Microsoft Rises on $37B AI Run Rate, Cloud Growth

Microsoft shares climbed 5.45% to close at $450.24 on May 29, 2026, driven by reports that the company’s artificial intelligence business has surpassed a $37 billion annual revenue run rate [1]. The surge in trading volume, which reached 77.2 million shares, underscored investor enthusiasm for the tech giant’s strategy of integrating AI tools directly into its Azure cloud and Microsoft 365 software suites [1].

Key takeaways

• Microsoft stock closed at $450.24, a 5.45% increase, with trading volume 124% above its three-month average [1].
• The company reported its AI business exceeded a $37 billion annual revenue run rate, signaling strong demand for cloud and software services [1].
• Broader markets rose, with the S&P 500 adding 0.23% and the Nasdaq Composite gaining 0.22%, while peers Apple and Alphabet lagged behind [1].
• Microsoft is developing in-house AI models to manage costs and pricing flexibility, though it remains partnered with OpenAI [1].

AI Revenue Drives Stock Surge

The stock’s performance marked a strong session compared to industry peers, as Apple closed down 0.14% and Alphabet fell 2.51% [1]. Microsoft’s rally was fueled by the disclosure that its AI segment is now generating significant revenue, reinforcing the company's advantage in embedding AI into existing developer workflows and productivity tools rather than treating it as a standalone product cycle [1]. Investors are closely monitoring how the company’s usage-based pricing and hybrid AI-cloud model will sustain this growth over time [1].

Strategic Shifts Toward In-House Models

Beyond the revenue figures, reports indicate Microsoft is preparing more in-house AI models as a cost-control measure [1]. This strategic move is not intended to replace the company’s partnership with OpenAI but rather to provide greater flexibility regarding which AI workloads are run and how features are priced [1]. The company aims to balance the margin pressure associated with higher AI usage with the profitability of its cloud business, a dynamic that future earnings reports will likely clarify [1].

Why it matters

The $37 billion run rate provides a concrete metric for investors to assess how AI demand is translating into financial results [1]. Future product updates and earnings data will be critical in determining whether increased adoption of Azure and Microsoft 365 Copilot can continue to drive revenue growth while maintaining healthy margins in the cloud sector [1].