Could there be a $10 trillion company? Tech investing star Laffont believes so.

It's only a matter of time before the world gets its first $10 trillion company, according to celebrated hedge fund manager and tech investor Philippe Laffont. For the Coatue Management founder, it comes down to simple math. The largest U.S. companies today – Nvidia , Apple and Google – are each between 3% and 4% of total global market capitalization, which is roughly $120 trillion. Assuming the global economy grows to $200 trillion over the next 15 years, and assuming the largest company at that time can increase its share of total market capitalization to 5%, that company would be worth about $10 trillion, the MIT graduate said on CNBC's Squawk Box . The real question for Laffont is whether that company will be an already established company or one of the newcomers to global equity markets that are shaking up major indexes. "Which one could it be?" he asked Tuesday. "What's fun for me and what keeps me going is to imagine this index of the future and who's going to be in that ... If you can do that and stomach the daily volatility like today, then you should be able to do well." Equity markets are currently experiencing a reshuffle in the mega-cap stocks, and that might eventually produce a $10 trillion behemoth. SpaceX debuted on the Nasdaq earlier this month at a valuation of $1.77 trillion. Forthcoming initial public offerings from OpenAI and Anthropic are expected to reach valuations close to $1 trillion each. …