...- FirstEnergy Corp. (FE) recently closed the sale of a 30% minority interest in subsidiary FirstEnergy Transmission LLC (FET) to Brookfield Super-Core Infrastructure Partners for $3.5 billion. We expect management to use proceeds in a credit-supportive manner, improving FE's consolidated funds from operations (FFO) to debt to consistently above 12%. - We raised the rating on FE to '###' from '###-' and by one notch on most subsidiaries (see ratings list): FET, American Transmission Systems Inc. (ATSI), Trans-Allegheny Interstate Line Co. (TrAIL), Mid-Atlantic Interstate Transmission LLC (MAIT), FirstEnergy Pennsylvania Electric Co. (FE-PA), Ohio Edison Co., Toledo Edison Co., and Allegheny Generating Co. (AGC). Furthermore, we completed our review of AGC under our new Sector-Specific Corporate Methodology, published April 4, 2024, and removed our issuer credit rating on the entity from under criteria observation. - We affirmed our ratings on Monongahela Power Co. (MP), Potomac Edison Co....