Form 4: Atlassian Co-Founder Sells TEAM Shares

Atlassian Co-Founder and CEO Michael Cannon-Brookes reported the sale of 7,665 Class A Common Stock shares under a pre-arranged 10b5-1 trading plan.

Summary

• Michael Cannon-Brookes, Atlassian's Co-Founder, CEO, Director, and 10% owner, reported sales of Class A Common Stock.
• A total of 7,665 shares were sold on December 1, 2025, through multiple transactions.
• The sales were executed at weighted-average prices ranging from $148.5675 to $154.0432 per share.
• These transactions were conducted under a Rule 10b5-1 trading plan adopted on February 20, 2025.
• Following these transactions, Michael Cannon-Brookes indirectly beneficially owns 160,965 Class A Common Stock shares through CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust.

Sentiment

Score: 5

Explanation: Neutral. This is a routine disclosure of an insider stock sale executed under a pre-arranged 10b5-1 trading plan, which is a common practice for executives and does not typically indicate a change in company fundamentals or management's outlook.

Future Outlook

N/A

Industry Context

This is a routine insider transaction disclosure for a publicly traded software company. Such sales under a 10b5-1 plan are common for executives to manage personal finances while adhering to insider trading regulations, and do not inherently reflect on the company's operational performance or industry trends.

Stakeholder Impact

• Shareholders may note the sale by a key executive, though the pre-arranged 10b5-1 plan mitigates concerns about opportunistic selling.

Key Dates

Keywords

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