Microsoft Stock Drops Amid WinUI Migration to GitHub

Microsoft's stock price dropped by 1.24% to $501.02 on September 1, 2026, following GitHub's announcement that WinUI's open source migration is complete and all development is now visible on GitHub.

The move marks a significant change for the company as WinUI, a core Windows UI framework, will now be developed in public. This shift comes amidst a broader risk-off backdrop, with US stocks experiencing a decline.

Microsoft's strong earnings report from July 29, 2026, which showed EPS of $4.74 and revenue growth of 17.7% year over year, has contributed to the stock's resilience. The company's valuation remains high, with a P/E ratio of 27.90 and a consensus price target of $562.49, implying 12.3% upside from its current price.