Ameren (AEE) 11-K Annual report of employee stock purchases

UNITED STATES

SECURITIES AND EXCHANGE COMMISISION

WASHINGTON, DC 20549

FORM 11-K

☒ ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE FISCAL YEAR ENDED DECEMBER 31, 2016

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                     to                     

COMMISSION FILE NUMBER 1-14756

A. Full title of the plan and the address of the plan, if different from that of the issuer named below:

AMEREN CORPORATION

SAVINGS INVESTMENT PLAN

B. Name of issuer of securities held pursuant to the plan and the address of its principal executive office:

Ameren Corporation

1901 Chouteau Avenue

St. Louis, Missouri 63103

Ameren Corporation

Savings Investment Plan

Financial Statements and Supplemental Schedule

December 31, 2016 and 2015

Ameren Corporation

Savings Investment Plan

Index

Report of Independent Registered Public Accounting Firm December 31, 2016 and 2015	1
Financial Statements
Statements of Net Assets Available for Benefits December 31, 2016 and 2015	2
Statements of Changes in Net Assets Available for Benefits Years Ended December 31, 2016 and 2015	3
Notes to Financial Statements December 31, 2016 and 2015	4-15
Supplemental Schedule*
Schedule H, Line 4i—Schedule of Assets (Held at End of Year) December 31, 2016	1-10

* Other schedules required by 29 CFR 2520.103-10 of the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974 (“ERISA”), as amended, have been omitted because they are not applicable.

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Participants and Administrator of the

Ameren Corporation Savings Investment Plan

St. Louis, Missouri

We have audited the accompanying statements of net assets available for benefits of the Ameren Corporation Savings Investment Plan as of December 31, 2016 and 2015 and the related statements of changes in net assets available for benefits for the years then ended. These financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the net assets available for benefits of the Plan as of December 31, 2016 and 2015 and the changes in net assets available for benefits for the years then ended in conformity with U.S. generally accepted accounting principles.

The supplemental Schedule H, Line 4i – Schedule of Assets (Held at End of Year) as of December 31, 2016 has been subjected to audit procedures performed in conjunction with the audit of the Ameren Corporation Savings Investment Plan’s financial statements. The supplemental schedule is the responsibility of the Plan’s management. Our audit procedures included determining whether the information presented in the supplemental schedule reconciles to the financial statements or the underlying accounting and other records, as applicable, and performing procedures to test the completeness and accuracy of the information presented in the supplemental schedule. In forming our opinion on the supplemental schedule, we evaluated whether the supplemental schedule, including its form and content, is presented in conformity with the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. In our opinion, the supplemental schedule is fairly stated in all material respects in relation to the financial statements as a whole.

/s/ Crowe Horwath LLP

Crowe Horwath LLP

South Bend, Indiana

June 23, 2017

1

Ameren Corporation

Savings Investment Plan

Statements of Net Assets Available for Benefits

December 31, 2016 and 2015

	2016		2015
Assets
Investments, at fair value	$	1,794,642,191	$	1,644,525,649
Investments, at contract value		299,821,780		283,716,698
Total investments		2,094,463,971		1,928,242,347
Cash		1,807,150		(34,858	)
Receivables
Notes receivable from participants		34,530,404		34,637,440
Participant contributions		1,078,010		1,507,524
Employer contributions		322,437		513,140
Dividends and interest		458,599		577,701
Due from brokers for securities sold		6,534,911		10,661,338
Total receivables		42,924,361		47,897,143
Total assets		2,139,195,482		1,976,104,632
Liabilities
Accrued expenses		340,926		391,501
Due to brokers for securities purchased		14,236,300		9,762,293
Total liabilities		14,577,226		10,153,794
Net assets available for benefits	$	2,124,618,256	$	1,965,950,838

The accompanying notes are an integral part of these financial statements.

2

Ameren Corporation

Savings Investment Plan

Statements of Changes in Net Assets Available for Benefits

Years Ended December 31, 2016 and 2015

	2016		2015
Additions:
Investment income/(loss)
Interest and dividends	$	22,418,798	$	24,706,214
Net appreciation/(depreciation) in fair value of investments		157,034,429		(37,457,301	)
Total investment income/(loss)		179,453,227		(12,751,087	)
Interest on notes receivable from participants		1,390,534		1,405,566
Participant contributions		83,371,122		81,725,541
Employer contributions		29,197,593		29,153,939
Total additions		293,412,476		99,533,959
Deductions:
Benefits paid to participants		131,144,664		153,600,149
Administrative expenses		3,600,394		3,267,792
Total deductions		134,745,058		156,867,941
Net increase/(decrease)		158,667,418		(57,333,982	)
Net assets available for benefits
Beginning of year		1,965,950,838		2,023,284,820
End of year	$	2,124,618,256	$	1,965,950,838

The accompanying notes are an integral part of these financial statements.

3

Ameren Corporation

Savings Investment Plan

Notes to Financial Statements

December 31, 2016 and 2015

1. Description of the Plan

General

The following is a summary of the various provisions of the Ameren Corporation Savings Investment Plan (the “Plan”). Participants should refer to the Plan document for more complete information.

The Plan is a defined contribution plan. Its purpose is to provide employees eligible to participate (the “Participants”) of Ameren Corporation (the “Company”) and its wholly owned subsidiaries the option to defer a portion of their compensation for federal income tax purposes in accordance with Section 401(k) of the Internal Revenue Code (the “Code”). The Plan is subject to certain provisions of the Employee Retirement Income Security Act of 1974 (“ERISA”), as amended, and regulations of the Securities and Exchange Commission.

The Company serves as sponsor of the Plan, and, consequently, has the authority to amend or terminate the Plan subject to certain restrictions. The Board of Directors of the Company has the authority and responsibility for the general administration of the Plan. Fidelity Management Trust Company, as Trustee, has the authority and responsibility to hold and protect the assets of the Plan in accordance with Plan provisions and with the Trust and Administrative Agreement.

Participation

All regular full-time employees are eligible to participate upon employment, and part-time or temporary employees are eligible to participate upon completion of a year of service of at least 1,000 hours. Employees covered by a collective bargaining agreement (“CBA”) are eligible to participate only if the CBA provides for such participation.

If employees do not make an election, nor opt-out within 30 days of employment; they are automatically enrolled at a 6% pre-tax contribution rate, invested in a Target Date fund based upon the date at which the participant is or will be age 65, and further enrolled in auto-escalation increasing their pre-tax contribution 1% annually, with no cap on the annual increases. Employees may opt-out or make alternative elections at any time.

Contributions

Each year, Participants may contribute up to 100% of eligible compensation, as defined in the Plan, and subject to annual limitations imposed by the Code.

The Company makes an Employer Basic Matching Contribution plus an Employer Additional Matching Contribution in an amount equal to a percent of the amount each Participant contributes to the Plan, up to a certain maximum percentage of the Participant’s compensation that he or she elects to contribute to the Plan each year. The amount of Company matching contribution depends on the Participant’s employment classification, and for contract employees is determined by the collective bargaining agreement with the specific union representing the Participants. The Company also makes true-up Employer Basic Matching Contributions for Participants who contribute the IRS maximum before the end of the year and, as a result, do not receive the full company match. The Employer Additional Matching Contributions are invested in the Ameren Stock Fund.

4

Ameren Corporation

Savings Investment Plan

Notes to Financial Statements

December 31, 2016 and 2015

The Plan permits “catch-up” contributions for all employees age 50 and older. Eligible employees could contribute $6,000 in 2016 and 2015, as a “catch-up” contribution. The Company does not match “catch-up” contributions.

Participants direct the investment of their contributions and the Employer Basic Matching Contributions to his or her account to any of the investment options available under the Plan, including Company stock. Contributions may be allocated to a single investment option or allocated in increments of one percent to any combination of investment options. Such elections may be changed daily. Although the Employer Additional Matching Contributions are invested in the Ameren Stock Fund, they may be immediately reallocated to other funds at the participants’ discretion.

Earnings derived from the assets of any investment fund are reinvested in the fund to which they relate. Participants may elect daily to reallocate, by actual dollar or percentage in one percent increments, the value of their accounts between funds. Pending investment of the assets into any investment fund, the Trustee may temporarily make certain short-term investments.

Participant Accounts

Each Participant’s account is credited with the Participant’s contributions and an allocation of (a) the Company’s contributions, and (b) Plan earnings, and is charged with an allocation of administrative expenses. Allocations are based on Participant contributions, eligible compensation, Participant account balances, or specific Participant transactions, as defined. The benefit to which the Participant is entitled is the benefit which can be provided from the Participant’s account. Each Participant directs the investment of his or her account to any of the investment options available under the Plan.

Notes Receivable from Participants

The Plan permits Participants to borrow from their accounts within the Plan. Such borrowings may be made subject to the following: (1) the minimum amount of the loan is $1,000, (2) the amount of the loan may not exceed the lesser of $50,000 or 50% of the vested amount in the Participant’s account, (3) the loan will bear a fixed interest rate and repayments will be made through mutual agreement subject to certain statutory repayment time limits, (4) each loan shall bear a reasonable interest rate as determined under policies established for the Plan and (5) such other rules and regulations as may be adopted by the Company. At December 31, 2016 and 2015, the interest rates on participant loans ranged from 4.00 percent to 10.50 percent.

Vesting

The amounts in Participants’ accounts, including Company contributions, are fully vested at all times.

Payment of Benefits

The total amount of a Participant’s account shall be distributed to the Participant according to one of the options as described in the Plan document and as elected by the Participant after termination of employment. All distributions shall be in the form of cash except that Participants may elect to have his or her interest in the Ameren Stock Fund distributed in shares of Ameren common stock. Participants may withdraw certain basic contributions, rollover contributions and related earnings thereon upon reaching age 59 1/2, in the event of total disability or financial hardship as defined

5

Ameren Corporation

Savings Investment Plan

Notes to Financial Statements

December 31, 2016 and 2015

by the Plan or the Code. For purposes of distributions, the Participant’s account value will be determined as of the last business day coincident with or immediately preceding the day of distribution. Contributions to the Plan and investment income thereon are taxable to Participants upon distribution pursuant to the rules provided for under the Plan and the Code.

The Plan also allows, at the discretion of the Company, participants of the former Union Electric Company Employee Stock Ownership Plan and the former Ameren Corporation Employee Stock Ownership Plan for Certain Employees of AmerenCIPS, to receive certain distributions prior to termination of employment.

