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Ameren Corporation

2014 Omnibus Incentive Compensation Plan

January 1, 2016

THIS AGREEMENT, effective January 1, 2016, represents the grant of Performance Share Units by Ameren Corporation (the “Company”), to the Participant named below, pursuant to the provisions of the Ameren Corporation 2014 Omnibus Incentive Compensation Plan (as the same may be amended from time to time, the “Plan”).

The Plan provides a description of the terms and conditions governing the Performance Share Units. If there is any inconsistency between the terms of this Agreement and the terms of the Plan, the Plan’s terms will completely supersede and replace the conflicting terms of this Agreement. All capitalized terms will have the meanings ascribed to them in the Plan, unless specifically set forth otherwise herein. The parties hereto agree as follows:

1.    Grant Information. The individual named below has been selected to be a Participant in the Plan, as specified below:

(a)    Participant:

(b)    Target Number of Performance Share Units:

2.    Performance Period. The performance period begins on January 1, 2016, and ends on December 31, 2018 (“Performance Period”).

3.    Performance Grid. The number of Performance Share Units payable to the Participant under this Agreement will be determined in accordance with the following grid based on Company performance during the Performance Period. If the actual performance results fall between two of the categories listed below, straight-line interpolation will be used to determine the amount earned. Payouts that otherwise would have been more than 100% of Target will be capped at Target if the Company’s total shareholder return (“TSR”) is negative over the three-year period. TSR shall be calculated in the manner set forth in Exhibit 1 hereto and compared to the peer group identified in Exhibit 1.

4.     Calculation of Performance Share Units. The Committee will determine the number of Performance Share Units payable to the Participant based on the performance of the Company during the Performance Period, calculated using the performance grid set forth in Section 3 of this Agreement. Subject to Sections 5 and 9, payment of any Performance Share Units determined pursuant to this Section is expressly conditioned upon continued employment from January 1, 2016 through the payment date (as determined in Section 6) (the “Vesting Period”). The Participant expressly agrees that no Performance Share Units shall be considered earned under applicable law until the last day of the Vesting Period. Notwithstanding anything in this Agreement to the contrary, the value of vested Performance Share Units, if any, paid to the Participant under this Agreement shall in no event exceed 1.2% of the Company’s cumulative GAAP Net Income for the Performance Period, as determined by the Committee in its sole discretion, subject to the maximum payout amount set forth in Section 4.03(e) of the Plan and the Committee’s right to adjust payment downwards pursuant to Section 12.06 of the Plan.

5.    Vesting of Performance Share Units. Subject to provisions set forth in Section 9 of this Agreement related to a Change of Control (as defined in the Second Amended and Restated Ameren Corporation Change of Control Severance Plan, as amended (the “Change of Control Severance Plan”)) of the Company, Section 10 of this Agreement relating to termination for Cause (as defined in the Change of Control Severance Plan), and Section 11 of this Agreement relating to Participant’s obligations, the Performance Share Units will vest as set forth below:

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Notwithstanding anything in this Agreement to the contrary, no Performance Share Units will be paid to the Participant, nor shall the Participant be entitled to payment, if the Participant’s employment with the Company terminates during the Vesting Period for any reason other than death, Disability, retirement as described above, or on or after a Change of Control in accordance with Section 9.

6.    Form and Timing of Payment. All payments of vested Performance Share Units pursuant to this Agreement will be made in the form of Shares. Except as otherwise provided in this Agreement, payment will be made upon the earlier to occur of the following:

(a)    February, 2019 or as soon as practicable thereafter (but in no event later than March 15, 2019);

(b)    The Participant’s death or as soon as practicable thereafter (but in no event later than March 15 of the calendar year following the year in which the Participant’s death occurred).

7.    Right as Shareholder. Except as specifically set forth in this Agreement, the Participant shall not have voting or any other rights as a shareholder of the Company with respect to Performance Share Units. The Participant will obtain full voting and other rights as a shareholder of the Company upon the payment of the Performance Share Units in Shares as provided in Section 6 or 9 of this Agreement.

8.    Dividends. The Participant shall be entitled to receive dividend equivalents, which represent the right to receive Shares measured by the dividend payable with respect to the corresponding number of Performance Share Units. Dividend equivalents on Performance Share Units will accrue and be reinvested into additional Performance Share Units throughout the three-year Performance Period. The additional Shares will be paid as set forth in Section 6 or 9 of this Agreement. Participants will not be entitled to any dividend equivalent amount on Performance Share Units covered by this Agreement which are not ultimately earned.

