As of October 24, 2026, 08:18 PM ET, Polymarket traders price $90B–$100B at 43.0% in How much will OpenAI raise in its IPO? — $11.2K traded so far.
The leading outcome, $90B–$100B, is priced at 43.0%.
Price changes for the leading market — 24 hours: -0.1 pts; past week: +1.9 pts; past month: +40.2 pts.
Since May 21, 2026, $90B–$100B has traded between 1.1% and 48.0%. It opened at 48.0% and last traded at 43.1%.
| Day | Close |
|---|---|
| Oct 16, 2026 | 41.2% |
| Oct 17, 2026 | 41.5% |
| Oct 18, 2026 | 40.5% |
| Oct 19, 2026 | 41.5% |
| Oct 20, 2026 | 42.2% |
| Oct 22, 2026 | 41.9% |
| Oct 23, 2026 | 43.1% |
$90B–$100B is favored at 43.0%.
| Outcome | Price | Implied probability | 24h change | Volume | Volume share |
|---|---|---|---|---|---|
| $90B–$100B | 43¢ | 43.0% | -0.1 pts | $748 | 6.7% |
| <$30B | 39¢ | 39.1% | +4.4 pts | $986 | 8.8% |
| $40B–$50B | 12¢ | 11.8% | -3.9 pts | $1.9K | 16.7% |
| $80B–$90B | 11¢ | 10.5% | +0.1 pts | $703 | 6.3% |
| $100B+ | 10¢ | 10.5% | — | $3.3K | 29.1% |
| $70B–$80B | 6¢ | 5.5% | -0.1 pts | $695 | 6.2% |
| $60B–$70B | 4¢ | 4.5% | — | $756 | 6.7% |
| $30B–$40B | 4¢ | 4.1% | — | $669 | 6.0% |
| $50B–$60B | 3¢ | 3.0% | — | $1.5K | 13.6% |
See the full live book for this market on Polymarket
The leading market's spread is 86¢ (bid 0¢ / ask 86¢) — a tighter spread means cheaper round-trip trading.
$11.2K has been traded on this event in total, $0 of it in the last 24 hours, across 9 markets.
This market is scheduled to end December 31, 2027, 11:59 PM ET.
This market will resolve according to the total gross proceeds raised by OpenAI in its initial public offering (IPO) at the time of pricing. The amount raised is defined as the aggregate dollar value of shares sold at the final offering price at the time of IPO pricing, as disclosed in the final prospectus filed with the U.S. Securities and Exchange Commission. Shares sold pursuant to any overallotment option (greenshoe) will not be considered. Secondary sales of existing shares by current shareholders will be included only to the extent that they are part of the IPO offering at pricing and reflected in the total gross proceeds. Private secondary transactions conducted outside of the IPO will not be considered. If the total proceeds fall exactly on a boundary between two ranges, this market will resolve to the higher range. If OpenAI does not complete an IPO by December 31, 2027, 11:59 PM ET, this market will resolve to the lowest bracket. The primary resolution source will be the final prospectus filed with the SEC; however, a consensus of credible reporting may also be used.
The largest current holder of the leading market holds 498 shares of No.
| Holder | Outcome held | Shares | Value at current price |
|---|---|---|---|
| 0xa5ef39c3… | No | 498 | $284 |
| Belated-Glue | Yes | 274 | $118 |
| Evil-Row | Yes | 74 | $32 |
| Small-Fellow-Mandolin | Yes | 72 | $31 |
| 0x56a89027… | Yes | 30 | $13 |
| Automatic-Cappuccino | Yes | 20 | $9 |
| Genuine-Tribe | Yes | 16 | $7 |
| Deficient-Outrun | Yes | 5 | $2 |
| Blind-Leaf | Yes | 5 | $2 |
| Tepid-Monopoly | Yes | 3 | $1 |
| Time | Outcome | Side | Price | Size |
|---|---|---|---|---|
| Oct 16, 12:35 AM ET | No | BUY | 73.0% | $5 |
| Oct 16, 12:35 AM ET | No | BUY | 69.0% | $10 |
| Oct 16, 12:35 AM ET | No | BUY | 94.7% | $170 |
| Oct 16, 12:35 AM ET | No | BUY | 72.0% | $143 |
| Oct 16, 12:35 AM ET | Yes | BUY | 32.9% | $3 |
| Oct 16, 12:35 AM ET | No | BUY | 69.0% | $6 |
| Oct 16, 12:35 AM ET | No | BUY | 69.0% | $137 |
| Oct 16, 12:35 AM ET | No | BUY | 94.7% | $188 |
| Sep 27, 04:10 AM ET | Yes | SELL | 17.0% | $4 |
| Sep 26, 06:44 PM ET | Yes | SELL | 30.0% | $28 |
As of October 24, 2026, 08:08 PM ET, the leading outcome is $90B–$100B at 43.0%. Next is <$30B at 39.1%. See the live book on Polymarket: https://polymarket.com/event/how-much-will-openai-raise-in-its-ipo?via=bro
$11.2K in total volume, with $0 traded in the last 24 hours across 9 markets.
The market is scheduled to end December 31, 2027, 11:59 PM ET.
$90B–$100B, priced at 43.0% as of October 24, 2026, 08:08 PM ET. Prices are implied probabilities backed by real-money trading.
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