Amphenol Corporation

Item 1.01 Entry into a Material Definitive Agreement. On May 5, 2026, Amphenol Corporation (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) by and among the Company and Barclays Bank PLC, Citigroup Global Markets Limited, Commerzbank Aktiengesellschaft, HSBC Bank plc, BNP PARIBAS, J.P. Morgan Securities plc, Mizuho International plc, Standard Chartered Bank, ING Bank N.V., Belgian Branch and Siebert Williams Shank & Co., LLC, relating to the offer and sale of €600 million aggregate principal amount of the Company’s 3.375% Senior Notes due 2029 (the “2029 Notes”) and €500 million aggregate principal amount of the Company’s 3.875% Senior Notes due 2034 (the “the 2034 Notes” and, together with the 2029 Notes, the “Notes”). The closing of the Notes offering (the “Notes Offering”) is expected to occur on May 12, 2026, subject to the satisfaction of customary closing conditions. A copy of the Underwriting Agreement is attached hereto as Exhibit 1.1 and is filed herewith for purposes of incorporation by reference into the Company’s Registration Statement (No. 333-293923). The above description of the Underwriting Agreement is qualified in its entirety by reference to the Underwriting Agreement, a copy of which is attached as Exhibit 1.1 to this Current Report on Form 8-K and is incorporated by reference herein.

Item 8.01 Other Events. On May 5, 2026, the Company issued a press release announcing the pricing of the Notes Offering, which is attached hereto as Exhibit 99.1 and is incorporated by reference herein.