Metallus Inc. — Director's Dealing 2026

Jan 9, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Metallus Inc. (MTUS)
CIK: 0001598428
Period of Report: 2026-01-08

Reporting Person: Williams Michael S (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-01-08	Common Shares	S	14462	$19.10	Disposed	702208	Direct
2026-01-09	Common Shares	S	4835	$19.11	Disposed	697373	Direct

Footnotes

F1: Price reported is the weighted average sale price for shares sold by the reporting owner on January 8, 2026. Shares were sold at a variety of prices ranging from $19.00 to $19.27.

F2: Price reported is the weighted average sale price for shares sold by the reporting owner on January 9, 2026. Shares were sold at a variety of prices ranging from $19.00 to $19.39.