PolymarketCheck availabilityNo KYC2% feeVerified resolution dataWell calibratedCurrent implied probability
Goldman Sachs 84.8%+9.0ptLeader of 9 outcomes
Market quality
70 / 100
Medium quality24h Volume
$3K
Liquidity
$20.8K
Medium liquiditySpread
3.0 pt
Moderate spreadComments
0
7d Change
+15.5 pts
Market data
Updated 11 minutes ago
May 21, 26, 4:21 PM UTCDec 31, 27, 12:00 AM UTC
Trends
0%
0%
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Related Markets
Related questions for context, not a comparison of equivalent contracts.
Rules
This market will resolve according to the bank that serves as the lead underwriter in the initial public offering of OpenAI.
- If no IPO occurs by December 31, 2027, 11:59 PM ET, or OpenAI completes an initial public offering without a designated lead underwriter, this market will resolve to “Other.”
- If multiple banks are identified as lead underwriters, this market will resolve according to the primary lead underwriter.
- If the hierarchy between them is unclear, this market will resolve once it is conclusively evident which bank is the primary lead underwriter, for example, through the order in which the banks are listed in the underwriting section of OpenAI's final initial public offering prospectus, once released.
- The primary resolution source for this market will be official disclosures from OpenAI.
- A consensus of credible reporting may also be used.
Prediction Source Comparison
- Also available on Kalshi — Which bank will lead OpenAI's IPO? · Goldman Sachs 71%
Open markets
AI
KALSHITop AI model in September?
- claude-fable-5.1-max+60.0pt71%
- claude-opus-5-max+1.0pt7%
- claude-opus-4-6-thinking4%
+3 more outcomes
- Total Vol
- $154.3K
- 24h Vol
- $116.6K
KALSHIBest AI at the end of 2026?
- Claude+4.8pt60.8%
- ChatGPT+0.5pt25.5%
- Grok-3.4pt5.9%
+5 more outcomes
- Total Vol
- $10.5M
POLYMARKETAnthropic IPO by which date?
- December 31,-1.0pt90%
- December 15,+1.0pt86%
- November 30,84%
+7 more outcomes
- Total Vol
POLYMARKETWill CMI declare a Millennium Prize Problem solved by which date?
- 2028+22.0pt62.2%
- 2027+11.0pt28.6%
- 2026+4.5pt9.2%
KALSHIBest AI in Sep 2026?
- Claude+5.0pt80.4%
- ChatGPT-2.0pt12.2%
- Grok2.8%
+4 more outcomes
- Total Vol
- $374.6K
- 24h Vol
POLYMARKETOpenAI’s Astra Model: Text Arena Debut?
- 1480+-1.0pt66%
- 1490+-3.0pt51%
- 1500+-1.0pt30%
+2 more outcomes
- Largest IPO by market cap in 2026?
- OpenAI IPO Closing Market Cap
- When will OpenAI achieve AGI?
- OpenAI announces it has achieved AGI before 2027?
- Will Anthropic’s valuation hit __ by December 31?
- Will OpenAI's valuation hit __ by December 31?
- Next Google Gemini Pro Model released by which date?
- Anthropic IPO Closing Market Cap
- What will OpenAI's IPO valuation be?
- Which company has best AI model end of 2026?
Frequently asked questions
- What are the current odds for Lead Bank in OpenAI's IPO??
- Polymarket prices Goldman Sachs at 85% as of September 8, 2026.
- When does Lead Bank in OpenAI's IPO? resolve?
- Lead Bank in OpenAI's IPO? is scheduled to resolve on December 31, 2027.
- How is Lead Bank in OpenAI's IPO? settled?
- Polymarket settles this market as follows: This market will resolve according to the bank that serves as the lead underwriter in the initial public offering of OpenAI.
- Where else is Lead Bank in OpenAI's IPO? listed?
- The same question is also listed on Kalshi.