Company: ZEUS
Filing Date: 2025-10-28
Form Type: 425
Source: 0001193125-25-253626
Chunk: 18

Company: OLYMPIC STEEL INC
Filing Date: 2025-10-28
Form: 425
Chunk 18
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 business my father and uncle started more than 70 years ago. We went from private to public in 1994, and now we enthusiastically take this next step to accelerate Olympic Steel’s continued growth. Ryerson is a well-respected company with more than 180 years of history and a values-based culture much like our own. We fully endorse this next chapter for Olympic Steel and our stakeholders.”

Ryerson and Olympic Steel will discuss the announced merger agreement on Wednesday, October 29that 10 a.m. Eastern Time in a joint conversation. This conversation will take place on Ryerson’s third quarter 2025 earnings call following the Company’s prepared financial comments. The online broadcast will be available on Ryerson’s Investor Relations website, ir.ryerson.com.

<div align='center'>Ryerson Holding Corporation’s Third Quarter

2025 Earnings Call Details:</div>

DATE:Wednesday, October 29, 2025

TIME:10:00 a.m. ET / 9:00 a.m. CT

DIAL-IN:800-330-6710 (U.S. & Canada) / 646-769-9200 (International)

CONFERENCE ID:1257397

Advisors

J.P. Morgan is acting as Ryerson’s exclusive financial advisor, and Willkie Farr & Gallagher LLP is acting as Ryerson’s legal counsel on the transaction.

KeyBanc Capital Markets is acting as Olympic Steel’s financial adviser and provided a fairness opinion, Houlihan Lokey provided a fairness opinion, and Jones Day is acting as Olympic Steel’s legal counsel on the transaction.

About Ryerson

Ryerson is a leading value-added processor and distributor of industrial metals, with operations in the United States, Canada, Mexico, and China. Founded in 1842, Ryerson has around 4,300 employees in approximately 110 locations. Visit Ryerson atwww.ryerson.com.

About Olympic Steel

Founded in 1954, Olympic Steel (Nasdaq: ZEUS) is a leading U.S. metals service center focused on the direct sale and value-added processing of carbon and coated sheet, plate and coil steel products; stainless steel sheet, plate, bar and coil; aluminum sheet, plate and coil; pipe, tube, bar, valves and fittings; tin plate and metal-intensive end-use products, including stainless steel bollards; commercial, residential and industrial venting and air filtration systems; Wright® brand self-dumping hoppers; and metal canopy components. Headquartered in