Elon Musk’s SpaceX began its first day as a public company on Wall Street Friday after the biggest initial public offering (IPO) in history with the polarising entrepreneur promising he will take humanity to Mars.

“SpaceX wants to be able to take you to the moon, take you to Mars, and ultimately beyond,” Mr Musk said at a launch event in Starbase, Texas.

“Not just a few astronauts, I mean literally you.”

Mr Musk is expected to become the world’s first trillionaire following SpaceX’s long-awaited Nasdaq debut.

The rocket startup, founded in 2022, has expanded into a major satellite operator and has also folded in Mr Musk’s artificial intelligence company xAI, which includes the social media platform X.

“It is certainly hard to believe that a little company that started in a warehouse in El Segundo is now going public with the largest IPO ever,” Mr Musk said.

“If people had told me this was going to happen I was like ‘man you must be smoking some really good crack’ because I think this company’s going to fail.”

An image of Elon Musk on the New York Stock Exchange tower

Elon Musk’s SpaceX has listed on the US stock exchange 

About 100 people assembled outside the Nasdaq exchange’s home in New York, where SpaceX also marked the occasion with a neon sign in Times Square reading “Building the infrastructure to the future”.

Exchanges, market makers and underwriters had been bracing for extraordinary order volumes after the company sold $75 billion ($106.5 billion) in shares.

If SpaceX shares hold at their offering price, the company’s market value would be $US1.77 trillion ($2.4 trillion).

That would put SpaceX in the top 10 of Wall Street’s biggest companies, close to Broadcom and Meta Platforms.

But for SpaceX to reach its goal “to make life multi-planetary”, it needs billions more than it currently takes in from its rocket and satellite business. 

Between the start of 2025 and March 31, 2026, the company lost $8.7 billion ($12.4 billion).

A group of people clap and raise their arms with SpaceX branding behind them.

SpaceX president Gwynne Shotwell celebrates with colleagues during a bell ringing ceremony at the Nasdaq MarketSite in New York. (AP: Frank Franklin II)

Shares will likely not trade until the middle of the trading day, under the ticker symbol SPCX, and will be a test of whether unprecedented investor demand can translate into a blockbuster opening for the world’s biggest IPO. 

SpaceX is the first of three large artificial intelligence companies expected to start selling their shares on the US market with OpenAI and Anthropic recently filing initial documents with regulators.

But not all investors are thrilled about SpaceX potentially showing up in their holdings of index funds. 

Officials from pension funds for firefighters, teachers and other workers in California and New York sent a letter to SpaceX last month decrying some of the provisions in its IPO, including the “super voting shares”, mandatory arbitration of shareholder claims instead of the possibility of lawsuits and how much power Mr Musk will hold over the company.

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Elon Musk ltook up a role in the Trump administration last year.

Oxfam America said that if Mr Musk became the world’s first trillionaire he would be richer than the poorest 46 per cent of the world population, or 3.8 billion people, combined. 

Nabil Ahmed, Oxfam America’s senior director of economic justice, called it a “dark day for democracy” earlier this week.

“Musk will be a government-backed trillionaire whose fortune was fuelled by an era of regressive public policy choices — decisions rigged by a tiny few to fuel their fortunes, and overwhelmingly supported by political leaders,” he said.

Mr Musk was appointed to the Trump administration last year as a “special government employee” and accompanied the US president on his state visit to China last month.