# OpenAI IPO Closing Market Cap: 1.5T+

> 1.5T+ leads at 47%, runner-up 42% across 2 winner-take-all outcomes — refreshed 42 min ago.

URL: https://simplefunctions.dev/odds/openai-ipo-closing-market-cap-15t
Updated: 2026-06-08T06:20:11.422Z
Category: technology · Topic: ai-tech
Status: active
Closes: 2027-12-31

## Headline

- Leader: 1.5T+ at 47%
- Runner-up: 1.5T+ at 42%
- Outcomes: 2 (winner-take-all)
- Venue: Polymarket (2 contracts)
- 24h volume: $2K

## Bound contracts (2)

| Outcome | Price | 24h | Volume | Venue | Slug |
|---|---|---|---|---|---|
| 1.5T+ | 47¢ | +10pp | $980 | polymarket | /markets/openai-ipo-closing-market-cap-15t-polymarket-0x4a8005d19b41af72c1cd5c619640d9d51da548dd7c3544b12ae0c520d9e6805b |
| 1.5T+ | 42¢ | +7pp | $665 | polymarket | /markets/openai-ipo-closing-market-cap-15t-polymarket-0x258cf80073b2deb3b08b53bd96715db3924458eb6d80ad670089cc639aa00260 |

## 30-day trajectory

| Day | 1.5T+ | 1.5T+ |
|---|---|---|
| 2026-05-09 | 16 | 43 |
| 2026-05-25 | 25 | 35 |
| 2026-06-01 | 31 | 35 |
| 2026-06-08 | 43 | 40 |

_31 days of price history captured. Each row is the daily mean of intraday 5-min captures._

## What moved the line

- 2026-06-07 · 1.5T+ +10pp 23→33¢ · polymarket
- 2026-06-08 · 1.5T+ +10pp 33→43¢ · polymarket
- 2026-06-04 · 1.5T+ −9pp 30→21¢ · polymarket
- 2026-06-08 · 1.5T+ +7pp 33→40¢ · polymarket
- 2026-06-06 · 1.5T+ −6pp 33→27¢ · polymarket

## Analysis

This probability estimates the chance that OpenAI will go public with a market capitalization of $1.5 trillion or higher by the end of 2026. The current 44% probability reflects significant uncertainty around both timing and valuation. Market pricing suggests traders view a near-term IPO as unlikely—the 73¢ contract for "no IPO by December 31, 2026" indicates most expect the process to extend beyond this year. OpenAI's actual IPO timeline depends on regulatory approval, internal governance decisions, and market conditions. Key resolution drivers include formal IPO announcements, SEC filings, or public statements from leadership about timing. The wide gap between the no-IPO contract (73¢) and the 1.5T+ contract (11¢) suggests traders see liquidity events and high valuations as less probable near-term outcomes, though OpenAI's recent funding rounds and continued AI market dominance create potential upside catalysts.

### Key factors

- OpenAI has not announced an IPO filing or formal timeline; the 73¢ price on the no-IPO contract suggests market consensus expects delays beyond 2026
- OpenAI's last known valuation was $80-100 billion (late 2023); reaching $1.5T would require 15-20x growth, requiring demonstrated revenue acceleration or market sentiment shift
- SEC regulatory scrutiny of AI companies and governance structure uncertainty could delay or complicate a public offering
- Competitive pressure from other AI companies and potential changes in OpenAI's corporate structure (e.g., for-profit conversion) remain unresolved
- Market liquidity conditions and broader tech IPO appetite in late 2026 will materially affect both probability of listing and valuation multiples

## Methodology

Headline is the **leader's price**, not an arithmetic mean — averaging disjoint winner-take-all outcomes is meaningless. Per-outcome prices come from the venue's last-traded mid; cross-venue values are simple means across contracts on each venue.

## How to use this data

- HTML: https://simplefunctions.dev/odds/openai-ipo-closing-market-cap-15t
- JSON: https://simplefunctions.dev/api/public/odds?slug=openai-ipo-closing-market-cap-15t
- Topic hub: https://simplefunctions.dev/predictions/ai-tech

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