SpaceX Discloses 18,712 BTC Stake, Ranks as 8th-Largest Public Corporate Bitcoin Holder
SpaceX's newly filed S-1 with the U.S. Securities and Exchange Commission shows the company holds 18,712 bitcoin, valued at about $1.2 billion based on a BTC price near $63,000. The disclosure places the aerospace group among the largest public-company bitcoin holders, ranking eighth.
The holding size surprised the market. Arkham Intelligence, which tracks on-chain activity, had previously estimated SpaceX's bitcoin position at 8,285 BTC. The S-1 figure is more than double that estimate.
SpaceX reported an aggregate cost basis of roughly $661 million for the position, implying an average purchase price near $35,000 per bitcoin. With BTC trading around $63,000, the unrealized gain is approximately $540 million.
For comparison, Tesla, also led by Elon Musk, holds 11,509 BTC. Taken together, the two companies account for more than 30,000 BTC under Musk's oversight.
SpaceX's IPO sought a valuation of about $1.75 trillion, positioning it among the largest public offerings on record. Shares rose more than 20% after the debut.
Beyond the headline number, the filing is notable because it represents the largest bitcoin position ever disclosed in connection with an IPO, giving public-market investors another avenue for indirect exposure to bitcoin through a company that also leads the commercial space-launch market. Grayscale's pre-IPO analysis had highlighted SpaceX as a candidate to become the largest diversified public company holding bitcoin by value.
SpaceX has not reported any major bitcoin purchases or sales since the IPO launched on June 12, 2026.
The discrepancy between on-chain estimates and the filed figure underscores a limitation of wallet-mapping analytics: companies can custody bitcoin in ways that do not produce clear on-chain attribution, suggesting corporate holdings may be higher than public trackers indicate.
For shareholders, the bitcoin stake is now embedded in the equity story. The result is a blended risk profile: exposure to aerospace and defense operations alongside crypto-linked balance-sheet sensitivity. A BTC rally would lift the company's balance sheet, while a sharp drawdown would weigh on shareholders in parallel with core business performance.
Investors may also watch concentration risk. Musk influences bitcoin treasury decisions at both Tesla and SpaceX, so a change in his stance or heightened regulatory pressure on either company could affect both positions at the same time.
