Metallus Inc. — Director's Dealing 2026

Feb 4, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Metallus Inc. (MTUS)
CIK: 0001598428
Period of Report: 2026-02-03

Reporting Person: Williams Michael S (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-03	Common Shares	S	19017	$21.03	Disposed	677753	Direct
2026-02-04	Common Shares	S	13713	$21.28	Disposed	664040	Direct

Footnotes

F1: Price reported is the weighted average sale price for shares sold by the reporting owner on February 3, 2026. Shares were sold at a variety of prices ranging from $21.00 to $21.17.

F2: Price reported is the weighted average sale price for shares sold by the reporting owner on February 4, 2026. Shares were sold at a variety of prices ranging from $21.00 to $21.54.