Bristol Myers Squibb operates a pure-play, high-margin biopharmaceutical model. The company generates, multi-billion-dollar cash flow by holding temporary, government-granted monopolies (patents) on complex, expensive biologic drugs. To survive the brutal 'patent cliff' (when generic competitors destroy revenue), the company leverages its extensive cash flow to execute aggressive, multi-billion-dollar acquisitions of smaller biotech startups, essentially outsourcing its early-stage R&D. Bristol-Myers Squibb operates a focused, research-intensive biopharmaceutical model, generating revenue primarily through the discovery, development, and commercialization of complex specialty medicines in oncology, hematology, and immunology. The company heavily relies on securing exclusive patents for breakthrough therapies (like Opdivo and Eliquis), allowing it to command premium pricing in the U.S. and European markets during the exclusivity period. Because internal drug discovery is risky and frequently results in failure, BMS pursues a strategy of 'external innovation', utilizing its cash flow to acquire promising clinical-stage biotech companies (such as its transformational acquisition of Celgene). This acquisition-driven pipeline replenishment is critical to offset the severe revenue cliffs that occur when older blockbuster drugs lose patent protection and face cheap generic competition. The company maintains a lean commercial infrastructure by focusing exclusively on severe diseases treated by medical specialists, avoiding the sales forces required for primary care drugs.