Fresenius is a pharmaceutical company that focuses on developing and manufacturing drugs and medical devices for a variety of therapeutic areas, including renal and critical care, infusion therapy, and oncology. The company was founded in 1912 and has since expanded its portfolio to include a range of pharmaceutical products for treating conditions such as chronic kidney disease, cancer, and infectious diseases. Fresenius is known for its expertise in renal therapeutics and has made significant contributions to the field of nephrology.