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

Atlassian CEO and Co-Founder Michael Cannon-Brookes sold 7,665 Class A Common Stock shares on January 23, 2026, under a pre-arranged 10b5-1 trading plan.

Summary

• Michael Cannon-Brookes, Atlassian's CEO, Co-Founder, Director, and 10% owner, reported the sale of Class A Common Stock.
• The transactions occurred on January 23, 2026.
• A total of 7,665 shares were sold across four separate transactions.
• The sales were executed at weighted-average prices ranging from $129.4736 to $132.105 per share.
• These sales were conducted pursuant to a Rule 10b5-1 trading plan adopted on February 20, 2025.
• Following these transactions, Michael Cannon-Brookes indirectly beneficially owns 352,590 shares through CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust.

Sentiment

Score: 5

Explanation: The sentiment is neutral. While it's an insider sale, it was pre-planned under a 10b5-1 plan, which mitigates the negative signal often associated with insider selling. It's a routine personal financial management action rather than a statement on company performance.

Positives

• The sale was conducted under a pre-arranged Rule 10b5-1 trading plan, indicating a planned and not reactive disposition of shares.

Negatives

• An insider sale by a key executive and 10% owner, even if pre-planned, can sometimes be perceived negatively by the market.

Risks

• Potential negative market perception due to insider selling, which could put downward pressure on the stock price.

Future Outlook

NA

Industry Context

This filing is a routine insider transaction report and does not provide specific details that directly relate to broader industry trends or competitive landscape. Insider sales, even under 10b5-1 plans, are common for executives managing personal finances and diversification.

Comparison to Industry Standards

• NA

Legal Proceedings

• NA

Related Party Transactions

• NA

Stakeholder Impact

• Shareholders: May interpret the sale as a slight negative signal, though mitigated by the 10b5-1 plan. The overall impact on share price is likely minimal given the relatively small number of shares sold compared to total outstanding shares and the executive's remaining holdings.

Next Steps

• NA

Key Dates

Recommendation

The filing details a routine, pre-planned insider sale by a key executive under a 10b5-1 plan. This type of transaction is generally for personal financial management and diversification, rather than an indication of a change in the executive's outlook on the company's future. While insider sales can sometimes be a negative signal, the pre-arranged nature mitigates this concern. The number of shares sold is also a small fraction of the executive's total holdings. Therefore, this specific filing does not provide a strong basis for a 'buy' or 'sell' recommendation, suggesting a 'hold' position is appropriate based solely on this information.

Keywords

Atlassian, TEAM, Insider Sale, Form 4, Michael Cannon-Brookes, 10b5-1 Plan, Stock Transaction, CEO, Co-Founder, Share Disposition