Goldman Sachs holds a commanding 75.5% implied probability as lead-left bookrunner for OpenAI’s IPO because the firm has secured prominent roles in major AI and tech listings, including recent work with OpenAI alongside Morgan Stanley on confidential S-1 preparations. Both banks were tapped early for prospectus drafting and syndicate coordination, reflecting their unmatched track record in large-cap artificial-intelligence debuts and deep relationships with institutional investors. Recent volatility in tech stocks prompted OpenAI to weigh a potential 2027 delay, yet this has not shifted the established banker lineup. Morgan Stanley trails at 22.5% due to comparable but slightly less dominant positioning in similar mandates, while other firms remain marginal.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLead Bank in OpenAI's IPO?
Goldman Sachs 76%
Morgan Stanley 23%
UBS 1.8%
Bank of America 1.0%
$42,650 Vol.
$42,650 Vol.

Goldman Sachs
76%

Morgan Stanley
23%

UBS
2%

Bank of America
1%

JPMorgan
<1%

Wells Fargo
<1%

Citigroup
<1%

Barclays
<1%

Deutsche Bank
<1%
Goldman Sachs 76%
Morgan Stanley 23%
UBS 1.8%
Bank of America 1.0%
$42,650 Vol.
$42,650 Vol.

Goldman Sachs
76%

Morgan Stanley
23%

UBS
2%

Bank of America
1%

JPMorgan
<1%

Wells Fargo
<1%

Citigroup
<1%

Barclays
<1%

Deutsche Bank
<1%
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.
Market Opened: May 21, 2026, 12:17 PM ET
Resolver
0x69c47De9D...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.
Resolver
0x69c47De9D...Goldman Sachs holds a commanding 75.5% implied probability as lead-left bookrunner for OpenAI’s IPO because the firm has secured prominent roles in major AI and tech listings, including recent work with OpenAI alongside Morgan Stanley on confidential S-1 preparations. Both banks were tapped early for prospectus drafting and syndicate coordination, reflecting their unmatched track record in large-cap artificial-intelligence debuts and deep relationships with institutional investors. Recent volatility in tech stocks prompted OpenAI to weigh a potential 2027 delay, yet this has not shifted the established banker lineup. Morgan Stanley trails at 22.5% due to comparable but slightly less dominant positioning in similar mandates, while other firms remain marginal.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated

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