Allen Klein (1931–2009) was an American businessman and music industry executive known for his role as a pioneering music manager. With immense expertise in artist management, Klein revolutionized the industry by negotiating lucrative deals for renowned artists like The Rolling Stones and The Beatles. His shrewd negotiation skills and sharp business acumen earned him the reputation of a fierce negotiator. As the founder of ABKCO Music & Records, Klein's influence was felt across the industry, leading to significant changes in the way musicians were paid and their rights protected. Despite some controversy surrounding his business practices, his impact on the music world remains undeniable. Allen Klein's legacy as a trailblazing music manager continues to inspire aspiring professionals in the industry.