How Much Bitcoin Does Tesla & SpaceX Hold?

Tesla holds 11,509 Bitcoin and SpaceX holds 18,712 Bitcoin, based on each company's most recent regulatory filings as of March 31, 2026. Together that is 30,221 $BTC across Elon Musk's (@elonmusk) two best known companies, worth a little over $2.2 billion at recent prices. The figures matter because corporate Bitcoin holdings only become public through filings, and both numbers were just confirmed in black and white. For SpaceX, the confirmation came with a surprise. The number is more than double what on-chain trackers had guessed.

Why Did SpaceX's Bitcoin Stash Shock the Market?

SpaceX (@SpaceX) disclosed its 18,712 BTC in the Form S-1 it filed with the SEC on May 20, 2026, ahead of a planned public listing. Until then, public trackers such as BitcoinTreasuries and Arkham had pegged the company at around 8,285 BTC. The filing revealed roughly 10,400 more coins than anyone outside the company could see.

The S-1 puts the cost basis at $661 million, which works out to an average purchase price near $35,320 per coin. SpaceX carried the position at a fair value of $1.29 billion as of March 31, 2026, and about $1.64 billion at the end of 2025. At recent prices near $74,000, the stash is worth close to $1.4 billion.

SpaceX has applied to list on Nasdaq under the ticker SPCX, with the offering expected in June 2026. It started buying Bitcoin in early 2021, around the same time Tesla made its first purchase.

How Much Has Tesla Held, and Has It Changed?

Tesla's (@Tesla) 11,509 BTC has not changed in over a year. Both the quantity and the $386 million cost basis have carried over unchanged from one quarterly report to the next. In its Q1 2026 10-Q, Tesla marked the holding at a fair value of $786 million as of March 31, 2026, down from just over $1 billion three months earlier. At recent prices the position is worth roughly $850 million.

This is what is left after a well documented retreat. Tesla bought about $1.5 billion in Bitcoin in early 2021, then sold close to 75% of it in the second quarter of 2022. The remaining coins have sat untouched through several sharp drawdowns. Despite years of speculation that Tesla would dump the rest during downturns, it has not.

How Do the Two Compare?

Here is how they line up as of late May 2026:

• SpaceX: 18,712 BTC, cost basis $661 million, disclosed in its May 2026 S-1, position last valued at $1.29 billion on March 31.
• Tesla: 11,509 BTC, cost basis $386 million, reported in its Q1 2026 10-Q, valued at $786 million on March 31.

SpaceX now holds about 7,200 more Bitcoin than Tesla, making it Musk's largest corporate Bitcoin holder by a clear margin.

One point worth correcting before it spreads: SpaceX would not be the largest corporate Bitcoin holder in the world. By coin count, that title belongs to Strategy, which held 843,738 BTC as of late May 2026. SpaceX would rank around seventh or eighth among public companies once it lists, ahead of holders like Coinbase but far behind @Strategy.

There is a version of the bigger claim that does hold up. Grayscale splits public Bitcoin holders into two groups. Pure treasury firms like Strategy exist primarily to provide investors with Bitcoin exposure, and their coins make up most of their value. Diversified businesses like SpaceX and Tesla hold Bitcoin next to a core business that has nothing to do with crypto, rockets in one case and cars in the other. By Grayscale's read, a listed SpaceX would be the most valuable public company holding any Bitcoin, simply because of its size. Its 18,712 BTC is worth about $1.4 billion, but that is only around 0.1% of the $1.75 trillion-plus valuation it is targeting at its IPO. For Strategy, Bitcoin is close to 80% of the company. For SpaceX it is a small hedge, not the main story.

Could a Tesla-SpaceX Merger Combine the Stacks?

Musk has discussed folding the two companies together with colleagues, per CNBC, and the talk grew louder as SpaceX neared its listing. Early SpaceX investor Peter Diamandis called a tie-up "only a matter of when" in a Bloomberg interview, and Wedbush analyst Dan Ives puts the odds near 80% to 90% by early 2027. Prediction markets are cooler, with Kalshi traders pricing a merger before May 2027 at about 33%.

If it ever happens, the two Bitcoin positions would land under one company, for a combined 30,221 BTC. That would not move the ranking much. The merged business would still trail Strategy by a wide margin. It would, however, put all of Musk's corporate Bitcoin inside a single public vehicle worth more than $3 trillion on paper.

What Happens After the IPO?

The question now is what SpaceX will do with the coins once it answers to public shareholders. Tesla's record offers one template: buy, hold, and ride out the volatility. Whether SpaceX will follow the same path remains unknown, and the S-1 does not commit the company to either course.

Both figures reflect March 31, 2026, and neither updates until the next round of filings. Tesla's next quarterly report is due in late July. SpaceX's holdings become a tracked line item the moment it starts trading, turning a long-running guessing game into a number anyone can check.

Sources:

• U.S. Securities and Exchange Commission Space Exploration Technologies Corp. Form S-1, filed May 20, 2026, disclosing 18,712 BTC and a $661 million cost basis.
• BitcoinTreasuries Reporting on the S-1 disclosure, Tesla's 11,509 BTC, and where SpaceX would rank among public corporate holders.
• CoinMarketCap Details on the roughly $35,320 average acquisition price and the gap against prior on-chain estimates.
• Bitcoin.com News Grayscale Research's breakdown of treasury firms versus diversified holders, and why SpaceX would be the most valuable public company holding Bitcoin despite ranking far behind Strategy by coin count.
• CNBC Report that Musk has discussed combining SpaceX and Tesla, plus the open questions around parentage and pricing.
• Bloomberg Early investor Peter Diamandis on why he sees a merger as a matter of timing, not if.