{"url_path":"/sec/gatx/8-k/2026-05-21/cover-page","section_key":"cover-page","section_title":"Cover Page","topic":"sec","document":{"doc_type":"8-K","doc_date":"2026-05-21","source_url":"https://www.sec.gov/Archives/edgar/data/40211/0001193125-26-234463-index.html","accession_number":"0001193125-26-234463","cik":"0000040211","ticker":"GATX","issuer_name":"GATX CORP","edgar_url":"https://www.sec.gov/Archives/edgar/data/40211/0001193125-26-234463-index.html","primary_entity_key":"0000040211","primary_entity_name":"GATX CORP"},"word_count":307,"has_tables":true,"body_markdown":"8-K\n\nCHX 0000040211 false 0000040211 2026-05-21 2026-05-21 0000040211 exch:XNYS 2026-05-21 2026-05-21 0000040211 exch:XCHI 2026-05-21 2026-05-21\n\n \n\n \n\nUNITED STATES\n\nSECURITIES AND EXCHANGE COMMISSION\n\nWashington, D.C. 20549\n\n \n\n \n\nFORM 8-K\n\n \n\n \n\nCURRENT REPORT\n\nPURSUANT TO SECTION 13 OR 15(d)\n\nOF THE SECURITIES EXCHANGE ACT OF 1934\n\nDate of report (Date of earliest event reported): May 21, 2026\n\n \n\n \n\nGATX Corporation\n\n(Exact name of registrant as specified in its charter)\n\n \n\n \n\n \n\nNew York\n \n1-2328\n \n36-1124040\n\n(State or other jurisdiction\n\nof incorporation)\n\n \n\n(Commission\n\nFile Number)\n\n \n\n(IRS Employer\n\nIdentification No.)\n\n233 South Wacker Drive\n\nChicago, Illinois 60606-7147\n\n(Address of principal executive offices, including zip code)\n\n(312) 621-6200\n\n(Registrant’s telephone number, including area code)\n\n \n\n \n\nCheck the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:\n\n \n\n☐\n\nWritten communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)\n\n \n\n☐\n\nSoliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)\n\n \n\n☐\n\nPre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))\n\n \n\n☐\n\nPre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))\n\nSecurities registered pursuant to Section 12(b) of the Act:\n\n \n\nTitle of each class\n\n \n\nTrading\n\nSymbol(s)\n\n \n\nName of Each Exchange\n\non Which Registered\n\nCommon Stock\n \nGATX\n \nNew York Stock Exchange\n\nCommon Stock\n \nGATX\n \nNYSE Texas, Inc\n\nIndicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).\n\nEmerging growth company ☐\n\nIf an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐"}