Company: AILIM
Filing Date: 2025-11-06
Form Type: 10-Q
Source: 0001002910-25-000129
Chunk: 150

Company: Ameren Illinois Co
Filing Date: 2025-11-06
Form: 10-Q
Item: Part I, Item 1
Chunk 150
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 due to a long-term debt issuance in March 2025 offset by the repayment of a senior unsecured note in September 2024.

Ameren Transmission

Interest charges were comparable between periods.

64

Ameren Missouri

Interest charges increased $23 million and $28 million in the three and nine months ended September 30, 2025, respectively, compared with the year-ago periods. Interest charges increased by $12 million and $37 million, respectively, primarily due to the issuances of long-term debt in April 2024, October 2024, and April 2025. Interest charges also increased by $6 million and $17 million, respectively, due to the December 2024 issuance of securitized utility tariff bonds associated with the retirement of the Rush Island Energy Center, see Note 14 - Commitments and Contingencies under Part II, Item 8, in the Form 10-K for more information. Additionally, the amount of interest charges included in base rates for PISA and RESRAM was updated when new customer rates became effective on June 1, 2025, pursuant to the April 2025 MoPSC electric rate order. Lower deferrals due to the inclusion in base rates of interest associated with certain property, plant, and equipment previously deferred under the PISA and RESRAM increased interest charges by $4 million in the three months ended September 30, 2025. 

The above increases were partially offset by interest charges that reflected a deferral to a regulatory asset of interest associated with investments in eligible property, plant and equipment not yet reflected in rates pursuant to PISA and RESRAM, which decreased interest charges by $22 million in the nine months ended September 30, 2025. 

Ameren Illinois

Interest charges were comparable in the three months ended September 30, 2025, and increased $14 million in the nine months ended September 30, 2025, compared with the year-ago periods, primarily due to the following:

Ameren Illinois Transmission

Interest charges were comparable in the three months ended September 30, 2025, and increased by $6 million in the nine months ended September 30, 2025, compared with the year-ago periods, primarily because of issuances of long-term debt in June 2024 and March 2025, which increased interest expense by $10 million. The increases were partially offset by decreased levels of interest charges associated