Southern Copper director corrects 400-share error

Southern Copper director Luis Miguel Palomino Bonilla’s amended Form 4 says the 400-share sale never happened and confirms 1,703 shares remain.

Rhea-AI Filing Summary

SOUTHERN COPPER CORP (SCCO) director Luis Miguel Palomino Bonilla filed an amended Form 4 to correct an earlier report. A prior Form 4 filed on 9/1/26 erroneously reported a sale of 400 shares of Common Stock; the amendment states that no such sale occurred. The filing instead confirms that the reporting person beneficially owns 1,703 shares of Common Stock directly, consistent with the position prior to the erroneous filing.

Insider Trade Summary

Sale: 0 shares

Sale 1 txn

Insider PALOMINO BONILLA LUIS MIGUEL

Role Director

Sold 0 shs ($0.00)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	0	$0.00	$0.00

Holdings After Transaction: Common Stock — 1,703 shares (Direct)

Footnotes (1)

1. F1. This Form 4/A is being filed to amend the Form 4 filed earlier today on 9/1/26, which erroneously reported a sale of 400 shares of Common Stock. No such sale has occurred. The reporting person intended to file a Form 144 to report a proposed sale of securities rather than a completed transaction. This amendment deletes transaction reported in error and accurately reflects the reporting person's amount of securities beneficially owned prior to such filing.

Key Figures

Erroneously reported sale: 400 shares of Common Stock Shares beneficially owned: 1,703 shares of Common Stock Reported transaction shares in this amendment: 0 shares

3 metrics

Erroneously reported sale 400 shares of Common Stock Sale of 400 shares reported on Form 4 filed earlier on 9/1/26, now deleted

Shares beneficially owned 1,703 shares of Common Stock Beneficial ownership position confirmed after deleting erroneous transaction

Reported transaction shares in this amendment 0 shares Amended Form 4 shows no actual sale occurring on 2026-08-31

Key Terms

Form 4/A, Form 144, beneficially owned

3 terms

Form 4/A regulatory

"This Form 4/A is being filed to amend the Form 4 filed earlier"

Form 4/A is an amended filing that corrects or updates an earlier Form 4, the mandatory report that insiders (like company executives, directors, or large shareholders) must file when their ownership stakes change. Think of it as an edited receipt showing who bought or sold stock and when; investors use it to track insider confidence, detect potential conflicts, and spot trading patterns that might signal future company prospects.

Form 144 regulatory

"The reporting person intended to file a Form 144 to report a proposed sale"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

beneficially owned financial

"accurately reflects the reporting person's amount of securities beneficially owned"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

FAQ

What does SCCO's amended Form 4 report for Luis Miguel Palomino Bonilla?

It reports that a previously disclosed sale of 400 shares of Southern Copper Corp Common Stock was erroneous and that no sale occurred. The amendment deletes the incorrect transaction and confirms the director’s beneficial ownership position.

Did Luis Miguel Palomino Bonilla actually sell SCCO shares in this Form 4/A?

No. The footnote explains that the earlier Form 4 mistakenly reported a sale of 400 shares. The amended Form 4/A clarifies that no such sale occurred and removes the transaction from the record.

How many SCCO shares does Luis Miguel Palomino Bonilla beneficially own after this amendment?

After this amendment, Luis Miguel Palomino Bonilla is reported as beneficially owning 1,703 shares of Southern Copper Corp Common Stock directly. This amount reflects his holdings prior to the erroneous sale report.

Why did the SCCO insider intend to file a Form 144 instead of Form 4?

The footnote states the reporting person intended to file a Form 144 to report a proposed sale of securities, not a completed transaction. The incorrect Form 4 reported an actual sale, which this Form 4/A now deletes.

Was the SCCO Form 4/A filed under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is unchecked, and the footnote does not describe any transaction under a 10b5-1 plan. The main purpose is to correct an earlier erroneous sale report.

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

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Available on EDGAR 09/01/2026 - 05:23 PM Accepted by SEC EDGAR 09/01/2026 - 05:23 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^*

PALOMINO BONILLA LUIS MIGUEL

(Last) (First) (Middle)

C/O SOUTHERN COPPER CORPORATION

7310 NORTH 16TH ST. SUITE 135

(Street)

PHOENIX ARIZONA 85020

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
SOUTHERN COPPER CORP/ [ SCCO ]

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)
08/31/2026

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)
09/01/2026

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 Stock	08/31/2026		S		0	D(1)	$0	1,703	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. This Form 4/A is being filed to amend the Form 4 filed earlier today on 9/1/26, which erroneously reported a sale of 400 shares of Common Stock. No such sale has occurred. The reporting person intended to file a Form 144 to report a proposed sale of securities rather than a completed transaction. This amendment deletes transaction reported in error and accurately reflects the reporting person's amount of securities beneficially owned prior to such filing.

	/s/ Andres Carlos Ferrero, Attorney-in-Fact	09/01/2026
	** 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)