(Mark One)☑QUARTERLY REPORT PURSUANT TO SECTION13OR 15(d) OF THE SECURITIES EXCHANGE ACTOF 1934FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2026OR TRANSITION REPORT PURSUANT TOSECTION13 OR 15(d) OF THESECURITIES EXCHANGE ACTOF 1934 For the transition period from_________ to _________ .Commission File Number 1-6903 (Exact name of registrant as specified in its charter) Delaware75-0225040(State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)14221 N. Dallas Parkway, Suite 1100Dallas, Texas75254-2957(Address of principal executive offices)(Zip Code)(214) 631-4420(Registrant's telephone number, including area code)Securities registered pursuant to Section 12(b) of the Act:Title of each classTrading Symbol(s)Name of each exchangeon which registeredCommon StockTRNNew York Stock ExchangeNYSE Texas Indicate by check mark whether the Registrant (1)has filed all reports requiredto be filed by Section13 or 15(d) of theSecurities Exchange Act of 1934 duringthe preceding 12months (or for such shorter period that the Registrant wasrequired tofile such reports), and (2)has been subject to such filingrequirements for the past 90days.YesNo Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to besubmitted pursuant to Rule405 of RegulationS-T(§232.405 of this chapter) during the preceding 12months (or for suchshorter period that the registrant was required to submit suchfiles).YesNo Indicate by check mark whether the registrant is a large accelerated filer, anaccelerated filer, a non-accelerated filer, a smallerreporting company, or an emerging growth company. See thedefinitions of “large accelerated filer,” “accelerated filer,” “smallerreportingcompany,” and "emerging growth company" in Rule12b-2 of the Exchange Act. Large accelerated filerAccelerated filerNon-accelerated filerSmaller reporting company☐Emerging growth company☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition periodfor complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. Indicate by check mark whether the Registrant is a shellcompany (as defined in Rule 12b-2 of the Exchange Act).Yes☐No At April 23, 2026, the number of shares of common stock, $0.01 par value, outstanding was 79,505,503. TRINITY INDUSTRIES, INC.FORM 10-QTABLE OF CONTENTS CaptionPagePART I FINANCIAL INFORMATIONItem 1. Financial Statements3Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations23Item 3. Quantitative and Qualitative Disclosures About Market Risk37Item 4. Controls and Procedures37 Table of Contents Trinity Industries, Inc. and SubsidiariesConsolidated Statements of Comprehensive Income (Loss)(unaudited) Table of Contents See accompanying notes to Consolidated Financial Statements. Trinity Industries, Inc. and SubsidiariesNotes to Consolidated Financial Statements(Unaudited) Note 1. Summary of Significant Accounting Policies Basis of Presentation The foregoing Consolidated Financial Statements are unaudited and have been prepared from the books and records ofTrinity Industries, Inc. and Subsidiaries (“Trinity,” “Company,” “we,” “our,” or "us"), which include the accounts of our wholly-owned subsidiaries and partially-owned subsidiaries, TRIP Rail Holdings LLC (“TRIP Holdings”) and Trinity Global VenturesLimited ("Trinity Global Ventures"), in which we have a controlling interest as of and for the three months ended March 31,2026. In our opinion, all normal and recurring adjustments necessary for a fair presentation of our financial position as ofMarch 31, 2026 and the results of operations and cash flows for the three months ended March 31, 2026 and 2025 havebeenmade in conformity with generally accepted accounting principles. All significant intercompany accounts andtransactions have been eliminated. Certain prior year balances have been reclassified to conform to the 2026 presentation. Due to seasonal and other factors, the results of operations for the three months ended March 31, 2026 may not beindicative of expected results of operations for the year ending December 31, 2026. These interim financial statements andnotes are condensed as permitted by the instructions to Form 10-Q and should be read in conjunction with our auditedConsolidated Financial Statements included in our Form 10-K for the year ended December 31, 2025. There have been nochanges to our significant accounting policies disclosed in our Annual Report on Form 10-K for the year ended December31, 2025 that had a material impact on our Consolidated Financial Statements or related notes as of and for the threemonths ended March 31, 2026. Financial Instruments We consider all highly liquid debt instruments to be either cash and cash equivalents if purchased with a maturity of threemonths or less, or short-term