Filed by FirstEnergy Corp.
Pursuant to Rule 425 under the Securities Act of 1933
and deemed filed pursuant to Rule 14a-12
of the Securities Exchange Act of 1934, as amended

Subject Company: Allegheny Energy, Inc.
Commission File No: 001-00267

On March 24, 2010, FirstEnergy Corp. and Allegheny Energy, Inc. established a new joint website containing publicly available information about their previously announced proposed merger. Attached are screen shots of this joint website, accessible at www.firstenergycorp.com/alleghenymerger.