Moderna generates revenue through three primary streams that together produced $1.944 billion in fiscal year 2025: Net Product Sales, Collaboration Revenue, and Other Revenue. Net Product Sales constitute the overwhelming majority of the business, generating $1.818 billion in 2025, down from $3.109 billion in 2024, and representing approximately 94% of Total Revenue. This stream includes direct sales of Spikevax, mNEXSPIKE, and mRESVIA to government procurement agencies, retail pharmacies, hospital systems, and international distributors. In 2025, U.S. product sales totaled $1.2 billion, or 62% of net product sales, while international sales contributed $745 million, or 38%. The U.S. revenue concentration reflects the seasonal nature of COVID and RSV vaccination, with demand concentrated in fall and winter months. The Other Revenue stream, which includes grant revenue, collaboration milestones, and stand-ready manufacturing revenue from long-term strategic partnerships, added $126 million in 2025. Collaboration Revenue from partnerships with Merck, AstraZeneca, and other biotechnology companies has historically contributed to Moderna's financials but declined as the company focused on proprietary products. The loss of Spikevax Product Sales would be catastrophic to Moderna's current financial architecture; COVID vaccine sales generated $1.8 billion in 2025 and remain the company's dominant revenue source, though declining at double-digit rates as the market transitions from pandemic to endemic. The mNEXSPIKE next-generation vaccine, approved in 2025, represented approximately 24% of all U.S. retail COVID vaccinations in its first year, generating an estimated $400-500 million in revenue. The mRESVIA RSV vaccine, approved in 2024 and expanded to high-risk adults 18-59 in 2025, generated negligible sales amid competition from Pfizer's Abrysvo and GSK's Arexvy, which together dominate the $1.5 billion RSV vaccine market. Moderna's cost of sales was $868 million in 2025, or 48% of net product sales, including $88 million in third-party royalties and $291 million in inventory write-downs. This cost structure reflects the challenges of maintaining pandemic-scale manufacturing capacity for seasonal demand, with unutilized manufacturing capacity and wind-down costs contributing to margin pressure. The company's gross margin is negative when including inventory write-downs and capacity underutilization, a structural problem that the cost-reduction program aims to address. Research and development expenses were $3.1 billion in 2025, a 31% decrease from $4.5 billion in 2024, reflecting the wind-down of large Phase 3 respiratory programs and portfolio prioritization. Selling, general, and administrative expenses were $1.0 billion in 2025, a 13% decrease from 2024. The company's business model depends on a global commercial infrastructure of approximately 1,000 sales and marketing employees who operate in 18 countries, selling to government health agencies, pharmacy chains, and physician practices. The model also depends on maintaining manufacturing capacity at facilities in Massachusetts, New Hampshire, and international sites in the UK, Canada, and Australia, even as demand fluctuates seasonally. The company's revenue model is therefore characterized by high fixed costs, seasonal demand concentration, and a transition from government advance purchase agreements to retail commercial sales, creating significant financial volatility. The company's supply chain strategy includes dual sourcing for critical raw materials such as lipid components and nucleotides, reducing dependence on single suppliers and ensuring continuity of production. The regional distribution centers in the United States, Europe, and Asia-Pacific reduce shipping costs and improve product availability for seasonal vaccination campaigns. The company's quality systems, which were built to support pandemic-scale production of billions of doses, provide a foundation for maintaining compliance across multiple facilities and products, but also create fixed costs that are difficult to reduce proportionally with volume declines. The company's patient support programs, including financial assistance for uninsured patients and vaccination education initiatives, aim to improve access and adherence, but these programs add to the cost structure without generating direct revenue. The company's digital health initiatives, including mobile applications for vaccination scheduling and reminder systems, could improve patient engagement and provide commercial insights, but require ongoing investment in software development and data analytics. The company's environmental commitments, including carbon neutrality goals for manufacturing operations, reflect stakeholder expectations but add to operational costs. The integration of these operational capabilities into a cohesive commercial strategy is a significant challenge for a company that has historically focused on scientific development rather than commercial execution. The business model must therefore evolve from a pandemic-focused, government-contracting model to a diversified, commercially-driven model that can generate sustainable profits in competitive markets.