SpaceX becomes world’s fifth-largest company, holds 18,712 Bitcoin worth over $1B

SpaceX didn’t just go public. It went public holding a mountain of Bitcoin that nobody saw coming.

The company’s S-1 filing with the SEC disclosed 18,712 BTC on its balance sheet as of March 31, 2026, valued at $1.29 billion. The cost basis was $661 million, meaning the company is sitting on roughly a 95% unrealized gain on its digital asset position. That makes SpaceX the eighth-largest public corporate holder of Bitcoin.

The IPO that rewrote the record books

SpaceX completed its IPO on June 12, 2026, raising approximately $75 billion at $135 per share. The offering pushed the company’s market capitalization above $2 trillion, slotting it among the top handful of publicly traded companies on the planet.

Analysts had previously estimated SpaceX held around 8,300 BTC. The actual figure of 18,712 BTC is more than double that estimate.

The filing also showed that SpaceX’s Bitcoin holdings remained unchanged between at least December 31, 2025, and March 31, 2026. SpaceX wasn’t trading in and out of positions. It bought its Bitcoin and held it, which aligns more with a strategic treasury allocation than speculative trading.

What the numbers actually mean

At a $661 million cost basis across 18,712 BTC, SpaceX’s average purchase price works out to roughly $35,300 per coin. Since the March 31 valuation date, Bitcoin’s price movements suggest the fair value of SpaceX’s holdings may have increased to around $1.45 billion.

What this means for investors

SpaceX’s IPO coincided with a broader market rotation away from risk assets. When $75 billion flows into a single equity offering, that capital comes from somewhere. Some of it likely would have otherwise found its way into crypto markets, creating potential short-term pressure on Bitcoin and other digital assets.

The fact that analyst estimates were off by more than 100% raises an interesting question: how many other large private companies are holding Bitcoin that nobody knows about? SpaceX was private when it accumulated its position, and the market had no way to force disclosure. The S-1 was the first real window into its treasury.

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