2. But a few standout names were inducted into the 3-comma club this year.
Social media and makeup mogul Kylie Jenner, then 21, made headlines when Forbes declared her “the world’s youngest self-made billionaire” in March. Jenner, who turned 22 in August, has built up a $1.2 billion cosmetics empire, starred alongside her family in “Keeping Up with the Kardashians” as well as in her own spin-off show “Life of Kylie,” started a clothing line with sister Kendall, and made millions promoting products on Instagram.
Musician Jay-Z (net worth: $1 billion as of June 2019), Jeff Bezos’ ex-wife MacKenzie Bezos, David Koch’s widow Julia Flesher Koch ($42.7 billion), Proactiv founders Katie Rodan and Kathy Fields ($1.5 billion each as of March 2019), Zoom CEO Eric Yuan ($3 billion as of April 2019), and Slack CEO Stewart Butterfield ($1.6 billion as of June 2019) also became billionaires this year, Business Insider previously reported.