Form10-Q (MarkOne)☒QUARTERLY REPORT PURSUANT TO SECTION13 OR 15(d) OF THESECURITIES EXCHANGE ACT OF1934For the quarterly period ended June 30, 2026OR☐TRANSITION REPORT PURSUANT TO SECTION13 OR 15(d) OF THESECURITIES EXCHANGE ACT OF1934For the transition period fromto Commission file number: 1-13011 Delaware(State or other jurisdiction ofIncorporation or Organization)76-0526487(I.R.S. EmployerIdentification No.)9753 Katy FreewaySuite700Houston, Texas 77024(Address of Principal Executive Offices) (Zip Code) Registrant’s telephone number, including area code:(713)830-9600 Securities registered pursuant to Section 12(b) of the Act: Indicate by check mark whether the registrant (1)has filed all reports required to be filed bySection13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12months (or for suchshorter period that the registrant was required to file such reports), and (2)has been subject to such filingrequirements for the past 90days.Yes⌧No◻ Indicate by check mark whether the registrant has submitted electronically every Interactive DataFile required to be submitted pursuant to Rule405 of RegulationS-T (Section232.405 of this chapter)during the preceding 12months (or for such shorter period that the registrant was required to submit suchfiles).Yes⌧No◻ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, anon-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of“large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growthcompany” in Rule 12b-2 of the Exchange Act. Largeacceleratedfiler⌧Acceleratedfiler◻Non-acceleratedfiler◻Smaller reportingcompany☐Emerging growthcompany☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use theextended transition period for complying with any new or revised financial accounting standards providedpursuant to Section 13(a) of the Exchange Act.◻ Indicate by check mark whether the registrant is a shell company (as defined in Exchange ActRule12b-2).Yes☐No⌧ The number of shares outstanding of the issuer’s common stock as of July 17, 2026 was35,194,329 (excluding treasury shares of 5,929,036). COMFORT SYSTEMS USA, INC.INDEX TO FORM 10-QFOR THE QUARTER ENDED JUNE 30, 2026 PagePartI—Financial Information2Item1—Financial Statements2Consolidated Balance Sheets2Consolidated Statements of Operations3Consolidated Statements of Stockholders’ Equity4Consolidated Statements of Cash Flows5Condensed Notes to Consolidated Financial Statements6Item2—Management’s Discussion and Analysis of Financial Condition and Results ofOperations21Item3—Quantitative and Qualitative Disclosures about Market Risk33Item4—Controls and Procedures33PartII—Other Information34Item1—Legal Proceedings34Item1A—Risk Factors34Item2—Unregistered Sales of Equity Securities and Use of Proceeds34Item 5—Other Information35Item6—Exhibits36Signatures37 CONSOLIDATED BALANCE SHEETS The accompanying notes are an integral part of these consolidated financial statements. COMFORT SYSTEMS USA,INC. CONSOLIDATED STATEMENTS OF OPERATIONS (In Thousands, Except Per Share Data) (Unaudited) COMFORT SYSTEMS USA,INC. CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (In Thousands, Except Share Amounts) (Unaudited) The accompanying notes are an integral part of these consolidated financial statements. COMFORT SYSTEMS USA,INC. CONSOLIDATED STATEMENTS OF CASH FLOWS (In Thousands)(Unaudited)Six Months EndedJune 30,20262025CASH FLOWS FROM OPERATING ACTIVITIES:Net income$ 811,980$ 400,137Adjustments to reconcile net income to net cash provided by operating activities—Amortization of identifiable intangible assets43,66839,906Depreciation expense38,60228,866Change in right-of-use assets23,71914,968Bad debt expense4,3283,688Deferred tax provision3,2191,097Amortization of debt financing costs464340Gain on sale of assets(1,087)(998)Changes in the fair value of contingent earn-out obligations12,4157,831Stock-based compensation28,61212,193Changes in operating assets and liabilities, net of effects of acquisitions anddivestitures—(Increase) decrease in—Receivables, net(633,131)(239,680)Inventories(20,738)(11,420)Prepaid expenses and other current assets(3)3,817Costs and estimated earnings in excess of billings and unbilled accounts receivable(49,629)(163,567)Other noncurrent assets(3,129)135Increase (decrease) in—Accounts payable and other current liabilities215,497(320,130)Billings in excess of costs and estimated earnings and deferred revenue1,061,506376,780Other long-term liabilities(8,039)10,582Net cash provided by operating activities1,528,254164,545CASH FLOWS FROM INVESTING ACTIVITIES:Purchases of property and equipment(288,837)(53,481)Proceeds from sales of property and equipment2,1322,064Cash paid for acquisitions, net of cash acquired(162,845)(124,093)Payments for investments(66,123)(7,478)Proceeds from investments48,209—Net cash use