SpaceX’s IPO has grown larger three days after pricing. Underwriters led by Goldman Sachs and Morgan Stanley exercised the overallotment option, known as the greenshoe, on Monday, adding 83.3 million shares and pushing total proceeds to approximately $85.7 billion from the initial $75 billion. The greenshoe is significant as both a market mechanics signal and a commercial milestone – underwriters exercise the overallotment when a stock rises after debut, which means Goldman and Morgan Stanley made the call to use it after watching SPCX close its first trading day at $161.11, a 19% gain from the $135 IPO price, and continue climbing another 7% or more in Monday’s early session. The specific sequence of events, from the Friday pricing through the floor traders in green shoes to Monday’s overallotment activation, is what NewsTrackerToday clocks the greenshoe as: not just a routine IPO mechanism but a live demonstration that institutional demand for SPCX exceeded even the book-building process’s capacity to absorb it.
The greenshoe mechanism itself is standard in large IPOs. Underwriters oversell shares during the offering, creating a short position. If the stock rises, they cover that short by activating the overallotment option, buying additional shares from the company at the IPO price and delivering them to investors who received the oversold allocation. If the stock falls, they buy shares in the market instead, supporting the price. In SpaceX’s case, the stock rose rather than fell, activating the greenshoe and delivering an additional $10.7 billion to SpaceX. The greenshoe, at $10.7 billion, represents one of the largest overallotment exercises in the history of technology IPOs. Goldman Sachs led the IPO. Morgan Stanley is leading the stabilization process. SpaceX staff wore green shoes on the trading floor Friday as a deliberate nod to the mechanism, and Musk shared the photo with approving commentary.
Liam Anderson on the first trading week: “Priced at $135. Closed day one at $161. Monday morning, plus-7% before the greenshoe was exercised. Valuation crossed $2 trillion on debut. $85.7 billion total raised. The week that SpaceX went public will show up in IPO textbooks.” The $2 trillion valuation that SPCX crossed on its debut day places it among a very small number of publicly traded companies globally, and above the market capitalizations of companies that have been public for decades. What this means for Musk’s net worth, which already crossed $1 trillion at the IPO price given his stake size, is that the first week’s trading has extended that lead further – an outcome that the greenshoe’s activation makes concrete, and that NewsTrackerToday steps back from the headline to frame as a structural market question: a stock that rises 19% on debut and continues climbing on day two is either repricing correctly toward a valuation the IPO price understated, or it is running ahead of what the underlying business justifies.
Isabella Moretti examines the post-IPO commercial context: “$85.7 billion raised from an offering that represents roughly 5% of outstanding shares. That means the remaining 95% of SpaceX equity is held by Musk, early investors, and employees. The lock-up periods on those shares, and when they expire, will be the most significant near-term supply event for SPCX. The stock is currently trading in a window where institutional demand from investors who couldn’t get allocations in the IPO is still meeting a restricted float. The real test of valuation is what happens when lock-ups begin to expire and the holders who have been waiting for this liquidity event start making decisions about whether $161-plus adequately reflects the company’s fundamentals.”
The enterprise AI market sizing in SpaceX’s S-1 – which described a $22.7 trillion total addressable market in enterprise applications where SpaceX currently has, per IDC analyst Arnal Dayaratna, essentially no commercial presence – remains the most analytically vulnerable part of the investment thesis. The Morningstar fair value estimate of $63 per share against the $135 IPO price created a call option framing: you pay $63 for what SpaceX already is and $72 for what Musk says it will become. At $161-plus in early Monday trading, the market is pricing the call option at a higher level still. Whether the orbital data center, Terafab chip foundry, and enterprise AI ambitions can be executed concurrently while Starship completes its development cycle is the engineering question that Monday’s post-IPO enthusiasm does not answer, and that is what News Tracker Today traces in the post-IPO trading: the stock is running ahead of the execution timeline.
The most credible near-term projection is that SPCX holds above the IPO price through the lock-up period, driven by the retail distribution strategy that the IPO’s wealth management events designed for exactly this outcome: sticky, long-horizon holders who do not immediately seek to exit. The first real inflection point comes when early employee lock-ups expire and the supply picture changes. Beyond that, the company needs to report at least one strong quarterly earnings cycle as a public company before the valuation debate between the Morningstar $63 fair value and the market’s current price is meaningfully resolved. The quarterly earnings call after SpaceX’s first full reporting period as a public company is what NewsTrackerToday names the first question for: it will be the first time the company must translate its ambitions into GAAP numbers on a publicly accountable schedule.