Plan Termination

The Company intends to continue the Plan indefinitely. However, the Company may at any time and for any reason, subject to ERISA and Internal Revenue Service regulations, suspend or terminate the Plan provided that such action does not retroactively adversely affect the rights of any Participant under the Plan.

2. Summary of Significant Accounting Policies

Basis of Accounting

The accompanying financial statements of the Plan are prepared on the accrual basis of accounting, except that benefit payments to Participants are recorded upon distribution.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of changes in net assets available for benefits during the reporting period. Actual results could differ from those estimates.

Investment Valuation and Income Recognition

All investments are presented at fair value, except for fully benefit-responsive investment contracts, which are reported at contract value, as of December 31, 2016 and 2015. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. See Note 3 for discussion of fair value measurements.

The Plan has direct investments in fully benefit-responsive investment contracts. Investments held by a defined contribution plan are required to be reported at fair value, except for fully benefit-responsive investment contracts.    Contract value is the relevant measurement attribute for the portion of the net assets available for benefits of a defined contribution plan attributable to fully benefit-responsive investment contracts because contract value is the amount Participants normally would receive if they were to initiate permitted transactions under the terms of the Plan. Contract value represents contributions made under each contract, plus earnings, less participant withdrawals and administrative expenses.

Purchases and sales of securities are recorded on a trade date basis. Interest income is recorded on the accrual basis. Dividend income is recorded on the ex-dividend date. Net appreciation (depreciation) in fair value of investments includes the Plan’s gains and losses on investments bought and sold as well as held during the year.

6

Ameren Corporation

Savings Investment Plan

Notes to Financial Statements

December 31, 2016 and 2015

Notes Receivable from Participants

Notes receivable from Participants are measured at their unpaid principal balance plus any accrued but unpaid interest, with no allowance for credit losses, as repayments of principal and interest are received through payroll deductions and the notes are collateralized by the Participants’ account balances. Delinquent participant loans are reclassified as distributions based upon the terms of the Plan document.

Administrative Expenses

Fees associated with administering the Plan are generally paid by the Plan. Through March 31, 2015, Trustee and recordkeeping fees were primarily paid via (1) revenue sharing payments (payments made directly from investment managers to the recordkeeper), (2) fees accrued in the investment funds that do not pay revenue sharing, and (3) flat dollar fees that are assessed to all Participants quarterly. Beginning April 1, 2015, Trustee and recordkeeping fees are primarily paid via (1) flat dollar fees that are assessed to all Participants quarterly, and (2) fees accrued in investment funds that are separately-managed accounts (versus commingled funds). Also, effective April 1, 2015, revenue sharing payments are allocated to Participant accounts quarterly.

Risks and Uncertainties

Investment securities are exposed to various risks, such as interest rate, market and credit. Due to the level of risk associated with certain investment securities and the level of uncertainty related to changes in the value of investment securities, it is at least reasonably possible that changes in risks in the near term could materially affect the Participants’ account balances and the amounts reported in the Statement of Net Assets Available for Benefits.

Concentrations

Company common stock comprised 13% and 12% of investments at December 31, 2016 and December 31, 2015, respectively.

New Accounting Standards

In May 2015, the Financial Accounting Standards Board issued ASU 2015-07, Fair Value Measurement (Topic 820: Disclosures for Investments in Certain Entities that Calculate Net Asset Value Per Share (or Its Equivalent). Under this guidance, investments measured at net asset value (“NAV”), under the existing practical expedient provided under ASC topic 820, are excluded from the fair value hierarchy. The guidance requires reporting entities to reconcile the fair value hierarchy disclosure to the statement of net assets available for benefits by disclosing the amount of investments measured using the practical expedient. The ASU is effective for fiscal years beginning after December 15, 2016 (December 15, 2015 for public business entities), with early adoption permitted. Retrospective application is required. Management adopted this standard as of December 31, 2016, and retrospectively updated the presentation of these assets in the fair value hierarchy table included in Note 3 Fair Value Measurements. The adoption of this standard had no effect on the Plan’s net assets available for benefits or changes therein.

7

Ameren Corporation

Savings Investment Plan

Notes to Financial Statements

December 31, 2016 and 2015

3. Fair Value Measurements

The authoritative guidance issued by the FASB regarding fair value measurement provides a framework for measuring fair value for all assets and liabilities that are measured and reported at fair value. The guidance defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Certain assumptions that market participants would use in pricing the asset or liability, including assumptions about risk or the risks inherent in the inputs to the valuation, were used in the valuation process. Inputs to valuation can be readily observable, market corroborated, or unobservable. Valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs were used. The provisions also establish a fair value hierarchy that prioritizes the inputs used to measure fair value. All financial assets and liabilities carried at fair value were classified in one of the following three hierarchy levels:

Level 1: Inputs based on quoted prices in active markets for identical assets or liabilities that the Plan has the ability to access at the reporting date.

Level 2: Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. Inputs to the valuation methodology include:

• Quoted prices for similar assets or liabilities in active markets;

• Quoted prices for identical or similar assets or liabilities in inactive markets;

• Inputs other than quoted prices that are observable for the asset or liability;

• Inputs that are derived principally from or corroborated by observable market data by correlation or other means.

Level 3: Inputs to the valuation methodology that are unobservable and significant to the fair value measurement.

The asset or liability’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.

Following is a description of the valuation methodologies used for assets measured at fair value.

There have been no changes in the methodologies used during 2016.

• Margin deposit account: The fair value is estimated to approximate deposit account balances, payable on demand, as no discounts for credit quality or liquidity were determined to be applicable (Level 2 inputs).

• Common stocks: Valued at the closing price reported on the active markets on which the individual securities are traded (Level 1 inputs).

• Limited partnership: The fair value is determined by obtaining a quoted price from a nationally recognized exchange (Level 1 input). Under ordinary market conditions, daily redemption is available. The limited partnership was held as part of an investment strategy to outperform the Russell 2500 Growth Index.

8

Ameren Corporation

Savings Investment Plan

Notes to Financial Statements

December 31, 2016 and 2015

• U.S. government securities and corporate debt securities: Valued based upon recent bid prices or the average of recent bid and asked prices when available (Level 2 inputs) and, if not available, they are valued through matrix pricing models developed by sources considered by management to be reliable. Matrix pricing, which is a mathematical technique commonly used to price debt securities that are not actively traded, values debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs).

• Other debt securities includes both non-U.S. government debt securities and derivatives: Non-U.S. government debt securities are valued based upon recent bid prices or the average of recent bid and asked prices when available (Level 2 inputs) and, if not available, they are valued through matrix pricing models developed by sources considered by management to be reliable. Matrix pricing, which is a mathematical technique commonly used to price debt securities that are not actively traded, values debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs). The fair values of exchange-traded derivatives are based upon quoted market prices (Level 1 inputs). The fair values of derivatives that are not traded on an exchange are based upon valuation models using observable market data as of the measurement date (Level 2 inputs).

• Mutual funds: Valued at the daily closing price as reported by the fund (Level 1 inputs). Mutual funds held by the Plan are open-end mutual funds that are registered with the Securities and Exchange Commission. These funds are required to publish their daily net asset value (NAV) and to transact at that price. The mutual funds held by the Plan are deemed to be actively traded.

• Collective trust funds: The fair values of participation units held in collective trusts are based on the NAV reported by the fund managers as of the financial statement dates and recent transaction prices. Under ordinary market conditions, redemptions of investments in collective trusts are permitted as of daily or monthly valuation dates, as applicable, and are executed at NAV as a practical expedient.

9

Ameren Corporation

Savings Investment Plan

Notes to Financial Statements

December 31, 2016 and 2015

The following table sets forth, by level within the fair value hierarchy, Plan assets measured at fair value on a recurring basis as of December 31, 2016:

	Quoted Prices In Active Markets for Identified Assets (Level 1)			Significant Other Observable Inputs (Level 2)			Measured at Net Asset Value as a Practical Expedient (a)		Total
Assets
Margin deposit account	$	—		$	100,200		$	—	$	100,200
Common stocks-Plan sponsor stock		268,844,805			—			—		268,844,805
Common stocks-other than Plan sponsor stock		223,472,836			—			—		223,472,836
U.S. Government securities		—			14,157,327			—		14,157,327
Corporate debt securities		—			25,756,145			—		25,756,145
Other debt securities		1,500			5,517,816			—		5,519,316
Collective trust funds		—			—			1,088,860,727		1,088,860,727
Mutual funds		167,941,974			—			—		167,941,974
Liabilities
Other debt securities		(9,930	)		(1,209	)		—		(11,139	)
Total assets reported at fair value	$	660,251,185		$	45,530,279		$	1,088,860,727	$	1,794,642,191

(a) In accordance with ASU 2015-07, certain investments measured at net asset value (NAV) per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy. The fair value amount measured at NAV presented in this table is intended to permit reconciliation of the fair value hierarchy to the investments at fair value presented in the statement of net assets available for benefits.

10

Ameren Corporation

Savings Investment Plan

Notes to Financial Statements

December 31, 2016 and 2015

The following table sets forth, by level within the fair value hierarchy, Plan assets measured at fair value on a recurring basis as of December 31, 2015:

	Quoted Prices In Active Markets for Identified Assets (Level 1)			Significant Other Observable Inputs (Level 2)		Measured at Net Asset Value as a Practical Expedient (a)		Total
Assets
Margin deposit account	$	—		$	213,760	$	—	$	213,760
Common stocks-Plan sponsor stock		227,770,008			—		—		227,770,008
Common stocks-other than Plan sponsor stock		188,526,265			—		—		188,526,265
Limited partnership		693,154			—		—		693,154
U.S. Government securities		—			11,911,021		—		11,911,021
Corporate debt securities		—			33,564,256		—		33,564,256
Other debt securities		1,000			1,025,382		—		1,026,382
Collective trust funds		—			—		982,293,330		982,293,330
Mutual funds		198,537,364			—		—		198,537,364
Liabilities
Other debt securities		(9,891	)		—		—		(9,891	)
Total assets reported at fair value	$	615,517,900		$	46,714,419	$	982,293,330	$	1,644,525,649

(a) In accordance with ASU 2015-07, certain investments measured at net asset value (NAV) per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy. The fair value amount measured at NAV presented in this table is intended to permit reconciliation of the fair value hierarchy to the investments at fair value presented in the statement of net assets available for benefits.

