Issuer: Amphenol Technologies Holding GmbH (wholly owned indirect subsidiary of Amphenol Corporation); Guarantor: Amphenol Corporation. Size and terms: €500,000,000 aggregate principal amount of 3.625% Senior Notes due March 30, 2031; interest payable annually on March 30, beginning March 30, 2027. Issue price: 99.838% of principal; net proceeds approximately €496.1 million after underwriting discounts and estimated expenses. Use of proceeds: repay Amphenol Technologies’ outstanding 0.750% Euro Senior Notes due 2026 at maturity and for general corporate purposes. Call features: make-whole call at any time prior to December 30, 2030; par call at 100% on or after December 30, 2030, in each case plus accrued interest. Ranking: senior unsecured and unsubordinated obligations of the issuer; guaranteed on a senior unsecured basis by Amphenol Corporation; structurally subordinated to indebtedness of subsidiaries and effectively subordinated to secured debt to the extent of collateral value. Change of control: holders may require repurchase at 101% plus accrued interest upon a Change of Control Repurchase Event. Listing: approved for admission to the Official List of Euronext Dublin and trading on its Global Exchange Market. Documentation: Indenture dated March 30, 2026, with customary covenants (limitations on liens and sale/leaseback) and events of default (including cross-acceleration above $50,000,000). Underwriters: Barclays Bank PLC, Citigroup Global Markets Europe AG, Commerzbank Aktiengesellschaft, HSBC Bank plc, BofA Securities Europe SA, Goldman Sachs & Co. LLC, TD Global Finance unlimited company, U.S. Bancorp Investments, Inc., Loop Capital Markets LLC and Siebert Williams Shank & Co., LLC.