Shareholder Vote

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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): March 12, 2026 CABOT CORPORATION (Exact Name of Registrant as Specified in Its Charter) DELAWARE (State or Other Jurisdiction of Incorporation)       1-5667 04-2271897 (Commission File Number) (IRS Employer Identification No.)       TWO SEAPORT LANE , SUITE 1400 , BOSTON , MASSACHUSETTS 02210-2019 (Address of Principal Executive Offices) (Zip Code) (617) 345-0100 (Registrant’s Telephone Number, Including Area Code) (Former Name or Former Address, if Changed Since Last Report) 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 communications 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 communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))     Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934:           Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock, $1 par value per share CBT The New York Stock Exchange Indicate 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). 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. ☐         Item 5.07 Submission of Matters to a Vote of Security Holders On March 12, 2026, the Company held its annual meeting of stockholders pursuant to notice duly given. The Company’s stockholders voted on the following three proposals and cast their votes as set forth below. 1. All of the Board’s nominees for director were elected to the class of directors whose term expires in 2029 by the votes set forth in the table below:   For Against Abstain Broker Non-Votes Sean D. Keohane  44,953,132 568,330 13,664 1,897,152 Raffiq Nathoo       44,004,959 1,407,986 122,181 1,897,152 Thierry Vanlancker       43,025,805 2,473,978 35,343 1,897,152 In addition to the directors elected at the meeting to the class of directors whose term expires in 2029, the terms of office of the following directors continued after the meeting: Cynthia A. Arnold, Douglas G. Del Grosso, Christine Y. Yan, Michael M. Morrow, Michelle Williams, and Frank A. Wilson.   2. The Company’s stockholders approved, on an advisory basis, the compensation of the Company’s named executive officers by the votes set forth in the table below:   For: 44,750,029 Against: 615,613 Abstain: 169,484 Broker Non-Votes: 1,897,152   3. The Company’s stockholders ratified the appointment of Deloitte & Touche LLP as the Company’s independent registered public accounting firm for the fiscal year ending September 30, 2026 by the votes set forth in the table below:    For: 45,671,483 Against: 1,678,144 Abstain: 82,652   The proposal to ratify the appointment of Deloitte & Touche LLP was a routine matter and, therefore, there were no broker non-votes relating to that matter.           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/ Karen A. Kalita Name: Karen A. Kalita Title: Senior Vice President and General Counsel   Date: March 17, 2026