Metallus director receives 7,090-share equity award

Baker Mary Ellen reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Baker Mary Ellen reported acquisition or exercise transactions in this Form 4 filing.

Metallus Inc. director Mary Ellen Baker received an equity grant in the form of restricted stock units tied to the company’s common shares. The award covers 7,090 common shares and was granted at no cash cost to her, reflecting stock-based compensation rather than a market purchase.

These restricted stock units will vest in full on April 30, 2027, subject to the terms of the grant agreement. After this award, Baker directly holds 36,170 common shares, showing her overall equity position with Metallus as reported in this filing.

Insider Trade Summary

Grant/Award: 7,090 shares

Grant/Award 1 txn

Insider Baker Mary Ellen

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Shares	7,090	$0.00	$0.00

Holdings After Transaction: Common Shares — 36,170 shares (Direct)

Footnotes (1)

1. F1. The reported transaction is an award of restricted stock units which will vest in full on April 30, 2027, subject to the terms of the grant agreement.

Key Figures

RSU grant size: 7,090 shares Grant price: $0.00 per share Shares after transaction: 36,170 shares +1 more

4 metrics

RSU grant size 7,090 shares Restricted stock unit award of common shares

Grant price $0.00 per share Reported price for the RSU award

Shares after transaction 36,170 shares Director’s direct common share holdings after award

Vesting date April 30, 2027 RSUs vest in full on this date per grant terms

Key Terms

restricted stock units, grant, award, or other acquisition, common shares

3 terms

restricted stock units financial

"The reported transaction is an award of restricted stock units which will vest in full on April 30, 2027"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

common shares financial

"security_title: Common Shares"

Common shares are the basic units of ownership in a company that give holders a claim on profits and a right to vote on key matters, like electing the board. Think of them as membership cards in a club: they let you share in successes and losses, but in a bankruptcy or liquidation they are paid after creditors and preferred shareholders, so their value can swing more and matters for assessing risk and potential return.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Metallus (MTUS) director Mary Ellen Baker report in this Form 4?

Mary Ellen Baker reported receiving an equity grant of 7,090 restricted stock units tied to Metallus common shares. The award was granted at no cash cost and represents stock-based compensation, increasing her direct holdings to 36,170 common shares after the transaction.

How many Metallus (MTUS) shares were included in Baker’s latest equity award?

The award covers 7,090 Metallus common shares through restricted stock units. These units represent a promise of shares that will be delivered if vesting conditions are met, rather than an immediate cash purchase of stock in the open market.

When do Mary Ellen Baker’s new Metallus (MTUS) restricted stock units vest?

The restricted stock units granted to Mary Ellen Baker will vest in full on April 30, 2027. Vesting means the units convert into actual shares, provided she satisfies the conditions detailed in the underlying grant agreement during the vesting period.

How many Metallus (MTUS) shares does Mary Ellen Baker own after this filing?

After this equity award, Mary Ellen Baker directly holds 36,170 Metallus common shares. This figure includes the impact of the 7,090-share restricted stock unit grant reported in the filing and reflects her direct ownership position as of the transaction date.

Was the Metallus (MTUS) director’s transaction a market purchase or stock-based compensation?

The transaction was stock-based compensation, not a market purchase. Mary Ellen Baker received 7,090 restricted stock units at a stated price of $0.00 per share, indicating a grant or award rather than buying shares on the open market for cash.

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

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Accepted by SEC EDGAR 04/30/2026 - 07:00 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).

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^*

Baker Mary Ellen

(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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/30/2026

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	04/30/2026		A		7,090(1)	A	$0	36,170	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. The reported transaction is an award of restricted stock units which will vest in full on April 30, 2027, subject to the terms of the grant agreement.

	/s/ Kristine C. Syrvalin, as Attorney-in-Fact	04/30/2026
	** 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)