Metallus (NYSE: MTUS) insider plans sale of 5,172 shares under Rule 144

Rhea-AI Filing Summary

Metallus Inc. insider plans to sell 5,172 common shares under Rule 144. The notice covers common stock to be sold through Merrill Lynch from its Columbus, Ohio office, with an approximate sale date of 01/15/2026 on the NYSE. The filing states there were 42,023,268 common shares outstanding when the notice was prepared.

The 5,172 shares to be sold were acquired on 03/01/2019 via a stock option exercise from Metallus Inc., with a compensatory form of payment. Over the prior three months, Kristopher Westbrooks sold 10,932 common shares on 01/14/2026 for gross proceeds of 219,254.38, as disclosed in the notice.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Merrill Lynch 8890 Lyra Drive 5th Floor Columbus OH 43240	5172	108618	42023268	01/15/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	03/01/2019	Stock Option Exercise	METALLUS INC.			5172	01/15/2026	COMPENSATORY PAYMENT

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Kristopher Westbrooks 1835 DUEBER AVENUE SW CANTON OH 44706	Common	01/14/2026	10932	219254.38

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the Metallus (MTUS) Form 144 filing disclose?

The Form 144 notice discloses an insider’s intent to sell 5,172 shares of Metallus Inc. common stock on the NYSE through Merrill Lynch around 01/15/2026.

How many Metallus (MTUS) shares are covered by the planned Rule 144 sale?

The planned Rule 144 transaction covers 5,172 common shares of Metallus Inc., to be sold through Merrill Lynch on the NYSE.

How were the Metallus (MTUS) shares being sold acquired?

The 5,172 Metallus common shares were acquired on 03/01/2019 via a stock option exercise from Metallus Inc., with compensatory payment as consideration.

What recent Metallus (MTUS) share sales by this person are disclosed?

The notice shows that Kristopher Westbrooks sold 10,932 common shares of Metallus Inc. on 01/14/2026, generating gross proceeds of 219,254.38.

How many Metallus (MTUS) shares were outstanding when the Form 144 was prepared?

The filing reports that 42,023,268 common shares of Metallus Inc. were outstanding at the time the notice was completed.

What representation does the Metallus (MTUS) insider make in the Form 144?

By signing, the insider represents that they do not know of any material adverse information about Metallus Inc.’s current or prospective operations that has not been publicly disclosed.