Skip to main content
icon for Largest private company end of September?

Largest private company end of September?

icon for Largest private company end of September?

Largest private company end of September?

Perplexity 51%

OpenAI 50%

Anduril 50%

Anthropic 50%

Polymarket
NEW

Perplexity 51%

OpenAI 50%

Anduril 50%

Anthropic 50%

Polymarket
NEW
icon for Perplexity

Perplexity

$0 Vol.

51%

icon for OpenAI

OpenAI

$0 Vol.

50%

icon for Anduril

Anduril

$0 Vol.

50%

icon for Anthropic

Anthropic

$0 Vol.

50%

icon for ByteDance

ByteDance

$0 Vol.

50%

icon for Databricks

Databricks

$0 Vol.

50%

icon for Neuralink

Neuralink

$0 Vol.

50%

icon for Revolut

Revolut

$0 Vol.

50%

icon for Stripe

Stripe

$0 Vol.

50%

icon for Canva

Canva

$0 Vol.

49%

This market will resolve to the listed company with the largest private market valuation on September 30, 2026. NPM Prices are published for trading days only and are updated once daily at 1:00 PM ET on the following calendar day. If NPM has not published relevant data for all business dates in the specified period by 1:00 PM ET on the calendar date following the specified date, this market may remain open until 11:59 PM ET on the third business day following the specified date. If no further data is released by that time, the market will resolve according to the data available. If NPM ceases publishing relevant data prior to the specified date, this market will resolve based on the NPM data published prior to the cessation of coverage, as well as applicable public market capitalization data following an IPO or direct listing. If a company completes an IPO or direct listing before the specified date, this market will resolve based on its final NPM valuation published between market creation and the IPO or direct listing date, as this market is based on private market valuations only. If a listed company merges with or acquires another entity and remains the parent company, no change to resolution methodology applies. If a listed company is acquired, merges into another entity and is no longer the surviving parent company, or otherwise ceases to exist as an independent entity prior to the end of the period, only the NPM valuation achieved prior to completion of the transaction will be considered for resolution. No transaction, acquisition, or merger consideration will be considered for resolution. If two or more companies are tied for the highest valuation, the markets will resolve in favor of the company that achieved that valuation first. If the valuations were achieved on the same day, the market will resolve in favor of the company whose listed name comes first alphabetically. Revisions to previously published NPM data made after their initial release will not be considered, unless made to correct clearly erroneous data. The resolution sources for this market are: https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-c62b8140-fdeb-428d-a9a6-d04eb3b24b49 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-3e197763-4ff8-4d8c-bd1f-cc2792937757 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-f364d2ab-34b7-48c9-a2b7-af62da804953 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-5e0e75a3-96d6-4893-8f23-9d9bac0ec1db https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-53787f17-a704-47a9-895a-cb54833bdb1f https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-782c0a32-4727-4097-a40b-9a2602f243e7 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-30839e0b-2730-4495-839f-1bf638fa9cca https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-802a7f97-3625-4614-a13d-d999cf139330 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-70f3c3d1-565b-491a-83df-54d0c8b08186 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-6edded11-6786-4392-9695-3cce6fda0de0.Recent secondary tenders and large AI-focused funding rounds have left Anthropic, OpenAI, Databricks, Stripe, and Revolut clustered near the top of private valuations, producing the tight 49.5–51% market-implied odds. Anthropic’s $965 billion May Series H and OpenAI’s August tender at $852 billion reflect sustained investor demand for frontier large language models and compute access, while Databricks’ $190 billion August raise and Stripe’s payments-plus-AI infrastructure deals underscore how data platforms and developer tools are capturing similar capital. ByteDance’s lower marks and Perplexity’s smaller size highlight differentiation by revenue scale and regulatory overhang. With September resolution approaching, any new tender, revenue disclosure, or IPO filing could quickly reorder the leaderboard.

This market will resolve to the listed company with the largest private market valuation on September 30, 2026.

NPM Prices are published for trading days only and are updated once daily at 1:00 PM ET on the following calendar day.

