Company: AILIM
Filing Date: 2025-08-04
Form Type: 10-Q
Source: 0001002910-25-000112
Chunk: 138

Company: Ameren Illinois Co
Filing Date: 2025-08-04
Form: 10-Q
Item: Part I, Item 1
Chunk 138
---
— (23)34 Total fuel and purchased power change$589 $75 $— $— $(23)$641 

(a)Represents the estimated variation resulting primarily from changes in cooling and heating degree-days on electric demand compared with the year-ago periods; this variation is based on temperature readings from the National Oceanic and Atmospheric Administration weather stations at local airports in our service territories.

(b)“Cost recovery mechanisms — offset in electric revenue” changes are offset by corresponding changes in “Cost recovery mechanisms — offset in fuel and purchased power” in electric revenues. For the three and six months ended June 30, 2025, activity in Other/Intersegment Eliminations of $13 million and $23 million, respectively, was due primarily to the changes in Ameren Transmission revenue from transmission services provided to Ameren Illinois Electric Distribution (-$13 million and -$22 million, respectively). See Note 14 – Segment Information under Part I, Item 1, of this report for additional information on intersegment eliminations. These items have no overall impact on earnings.

54

Ameren

Ameren Missouri and Ameren Illinois are generally allowed to pass on to customers prudently incurred costs for fuel and purchased power. Ameren’s electric fuel and purchased power expenses increased $467 million, or 143%, and $641 million, or 98%, for the three and six months ended June 30, 2025, respectively, compared with the year-ago periods, primarily due to increased fuel and purchased power expenses at Ameren Missouri and Ameren Illinois Electric Distribution, as discussed below. 

Ameren Missouri

Ameren Missouri’s fuel and purchased power expenses increased $425 million, or 225%, and $589 million, or 166%, for the three and six months ended June 30, 2025, compared with the year-ago periods.

The following items increased 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):

•Energy costs increased $437 million and $602 million, respectively, primarily due to higher spring and 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