SpaceX has already received orders for more than the shares available in its $75 billion initial public offering, according to people familiar with the matter, putting the company on the verge of setting the record for the biggest-ever listing.The IPO for Elon Musk’s rocket, satellite and artificial intelligence company is oversubscribed after one-on-one meetings between the company and institutional investors, one of the people said, asking not to be identified as the information isn’t public. The Starbase, Texas-based company is offering about 555.6 million shares at $135 each in a deal that could value it at roughly $1.8 trillion.SpaceX is set to deliver the biggest ever IPO, more than doubling the size of Saudi Aramco’s $29.4 billion listing in 2019. In a fixed-price offering, receiving more orders than there are shares available typically indicates that there’s enough demand for the company to raise the entire amount it’s seeking.The deal is expected to price June 11 and begin trading the following day, and remains very early in the marketing process, the people said. Deliberations are ongoing and details could change, the people said. A spokesperson for SpaceX didn’t immediately respond to a request for comment.Read More: Musk Leaves Investors Starstruck at Dimon’s SpaceX ExtravaganzaMusk’s decision to offer shares at a fixed price ahead of the order-taking is almost unheard of for sizable US IPOs, unlike in Europe and Asia. Most companies typically announce a price range before marketing shares during investor presentations, with only a handful of tiny firms skipping the opportunity to gauge demand, and potentially build excitement by pricing at the top or above.SpaceX and other potential mega-IPOs this year could see significant buying from index-tracking investors soon after they go public. Nasdaq Inc. changed its rules recently so SpaceX can join the Nasdaq 100 Index, a cohort of the largest non-financial companies listed on its exchange, in just 15 trading days, down from a three-month minimum. FTSE Russell adopted a similar approach, shortening the waiting time to five trading days.S&P Dow Jones Indices declined to follow other index firms, however, and will keep its existing eligibility requirements for benchmarks including the S&P 500, closing the door to fast entry for big tech IPOs.Goldman Sachs Group Inc., Morgan Stanley, Bank of America Corp., Citigroup Inc. and JPMorgan Chase & Co. are leading the deal, with 18 other banks participating. The company formally known as Space Exploration Technologies Corp. expects to make its debut on Nasdaq and Nasdaq Texas under the symbol SPCX.