The $1 trillion market-cap threshold is a considerable hurdle few companies cross. Only five companies are currently valued at more than $1 trillion, but what others are slated to cross this threshold in the next 10 years?

The first step is to establish realistic expectations, as the long-term annual return of the market is around 10%. Many companies exceed this return level, but few can do it consistently over a decade. Because of that, we'll set our 10-year return maximum at 15%. That means a company must be worth at least $247 billion today if it hopes to be worth more than $1 trillion within a decade.

While there will always be outliers that could blow this prediction out of the water, only 36 companies worldwide are worth at least $247 billion as of May 16. So of those 36, which ones can cross into the $1 trillion club? Let's find out.

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Source Fool.com