Roundup: Bank of America / Microsoft’s AI backbone / New blood pressure device

Bank of America spends over $250 million annually on GLP-1 weight loss drugs for employees, combining access with health coaching to reduce long-term healthcare costs. Microsoft reported $24.1 billion in AI revenue from OpenAI, which constitutes 70% of its AI business, despite diversification efforts. Vital Signals raised $15 million to launch a $399 cuffless blood pressure wearable, Signal Ring, entering a competitive market with unproven real-world reliability.