Elon Musk is the world's richest person and richest tech billionaire, with about $942 billion in mid-September 2026. He sits far ahead of Larry Page at $277.9 billion, backed mainly by Tesla stock, SpaceX control, AI holdings, and modest housing.
A Schedule 13G is a U.S. filing that discloses large beneficial ownership in a public or reporting company. According to USA Today reporting Forbes Real-Time Billionaires, Musk's lead comes from concentrated equity rather than cash USA Today Forbes ranking report.
Table of Contents
- How big is his Tesla stake?
- How large is his SpaceX holding?
- Where do xAI and X fit?
- What about Neuralink and housing?
How big is his Tesla stake?
His largest public-company asset is Tesla. A June 17 2026 Schedule 13G reported 699,580,882 shares, or 19.9% of Tesla.
The total includes service-vesting restricted shares and options. Electrek, citing SEC Schedule 13G and Form 4 filings, detailed the exercise tied to his 2018 pay package Electrek on Musk Tesla filing.
How large is his SpaceX holding?
His largest private asset is SpaceX. An Aug.
13 2026 Schedule 13G reported beneficial ownership of 6,418,547,515 Class A shares, or 48.4%. The figure includes Class B options exercisable within 60 days. Digital Trading Lab, summarizing SEC filings, places that SpaceX position at the core of his private wealth Digital Trading Lab on SEC filings.
Where do xAI and X fit?
SpaceX merged with Musk's AI company xAI in an all-stock deal completed Feb. 2 2026. The combined valuation was $1.25 trillion, with SpaceX at $1 trillion and xAI at $250 billion.
The merger came ahead of a planned record IPO. xAI had separately been in advanced talks in November 2025 to raise $15 billion at a $230 billion valuation. The AI business had acquired X, formerly Twitter, which Musk bought for $44 billion in 2022. SpaceX and Tesla had each made $2 billion investments in xAI.
What about Neuralink and housing?
Musk's brain-implant company is Neuralink. It raised $600 million at a $9 billion pre-money valuation in May 2025. It closed at $650 million in June 2025 with investors including ARK, Sequoia, Founders Fund, Thrive and QIA. After posting "Will own no house" on May 1 2020, he sold seven California homes for roughly $100-$130 million by 2022. He now primarily rents a 375-400 sq ft Boxabl prefabricated home from SpaceX near Starbase, Boca Chica, Texas.
The unit is valued at about $50,000. These figures move quickly because SpaceX, xAI, Neuralink and Boring Co. are private. Forbes recorded a $363 billion July drop then a $202 billion August 2026 rebound. Lenders, shareholders and tax authorities should treat the headline number as illiquid and timing-sensitive, not cash.