Private Market Update April 2026
As SpaceX sets sights on largest-ever IPO, market weighs what it will take to succeed
The story of the quarter arrived the day after it ended. On April 1, SpaceX confidentially filed for an initial public offering, setting the stage for what could become the largest IPO in history.1 Yet the filing itself was less a surprise than a punctuation mark. SpaceX had already dominated private market discourse for months, long before its move toward the public market became official. Rather than introduce a new narrative, the filing sharpened a single question: what will it take for SpaceX to succeed as a public company?
By the time the filing became public, much of the economic groundwork had already been laid. In December 2025, an internal tender offer valued SpaceX at roughly $800 billion and Elon Musk confirmed plans to pursue a public listing in 2026.2,3 Weeks later, SpaceX merged with xAI in an all-stock transaction valuing the combined entity near $1.25 trillion - the largest corporate merger on record.4 That deal expanded the scope of the offering, positioning SpaceX not simply as a space and communications company, but as a broader platform spanning launch infrastructure, global connectivity and frontier AI.
The confidential filing made those ambitions explicit and raised the scale of the debate. Reports now point to a June IPO at a valuation approaching $1.75 trillion, with as much as $75 billion in capital raised.5 At that size, SpaceX would debut among the ten largest U.S.-listed companies by market capitalization, immediately relevant to benchmark-driven institutional portfolios across asset classes.
| Ticker | Market Capitalization ($M) |
| NVDA | 4,237,920 |
| AAPL | 3,725,927 |
| GOOGL | 3,478,613 |
| MSFT | 2,748,745 |
| AMZN | 2,235,762 |
| TSM | 1,752,779 |
| SpaceX | 1,750,000 |
| AVGO | 1,465,427 |
| META | 1,447,235 |
| TSLA | 1,394,967 |
Quandl data as of 03/31/2026
The headline number naturally raises the question of market absorption. A $75 billion raise would more than double the previous global record set by Saudi Aramco’s $29.4 billion IPO in 20196 and would dwarf the largest U.S. offering to date, Alibaba’s $25 billion debut in 2014.7 Yet history suggests that size alone rarely determines outcomes. Aramco demonstrated that even unprecedented issuance can clear when pricing, float and investor expectations are carefully managed. Alibaba showed how global demand and index relevance can support unusually large debuts. By contrast, Uber’s far smaller 2019 IPO struggled on its first day as valuation, timing and narrative misaligned.8 The lesson across cycles is consistent: the public market has depth, but success depends on structure, framing and credibility.
For SpaceX, then, the central issue is not whether markets can technically absorb the deal, but whether the offering is structured to sustain confidence beyond the first trade.
Those conditions hinge primarily on clarity and capital discipline. SpaceX comes to market with multiple businesses at different stages of maturity, but with a profile that increasingly resembles how public investors evaluate diversified platforms.9 Launch services remain capital-intensive but strategically dominant. Starlink has emerged as the economic core: a global broadband network with recurring revenues, expanding scale and a clearer path toward margin expansion. Alongside them sits xAI, a long-duration growth investment that extends SpaceX’s strategic ambition beyond space infrastructure alone.
Framed correctly, this breadth is a strength rather than a liability. The xAI merger helped justify trillion-dollar private valuations and positioned SpaceX as the first venture-backed company to operate credibly at that scale.10 For public investors, the task is not to underwrite a single monolithic bet, but to understand how nearer-term, cash-generating businesses support longer-dated optionality. The IPO’s success will hinge on SpaceX’s ability to articulate that balance clearly – through disclosure, segmentation and disciplined capital allocation – well beyond debut day.11
Paradoxically, SpaceX’s most compelling public market attribute may be its lack of direct comparables. It would become the first segment defining space infrastructure company available to public investors. Neither global launch services nor low Earth orbit broadband has a true public peer set. SpaceX would not be entering an established category; it would be creating one.
History offers a useful reference point. When category defining market leaders go public, outcomes tend to diverge sharply. Some IPOs institutionalize leadership and enable long-term compounding; others see private market ambition collide with public market constraints. Tesla provides a clear modern example of the former. When it went public in 2010 at a valuation below $2 billion, Tesla had limited revenue, persistent losses and an unproven manufacturing model.12 Its IPO did not validate a finished business – it transferred a long duration industrial strategy into the public domain. Over the following decade, public markets served as a financing partner that enabled scale, despite frequent drawdowns and skepticism.
The parallel matters. Market leading companies tend to fare best when public markets function as long-term enablers rather than final arbiters of private valuations. For SpaceX, success will depend less on first day performance than on its ability to maintain confidence through periods of heavy investment, uneven profitability and heightened scrutiny.
For investors, the implication is clear. The SpaceX IPO is not merely a liquidity event or a test of market capacity. It is a referendum on whether today’s public market can underwrite private market ambition at unprecedented scale - and whether SpaceX can translate its private market dominance into durable leadership as a public company.
After an active start to the year, the private market entered March on a more mixed – but still constructive – footing. Top-level index performance moderated from February, with the equal-weighted Forge Private Market Index (FPMI) edging down -0.4% and the cap-weighted Forge Accuidity Private Market Index (FAPMI) rising 1.0%, even as public markets sold off sharply, with SPY down 4.9% and QQQ down 4.8%.13 The divergence reflected a market that continued to absorb selective repricing across late-stage private companies, even as risk sentiment deteriorated in public markets.
Beneath the headline index moves, March was defined by widening dispersion at the company level. Several names posted outsized gains tied to recent financing activity, led by Ayar Labs (+75.3%) following its Series E round14 and OpenAI (+45.9%) amid pre-IPO financing,15 making them the largest positive contributors to FPMI. Stripe (+16.0%) also contributed to both indices’ performance. These advances were partially offset by a small number of sharp decliners, including SambaNova (-38.5%), Upgrade (-30.9%) and Figma (-28.1%), which tempered otherwise broad progress. Taken together, March reinforced a familiar private market pattern: leadership continued to widen, but returns were increasingly shaped by selective repricing rather than a uniform rally.
Pricing Broadly Strengthens
Trade premiums and discounts improved meaningfully in March. The 90th percentile premium increased from 47% to 64% while the median improved from -11% to -3%. At the other end of the distribution, the 10th percentile improved sharply from -85% to -47%.16
Forge Data as of 03/31/2026
Strong buy interest close to historic highs
Buy side interest in March remained at recent highs with buys representing about two-thirds of all indications of interest over the month and the quarter. March ended with a buy-to-sell ratio of 66% buys to 34% sells at levels near the highs of 2025 – and even of 2020 and 2021.17
Forge Data as of 03/31/2026
About the Author
Andrew Alden, CFA, previously worked as the CIO of Semantiqa and as the Head of Quantitative Research at WeatherStorm Capital. With skills in asset and portfolio management, he brings a wealth of knowledge to his director role at Forge. Andrew has a Master of Financial Engineering from Haas School of Business, CA.
