Michael S. Williams - 02 Oct 2026 Form 4 Insider Report for Metallus Inc. (MTUS)

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: MTUS
Reported as of: 02 Oct 2026
Net transaction value: -$251,483
SEC form: 4
Accepted by SEC: 02 Oct 2026, 20:00:03 UTC
Prior SEC filing: 02 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Kristine C. Syrvalin, as Attorney-in-Fact

Key filing fact

Michael S. Williams filed Form 4 for Metallus Inc. (MTUS) on 02 Oct 2026.

Key facts

This page summarizes Michael S. Williams's Form 4 filing for Metallus Inc. (MTUS).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 02 Oct 2026, 20:00.

Change

Previous filing in this sequence was filed on 02 Mar 2026.
Current net transaction value: -$251,483.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001554176 Primary reporting owner

Williams Michael S

Relationship: Chief Executive Officer, Director
Address: 1835 DUEBER AVE. SW, CANTON
Signature: /s/ Kristine C. Syrvalin, as Attorney-in-Fact
Signature date: 02 Oct 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MTUS transaction

Common Shares

Sale

Transaction value: $251,483
Shares: -12,570
Change %: -1.7%
Price: $20.01
Shares after: 722,288
Date: 02 Oct 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 1 footnote

Footnote F1

Price reported is the weighted average sale price for shares sold by the reporting owner on October 2, 2026. Shares were sold at a variety of prices ranging from $20.0000 to $20.0100.

SEC remarks

The reporting person adopted a written plan for the sale of the Company's common shares intended to satisfy the affirmative defense conditions of Exchange Act Rule 10b5-1(c) on May 18, 2026. All transactions reported herein were made pursuant to that plan.