The OpenAI IPO 2027 board is a market-cap ladder, not a single yes/no. Traders are pricing a stack of thresholds for what OpenAI is worth at the close of its first trading day, from above $800B up to above $1.6T, with the $1T line as the headline question. The ladder carries roughly $1.5M in cumulative volume on Polymarket and resolves by December 31, 2027. The live board above ranks the current price on every threshold; the rungs get steeper as the number climbs.
OpenAI has no public listing and no confirmed IPO date, yet it already trades as one of the most-watched pre-IPO names on prediction markets. This board does not ask a single question. It is a ladder of market-cap thresholds, each a separate Yes/No contract on whether OpenAI's first-day closing valuation clears a given line. The rungs run from above $800B at the bottom to above $1.6T at the top, and the spread between them is the whole story.
A ladder market like this one is built to price a distribution, not a coin flip. Each rung asks the same question at a higher number: does OpenAI close its first trading day above $800B, above $1T, above $1.2T, above $1.4T, above $1.6T. By construction the lower rungs always price higher than the upper rungs, because any valuation that clears $1.4T also clears $1T. The live board above shows where each line sits right now, and the gap between adjacent rungs is the market's implied odds that OpenAI lands inside that band.
The candidates list on this page is empty, and that is expected. A threshold ladder does not have named contenders the way a championship or an election board does. It has rungs. The data renders as the alt-lines ladder above rather than a roster of candidates, so an empty candidates array here is the correct shape, not a gap.
The number that anchors the board is the $1T line. A trillion-dollar first-day close would put OpenAI in rare company among public debuts, and the ladder lets traders express far more than a binary view: someone who believes the IPO happens but lands closer to $1T than $1.6T can buy the lower rungs and sell the higher ones. The volume is concentrated on Polymarket, which is the only platform currently listing the contract, so there is no cross-platform spread to arbitrage here yet. If Kalshi lists a matching ladder, the live board above will surface both sides.
Each rung resolves to Yes if OpenAI's official closing market capitalization on its first trading day is above that rung's threshold, and No otherwise. Market capitalization is defined as total outstanding shares multiplied by the first-day closing share price, read from the primary exchange's official listing page. The hard backstop is December 31, 2027 at 11:59 PM ET: if no IPO has occurred by then, every rung resolves No.
For the broader pipeline of debuts, see the IPO announcement market odds, which tracks which companies formally announce an offering. To put a trillion-dollar valuation in context, the largest company by market cap odds prices which name sits at the top of the global leaderboard. Browse the full finance prediction markets hub for related corporate and valuation boards, and see more coverage from Genius Staff.
Each rung of this ladder resolves to Yes if OpenAI's official closing market capitalization on its first trading day is above that rung's threshold ($800B, $1T, $1.2T, $1.4T, or $1.6T), and to No otherwise. Market capitalization is defined as total outstanding shares multiplied by the closing share price on the first day of trading, read from the primary exchange's official listing page, with a reliable secondary source used if that figure is not displayed. If trading is interrupted on the first day by a circuit breaker or half-day, the contract uses the official closing price of the abbreviated session, or the next day on which an official close is published. If no IPO occurs by December 31, 2027 at 11:59 PM ET, every rung resolves No.
The board is a market-cap ladder with five rungs from above $800B to above $1.6T, with the $1T line as the headline question. The live board above shows the current Polymarket price on every threshold.
Each rung resolves on OpenAI's first trading day based on its official closing market cap. The hard backstop is December 31, 2027 at 11:59 PM ET, after which every rung resolves No if no IPO has occurred.
The ladder is currently listed on Polymarket, which holds roughly $1.5M in cumulative volume across the five rungs. Kalshi does not list a matching ladder yet, so there is no cross-platform spread to compare.
It prices a distribution rather than a coin flip. Each rung is a separate Yes/No on whether the first-day close clears a given market cap, so lower rungs like $800B always price higher than upper rungs like $1.6T.
Watch for any formal IPO filing or listing date, new private-round valuations that reset the anchor, and AI-sector market-cap multiples that move the upper $1.4T and $1.6T rungs ahead of the December 2027 deadline.