Ternium (TX) Chief Planning Officer files initial insider Form 3

Rhea-AI Filing Summary

Ternium S.A. executive Oscar Montero Martinez, the company’s Chief Planning Officer, filed an initial ownership report on Form 3. This filing identifies him as an officer subject to insider reporting rules but does not list any share transactions or current holdings in this excerpt.

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SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

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1. Name and Address of Reporting Person^*

Montero Martinez Oscar

(Last) (First) (Middle)

26, BOULEVARD ROYAL, 4TH FLOOR

(Street)

LUXEMBOURG N4 00000

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
03/17/2026

3. Issuer Name and Ticker or Trading Symbol
Ternium S.A. [ TX ]

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

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

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

No securities are beneficially owned.

	/s/ Bruno Antenucci by Power of Attorney	03/17/2026
	** 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 5 (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.
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FAQ

What does the Ternium (TX) Form 3 filing by Oscar Montero Martinez show?

The Form 3 filing shows that Oscar Montero Martinez is a Chief Planning Officer of Ternium S.A. and is now subject to insider reporting. The excerpt does not list any share transactions or derivative positions for him.

Does the Ternium (TX) Form 3 report any insider share purchases or sales?

No, this Form 3 excerpt reports no insider share purchases or sales. The transaction summary shows zero buy, sell, acquire, or dispose events, indicating only an initial registration of insider status for the officer.

Who is the reporting person in the Ternium (TX) Form 3 filing?

The reporting person is Oscar Montero Martinez, identified as an officer of Ternium S.A. with the title Chief Planning Officer. The filing formally records his status as an insider required to report future ownership changes.

Are any derivative securities disclosed in this Ternium (TX) Form 3?

No derivative securities are disclosed in this excerpt. The derivativeSummary section is empty and the transaction summary shows zero derivative transactions, so no options, warrants, or similar instruments are listed for the reporting officer here.

What does the transaction summary indicate in the Ternium (TX) Form 3?

The transaction summary indicates no activity: buyCount, sellCount, acquireCount, disposeCount, and derivativeTransactionCount are all zero. Net buy/sell direction is marked neutral, reflecting that this is purely an initial ownership reporting event in the excerpt.