The Plan does not hold any investments requiring Level 3 measurements, and there have not been any transfers between measurement input levels in 2016 or 2015.

4. Fully Benefit-Responsive Investment Contracts

The Plan holds investments in a separately-managed stable value account that is managed by Galliard Capital Management. The separately-managed account holds (1) an investment in a money market mutual fund, and (2) a portfolio of synthetic investment contracts, valued at $299,821,780 and $283,716,698 at December 31, 2016 and December 31, 2015, respectively. The investment contracts meet the fully benefit-responsive investment criteria and therefore are reported at contract value. Contract value is the relevant measure for fully benefit-responsive investment contracts because this is the amount received by Participants if they were to initiate permitted transactions under the terms of the Plan. Contract value represents contributions made under each contract, plus earnings, less participant withdrawals and administrative expenses.

The investment contracts are issued by the following insurance companies:

• American General Life Insurance Company (“AGL”)

• Prudential Insurance Company of America (“Prudential”)

• Voya Retirement Insurance and Annuity Company (“Voya”), as of December 31, 2016

• Massachusetts Mutual Life Insurance Company (“Mass Mutual”)

• Metropolitan Life Insurance Company (“Met Life”)

11

Ameren Corporation

Savings Investment Plan

Notes to Financial Statements

December 31, 2016 and 2015

• New York Life Insurance Company (“NYL”), as of December 31, 2015

As of December 31, 2016, the underlying investments of the AGL, Prudential, and Voya contracts are holdings in collective trust funds. As of December 31, 2015, the underlying investments of the AGL, Prudential, and NYL contracts are holdings in collective trust funds. As of December 31, 2016 and 2015, the underlying investments of the Mass Mutual and Met Life contracts are holdings in portfolios of fixed income securities, which are segregated from the insurance company’s general account assets. The segregation of these assets from the insurance company’s general account offers certain protections to mitigate the risk that these assets might be subject to creditor claims other than those of the separate account GIC owners.

The investment contracts include wrapper contracts, which are agreements for the wrap issuer to make payments to the Plan in certain circumstances. The wrapper contract typically includes certain conditions and limitations on the underlying assets owned by the Plan. The contracts are designed to accrue interest based on crediting rates established by the contract issuers, and also provide a guarantee that the credit rate will not fall below zero percent. Cash flow volatility (for example, timing of benefit payments) as well as asset underperformance can be passed through to the Plan through adjustments to future contract crediting rates. Formulas are provided in each contract that adjusts renewal crediting rates to recognize the difference between the fair value and the book value of the underlying assets. Crediting rates are reset at least quarterly.

The Plan’s ability to receive amounts due in accordance with fully benefit-responsive investment contracts is dependent on the third-party issuer’s ability to meet its financial obligations. The issuer’s ability to meet its contractual obligations may be affected by future economic and regulatory developments.

Certain events might limit the ability of the Plan to transact at contract value. Investment contracts generally provide for withdrawals associated with certain events which are not in the ordinary course of operations. These withdrawals are paid with a market value adjustment applied to the withdrawal as defined in the investment contract. Each contract issuer specifies the events which may trigger a market value adjustment; however, such events may include all or a portion of the following:

• material amendments to the account’s structure or administration;

• changes to the Plan’s competing investment options including the elimination of equity wash provisions;

• complete or partial termination of the investment, including a merger with another investment account;

• the failure of the Plan to qualify for exemption from federal income taxes or any required prohibited transaction exemption under ERISA;

• the redemption of all or a portion of the interests in the account held by a participating plan at the direction of the participating plan sponsor, including withdrawals due to the removal of a specifically identifiable group of employees from coverage under the participating plan (such as a group layoff or early retirement incentive program), the closing or sale of a subsidiary, employing unit, or affiliate, the bankruptcy or insolvency of a plan sponsor, the merger of the Plan with another plan, or the Plan sponsor’s establishment of another tax qualified defined contribution plan;

12

Ameren Corporation

Savings Investment Plan

Notes to Financial Statements

December 31, 2016 and 2015

• any change in law, regulation, ruling, administrative or judicial position, or accounting requirement, applicable to the account or participating plans;

• the delivery of any communication to Participants designed to influence a participant not to invest in the investment option;

• the addition of an Asset Allocation or Managed Account service without prior approval, or a material change in an existing program;

• the distribution of a prohibited communication.

No events are probable of occurring that might limit the ability of the Plan to transact at contract value with the contract issuers and that also would limit the ability of the Plan to transact at contract value with the Participants.

These contracts are evergreen contracts and contain termination provisions, allowing the contract issuer to terminate with notice, at any time at fair value, and providing for automatic termination of the contract if the contract value or the fair value of the underlying portfolio equals zero. The issuer is obligated to pay the excess contract value when the fair value is below contract value at the time of termination. In addition, if the Company defaults in its obligations under the contract (including the issuer’s determination that the agreement constitutes a non-exempt prohibited transaction as defined under ERISA), and such default is not corrected within the time permitted by the contract, then the contract may be terminated by the issuer and the Plan will receive the fair value as of the date of termination.

5. Transactions with Parties-in-Interest

Parties-in-interest are defined under Department of Labor regulations as any fiduciary of the Plan, any party rendering service to the Plan, the employer, and certain others.

At December 31, 2016, the Plan held 5,124,758 shares of Company common stock with a cost and fair value of $193,417,367 and $268,844,805, respectively. During 2016, the Plan purchased 772,300 shares at a cost of $37,758,809 and sold 899,300 shares valued at $43,880,275.

At December 31, 2015, the Plan held 5,268,795 shares of Company common stock with a cost and fair value of $189,208,773 and $227,770,008, respectively. During 2015, the Plan purchased 879,500 shares at a cost of $36,272,199 and sold 921,100 shares valued at $38,778,584.

Dividend income from Company common stock was $8,808,189 and $10,865,043 for the years ended December 31, 2016 and December 31, 2015, respectively.

At December 31, 2016, the Plan held shares in the Fidelity Institutional Money Market Government Portfolio, and at December 31, 2015, the Plan held shares in the Fidelity Management Trust Company Institutional Cash Portfolio. These portfolios are managed by the Trustee, and therefore, qualify as party-in-interest transactions. Notes receivable from Participants also reflect party-in-interest transactions.

Fees paid by the Plan to the Trustee for recordkeeping and trust services were $1,118,005 and $1,060,655 for the years ended December 31, 2016 and December 31, 2015, respectively.

13

Ameren Corporation

Savings Investment Plan

Notes to Financial Statements

December 31, 2016 and 2015

Fees paid to and investments issued by various Plan investment managers also reflect party-in-interest transactions.

These transactions are allowable party-in-interest transactions under Section 408(b)(8) of ERISA.

6. Reconciliation of Financial Statements to Form 5500

The following is a reconciliation of net assets available for benefits per the financial statements to the Form 5500 at December 31, 2016 and 2015:

	2016			2015
Net assets available for benefits per the financial statements	$	2,124,618,256		$	1,965,950,838
Amounts allocated to deemed distributions of notes receivable from Participants		(1,343,400	)		(1,233,481	)
Adjustment from contract value to fair value for fully benefit-responsive investment contracts		(646,579	)		(609,075	)
Net assets available for benefits per the Form 5500	$	2,122,628,277		$	1,964,108,282

Deemed distributions of notes receivable from Participants, resulting from defaults of notes receivable from Participants, are no longer considered assets of the Plan with respect to Form 5500 filings.

The following is a reconciliation of net increase in net assets available for benefits per the financial statements to net income per the Form 5500 for the year ended December 31, 2016:

Net increase in net assets available for benefits per the financial statements	$	158,667,418
Add: Adjustment from contract value to fair value for fully benefit-responsive investment contracts as of the current year-end		(646,579	)
Less: Adjustment from contract value to fair value for fully benefit-responsive investment contracts as of the prior year-end		609,075
Less: Net increase in defaulted notes receivable from Participants		(11,032	)
Less: Interest income of defaulted notes receivable from Participants		(98,887	)
Total net income per the Form 5500	$	158,519,995

7. Federal Income Tax Status

The Company obtained its latest determination letter September 18, 2013, in which the Internal Revenue Service stated that the Plan was in compliance with the applicable requirements of the Code. Although the Plan has been amended since receiving the determination letter, the Plan’s administrator believes that the Plan is designed and is currently being operated in compliance with the applicable requirements of the Code.

14

Ameren Corporation

Savings Investment Plan

Notes to Financial Statements

December 31, 2016 and 2015

Accounting principles generally accepted in the United States of America require Plan management to evaluate tax positions taken by the Plan and recognize a tax liability (or asset) if the Plan has taken an uncertain position that more likely than not would not be sustained upon examination by the Internal Revenue Service. The Plan administrator has analyzed the tax positions taken by the Plan, and has concluded that as of December 31, 2016 and 2015, there are no uncertain positions taken or expected to be taken that would require recognition of a liability (or asset) or disclosure in the financial statements. The Plan is subject to routine audits by taxing jurisdictions; however, there are currently no audits for any tax periods in progress. The Plan administrator believes it is no longer subject to income tax examinations for years prior to 2013.

8. Subsequent Events

The Plan was amended effective January 1, 2017, in which the authority and responsibility for the general administration of the Plan was changed from the Board of Directors of the Company to the Administrative Committee of the Company.

The Company filed for a new determination letter with the Internal Revenue Service on January 31, 2017.

