World's Top Billionaires: Who They Are, What They Do, and Their Stock Investments
Ever wondered who the wealthiest people in the world really are? In this detailed blog post, we explore the profiles of top billionaires like Stephen Schwarzman, Lei Jun, Jacqueline Mars, John Mars, Ken Griffin, Colin Huang, Dieter Schwarz, and Mark Mateschitz. Learn about their businesses, whether they have public companies, their current share prices, and more. This guide will help investors and curious readers understand the business empires behind these massive fortunes.
Stephen Schwarzman
Who he is: Stephen Schwarzman is the Chairman and CEO of Blackstone Group, the world's largest alternative investment firm, with assets under management exceeding $1 trillion.
What he does: Schwarzman co-founded Blackstone in 1985, focusing on private equity, real estate, hedge funds, and credit. He is known for major buyouts and strategic investments worldwide.
Company Stock: Blackstone Inc. (BX) is publicly listed on the NYSE. As of July 2025, its share price is around $120 USD, but prices fluctuate with market trends.
Lei Jun
Who he is: Lei Jun is the founder and CEO of Xiaomi Corporation, one of the world’s leading smartphone and consumer electronics brands.
What he does: Lei Jun built Xiaomi into a household name for affordable, high-tech gadgets and smart home devices, competing strongly with giants like Apple and Samsung.
Company Stock: Xiaomi Corporation (1810.HK) is listed on the Hong Kong Stock Exchange. As of July 2025, the share price is approximately HK$16 per share. Investors love Xiaomi for its rapid growth in Asia and Europe.
Jacqueline Mars & John Mars
Who they are: Jacqueline and John Mars are heirs to the Mars, Inc. fortune, the global candy giant behind brands like M&M’s, Snickers, and Pedigree pet food.
What they do: Mars, Inc. is a private company, so the Mars family wealth is based on its private valuation. They continue to expand their confectionery and pet food empire globally.
Company Stock: Mars, Inc. is not publicly traded. You cannot buy Mars shares on the stock market. The family keeps the business tightly held and privately managed.
Ken Griffin
Who he is: Ken Griffin is the founder and CEO of Citadel LLC, one of the largest hedge funds in the world.
What he does: Griffin’s Citadel is known for its aggressive investment strategies in equities, fixed income, commodities, and credit. He is a major political donor and real estate investor too.
Company Stock: Citadel LLC is privately held. Its hedge fund operations are not listed on the stock exchange. However, investors track its performance through hedge fund indices and regulatory filings.
Colin Huang
Who he is: Colin Huang is the founder of Pinduoduo Inc., one of China’s largest e-commerce platforms, which focuses on social buying and deep discounts.
What he does: Huang built Pinduoduo into a household name in China, targeting price-conscious shoppers with interactive group buying and agricultural supply chain innovations.
Company Stock: Pinduoduo Inc. (PDD) is listed on the NASDAQ. As of July 2025, its share price is around $150 USD. It’s popular among investors looking for growth in Chinese e-commerce.
Dieter Schwarz
Who he is: Dieter Schwarz is the owner of Lidl and Kaufland, Europe’s largest grocery retail chains under the Schwarz Group.
What he does: The Schwarz Group has revolutionized discount retailing in Europe with Lidl’s low-cost model. The company is privately owned, and Schwarz is famously media-shy.
Company Stock: Lidl and the Schwarz Group are privately held. There is no publicly traded stock for Lidl, so retail investors cannot buy shares directly.
Mark Mateschitz
Who he is: Mark Mateschitz is the son of Dietrich Mateschitz, co-founder of Red Bull, the iconic energy drink brand.
What he does: He inherited a 49% stake in Red Bull GmbH and oversees its growth, sponsorships in extreme sports, and marketing innovations.
Company Stock: Red Bull GmbH is privately held. There are no shares available on the public stock market.
Conclusion
These billionaires shape the global economy through investments, innovation, and bold business moves. Some, like Stephen Schwarzman and Colin Huang, lead companies you can invest in directly through the stock market. Others, like the Mars family and Dieter Schwarz, run highly profitable but private empires. Whether you want to invest like them or simply learn their stories, understanding who they are and what they do is crucial for any aspiring investor.
Want more deep dives into billionaire businesses? Check our other posts like Top 10 Hidden Billionaires You Never Heard About or Best Stocks Inspired by Billionaire Portfolios.
Disclaimer: This article is for informational purposes only. Please do your own research or consult a financial advisor before making any investment decisions.
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