Results of Operations

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 4, 2024 Cabot Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 1-5667 04-2271897 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)       2 Seaport Lane , Suite 1400 , Boston , MA 02210-2019 (Address of Principal Executive Offices) (Zip Code) Registrant’s Telephone Number, Including Area Code: (617) 345-0100 Check 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 ( see General Instruction A.2. below):   ☐ Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)         ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)         ☐ Pre-commencement communication pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))         ☐ Pre-commencement communication pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))   Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐ If 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. ☐   Securities registered pursuant to Section 12(b) of the Act:   Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock, $1 par value per share CBT New York Stock Exchange         Item 2.02 Results of Operations and Financial Condition.   On November 4, 2024, Cabot Corporation issued a press release announcing operating results for its fiscal quarter ended September 30, 2024. A copy of the press release is furnished herewith as Exhibit 99.1.     Item 9.01 Financial Statements and Exhibits.     Exhibit No.   Description       Exhibit 99.1**   Press release issued by Cabot Corporation on November 4, 2024       Exhibit 104*   Cover Page Interactive Data File (embedded within the Inline XBRL document) * Filed herewith. ** Furnished herewith.         SIGNATURES   Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.       CABOT CORPORATION     By: /s/ Lisa M. Dumont Name: Lisa M. Dumont Title: Vice President, Controller and Chief Accounting Officer   Date: November 4, 2024