The Billionaire's Inner Circle: 7 Facts About Elon Musk's Siblings And Their Multi-Million Dollar Empires

The name Musk is synonymous with disruption, innovation, and a relentless pursuit of ambitious, world-changing projects. While the world's focus is often laser-fixed on Elon Musk—the mind behind Tesla, SpaceX, and X (formerly Twitter)—he is just one part of a powerful, complex family unit. His siblings, both full and half, have carved out their own multi-million dollar empires across sustainable food, Hollywood, and technology, proving that entrepreneurial drive runs deep in the family's South African roots. This article, updated for , offers a deep, current look into the lives, careers, and net worths of the entire Musk sibling cohort.

Far from riding on their famous brother's coattails, Kimbal and Tosca Musk, along with their half-siblings, are successful entrepreneurs, filmmakers, and executives. Their collective story is a fascinating blend of shared childhood experiences in Pretoria, South Africa, and wildly divergent paths in business, media, and even a controversial family dynamic that continues to make headlines. Understanding the Musk family tree is essential to grasping the full scope of their collective influence on the global stage.

The Complete Musk Sibling Biography & Profile

The Musk family structure is complex, stemming from the marriages and relationships of their father, Errol Musk, and mother, Maye Musk. Elon Musk has two full siblings and four younger half-siblings, totaling six siblings.

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• Elon Reeve Musk
  • Date of Birth: June 28, 1971
  • Place of Birth: Pretoria, Transvaal, South Africa
  • Current Profession: CEO of SpaceX, CEO of Tesla, Owner/CTO of X (formerly Twitter), Founder of The Boring Company and Neuralink.
• Kimbal James Musk (Full Brother)
  • Date of Birth: September 20, 1972
  • Place of Birth: Pretoria, Transvaal, South Africa
  • Current Profession: Restaurateur, Philanthropist, Co-founder of The Kitchen Restaurant Group, Director at Tesla and SpaceX.
• Tosca Jane Musk (Full Sister)
  • Date of Birth: July 20, 1974
  • Place of Birth: Pretoria, Transvaal, South Africa
  • Current Profession: Filmmaker, Producer, Co-founder and CEO of Passionflix.
• Alexandra Musk (Half-Sister)
  • Parentage: Errol Musk & Heide Bezuidenhout
  • Current Profession: Executive/VP of Brand & Business Development at SolarWindow Technologies Inc.
• Asha Rose Musk (Half-Sister)
  • Parentage: Errol Musk & Heide Bezuidenhout
  • Current Profession: Student, reportedly pursuing environmental engineering.
• Elliot Rush Musk (Half-Brother)
  • Parentage: Errol Musk & Jana Bezuidenhout (Errol's former stepdaughter)
  • Date of Birth: 2017
• Daughter (Half-Sister)
  • Parentage: Errol Musk & Jana Bezuidenhout
  • Date of Birth: ~2019/2020 (Name not widely publicized)

Kimbal Musk: The Food Entrepreneur Who Sits on the Tesla Board

Kimbal Musk is arguably the second most famous sibling, not only for his own significant ventures but also for his deep, ongoing involvement with his brother's companies. He and Elon's entrepreneurial journey began together with the software company Zip2 in the mid-1990s, which they later sold for a significant profit.

A Net Worth Built on Food and Tech

While his brother focuses on rockets and electric vehicles, Kimbal's passion lies in the food industry, specifically in the realm of food sustainability and conscious consumption. He is the co-founder of The Kitchen Restaurant Group, a collection of restaurants focused on "real food" and community-centric dining.

Despite his focus on food, a large portion of Kimbal Musk's substantial net worth—estimated to be between $500 million and $900 million as of 2025—is tied up in his investments in Tesla and SpaceX. He has served as a Director on the board of Tesla since 2004 and on the board of SpaceX, making him a key figure in the corporate governance of the world's most valuable companies. His recent activities include selling significant amounts of Tesla stock, a move often scrutinized by the financial press.

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Kimbal is also the co-founder of the non-profit organization Big Green, which builds "Learning Gardens" in schools across the United States, further cementing his commitment to food education and sustainability.

Tosca Musk: The Hollywood Mogul of Romance Streaming

Tosca Musk, the youngest of the three full siblings, has successfully navigated the challenging entertainment industry to build her own niche empire. A South African-born filmmaker and producer, Tosca's career is defined by her focus on digital content and streaming.

The Rise of Passionflix

Her most notable venture is Passionflix, a global streaming service she co-founded and serves as CEO. Passionflix specializes in adapting best-selling romance novels into feature films and series, filling a gap in the streaming market for high-quality romantic content. This focus has earned her a dedicated subscriber base and a net worth estimated at around $170 million.

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Tosca has often spoken about the challenges of raising capital in Hollywood, noting that the Musk name sometimes led to investors trying to overcharge her, assuming she had unlimited access to her brother's wealth. She credits her mother, Maye Musk, a celebrated model and dietitian, for instilling a strong work ethic.

The Lesser-Known Half-Siblings: From Environmental Engineering to Controversial Paternity

The family tree extends further through Errol Musk's subsequent relationships, leading to four younger half-siblings for Elon, Kimbal, and Tosca. These individuals maintain a lower public profile but are also pursuing notable careers.

Alexandra and Asha Rose Musk

Alexandra Musk and Asha Rose Musk are Errol's daughters from his second marriage to Heide Bezuidenhout. Alexandra has established a career in the technology sector, holding the position of Vice President of Brand & Business Development at SolarWindow Technologies Inc., a company focused on generating electricity from windows. Her role involves strategic partnerships and industry engagement, aligning with the Musk family's legacy of innovative ventures.

Asha Rose Musk, who often goes by her middle name, is reportedly pursuing a degree in environmental engineering. This academic focus suggests a commitment to sustainability, echoing the themes found in the work of both Elon (Tesla, SolarCity) and Kimbal (Big Green).

The Youngest Siblings and Family Controversy

Errol Musk also fathered two children with his former stepdaughter, Jana Bezuidenhout, whom he helped raise from the age of four. This controversial dynamic resulted in the birth of a son, Elliot Rush Musk (born 2017), and a daughter (born ~2019/2020). While the children are too young for professional careers, their existence adds a layer of complexity to the already high-profile Musk family saga. The family's dynamics, including their shared South African heritage and the influence of their parents, Maye and Errol, continue to be a subject of public fascination.

The entire Musk family, from the titans of industry to the emerging executives, demonstrates a powerful, shared drive for success. Whether through space exploration with SpaceX, electric vehicles with Tesla, sustainable food with The Kitchen, or digital media with Passionflix, the siblings of Elon Musk are building their own legacies in diverse and impactful fields.