If NPM has not published relevant data for all business dates in the specified period by 1:00 PM ET on the calendar date following the specified date, this market may remain open until 11:59 PM ET on the third business day following the specified date. If no further data is released by that time, the market will resolve according to the data available.

If NPM ceases publishing relevant data prior to the specified date, this market will resolve based on the NPM data published prior to the cessation of coverage, as well as applicable public market capitalization data following an IPO or direct listing.

If a company completes an IPO or direct listing before the specified date, this market will resolve based on its final NPM valuation published between market creation and the IPO or direct listing date, as this market is based on private market valuations only.

If a listed company merges with or acquires another entity and remains the parent company, no change to resolution methodology applies.

If a listed company is acquired, merges into another entity and is no longer the surviving parent company, or otherwise ceases to exist as an independent entity prior to the end of the period, only the NPM valuation achieved prior to completion of the transaction will be considered for resolution. No transaction, acquisition, or merger consideration will be considered for resolution.

If two or more companies are tied for the highest valuation, the markets will resolve in favor of the company that achieved that valuation first. If the valuations were achieved on the same day, the market will resolve in favor of the company whose listed name comes first alphabetically.

Revisions to previously published NPM data made after their initial release will not be considered, unless made to correct clearly erroneous data.

The resolution sources for this market are:
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-c62b8140-fdeb-428d-a9a6-d04eb3b24b49
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-3e197763-4ff8-4d8c-bd1f-cc2792937757
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-f364d2ab-34b7-48c9-a2b7-af62da804953
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-5e0e75a3-96d6-4893-8f23-9d9bac0ec1db
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-53787f17-a704-47a9-895a-cb54833bdb1f
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-782c0a32-4727-4097-a40b-9a2602f243e7
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-30839e0b-2730-4495-839f-1bf638fa9cca
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-802a7f97-3625-4614-a13d-d999cf139330
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-70f3c3d1-565b-491a-83df-54d0c8b08186
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-6edded11-6786-4392-9695-3cce6fda0de0.
Volume
$0
End Date
Oct 1, 2026
Market Opened
Aug 31, 2026, 7:23 PM ET
This market will resolve to the listed company with the largest private market valuation on September 30, 2026. NPM Prices are published for trading days only and are updated once daily at 1:00 PM ET on the following calendar day. If NPM has not published relevant data for all business dates in the specified period by 1:00 PM ET on the calendar date following the specified date, this market may remain open until 11:59 PM ET on the third business day following the specified date. If no further data is released by that time, the market will resolve according to the data available. If NPM ceases publishing relevant data prior to the specified date, this market will resolve based on the NPM data published prior to the cessation of coverage, as well as applicable public market capitalization data following an IPO or direct listing. If a company completes an IPO or direct listing before the specified date, this market will resolve based on its final NPM valuation published between market creation and the IPO or direct listing date, as this market is based on private market valuations only. If a listed company merges with or acquires another entity and remains the parent company, no change to resolution methodology applies. If a listed company is acquired, merges into another entity and is no longer the surviving parent company, or otherwise ceases to exist as an independent entity prior to the end of the period, only the NPM valuation achieved prior to completion of the transaction will be considered for resolution. No transaction, acquisition, or merger consideration will be considered for resolution. If two or more companies are tied for the highest valuation, the markets will resolve in favor of the company that achieved that valuation first. If the valuations were achieved on the same day, the market will resolve in favor of the company whose listed name comes first alphabetically. Revisions to previously published NPM data made after their initial release will not be considered, unless