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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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                        <a class="menu-item " href="/sec-filings/annual-reports/xbrl_doc_only/1180">Cover</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1180">Document and Entity Information</a></li>
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                        <a class="menu-item " href="/sec-filings/annual-reports/xbrl_doc_only/1181">Financial Statements</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1181">Consolidated Balance Sheets</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1182">Consolidated Balance Sheets (Parenthetical)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1183">Consolidated Statements of Income (Loss)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1184">Consolidated Statements of Comprehensive Income (Loss)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1185">Consolidated Statement of Comprehensive Income (Loss) (Parenthetical)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1186">Consolidated Statements of Changes in Redeemable Non-controlling Interest and Stockholders' Equity</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1187">Consolidated Statements of Changes in Redeemable Non-controlling Interest and Stockholders' Equity (Parenthetical)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1188">Consolidated Statements of Cash Flows</a></li>
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                        <a class="menu-item " href="/sec-filings/annual-reports/xbrl_doc_only/1189">Notes to Financial Statements</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1189">Description of Business</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1190">Summary of Significant Accounting Policies</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1191">Business Acquisitions and Related Transactions</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1192">Goodwill and Intangible Assets</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1193">Property and Equipment</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1194">Project Assets</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1195">Long-Term Debt</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1196">Income Taxes</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1197">Investment Fund</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1198">Non-Controlling Interests and Equity</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1199">Stock Incentive Plan</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1200">Employee Benefits</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1201">Commitments and Contingencies</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1202">Geographic Information</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1203">Other Expenses, Net</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1204">Fair Value Measurement</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1205">Derivative Instruments and Hedging Activities</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1206">Business Segment Information</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1207">Quarterly Information (Unaudited)</a></li>
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                        <a class="menu-item " href="/sec-filings/annual-reports/xbrl_doc_only/1208">Accounting Policies</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1208">Summary of Significant Accounting Policies (Policies)</a></li>
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                        <a class="menu-item " href="/sec-filings/annual-reports/xbrl_doc_only/1209">Notes Tables</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1209">Summary of Significant Accounting Policies (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1210">Business Acquisitions and Related Transactions (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1211">Goodwill and Intangible Assets (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1212">Property and Equipment (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1213">Project Assets (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1214">Long-Term Debt (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1215">Income Taxes (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1216">Stock Incentive Plan (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1217">Commitments and Contingencies (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1218">Geographic Information (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1219">Other Expenses, Net (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1220">Fair Value Measurement (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1221">Derivative Instruments and Hedging Activities (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1222">Business Segment Information (Tables)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1223">Quarterly Information (Unaudited) (Tables)</a></li>
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                        <a class="menu-item current" href="/sec-filings/annual-reports/xbrl_doc_only/1224">Notes Details</a>
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                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1224">Summary of Significant Accounting Policies - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1225">Summary of Significant Accounting Policies - Accounts Receivable (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1226">Summary of Significant Accounting Policies - Property and Equipment (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1227">Summary of Significant Accounting Policies - Goodwill and Intangible Assets (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1228">Summary of Significant Accounting Policies - Sales Leaseback (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1229">Summary of Significant Accounting Policies - Derivative Financial Instruments (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1230">Summary of Significant Accounting Policies - Earnings Per Share (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1231">Business Acquisitions and Related Transactions - Narrative (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1232">Business Acquisitions and Related Transactions - Purchase Price Allocation (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1233">Goodwill and Intangible Assets - Goodwill (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1234">Goodwill and Intangible Assets - Intangible Assets (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1235">Goodwill and Intangible Assets - Amortization (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1236">Goodwill and Intangible Assets - Future Amortization (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1237">Property and Equipment (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1238">Project Assets - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1239">Long-Term Debt - Schedule of Long-Term Debt (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1240">Long-Term Debt - Schedule of Maturities (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1241">Long-Term Debt - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1242">Income Taxes - Domestic and foreign income taxes (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1243">Income Taxes - Income tax provision (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1244">Income Taxes - Deferred income tax assets and liabilities (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1245">Income Taxes - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1246">Income Taxes - Reconciliation of effective tax rates (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1247">Income Taxes - Unrecognized tax benefits (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1248">Investment Fund (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1249">Non-Controlling Interests and Equity (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1250">Stock Incentive Plan - Narrative (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1251">Stock Incentive Plan - Stock Options Activity (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1252">Stock Incentive Plan - Fair Value Assumptions (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1253">Employee Benefits (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1254">Commitments and Contingencies - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1255">Commitments and Contingencies - Operating Leases (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1256">Geographic Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1257">Other Expenses, Net (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1258">Other Expenses, Net - Deferred Financing Costs (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1259">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/1260">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/1261">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/1262">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/1263">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/1264">Business Segment Information - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1265">Business Segment Information - Segment Information (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1266">Business Segment Information - Revenue (Details)</a></li>
                                                            <li><a href="/sec-filings/annual-reports/xbrl_doc_only/1267">Quarterly Information (Unaudited) (Details)</a></li>
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        <h4>Income Taxes - Reconciliation of effective tax rates (Details)</h4>
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