Notwithstanding the extensive discussion in legal writing and case law debating the question of corporations as “persons,” for purposes of virtually all writing a company, organization, agency, and so forth, is not “treated” as a person.
Therefore, you would write, Exxon claims that its [not “their”] profits should not be subject to a windfall profits tax.
This is one of my pet peeves, that is, it involves an edit that I will never fail to make.
A trade secret: All editors have their lists of unforgivable transgressions, which are not technically wrong. Without naming names, I know an editor who always changes towards to toward. Imagine that!