made to correct clearly erroneous data. The resolution sources for this market are: https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-c62b8140-fdeb-428d-a9a6-d04eb3b24b49 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-3e197763-4ff8-4d8c-bd1f-cc2792937757 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-f364d2ab-34b7-48c9-a2b7-af62da804953 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-5e0e75a3-96d6-4893-8f23-9d9bac0ec1db https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-53787f17-a704-47a9-895a-cb54833bdb1f https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-782c0a32-4727-4097-a40b-9a2602f243e7 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-30839e0b-2730-4495-839f-1bf638fa9cca https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-802a7f97-3625-4614-a13d-d999cf139330 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-70f3c3d1-565b-491a-83df-54d0c8b08186 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-6edded11-6786-4392-9695-3cce6fda0de0.
This market will resolve to the listed company with the largest private market valuation on September 30, 2026. NPM Prices are published for trading days only and are updated once daily at 1:00 PM ET on the following calendar day. If NPM has not published relevant data for all business dates in the specified period by 1:00 PM ET on the calendar date following the specified date, this market may remain open until 11:59 PM ET on the third business day following the specified date. If no further data is released by that time, the market will resolve according to the data available. If NPM ceases publishing relevant data prior to the specified date, this market will resolve based on the NPM data published prior to the cessation of coverage, as well as applicable public market capitalization data following an IPO or direct listing. If a company completes an IPO or direct listing before the specified date, this market will resolve based on its final NPM valuation published between market creation and the IPO or direct listing date, as this market is based on private market valuations only. If a listed company merges with or acquires another entity and remains the parent company, no change to resolution methodology applies. If a listed company is acquired, merges into another entity and is no longer the surviving parent company, or otherwise ceases to exist as an independent entity prior to the end of the period, only the NPM valuation achieved prior to completion of the transaction will be considered for resolution. No transaction, acquisition, or merger consideration will be considered for resolution. If two or more companies are tied for the highest valuation, the markets will resolve in favor of the company that achieved that valuation first. If the valuations were achieved on the same day, the market will resolve in favor of the company whose listed name comes first alphabetically. Revisions to previously published NPM data made after their initial release will not be considered, unless made to correct clearly erroneous data. The resolution sources for this market are: https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-c62b8140-fdeb-428d-a9a6-d04eb3b24b49 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-3e197763-4ff8-4d8c-bd1f-cc2792937757 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-f364d2ab-34b7-48c9-a2b7-af62da804953 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-5e0e75a3-96d6-4893-8f23-9d9bac0ec1db https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-53787f17-a704-47a9-895a-cb54833bdb1f https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-782c0a32-4727-4097-a40b-9a2602f243e7 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-30839e0b-2730-4495-839f-1bf638fa9cca https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-802a7f97-3625-4614-a13d-d999cf139330 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-70f3c3d1-565b-491a-83df-54d0c8b08186 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-6edded11-6786-4392-9695-3cce6fda0de0.Recent secondary tenders and large AI-focused funding rounds have left Anthropic, OpenAI, Databricks, Stripe, and Revolut clustered near the top of private valuations, producing the tight 49.5–51% market-implied odds. Anthropic’s $965 billion May Series H and OpenAI’s August tender at $852 billion reflect sustained investor demand for frontier large language models and compute access, while Databricks’ $190 billion August raise and Stripe’s payments-plus-AI infrastructure deals underscore how data platforms and developer tools are capturing similar capital. ByteDance’s lower marks and Perplexity’s smaller size highlight differentiation by revenue scale and regulatory overhang. With September resolution approaching, any new tender, revenue disclosure, or IPO filing could quickly reorder the leaderboard.

