Aerin and Jane Lauder, the granddaughters of Estee Lauder, the late founder of the beauty products company that bears her name, have become billionaires amid a bull market for cosmetics companies.

The sisters, who are among the youngest female billionaires in the world, each control more than 17 million shares of Estee Lauder Cos., according to filings with the U.S. Securities and Exchange Commission. The stock, which they own directly and through family trusts, is valued at about $2.6 billion, according to the Bloomberg Billionaires Index.

The New York-based company’s shares have risen 23 percent this year. Jill Marvin, an Estee Lauder spokeswoman, declined to comment on their net worth.

“The company is continuing to take market share in the global beauty industry as investors flock to stocks which are best in their class,” David Wu, a luxury goods analyst at New York-based Telsey Advisory Group who covers Estee Lauder, said in a telephone interview. “They’re faring even better than their peers.”

Cosmetics stocks have surged in the past year. New York- based Revlon Inc. has risen more than 67 percent, while Paris- based L’Oreal SA and Hamburg, Germany-based Beiersdorf AG are each up about 19 percent.

Aerin, 43, has worked at Estee Lauder for more than two decades and is the company’s style and image director. She also runs a namesake fashion business. She’s married to Eric Zinterhofer, a co-founder of private equity firm Searchlight Capital Partners LLC and the former co-head of media and telecommunications investing at Apollo Global Management LLC.

Share Transfer

Jane, 40, joined the company in 1996. She was promoted to global president and general manager of Estee Lauder’s Origins, Darphin and Ojon brands in last year, according to a press release. She’s married to Kevin Warsh, a former governor of the U.S. Federal Reserve Bank.

The pair also serve on the company’s board alongside their uncle, billionaire Leonard Lauder, and his son, William P. Lauder. The siblings’ father, Ronald Lauder, has a fortune worth at least $3.5 billion, according to the Bloomberg ranking. Leonard Lauder, the company’s emeritus chairman and largest shareholder, has a net worth of $9.5 billion.

Richard Parsons, the former Time Warner Inc. chairman, serves as trustee for the siblings. He approved the transfer of 7.6 million shares on Wednesday to a trust for the benefit of Jane Lauder, according to regulatory filings.

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