RELATED PARTY TRANSACTIONS

The Ameren Companies have engaged in, and may in the future engage in, affiliate transactions in the normal course of business. These transactions primarily consist of natural gas and power purchases and sales, services received or rendered, and borrowings and lendings. Transactions between affiliates are reported as intercompany transactions on their financial statements, but are eliminated in consolidation for Ameren’s financial statements. Below are the material related party agreements.

Electric Power Supply Agreements

Capacity Supply Agreements

Ameren Illinois must acquire capacity sufficient to meet its obligations to customers. Ameren Illinois uses periodic RFP processes that are administered by the IPA to contract capacity on behalf of its customers. Ameren Missouri participates in the RFP process and has been a winning supplier for certain periods. In 2010, Ameren Missouri contracted to supply a portion of Ameren Illinois’ capacity requirements for less than $1 million for the period from June 1, 2010, through May 31, 2013. In 2012, Ameren Missouri contracted to supply a portion of Ameren Illinois' capacity requirements for $1 million and $3 million for the 12 months ending May 31, 2014, and 2015, respectively.

Energy Swaps and Energy Products

Ameren Illinois must acquire energy sufficient to meet its obligations to customers.

In 2011, Ameren Illinois used an RFP process, administered by the IPA, to procure energy products that settled physically from June 1, 2011, through May 31, 2014. Ameren Missouri was among the winning suppliers in the energy product RFP process. In 2011, Ameren Missouri and Ameren Illinois entered into energy product agreements by which Ameren Missouri agreed to sell and Ameren Illinois agreed to purchase approximately 16,800 megawatthours at approximately $37 per megawatthour during the 12 months ended May 31, 2012, approximately 40,800 megawatthours at approximately $29 per megawatthour during the 12 months ended May 31, 2013, and approximately 40,800 megawatthours at approximately $28 per megawatthour during the 12 months ended May 31, 2014. The energy product agreements between Ameren Missouri and Ameren Illinois for the periods ended May 31, 2012, and May 31, 2013, were for off-peak hours only.

In 2014, Ameren Illinois used an RFP process, administered by the IPA, to procure energy products that will settle physically from December 1, 2014, through May 31, 2017. Ameren Missouri was among the winning suppliers in the energy product RFP process. As a result, Ameren Missouri and Ameren Illinois entered into energy product agreements by which Ameren Missouri agreed to sell and Ameren Illinois agreed to purchase approximately 168,400 megawatthours at approximately $51 per megawatthour during the period of January 1, 2015, through February 28, 2017.

Interconnection and Transmission Agreements

Ameren Missouri and Ameren Illinois are parties to an interconnection agreement for the use of their respective transmission lines and other facilities for the distribution of power. These agreements have no contractual expiration date, but may be terminated by either party with three years’ notice.

Joint Ownership Agreement

ATXI and Ameren Illinois have a joint ownership agreement to construct, own, operate, and maintain certain electric transmission assets in Illinois. Under the terms of this agreement, Ameren Illinois and ATXI are responsible for their applicable share of all costs related to the construction, operation, and maintenance of electric transmission systems. Currently, there are no construction projects or joint ownership of existing assets under this agreement.

Support Services Agreements

Ameren 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. A shared services support 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, primarily Ameren Services, with access to their facilities for administrative purposes. The cost of the rent and facility services are based on, or are an allocation of, actual costs incurred.

Separately, Ameren Missouri and Ameren Illinois provide storm-related and miscellaneous support services to each other on an as-needed basis.

Transmission Services

Ameren Illinois takes transmission service from MISO for the retail load it serves in the AMIL pricing zone. ATXI is one of the transmission owners in the AMIL pricing zone. Accordingly ATXI receives transmission payments from Ameren Illinois through the MISO billing process.

Money Pool

See Note 4 – Short-term Debt and Liquidity and Note 5 – Long-term Debt and Equity Financings for a discussion of affiliate borrowing arrangements.

Collateral Postings

Under the terms of the Illinois power procurement 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, meaning 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, 2014 and 2013, there were no collateral postings required of Ameren Missouri related to the Illinois power procurement agreements.

Tax Allocation Agreement

See Note 1 – Summary of Significant Accounting Policies for a discussion of the tax allocation agreement. At December 31, 2014, Ameren Missouri and Ameren Illinois had an intercompany receivable balance with Ameren (parent) of $58 million and $15 million, respectively, related to the tax allocation agreement.

The following table presents the impact on Ameren Missouri and Ameren Illinois of related party transactions for the years ended December 31, 2014, 2013, and 2012. It is based primarily on the agreements discussed above and the money pool arrangements discussed in Note 4 – Short-term Debt and Liquidity.



Agreement	Income Statement Line Item			Ameren Missouri		Ameren Illinois
Ameren Missouri power supply agreements	Operating Revenues	2014	$	5	$	(a)
with Ameren Illinois		2013		3		(a)
		2012		(b)		(a)
Ameren Missouri and Ameren Illinois	Operating Revenues	2014		21		2
rent and facility services		2013		21		1
		2012		19		1
Ameren Missouri and Ameren Illinois	Operating Revenues	2014		1		(b)
miscellaneous support services		2013		1		3
		2012		1		(b)
Total Operating Revenues		2014	$	27	$	2
		2013		25		4
		2012		20		1
Ameren Illinois power supply	Purchased Power	2014	$	(a)	$	5
agreements with Ameren Missouri		2013		(a)		3
		2012		(a)		(b)
Ameren Illinois transmission	Purchased Power	2014		(a)		2
services with ATXI		2013		(a)		2
		2012		(a)		3
Total Purchased Power		2014	$	(a)	$	7
		2013		(a)		5
		2012		(a)		3
Ameren Services support services	Other Operations and	2014	$	124	$	109
agreement	Maintenance	2013		116		93
		2012		106		88
Insurance premiums^(c)	Other Operations and	2014		(b)		(a)
	Maintenance	2013		(b)		(a)
		2012		(b)		(a)
Total Other Operations and		2014	$	124	$	109
Maintenance Expenses		2013		116		93
		2012		106		88
Money pool borrowings (advances)	Interest (Charges)	2014	$	(b)	$	(b)
	Income	2013		(b)		(b)
		2012		(b)		(b)


(a)	Not applicable.


(b)	Amount less than $1 million.


(c)	Represents insurance premiums paid to Missouri Energy Risk Assurance Company LLC, an affiliate, for replacement power.