The Supreme Court today ruled that corporations do not have personal privacy rights under FOIA Exemption 7(C). The ruling can be found here.
The issue was in a case brought by AT&T, whether a corporation could be considered a person pursuant to Exemption 7(C) and therefore be provided "privacy" rights for its information under the exemption. Chief Justice Roberts wrote the opinion, which was unanimous 8-0 decision (Justice Kagan did not participate in the proceedings). The Court, in a decision which is as much a grammer lesson as a FOIA issue, found that corporations are not the same as humans pursuant to Exemption 7(C) and do not have privacy for corporate material under the exemption.
Update: Here's a breakdown of the issue from DailyKos.