Form 4: Atlassian Co-Founder Michael Cannon-Brookes Reports Planned Stock Sale

Atlassian Co-Founder and CEO Michael Cannon-Brookes reported the sale of 7,665 shares of Class A Common Stock for approximately $1.55 million, executed under a pre-arranged Rule 10b5-1 trading plan.

Summary

• Michael Cannon-Brookes, Atlassian's Co-Founder, CEO, Director, and 10% Owner, reported the sale of 7,665 shares of Class A Common Stock.
• The transactions occurred on July 28, 2025, and were executed under a Rule 10b5-1 trading plan adopted on February 20, 2025.
• The shares were sold in multiple trades at weighted-average prices ranging from $201.25 to $205.58 per share.
• The total value of the shares sold is approximately $1,548,785.67.
• Following these transactions, Cannon-Brookes beneficially owns 344,925 shares of Class A Common Stock, held indirectly through CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust.

Sentiment

Score: 5

Explanation: Neutral. While an insider sale can sometimes be viewed negatively, the fact that it was executed under a pre-arranged 10b5-1 plan mitigates concerns that it's based on new, negative information. It's a routine liquidity event.

Positives

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

Negatives

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

Future Outlook

NA

Industry Context

This filing reflects a routine insider transaction for liquidity or diversification purposes, common among executives of mature technology companies like Atlassian. It does not inherently signal broader industry trends.

Related Party Transactions

• Shares are held by CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust, indicating an indirect beneficial ownership structure related to the reporting person.

Stakeholder Impact

• Shareholders may observe a slight reduction in direct insider ownership, though the pre-planned nature of the sale lessens concerns about management's confidence in the company's future.

Key Dates

Recommendation

The reported insider sale by Michael Cannon-Brookes is a routine transaction executed under a pre-arranged 10b5-1 plan. This type of sale is typically for personal financial planning or diversification and does not usually signal a change in the company's fundamental outlook or performance. Therefore, it does not warrant a change in investment thesis based solely on this filing. Investors should continue to hold based on Atlassian's underlying business fundamentals.

Keywords

Atlassian, TEAM, SEC Form 4, Insider Trading, Stock Sale, Michael Cannon-Brookes, 10b5-1 Plan, Beneficial Ownership, Corporate Governance