Company: AILIM
Filing Date: 2025-11-06
Form Type: 10-Q
Source: 0001002910-25-000129
Chunk: 20

Company: Ameren Illinois Co
Filing Date: 2025-11-06
Form: 10-Q
Item: Part I, Item 2
Chunk 20
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— (3)Other(3)— — — — (3)Cost recovery mechanisms – offset in electric revenue(b)(19)201 — — (33)149 Total fuel and purchased power change$742 $201 $— $— $(33)$910 

(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 nine months ended September 30, 2025, activity in Other/Intersegment Eliminations of $10 million and $33 million, respectively, was primarily due to the changes in Ameren Transmission revenue from transmission services provided to Ameren Illinois Electric Distribution (-$11 million and -$33 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.

56

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 $269 million, or 54%, and $910 million, or 79%, for the three and nine months ended September 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 $153 million, or 46%, and $742 million, or 108%, for the three and nine months ended September 30, 2025, respectively, compared with the year-ago periods.

The following items increased Ameren Missouri’s fuel and purchased power expenses for the three and nine months ended September 30, 2025:

•Energy costs increased $148 million and $750 million, respectively, primarily due to summer capacity prices increasing from $30 per MW-day in 2024 to $667 per MW-day in 2025 pursuant to the April 2025 annual MISO capacity