Metallus CEO Michael S. Williams sells 12,570 shares

Metallus Inc. (MTUS) Chief Executive Officer Michael S. Williams sold 12,570 common shares on October 2, 2026, at a weighted average price of $20.0066 per share; sale prices ranged from $20.0000 to $20.0100.

Rhea-AI Filing Summary

Metallus Inc. (MTUS) Chief Executive Officer Michael S. Williams sold 12,570 common shares on October 2, 2026, at a weighted average price of $20.0066 per share; sale prices ranged from $20.0000 to $20.0100. Williams held 722,288 shares directly following the transaction. The sale was made under a written Rule 10b5-1(c) plan adopted May 18, 2026.

Insider Trade Summary 10b5-1

Net Seller: 12,570 shares

Net Sell 1 txn

Insider Williams Michael S

Role Chief Executive Officer

Sold 12,570 shs ($251K)

Type	Security	Shares	Price	Value
Sale	Common Shares F1	12,570	$20.0066	$251K

Holdings After Transaction: Common Shares — 722,288 shares (Direct)

Footnotes (1)

1. 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.

Key Figures

Common shares sold: 12,570 shares Weighted average sale price: $20.0066 per share Sale price range: $20.0000 to $20.0100 per share +1 more

4 metrics

Common shares sold 12,570 shares Michael S. Williams, October 2, 2026

Weighted average sale price $20.0066 per share Sale on October 2, 2026

Sale price range $20.0000 to $20.0100 per share Shares sold on October 2, 2026

Direct shares following transaction 722,288 shares Michael S. Williams after the October 2, 2026 transaction

Key Terms

Rule 10b5-1(c), weighted average sale price, affirmative defense

3 terms

Rule 10b5-1(c) regulatory

"affirmative defense conditions of Exchange Act Rule 10b5-1(c)"

Rule 10b5-1(c) is an SEC guideline that lets company insiders set up a written, pre-planned schedule to buy or sell their company stock when they are not in possession of material, nonpublic information. For investors, it matters because such plans can reduce the appearance of insider trading by separating decisions from inside knowledge—like putting your trades on autopilot—while also requiring scrutiny since pre-planned trades can still affect market confidence and share value.

weighted average sale price financial

"Price reported is the weighted average sale price"

affirmative defense regulatory

"intended to satisfy the affirmative defense conditions"

FAQ

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How many MTUS shares did CEO Michael S. Williams sell, and at what price?

Michael S. Williams sold 12,570 Metallus common shares on October 2, 2026, at a weighted average price of $20.0066 per share. The shares were sold at prices ranging from $20.0000 to $20.0100, and the transaction was made under a written Rule 10b5-1(c) plan adopted May 18, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/02/2026 - 08:00 PM Accepted by SEC EDGAR 10/02/2026 - 08:00 PM Learn about SEC filing dates

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 OHIO 44706

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/02/2026

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

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

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

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	10/02/2026		S		12,570	D	$20.0066(1)	722,288	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 October 2, 2026. Shares were sold at a variety of prices ranging from $20.0000 to $20.0100.

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.

	/s/ Kristine C. Syrvalin, as Attorney-in-Fact	10/02/2026
	** 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.
* Form 4: SEC 1474 (03-26)