Microsoft (MSFT) shares are just below 2025-highs after a huge post-earnings rally. The company's up 30% from 52-week lows hit in early April. Caroline Woods notes a report adding to MSFT's upward move today, suggesting the Big Tech giant is revising its partnership with ChatGPT's parent company, OpenAI, ahead of a potential IPO. That said, regulation headwinds can challenge MSFT stock's run to a new all-time high.