Company: ZEUS
Filing Date: 2025-10-30
Form Type: 425
Source: 0001193125-25-257069
Chunk: 164

Company: OLYMPIC STEEL INC
Filing Date: 2025-10-30
Form: 425
Chunk 164
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under, or any other agreement to which you are a party with the Company or any of its subsidiaries or any other plan or policy maintained by the Company or any of its subsidiaries. Except as otherwise modified herein, each of the Retention Agreement, the Incentive Plans, and the awards agreements issued to you thereunder, and any other agreement to which you are a party with the Company or any of its subsidiaries shall remain in full force and effect in accordance with its existing terms and you will retain your rights thereunder as to any future changes not described in this letter agreement, except that “Good Reason” is to be measured against the reporting structure, authority, duties, position, and responsibilities assigned to at closing you in connection with your appointment as Chairman of Ryerson Holding Corporation. You acknowledge and agree that, upon the consummation of the Closing, Parent shall be a third-party beneficiary to this letter, with full rights to enforce this letter agreement and the matters documented herein

This letter agreement shall be governed by and construed in accordance with the laws of the
State of Ohio applicable to agreements made and to be performed in that state, without regard to conflict of law rules, and the exclusive venue of any legal proceeding concerning or arising under this letter agreement shall be the state and federal
district courts that are located in the State of Ohio and you hereby waive any right to trial by jury in connection with any dispute arising under or concerning this letter agreement. This letter agreement may be executed in two or more
counterparts, each of which shall be deemed to be an original but all of which together shall constitute one and the same instrument.

To confirm your agreement with the foregoing, please execute both copies of this letter agreement where indicated below and return one executed copy to Mark S. Silver, Executive Vice President, General Counsel and Chief HR Officer of Parent, and retain one copy for your files.

| Sincerely,          |     |                       |
| OLYMPIC STEEL, INC. |     |                       |
| By:                 |     | /s/ Richard A. Manson |

| Name:  |     | Richard A. Manson       |
| Title: |     | Chief Financial Officer |

| RYERSON HOLDING CORPORATION |     |                      |
| By:                         |     | /s/ Edward J. Lehner |

| Name:  |     | Edward J. Lehner        |
| Title: |     | Chief Executive Officer |

Agreed and accepted as of October 28, 2025:

| /