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Table of Contents ( Mark One ) No UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31 , 2020 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number : 1-10879 Amphenol AMPHENOL CORPORATION ( Exact name of Registrant as specified in its charter ) Delaware ( State of Incorporation ) 358 Hall Avenue , Wallingford , Connecticut 06492 ( Address of principal executive offices ) 203-265-8900 Securities registered pursuant to Section 12 ( b ) of the Act : 22-2785165 ( I.R.S. Employer Identification No. ) ( Registrant's telephone number , including area code ) Trading Symbol ( s ) Name of each exchange on which registered New York Stock Exchange Title of each class APH Class A Common Stock , $ 0.001 par value Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes No Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes No Large Accelerated Filer = Non - accelerated Filer Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or an emerging growth company . See the definitions of " large accelerated filer " , " accelerated filer " , “ smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Accelerated Filer Smaller Reporting Company 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 . Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . < Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes No As of June 30 , 2020 , the aggregate market value of Amphenol Corporation Class A Common Stock ( based upon the closing price of such stock on the New York Stock Exchange ) held by non - affiliates was approximately $ 25,254 million . As of January 31 , 2021 , the total number of shares outstanding of Registrant's Class A Common Stock was 299,576,711 . DOCUMENTS INCORPORATED BY REFERENCE Portions of the Registrant's definitive proxy statement , which is expected to be filed within 120 days following the end of the fiscal year covered by this report , are incorporated by reference into Part III hereof .