Form 4: Atlassian Co-Founder Sells $1.1M in Shares

Atlassian Co-Founder and CEO Michael Cannon-Brookes reported the sale of 7,765 Class A Common Stock shares totaling over $1.1 million under a pre-arranged 10b5-1 trading plan.

Summary

• Michael Cannon-Brookes, Atlassian's Co-Founder, CEO, Director, and 10% Owner, sold 7,765 shares of Class A Common Stock on November 17, 2025.
• The sales were executed at weighted-average prices ranging from $145.7745 to $151.64 per share.
• The total value of the shares sold amounts to approximately $1,129,856.
• These transactions were conducted pursuant to a Rule 10b5-1 trading plan adopted on February 20, 2025.
• Following these transactions, Michael Cannon-Brookes beneficially owns 229,950 shares of Class A Common Stock indirectly through CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust.

Sentiment

Score: 5

Explanation: Neutral. While it's an insider sale, it's part of a pre-arranged 10b5-1 plan, which typically signals a planned liquidity event rather than a negative outlook on the company's future. The amount is also not exceptionally large relative to the company's market cap or the insider's total holdings.

Positives

• The transactions were executed under a pre-arranged Rule 10b5-1 trading plan, indicating a scheduled sale rather than a reaction to recent events.

Negatives

• Insider selling, even under a 10b5-1 plan, reduces the direct ownership stake of a key executive.

Future Outlook

NA

Industry Context

NA

Related Party Transactions

• Shares are held indirectly by CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust, which is a common arrangement for executive holdings.

Stakeholder Impact

• Shareholders: Minor impact. Routine insider sales under a 10b5-1 plan are generally not seen as a strong signal of future performance, but a reduction in insider ownership could be noted.
• Employees, Customers, Suppliers, Creditors: No direct impact from this filing.

Key Dates

Recommendation

This Form 4 filing reports a routine insider sale under a pre-arranged 10b5-1 plan. Such transactions are typically for personal financial planning and do not inherently signal a change in the company's fundamental outlook or performance. Therefore, it does not provide sufficient new information to alter an existing investment recommendation for Atlassian.

Keywords

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