Microsoft Stock Surges on Revamped AI Platform and Analyst Upgrade

Microsoft's stock price surged 3.7% in morning trading to reach $516.50 following the company's unveiling of a revamped Copilot AI platform.

The platform has been transformed into a unified enterprise 'super app' that combines chat, Office productivity tools, natural-language code generation, and an always-on autonomous AI agent called Autopilot.

This move marks Microsoft's most assertive step yet to convert its vast Microsoft 365 customer base into paying Copilot subscribers, directly challenging rivals such as Anthropic's Claude in the enterprise AI space.

Stifel upgraded MSFT from Hold to Buy on September 23, citing the company's strong fiscal Q4 2026 results and Copilot's surpassing of 30 million paid seats.