J. Alexander Martin is an American entrepreneur and businessman, best known as the co-founder of the clothing brand FUBU. He played a significant role in the brand's rise to prominence in the 1990s, which focused on urban fashion and appealed to a diverse audience. Martin's vision helped shape the brand's identity and market presence. In addition to his work with FUBU, Martin has appeared on the reality television show Shark Tank, where he showcased his business acumen and investment strategies. His experience in the fashion industry and entrepreneurship has made him a respected figure in business circles.