Company: AILIM
Filing Date: 2025-11-06
Form Type: 10-Q
Source: 0001002910-25-000129
Chunk: 145

Company: Ameren Illinois Co
Filing Date: 2025-11-06
Form: 10-Q
Item: Part I, Item 1
Chunk 145
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million in the three and nine months ended September 30, 2025, respectively, compared with the year-ago periods, primarily due to the following items:

Ameren Illinois Electric Distribution

Other operations and maintenance expenses increased $8 million and $41 million in the three and nine months ended September 30, 2025, respectively, primarily due to the following items (except where a specific period is referenced):

•Increased costs of $6 million and $11 million, respectively, resulting from compliance with new and expanding programs under CEJA.

•Bad debt costs on accounts receivables increased $10 million in the nine months ended September 30, 2025, primarily because of a higher base level of expenses included in customer rates pursuant to the associated rider.

•Increased costs associated with customer energy-efficiency investments under formula ratemaking of $3 million and $9 million, respectively, primarily due to amortization of regulatory assets.

•Increased expense of $4 million and $7 million, respectively, for cloud-related software.

•Distribution expenditures increased $3 million and $7 million, respectively, primarily due to higher levels of pole inspections and other maintenance activity.

•Injuries and damages increased $3 million and $5 million, respectively, primarily due to an increase in claims compared to the year-ago period.

The above increases in the three and nine months ended September 30, 2025, compared with the year-ago periods, were partially offset by the following items (except where a specific period is referenced):

•Bad debt costs on purchased receivables decreased $5 million and $11 million, respectively, primarily because of a lower base level of expenses included in customer rates pursuant to the associated rider.

•Reduction in environmental remediation rider costs of $3 million and $7 million, respectively.

•Bad debt costs on accounts receivables decreased $7 million in the three months ended September 30, 2025, primarily because of a lower base level of expenses included in customer rates, effective June 2025, pursuant to the associated rider.

Ameren Illinois Natural Gas

Other operations and maintenance expenses were comparable between periods.

Ameren Illinois Transmission

Other operations and maintenance expenses were comparable between periods.

60

Depreciation and Amortization Expenses

Increase (Decrease) by SegmentOverall Ameren Increase of $27 Million (QTD YoY)Overall Ameren Increase of $43 Million