GSK, also known as GlaxoSmithKline, is a global pharmaceutical and healthcare company based in the United States. The company has a rich history that dates back to the 19th century with the establishment of several predecessor companies. GSK's headquarters is located in Philadelphia, Pennsylvania.

The main products and services offered by GSK include prescription medicines, vaccines, and consumer healthcare products. They have a wide range of pharmaceuticals that cater to various therapeutic areas such as respiratory, oncology, and infectious diseases. Additionally, they have a strong presence in the development and production of vaccines, including leading vaccines for conditions like hepatitis, influenza, and meningitis.

GSK also produces popular consumer healthcare products like toothpaste, over-the-counter medicines, and health drinks. GSK operates on a global scale with subsidiaries, joint ventures, and partnerships in many countries. Notable subsidiaries include GSK Pharmaceuticals Ltd in India, GlaxoSmithKline Consumer Healthcare Ltd in the UK, and ViiV Healthcare, a joint venture with Pfizer and Shionogi focused on HIV treatment.

The company also has research and development collaborations with various academic institutions and biotech companies. In terms of market position, GSK is one of the largest pharmaceutical companies worldwide. It consistently ranks among the top pharmaceutical companies in terms of global sales.

GSK faces competition from other multinational pharmaceutical companies such as Pfizer, Johnson & Johnson, and Novartis. GSK has undergone several major events and changes in its strategy and product lineup. In recent years, the company has focused on reshaping its portfolio by divesting non-core businesses and acquiring new assets to strengthen its core areas of focus.

GSK has also been investing heavily in research and development to bring innovative medicines and vaccines to market. As of the latest updates, GSK continues to be a major player in the pharmaceutical industry. The company is actively involved in the development and distribution of COVID-19 vaccines, demonstrating its commitment to public health.

GSK's ongoing efforts to expand its product pipeline, partnerships, and global presence are indicative of its determination to maintain its position as a leading healthcare company