Leaked OpenAI cap table reveals massive paper gains

A leaked capitalization table for OpenAI Group PBC is making the rounds on X, shedding rare light on who actually owns the artificial intelligence giant as it targets an $852 billion post-money valuation.

The document, reconstructed from public regulatory filings and secondary market data by investor Sheel Mohnot, maps out an eye-popping scoreboard of paper gains. While outside sources have not independently audited the breakdown, it previews the stakes of what could be tech's biggest public debut since Google in 2004.

Big tech wins big, early bets print fortunes

Microsoft sits at the very top of the ledger.

Backing OpenAI with roughly $13 billion across multiple rounds since 2019, Microsoft holds a 26.79% stake worth approximately $228.3 billion. That equates to an unrealized gain of $215.3 billion, or a nearly 18x return multiple. Yet the ties between the two are increasingly fraught. OpenAI recently flagged Microsoft as an operational risk in investor documents, as cloud exclusivity pacts and Elon Musk's pending fraud lawsuit complicate the alliance.

SoftBank, meanwhile, bought its seat with brute financial force.

With total commitments reaching $64.6 billion, Masayoshi Son's conglomerate owns 11.66%, valued at $99.3 billion. SoftBank even secured a $40 billion bridge loan from JPMorgan and Goldman Sachs to fund its multi-tranche commitment through December 2025. At current marks, its paper profit stands above $50 billion.

Smaller funds notched jaw-dropping multiples.

Sound Ventures, co-founded by actor Ashton Kutcher, turned an early $20 million to $30 million check into roughly $1.3 billion, scoring an astonishing 43x multiple. Khosla Ventures converted its 2019 check of $50 million into $1.5 billion, pocketing a 30x return despite controlling only 0.18% of the company.

Thrive Capital pulled off a rare late-stage coup. Josh Kushner's firm committed around $3.5 billion across several recent rounds, assembling a 1.98% stake valued at $16.9 billion. That translates to an unrealized dollar gain of $13.4 billion.

The ghost founder and the non-profit kingmaker

Two entries on the table defy standard Silicon Valley mechanics.

First, Sam Altman's stake is listed as TBD across every category. Public records confirm he currently holds zero equity in the business he has piloted for seven years. While an equity grant remains tied to its public benefit corporation transition, a founder-CEO commanding an $852 billion enterprise with zero personal ownership has virtually no precedent in corporate history.

Second, the original non-profit OpenAI Foundation owns 25.80% at zero cost basis, sitting on nearly $220 billion in unearned value. Crucially, the Foundation retains 100% of board appointment power despite holding a minority financial stake. That structural paradox is the centerpiece of Elon Musk's fraud lawsuit, set for trial on April 27.

Why it matters

While the spreadsheet looks like a victory lap for venture capital, we believe it exposes significant governance vulnerabilities ahead of an IPO.

The era of outsized VC windfalls in frontier AI is effectively over. The gargantuan multiples logged by Kutcher's fund and Khosla reflect a fleeting historical window. Today, surviving the compute race requires the balance-sheet firepower of sovereign-scale players like SoftBank and Microsoft. Everyday funds are largely priced out.

More critically, the governance setup looks unsustainable under public-market scrutiny. Public equity investors tolerate unconventional voting setups, but rarely one where an outside non-profit entity retains total boardroom authority while the CEO owns nothing. If OpenAI cannot resolve the friction between its altruistic charter and commercial fiduciary duties before entering public trading, this cap table could quickly turn into a legal and valuation liability.