X0306 4 2023-03-14 0000917470 OLYMPIC STEEL INC ZEUS 0001463021 Kempthorne Dirk A C/O OLYMPIC STEEL, INC. 22901 MILLCREEK BLVD., SUITE 650 HIGHLAND HILLS OH 44122 1 Common Stock 2023-03-14 4 S 0 1000 51.27 D 0 D Restricted Share Units 2023-03-14 4 A 0 1628 0 A Common Stock 1628 42826 D Price reflects the weighted average purchase price for multiple transactions that ranged from $51.26 to $51.29 per share. The Reporting Person undertakes to provide, upon request by the Commission Staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares purchased at each separate price. Each restricted share unit represents the right to recieve one share of Olympic Steel, Inc. common stock. The restricted share units generally vest on January 1, 2024, subject to earlier vesting in certain circumstances set forth in the award agreement, but will not be delivered to the reporting person until the reporting person ceases to be a member of the Board of Directors. This total number of restricted share units includes previously-granted restricted share units with different vesting terms. /s/ Lisa K. Christen, as Attorney-in-Fact 2023-03-15