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REVENUE FROM CONTRACTS WITH CUSTOMERS | 9 Months Ended
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Sep. 30, 2025
Revenue from Contract with Customer [Abstract] |
REVENUE FROM CONTRACTS WITH CUSTOMERS | REVENUE FROM CONTRACTS WITH CUSTOMERS Disaggregation of Revenue Our reportable segments for the three and nine months ended September 30, 2025 are North America Regions, U.S. Federal, Europe, Renewable Fuels, and All Other. The following table presents our revenue disaggregated by line of business and reportable segment for the three months ended September 30, 2025:
| North America Regions |  | U.S. Federal |  | Renewable Fuels |  | Europe |  | All Other |  | Total
Project revenue | $ | 198,448 |  |  | $ | 65,828 |  |  | $ | 5,078 |  |  | $ | 140,598 |  |  | $ | — |  |  | $ | 409,952 |
O&M revenue | 12,397 |  |  | 15,583 |  |  | 1,959 |  |  | 831 |  |  | — |  |  | 30,770 |
Energy assets | 23,647 |  |  | 7,763 |  |  | 30,633 |  |  | 494 |  |  | — |  |  | 62,537 |
Other | 3,108 |  |  | 334 |  |  | 4 |  |  | 2,311 |  |  | 16,971 |  |  | 22,728 |
Total revenues | $ | 237,600 |  |  | $ | 89,508 |  |  | $ | 37,674 |  |  | $ | 144,234 |  |  | $ | 16,971 |  |  | $ | 525,987 |
The following table presents our revenue disaggregated by line of business and reportable segment for the three months ended September 30, 2024:
| North America Regions |  | U.S. Federal |  | Renewable Fuels |  | Europe |  | All Other |  | Total
Project revenue | $ | 258,977 |  |  | $ | 66,162 |  |  | $ | 10,295 |  |  | $ | 49,943 |  |  | $ | — |  |  | $ | 385,377 |
O&M revenue | 10,284 |  |  | 15,817 |  |  | 1,844 |  |  | 480 |  |  | — |  |  | 28,425 |
Energy assets | 20,444 |  |  | 7,096 |  |  | 31,393 |  |  | 197 |  |  | — |  |  | 59,130 |
Other | 1,906 |  |  | 38 |  |  | 5 |  |  | 1,993 |  |  | 23,999 |  |  | 27,941 |
Total revenues | $ | 291,611 |  |  | $ | 89,113 |  |  | $ | 43,537 |  |  | $ | 52,613 |  |  | $ | 23,999 |  |  | $ | 500,873 |
The following table presents our revenue disaggregated by line of business and reportable segment for the nine months ended September 30, 2025:
| North America Regions |  | U.S. Federal |  | Renewable Fuels |  | Europe |  | All Other |  | Total
Project revenue | $ | 521,688 |  |  | $ | 109,325 |  |  | $ | 17,124 |  |  | $ | 371,364 |  |  | $ | — |  |  | $ | 1,019,501 |
O&M revenue | 31,327 |  |  | 44,376 |  |  | 5,736 |  |  | 2,132 |  |  | — |  |  | 83,571 |
Energy assets | 65,286 |  |  | 19,900 |  |  | 95,801 |  |  | 1,152 |  |  | — |  |  | 182,139 |
Other | 8,744 |  |  | 798 |  |  | 7 |  |  | 8,127 |  |  | 48,213 |  |  | 65,889 |
Total revenues | $ | 627,045 |  |  | $ | 174,399 |  |  | $ | 118,668 |  |  | $ | 382,775 |  |  | $ | 48,213 |  |  | $ | 1,351,100 |
The following table presents our revenue disaggregated by line of business and reportable segment for the nine months ended September 30, 2024:
| North America Regions |  | U.S. Federal |  | Renewable Fuels |  | Europe |  | All Other |  | Total
Project revenue | $ | 553,930 |  |  | $ | 177,721 |  |  | $ | 27,342 |  |  | $ | 161,431 |  |  | $ | — |  |  | $ | 920,424 |
O&M revenue | 25,728 |  |  | 45,723 |  |  | 6,357 |  |  | 2,122 |  |  | — |  |  | 79,930 |
Energy assets | 53,944 |  |  | 12,749 |  |  | 88,421 |  |  | 557 |  |  | 29 |  |  | 155,700 |
Other | 4,425 |  |  | 547 |  |  | 128 |  |  | 5,684 |  |  | 70,423 |  |  | 81,207 |
Total revenues | $ | 638,027 |  |  | $ | 236,740 |  |  | $ | 122,248 |  |  | $ | 169,794 |  |  | $ | 70,452 |  |  | $ | 1,237,261 |
The following table presents information related to our revenue recognized over time:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Percentage of revenue recognized over time | 96% |  | 97% |  | 96% |  | 96%
The remainder of our revenue is for products and services transferred at a point in time, at which point revenue is recognized. We attribute revenues to customers based on the location of the customer. The following table presents information related to our revenues by geographic area:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
United States | $ | 352,725 |  |  | $ | 431,918 |  |  | $ | 887,261 |  |  | $ | 1,020,517 |
Canada | 29,023 |  |  | 16,337 |  |  | 80,991 |  |  | 46,933 |
Europe | 144,239 |  |  | 52,618 |  |  | 382,848 |  |  | 169,811 |
Total revenues | $ | 525,987 |  |  | $ | 500,873 |  |  | $ | 1,351,100 |  |  | $ | 1,237,261 |
Contract Balances The following tables provide information about receivables, contract assets and contract liabilities from contracts with customers:
