Form 4: Atlassian Co-Founder Sells $1.27M in Shares Under 10b5-1 Plan

Atlassian Co-Founder and CEO Michael Cannon-Brookes reported the sale of 7,665 shares of Class A Common Stock on September 23, 2025, under a pre-arranged 10b5-1 trading plan.

Summary

• Michael Cannon-Brookes, a Director, 10% Owner, CEO, and Co-Founder of Atlassian Corp (TEAM), reported the sale of 7,665 shares of Class A Common Stock.
• The transactions occurred on September 23, 2025, and were executed pursuant to a Rule 10b5-1 trading plan adopted on February 20, 2025.
• The shares were sold in multiple trades at weighted-average prices ranging from $163.7882 to $170.2314 per share.
• The total value of the shares sold is approximately $1,274,601.65.
• Following these transactions, Michael Cannon-Brookes indirectly beneficially owns 38,325 shares of Class A Common Stock, held by CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust.

Sentiment

Score: 5

Explanation: The sentiment is neutral as the reported sales are routine transactions executed under a pre-arranged 10b5-1 trading plan, which typically indicates personal financial management rather than a change in company fundamentals or management's outlook.

Negatives

• The filing reports insider selling by a key executive and co-founder, which could be perceived negatively by some investors, although it was pre-planned.

Future Outlook

This Form 4 filing does not contain any forward-looking statements or guidance regarding the company's future performance or outlook.

Industry Context

This filing is a routine insider transaction report and does not provide specific insights into broader industry trends or competitive landscape. Insider sales under a 10b5-1 plan are common for executives managing personal finances and diversification.

Stakeholder Impact

• Shareholders: The sale represents a minor reduction in insider ownership, but its execution under a 10b5-1 plan mitigates concerns about its implications for company performance. The total value sold is relatively small compared to Atlassian's market capitalization.

Key Dates

Recommendation

The filing reports a pre-scheduled sale of shares by a co-founder and CEO under a Rule 10b5-1 trading plan. Such sales are generally considered routine for diversification or liquidity purposes and do not typically signal a change in company fundamentals or management's long-term outlook. Therefore, it does not warrant a change in investment recommendation based solely on this filing.

Keywords

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