This comes after SpaceX, his private aerospace company, launched a December tender offer valuing the firm at $800 billion, double its worth in August, according to two investors who spoke to Forbes. 

Musk, who owns roughly 42% of SpaceX, sees his stake alone jump by an estimated $168 billion, bringing his total net worth to around $677 billion as of Monday noon Eastern Time.

SpaceX is preparing for a public offering in 2026, which could value the company near $1.5 trillion. Even without the IPO, Musk’s SpaceX holdings are now his single most valuable asset. 

Tesla is a major contributor too; his 12% stake in the electric vehicle company is estimated at $197 billion. Meanwhile, Musk is appealing a Delaware court decision that voided parts of his 2018 CEO Performance Award, which Forbes has discounted by 50% pending the outcome, currently estimated at $69 billion.

Musk’s reach extends beyond Tesla and SpaceX. His AI startup, xAI Holdings, is reportedly in talks to raise $15 billion in new funding at a $230 billion valuation, double its March 2025 valuation of $113 billion. Musk owns 53% of xAI, which Forbes estimates at $60 billion.

Tesla shareholders have also approved a record-breaking $1 trillion pay plan for Musk, contingent on achievements such as growing Tesla’s market capitalisation eightfold over the next decade. “Mars shot” targets like this show Musk’s vision of merging electric vehicles with robotics and AI.

Over the past five years, Elon Musk has repeatedly rewritten the record books, making the $600 billion worth no surprise.

He was worth $24.6 billion in March 2020, surpassed $100 billion in August 2020, $200 billion in 2021, $300 billion later that year, $400 billion in December 2024, and $500 billion in October 2025. His lead over the second-richest person, Google co-founder Larry Page, now sits at $425 billion.

SpaceX’s growth, particularly through Starlink’s expansion to over three million subscribers and ventures into aviation and maritime internet services, is a key driver of Musk’s wealth surge. 

Tesla, despite slower sales, has seen its stock climb 13% this year, partly due to investor confidence in Musk’s robotics and autonomous vehicle ambitions.

If the SpaceX IPO meets its projected valuation, Musk could soon become the first trillionaire in history.

The transaction makes OpenAI the most valuable private company in the world, surpassing Elon Musk’s SpaceX, which is valued at $456 billion.

The deal was structured as a secondary sale, allowing staff and former insiders to cash out without the company going public. OpenAI had authorised up to $10.3 billion in stock sales, but only two-thirds were sold. Internally, this limitation is seen as a sign that many employees trust the company’s long-term prospects.

The investor mix also reveals the scale of interest in OpenAI’s growth. Thrive Capital, SoftBank, Dragoneer Investment Group, Abu Dhabi’s MGX, and T. Rowe Price all bought into the round. SoftBank had already backed OpenAI in its $40 billion primary funding earlier this year, making this a reinforcement of its position.

Financially, the company is growing at a speed that few in Silicon Valley have matched. In the first half of 2025, OpenAI generated about $4.3 billion in revenue, already 16% higher than its full-year revenue for 2024. 

That growth has pushed the company into a league where it stands at the forefront of artificial intelligence and also sits at the centre of the global technology economy.

Alongside the capital raise, OpenAI is also exploring structural changes. Reports reveal the company is in talks with Microsoft to transition into a public benefit corporation. If completed, OpenAI’s nonprofit board would retain governance power, while its commercial arm would continue expanding at scale.

The timing of the share sale shows high competition for talent across the sector. Meta has gone as far as offering nine-figure compensation packages and recently hired Alexandr Wang, the 28-year-old co-founder of Scale AI, to head its new superintelligence unit.

For OpenAI, the secondary sale does more than unlock employee liquidity. It functions as a retention strategy, a way to keep top engineers and researchers from defecting to rivals. Other high-value private companies such as Stripe, Databricks, and SpaceX have adopted similar tactics.

With this new valuation, Analysts say OpenAI has shown it can translate massive infrastructure and talent into recurring revenue streams. Billions already flow in and product adoption is growing continuously, hence, OpenAI now looks less like a risky investment and more like an indispensable pillar of the modern technology economy.