Company: ZEUS
Filing Date: 2025-10-30
Form Type: 425
Source: 0001437749-25-032438
Chunk: 11

Company: OLYMPIC STEEL INC
Filing Date: 2025-10-30
Form: 425
Chunk 11
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 THE PROPOSED TRANSACTIONS.

Investors and security holders will be able to obtain these materials (when they are available) and other documents filed with the SEC free of charge at the SEC’s website, www.sec.gov. Copies of documents filed with the SEC by Ryerson (when they become available) may be obtained free of charge on Ryerson’s website at www. ryerson.com or by directing a written request to Investor Relations, Ryerson Holding Corporation, 227 W. Monroe St., 27th Floor, Chicago, Illinois 60606. Copies of documents filed with the SEC by the Company (when they become available) may be obtained free of charge on the Company’s website at www.olysteel.com or by directing a written request to Olympic Steel, Inc., 22901 Millcreek Blvd., Suite 650, Highland Hills, Ohio 44122.

<div align='center'>Participants in Solicitation</div>

Each of the Company, Ryerson and their respective directors, executive officers and certain other members of management and employees may be deemed to be participants in the solicitation of proxies in respect of the proposed Transactions. Information regarding these persons who may, under the rules of the SEC, be considered participants in the solicitation of the Company Shareholders in connection with the proposed Transactions is set forth in the proxy statement/prospectus described above, which will be filed with the SEC. Additional information regarding the Company’s executive officers and directors is included in the Company’s definitive proxy statement, which was filed with the SEC on March 28, 2025. Additional information regarding Ryerson’s executive officers and directors is included in Ryerson’s definitive proxy statement, which was filed with the SEC on March 5, 2025. You can obtain free copies of these documents using the information in the paragraph immediately above.

Item 9.01 Financial Statements and Exhibits.

| (d) | Exhibits. |

| Exhibit 
 No.     
 2.1     |     | Description                                                                                                                                   
 Agreement and Plan of Merger, dated October 28, 2025, by and among the Olympic Steel, Inc., Ryerson Holding Corporation and Crimson MS Corp.* |
|:--------|:----|:----------------------------------------------------------------------------------------------------------------------------------------------|
| 104     |     | Cover Page Interactive Data File (embedded within the Inline XBRL document)                                                                   |

* Certain exhibits and schedules have been omitted and the Company agrees to furnish supplementally to the SEC a copy of any omitted exhibits upon request.

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