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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/3277">Cover Page</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3278">Audit Information</a></li>
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                        <a class="menu-item " href="/sec-filings/annual-reports/xbrl_doc_only/3279">Financial Statements</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3279">Consolidated Balance Sheets</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3280">Consolidated Balance Sheets (Parenthetical)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3281">Consolidated Statements of Income</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3282">Consolidated Statements of Comprehensive Income</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3283">Consolidated Statements of Comprehensive Income (Parenthetical)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3284">Consolidated Statements of Changes in Redeemable Non-controlling Interests and Stockholders' Equity</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3285">Consolidated Statements of Changes in Redeemable Non-controlling Interests and Stockholders' Equity (Parenthetical)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3286">Consolidated Statements of Cash Flows</a></li>
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                        <a class="menu-item current" href="/sec-filings/annual-reports/xbrl_doc_only/3287">Notes to Financial Statements</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3287">Description of Business</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3288">Summary of Significant Accounting Policies</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3289">Revenue from Contracts with Customers</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3290">Business Acquisitions and Related Transactions</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3291">Goodwill and Intangible Assets, Net</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3292">Property and Equipment, Net</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3293">Energy Assets, Net</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3294">Leases</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3295">Debt and Financing Lease Liabilities</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3296">Income Taxes</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3297">Variable Interest Entities and Equity Method Investments</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3298">Redeemable Non-Controlling Interests</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3299">Equity and Earnings Per Share</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3300">Stock-Based Compensation and Other Employee Benefits</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3301">Commitments and Contingencies</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3302">Geographic Information</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3303">Other Expenses, Net</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3304">Fair Value Measurement</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3305">Derivative Instruments and Hedging Activities</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3306">Business Segment Information</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3307">Subsequent Events</a></li>
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                        <a class="menu-item " href="/sec-filings/annual-reports/xbrl_doc_only/3308">Accounting Policies</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3308">Summary of Significant Accounting Policies (Policies)</a></li>
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                        <a class="menu-item " href="/sec-filings/annual-reports/xbrl_doc_only/3309">Notes Tables</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3309">Summary of Significant Accounting Policies (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3310">Revenue from Contracts with Customers (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3311">Business Acquisitions and Related Transactions (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3312">Goodwill and Intangible Assets, Net (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3313">Property and Equipment, Net (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3314">Energy Assets, Net (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3315">Leases (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3316">Debt and Financing Lease Liabilities (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3317">Income Taxes (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3318">Variable Interest Entities and Equity Method Investments (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3319">Redeemable Non-Controlling Interests (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3320">Equity and Earnings Per Share (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3321">Stock-Based Compensation and Other Employee Benefits (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3322">Geographic Information (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3323">Other Expenses, Net (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3324">Fair Value Measurement (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3325">Derivative Instruments and Hedging Activities (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3326">Business Segment Information (Tables)</a></li>
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                        <a class="menu-item " href="/sec-filings/annual-reports/xbrl_doc_only/3327">Notes Details</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3327">Summary of Significant Accounting Policies - Principles of Consolidation (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3328">Summary of Significant Accounting Policies - Use of Estimates (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3329">Summary of Significant Accounting Policies - Accounts Receivable (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3330">Summary of Significant Accounting Policies - Project Development Costs?? (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3331">Summary of Significant Accounting Policies - Property and Equipment (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3332">Summary of Significant Accounting Policies - Energy Assets (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3333">Summary of Significant Accounting Policies - Goodwill and Intangible Assets (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3334">Summary of Significant Accounting Policies - Accrued Expenses and Other Current Liabilities (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3335">Summary of Significant Accounting Policies - Sales Leaseback (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3336">Summary of Significant Accounting Policies - Revenue Recognition (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3337">Summary of Significant Accounting Policies - Financial Instrument (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3338">Summary of Significant Accounting Policies - Share Repurchase Program (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3339">Summary of Significant Accounting Policies - Redeemable Non-Controlling Interest (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3340">Revenue from Contracts with Customers - Disaggregation of Revenue (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3341">Revenue from Contracts with Customers - Contract Balances (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3342">Revenue from Contracts with Customers - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3343">Revenue from Contracts with Customers - Consolidated Statements of Income (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3344">Business Acquisitions and Related Transactions - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3345">Business Acquisitions and Related Transactions - Purchase Price Allocation (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3346">Goodwill and Intangible Assets, Net - Goodwill (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3347">Goodwill and Intangible Assets, Net - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3348">Goodwill and Intangible Assets, Net - Intangible Assets (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3349">Goodwill and Intangible Assets, Net - Amortization (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3350">Goodwill and Intangible Assets, Net - Future Amortization (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3351">Property and Equipment, Net (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3352">Energy Assets, Net - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3353">Leases - Narrative (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3354">Leases - Rent and Related Expenses (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3355">Leases - Supplemental Balance Sheet Information Related to Leases (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3356">Leases - Lease Cost (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3357">Leases - Supplemental of Cash Flow (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3358">Leases - Minimum Future Lease Obligations (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3359">Leases - Amounts Related to Sale Leaseback (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3360">Debt and Financing Lease Liabilities - Schedule of Long-Term Debt (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3361">Debt and Financing Lease Liabilities - Schedule of Maturities (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3362">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/3363">Debt and Financing Lease Liabilities - Outstanding Credit Facility Amounts (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3364">Income Taxes - Domestic and Foreign Income Taxes (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3365">Income Taxes - Income Tax (Benefit) Provision (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3366">Income Taxes - Deferred Income Tax Assets and Liabilities (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3367">Income Taxes - Valuation Allowance (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3368">Income Taxes - Tax Loss and Credit Carryforwards (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3369">Income Taxes - Reconciliation of Effective Tax Rates (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3370">Income Taxes - Unrecognized Tax Benefits (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3371">Income Taxes - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3372">Variable Interest Entities and Equity Method Investments - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3373">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/3374">Variable Interest Entities and Equity Method Investments - Investment in Joint Ventures (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3375">Redeemable Non-Controlling Interests (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3376">Equity and Earnings Per Share - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3377">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/3378">Stock-Based Compensation and Other Employee Benefits - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3379">Stock-Based Compensation and Other Employee Benefits - Stock Options Activity (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3380">Stock-Based Compensation and Other Employee Benefits - Additional Plans (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3381">Stock-Based Compensation and Other Employee Benefits - Fair Value Assumptions (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3382">Stock-Based Compensation and Other Employee Benefits - Restricted Stock Units (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3383">Stock-Based Compensation and Other Employee Benefits - Matching Contributions (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3384">Commitments and Contingencies (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3385">Geographic Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3386">Other Expenses, Net (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3387">Other Expenses, Net - Deferred Financing Costs (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3388">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/3389">Fair Value Measurement - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3390">Fair Value Measurement - Fair Value of Contingent Liabilities (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3391">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/3392">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/3393">Derivative Instruments and Hedging Activities - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3394">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/3395">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/3396">Derivative Instruments and Hedging Activities - Summary of Active Derivative Instruments (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3397">Business Segment Information - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/3398">Business Segment Information - Segment Information (Details)</a></li>
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        <h4>Variable Interest Entities and Equity Method Investments</h4>
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