Guy Fawkes 
SpaceX filed a Form 8-K with the US Securities and Exchange Commission (SEC) on June 15, 2026, days after closing one of the largest US IPOs in recent memory, and the document confirms what the earlier S-1 registration statement had already flagged: 18,712 BTC remains parked on the company’s balance sheet, untouched through multiple market cycles.
The Bitcoin treasury position carries a cost basis of approximately $661M (roughly $35,300 per coin) and was marked at a fair value of $1.293Bn as of March 31, 2026, according to the filing. At current prices, that figure sits closer to $1.45Bn.
This SpaceX news dropped as Bitcoin retraced by -2.5% overnight, slipping to $65,000 after a strong start to the week that saw it spike above $67,000, leaving investors wondering whether $70,000 was on the way.
$BTC failed to reclaim the $67,000-$68,000 zone.
Now, the key level to hold is $64,000-$65,000.
If Bitcoin loses this, it’ll end up giving most of its short-term gain back. pic.twitter.com/uI6P5k8oyD
— Ted (@TedPillows) June 17, 2026
What the SpaceX IPO Numbers Actually Say
The SPCX IPO priced 638.9 million Class A shares at $135 each, including full exercise of underwriters’ option for an additional 83.3 million shares.
The stock opened at $150 on its Nasdaq debut and closed the first session at $160.95, a 19% gain from the IPO price, after touching an intraday high of $176.52.
The June 15 Form 8-K (a current report that discloses material corporate events to shareholders) outlines how SpaceX intends to deploy those proceeds.
According to the filing, the company will direct capital toward expansion of AI compute infrastructure, enhancements to launch infrastructure and launch vehicles, and increases in the scale and capacity of its satellite constellations, with any remainder allocated to general corporate purposes.
SpaceX $SPCX is following the Tesla $TSLA route.
An initial pump of 60%-70% followed by a brutal 50% crash. https://t.co/DKp0ayaLTd pic.twitter.com/83KGogVdEW
— Ted (@TedPillows) June 16, 2026
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The Bitcoin Treasury Angle Investors Shouldn’t Miss
SpaceX first accumulated Bitcoin in 2021 and has neither added to nor sold from its position since, holding flat through the 2022 bear market, the 2024 halving cycle, and now its own IPO. The BTC balance sheet entry sits alongside Tesla’s 11,509 BTC, meaning Elon Musk-linked entities collectively control approximately 30,221 BTC worth roughly $2.2Bn.
That ranking places SpaceX among the top corporate Bitcoin holders globally. Mara Holdings now holds 36,303 BTC, sitting ahead of SpaceX on the corporate accumulation leaderboard, while SpaceX itself ranks seventh among tracked corporate treasuries – ahead of Coinbase.
There is one structural change that matters going forward. Under 2024 GAAP accounting rule updates, Bitcoin held as an asset must now be marked to market each reporting period.
That means BTC price swings will flow directly into SpaceX’s profit-and-loss statement and equity, giving SPCX stock partial characteristics of a Bitcoin ETF, without being one. A $10,000 move in BTC price translates to roughly $187M in unrealized gain or loss on SpaceX’s books.
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On-Chain Analytics Missed Half the Picture
Before the S-1 filing, on-chain analytics firm Arkham had attributed roughly 8,280 BTC to SpaceX wallet addresses, less than half the disclosed 18,712 BTC.
The gap exists because SpaceX holds its Bitcoin through third-party custodial arrangements, in which the coins sit in omnibus wallets that are not directly traceable to a single corporate entity on-chain.
The takeaway for investors tracking corporate Bitcoin holdings: SEC filings remain the authoritative source. Chain analysis, however sophisticated, cannot fully account for custodial positions held off-exchange or in institutional custody structures. The SpaceX disclosure is a clean example of why the two data sources require careful reconciliation.
The 8-K also details governance mechanics relevant to SPCX shareholders. More than 103 million Series Preferred Stock shares converted into Class A or Class B common stock at IPO close.
Class B shares carry 10 votes each versus one vote for Class A, preserving outsized voting control for Elon Musk after the listing. The amended 2024 Equity Incentive Plan has 300,894,150 Class A shares available for employee awards, with a separate stock purchase plan carrying an additional 24,026,920 shares.
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The post SpaceX SEC Filing: 18,712 BTC Still on Balance Sheet Post-IPO appeared first on 99Bitcoins.
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