Tesla boss Elon Musk has become the first person ever to achieve a net worth of more than $500 billion (£370.9 billion), as the value of the electric car company and his other businesses have risen this year.

The tech magnate's net worth briefly reached $500.1 billion on Wednesday afternoon New York time, before dipping slightly to just over $499 billion later in the day, as reported by the Forbes billionaires index.

Alongside Tesla, valuations of his other ventures, including the artificial intelligence start-up xAI and rocket company SpaceX, have also reportedly climbed in recent months.

This milestone further cements Musk's status as the world's richest person, well ahead of rivals in the global tech sector.

According to Forbes' billionaires index, Oracle founder Larry Ellison is the world's second richest person, with a fortune of about $350.7 billion. Mr. Ellison briefly overtook Musk last month after shares in Oracle soared by more than 40%, boosted by the firm's surprisingly rosy outlook for its cloud infrastructure business and artificial intelligence (AI) deals.

Musk's huge wealth is closely tied to his more than 12% stake in Tesla, which has seen its shares rise sharply this year, with the company's stock recording over a 20% increase this year alone.

Investors have responded positively to Musk's increased focus on his companies rather than political undertakings earlier this year.

Robyn Denholm, chair of Tesla's board, noted in September that Musk was now 'front and centre' at the carmaker, emphasizing his key role in steering the company through challenges including increased competition and its ongoing transition into AI and robotics.

In light of his growing wealth, Musk stands to receive a pay package worth over $1 trillion if he meets ambitious targets set for the coming decade, including significant increases in Tesla’s market value and production goals.

With this achievement, Elon Musk not only marks a historical financial milestone but also highlights the transformative influence of technology and innovation in today's economy.