SpaceX Overtakes Amazon as Fifth-Largest U.S. Company Following Record IPO

SpaceX has officially eclipsed Amazon to become the fifth-largest publicly traded company in the United States, capping off a historic initial public offering that has rapidly reshaped the upper echelons of the stock market. In early Tuesday trading, shares of the aerospace and artificial intelligence conglomerate surged past $211, pushing its implied market capitalization to roughly $2.84 trillion and edging out the e-commerce giant's $2.66 trillion valuation.[1][2]

The milestone comes just four days after SpaceX executed the largest public market debut in history. Initially pricing its shares at $135 to raise $75 billion, the company saw overwhelming global demand that prompted underwriters to exercise their greenshoe option in full, bringing the total capital raised to a staggering $85.7 billion.[4][6]

The stock's ascent has been nothing short of meteoric. After jumping 19% on its first day of trading to close near $161, the rally continued unabated through Monday and into Tuesday's pre-market session. The surge has been fueled by a potent combination of intense retail investor enthusiasm, forced passive buying from index-tracking funds, and an extremely limited supply of available shares.[1][3]

Scarcity is playing a central role in the stock's rapid appreciation. SpaceX floated less than 5% of its total outstanding shares during the IPO, creating a massive supply-demand mismatch. With such a thin free float, the heavy influx of retail buy orders—which accounted for more than half of all U.S. retail trading on the day of the debut—has driven the price up at an unprecedented clip.[1][5]

The trading volume itself has been historic. On Tuesday morning, more than $1.16 billion worth of SpaceX shares exchanged hands before the opening bell, a figure that eclipsed the combined pre-market trading volumes of tech heavyweights Nvidia, Microsoft, Tesla, and Apple. This level of liquidity for a newly listed company underscores the market's voracious appetite for exposure to the commercial space economy.[2][5]

Beyond rockets and satellite internet, investors are heavily pricing in SpaceX's expanding footprint in artificial intelligence. Following its February 2026 acquisition of Elon Musk's AI startup xAI, the company absorbed the Grok large language model and a massive wholesale AI compute business. This pivot has positioned SpaceX not just as an aerospace contractor, but as a foundational infrastructure provider for the next generation of orbital data centers and AI development.[4][6]

The IPO's success has also triggered a massive wealth generation event. The soaring valuation officially minted CEO Elon Musk as the world's first trillionaire, given his roughly 50% stake in the company. Furthermore, the public listing has turned thousands of current and former SpaceX employees into millionaires, unlocking vast amounts of equity that had been tied up during the company's two decades as a private entity.[3][6]

Despite the market euphoria, some analysts point to the company's ambitious cash burn. SpaceX remains unprofitable, having lost $4.9 billion in 2025 as it heavily reinvests in Starship development, Starlink expansion, and its new AI data centers. At its current spending pace, the record-breaking $85.7 billion raised could be deployed within a few years, though supporters argue the capital is necessary to capture an estimated $28.5 trillion total addressable market across the space and AI sectors.[6]

Looking ahead, the stock's trajectory will likely face its next major test as lock-up periods expire. The first wave of insider shares—representing about 20% of the company's equity—will become eligible for sale in mid-August, followed by rolling releases through the fall. Until then, with its fast-tracked inclusion into major indices like the Nasdaq 100 on the horizon, SpaceX's tight float and high demand are expected to keep the stock highly dynamic as it cements its new position among the world's most valuable corporations.[1][5]