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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , DC 20549 FORM 10 - K ( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from Delaware ( State or other jurisdiction of incorporation or organization ) Commission file number 000-22117 SILGAN HOLDINGS INC . ( Exact name of Registrant as specified in its charter ) 4 Landmark Square Stamford , Connecticut ( Address of principal executive offices ) or to Title of each class Common Stock , par value $ 0.01 per share Registrant's telephone number , including area code ( 203 ) 975-7110 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) . SLGN 06-1269834 ( I.R.S. Employer Identification No. ) 06901 ( Zip Code ) Name of each exchange on which registered Nasdaq Global Select Market 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 y No o Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15 ( d ) of the Act . Yes o No ý 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 ý No o 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 during the preceding 12 months ( or for such shorter period that the Registrant was required to submit such files ) . Yes ý No o 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 . Large accelerated filer Non - accelerated filer Accelerated filer Smaller reporting company Emerging growth company 0 0 0 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 . o 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 . Yes □ No ý Indicate by check mark whether the Registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . The aggregate market value of the Registrant's Common Stock held by non - affiliates , computed by reference to the price at which the Registrant's Common Stock was last sold as of June 30 , 2020 , the last business day of the Registrant's most recently completed second fiscal quarter , was approximately $ 2.54 billion . Common Stock of the Registrant held by executive officers and directors of the Registrant has been excluded from this computation in that such persons may be deemed to be affiliates . This determination of affiliate status is not a conclusive determination for other purposes . As of February 1 , 2021 , the number of shares outstanding of the Registrant's Common Stock , par value $ 0.01 per share , was 110,057,027 . Documents Incorporated by Reference : Portions of the Registrant's Proxy Statement , to be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year covered by this Annual Report on Form 10 - K , for its Annual Meeting of Stockholders to be held in 2021 are incorporated by reference in Part III of this Annual Report on Form 10 - K .