The following table presents the impact on Ameren Missouri and Ameren Illinois of related-party transactions for the three and nine months ended September 30, 2026 and 2025: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months | | Nine Months | | Agreement | Income Statement
Line Item | | | Ameren
Missouri | | Ameren
Illinois | | Ameren
Missouri | | Ameren
Illinois | | | | | | | | | | | | | | | | | | | | | | | | Ameren Missouri and Ameren Illinois | Operating Revenues | 2026 | $ | 11 | | $ | (a) | $ | 32 | | $ | (a) | rent and facility services | | 2025 | | 8 | | | (a) | | 23 | | | 1 | | | Ameren Illinois interconnection agreement | Operating Revenues | 2026 | | (b) | | 1 | | | (b) | | 1 | | | with Ameren Missouri | | 2025 | | (b) | | (a) | | (b) | | (a) | | Ameren Missouri and Ameren Illinois miscellaneous | Operating Revenues | 2026 | $ | (a) | $ | 2 | | $ | 2 | | $ | 3 | | | support services | | 2025 | | 1 | | | (a) | | 1 | | | 5 | | | Total Operating Revenues | | 2026 | $ | 11 | | $ | 3 | | $ | 34 | | $ | 4 | | | | 2025 | | 9 | | | (a) | | 24 | | | 6 | | | | | | | | | | | | | | | | | | | | | | | | | Ameren Missouri and Ameren Illinois | Purchased Power | 2026 | $ | 3 | | $ | (a) | $ | 8 | | $ | 2 | | | transmission services from ATXI | | 2025 | | 2 | | | 1 | | | 7 | | | 2 | | | Ameren Missouri interconnection agreement | Purchased Power | 2026 | | 1 | | | (b) | | 1 | | | (b) | | with Ameren Illinois | | 2025 | | (a) | | (b) | | (a) | | (b) | | Total Purchased Power | | 2026 | $ | 4 | | $ | (a) | $ | 9 | | $ | 2 | | | | 2025 | | 2 | | | 1 | | | 7 | | | 2 | | | Ameren Missouri and Ameren Illinois | Other Operations and Maintenance | 2026 | $ | 2 | | $ | 2 | | $ | 2 | | $ | 2 | | rent and facility services | | 2025 | | (a) | | (a) | | (a) | | 3 | | | Ameren Services support services | Other Operations and Maintenance | 2026 | $ | 46 | | $ | 43 | | $ | 142 | | $ | 133 | | agreement | | 2025 | | 42 | | | 39 | | | 130 | | | 119 | | | Total Other Operations and | | 2026 | $ | 48 | | $ | 45 | | $ | 144 | | $ | 135 | | | Maintenance | | 2025 | | 42 | | | 39 | | | 130 | | | 122 | | | Money pool interest (advances) | (Interest Charges)/Other Income, Net | 2026 | $ | (a) | $ | (a) | $ | (a) | $ | (a) | | | 2025 | | (a) | | (a) | | (a) | | (a) | | Long-term debt, net - related parties | (Interest Charges) | 2026 | $ | (1) | | $ | (a) | $ | (3) | | $ | (a) | | | 2025 | | (1) | | | (a) | | (2) | | | (a) |
(a)Amount less than $1 million. (b)Not applicable.
|