9.    Change of Control.

(a)    Company No Longer Exists. Upon a Change of Control which occurs on or before December 31, 2018 in which the Company ceases to exist or is no longer publicly traded on the New York Stock Exchange or the NASDAQ Stock Market, Sections 3, 4, 5 and 6 of this Agreement, unless otherwise provided, shall no longer apply and instead, the amount distributed under this Award shall be based on the Target Number of Performance Share Units awarded as set forth in Section 1(b) of this Agreement plus any accrued dividends and interest as follows:

immediately receive payment under this Award, including interest (if any), upon such termination; and

(b)    Company Continues to Exist. If there is a Change of Control of the Company but the Company continues in existence and remains a publicly traded company on the New York Stock Exchange or the NASDAQ Stock Market, the Performance Share Units will pay out upon the earliest to occur of the following:

(c)    Qualifying Termination. For purposes of Sections 9(a)(vi) and 9(b)(ii) of this Agreement, a qualifying termination means (i) an involuntary termination without Cause, (ii) for Change of Control Severance Plan participants, a voluntary termination of employment for Good Reason (as defined in the Change of Control Severance Plan) or (iii) an involuntary termination that qualifies for severance under the Ameren Corporation Severance Plan for Ameren Employees (as in effect immediately prior to the Change of Control).

(d)    Termination in Anticipation of Change of Control. If a Participant qualifies for benefits as provided in the last sentence of Section 4.1 of the Change of Control Severance Plan, or if a Participant is not a Participant in the Change of Control Severance Plan but is terminated within six (6) months prior to the Change of Control and qualifies for severance benefits under the Company’s general severance plan and the Participant’s termination of employment occurs before the calculated Performance Share Units are paid, then the Participant shall receive (i) upon a Change of Control described in Section 9(a) of this Agreement, an immediate cash payout equal to the value of one Share based on the closing price on the New York Stock Exchange on the last trading day prior to the date of the Change of Control multiplied by the sum of the Target Number of Performance Share Units awarded as set forth in Section 1(b) of this Agreement plus the additional Performance Share Units attributable to accrued dividends or (ii) upon a Change of Control described in Section 9(b) of this Agreement, the payout provided for in Section 9(b) of this Agreement.

10.    Termination for Cause. No distribution of any Shares will be made in the event of a termination of employment for Cause at any time prior to payout of the Shares.

(a)    Detrimental Conduct or Activity. If the Participant engages in conduct or activity that is detrimental to the Company, including but not limited to violating Sections 11(b) and 11(c) of this Agreement, after the Performance Share Units are paid, or if the Company learns of the detrimental conduct or activity after the Performance Share Units are paid, and such conduct occurred less than one year after the Participant’s employment with the Company ended, the following shall apply.

(1)    If the Participant retired, the Participant shall not be entitled to receive payment of any Shares that would otherwise be payable to the Participant with respect to the last award of Performance Share Units granted to the Participant before his termination of employment due to retirement.

(2)    In all other cases, the Participant shall repay to the Company the equivalent of the value of Shares received as of the payment date determined under Section 6 of this Agreement within thirty (30) days of receiving a demand from the Company for the repayment of the award.

(3)    interfere with the performance of any Company employee or independent contractor’s duties for the Company.

(d)    Acknowledgments and Remedies. The Participant acknowledges and agrees that the Confidentiality and Non-Solicitation provisions set forth above are necessary to protect the Company’s legitimate business interests, such as its Confidential Information, goodwill and customer relationships. The Participant acknowledges and agrees that a breach by the Participant of either the Confidentiality or Non-Solicitation provision will cause irreparable damage to the Company for which monetary damages alone will not constitute an adequate remedy. In the event of such breach or threatened breach, the Company shall be entitled as a matter of right (without being required to prove damages or furnish any bond or other security) to obtain a restraining order, an injunction, or other equitable or extraordinary relief that restrains any further violation or threatened violation of either the Confidentiality or Non-Solicitation provision, as well as an order requiring the Participant to comply with the Confidentiality and/or Non-Solicitation provisions. The Company’s right to a restraining order, an injunction, or other equitable or extraordinary relief shall be in addition to all other rights and remedies to which the Company may be entitled to in law or in equity, including, without limitation, the right to recover monetary damages for the Participant’s violation or threatened violation of the Confidentiality and/or Non-Solicitation provisions. Finally, the Company shall be entitled to an award of attorneys’ fees incurred in connection with securing any relief hereunder and/or pursuant to a breach or threatened breach of the Confidentiality and/or Non-Solicitation provisions.

