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

Atlassian CEO and Co-Founder Michael Cannon-Brookes sold 7,665 shares of Class A Common Stock on November 10, 2025, as part of a pre-arranged Rule 10b5-1 trading plan.

Summary

• Michael Cannon-Brookes, CEO, Co-Founder, Director, and 10% Owner of Atlassian Corp, reported the sale of Class A Common Stock.
• A total of 7,665 shares were sold on November 10, 2025, through multiple transactions.
• The sales were executed at weighted-average prices ranging from $155.3307 to $160.27 per share.
• These transactions were conducted under a Rule 10b5-1 trading plan adopted on February 20, 2025.
• Following these sales, Cannon-Brookes indirectly beneficially owns 268,275 shares of Class A Common Stock through the Cannon-Brookes Head Trust.

Sentiment

Score: 6

Explanation: The sale of shares by a key insider is generally a slight negative, but the existence of a pre-arranged 10b5-1 plan mitigates concerns, making it a neutral to slightly negative event rather than a strong negative signal.

Positives

• The sale was conducted under a pre-arranged Rule 10b5-1 trading plan, indicating a planned liquidity event rather than a reaction to new negative company information.

Negatives

• An insider sale, even if pre-planned, reduces the direct ownership stake of a key executive and 10% owner.

Future Outlook

No specific future outlook or guidance is provided in this Form 4 filing.

Industry Context

This is a routine insider transaction for a large technology company. Such sales, especially when conducted under a Rule 10b5-1 plan, are common for personal financial planning and diversification among executives and do not inherently reflect broader industry trends.

Comparison to Industry Standards

• Insider sales executed under Rule 10b5-1 plans are a standard practice among executives of publicly traded companies, particularly in the tech sector, for managing personal liquidity and diversification without being subject to insider trading accusations. This transaction aligns with typical corporate governance practices for executive share disposals.

Stakeholder Impact

• Shareholders: Minor reduction in insider ownership, but the pre-arranged nature of the sale under a 10b5-1 plan suggests no immediate negative implications for company performance or strategic direction.

Key Dates

Recommendation

The insider sale by Michael Cannon-Brookes, while reducing his direct stake, was conducted under a pre-arranged 10b5-1 trading plan. This suggests a planned liquidity event for personal financial management rather than a reflection of a negative outlook on Atlassian's future performance. Therefore, this specific filing does not provide a strong signal for a 'buy' or 'sell' recommendation, maintaining a 'hold' stance based solely on this information.

Keywords

Atlassian, TEAM, Michael Cannon-Brookes, Insider Sale, Form 4, 10b5-1 Plan, Beneficial Ownership, Equity Transaction, CEO, Co-Founder