15

Page 1 of 10

Ameren Corporation Savings Investment Plan

SCHEDULE H, Line 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)

December 31, 2016

Name of plan sponsor: Ameren Corporation

Employer identification number: 43-1723446

Three-digit plan number: 003

(a)	(b)	(c)			(d)		(e)
	Identity of issue, borrower,	Description of investment including maturity date,					Current
	lessor, or similar party	rate of interest, collateral, par, or maturity value			Cost		value
	Interest-bearing Cash
	State Street Global Advisors		SSGA Short Term Investment Fund		$	11,418,507	$	11,418,507
	FUTURES CASH COLLATERAL		43,760.00	Shares		45,000		45,000
	SWAP COLLATERAL USD		170,000.00	Shares		55,200		55,200
	Total Interest-bearing Cash					11,518,707		11,518,707
	Mutual Funds
	American Funds Group		EuroPacific Growth Fund			104,011,919		100,524,511
	RBC Global Asset Management		RBC BlueBay Absolute Return Fund			12,145,719		11,624,847
	Sands Capital Management		Touchstone Sands Capital Institutional Growth Fund			36,294,133		35,757,175
*	Fidelity Management Trust Company		Fidelity Institutional Money Market Government Portfolio			20,035,441		20,035,441
	Total Mutual Funds					172,487,212		167,941,974
	Collective Investment Trusts
	Robeco Trust Company		Boston Partners Large Cap Value Equity Fund E			60,751,875		75,005,484
	Nuveen Fund Advisors		NWQ Small/Mid Cap Value Fund J			47,526,473		74,442,682
	Wells Fargo Bank, N.A.		Wells Fargo Fixed Income Fund F			92,543,564		95,652,828
	Wells Fargo Bank, N.A.		Wells Fargo Fixed Income Fund L			91,238,729		92,214,720
	BlackRock Institutional Trust Company, N.A.		BlackRock Equity Index Fund M			221,687,373		242,067,619
	BlackRock Institutional Trust Company, N.A.		BlackRock Russell 2500 Fund M			140,690,761		157,747,240
	BlackRock Institutional Trust Company, N.A.		BlackRock LifePath Index 2020 Fund L			90,231,116		92,128,060
	BlackRock Institutional Trust Company, N.A.		BlackRock LifePath Index 2025 Fund L			78,000,647		80,223,085
	BlackRock Institutional Trust Company, N.A.		BlackRock LifePath Index 2030 Fund L			54,046,858		55,910,912
	BlackRock Institutional Trust Company, N.A.		BlackRock MSCI ACWI ex-US IMI Index Fund M			60,484,825		62,268,999
	BlackRock Institutional Trust Company, N.A.		BlackRock LifePath Index Retirement Fund L			33,620,081		34,165,914
	BlackRock Institutional Trust Company, N.A.		BlackRock US Debt Index Fund M			65,449,120		64,366,138
	BlackRock Institutional Trust Company, N.A.		BlackRock LifePath Index 2035 Fund L			29,972,699		31,164,414
	BlackRock Institutional Trust Company, N.A.		BlackRock LifePath Index 2040 Fund L			27,410,354		28,622,847
	BlackRock Institutional Trust Company, N.A.		BlackRock LifePath Index 2045 Fund L			26,248,726		27,476,083
	BlackRock Institutional Trust Company, N.A.		BlackRock LifePath Index 2050 Fund L			22,446,422		23,507,988
	BlackRock Institutional Trust Company, N.A.		BlackRock TIPS Bond Index Fund M			15,281,910		15,258,613
	BlackRock Institutional Trust Company, N.A.		BlackRock LifePath Index 2055 Fund L			11,903,095		12,435,204
	BlackRock Institutional Trust Company, N.A.		BlackRock LifePath Index 2060 Fund L			631,887		650,938
	Total Collective Investment Trusts					1,170,166,515		1,265,309,768
	Pooled Separate Account
	Massachusetts Mutual Life Ins. Co.		Separate Account #SB43			39,762,358		39,765,409
	Insurance Company Separate Accounts
	Metropolitan Life Ins Co.		Separate Account #690			35,091,656		36,373,537
	Metropolitan Life Ins Co.		Separate Account #694			35,048,594		35,168,707
	Total Insurance Company Separate Accounts					70,140,250		71,542,244
	Common Stocks
*	Ameren Corporation		5,124,758.00	Shares		193,417,367		268,844,805
	TENCENT HOLDINGS LIMITED		55,471.00	Shares		977,771		1,356,999
	ALLERGAN PLC		5,435.00	Shares		1,452,725		1,141,404
	NXP SEMICONDUCTORS NV		10,095.00	Shares		950,032		989,411
	ABBOTT LABORATORIES		17,647.00	Shares		680,403		677,821
	ADOBE SYSTEMS INC		14,238.00	Shares		858,104		1,465,802
	ALBEMARLE CORP		5,221.00	Shares		427,090		449,424
	ALEXION PHARMACEUTICALS		6,961.00	Shares		990,239		851,678
	ALIBABA GROUP HLD SPON AD		19,763.00	Shares		1,621,610		1,735,389

1

Page 2 of 10

Ameren Corporation Savings Investment Plan

SCHEDULE H, Line 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)

December 31, 2016

Name of plan sponsor: Ameren Corporation

Employer identification number: 43-1723446

Three-digit plan number: 003

(a)	(b)	(c)			(d)		(e)
	Identity of issue, borrower,	Description of investment including maturity date,					Current
	lessor, or similar party	rate of interest, collateral, par, or maturity value			Cost		value
	ALPHABET INC CL C		2,829.00	Shares		1,278,136		2,183,479
	ALPHABET INC CL A		2,390.00	Shares		968,306		1,893,956
	AMAZON.COM INC		6,176.00	Shares		1,824,335		4,631,197
	APPLE INC		28,574.00	Shares		2,722,610		3,309,441
	BIOMARIN PHARMACEUTICAL		10,116.00	Shares		766,366		838,009
	BOEING CO		11,929.00	Shares		1,191,708		1,857,107
	BRISTOL-MYERS SQUIBB CO		25,631.00	Shares		1,384,251		1,497,876
	CELGENE CORP		14,153.00	Shares		1,320,243		1,638,210
	CHARTER COMM INC A		819.00	Shares		207,052		235,806
	CONCHO RESOURCES INC		7,845.00	Shares		673,959		1,040,247
	CONSTELLATION BRANDS CL A		2,299.00	Shares		349,945		352,460
	COSTCO WHOLESALE CORP		5,869.00	Shares		609,925		939,686
	EOG RESOURCES INC		10,085.00	Shares		684,409		1,019,594
	EXPEDIA INC		3,770.00	Shares		443,993		427,066
	FACEBOOK INC A		24,493.00	Shares		950,788		2,817,920
	FLEETCOR TECHNOLOGIES INC		6,987.00	Shares		926,720		988,800
	GOLDMAN SACHS GROUP INC		6,232.00	Shares		966,265		1,492,252
	ADIDAS AG		5,687.00	Shares		890,782		898,861
	HALLIBURTON CO		24,907.00	Shares		1,147,175		1,347,220
	HOME DEPOT INC		5,500.00	Shares		716,496		737,440
	ILLUMINA INC		4,160.00	Shares		260,140		532,646
	INDITEX SA UNSPN ADR		61,354.00	Shares		907,829		1,041,177
	JPMORGAN CHASE & CO		10,260.00	Shares		816,799		885,335
	MARRIOTT INTL INC A		17,044.00	Shares		1,055,278		1,409,198
	MASTERCARD INC CL A		22,321.00	Shares		1,138,982		2,304,643
	MICROSOFT CORP		39,225.00	Shares		2,155,440		2,437,442
	MONDELEZ INTL INC		26,011.00	Shares		845,823		1,153,068
	MONSTER BEVERAGE CORP		17,061.00	Shares		770,075		756,485
	NETFLIX INC		13,732.00	Shares		773,049		1,700,022
	NIKE INC CL B		29,537.00	Shares		770,352		1,501,366
	NVIDIA CORP		17,722.00	Shares		889,108		1,891,646
	PALO ALTO NETWORKS INC		5,802.00	Shares		895,926		725,540
	PARKER HANNIFIN CORP		5,103.00	Shares		712,071		714,420
	PRICELINE GROUP INC		1,146.00	Shares		878,833		1,680,105
	QUALCOMM INC		17,432.00	Shares		1,039,789		1,136,566
	RED HAT INC		14,909.00	Shares		803,700		1,039,157
	REGENERON PHARMACEUTICALS		1,851.00	Shares		958,031		679,484
	S&P GLOBAL INC		6,491.00	Shares		574,455		698,042
	SALESFORCE.COM INC		23,826.00	Shares		1,191,844		1,631,128
	SHIRE PLC SPON ADR		7,230.00	Shares		1,587,004		1,231,847
	SPLUNK INC		14,120.00	Shares		591,267		722,238
	STARBUCKS CORP		21,502.00	Shares		884,621		1,193,791
	TJX COMPANIES INC NEW		10,783.00	Shares		574,933		810,127
	TESLA INC		2,962.00	Shares		515,856		632,950
	TIME WARNER INC		9,261.00	Shares		804,303		893,964
	VERTEX PHARMACEUTICALS		5,198.00	Shares		454,514		382,937
	VISA INC CL A		28,160.00	Shares		1,200,514		2,197,043
	WORKDAY INC CL A		9,833.00	Shares		681,052		649,863
	WILLIS TOWERS WATSON PLC		17,780.00	Shares		2,029,694		2,174,138
	BROADCOM LTD		14,717.00	Shares		1,950,256		2,601,524
	JOHNSON CONTROLS INTERNAT		61,180.00	Shares		2,880,654		2,520,004
	ARRIS INTERNATIONAL PLC		25,119.00	Shares		595,203		756,835
	AERCAP HOLDINGS NV		33,707.00	Shares		975,670		1,402,548
	SUNCOR ENERGY INC		2,353.00	Shares		62,019		76,920
	TE CONNECTIVITY LTD		35,491.00	Shares		1,923,805		2,458,816

2

Page 3 of 10

Ameren Corporation Savings Investment Plan

SCHEDULE H, Line 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)

