Microsoft shares climbed 4% on Friday, 25 September, closing at $517.48 on the Nasdaq after the company unveiled its most extensive Copilot redesign to date. The move lifted the S&P 500 and put the stock on course for its first weekly advance in four weeks.
The overhaul in brief
Chief executive Satya Nadella described the revamped assistant as a "new OS for work," the product of a six-month engineering effort that had leaked in pieces months earlier. The new version began rolling out Friday through Microsoft's Frontier programme. The redesign centers on three pillars: Home, which merges chat and collaboration features while embedding Word, Excel and PowerPoint directly inside the Copilot interface; Code, a natural-language app builder powered by the same technology behind GitHub Copilot; and Autopilot, the renamed Scout agent that operates continuously in the background, tracking channels, advancing conversations and executing recurring tasks without waiting for prompts.
Code and Autopilot rollout
Code will reach early-access customers at the end of September, with Microsoft 365 Premium and Pro subscribers gaining preview access later this year. Autopilot represents the sharpest departure from the chatbot paradigm: instead of responding to user requests, it monitors workflows autonomously, following up on threads and handling repetitive duties on its own.
FinOps for AI and the enterprise focus
The company also introduced FinOps for AI, a framework to help corporate customers track and optimize spending on AI tools. "FinOps for AI is a shared discipline for managing AI spend and optimizing it for business value," Jared Spataro, chief marketing officer for Microsoft AI at Work, wrote in a blog post Friday. While individual users retain access, the overhaul is squarely aimed at enterprise adoption.
Stock context
The rally extended a three-month bull run that has added 38% to the share price, the longest winning streak in a year. That surge has erased earlier year-to-date losses, leaving the stock up 6.80% for 2026 so far. The year has been marked by sharp swings driven by geopolitical tension and rising bond yields, while frontier AI developers earlier this month warned that progress in the field may be slowing.