Metallus Inc. (NYSE: MTUS) CEO Michael Williams reports planned share sales

Rhea-AI Filing Summary

Metallus Inc. Chief Executive Officer and director Michael S. Williams reported open-market sales of the company’s common shares. On January 8, 2026, he sold 14,462 shares at a weighted average price of $19.10 per share, and on January 9, 2026, he sold 4,835 shares at a weighted average price of $19.11 per share. After these transactions, he directly owned 697,373 common shares. The company notes that all of these sales were made under a written trading plan adopted on May 23, 2025 that is intended to satisfy the affirmative defense conditions of Exchange Act Rule 10b5-1(c).

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a 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). See Instruction 10.

1. Name and Address of Reporting Person^*

Williams Michael S

(Last) (First) (Middle)

1835 DUEBER AVE. SW

(Street)

CANTON OH 44706

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Metallus Inc. [ MTUS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

3. Date of Earliest Transaction (Month/Day/Year)
01/08/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Shares	01/08/2026		S		14,462	D	$19.1(1)	702,208	D
Common Shares	01/09/2026		S		4,835	D	$19.11(2)	697,373	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Price reported is the weighted average sale price for shares sold by the reporting owner on January 8, 2026. Shares were sold at a variety of prices ranging from $19.00 to $19.27.

2. Price reported is the weighted average sale price for shares sold by the reporting owner on January 9, 2026. Shares were sold at a variety of prices ranging from $19.00 to $19.39.

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.

	/s/ Kristine C. Syrvalin, as Attorney-in-Fact	01/09/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider activity did Metallus Inc. (MTUS) report in this Form 4?

The filing reports that Chief Executive Officer and director Michael S. Williams sold Metallus Inc. common shares in two open-market transactions on January 8 and 9, 2026.

How many Metallus (MTUS) shares did CEO Michael Williams sell and at what prices?

Michael Williams sold 14,462 common shares at a weighted average price of $19.10 on January 8, 2026, and 4,835 common shares at a weighted average price of $19.11 on January 9, 2026.

How many Metallus Inc. (MTUS) shares does Michael Williams own after these sales?

Following the reported transactions, Michael Williams directly owns 697,373 Metallus Inc. common shares.

Were the Metallus (MTUS) insider sales made under a Rule 10b5-1 trading plan?

Yes. The filing states that Michael Williams adopted a written trading plan on May 23, 2025 intended to satisfy the affirmative defense conditions of Exchange Act Rule 10b5-1(c), and all reported sales were made pursuant to that plan.

What do the weighted average prices in the Metallus (MTUS) Form 4 mean?

The reported prices of $19.10 on January 8 and $19.11 on January 9 are weighted average sale prices. The filing explains that individual shares were sold at various prices between $19.00 and $19.27 on January 8 and between $19.00 and $19.39 on January 9.

Does the Metallus (MTUS) Form 4 involve any derivative securities or options?

No derivative securities are reported in the transaction tables. The reported activity involves only non-derivative common shares of Metallus Inc.