12.    Nontransferability. Performance Share Units awarded pursuant to this Agreement may not be sold, transferred, pledged, assigned or otherwise alienated or hypothecated (a “Transfer”) other than by will or by the laws of descent and distribution, except as provided in the Plan. If any Transfer, whether voluntary or involuntary, of Performance Share Units is made, or if any attachment, execution, garnishment, or lien will be issued against or placed upon the Performance Share Units, the Participant’s right to such Performance Share Units will be immediately forfeited to the Company, and this Agreement will lapse.

13.    Requirements of Law. The granting of Performance Share Units under the Plan will be subject to all applicable laws, rules, and regulations, and to such approvals by any governmental agencies or national securities exchanges as may be required.

14.    Tax Withholding. The Company will have the power and the right to deduct or withhold, or require the Participant or the Participant’s beneficiary to remit to the Company, the minimum statutory amount to satisfy federal, state, and local taxes, domestic or foreign, required by law or regulation to be withheld with respect to any taxable event arising as a result of this Agreement.

15.    Stock Withholding. With respect to withholding required upon any taxable event arising as a result of Performance Share Units granted hereunder, the Company, unless notified by the Participant in writing within thirty (30) days prior to the taxable event that the Participant will satisfy the entire minimum tax withholding requirement by means of personal check or other cash equivalent, will satisfy the tax withholding requirement by withholding Shares having a Fair Market Value equal to (i) the total minimum statutory amount required to be withheld on the transaction, or (ii) an amount reflecting such Participant's marginal tax rate, if allowed to be withheld pursuant to the Plan and such withholding would not prevent equity classification of this Award under Generally Accepted Accounting Principles. The Participant agrees to pay to the Company, its Affiliates and/or its Subsidiaries any amount of tax that the Company, its Affiliates and/or its Subsidiaries may be required to withhold as a result of the Participant’s participation in the Plan that cannot be satisfied by the means previously described.

16.    Administration. This Agreement and the Participant’s rights hereunder are subject to all the terms and conditions of the Plan, as the same may be amended from time to time, as well as to such rules and regulations as the Committee may adopt for administration of the Plan. It is expressly understood that the Committee is authorized to administer, construe, and make all determinations necessary or appropriate to the administration of the Plan and this Agreement, all of which will be binding upon the Participant.

17.    Continuation of Employment. This Agreement will not confer upon the Participant any right to continuation of employment by the Company, its Affiliates, and/or its Subsidiaries, nor will this Agreement interfere in any way with the Company’s, its Affiliates’, and/or its Subsidiaries’ right to terminate the Participant’s employment at any time.

18.    Amendment to the Plan. The Plan is discretionary in nature and the Committee may terminate, amend, or modify the Plan; provided, however, that no such termination, amendment, or modification of the Plan may in any way adversely affect the Participant’s rights under this Agreement, without the Participant’s written approval.

19.    Amendment to this Agreement. The Company may amend this Agreement in any manner, provided that no such amendment may adversely affect the Participant’s rights hereunder without the Participant’s written approval.

20.    Successor. All obligations of the Company under the Plan and this Agreement, with respect to the Performance Share Units, will be binding on any successor to the Company, whether the existence of such successor is the result of a direct or indirect purchase, merger, consolidation, or otherwise, of all or substantially all of the business and/or assets of the Company.

21.    Severability. The provisions of this Agreement are severable and if any one or more provisions are determined to be illegal or otherwise unenforceable, in whole or in part, the remaining provisions will nevertheless be binding and enforceable.

22.    Applicable Laws and Consent to Jurisdiction. The validity, construction, interpretation and enforceability of this Agreement will be determined and governed by the laws of the State of Missouri without giving effect to the principles of conflicts of law. For the purpose of litigating any dispute that arises under this Agreement, the parties hereby consent to exclusive jurisdiction and agree that such litigation will be conducted in the federal or state courts of the State of Missouri.

IN WITNESS WHEREOF, the parties have caused this Agreement to be executed effective as of January 1, 2016.

Total Shareholder Return shall be calculated as follows:

*In practice, dividends will be treated as having been reinvested quarterly.

The criteria used to develop the peer group for 2016 - 2018 are shown below**:

**The peer group guidelines were developed to provide objective guidance regarding the appropriate peer group under the PSUP. The Human Resources Committee of the Board of Directors may choose to include additional companies or exclude companies based upon their relevance.

Based on the above, the following are the peer group companies.