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

Atlassian Co-Founder and CEO Michael Cannon-Brookes reported multiple sales of Class A Common Stock totaling 7,665 shares on November 21, 2025, 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.
• The transactions occurred on November 21, 2025.
• A total of 7,665 shares were sold across seven separate transactions.
• The sales were executed pursuant to a Rule 10b5-1 trading plan adopted on February 20, 2025.
• Weighted-average prices for the sales ranged from $140.662 to $146.3636 per share.
• Following these transactions, Michael Cannon-Brookes indirectly beneficially owns 199,290 shares of Class A Common Stock through CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust.

Sentiment

Score: 5

Explanation: This is a routine insider sale under a pre-arranged 10b5-1 plan, which is generally considered a neutral event.

Future Outlook

This filing does not contain any forward-looking statements or guidance.

Industry Context

This is a routine insider transaction and does not provide specific insights into broader industry trends or competitive landscape.

Stakeholder Impact

• Shareholders may note a reduction in direct beneficial ownership by a key executive, though this is a pre-planned sale under a 10b5-1 plan and typically does not indicate a change in company fundamentals.

Key Dates

Recommendation

The filing reports a routine sale of shares by a key executive under a pre-arranged 10b5-1 trading plan. Such planned sales are common for executives for diversification and liquidity purposes and do not typically signal a change in the company's fundamentals or future prospects. Therefore, the filing itself does not warrant a change in investment recommendation.

Keywords

Atlassian, TEAM, Michael Cannon-Brookes, insider trading, Form 4, stock sale, 10b5-1 plan, beneficial ownership