SpaceX Just Became the Biggest IPO in History. Here Is What Actually Happened
1. Key Themes
Theme 1: SpaceX's IPO Is the Largest in History — By a Wide Margin
SpaceX's debut shattered prior IPO records, raising nearly three times what the previous record-holder did.
"The company raised $75 billion selling more than 555 million shares at its offer price of $135, making it the biggest IPO in history. More than triple the size of Alibaba, which held the previous US record."
Theme 2: Passive Index Inclusion Creates Structural Buying Pressure
MSCI's early-inclusion methodology triggered near-immediate mandatory buying from passive funds into a market with almost no available float — a technically explosive setup.
"It is estimated that $15 to $20 trillion of passive funds have to buy SPCX to adjust to the new index weights, with only a 4% float available. That structural buy pressure with almost no shares available is the setup heading into next week."
Theme 3: A $2 Trillion Market Cap vs. a $63 Analyst Fair Value
The gap between market enthusiasm and fundamental valuation analysis is extreme and unresolved — with the full picture locked behind a paywall.
"$135 IPO price. $150 opening. $176 intraday high. $161 close. $2 trillion market cap on day one. And Morningstar says it is worth $63."
Theme 4: SpaceX's Path to Public Markets Signals a New Era for Mega-Private-Company IPOs
A company that Musk publicly doubted would survive at all is now one of the ten largest listed companies in the world on its first day.
"SpaceX stock, listed under SPCX, rose 19% on its first day of trading to close at $160.95, becoming one of the world's biggest listed companies on its first day on the market, valued above $2 trillion."
2. Contrarian Perspectives
Morningstar's $63 Fair Value vs. $161 Close — A 60%+ Overvaluation Claim While the market celebrated a historic debut, Morningstar's analysts put fair value at less than half the IPO price — implying the market is paying a nearly 155% premium over what fundamental analysis supports. The article teases, but does not fully reveal, SpaceX's "actual revenue, losses, and what the business really generates," suggesting the S-1 may contain sobering financials beneath the hype.
"Morningstar says it is worth $63... SpaceX's actual revenue, losses, and what the business really generates... The honest valuation debate: $2 trillion or $63?"
Musk's Own 90%+ Failure Probability Assessment Even the founder assigned near-certain odds of failure to the company now worth over $2 trillion — a reminder that founder conviction and probabilistic realism can coexist, and that outcome survivorship distorts how we evaluate founding decisions in hindsight.
"'I gave SpaceX a less than 10% chance of succeeding at all,' he said. 'Let me tell you, if people had told me this was gonna happen, I was like, man, you must be smoking some really good crack, because I think this company's gonna fail.'"
Passive Funds as Price Amplifiers, Not Price Discoverers The near-term price action following the IPO has less to do with SpaceX's business fundamentals and more to do with index rebalancing mechanics — a structural dynamic that could mislead retail investors into treating price momentum as a fundamental signal.
"$15 to $20 trillion of passive funds have to buy SPCX to adjust to the new index weights, with only a 4% float available."
3. Companies Identified
| Company | Description | Why Mentioned | Quote |
|---|---|---|---|
| SpaceX (SPCX) | Aerospace and space transport company founded by Elon Musk | Subject of the article; executed the largest IPO in US history | "The company raised $75 billion selling more than 555 million shares at its offer price of $135, making it the biggest IPO in history." |
| Alibaba | Chinese e-commerce and tech conglomerate | Prior holder of the largest US IPO record | "More than triple the size of Alibaba, which held the previous US record." |
| Morningstar | Investment research and financial services firm | Issued a sharply contrarian fair-value estimate of $63/share | "Morningstar says it is worth $63." |
| MSCI | Global index provider (MSCI World, MSCI ACWI) | Its early-inclusion methodology for SPCX is driving mandatory passive fund buying | "MSCI's early-inclusion methodology for SPCX kicked in on June 13, one day after listing." |
| Anthropic | AI safety company | Mentioned in relation to a compute deal referenced in SpaceX's S-1 teardown | "Three-segment financial breakdown, Anthropic compute deal, Cursor option, TAM analysis, and pricing framework." |
| xAI | Elon Musk's AI company | A Series E announcement is referenced among primary source documents | "The primary source S-1 documents, the SEC filings, the court exhibits, and the xAI Series E announcement." |
4. People Identified
| Person | Description | Why Mentioned | Quote |
|---|---|---|---|
| Gwynne Shotwell | President and COO of SpaceX | Rang the Nasdaq opening bell on IPO day | "Yesterday, Gwynne Shotwell rang the opening bell at the Nasdaq." |
| Elon Musk | CEO and founder of SpaceX | Spoke at IPO, his net worth exceeded $1 trillion post-listing | "Elon Musk's net worth after day one: over $1 Trillion." |
| Ruben Dominguez | Author, The VC Corner newsletter | Wrote the analysis | Byline credit |
5. Operating Insights
Float Management Is a Lever That Shapes Post-IPO Price Action SpaceX's 4% float — an extraordinarily small percentage for a company of this scale — combined with MSCI index inclusion created a near-mechanical squeeze. For founders and CFOs planning liquidity events, controlling the float is not just a financial decision; it is a price-action strategy.
"Only a 4% float available. That structural buy pressure with almost no shares available is the setup heading into next week."
Founder Narrative at IPO Is a Strategic Asset Musk's self-deprecating, almost reckless honesty about his prior failure expectations created authentic crowd energy. For founders preparing for public market debuts, vulnerability paired with demonstrated results can be more compelling than polished optimism.
"I gave SpaceX a less than 10% chance of succeeding at all... I think this company's gonna fail. The crowd loved it."
6. Overlooked Insights
The Cursor Option in SpaceX's S-1 Buried in the newsletter's reference to its prior S-1 teardown is a mention of a "Cursor option" — suggesting SpaceX may hold some form of option or relationship with Cursor (the AI coding tool), which would be a notable and largely undiscussed cross-sector strategic asset.
"Three-segment financial breakdown, Anthropic compute deal, Cursor option, TAM analysis, and pricing framework."
First Public Earnings Won't Come Until November 2026 Investors buying SPCX today will have no public financial reporting for approximately five months — an unusually long window of opacity for a $2 trillion public company, creating significant information asymmetry between insiders and public market participants.
"What to watch before the first public earnings report in November 2026."