Company: AILIM
Filing Date: 2025-08-04
Form Type: 10-Q
Source: 0001002910-25-000112
Chunk: 21

Company: Ameren Illinois Co
Filing Date: 2025-08-04
Form: 10-Q
Item: Part I, Item 2
Chunk 21
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 summer capacity prices that were set by annual MISO auctions. See Outlook for additional information related to the April 2024 and April 2025 MISO auctions. Ameren Missouri’s 5% exposure to net energy cost variances under the FAC is the difference between “Off-system sales, capacity, transmission, and FAC revenues, net” in electric revenues and “Energy costs (excluding the estimated effect of weather)”. These results had an immaterial impact on earnings between periods.

•Transmission service charges (not included in the FAC) increased $2 million and $5 million, respectively, due to higher transmission rates related to increased revenue requirements of other MISO transmission operators.

•Fuel and purchased power expenses increased an estimated $4 million for the six months ended June 30, 2025, due to an increase in electric retail sales as a result of colder winter temperatures.

The following items decreased Ameren Missouri’s fuel and purchased power expense for the three and six months ended June 30, 2025, compared with the year-ago periods (except where a specific period is referenced):

•“Cost recovery mechanisms — offset in electric revenue” decreased $6 million and $18 million, respectively, due to decreased amortization of costs previously deferred under the FAC. The changes to “Cost recovery mechanisms - offset in electric revenue” are fully offset by “Cost recovery mechanisms - offset in fuel and purchased power” in electric revenues.

•Fuel and purchased power expenses decreased an estimated $4 million for the three months ended June 30, 2025 due to a decrease in electric retail sales as a result of milder spring and early summer temperatures.

Ameren Illinois Electric Distribution

Ameren Illinois Electric Distribution’s purchased power expenses increased $55 million, or 33%, and $75 million, or 21%, for the three and six months ended June 30, 2025, respectively, compared with the year-ago periods, primarily due to higher summer capacity prices that were set by annual MISO auctions (+$43 million and +$41 million, respectively). See Outlook for additional information related to the April 2024 and April 2025 MISO auctions. In addition to higher capacity prices, increases in transmission service charges (+$15 million and 

+$26 million, respectively), volumes (+$7 million and +$23 million, respectively), primarily due to residential and small commercial customers switching from alternative retail electric suppliers to Ameren Illinois’ supplied power, and other power riders