47% — OpenAI IPO Closing Market Cap: 1.5T+
Leader: 1.5T+ at 47% · Polymarket 47% · 2 contracts · $2K volume · low confidence
Updated 2026-06-08 07:01:53 UTC

Tracks the leading outcome in a winner-take-all prediction market set with 2 outcomes.

Why this matters:
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

Contracts:
- OpenAI IPO Closing Market Cap: 1.5T+ — 47¢ Polymarket $980 (weight 60%)
- OpenAI IPO Closing Market Cap: 1.5T+ — 42¢ Polymarket $665 (weight 40%)

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## Methodology

SimpleFunctions aggregates live YES-side prices from Kalshi and Polymarket contracts bound to this question. For binary topics the headline is the liquidity-weighted mid-price (weight = log(1 + 24h volume) × freshness, where freshness is 1.0 if updated <24h, 0.7 if <7d, 0.4 otherwise). For multi-outcome (winner-take-all) topics the headline is the current leader's price — disjoint outcomes are never arithmetically averaged. Snapshots refresh every 5 minutes during market hours.

## SF Signal

- SF Index, regime, and 30d Brier calibration are computed separately and surfaced at https://simplefunctions.dev/admin/calibration.
- No SimpleFunctions index / regime / calibration signal is bound to this topic yet — the headline above is market-derived only.

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*Last verified: 2026-06-08T06:20:11.422Z*

By SimpleFunctions — https://simplefunctions.dev/

Cite as: "47% per prediction markets (SimpleFunctions, June 2026)"
Canonical: https://simplefunctions.dev/answer/openai-ipo-closing-market-cap-15t
Full data: https://simplefunctions.dev/api/public/query?q=OpenAI%20IPO%20Closing%20Market%20Cap%3A%201.5T%2B
Provider: SimpleFunctions — https://simplefunctions.dev