Company: AILIM
Filing Date: 2025-05-05
Form Type: 10-Q
Source: 0001002910-25-000098
Chunk: 113

Company: Ameren Illinois Co
Filing Date: 2025-05-05
Form: 10-Q
Item: Part I, Item 1
Chunk 113
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 of and return on increased energy-efficiency program investments under performance-based formula ratemaking.

•Other revenues increased $5 million primarily due to mutual assistance provided to Ameren Missouri for major storms experienced throughout its service territory in January and March 2025.

Ameren Illinois Transmission

Ameren Illinois Transmission’s revenues increased $23 million, or 18%, for the three months ended March 31, 2025, compared with the year-ago period. Base rate revenues were favorably affected by higher recoverable expenses (+$19 million) and increased capital investment (+$4 million), as evidenced by a 7% increase in rate base used to calculate the revenue requirement. 

Natural Gas Revenues

Ameren

Ameren’s natural gas revenues increased $23 million, or 5%, for the three months ended March 31, 2025, compared with the year-ago period, due to increased revenues at Ameren Illinois Natural Gas and Ameren Missouri, as discussed below. 

Ameren Missouri

Ameren Missouri’s natural gas revenues increased $3 million, or 5%, for the three months ended March 31, 2025, compared with the year-ago period, primarily due to colder winter temperatures.

Ameren Illinois Natural Gas

Ameren Illinois Natural Gas’ revenues increased $20 million, or 5%, for the three months ended March 31, 2025, compared with the year-ago period. “Cost recovery mechanisms – offset in natural gas purchased for resale” increased revenues $16 million for the three months ended March 31, 2025, due to a higher collection of natural gas costs previously deferred under the PGA. The increase in natural gas revenues under the PGA are fully offset by an increase in natural gas purchased for resale expenses.

Fuel and Purchased Power

The following table presents the increases (decreases) by Ameren segment for fuel and purchased power for the three months ended March 31, 2025, compared with the year-ago period:

Three MonthsAmeren MissouriAmeren IllinoisElectric DistributionAmeren IllinoisNatural GasAmeren TransmissionOther /Intersegment EliminationsAmerenFuel and purchased power change:Energy costs (excluding the estimated effect of weather)$165 $— $— $— $— $165 Retail sales volume (excluding the estimated effect of weather)(2)— — — — (2)Effect of weather