Support services agreement, optional termination period

[Table of Co](#i2c056a9f8317485ea6601862f5b0559f_7)[ntents](#i2c056a9f8317485ea6601862f5b0559f_7)Capacity Supply AgreementsIn procurement events in 2021, Ameren Missouri contracted to supply a portion of Ameren Illinois’ capacity requirements for $2 million from June 2022 through May 2023.Energy Product AgreementsBased on the outcome of IPA-administered procurement events, Ameren Missouri and Ameren Illinois have entered into energy product agreements by which Ameren Missouri agreed to sell, and Ameren Illinois agreed to purchase, a set amount of MWhs at a predetermined price over a specified period of time. The following table presents the specified performance period, price, and amount of MWhs included in the agreements:

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| IPA Procurement Event | Performance Period | MWh |  | Average Price per MWh |
| April 2017 | March 2019 – May 2020 | 85,600 |  | $ | 34  |  |
| April 2018 | June 2019 – September 2020 | 110,000 |  | 32  |  |
| April 2019 | January 2020 – December 2021 | 288,000 |  | 35  |  |
| September 2019 | April 2020 – November 2021 | 170,800 |  | 29  |  |
| September 2020 | September 2021 – November 2022 | 204,800 |  | 31  |  |
| April 2021 | July 2022 – November 2022 | 33,600 |  | 34  |  |
| September 2021 | January 2022 – September 2023 | 136,000 |  | 37  |  |

Collateral PostingsUnder the terms of the Illinois energy product agreements entered into through RFP processes administered by the IPA, suppliers must post collateral under certain market conditions to protect Ameren Illinois in the event of nonperformance. The collateral postings are unilateral, which means that only the suppliers can be required to post collateral. Therefore, Ameren Missouri, as a winning supplier in the RFP process, may be required to post collateral. As of December 31, 2021 and 2020, there were no collateral postings required of Ameren Missouri related to the Illinois energy product agreements.Interconnection AgreementsAmeren Missouri and Ameren Illinois are parties to an interconnection agreement that governs the connection of their respective transmission lines and other facilities used for the distribution of power. These agreements have no contractual expiration date, but may be terminated by either party with three years’ notice.Ameren Missouri and ATXI are parties to an interconnection agreement that governs the connection of the High Prairie Renewable Energy Center to an ATXI transmission line that allows Ameren Missouri to distribute power generated from the High Prairie Renewable Energy Center. See Note 15 – Supplemental Information for further information on the acquisition of the High Prairie Renewable Energy Center.Support Services AgreementsAmeren Services provides support services to its affiliates. The costs of support services including wages, employee benefits, professional services, and other expenses, are based on, or are an allocation of, actual costs incurred. The support services agreement can be terminated at any time by the mutual agreement of Ameren Services and that affiliate or by either party with 60 days’ notice before the end of a calendar year.In addition, Ameren Missouri and Ameren Illinois provide affiliates with access to their facilities for administrative purposes and with use of other assets. The costs of the rent and facility services and other assets are based on, or are an allocation of, actual costs incurred.Ameren Missouri and Ameren Illinois also provide storm-related and miscellaneous support services to each other on an as-needed basis.At December 31, 2021, Ameren Missouri and Ameren Illinois had long-term receivables included in “Other assets” from Ameren Services of $77 million and $80 million, respectively, related to Ameren Services’ allocated portion of Ameren’s pension and postretirement benefit plans.Transmission ServicesAmeren Missouri and Ameren Illinois receives transmission services from ATXI for their retail load.145