December 31, 2016

Name of plan sponsor: Ameren Corporation

Employer identification number: 43-1723446

Three-digit plan number: 003

(a)	(b)	(c)			(d)		(e)
	Identity of issue, borrower,	Description of investment including maturity date,					Current
	lessor, or similar party	rate of interest, collateral, par, or maturity value			Cost		value
	EATON CORP PLC		40,150.00	Shares		2,050,385		2,693,664
	AFLAC INC		35,844.00	Shares		2,065,208		2,494,742
	AECOM		26,703.00	Shares		695,839		970,921
	AETNA INC		19,626.00	Shares		1,996,899		2,433,820
	AMERIPRISE FINANCIAL INC		23,160.00	Shares		2,081,039		2,569,370
	ANTHEM INC		15,629.00	Shares		1,994,496		2,246,981
	ASSURANT INC		11,350.00	Shares		900,049		1,053,961
	AVIS BUDGET GROUP		17,114.00	Shares		433,908		627,742
	CELANESE CORP SER A		26,098.00	Shares		1,663,732		2,054,957
	COMCAST CORP CL A		36,334.00	Shares		2,106,993		2,508,863
	COMMSCOPE HOLDING CO INC		32,658.00	Shares		1,028,585		1,214,878
	CORNING INC		109,177.00	Shares		2,019,303		2,649,726
	EOG RESOURCES INC		29,423.00	Shares		2,067,251		2,974,665
	GOODYEAR TIRE & RUBBER CO		45,436.00	Shares		1,278,467		1,402,609
	HERTZ GLOBAL HOLDINGS INC		18,314.00	Shares		673,539		394,850
	LIBERTY INTERACTIVE CL A		78,808.00	Shares		1,991,891		1,574,584
	LINCOLN NATIONAL CORP		39,685.00	Shares		1,683,518		2,629,925
	MICROSEMI CORP		17,871.00	Shares		675,728		964,498
	NCR CORP		28,655.00	Shares		611,784		1,162,247
	NATIONAL OILWELL VARCO		63,425.00	Shares		1,785,861		2,374,632
	OWENS ILLINOIS INC		28,291.00	Shares		353,639		492,546
	SUNCOR ENRGY INC		86,114.00	Shares		1,972,872		2,815,067
	SYMANTEC CORP		103,203.00	Shares		1,982,258		2,465,520
	TENNECO INC		9,998.00	Shares		368,709		624,575
	WESTERN DIGITAL CORP		38,964.00	Shares		1,868,583		2,647,604
	WESTERN UNION CO		87,775.00	Shares		1,528,211		1,906,473
	WHIRLPOOL CORP		12,189.00	Shares		2,281,494		2,215,595
	MOBILEYE NV		39,387.00	Shares		1,696,702		1,501,432
	SHOPIFY INC CL A (US)		5,930.00	Shares		240,840		254,219
	NORWEGIAN CRUISE LINE HLG		6,800.00	Shares		301,676		289,204
	ABIOMED INC		2,700.00	Shares		278,227		304,236
	ALBEMARLE CORP		7,000.00	Shares		590,413		602,560
	ALIGN TECHNOLOGY INC		10,018.00	Shares		699,888		963,030
	AMETEK INC NEW		16,800.00	Shares		837,796		816,480
	BLUEBIRD BIO INC		2,300.00	Shares		166,693		141,910
	BOOZ ALLEN HAMILTON CL A		12,200.00	Shares		400,405		440,054
	BORGWARNER INC		26,700.00	Shares		972,248		1,053,048
	BURLINGTON STORES INC		11,121.00	Shares		700,080		942,505
	CACI INTERNATIONAL INC		1,800.00	Shares		200,599		223,740
	COGNEX CORP		6,900.00	Shares		376,268		438,978
	COHERENT INC		2,449.00	Shares		210,030		336,456
	COHERUS BIOSCIENCES INC		8,349.00	Shares		177,992		235,024
	COMERICA INC		5,800.00	Shares		329,595		395,038
	COMMSCOPE HOLDING CO INC		26,304.00	Shares		791,440		978,509
	COMMVAULT SYSTEMS INC		9,000.00	Shares		487,402		462,600
	DAVE & BUSTERS ENTMT INC		4,700.00	Shares		211,388		264,610
	IMAX CORP		16,000.00	Shares		501,951		502,400
	DIAMONDBACK ENERGY INC		4,822.00	Shares		375,131		487,311
	DYCOM INDUSTRIES INC		3,978.00	Shares		288,656		319,394
	E TRADE FINANCIAL CORP		23,900.00	Shares		795,921		828,135
	ROYAL CARIBBEAN CRUISES		11,700.00	Shares		911,498		959,868
	EXPEDIA INC		1,700.00	Shares		216,883		192,576
	FIRST REPUBLIC BANK		7,924.00	Shares		589,704		730,117
	FIVE9 INC		28,090.00	Shares		259,466		398,597
	GENESEE & WYOMING CL A		9,200.00	Shares		694,306		638,572

3

Page 4 of 10

Ameren Corporation Savings Investment Plan

SCHEDULE H, Line 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)

December 31, 2016

Name of plan sponsor: Ameren Corporation

Employer identification number: 43-1723446

Three-digit plan number: 003

(a)	(b)	(c)			(d)		(e)
	Identity of issue, borrower,	Description of investment including maturity date,					Current
	lessor, or similar party	rate of interest, collateral, par, or maturity value			Cost		value
	GRUBHUB INC		8,000.00	Shares		313,445		300,960
	HEALTHSOUTH CORP		10,202.00	Shares		417,540		420,730
	IDEXX LABS INC		12,906.00	Shares		1,006,257		1,513,487
	INTER PARFUMS INC		12,500.00	Shares		413,279		409,375
	INTRA-CELLULAR THERAPIES		8,572.00	Shares		278,799		129,351
	IROBOT CORP		8,900.00	Shares		417,177		520,205
	JACK IN THE BOX INC		1,600.00	Shares		155,921		178,624
	K2M GROUP HLDGS INC		18,612.00	Shares		386,393		372,984
	LEXICON PHARMACEUTICALS		16,671.00	Shares		300,597		230,560
	MKS INSTRUMENTS INC		5,900.00	Shares		290,548		350,460
	MATCH GROUP INC		17,400.00	Shares		309,583		297,540
	MERCURY SYSTEMS INC		9,773.00	Shares		208,975		295,340
	METTLER-TOLEDO INTL INC		970.00	Shares		399,009		406,003
	MICRON TECHNOLOGY INC		48,213.00	Shares		657,755		1,056,829
	MICROSEMI CORP		4,100.00	Shares		166,522		221,277
	MIDDLEBY CORP		7,456.00	Shares		915,576		960,407
	MINDBODY INC CL A		18,500.00	Shares		363,072		394,050
	NEUROCRINE BIOSCIENCES		3,200.00	Shares		155,830		123,840
	NEVRO CORPORATION		8,493.00	Shares		523,765		617,101
	NEWFIELD EXPLORATION CO		19,400.00	Shares		887,094		785,700
	NORDSTROM INC		8,800.00	Shares		499,635		421,784
	NUVASIVE INC		10,562.00	Shares		589,207		711,456
	PVH CORP		2,300.00	Shares		253,990		207,552
	PANERA BREAD CO CL A		1,660.00	Shares		347,178		340,449
	PARSLEY ENERGY INC CL A		6,052.00	Shares		132,150		213,272
	PROOFPOINT INC		2,105.00	Shares		71,353		148,718
	RADIAN GROUP INC		25,300.00	Shares		428,729		454,894
	RINGCENTRAL INC CL A		29,581.00	Shares		617,490		609,369
	SERVICENOW INC		13,734.00	Shares		707,157		1,020,986
	SNYDERS LANCE INC		19,000.00	Shares		695,435		728,460
	SPIRIT AIRLINES INC		14,200.00	Shares		735,141		821,612
	SQUARE INC CL A		36,230.00	Shares		431,557		493,815
	STAMPS.COM INC		7,548.00	Shares		486,391		865,378
	TAKE-TWO INTERACTV SOFTWR		8,500.00	Shares		382,359		418,965
	TENNECO INC		14,900.00	Shares		840,742		930,803
	TESARO INC		3,885.00	Shares		466,403		522,455
	TRIMBLE INC		11,966.00	Shares		306,816		360,775
	US CONCRETE INC C NEW		7,322.00	Shares		375,231		479,591
	US SILICA HOLDINGS INC		7,400.00	Shares		411,893		419,432
	ULTA BEAUTY INC		2,904.00	Shares		378,069		740,346
	ULTRAGENYX PHARMA INC		2,571.00	Shares		219,651		180,767
	UNIVERSAL DISPLAY CORP		9,102.00	Shares		434,272		512,443
	VAIL RESORTS INC		4,869.00	Shares		672,784		785,418
	VANTIV INC		5,104.00	Shares		278,104		304,300
	VIASAT INC		3,010.00	Shares		209,551		199,322
	VOCERA COMMUNICATIONS INC		24,512.00	Shares		371,878		453,227
	WABASH NATIONAL CORP		13,600.00	Shares		214,353		215,152
	WELLCARE HEALTH PLANS INC		8,105.00	Shares		751,904		1,111,033
	WHITING PETROLEUM CORP		16,700.00	Shares		209,302		200,734
	ZIONS BANCORP		21,150.00	Shares		733,550		910,296
	ZUMIEZ INC		8,500.00	Shares		203,572		185,725
	OM ASSET MANAGEMENT PLC		24,777.00	Shares		424,898		359,267
	AXALTA COATING SYSTEMS		20,890.00	Shares		586,413		568,208
	FIRSTSERVICE CORP (US)		12,605.00	Shares		278,014		598,485
	HERBALIFE LTD		8,120.00	Shares		477,602		390,897

4

Page 5 of 10

Ameren Corporation Savings Investment Plan

SCHEDULE H, Line 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)

