The Logjam Breaks: SpaceX Prices, Anthropic and OpenAI File

June 2026 | PrePublic Equity Partners

For three years, the standard line in venture was that the IPO window was shut and the largest private companies were content to keep it that way. That era ended in roughly seven days.

SpaceX prices its IPO Thursday, with first trades Friday on the Nasdaq under ticker SPCX, at a fixed $135 per share. The base raise is $75 billion, rising toward $86 billion if underwriters exercise the over-allotment, the largest offering in history by a wide margin. In the same stretch, Anthropic and OpenAI each confidentially filed draft S-1 paperwork with the SEC. Anthropic filed first, on the heels of a funding round valuing the company near $965 billion. OpenAI followed days later, even while signaling it may stay private a while longer.

Neither AI lab committed to a listing. Both emphasized optionality. But confidential filings are not free gestures. They require audited financials, governance cleanup, and underwriter engagement. Companies do not file to stay private indefinitely. They file to be ready.

Why now

The simplest explanation is capital. Frontier AI development consumes cash at a scale private markets strain to supply, even with sovereign wealth funds and mega-funds writing the largest private checks ever seen. Alphabet just issued roughly $85 billion in new equity. Harry Stebbings put it bluntly on last week's 20VC: the "staying private is cool" posture is over, and everyone is moving to grab the capital while it's available.

The deeper explanation is competitive. An IPO is now a strategic weapon in the Anthropic–OpenAI rivalry, not just a financing event.

The revenue reversal

The most striking development is the inversion of the revenue race. Per reporting from The Information, Anthropic's annualized revenue is now estimated to run roughly 35% above OpenAI's. At the end of last year, Anthropic was generating less than half of OpenAI's revenue. That is one of the fastest relative share shifts we have seen between two category leaders at this scale.

The burn profiles diverge just as sharply. Anthropic has discussed listing as soon as Q4 and projects it could reach free-cash-flow positive as early as 2028. OpenAI is expected to burn more than $100 billion before potentially hitting that milestone around 2030, a trajectory visible in commitments like its $20 billion-plus chip agreement with Cerebras.

Public investors will price both growth and the cost of that growth. On current reporting, Anthropic enters the race with the lead on both axes. Being first to file does not guarantee better stock performance, and OpenAI retains enormous consumer distribution. But the framing has changed: this is no longer ChatGPT and everyone else.

SpaceX is the test case

Friday's debut matters beyond SpaceX itself. At a valuation near $1.77 trillion against under $19 billion in 2025 revenue, the listing asks public investors to underwrite a multi-decade story: Starlink's direct-to-cell expansion riding Starship's payload capacity, a compute business already booking roughly $2 billion per month from agreements with Anthropic and Google, and optionality in Grok and orbital data centers. The bear case is equally legible: crowded end markets, declining Starlink ARPU, compute commoditization, a demanding entry multiple, and keyman concentration in Elon Musk.

We have covered this listing from several angles as it took shape: why SpaceX pursued a structured IPO, why this debut is different because it arrives already massive, and the infrastructure dominance underpinning the bull case.

How the market digests that tension will set the tone for every mega-cap private company watching from the filing queue.

What this means for late-stage secondaries

For secondary investors, a wave of mega-listings does three things.

First, it converts marks into prices. SpaceX, Anthropic, and OpenAI together represent a meaningful share of total private market value. Public price discovery on these names will reset reference valuations across the late-stage cohort, in both directions.

Second, it compresses the pre-IPO window for the most sought-after names. As companies move from rumor to confidential filing to roadshow, secondary supply tightens and bid-ask spreads narrow. The opportunity migrates down the cohort, toward the next generation of companies still years from a listing.

Third, it validates the asset class. Every successful debut by a company that spent a decade-plus private reinforces the core premise of secondaries investing: the bulk of value creation now happens before the ticker exists.

The logjam took years to build. It is breaking in a single quarter, and the queue behind it is long.

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This post is provided for informational purposes only and does not constitute an offer to sell or a solicitation of an offer to buy any security. Any offering is made only to accredited investors pursuant to formal offering documents. Statements regarding third-party companies are based on publicly available reporting and have not been independently verified. Funds managed by PrePublic Equity Partners hold positions with exposure in certain companies mentioned, including SpaceX and Anthropic. Past performance is not indicative of future results.

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RESEARCH DISCLOSURE This article is for informational and educational purposes only. It represents independent thematic analysis prepared by PrePublic Equity Partners ("PEP") and is intended to discuss industry trends and company dynamics in the private markets. This content does not constitute investment advice, a recommendation, or a solicitation to buy or sell any security or investment product. PEP is not a registered investment adviser or broker-dealer. Any offer or solicitation relating to securities will be made only through definitive offering documents to eligible investors. PEP and its affiliates may hold financial interests in companies discussed herein and reserve the right to trade such positions at any time without notice. Private market investing involves significant risk, including illiquidity and potential loss of principal. All data is sourced from publicly available information and has not been independently verified.

IMPORTANT DISCLOSURE This content is published by PrePublic Equity Partners ("PEP") for informational and educational purposes only. It does not constitute an offer to sell, or solicitation of an offer to buy, any security. No such offer or solicitation is made except by means of a confidential Private Placement Memorandum or other definitive offering documents delivered to eligible investors only. PEP is not a registered investment adviser with the SEC or any state securities regulator. Nothing in this article should be construed as personalized investment, financial, legal, or tax advice. All views are the opinions of the author as of the date of publication and are subject to change without notice. Private market and pre-IPO investing involves a high degree of risk, including illiquidity, potential total loss of principal, and reliance on unverified private company data. Past analytical observations are not indicative of future results. PEP and its affiliates, officers, or employees may hold financial interests in companies discussed in this article. PEP reserves the right to buy or sell such positions at any time without notice. PEP does not receive compensation from issuers mentioned in its research. PEP is an independently operated subsidiary of Alumni Ventures, LLC.