new negative company-specific information. The amount sold is also a relatively small portion of the executive's overall holdings. Therefore, it does not warrant a change in investment thesis based solely on this filing, suggesting a 'hold' position for existing investors.

Keywords

Atlassian, TEAM, Michael Cannon-Brookes, Insider Sale, Form 4, 10b5-1 Plan, Stock Sale, CEO, Co-Founder, Beneficial Ownership