G-III, which owns brands including DKNY and Jessica Howard, will purchase the additional stake from a group of investors led by Fred Gehring of Amlon Capital BV. The apparel maker first acquired a stake in the brand in 2015.
G-III said it expects the brand to represent more than 2 billion USD in retail sales.
Launched in 1984 by German fashion designer Karl Lagerfeld - known for his association with luxury brands Chanel and Fendi - the eponymous brand offers Parisian fashion combined with rock-chic styles, sported by everyone from model Kate Moss to Formula 1 star Lewis Hamilton.
The fashion icon passed away in 2019.
Karl Lagerfeld has approximately 120 company and partner-operated stores worldwide.
