FORM 10K DATED DECEMBER 31, 2006

Company

FIRSTENERGY CORP

Filed

February 28, 2007

Period of Report

December 31, 2006

Accession Number

0000040779-07-000024

A 10-K is a company's comprehensive annual report, required by the SEC. It includes audited financial statements, a description of the business, risk factors, and management's discussion of results. Learn more about 10-K filings →