| Schedule of Disaggregation of Revenue |
The following tables present the Company’s third-party revenue disaggregated by source of revenue and geography in total and for the Environmental Services and SKSS operating segments and Corporate (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended March 31, 2026 | | | Environmental Services | | Safety-Kleen Sustainability Solutions | | Corporate | | Total | | Primary Geographical Markets | | | | | | | | | | United States | | $ | 1,151,108 | | | $ | 200,273 | | | $ | — | | | $ | 1,351,381 | | | Canada | | 91,340 | | | 16,816 | | | — | | | 108,156 | | | Total third-party revenues | | $ | 1,242,448 | | | $ | 217,089 | | | $ | — | | | $ | 1,459,537 | | | | | | | | | | | | Sources of Revenue | | | | | | | | | | Technical Services | | $ | 448,313 | | | $ | — | | | $ | — | | | $ | 448,313 | | Industrial Services and Other | | 302,561 | | | — | | | — | | | 302,561 | | | Field and Emergency Response Services | | 231,358 | | | — | | | — | | | 231,358 | | | Safety-Kleen Environmental Services | | 260,216 | | | 77,973 | | | — | | | 338,189 | | | Safety-Kleen Oil | | — | | | 139,116 | | | — | | | 139,116 | | | Total third-party revenues | | $ | 1,242,448 | | | $ | 217,089 | | | $ | — | | | $ | 1,459,537 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended March 31, 2025 | | | Environmental Services | | Safety-Kleen Sustainability Solutions | | Corporate | | Total | | Primary Geographical Markets | | | | | | | | | | United States | | $ | 1,116,267 | | | $ | 200,019 | | | $ | 97 | | | $ | 1,316,383 | | | Canada | | 90,771 | | | 24,796 | | | — | | | 115,567 | | | Total third-party revenues | | $ | 1,207,038 | | | $ | 224,815 | | | $ | 97 | | | $ | 1,431,950 | | | | | | | | | | | | Sources of Revenue | | | | | | | | | | Technical Services | | $ | 426,205 | | | $ | — | | | $ | — | | | $ | 426,205 | | Industrial Services and Other | | 322,358 | | | — | | | 97 | | | 322,455 | | | Field and Emergency Response Services | | 215,702 | | | — | | | — | | | 215,702 | | | Safety-Kleen Environmental Services | | 242,773 | | | 64,901 | | | — | | | 307,674 | | | Safety-Kleen Oil | | — | | | 159,914 | | | — | | | 159,914 | | | Total third-party revenues | | $ | 1,207,038 | | | $ | 224,815 | | | $ | 97 | | | $ | 1,431,950 | |
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| Schedule of Contract Balances |
| | | | | | | | | | | | | | | | (in thousands) | | March 31, 2026 | | December 31, 2025 | | Receivables | | $ | 1,113,163 | | | $ | 1,044,137 | | | Contract assets (unbilled receivables) | | 192,241 | | | 160,888 | | | Contract liabilities (deferred revenue) | | 82,858 | | | 81,529 | |
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