Michael S. Williams - 17 Dec 2025 Form 4 Insider Report for Metallus Inc. (MTUS)

Signature
/s/ Kristine C. Syrvalin, as Attorney-in-Fact
Issuer symbol
MTUS
Transactions as of
17 Dec 2025
Net transactions value
-$267,433
Form type
4
Filing time
18 Dec 2025, 20:00:02 UTC
Previous filing
10 Mar 2025
Next filing
09 Jan 2026

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Williams Michael S Chief Executive Officer, Director 1835 DUEBER AVE. SW, CANTON /s/ Kristine C. Syrvalin, as Attorney-in-Fact 18 Dec 2025 0001554176

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MTUS Common Shares Sale $160,469 -8,428 -1.2% $19.04 722,279 17 Dec 2025 Direct F1
transaction MTUS Common Shares Sale $106,964 -5,609 -0.78% $19.07 716,670 18 Dec 2025 Direct F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 Price reported is the weighted average sale price for shares sold by the reporting owner on December 17, 2025. Shares were sold at a variety of prices ranging from $19.00 to $19.1257.
F2 Price reported is the weighted average sale price for shares sold by the reporting owner on December 18, 2025. Shares were sold at a variety of prices ranging from $19.00 to $19.16.

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 23, 2025. All transactions reported herein were made pursuant to that plan.