Other Events. On August 6, 2026, Amphenol Corporation (the “Company”) announced that its Board of Directors approved the third quarter 2026 dividend on its Class A Common Stock (the “Common Stock”) in the amount of $0.25 per share. The dividend will be paid on October 14, 2026 to shareholders of record as of September 22, 2026. On August 6, 2026, the Company also announced the approval of a two-for-one stock split of the Common Stock in the form of a stock dividend to be distributed on Septem…

Other Events. On August 6, 2026, Amphenol Corporation (the “Company”) announced the approval of a two-for-one stock split of the Company’s Class A Common Stock in the form of a stock dividend to be distributed on September 2, 2026, to holders of record of the Company’s Class A Common stock at the close of business on August 17, 2026. A copy of the press release announcing the approval of the stock dividend is attached hereto as Exhibit 99.1 and is incorporated by reference herein. The informa…

Results of Operations and Financial Condition. ​ On July 29, 2026, Amphenol Corporation (the “Company”) issued a press release setting forth the Company’s financial results for the quarter and six months ended June 30, 2026. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. ​ ​ This Current Report on Form 8-K may include forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and the provisions…

Entry into a Material Definitive Agreement. On May 12, 2026, Amphenol Corporation (the “Company”) issued and sold €600,000,000 aggregate principal amount of the Company’s 3.375% Senior Notes due 2029 (the “2029 Notes”) and €500,000,000 aggregate principal amount of the Company’s 3.875% Senior Notes due 2034 (the “2034 Notes” and, together with the 2029 Notes, the “Notes”), pursuant to the Company’s Registration Statement on Form S-3 (No. 333-293923) (the “Registration Statement”), including t…

Creation of a Direct Financial Obligation or an Obligation Under an Off-Balance Sheet Arrangement of a Registrant. The foregoing terms and conditions of the Indenture, the Officers’ Certificate, the 2029 Notes and the 2034 Notes described in

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.

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 m…

Results of Operations and Financial Condition. ​ On April 29, 2026, Amphenol Corporation (the “Company”) issued a press release setting forth the Company’s financial results for the quarter ended March 31, 2026. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. ​ ​ This Current Report on Form 8-K may include forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and the provisions of Section 2…

Creation of a Direct Financial Obligation or an Obligation Under an Off-Balance Sheet Arrangement of a Registrant. The foregoing terms and conditions of the Amphenol Technologies Indenture, the Officers’ Certificate and the Notes described in

Entry into a Material Definitive Agreement. On March 30, 2026, Amphenol Technologies Holding GmbH (“Amphenol Technologies”), a German limited liability company ( Gesellschaft mit beschränkter Haftung ) and wholly-owned indirect subsidiary of Amphenol Corporation, issued and sold €500,000,000 aggregate principal amount of Amphenol Technologies’ 3.625% Senior Notes due 2031 (the “Notes”), pursuant to Amphenol Corporation’s and Amphenol Technologies’ Registration Statement on Form S-3 (No. 333-2…

Other Events. On March 24, 2026, the Company and Amphenol Technologies 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. 2

Entry into a Material Definitive Agreement. On March 24, 2026, Amphenol Technologies Holding GmbH (“Amphenol Technologies”), a German limited liability company ( Gesellschaft mit beschränkter Haftung ) and wholly-owned indirect subsidiary of Amphenol Corporation (the “Company”), entered into an underwriting agreement (the “Amphenol Technologies Underwriting Agreement”) by and among Amphenol Technologies, as issuer, the Company, as guarantor, and Barclays Bank PLC, Citigroup Global Markets Eur…

Chairman of the Board — Martin H. Loeffler: Mr. Loeffler intends to retire from the Board of Directors after a long tenure with the company.

Results of Operations and Financial Condition. ​ On January 28, 2026, Amphenol Corporation (the “Company”) issued a press release setting forth the Company’s financial results for the quarter and year ended December 31, 2025. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. ​ ​ This Current Report on Form 8-K may include forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and the provision…

Completion of Acquisition or Disposition of Assets. On January 9, 2026, Amphenol Corporation, a Delaware corporation (the “Company”), completed its acquisition of the Connectivity and Cable Solutions business of CommScope Holding Company, Inc., a Delaware corporation (“CommScope”), for approximately $10.5 billion in cash, subject to customary post-closing adjustments (the “Acquisition”), pursuant to the previously disclosed Purchase Agreement, dated as of August 3, 2025, by and between the Co…

Director — Sanjiv Lamba: The Board of Directors appointed Sanjiv Lamba as a new Director.

Entry into a Material Definitive Agreement. On November 10, 2025, Amphenol Corporation (the “Company”) issued and sold $500,000,000 aggregate principal amount of the Company’s Floating Rate Senior Notes due 2027 (the “Floating Rate Notes”), $750,000,000 aggregate principal amount of the Company’s 3.800% Senior Notes due 2027 (the “2027 Notes”), $750,000,000 aggregate principal amount of the Company’s 3.900% Senior Notes due 2028 (the “2028 Notes”), $1,000,000,000 aggregate principal amount of…

Creation of a Direct Financial Obligation or an Obligation Under an Off-Balance Sheet Arrangement of a Registrant. The foregoing terms and conditions of the Indenture, the Officers’ Certificate and the Floating Rate Notes, the 2027 Notes, the 2028 Notes, the 2030 Notes, the 2033 Notes, the 2036 Notes and the 2055 Notes described in

Entry into a Material Definitive Agreement. On October 27, 2025, Amphenol Corporation (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) by and between the Company and J.P. Morgan Securities LLC, BNP Paribas Securities Corp., Mizuho Securities USA LLC and BofA Securities, Inc., as representatives of the several Underwriters named in Schedule A thereto, relating to the offer and sale of $500,000,000 aggregate principal amount of floating rate senior notes due…

Results of Operations and Financial Condition. ​ On October 22, 2025, Amphenol Corporation (the “Company”) issued a press release setting forth the Company’s financial results for the quarter and nine months ended September 30, 2025. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. ​ ​ This Current Report on Form 8-K may include forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and the p…

Entry into a Material Definitive Agreement. On August 22, 2025, Amphenol Corporation (the “Company”) entered into (i) a three-year, $2 billion unsecured delayed draw term loan credit agreement among the Company, certain subsidiaries of the Company, a syndicate of financial institutions and JPMorgan Chase Bank, N.A., acting as the administrative agent (the “Three-Year Delayed Draw Term Loan”), which is scheduled to mature on the three year anniversary of the funding date, and (ii) a 364-day, $…

Creation of a Direct Financial Obligation or an Obligation Under an Off-Balance Sheet Arrangement of a Registrant. The information under

Results of Operations and Financial Condition. ​ On July 23, 2025, Amphenol Corporation (the “Company”) issued a press release setting forth the Company’s financial results for the quarter and six months ended June 30, 2025. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. ​ ​ This Current Report on Form 8-K may include forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and the provisions…

Entry into a Material Definitive Agreement. On June 16, 2025, Amphenol Corporation (the “Company”) issued and sold €600,000,000 aggregate principal amount of the Company’s 3.125% Senior Notes due 2032 (the “Notes”), pursuant to the Company’s Registration Statement on Form S-3 (No. 333-270605), including the related prospectus dated March 16, 2023, as supplemented by the prospectus supplement dated June 11, 2025. The Notes were sold in an underwritten public offering pursuant to an underwritin…

Creation of a Direct Financial Obligation or an Obligation Under an Off-Balance Sheet Arrangement of a Registrant. The foregoing terms and conditions of the Indenture, the Officers’ Certificate and the Notes described in