While a few are mainstays from recent years, most of the most highly valued private companies recently burst onto the scene.

One-fifth of the companies on this year’s list have ranked among America’s top private corporations for all four decades including Fidelity, Hallmark and Purdue. Still there are a dozen newcomers ...

Tech companies, including Meta, are announcing mass layoffs to focus on AI investments, impacting over 73,000 workers this year. The shift reflects growing confidence in AI's capabilities.