Company: AILIM
Filing Date: 2025-05-05
Form Type: 10-Q
Source: 0001002910-25-000098
Chunk: 13

Company: Ameren Illinois Co
Filing Date: 2025-05-05
Form: 10-Q
Item: Part I, Item 2
Chunk 13
---
 and increased capital investment (+$3 million).

46

•Revenues associated with “Cost recovery mechanisms – offset in fuel and purchased power” increased $20 million due to increased purchased power expenses recovered from customers. The increase in electric revenues are fully offset by an increase in purchased power expenses under cost recovery mechanisms for purchased power, as discussed below.

•Other cost recovery mechanisms increased revenues by $13 million, primarily due to a higher amount of bad debt costs included in customer rates pursuant to the associated rider.

•Revenues increased $5 million due to the recovery 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