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1,380,975,298

OPEN INTEREST:

$1,211,529,597

342,832

Markets across

34,170

events

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4,388

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3rd Largest Company end of September?
Other
polymarket
kalshi

3rd Largest Company end of September?

Total volume:
$89,863
Volume 24h:
$2,199
72%
Liquidity:
$203,776
9%
Open interest:
$859
0.68%

1+ Americans

 - Kalshi

1+ Americans - Kalshi

80%

-4.5%

1W

News

Positive

Negative

Neutral

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Aug 22

Aug 23

Aug 24

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Aug 26

Aug 27

Aug 27

Vol.

$24.8

·

Resolves Sep 30, 2026

Time left: 17d:18h:11m

1+ American players to reach the Quarterfinals in the 2026 US Open Men's Singles?

80%chance
Amount

$

Trade on
kalshi

Trade on Kalshi

Join Kalshi and score $25 for your first trade.At 80¢ buys you 125 shares | Odds: 80% Total Payout: $125 | Net Profit: $25 Multiplier: 1.25x | ROI: 25% High Projected APY: 9,128% 17 days to resolution
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Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
Total markets: 14

Description

This event group tracks which company will hold the third-largest market capitalization globally as of the market close on September 30, 2026. The markets cover major technology and energy companies, as well as placeholder entries for unknown contenders.

PredictionHero - Resolution Divergence Alerts (RDA)

Unified Resolution Criteria (Consistent across platforms)

All markets resolve identically based on the same market capitalization ranking source and datePrimary resolution logic: Consensus of Bloomberg, Yahoo Finance, and Reuters

Core resolution logic:

  • Market resolves based on closing market capitalization rankings on September 30, 2026
  • Only companies with publicly available market cap data qualify
  • Ranking determined by consensus of major financial data providers

Edge cases & clarifications:

  • Tie Breaker: In case of a tie in market cap, the company with the higher stock price at market close wins
  • Delisted Companies: If a company delists before September 30, 2026, its last reported market cap before delisting determines its ranking
Timing: Resolves after market close on September 30, 2026Our PredictionHero Resolution Divergence Alerts (RDA) are there to help users identify potential differences across platforms. They do not replace or supersede the official rules and description of any prediction market. Users are solely responsible for reviewing and understanding the applicable rules and resolution criteria before placing any trade or bet. If you notice a potential inconsistency, discrepancy, or error in an alert, please report it to our team so we can review and improve the accuracy of our data.
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Polymarket

This market will resolve to the third-largest company in the world by market cap on September 30, 2026, as of market close. The resolution source for this market will be a consensus of credible reporting.

Kalshi

The event evaluates whether a specified number of American players advance to the Quarterfinals in the 2026 US Open Men's Singles tournament. Each market corresponds to an increasing threshold of American participants reaching this stage, ranging from one or more Americans to five or more Americans. All outcomes rely on official nationality classifications provided by the tournament's governing body. Kalshi explicitly disclaims any formal affiliation with or endorsement by the governing league, and all associated trademarks remain the property of their respective owners. The resolution of each market depends solely on the final tournament results and the corresponding nationality data.

Frequently asked questions

The dashboard for the 3rd largest company market aggregates data from multiple venues, showing real-time odds, volume of $67,758, and 24-hour volume at $541. It provides a consensus view of market expectations, highlighting how traders across platforms price the likelihood of different firms claiming the third spot by the end of September. This unified display helps users monitor shifts in sentiment and compare activity between markets.

On Polymarket, odds reflect collective trader sentiment and can diverge from traditional analyst forecasts, which often incorporate fundamental analysis and qualitative judgment. Prediction markets may price in recent news or macro trends faster than slower-moving reports. For this market, the gap between the two can signal emerging consensus or dissent among experts, offering a complementary view to published research.

Differences in user bases, liquidity, and trading mechanics can cause Polymarket and Kalshi to price this market differently. Polymarket and Kalshi can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. For example, regional participation patterns or varying market designs may lead to distinct probability assessments. Currently, Polymarket favors Will Alphabet be the third-largest company in the world by market cap on September 30? at 65.5%, while Kalshi leans toward 1+ American players to reach the Quarterfinals in the 2026 US Open Men's Singles? at 80.0%, reflecting these platform-specific dynamics.

This market resolves around Sep 30, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The result will reflect the clear ranking of companies by market capitalization at that specific close, based on widely accepted financial data sources.

Key signals include major earnings reports, market-wide shocks, mergers or acquisitions that shift capital structures, and macroeconomic announcements affecting valuation multiples. Any development that alters investor perception of the competitive standing among top firms can cause rapid re-pricing in this market as traders adjust probabilities ahead of the September deadline.