CB: Other company developments

Item 8.01. Other Events. On May 18, 2026, Chubb INA Holdings LLC (the “Company”) agreed to sell in a public offering $1,000,000,000 of 5.300% Senior Notes due 2036 (the “Notes”). The Notes will be fully and unconditionally guaranteed by Chubb Limited. Attached as Exhibits 1.1 and 1.2 are copies of the underwriting agreement and terms agreement relating to such public offering. Attached as Exhibits 4.1 and 4.2 are the form of officer’s certificate establishing the Notes and the form of the Notes. Attached as Exhibits 5.1 and 5.2 are certain opinions related to the Notes. Item 9.01. Financial Statements and Exhibits. (d) Exhibits. EXHIBIT INDEX Number Description Method of Filing 1.1* Underwriting Agreement, dated as of May 18, 2026, between Chubb INA Holdings LLC, Chubb Limited and the underwriters named in the related terms agreement Filed herewith 1.2* Terms Agreement, dated as of May 18, 2026, among Chubb INA Holdings LLC, Chubb Limited, Barclays Capital Inc. and Wells Fargo Securities, LLC, as representatives of the underwriters named therein Filed herewith 4.1* Form of Officer’s Certificate related to the 5.300% Senior Notes due 2036 Filed herewith 4.2 Form of Global Note for the 5.300% Senior Notes due 2036 Filed herewith 5.1 Opinion of Bär & Karrer AG Filed herewith 5.2 Opinion of Willkie Farr & Gallagher LLP Filed herewith 23.1 Consent of Bär & Karrer AG Included in Exhibit 5.1 23.2 Consent of Willkie Farr & Gallagher LLP Included in Exhibit 5.2 104 Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document) * Certain exhibits omitted pursuant to Item 601(a)(5) of Regulation S-K. Chubb Limited agrees to furnish supplementally a copy of any omitted exhibit to the Securities & Exchange Commission upon request; provided,