Signa Sports United N.V.. Replay the stock market charts of SSU day by day, back to 2003. Open long and short positions without spending any money. SIGNA Sports United N.V. operates online sports web shops in the European Union, Switzerland, Norway, the United Kingdom, and the United States. Its product categories include bike, tennis/racket sports, outdoor, and team sports and athleisure. The company is headquartered in Berlin, Germany.