December 31, 2016

Name of plan sponsor: Ameren Corporation

Employer identification number: 43-1723446

Three-digit plan number: 003

(a)	(b)	(c)			(d)		(e)
	Identity of issue, borrower,	Description of investment including maturity date,					Current
	lessor, or similar party	rate of interest, collateral, par, or maturity value			Cost		value
	ABIOMED INC		5,750.00	Shares		283,582		647,910
	AFFILIATED MANAGERS GRP		6,002.00	Shares		883,596		872,091
	AKAMAI TECHNOLOGIES INC		11,650.00	Shares		578,825		776,822
	AKORN INC		31,351.00	Shares		780,523		684,392
	ALIGN TECHNOLOGY INC		5,327.00	Shares		218,038		512,085
	AMEDISYS INC		11,325.00	Shares		478,485		482,785
	ARISTA NETWORKS INC		5,540.00	Shares		418,890		536,106
	BWX TECHNOLOGIES INC		21,890.00	Shares		829,300		869,033
	BALL CORP		9,420.00	Shares		688,381		707,159
	BANK OF THE OZARKS INC		18,170.00	Shares		766,426		955,560
	BLUE BUFFALO PET PRODUCTS		18,710.00	Shares		470,220		449,788
	BOOZ ALLEN HAMILTON CL A		29,613.00	Shares		729,892		1,068,141
	CBOE HOLDINGS INC		6,720.00	Shares		262,959		496,541
	CSRA INC		26,270.00	Shares		732,322		836,437
	CABLE ONE INC W/I		470.00	Shares		218,756		292,213
	CAMBREX CORP		15,490.00	Shares		725,122		835,686
	CARRIZO OIL & GAS INC		9,820.00	Shares		451,607		366,777
	CELANESE CORP SER A		9,260.00	Shares		466,746		729,132
	CENTENE CORP		13,950.00	Shares		844,997		788,315
	COLLIERS INTL GRP INC		160.00	Shares		5,853		5,851
	COLLIERS INTL GROUP (US)		8,404.00	Shares		223,769		308,847
	COPART INC		16,610.00	Shares		850,831		920,360
	COSTAR GROUP INC		6,393.00	Shares		844,904		1,205,017
	IMAX CORP		19,832.00	Shares		620,116		622,725
	DEVRY EDUCATION GROUP INC		19,437.00	Shares		419,885		606,434
	DIAMONDBACK ENERGY INC		7,520.00	Shares		521,714		759,971
	DUN & BRADSTREET DEL NEW		4,350.00	Shares		498,255		527,742
	ENCORE CAP GROUP INC		15,419.00	Shares		542,326		441,754
	EXACT SCIENCES CORP		44,550.00	Shares		541,501		595,188
	FACTSET RESEARCH SYS INC		3,661.00	Shares		431,946		598,317
	FIRSTCASH INC		11,751.00	Shares		586,489		552,297
	FIRSTSERVICE CORP		120.00	Shares		5,710		5,708
	GLAUKOS CORP		14,730.00	Shares		481,156		505,239
	GUIDEWIRE SOFTWARE INC		18,112.00	Shares		762,663		893,465
	HEALTHSOUTH CORP		14,616.00	Shares		497,803		602,764
	HEICO CORP CL A		8,750.00	Shares		477,231		594,125
	HEXCEL CORPORATION		13,810.00	Shares		577,740		710,386
	IBERIABANK CORP		4,200.00	Shares		371,677		351,750
	IDEXX LABS INC		4,036.00	Shares		263,671		473,302
	ISHARES RUSSEL MIDCP GRWT		3,079.00	Shares		296,367		299,864
	ISHARES RUSSELL 2000 GR E		7,800.00	Shares		1,146,105		1,200,732
	JONES LANG LASALLE INC		4,347.00	Shares		472,218		439,221
	J2 GLOBAL INC		13,945.00	Shares		720,075		1,140,701
	LIGAND PHARMACEUTICALS		9,116.00	Shares		610,164		926,277
	MARTIN MARIETTA MATERIALS		2,900.00	Shares		475,559		642,437
	MAXIMUS INC		18,750.00	Shares		1,040,203		1,046,063
	METTLER-TOLEDO INTL INC		2,430.00	Shares		616,192		1,017,101
	MIDDLEBY CORP		6,474.00	Shares		575,889		833,916
	NU SKIN ENTERPRISES CL A		5,147.00	Shares		222,937		245,924
	OLD DOMINION FREIGHT LINE		16,294.00	Shares		889,891		1,397,862
	PANDORA MEDIA INC		24,407.00	Shares		396,567		318,267
	REPLIGEN		3,935.00	Shares		93,823		121,277
	SBA COMM CORP CL A		8,610.00	Shares		682,896		889,069
	SIGNATURE BANK		6,880.00	Shares		781,792		1,033,376
	SITEONE LANDSCAPE SUPPLY		10,780.00	Shares		360,105		374,389

5

Page 6 of 10

Ameren Corporation Savings Investment Plan

SCHEDULE H, Line 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)

December 31, 2016

Name of plan sponsor: Ameren Corporation

Employer identification number: 43-1723446

Three-digit plan number: 003

(a)	(b)	(c)			(d)		(e)
	Identity of issue, borrower,	Description of investment including maturity date,					Current
	lessor, or similar party	rate of interest, collateral, par, or maturity value			Cost		value
	SIX FLAGS ENTERTAINMENT		21,780.00	Shares		887,286		1,305,929
	TAKE-TWO INTERACTV SOFTWR		12,430.00	Shares		511,975		612,675
	TORO CO		11,294.00	Shares		384,108		631,899
	TRACTOR SUPPLY CO.		17,280.00	Shares		1,196,036		1,309,997
	TRANSDIGM GROUP INC		3,321.00	Shares		633,163		826,796
	2U INC		19,098.00	Shares		376,257		575,805
	ULTA BEAUTY INC		2,920.00	Shares		479,338		744,425
	UNIVERSAL ELECTRONICS INC		9,210.00	Shares		617,120		594,506
	VAIL RESORTS INC		1,755.00	Shares		284,568		283,099
	VANTIV INC		14,969.00	Shares		505,699		892,452
	VEEVA SYS INC CL A		20,870.00	Shares		630,898		849,409
	VIRTU FINANCIAL INC CL A		16,227.00	Shares		354,692		258,821
	WD 40 CO		5,620.00	Shares		492,479		656,978
	WNS HLDGS LTD SP ADR		15,913.00	Shares		295,055		438,403
	WESTINGHOUSE AIR BRAKE TE		7,270.00	Shares		590,254		603,554
	Total Common Stocks					372,774,662		492,317,641
	U.S. Government Securities
	USTB 4.625% 2/15/40		250,000.00	Shares		318,008		318,922
	FANNIEMAE 30YR 3% 10/46#AS8186		668,983.58	Shares		692,424		665,247
	FHLG 30YR 3% 03/45#G08631		670,612.81	Shares		670,508		666,919
	FNMA 5.00% 5/38 #983077		242,515.05	Shares		268,282		265,933
	FNMA 3.5% 09/45#AS5722		267,202.18	Shares		280,061		273,954
	FNMA 30YR 3% 01/47 #TBA		915,000.00	Shares		909,819		908,852
	FNMA 30YR 3% 08/46#AS7737		659,217.48	Shares		684,453		655,535
	FNMA 30YR 3% 11/46#MA2806		233,491.93	Shares		240,460		232,188
	FNMA 30YR 3.0% 5/43#AT2722		371,762.94	Shares		387,795		370,848
	FNMA 30YR 3.5% 01/01/45#MA2163		600,531.09	Shares		621,550		615,705
	FNMA 30YR 3.5% 01/47 #TBA		1,960,000.00	Shares		2,010,645		2,007,917
	FNMA 30YR 3.5% 05/46#AS7245		308,065.16	Shares		325,827		315,873
	FNMA 30YR 3.5% 06/46#AS7348		652,270.23	Shares		673,571		669,465
	FNMA 30YR 3.5% 07/46#AS7544		1,119,702.53	Shares		1,142,792		1,148,170
	FNMA 30YR 4% 01/47 #TBA		435,000.00	Shares		457,447		457,022
	FNMA 30YR 4% 03/45#AS4630		500,413.21	Shares		531,376		526,939
	FNMA 30YR 4% 11/46#MA2808		652,307.17	Shares		680,642		686,630
	FNMA 30YR 4% 12/01/45#MA2484		636,385.31	Shares		679,142		668,925
	FNMA 30YR 4.0% 07/45#AS5380		635,572.30	Shares		679,566		669,858
	FNMA 30YR 4.0% 12/01/44#AX4873		424,754.68	Shares		451,169		447,270
	FNMA 30YR 4.5% 01/47 #TBA		1,475,000.00	Shares		1,587,469		1,585,155
	Total U.S. Government Securities					14,293,006		14,157,327
	Corporate debt securities
	UBS 7.125 PERP-20 AT1 7%		200,000.00	Shares		210,500		205,675
	AFLAC INC 6.45% 8/15/40		61,000.00	Shares		76,431		79,753
	AT&T INC 5.55% 8/15/41		170,000.00	Shares		178,396		176,697
	AT&T INC 3.8% 03/15/22		340,000.00	Shares		345,957		348,197
	APX GROUP 7.875% 12/01/22		55,000.00	Shares		55,000		59,538
	AECOM 5.75% 10/15/2022 W/I		65,000.00	Shares		67,593		68,705
	AGRIUM INC 3.375% 03/15/25		200,000.00	Shares		194,888		193,479
	ALCOA INC MTN 5.4% 4/15/21		75,000.00	Shares		81,644		79,500
	ALLEGHENY TECH STEP 8/15/23		55,000.00	Shares		57,448		53,900
	ALLSTATE CORP 5.75 8/53		130,000.00	Shares		140,595		134,407
	ALLY FINL INC 5.75% 11/20/25		135,000.00	Shares		131,593		134,663
	ALTICE FING 6.625% 2/23 144A		65,000.00	Shares		64,350		66,788
	ALTRIA GROUP INC 2.85% 8/09/22		110,000.00	Shares		107,606		110,014

6

Page 7 of 10

Ameren Corporation Savings Investment Plan

SCHEDULE H, Line 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)

