RYI Ryerson Holding Corporation

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of
the Securities Exchange Act of 1934 (Amendment No. )

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☐ Preliminary Proxy Statement

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☐ Definitive Proxy Statement

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☐ Soliciting Material Pursuant to §240.14a-12

Ryerson Holding Corporation

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RYERSON LOGO P.O. BOX 8016, CARY, NC 27512-9903 Your vote matters! Ryerson Holding Corporation Annual Meeting of Stockholders Thursday, April 17, 2025, 2:00 PM, Central Time Annual Meeting to be held live via the Internet - please visit www.proxydocs.com/RYI for more details You must register to attend the meeting online and/or participate at www.proxydocs.com/RYI For a convenient way to view proxy materials, VOTE, and obtain directions to attend the meeting go to www.proxydocs.com/RYI To vote your proxy while visiting this site, you will need the 12 digit control number in the box below. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. This is not a ballot. You cannot use this notice to vote your shares. We encourage you to access and review all of the important information contained in the proxy materials before voting. Under United States Securities and Exchange Commission rules, proxy materials do not have to be delivered in paper. Proxy materials can be distributed by making them available on the internet. If you want to receive a paper or e-mail copy of the proxy materials, you must request one. Unless requested, you will not otherwise receive a paper or e-mail copy. There is no charge to you for requesting a copy. In order to receive a paper package in time for this year's meeting, you must make this request on or before April 7, 2025. SEE REVERSE FOR FULL AGENDA Meeting Materials: Notice of Meeting and Proxy Statement & Annual Report on Form 10-K Important Notice Regarding the Availability of Proxy Materials for the Stockholders Meeting To Be Held On April 17, 2025 For Stockholders as of February 28, 2025 To order paper materials for this and /or future meetings of stockholders, use one of the following methods. Internet: www.investorelections.com/RYI Call: 1-866-648-8133 Email: paper@investorelections.com* If requesting material by e-mail, please send a blank e-mail with the 12 digit control number (located below) in the subject line. No other requests, instructions OR other inquiries should be included with your e-mail requesting material. Your control number Have the 12 digit control number located in the box above available when you access the website and follow the instructions. Copyright © 2025 BetaNXT, Inc. or its affiliates. All Rights Reserved

RYERSON LOGO Ryerson Holding Corporation Annual Meeting of Stockholders THE BOARD OF DIRECTORS RECOMMENDS A VOTE: FOR ON PROPOSALS 1, 2 AND 3 PROPOSAL 1. Election of Directors. 1.01 Bruce T. Crawford 1.02 Stephen P. Larson 2. The ratification of the appointment of KPMG LLP as our independent registered public accounting firm for 2025. 3. The adoption, on a non-binding, advisory basis, of a resolution approving the compensation of our named executive officers. 4. Such other business as may properly come before the Annual Meeting or any adjournment thereof.

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