Pfizer is one of the world's largest pharmaceutical companies, with medicines and vaccines spanning oncology, immunology, cardiology and infectious disease. Its COVID-19 vaccine and antiviral generated windfall revenue that the company redeployed into acquisitions, most notably the cancer specialist Seagen. Pfizer's scale in manufacturing and global distribution lets it move new science to market quickly. The dividend is a core part of the shareholder proposition, maintained through the industry's constant cycle of patent expirations and pipeline renewal.