The simplest way to understand how Oracle makes money: imagine you're a Fortune 500 bank. Your core ledger — the system that processes every transaction, every balance, every regulatory report — runs on Oracle Database. It's been running there since 1997. Twenty-seven years of stored procedures, custom integrations, compliance logic, and institutional knowledge are baked into that system. Migrating away would cost $200 million and take four years, with meaningful risk of catastrophic failure during the transition. So you don't migrate. You renew your license support contract every year. That's roughly $25 billion of Oracle's annual revenue right there — license support fees from customers who renew at rates above 90% because the alternative is operationally terrifying. It's the most beautiful recurring revenue stream in enterprise software, and it requires almost no incremental cost to maintain. Now layer the rest on top. Cloud services account for approximately 55% of Oracle's $57.4 billion FY2025 revenue and are growing 44% year-over-year. This breaks into two pieces: Oracle Cloud Infrastructure (OCI), which is the compute-and-storage business competing with AWS and Azure, and Cloud Applications, which includes Fusion ERP, Fusion HCM, NetSuite for midmarket companies, and Cerner for healthcare. OCI is the exciting part. It's growing north of 50% annually because Oracle figured out something counterintuitive — you don't need to win the general cloud market to build a massive infrastructure business. You just need to win the workloads that require specific performance characteristics. AI training on NVIDIA GPU superclusters? Oracle offers bare-metal access with lower latency than AWS. Database workloads that are already Oracle-native? OCI eliminates the rewrite. The on-premise license business (about 8% of revenue) is declining but still throws off cash from customers buying new perpetual licenses. Hardware and services (roughly 12%) includes Exadata engineered systems and consulting. Neither is growing, but both generate margin. The $28.3 billion Cerner acquisition in 2022 deserves separate attention. Oracle bought the largest electronic health records platform in America and is attempting to modernize hospital IT infrastructure — a market where switching costs are even higher than in banking because patient safety is at stake. The net income picture tells you something important: $12.4 billion on $57.4 billion revenue is a 21.7% net margin, which sounds decent until you realize Oracle carries $80-90 billion in long-term debt from its acquisition spree. Strip out interest expense and the underlying operating economics are closer to 35-40% margins. The debt is the price Oracle paid to assemble this portfolio through force rather than organic growth. Cloud and software combined now represent 88% of total revenue. The transition from perpetual licenses to recurring subscriptions is essentially complete. What Oracle is really selling, if you step back, isn't software or cloud or databases. It's the cost of change. Every year that a customer doesn't migrate away, Oracle's pricing power compounds. And every year, Oracle makes the migration path to its own cloud slightly easier than the migration path to anyone else's.