December 31, 2016

Name of plan sponsor: Ameren Corporation

Employer identification number: 43-1723446

Three-digit plan number: 003

(a)	(b)	(c)			(d)		(e)
	Identity of issue, borrower,	Description of investment including maturity date,					Current
	lessor, or similar party	rate of interest, collateral, par, or maturity value			Cost		value
	AMERICAN EXPRESS 5.2% VAR PERP		135,000.00	Shares		135,844		133,988
	AMERICAN TOWER CORP 5% 2/24		150,000.00	Shares		161,078		161,323
	ANADARKO MTN 6.2% 3/15/40		90,000.00	Shares		104,194		102,911
	ANGLOGOLD HLDNGS MTN 6.5% 4/40		95,000.00	Shares		89,765		85,500
	ANHEUSER-BUSCH 3.65% 2/1/26		215,000.00	Shares		221,757		217,930
	ANIXTER INC 5.125% 10/01/2021		65,000.00	Shares		67,763		67,600
	APACHE CORP 4.25% 1/15/44		150,000.00	Shares		134,948		147,582
	APPLE INC 3.85% 5/4/43		150,000.00	Shares		136,974		143,148
	AUTONATION INC 4.5% 10/01/25		105,000.00	Shares		110,259		106,091
	AVIS BUDGET 6.375% 04/24 144A		55,000.00	Shares		55,000		54,931
	BAE SYSTEMS 3.85% 12/25 144A		135,000.00	Shares		133,407		137,499
	BNP PARIBAS VR/7.625% PRP 144A		270,000.00	Shares		270,000		284,877
	BNP PARIBAS 4.375 5/12/26 144A		200,000.00	Shares		199,648		197,120
	BANK OF AMR CORP 6.3% VAR PERP		95,000.00	Shares		95,000		99,275
	BANK AMER FDG CORP 4% 04/01/24		305,000.00	Shares		314,634		314,199
	BANK AMER CORP 4.25% 10/22/26		105,000.00	Shares		105,044		106,117
	BANK OF AMER 3.248% 10/21/27		240,000.00	Shares		225,823		228,753
	BARCLAYSPLC 3.65% 03/16/25		285,000.00	Shares		277,878		275,544
	BAXALTA INC 4% 06/23/25		220,000.00	Shares		218,513		220,363
	BECTON DICKINS 3.734% 12/15/24		63,000.00	Shares		64,121		64,369
	BROOKFIELD RESI 6.5% 12/15/20		45,000.00	Shares		46,517		46,013
	BUNGE LTD FIN 3.25% 8/15/26		140,000.00	Shares		139,870		134,239
	CBS CORP 4% 01/15/26		115,000.00	Shares		112,574		116,803
	CIT GROUP INC 5.0% 08/01/23		85,000.00	Shares		87,040		87,763
	CALIF RES 8.0% 12/15/22 144A		30,000.00	Shares		35,618		26,700
	CALUMET SPEC PD 6.5% 04/15/21		55,000.00	Shares		55,402		46,613
	CAPITAL ONE FIN PERP		135,000.00	Shares		137,869		136,688
	CAPITAL ONE BK 3.375% 2/15/23		180,000.00	Shares		178,151		178,132
	CASCADES INC 5.75% 07/23 144A		75,000.00	Shares		70,500		76,125
	CENTURYLINK INC 6.75% 12/23 W		150,000.00	Shares		160,875		153,375
	CCO LLC/CAPITL 4.908% 07/23/25		100,000.00	Shares		100,000		105,262
	CITIGROUP INC 3.875% 10/25/23		105,000.00	Shares		109,032		108,072
	CITIGROUP INC 3.75% 06/16/24		105,000.00	Shares		107,771		106,812
	CITIGROUP 4.3% 11/26		190,000.00	Shares		191,763		191,497
	CITIGROUP INC 3.3% 04/27/25		225,000.00	Shares		232,081		220,148
	CITIGROUP INC 6.25% VAR PERP		110,000.00	Shares		110,000		113,190
	CITIGROUP 3.2% 10/21/26		95,000.00	Shares		89,742		90,704
	COMCAST CORP 6.4% 5/15/38		80,000.00	Shares		100,078		102,278
	CONOCOPHILLIPS 6.5% 2/01/39		70,000.00	Shares		88,362		88,473
	CONSTELATION ENERGY5.15% 12/20		125,000.00	Shares		138,075		135,037
	CONTINENTAL OK 5% 9/15/22		85,000.00	Shares		84,937		85,798
	RABOBK NEDERLND 3.95% 11/09/22		250,000.00	Shares		262,088		256,894
	COX COMM 3.35% 9/15/26 144A		115,000.00	Shares		114,554		109,654
	CROWN CASTLE 3.7% 6/15/26		90,000.00	Shares		89,726		88,211
	CUMMINS INC 4.875% 10/01/43		120,000.00	Shares		132,666		133,246
	DISCOVER BANK 4.25% 03/13/26		250,000.00	Shares		251,320		254,329
	DISH DBS 5.125% 5/1/20		75,000.00	Shares		75,188		77,625
	DOMTAR CORP 6.75% 02/15/44		190,000.00	Shares		206,448		192,701
	DYNEGY INC 8% 01/15/25 144A		55,000.00	Shares		55,300		51,563
	ELECTRICITE DE PERP 12/49 144A		160,000.00	Shares		165,800		150,400
	EBAY INC 3.8% 03/09/2022		155,000.00	Shares		154,784		159,977
	ENDO FIN CO 5.75% 1/15/22 144A		90,000.00	Shares		92,205		79,425
	ENLINK MIDSTRM LP 4.15% 6/25		140,000.00	Shares		137,284		135,719
	FEDEX CORP 3.25% 04/01/2026		120,000.00	Shares		119,755		119,004
	FIRSTENERGY 4.35% 01/25 144A		130,000.00	Shares		135,715		134,344

7

Page 8 of 10

Ameren Corporation Savings Investment Plan

SCHEDULE H, Line 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)

December 31, 2016

Name of plan sponsor: Ameren Corporation

Employer identification number: 43-1723446

Three-digit plan number: 003

(a)	(b)	(c)			(d)		(e)
	Identity of issue, borrower,	Description of investment including maturity date,					Current
	lessor, or similar party	rate of interest, collateral, par, or maturity value			Cost		value
	FORD MTR CR LLC 4.25% 9/20/22		210,000.00	Shares		222,119		216,127
	FRONTIER COMM 8.5% 4/15/20		80,000.00	Shares		85,880		84,000
	GEO GROUP INC 6% 04/15/26		65,000.00	Shares		66,138		63,863
	GENERAL ELECTRIC 5.0%/VAR PERP		469,000.00	Shares		422,100		486,681
	GENWORTH HLDGS 4.8% 02/15/24		55,000.00	Shares		48,247		44,825
	GOLDMAN SACHS GP 5.75% 1/24/22		360,000.00	Shares		414,360		404,334
	GOLDMAN SCHS GRP INC 4% 3/3/24		390,000.00	Shares		411,405		404,135
	GOLDMAN SACH GP 4.25% 10/21/25		85,000.00	Shares		84,405		86,231
	GOLDMAN SACHS GROUP STEP PERP		90,000.00	Shares		90,000		86,288
	GUITR CN INC 6.5% 4/15/19 144A		45,000.00	Shares		41,288		40,838
	HSBC HLDGS PLC 6.8% 6/01/38		190,000.00	Shares		243,755		240,241
	HARMAN INTL IND 4.15% 05/15/25		165,000.00	Shares		165,774		170,137
	HESS CORP 3.5% 7/15/24		80,000.00	Shares		78,254		76,909
	HP ENTERPRISE CO VAR 10/15/25		255,000.00	Shares		253,067		262,015
	HOLLY ENR PRTN 6% 08/24 144A		45,000.00	Shares		45,000		46,913
	INTL PAPER CO GLB 8.7 6/15/38		145,000.00	Shares		202,336		209,391
	JPMC CO 6.4% 5/15/38		110,000.00	Shares		139,787		142,310
	JPMORGAN CHASE 3.2% 1/25/23		125,000.00	Shares		125,023		126,265
	JPM CHASE 6.75% PERP		245,000.00	Shares		267,026		263,988
	JPMORGAN CHASE 2.95% 10/01/26		95,000.00	Shares		89,441		90,538
	KINDER MORGAN 4.25% 09/01/24		105,000.00	Shares		105,177		107,325
	KRAFT HEINZ CO 4.375% 6/1/46		125,000.00	Shares		124,605		117,389
	L3 COMM 3.85% 12/15/26		110,000.00	Shares		109,438		109,178
	LYB INTL FIN BV 4.0% 07/15/23		170,000.00	Shares		178,852		176,915
	HOLCIM US FI 3.5% 9/22/26 144A		200,000.00	Shares		199,832		193,494
	LAND O LAKES INC 8% PERP 144A		125,000.00	Shares		125,000		127,500
	LAZARD GROUP LLC 3.625% 3/1/27		290,000.00	Shares		288,750		275,129
	LENNAR CORP 4.75% 04/01/21		50,000.00	Shares		50,000		51,625
	LEVEL 3 FIN 5.25% 3/15/26 144A		90,000.00	Shares		90,000		89,100
	LEVI STRAUSS & CO 5% 5/1/25		100,000.00	Shares		97,000		100,000
	LIBERTY MUTUAL 4.95% 5/22 144A		405,000.00	Shares		441,503		441,457
	LIFEPOINT 5.375% 5/1/24 144A		60,000.00	Shares		60,038		58,770
	MGM RESORTS INTL 6.0% 03/15/23		65,000.00	Shares		67,600		70,200
	MPLX LP 4.875% 06/01/25		155,000.00	Shares		158,892		159,168
	MARTIN MARIETTA MAT 4.25% 7/24		150,000.00	Shares		150,357		152,229
	MARTIN PRT/FIN 7.25% 2/21		35,000.00	Shares		35,035		34,563
	MDAMERICAN ENR 6.125% 4/01/36		160,000.00	Shares		193,136		199,519
	MILLICOM INTL 6.625 10/21 144A		90,000.00	Shares		95,733		94,458
	MORGAN STANLEY 4% 07/23/25		425,000.00	Shares		448,154		435,058
	MORGAN STANLEY 5.5% 7/28/21		195,000.00	Shares		222,984		215,899
	MORGAN STANLEY 3.95% 04/23/27		315,000.00	Shares		299,086		311,344
	NCR CORP NEW 6.375% 12/15/23		80,000.00	Shares		83,360		86,000
	NABORS INDUS 5.5% 1/15/23 144A		120,000.00	Shares		120,750		124,950
	NBCUNIVERSAL MEDIA 2.875% 1/23		175,000.00	Shares		180,623		174,405
	NBCUNIVERSAL ME 4.45% 1/15/43		170,000.00	Shares		168,842		173,385
	NEWELL RUBBERMAID 4.2% 4/1/26		130,000.00	Shares		132,899		135,506
	NORDEA BANK AB 6.125 PERP 144A		200,000.00	Shares		205,960		193,540
	NOVA CHEMICALS 5.25% 8/23 144A		105,000.00	Shares		108,413		106,050
	SFR GROUP SA 6.0% 5/15/22 144A		60,000.00	Shares		61,050		61,575
	ORIGIN ENGY 3.5% 10/09/18 144A		200,000.00	Shares		204,738		202,316
	OWENS CORNING 4.2% 12/15/22		200,000.00	Shares		205,808		207,483
	PACIFIC LIFECRP 6% 2/20 144A		170,000.00	Shares		192,923		183,572
	PACKAGING CORP 3.65% 09/15/24		120,000.00	Shares		119,611		120,350
	PENTAIR FINANCE 4.65% 9/15/25		150,000.00	Shares		149,739		153,661
	PETRO-CANADA 6.8% 5/15/38		105,000.00	Shares		136,072		135,950

8

Page 9 of 10

Ameren Corporation Savings Investment Plan

SCHEDULE H, Line 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)

