I'm afraid that's not right. It's the other way around. The market cap is the equity value, i.e. just the portion owned by shareholders. The portion owned by de

I'm afraid that's not right. It's the other way around. The market cap is the equity value, i.e. just the portion owned by shareholders. The portion owned by debt holders is the debt (though you should reduce that by the amount of cash on the balance sheet, since it can be used to pay off part of the debt. I left it out for simplicity as it doesn't change the answer). Enterprise value (the value of all of Boeing) is the sum of the two (plus or minus other things like minority interest and whatnot, also left out for simplicity)