GRUPO SIMEC, S.A.B. de C.V.

UNITED STATES OF AMERICA

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 20-F

☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934

OR

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31,2025

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

OR

☐ SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number 1-11176

GRUPO SIMEC, S.A.B. de C.V.

(Exact name of registrant as specified in its charter)

SIMEC GROUP CORPORATION

(Translation of registrant’s name into English)

UNITED MEXICAN STATES

(Jurisdiction of incorporation or organization)

**Calzada Lázaro Cárdenas 601

Colonia La Nogalera

**Guadalajara, Jalisco **

México 44440

(Address of principal executive offices)

Mario Moreno Cortez

Calzada Lázaro Cárdenas 601

Colonia La Nogalera

Guadalajara, Jalisco

México 44440

Telephone:(5233) 3770-6700,

E-mail: mmoreno@gruposimec.com.mx

(Name, telephone, e-mail and/or facsimile number and address of company contact person)

Securities registered or to be registered pursuant to Section 12(b) of the Act:

Securities registered or to be registered pursuant to Section 12(g) of the Act: None

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act: None

Indicate the number of outstanding shares of each of the issuer’s classes of capital or common stock as of the close of the period covered by the annual report:

Series B Common Stock —497,709,214 shares as of December 31, 2025

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐No ☒

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934. Yes ☐No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically, every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or an emerging growth company. See definition of “large accelerated filer,” “accelerated filer,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.:

If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards†provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements.☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing:

If “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow. Item 17 ☐ Item 18 ☐

If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No☒

Table of Contents

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CERTAIN TERMS

Grupo Simec, S.A.B. de C.V. is a corporation (Sociedad anónima bursátil de capital variable) organized under the laws of the United Mexican States (“Mexico”). Unless the context requires otherwise, when used in this annual report, the terms “we,” “our,” “the company,” “our company” and “us” refer to Grupo Simec, S.A.B. de C.V., together with its consolidated subsidiaries.

References in this annual report to “U.S. dollars” or “U.S.$” are to the lawful currency of the United States. References in this annual report to “pesos” or “Ps.” are to the lawful currency of Mexico. References in this annual report to “real” are to the lawful currency of the Federative Republic of Brazil. References to “tons” in this annual report refer to tons; a metric ton equals 1,000 kilograms or 2,204 pounds. We publish our financial statements in pesos.

The terms “special bar quality steel” or “SBQ steel” refer to steel that is hot rolled or cold finished into round square, or hexagonal steel bars that generally contain higher proportions of alloys than commercial grades of steel. SBQ steel is produced with precise chemical specifications and generally is made to order following client specifications.

This annual report contains translations of certain peso amounts to U.S. dollars at specified rates solely for your convenience. These translations do not mean that the peso amounts actually represent such dollar amounts or could be converted into U.S. dollars at the rate indicated. Unless otherwise indicated, we have translated these U.S. dollar amounts from pesos at the exchange rate of Ps. 17.9528 per U.S.$1.00, the interbank transactions rate in effect on December 31, 2025. On July 15, 2026, the interbank transaction rate for the peso was Ps. 17.5023 per U.S.$1.00.

FORWARD LOOKING STATEMENTS

This annual report contains words, such as “believe,” “expect,” “anticipate,” “plans” and similar expressions that identify forward-looking statements, which reflect our views about future events and financial performance. We have made forward-looking statements that address, among other things our:

Actual results could differ materially from those projected in such forward-looking statements as a result of various factors that may be beyond our control. These factors include, but are not limited to:

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Forward looking statements speak only as of the date of this filing, and we undertake no obligation to publicly update or to revise any forward looking statements after the date of this annual report because of new information, future events or other factors. In light of the risks and uncertainties described above, the forward looking events and circumstances discussed in this annual report might not occur.

For a discussion of important factors that could cause actual results to differ materially from those contained in any forward-looking statement, see “Item 3—Key Information—Risk Factors.”

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