The following table presents the impact on Ameren Missouri and Ameren Illinois of related-party transactions for the three and six months ended June 30, 2026 and 2025: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months | | Six Months | | Agreement | Income Statement
Line Item | | | Ameren
Missouri | | Ameren
Illinois | | Ameren
Missouri | | Ameren
Illinois | | | | | | | | | | | | | | | | | | | | | | | | Ameren Missouri and Ameren Illinois | Operating Revenues | 2026 | $ | 11 | | $ | (a) | $ | 21 | | $ | (a) | rent and facility services | | 2025 | | 8 | | | 1 | | | 15 | | | 1 | | | Ameren Illinois interconnection agreement | Operating Revenues | 2026 | | (b) | | (a) | | (b) | | (a) | | with Ameren Missouri | | 2025 | | (b) | | (a) | | (b) | | (a) | | Ameren Missouri and Ameren Illinois miscellaneous | Operating Revenues | 2026 | $ | 2 | | $ | 1 | | $ | 2 | | $ | 1 | | | support services | | 2025 | | (a) | | 3 | | | (a) | | 5 | | | Total Operating Revenues | | 2026 | $ | 13 | | $ | 1 | | $ | 23 | | $ | 1 | | | | 2025 | | 8 | | | 4 | | | 15 | | | 6 | | | | | | | | | | | | | | | | | | | | | | | | | Ameren Missouri and Ameren Illinois | Purchased Power | 2026 | $ | 3 | | $ | 1 | | $ | 5 | | $ | 2 | | | transmission services from ATXI | | 2025 | | 2 | | | 1 | | | 5 | | | 1 | | | Ameren Missouri interconnection agreement | Purchased Power | 2026 | | (a) | | (b) | | (a) | | (b) | | with Ameren Illinois | | 2025 | | (a) | | (b) | | (a) | | (b) | | Total Purchased Power | | 2026 | $ | 3 | | $ | 1 | | $ | 5 | | $ | 2 | | | | 2025 | | 2 | | | 1 | | | 5 | | | 1 | | | Ameren Missouri and Ameren Illinois | Other Operations and Maintenance | 2026 | $ | (a) | $ | (a) | $ | (a) | $ | (a) | rent and facility services | | 2025 | | (a) | | 2 | | | (a) | | 3 | | | Ameren Services support services | Other Operations and Maintenance | 2026 | $ | 48 | | $ | 46 | | $ | 96 | | $ | 90 | | agreement | | 2025 | | 44 | | | 40 | | | 88 | | | 80 | | | Total Other Operations and | | 2026 | $ | 48 | | $ | 46 | | $ | 96 | | $ | 76 | | | Maintenance | | 2025 | | 44 | | | 42 | | | 88 | | | 83 | | | 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) | $ | (2) | | $ | (a) | | | 2025 | | (1) | | | (a) | | (1) | | | (a) |
(a)Amount less than $1 million. (b)Not applicable.
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