This market will resolve to the listed company with the largest private market valuation on September 30, 2026.

NPM Prices are published for trading days only and are updated once daily at 1:00 PM ET on the following calendar day.

If NPM has not published relevant data for all business dates in the specified period by 1:00 PM ET on the calendar date following the specified date, this market may remain open until 11:59 PM ET on the third business day following the specified date. If no further data is released by that time, the market will resolve according to the data available.

If NPM ceases publishing relevant data prior to the specified date, this market will resolve based on the NPM data published prior to the cessation of coverage, as well as applicable public market capitalization data following an IPO or direct listing.

If a company completes an IPO or direct listing before the specified date, this market will resolve based on its final NPM valuation published between market creation and the IPO or direct listing date, as this market is based on private market valuations only.

If a listed company merges with or acquires another entity and remains the parent company, no change to resolution methodology applies.

If a listed company is acquired, merges into another entity and is no longer the surviving parent company, or otherwise ceases to exist as an independent entity prior to the end of the period, only the NPM valuation achieved prior to completion of the transaction will be considered for resolution. No transaction, acquisition, or merger consideration will be considered for resolution.

If two or more companies are tied for the highest valuation, the markets will resolve in favor of the company that achieved that valuation first. If the valuations were achieved on the same day, the market will resolve in favor of the company whose listed name comes first alphabetically.

Revisions to previously published NPM data made after their initial release will not be considered, unless made to correct clearly erroneous data.

The resolution sources for this market are:
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-c62b8140-fdeb-428d-a9a6-d04eb3b24b49
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-3e197763-4ff8-4d8c-bd1f-cc2792937757
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-f364d2ab-34b7-48c9-a2b7-af62da804953
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-5e0e75a3-96d6-4893-8f23-9d9bac0ec1db
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-53787f17-a704-47a9-895a-cb54833bdb1f
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-782c0a32-4727-4097-a40b-9a2602f243e7
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-30839e0b-2730-4495-839f-1bf638fa9cca
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-802a7f97-3625-4614-a13d-d999cf139330
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-70f3c3d1-565b-491a-83df-54d0c8b08186
https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-6edded11-6786-4392-9695-3cce6fda0de0.
Volume
$0
End Date
Oct 1, 2026
Market Opened
Aug 31, 2026, 7:23 PM ET
This market will resolve to the listed company with the largest private market valuation on September 30, 2026. NPM Prices are published for trading days only and are updated once daily at 1:00 PM ET on the following calendar day. If NPM has not published relevant data for all business dates in the specified period by 1:00 PM ET on the calendar date following the specified date, this market may remain open until 11:59 PM ET on the third business day following the specified date. If no further data is released by that time, the market will resolve according to the data available. If NPM ceases publishing relevant data prior to the specified date, this market will resolve based on the NPM data published prior to the cessation of coverage, as well as applicable public market capitalization data following an IPO or direct listing. If a company completes an IPO or direct listing before the specified date, this market will resolve based on its final NPM valuation published between market creation and the IPO or direct listing date, as this market is based on private market valuations only. If a listed company merges with or acquires another entity and remains the parent company, no change to resolution methodology applies. If a listed company is acquired, merges into another entity and is no longer the surviving parent company, or otherwise ceases to exist as an independent entity prior to the end of the period, only the NPM valuation achieved prior to completion of the transaction will be considered for resolution. No transaction, acquisition, or merger consideration will be considered for resolution. If two or more companies are tied for the highest valuation, the markets will resolve in favor of the company that achieved that valuation first. If the valuations were achieved on the same day, the market will resolve in favor of the company whose listed name comes first alphabetically. Revisions to previously published NPM data made after their initial release will not be considered, unless made to correct clearly erroneous data. The resolution sources for this market are: https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-c62b8140-fdeb-428d-a9a6-d04eb3b24b49 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-3e197763-4ff8-4d8c-bd1f-cc2792937757 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-f364d2ab-34b7-48c9-a2b7-af62da804953 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-5e0e75a3-96d6-4893-8f23-9d9bac0ec1db https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-53787f17-a704-47a9-895a-cb54833bdb1f https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-782c0a32-4727-4097-a40b-9a2602f243e7 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-30839e0b-2730-4495-839f-1bf638fa9cca https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-802a7f97-3625-4614-a13d-d999cf139330 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-70f3c3d1-565b-491a-83df-54d0c8b08186 https://fe.secondmarket.com/companies/data?start_date=2025-12-31&view=valuation&companies=company-6edded11-6786-4392-9695-3cce6fda0de0.

Beware of external links.

Frequently Asked Questions

"Largest private company end of September?" is a prediction market on Polymarket with 10 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "Perplexity" at 51%, followed by "OpenAI" at 50%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 51¢ implies that the market collectively assigns a 51% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

"Largest private company end of September?" is a newly created market on Polymarket, launched on Aug 31, 2026. As an early market, this is your opportunity to be among the first traders to set the odds and establish the market's initial price signals. You can also bookmark this page to track volume and trading activity as the market gains traction over time.

To trade on "Largest private company end of September?," browse the 10 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "Largest private company end of September?" is "Perplexity" at 51%, meaning the market assigns a 51% chance to that outcome. The next closest outcome is "OpenAI" at 50%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "Largest private company end of September?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.