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<title>Ameresco, Inc. Annual report pursuant to Section 13 and 15(d)</title>
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    <h3>Annual report pursuant to Section 13 and 15(d)</h3>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2911">Audit Information</a></li>
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                        <a class="menu-item " href="/sec-filings/annual-reports/xbrl_doc_only/2912">Financial Statements</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2914">Consolidated Statements of Income</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2915">Consolidated Statements of Comprehensive Income</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2916">Consolidated Statement of Comprehensive Income (Parenthetical)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2917">Consolidated Statements of Changes in Redeemable Non-controlling Interests and Stockholders' Equity</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2918">Consolidated Statements of Changes in Redeemable Non-controlling Interests and Stockholders' Equity (Parenthetical)</a></li>
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                        <a class="menu-item " href="/sec-filings/annual-reports/xbrl_doc_only/2920">Notes to Financial Statements</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2920">Description of Business</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2921">Summary of Significant Accounting Policies</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2922">Revenue from Contracts with Customers</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2923">Business Acquisitions and Related Transactions</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2924">Goodwill and Intangible Assets, Net</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2925">Property and Equipment, Net</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2926">Energy Assets, Net</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2927">Leases</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2928">Debt and Financing Lease Liabilities</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2929">Income Taxes</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2930">Variable Interest Entities and Equity Method Investments</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2931">Redeemable Non-Controlling Interests</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2932">Equity and Earnings Per Share</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2933">Stock-Based Compensation and Other Employee Benefits</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2934">Commitments and Contingencies</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2935">Geographic Information</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2936">Other Expenses, Net</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2937">Fair Value Measurement</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2938">Derivative Instruments and Hedging Activities</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2939">Business Segment Information</a></li>
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                        <a class="menu-item " href="/sec-filings/annual-reports/xbrl_doc_only/2940">Accounting Policies</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2940">Summary of Significant Accounting Policies (Policies)</a></li>
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                        <a class="menu-item " href="/sec-filings/annual-reports/xbrl_doc_only/2941">Notes Tables</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2941">Summary of Significant Accounting Policies (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2942">Revenue from Contracts with Customers (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2943">Business Acquisitions and Related Transactions (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2944">Goodwill and Intangible Assets, Net (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2945">Property and Equipment, Net (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2946">Energy Assets, Net (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2947">Leases (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2948">Debt and Financing Lease Liabilities (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2949">Income Taxes (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2950">Variable Interest Entities and Equity Method Investments (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2951">Redeemable Non-Controlling Interests (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2952">Equity and Earnings Per Share (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2953">Stock-Based Compensation and Other Employee Benefits (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2954">Geographic Information (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2955">Other Expenses, Net (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2956">Fair Value Measurement (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2957">Derivative Instruments and Hedging Activities (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2958">Business Segment Information (Tables)</a></li>
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                        <a class="menu-item current" href="/sec-filings/annual-reports/xbrl_doc_only/2959">Notes Details</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2959">Summary of Significant Accounting Policies - Principles of Consolidation (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2960">Summary of Significant Accounting Policies - Use of Estimates (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2961">Summary of Significant Accounting Policies - Significant Risks and Uncertainties (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2962">Summary of Significant Accounting Policies - Accounts Receivable (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2963">Summary of Significant Accounting Policies - Project Development Costs?? (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2964">Summary of Significant Accounting Policies - Property and Equipment (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2965">Summary of Significant Accounting Policies - Energy Assets (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2966">Summary of Significant Accounting Policies - Goodwill and Intangible Assets (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2967">Summary of Significant Accounting Policies - Sales Leaseback (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2968">Summary of Significant Accounting Policies - Revenue Recognition (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2969">Summary of Significant Accounting Policies - Financial Instrument (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2970">Summary of Significant Accounting Policies - Share Repurchase Program (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2971">Summary of Significant Accounting Policies - Redeemable Non-Controlling Interest (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2972">Revenue from Contracts with Customers - Disaggregation of Revenue (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2973">Revenue from Contracts with Customers - Contract Balances (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2974">Revenue from Contracts with Customers - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2975">Revenue from Contracts with Customers - Consolidated Statements of Income (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2976">Business Acquisitions and Related Transactions - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2977">Business Acquisitions and Related Transactions - Purchase Price Allocation (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2978">Goodwill and Intangible Assets, Net - Goodwill (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2979">Goodwill and Intangible Assets, Net - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2980">Goodwill and Intangible Assets, Net - Intangible Assets (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2981">Goodwill and Intangible Assets, Net - Amortization (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2982">Goodwill and Intangible Assets, Net - Future Amortization (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2983">Property and Equipment, Net (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2984">Energy Assets, Net - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2985">Leases - Narrative (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2986">Leases - Rent and Related Expenses (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2987">Leases - Supplemental Balance Sheet Information Related to Leases (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2988">Leases - Lease Cost (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2989">Leases - Supplemental of Cash Flow (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2990">Leases - Minimum Future Lease Obligations (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2991">Leases - Amounts Related to Sale Leaseback (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2992">Debt and Financing Lease Liabilities - Schedule of Long-Term Debt (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2993">Debt and Financing Lease Liabilities - Schedule of Maturities (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2994">Debt and Financing Lease Liabilities - Senior Secured Credit Facility - Revolver and Term Loan (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2995">Debt and Financing Lease Liabilities - Outstanding Credit Facility Amounts (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2996">Income Taxes - Domestic and foreign income taxes (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2997">Income Taxes - Income tax (benefit) provision (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2998">Income Taxes - Deferred income tax assets and liabilities (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/2999">Income Taxes - Valuation Allowance (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3000">Income Taxes - Tax Loss and Credit Carryforwards (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3001">Income Taxes - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3002">Income Taxes - Reconciliation of Effective Tax Rates (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3003">Income Taxes - Unrecognized Tax Benefits (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3004">Variable Interest Entities and Equity Method Investments - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3005">Variable Interest Entities and Equity Method Investments - Schedule of Variable Interest Entity Financial Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3006">Variable Interest Entities and Equity Method Investments - Investment in Joint Ventures (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3007">Redeemable Non-Controlling Interests (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3008">Equity and Earnings Per Share - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3009">Equity & Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3010">Stock-Based Compensation and Other Employee Benefits - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3011">Stock-Based Compensation and Other Employee Benefits - Stock Options Activity (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3012">Stock-Based Compensation and Other Employee Benefits - Forth Additional Plans (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3013">Stock-Based Compensation and Other Employee Benefits - Fair Value Assumptions (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3014">Stock-Based Compensation and Other Employee Benefits - Matching Contributions (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3015">Commitments and Contingencies (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3016">Geographic Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3017">Other Expenses, Net (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3018">Other Expenses, Net - Deferred Financing Costs (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3019">Fair Value Measurement - Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3020">Fair Value Measurement - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3021">Fair Value Measurement - Fair Value of Contingent Liabilities (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3022">Fair Value Measurement - Fair Value and Carrying Value of Long-term Debt (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3023">Derivative Instruments and Hedging Activities - Fair Value of Derivative Instruments on the Balance Sheet (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3024">Derivative Instruments and Hedging Activities - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3025">Derivative Instruments and Hedging Activities - Effects on statements of income and consolidated statements of comprehensive income (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3026">Derivative Instruments and Hedging Activities - Effects of Derivative Instruments in Accumulated Other Comprehensive Income (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3027">Derivative Instruments and Hedging Activities - Summary of Active Derivative Instruments (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3028">Business Segment Information - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3029">Business Segment Information - Segment Information (Details)</a></li>
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        <h4>Goodwill and Intangible Assets, Net - Future Amortization (Details)</h4>
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