Katy Rodan, cofounder of Rodan & Fields. The company generates about $1.7 billion in revenue a year, according to Moody’s Investors Service. Owen Kolasinski/ BFA/REX/Shutterstock ) 
Katy Rodan, cofounder of Rodan & Fields. The company generates about $1.7 billion in revenue a year, according to Moody’s Investors Service. Owen Kolasinski/ BFA/REX/Shutterstock ) 

Billionaire dermatologists secure $600m in debt financing