Atlassian Corporation PLC's stock experienced a significant after-hours plunge of 7.08% on Wednesday, reversing momentum from the regular trading session.

The sharp decline appears to be primarily driven by a major analyst action from BofA Securities, which significantly lowered its price target on the company to $84 from $150 while maintaining a Buy rating. This near 44% reduction in the price objective likely dampened investor sentiment and triggered profit-taking activity.

The negative reaction to the revised target overshadowed positive developments announced earlier, including an expanded partnership with Google Cloud to integrate AI capabilities across enterprise collaboration tools. The after-hours movement suggests the market is focusing on the substantial downward revision in valuation expectations from a major financial institution.