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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 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 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 No. 001-34735 RYERSON HOLDING CORPORATION ( Exact name of registrant as specified in its charter ) DELAWARE ( State or other jurisdiction of incorporation or organization ) 227 W. Monroe St. , 27th Floor Chicago , Illinois 60606 ( Address of principal executive offices ) ( 312 ) 292-5000 ( Registrant's telephone number , including area code ) 26-1251524 ( I.R.S. Employer Identification No. ) Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Common Stock , $ 0.01 par value , 100,000,000 shares authorized 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 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 Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or 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 Trading symbol ( s ) Name of each exchange on which registered New York Stock Exchange RYI No 风 No > 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 . Yes No Indicate by check mark whether the registrant has filed a report on and attestation to its management 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 Exchange Act ) . Yes No 0 0 The aggregate market value of the voting and non - voting common equity held by non - affiliates of the registrant , based on the closing price of a share of the registrant's common stock on June 30 , 2020 as reported by the New York Stock Exchange on such date was approximately $ 78,979,779 . Shares of the registrant's common stock held by each executive officer , director , and holder of 5 % or more of the outstanding common stock have been excluded in that such persons may be deemed to be affiliates . This calculation does not reflect a determination that certain persons are affiliates of the registrant for any other purpose . As of February 19 , 2021 there were 38,117,397 shares of our Common Stock , par value $ 0.01 per share , outstanding . DOCUMENTS INCORPORATED BY REFERENCE The information required to be furnished suant to Part III of this Form 10 - K will be set forth in , and incorporated by reference from , the registrant's definitive proxy statement for the annual meeting of stockholders ( the " 2020 Proxy Statement " ) , which will be filed with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year ended December 31 , 2020 .