Bayer AG is a German multinational pharmaceutical and life sciences company. It was founded in Barmen, Germany in 1863 by Friedrich Bayer and Johann Friedrich Weskott. Originally a dyestuffs factory, Bayer quickly expanded into pharmaceuticals, chemicals, and agricultural products.

The company's headquarters are located in Leverkusen, Germany. The headquarters is a large complex, housing research and development laboratories, manufacturing facilities, administration offices, and other facilities. It is a significant site for Bayer's global operations and serves as a hub for innovation and decision-making.

Bayer offers a wide range of products and services across its divisions: Pharmaceuticals, Consumer Health, Crop Science, and Animal Health. In the pharmaceuticals segment, Bayer develops and sells prescription medications, primarily in the areas of cardiology, oncology, women's health, and radiology. Its Consumer Health division focuses on over-the-counter medications, nutritional supplements, and personal care products.

The Crop Science division is a leading player in the agricultural industry, offering seeds, crop protection products, and digital farming solutions. Bayer's Animal Health division provides products and services for the prevention and treatment of diseases in livestock and pets. Bayer operates on a global scale, with subsidiaries, joint ventures, and partnerships in numerous countries.

Noteworthy subsidiaries include Bayer CropScience, Bayer Animal Health, and Covestro (formerly Bayer MaterialScience). The company also has collaborations with various research institutions and universities worldwide. In terms of market position, Bayer is one of the largest pharmaceutical companies globally.

It consistently ranks among the top companies in terms of global sales, competing with other industry giants such as Novartis, Pfizer, and Roche. Bayer's Crop Science division is also a major player in the agricultural sector, with a significant market share. Notable events in Bayer's history include the development and introduction of Aspirin in 1899, and the acquisition of Monsanto in 2018, which strengthened Bayer's position in the agricultural industry.

The company has continuously evolved its product lineup and strategy, focusing on innovation, sustainability, and digitalization to drive growth and meet the changing needs of its customers. As of the latest available information, Bayer continues to operate as a global leader in pharmaceuticals and life sciences. It remains committed to research, development, and sustainability efforts, striving to improve the quality of life for people and animals worldwide