The 20-year-old model appeared on Wall Street in a shiny black dress, with the likes of Vera Wang, Jaime King and model Coco Rocha.
DKMS is an international non-profit organization dedicated to fighting blood cancer, and this glamorous charity gala attracts many stars.
This mop long skirt is simple and elegant, with belt detailing tightening her small waist.
She showed off her natural beauty and opted for a simple outfit that included light-colored mascara.
Coco Rocha, a 33-year-old supermodel, is followed, dressed in a haute couture black gown with feathered tulle detailing on his arms.
While she and Kaia opted for classic shades, Jaime King, 42, wore a strapless outfit in red and black tones with a bow on the front and white glove-like sleeves.
DKMS was founded in Germany in 1991 by Katharina's father, Peter, to find more unrelated stem cell donors to save his wife who was battling leukemia and needed a bone marrow transplant.
The organization now has donation centers in India, Poland, Chile, the United Kingdom and Africa, and has become the world's largest registry of stem cell donors, dedicated to providing life-giving opportunities to patients with blood cancers or life-threatening blood diseases.