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<title>Ameresco, Inc. Quarterly report pursuant to Section 13 or 15(d)</title>
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    <h3>Quarterly report pursuant to Section 13 or 15(d)</h3>
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                        <a class="menu-item " href="/sec-filings/quarterly-reports/xbrl_doc_only/2127">Cover</a>
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                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2127">Document and Entity Information</a></li>
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                        <a class="menu-item " href="/sec-filings/quarterly-reports/xbrl_doc_only/2128">Financial Statements</a>
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                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2132">Condensed Consolidated Statements of Comprehensive Income (Parenthetical)</a></li>
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                        <a class="menu-item " href="/sec-filings/quarterly-reports/xbrl_doc_only/2135">Notes to Financial Statements</a>
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                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2135">Basis of Presentation</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2136">Summary of Significant Accounting Policies</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2137">Revenue from Contracts with Customers</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2138">Business Acquisitions and Related Transactions</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2139">Goodwill and Intangible Assets</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2140">Energy Assets Energy Assets</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2141">Income Taxes</a></li>
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                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2144">Fair Value Measurement</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2145">Derivative Instruments and Hedging Activities</a></li>
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                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2147">Non-controlling Interests and Equity</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2148">Earnings Per Share and Other Equity Related Information</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2149">Business Segment Information</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2150">Debt</a></li>
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                        <a class="menu-item current" href="/sec-filings/quarterly-reports/xbrl_doc_only/2151">Accounting Policies</a>
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                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2151">Summary of Significant Accounting Policies (Policies)</a></li>
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                        <a class="menu-item " href="/sec-filings/quarterly-reports/xbrl_doc_only/2152">Notes Tables</a>
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                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2152">Revenue from Contracts with Customers (Tables)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2153">Business Acquisitions and Related Transactions (Tables)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2154">Goodwill and Intangible Assets (Tables)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2155">Energy Assets (Tables)</a></li>
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                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2162">Business Segment Information (Tables)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2163">Debt (Tables)</a></li>
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                        <a class="menu-item " href="/sec-filings/quarterly-reports/xbrl_doc_only/2164">Notes Details</a>
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                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2164">Summary of Significant Accounting Policies - Restricted Cash (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2165">Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2166">Revenue from Contracts with Customers - Disaggregation of Revenue (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2167">Revenue from Contracts with Customers - Contract Balances (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2168">Revenue from Contracts with Customers - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2169">Business Acquisitions and Related Transactions - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2170">Business Acquisitions and Related Transactions - Consideration Paid and the Allocation of the Purchase Price (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2171">Goodwill and Intangible Assets - Goodwill (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2172">Goodwill and Intangible Assets - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2173">Energy Assets - Energy Assets (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2174">Energy Assets - Financing Lease Assets (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2175">Energy Assets  - Narrative (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2176">Income Taxes - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2177">Income Taxes - Unrecognized Tax Benefits (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2178">Leases - Narrative (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2179">Leases - Adoption of New Leasing Standard (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2180">Leases - Supplemental Balance Sheet Information Related to Leases (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2181">Leases - Lease Cost (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2182">Leases - Minimum Future Lease Obligations (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2183">Leases Leases - Schedule of Sale Leaseback Transactions (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2184">Commitments and Contingencies (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2185">Fair Value Measurement - Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2186">Fair Value Measurement - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2187">Fair Value Measurement - Changes in Contingent Liabilities (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2188">Fair Value Measurement - Fair Value and Carrying Value of Long-term Debt (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2189">Derivative Instruments and Hedging Activities - Fair Value of Derivative Instruments on the Balance Sheet (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2190">Derivative Instruments and Hedging Activities - Additional Information (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2191">Derivative Instruments and Hedging Activities - Effects on Statements of Income (Loss) and Consolidated Statements of Comprehensive Loss (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2192">Derivative Instruments and Hedging Activities - Effects of Derivative Instruments in Accumulated Other Comprehensive Loss (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2193">Derivative Instruments and Hedging Activities - Summary of Active Derivative Instruments (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2194">Investment Funds And Other Variable Interest Entities - Narrative (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2195">Investment Funds and Other Variable Interest Entities - Schedule of Variable Interest Entity Financial Information (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2196">Non-Controlling Interests and Equity (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2197">Earnings Per Share and Other Equity Related Information  - Schedule of Earnings Per Share, Basic and Diluted (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2198">Earnings Per Share and Other Equity Related Information  - Narrative (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2199">Business Segment Information (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2200">Debt  - Summary of Long-term Debt (Details)</a></li>
                                                            <li><a href="/sec-filings/quarterly-reports/xbrl_doc_only/2201">Debt - Additional Information (Details)</a></li>
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        <h4>Summary of Significant Accounting Policies (Policies)</h4>
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