FirstEnergy Corp. (FE) announced that it will sell a 30% interest in its subsidiary FirstEnergy Transmission LLC (FET) to Brookfield Super-Core Infrastructure Partners for $3.5 billion, pending regulatory approvals. We expect that management will use the proceeds in a credit supportive manner. Therefore, we revised our outlook on FE and subsidiaries FET, American Transmission Systems Inc. (ATSI), Trans-Allegheny Interstate Line Co. (TrAIL), Mid-Atlantic Interstate Transmission LLC (MAIT), Ohio Edison Co., Toledo Edison Co., Pennsylvania Electric Co., Metropolitan Edison Co., Pennsylvania Power Co., West Penn Power Co., Jersey Central Power&Light Co. (JCP&L), Cleveland Electric Illuminating Co. (CEI), and Allegheny Generating Co. (AGC) to positive from stable. We affirmed all ratings. We affirmed our ratings on Monongahela Power Co. (MP)