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

Atlassian Co-Founder and CEO Michael Cannon-Brookes sold 7,665 shares of Class A Common Stock on December 2, 2025, through a pre-arranged 10b5-1 trading plan.

Summary

• Michael Cannon-Brookes, Co-Founder, CEO, Director, and 10% Owner of Atlassian Corp (TEAM), reported sales of Class A Common Stock.
• A total of 7,665 shares were disposed of on December 2, 2025.
• The sales were executed at weighted-average prices ranging from $152.6547 to $156.57 per share.
• These transactions were conducted pursuant to a Rule 10b5-1 trading plan adopted by Mr. Cannon-Brookes on February 20, 2025.
• Following these transactions, the indirect beneficial ownership of Class A Common Stock decreased to 153,300 shares, held by CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust.

Sentiment

Score: 4

Explanation: The sale of shares by a key executive, even if pre-scheduled via a 10b5-1 plan, can be perceived with slight negative sentiment by the market as it reduces insider ownership. However, the pre-scheduled nature mitigates some of the immediate negative impact, indicating a planned financial management strategy rather than a reaction to new adverse company news.

Negatives

• Insider selling by a key executive (CEO, Co-Founder, Director, 10% Owner) could be perceived negatively by the market, even if pre-scheduled.

Risks

• Potential negative market perception due to significant insider selling by a key executive, which might be interpreted as a lack of confidence, despite being pre-scheduled.

Future Outlook

NA

Industry Context

NA

Stakeholder Impact

• Shareholders: Potential for slight negative sentiment due to insider selling, though mitigated by the pre-arranged 10b5-1 plan, which suggests a planned financial move rather than a reaction to new company-specific information.

Key Dates

Recommendation

The reported insider sales by Michael Cannon-Brookes, Atlassian's Co-Founder and CEO, were conducted under a pre-arranged Rule 10b5-1 trading plan. While insider selling can sometimes signal a lack of confidence, the pre-scheduled nature suggests it is part of a personal financial management strategy rather than a reaction to new company-specific negative news. Therefore, without additional information regarding company performance or broader market conditions, a 'hold' recommendation is appropriate, advising investors to maintain their current positions while monitoring future developments.

Keywords

Atlassian, TEAM, Michael Cannon-Brookes, Insider Trading, Form 4, Stock Sale, 10b5-1 Plan, Corporate Governance, Executive Compensation