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: WESTBROOKS KRISTOPHER R (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-03	Common Shares	M	2951	$12.45	Acquired	192027	Direct
2026-02-03	Common Shares	S	2951	$21.03	Disposed	189076	Direct
2026-02-04	Common Shares	M	2128	$12.45	Acquired	191204	Direct
2026-02-04	Common Shares	S	2128	$21.28	Disposed	189076	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-03	Nonqualified Stock Option (Right to buy)	$12.45	M	2951	Disposed	2029-03-01	Common Shares (2951)	Direct
2026-02-04	Nonqualified Stock Option (Right to buy)	$12.45	M	2128	Disposed	2029-03-01	Common Shares (2128)	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.

F3: Vested in four equal annual installments beginning March 1, 2020.