I do not have an ownership interest in the oil field.

Equity value accounts for all the ownership interest in a firm including the value of unexercised stock options and securities convertible to equity.

First, if a firm acquires an ownership interest in another firm, how do we determine the nationality of either the acquiring or acquired firms?

Commentators on news stories involving stocks are often required to disclose any ownership interest in those corporations or in its competitors.

Tribune initially held an 12.5% ownership interest in the network at its launch, and later increased its stake to 22%.