December 31, 2016

Name of plan sponsor: Ameren Corporation

Employer identification number: 43-1723446

Three-digit plan number: 003

(a)	(b)	(c)			(d)		(e)
	Identity of issue, borrower,	Description of investment including maturity date,					Current
	lessor, or similar party	rate of interest, collateral, par, or maturity value			Cost		value
	PEMEX 5.375% 03/13/22 144A		130,000.00	Shares		129,280		133,117
	PIEDMONT OPERTG 4.45% 03/15/24		185,000.00	Shares		190,276		184,066
	PILGRIMS PRIDE 5.75% 3/25 144A		65,000.00	Shares		66,287		64,838
	PLATFORM SPECLTY 6.5 2/22 144A		100,000.00	Shares		104,730		100,750
	POLYONE CORP 5.25 3/15/23		90,000.00	Shares		91,575		91,350
	PRINCIPAL FN GR 4.75%/VAR 5/55		180,000.00	Shares		179,978		176,400
	PRUDENTIAL FN 5.2%/VAR 3/15/44		165,000.00	Shares		166,219		163,048
	PULTE GROUP INC 5.5% 03/01/26		65,000.00	Shares		65,000		64,513
	QUEST DIAGNOSTI 4.25% 04/01/24		145,000.00	Shares		151,412		151,065
	QWEST CORP 6.75% 12/01/21		165,000.00	Shares		185,757		179,025
	REALOGY GROUP 5.25% 12/21 144A		85,000.00	Shares		85,213		87,125
	RELIANCE HDG USA 5.4 2/22 144A		250,000.00	Shares		270,253		270,276
	RESOLUTE FST PROD 5.875% 05/23		135,000.00	Shares		123,930		121,500
	REYNOLDS GRP 5.125% 7/23 144A		75,000.00	Shares		75,188		76,594
	ROCK TENN COMP 4.9% 3/22		205,000.00	Shares		222,681		222,535
	ROYAL BK SC 6.1% 6/10/23		105,000.00	Shares		113,881		109,798
	SES 3.6% 04/04/23 144A		160,000.00	Shares		164,085		156,064
	SABINE PASS 5.625% 2/1/21		180,000.00	Shares		187,200		192,600
	SANTANDER UK PLC 5% 11/23 144A		200,000.00	Shares		209,728		203,465
	SIGNET UK FINAN 4.7% 06/15/24		275,000.00	Shares		282,051		263,245
	SOCGEN 5% 01/17/24 144A		240,000.00	Shares		246,223		243,445
	SOFTBANK CRP 4.5% 4/15/20 144A		100,000.00	Shares		102,950		102,500
	SOUTHWESTERN EN 4.1% 3/22		95,000.00	Shares		94,990		89,756
	SPRINT CORP 7.25% 9/15/21		65,000.00	Shares		65,617		69,063
	SPRINT SPECTRM 3.36% 9/21 144A		200,000.00	Shares		199,997		200,374
	STANDARD CHART 5.7% 03/44 144A		200,000.00	Shares		218,448		199,408
	SUNTRUST BNK 5.625% VAR PRP F		140,000.00	Shares		142,100		143,325
	SYMETRA 4.25% 07/15/24		105,000.00	Shares		106,882		103,633
	SYNCHRONY FIN 4.25% 08/15/24		165,000.00	Shares		167,143		167,769
	SYSCO CORP 3.3% 07/15/2026		135,000.00	Shares		134,491		132,284
	T-MOBILE USA INC 6.731% 4/22		120,000.00	Shares		127,740		125,400
	TARGA RES LP/FI 4.25% 11/15/23		60,000.00	Shares		57,825		57,375
	TENET HEALTH 4.375% 10/01/21		20,000.00	Shares		19,900		19,825
	TENET HEALTH 7.5% 1/1/22 144A		30,000.00	Shares		30,350		31,275
	TEVA PHARM NE 3.15% 10/01/26		140,000.00	Shares		139,628		128,876
	TIME WARNER INC 3.875% 1/15/26		130,000.00	Shares		129,936		129,960
	TOTAL SYSTEM SE 3.75% 06/01/23		195,000.00	Shares		195,382		193,474
	TRANSOCEAN INC VAR 10/15/22		80,000.00	Shares		64,487		70,200
	TRIBUNE MEDIA 5.875% 7/15/22		85,000.00	Shares		84,150		86,381
	21ST CENTY FOX 6.65% 11/15/37		285,000.00	Shares		353,466		350,177
	TYSON FOODS INC 3.95% 08/15/24		160,000.00	Shares		163,694		162,818
	UNITED RENTALS NRT 5.875% 9/26		30,000.00	Shares		30,000		30,863
	UNITED HEALTH 4.75% 7/15/45		100,000.00	Shares		101,543		109,941
	UNITYMEDIA 6.125% 1/25 144A		60,000.00	Shares		62,624		61,649
	UNUM GROUP 4% 03/15/24		115,000.00	Shares		119,183		115,336
	VALERO ENERGY CO 3.4% 9/15/26		140,000.00	Shares		138,290		133,922
	VERIZON COMM 4.862% 8/21/46		135,000.00	Shares		147,523		136,527
	VERIZON COM 3.5% 11/01/24		215,000.00	Shares		214,124		214,044
	VERIZON COMM 4.125% 8/15/46		100,000.00	Shares		99,946		90,318
	VOYA FIN INC 3.65% 6/15/26		120,000.00	Shares		119,650		117,163
	WESTERN DIGI 7.375% 4/23 144A		80,000.00	Shares		81,218		87,999
	WOODSIDE FIN 3.65% 3/5/25 144A		140,000.00	Shares		135,663		136,588
	WYNN MACAU 5.25% 10/15/21 144A		140,000.00	Shares		136,324		141,049
	XSTRATA FIN 6.9% 11/15/37 144A		60,000.00	Shares		67,320		65,840
	XLIT LTD 4.45% 03/31/2025		220,000.00	Shares		218,954		217,872

9

Page 10 of 10

Ameren Corporation Savings Investment Plan

SCHEDULE H, Line 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)

December 31, 2016

Name of plan sponsor: Ameren Corporation

Employer identification number: 43-1723446

Three-digit plan number: 003

(a)	(b)	(c)				(d)		(e)
	Identity of issue, borrower,	Description of investment including maturity date,						Current
	lessor, or similar party	rate of interest, collateral, par, or maturity value				Cost		value
	Total Corporate debt securities						25,892,591		25,756,145
	Other Debt Securities
	MEXICO GOVT 8.5% 12/13/18		3,700,000.00		Shares		4,121,960		183,650
	BACM 2015-UBS7 D 3.167% 9/48		160,000.00		Shares		117,675		121,000
	COMM 2016-STAV B 0% 10/34 144A		210,000.00		Shares		210,000		210,988
	CWALT 2003-J3 1A3 5.25% 11/33		159,530.33		Shares		161,425		161,233
	GAAFT 16-T1 DT1 4.0575% 10/48		130,000.00		Shares		129,999		128,972
	GPPT 14-GPP A 1ML+.95% 02/		232,924.17		Shares		233,070		233,430
	GSMS 14-GSFL C 1ML+225 7/31		280,000.00		Shares		280,000		277,721
	GSMS 2015-GC32 D 3.345% 07/48		225,000.00		Shares		163,863		167,475
	MSBAM 15-C22 D 4.24368% 05/46		140,000.00		Shares		111,464		107,714
	WFCM 15-C26 D 3.586% 02/48 144		155,000.00		Shares		108,791		109,418
	WFCM 2015-C29 A4 3.637% 06/48		300,000.00		Shares		306,633		309,533
	WFRBS 2013-C15 D CSTR 8/46		160,000.00		Shares		146,675		139,955
	BAYV 2006-D 1A3 5.932% 12/36		125,440.21		Shares		124,499		125,802
	COMET 2016-A4 A4 1.33% 6/15/22		540,000.00		Shares		531,816		532,757
	CCCIT 2014-A1 A1 2.88% 01/23		375,000.00		Shares		383,921		384,675
	CAH 14-1A B 1ML+135 05/31		350,000.00		Shares		338,297		348,458
	CSH 16-1A D 1193476+3.1% 07/33		145,000.00		Shares		145,000		147,267
	IHSFR 14-SFR1 B 1ML+150 6/31		350,000.00		Shares		339,637		349,580
	IHSFR 14-SFR1 D 1ML+260 6/31		175,000.00		Shares		177,208		174,999
	NRART 16-T1 DT1 4.3768% 06/49		220,000.00		Shares		220,000		219,206
	OMART 2016-T2 DT2 4.45% 08/49		225,000.00		Shares		225,000		224,507
	DALLAS TX DART 5% 12/01/46		205,000.00		Shares		228,719		229,680
	MA ST 5% 12/01/36		275,000.00		Shares		315,222		320,029
	NYC TFA (PIT) 5% 02/01/35		80,000.00		Shares		90,588		91,462
	NYC TFA (PIT) 5% 05/01/36		75,000.00		Shares		84,900		85,804
	NYS DORM PIT 5% 02/15/39		115,000.00		Shares		129,057		131,291
	US 5YR NOTE(CBT)FUT MAR17 FVH7		(3.00	)	Shares		—		(492	)
	US 10YR NOTE (CBT)MAR17 TYH7		(19.00	)	Shares		—		(6,532	)
	US ULTRA BOND FUT MAR17 WNH7		(3.00	)	Shares		—		(2,906	)
	CME CDX CXPHY527 5% 12/20/21		(1,500,000.00	)	Shares		—		(1,209	)
	US LONG BOND(CBT) MAR17 USH7		2.00		Shares		—		1,500
	CITI CDX NA HY 27 BP 12/21 CME		1,500,000.00		Shares		—		1,210
	Total Other Debt Securities						9,425,419		5,508,177
	Notes Receivable
* / **	Participants		Participant Loans				33,187,004		33,187,004
						$	1,919,647,724	$	2,127,004,396

* Investment represents allowable transaction with a party-in-interest.

** Interest rates vary from 4.00% to 10.50% on loans maturing through 2027.

10

SIGNATURE

The Plan. Pursuant to the requirements of the Securities Exchange Act of 1934, the trustee (or other persons who administer the employee benefit plan) has duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.

AMEREN CORPORATION
SAVINGS INVESTMENT PLAN
AMEREN SERVICES COMPANY
(Administrator)
By	/s/ Martin J. Lyons, Jr.
	Martin J. Lyons, Jr.
	Chairman and President
	Ameren Services Company

June 23, 2017

EXHIBIT INDEX

Exhibit No.	Description
23.1	Consent of Independent Registered Public Accounting Firm