The headline is misleading, but they immediately follow up with a qualification that makes the headline technically not wrong. They're saying just market value

The headline is misleading, but they immediately follow up with a qualification that makes the headline technically not wrong. They're saying just market value of the equity. That can be very different from market value of the enterprise, which includes the market value of all financing: debt as well as equity. The metric they're using is not necessarily a meaningful way to rank the "biggest," or even "most valuable" auto making operations.