Ken Garcia V - 31 Dec 2025 Form 4 Insider Report for Metallus Inc. (MTUS)

Role: Director
Signature: /s/ Kristine C. Syrvalin, as Attorney-in-Fact
Issuer symbol: MTUS
Transactions as of: 31 Dec 2025
Net transactions value: +$26,255
Form type: 4
Filing time: 02 Jan 2026, 17:00:07 UTC
Previous filing: 01 Oct 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Garcia Ken V	Director	1835 DUEBER AVE. SW, CANTON	/s/ Kristine C. Syrvalin, as Attorney-in-Fact	02 Jan 2026	0001877053

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	MTUS	Phantom Shares	Award	$26,255	+1,530	+6.6%	$17.16	24,622	31 Dec 2025	Common Shares	1,530		Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each phantom share is the equivalent of one Issuer common share.
F2	Phantom shares are payable in cash and/or common shares upon termination of the Reporting Person's service on the Board of Directors, as elected by the Reporting Person at the time he elected to defer compensation under the Metallus Inc. Director Deferred Compensation Plan.