Ryerson Holding (RYI) 10-Q 2017 Q3 Quarterly report

Exhibit 32.1

Written Statement of the Chief Executive Officer

In connection with the Quarterly Report of Ryerson Holding Corporation, (the “Company”) on Form 10-Q for the period ended September 30, 2017, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned officer of the Company certifies, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that, to such officer’s knowledge:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods expressed in the Report.

/s/ Edward J. Lehner

Edward J. Lehner

President & Chief Executive Officer

(Principal Executive Officer)

November 7, 2017