The magazine values her company at worth almost $800 million - and Jenner owns 100 percent of it.
"I said, 'I'm ready to put up my own money".
A comparatively small part of Jenner's fortune, around $100m, comes from endorsement deals with Puma, PacSun clothing, diet teas and other slimming products as well as her appearances on two reality shows: Keeping Up with the Kardashians and her spin-off series Life of Kylie.
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According to the mag, Kylie is worth $900 million - also making her the youngest person on their annual ranking of America's Richest Self-Made Women. I have such easy access to my fans and my customers'.
"Before I even refreshed the page, everything was sold out", Jenner said. "I was insecure about my lips, and lipstick is what helped me feel confident".
She has a handful of full time employees, a factory in China and her marketing and finances are managed by the Kardashian matriarch, Kris Jenner.
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Jenner said she got the idea to launch her signature "lip kits" because she loved putting on lip liner as a teenager.
The company was launched with $250,000 (£188,000) of Kylie's own money she had earned from modelling; she produced 15,000 lip kits and teased the launch for months on Instagram.
There has always been rumors that Kylie Jenner's Kylie Cosmetics (the brand that launched the OG lip kit and a million copycats) was on its way to being a billion-dollar business, and now it appears that historic milestone is closer than ever. She has become so dominant on social media that when she tweeted that she had become bored with Snapchat, its parent company's stock lost 6% of its value within a day, around $1.3bn.
The success of Kylie Cosmetics is mostly linked to the new mom's legion of loyal social media followers, who are quick to snatch up whatever items she promotes.
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