Company: AILIM
Filing Date: 2025-11-06
Form Type: 10-Q
Source: 0001002910-25-000129
Chunk: 29

Company: Ameren Illinois Co
Filing Date: 2025-11-06
Form: 10-Q
Item: Part I, Item 2
Chunk 29
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 $11 million increase in the allowance for equity funds used during construction in the nine months ended September 30, 2025, largely at Ameren Illinois Transmission.

Interest Charges

Increase by SegmentOverall Ameren Increase of $35 Million (QTD YoY)Overall Ameren Increase of $78 Million (YTD YoY)Total by Segment

Ameren MissouriAmeren Illinois Natural GasOther/Intersegment EliminationsAmeren Illinois Electric DistributionAmeren Transmission

See Note 3 – Short-term Debt and Liquidity under Part I, Item 1, of this report and the Long-term Debt and Equity section below for additional information on short-term borrowings and long-term debt, respectively, discussed below.

Ameren

Interest charges increased $35 million and $78 million in the three and nine months ended September 30, 2025, respectively, compared with the year-ago periods. In addition to changes by segments discussed below, interest charges increased $9 million and $42 million respectively, at Ameren (parent), because of increased levels of short-term borrowings that increased interest charges by $3 million and $29 million, respectively. Additionally, interest charges increased $8 million and $15 million, respectively, at Ameren (parent), 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