Form 4: Atlassian Co-Founder Sells $1.3M in Shares

Atlassian Corp co-founder Michael Cannon-Brookes sold 7,665 Class A Common Stock shares for approximately $1.3 million under a pre-arranged 10b5-1 trading plan.

Summary

• Michael Cannon-Brookes, Atlassian's Co-Founder, CEO, Director, and 10% Owner, disposed of 7,665 shares of Class A Common Stock.
• The transactions occurred on September 22, 2025, at weighted-average prices ranging from $166.9953 to $171.855 per share.
• The total value of the shares sold is approximately $1,304,598.
• These sales were executed pursuant to a Rule 10b5-1 trading plan adopted on February 20, 2025.
• Following these transactions, Michael Cannon-Brookes beneficially owns 45,990 shares indirectly through CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust.

Sentiment

Score: 4

Explanation: While insider selling can be perceived negatively, the execution under a pre-arranged 10b5-1 plan mitigates concerns about immediate negative sentiment. It's a routine personal financial management action rather than a signal of company distress.

Negatives

• Insider selling, even under a 10b5-1 plan, can sometimes be perceived negatively by the market as it reduces management's direct equity exposure.

Future Outlook

na

Industry Context

This Form 4 filing is a routine disclosure of insider stock transactions and does not provide broader industry context or trends. It reflects an individual executive's portfolio management rather than a strategic company move.

Related Party Transactions

• Shares are held by CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust, indicating an indirect beneficial ownership structure for the reporting person.

Stakeholder Impact

• Shareholders may view the insider sale with slight caution, though the 10b5-1 plan reduces the implication of a lack of confidence. No direct impact on employees, customers, suppliers, or creditors is indicated by this filing.

Key Dates

Recommendation

The insider sale by Michael Cannon-Brookes, while a reduction in his direct equity exposure, was conducted under a pre-arranged Rule 10b5-1 trading plan. This suggests a planned personal financial management strategy rather than a reaction to new, undisclosed negative information about Atlassian. Therefore, it does not provide a strong signal for a 'buy' or 'sell' recommendation, and a 'hold' stance is appropriate based solely on this filing.

Keywords

Atlassian, TEAM, Michael Cannon-Brookes, Insider Trading, Form 4, Stock Sale, 10b5-1 Plan, Equity Disposal, Director, CEO, 10% Owner