|  | September 30, 2025 |  | December 31, 2024
Accounts receivable, net |  | $ | 253,793 |  |  | $ | 256,961 |
Accounts receivable retainage, net |  | 48,846 |  |  | 39,843 |
Contract Assets: |  |  |  |
Unbilled revenue |  | $ | 691,316 |  |  | $ | 644,105 |
Contract Liabilities: |  |  |  |
Deferred revenue |  | $ | 87,297 |  |  | $ | 91,734 |
Deferred revenue, non-current (1) |  | 36,369 |  |  | 29,885 |
Total contract liabilities |  | $ | 123,666 |  |  | $ | 121,619 |
| September 30, 2024 |  | December 31, 2023
Accounts receivable, net | $ | 230,298 |  |  | $ | 153,362 |
Accounts receivable retainage, net | 43,466 |  |  | 33,826 |
Contract Assets: |  |  |
Unbilled revenue | $ | 572,804 |  |  | $ | 636,163 |
Contract Liabilities: |  |  |
Deferred revenue | $ | 108,020 |  |  | $ | 52,903 |
Deferred revenue, non-current (1) | 20,808 |  |  | 18,393 |
Total contract liabilities | $ | 128,828 |  |  | $ | 71,296 |
(1) Performance obligations that are expected to be completed beyond the next twelve months and are included in other liabilities in the condensed consolidated balance sheets.
The increase in contract assets for the nine months ended September 30, 2025 was primarily due to revenue recognized of $906,072, as well as reclassifications, primarily from contract liabilities as a result of the timing of customer payments, offset by billings of $886,843. The increase in contract liabilities was primarily driven by the receipt of advance payments from customers, and related billings, as well as reclassifications from contract assets as a result of timing of customer payments. The advance payments and reclassifications exceeded the recognition of revenue as performance obligations were satisfied. For the nine months ended September 30, 2025, we recognized revenue of $350,986 and billed $328,495 to customers that had balances which were included in contract liabilities at December 31, 2024. The decrease in contract assets for the nine months ended September 30, 2024 was primarily due to revenue recognized of $807,913 offset by billings of $921,597. Contract assets also increased due to reclassifications, primarily from contract liabilities as a result of timing of customer payments. The increase in contract liabilities was primarily driven by the receipt of advance payments from customers, and related billings, as well as reclassifications from contract assets as a result of timing of customer payments. The advance payments and reclassifications exceeded the recognition of revenue as performance obligations were satisfied. For the nine months ended September 30, 2024, we recognized revenue of $284,842 and billed $271,173 to customers that had balances which were included in contract liabilities at December 31, 2023. Performance Obligations Our remaining performance obligations (“backlog”) represent the unrecognized revenue value of our contract commitments. At September 30, 2025, we had contracted backlog of $3,949,124 of which approximately 34% is anticipated to be recognized as revenue in the next twelve months. The remaining performance obligations primarily relate to the energy efficiency and renewable energy construction projects, including long-term operations and maintenance (“O&M”) services related to these projects. The long-term services have varying initial contract terms, up to 27 years. Deferred Project Costs Deferred project costs include costs incurred on active projects which will be reclassified either to contract assets or energy assets, as applicable, once a change order or other project resolution is finalized. Project Development Costs Project development cos ts of $5,733 and $4,546 were recognized in our condensed consolidated statements of income on projects that converted to customer contracts during the three months ended September 30, 2025 and 2024, respectively. Project development costs of $14,214 and $10,830 were recognized in the condensed consolidated statements of income on projects that converted to customer contracts during the nine months ended September 30, 2025 and 2024, respectively. No impairment charges in connection with our project development costs were recorded during the three or nine months ended September 30, 2025 and 2024.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-9 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-15 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Topic 606 -Publisher FASB -URI https://asc.fasb.org/606/tableOfContent + Details
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