GlaxoSmithKline PLC, better known as GSK, is a pharmaceutical company. GSK manufactures products for major disease areas such as asthma, cancer, infections, diabetes, and mental health, and it also has a portfolio of vaccines. Operating in more than 115 countries, GSK is also engaged in the consumer healthcare business in oral health, pain relief, respiratory, nutrition/gastro-intestinal, and skin health categories.
The market capitalization of a company, more simply referred to as "market cap", is the total market value of a publicly traded company's outstanding shares. It is often considered as a key indicator of what a company is worth.