Fresenius Medical Care AG & Co. KGaA is an American-German healthcare company which provides kidney dialysis services through a network of 4,171 outpatient dialysis centers, serving 345,425 patients. The company primarily treats end-stage renal disease, which requires patients to undergo dialysis 3 times per week for the rest of their lives. With a global headquarters in Bad Homburg vor der Höhe, Germany, and a North American headquarters in Waltham, Massachusetts, it has a 38% market share of the dialysis market in the United States. It also operates 42 production sites, the largest of which are in the U.S., Germany, and Japan. The company is 32% owned by Fresenius and, as of 2020, generates around 50% of the group's revenue. The company is on the Best Employers List published by Forbes. Wikipedia