Why is Atlassian stock tumbling today?

Shares of Atlassian fell 15.8% in pre-open trading after the enterprise software company’s fiscal first-quarter earnings call revealed a sharp deceleration in its forward growth outlook, overshadowing a quarterly report that beat analyst expectations across the board.

Adjusted earnings per share came in at $1.65, well above the $1.43 consensus estimate, while revenue rose 24% year-over-year to $1.77 billion, surpassing the $1.71 billion forecast.

The core problem for investors was the guidance. Management projected full-year fiscal 2027 revenue growth of approximately 13.75% — less than half the 24% rate delivered in Q1 — and forecast subscription ARR growth of approximately 18.5% for the year, a notable step-down from the 23% rate just reported.

CFO James Chuong also flagged that the company would face "tougher comps" in the second half of fiscal 2027, and the Q2 cloud growth outlook of approximately 27% represented a deceleration from the 31% pace achieved in Q1. Additionally, Data Center revenue is expected to contract approximately 16% for the full year as customers continue migrating to cloud deployments.

The broader market provided no cover for the stock’s decline. The Nasdaq is up 1.5% today, the S&P 500 is marginally positive, and the Dow Jones is slightly lower, meaning Atlassian’s move is entirely driven by company-specific factors rather than any macro or sector-wide pressure.

CEO Mike Cannon-Brookes struck an optimistic tone on the earnings call, pointing to AI adoption reaching an inflection point and highlighting strong enterprise demand, but analysts pressed hard on the growth deceleration and AI monetization timeline.

Ultimately, a stock that had rallied sharply into earnings — trading near $185 at the open — proved vulnerable to any sign that its premium valuation required a higher and more sustained growth trajectory than management was willing to commit to, and the guidance gap between Q1’s momentum and the full-year target was enough to send shares to their lowest levels in months.