Metallus (NYSE: MTUS) CEO sells 603 shares in planned trade on Jan. 15

Rhea-AI Filing Summary

Metallus Inc. Chief Executive Officer and director Michael S. Williams reported a small open-market sale of 603 common shares on January 15, 2026. The transaction was coded as a sale at a weighted average price of about $21.00 per share, with individual trades executed between $21.00 and $21.01.

After this sale, Williams beneficially owns 696,770 Metallus common shares directly. All reported transactions were made under a written Rule 10b5-1 trading plan for Metallus common shares that he adopted on May 23, 2025, indicating the sales were pre-arranged rather than discretionary trades based on recent company developments.

Insider Trade Summary

Net Seller: 603 shares ($12,663)

Net Sell 1 txn

Insider Williams Michael S

Role Chief Executive Officer

Sold 603 shs ($13K)

Type	Security	Shares	Price	Value
Sale	Common Shares	603	$21.00	$13K

Holdings After Transaction: Common Shares — 696,770 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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)
01/15/2026

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	01/15/2026		S		603	D	$21(1)	696,770	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 15, 2026. Shares were sold at prices ranging from $21.00 to $21.01.

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	01/16/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did Metallus (MTUS) report for its CEO?

Metallus Inc. CEO and director Michael S. Williams reported selling 603 common shares on January 15, 2026 in an open-market transaction.

At what price did the Metallus (MTUS) CEO sell shares on January 15, 2026?

The CEO’s sale used a weighted average price of $21.00 per share, with individual trades executed at prices ranging from $21.00 to $21.01.

How many Metallus (MTUS) shares does the CEO own after this Form 4 transaction?

Following the reported sale, Michael S. Williams beneficially owns 696,770 Metallus common shares directly.

Was the Metallus (MTUS) CEO’s share sale under a Rule 10b5-1 trading plan?

Yes. All transactions reported were made under a written Rule 10b5-1(c) trading plan for Metallus common shares adopted on May 23, 2025.

What type of security was involved in this Metallus (MTUS) insider trade?

The transaction involved Metallus Inc. common shares reported as non-derivative securities on the Form 4.

Does the Form 4 show any Metallus (MTUS) derivative security activity for the CEO?

No derivative security acquisitions or disposals are listed; the Form 4 shows activity only in non-derivative common shares for this date.