Grupo Simec (NYSE: SIM) delays 2025 Form 20-F beyond Rule 12b-25 extension

Rhea-AI Filing Summary

Grupo Simec, S.A.B. de C.V. has disclosed that it will not be able to file its Annual Report on Form 20-F for the year ended December 31, 2025 within the additional time granted under Rule 12b-25. The delay is attributed to final administrative steps needed to complete the submission.

The Company expects to file the Form 20-F in the near term. In the meantime, it directs investors to previously furnished Form 6-K reports dated May 1, 2026, which contain its results of operations for full-year 2025 and for the first three months of 2026.

Positive

• None.

Negative

• Annual report filing delayed beyond 12b-25 extension – The Company will not file its 2025 Form 20-F within the additional time afforded under Rule 12b-25, indicating a compliance timetable slippage even though the delay is described as administrative.

Insights

Cross-border reporting & compliance analyst

Grupo Simec misses extended 20-F deadline but cites administrative causes and points to existing 6-K results.

Grupo Simec states it cannot file its 2025 Form 20-F within the extra time allowed by Rule 12b-25, citing remaining administrative steps. This represents a delay beyond the standard late-filing grace period for a foreign private issuer.

The Company notes that operating results are already available through Form 6-K reports furnished on May 1, 2026 for both full-year 2025 and the first quarter of 2026. This helps reduce informational gaps even though the formal annual report is late.

The filing indicates an expectation to submit the Form 20-F "in the near term," without specifying timing. Investors may focus on future disclosures that confirm when the annual report is filed and whether any further compliance updates are needed.

Key Terms

Form 6-K, Form 20-F, Rule 12b-25, foreign private issuer

4 terms

Form 6-K regulatory

"To access the Company’s results of operations ... refer to the Company’s Form 6-K furnished to the Securities and Exchange Commission on May 1, 2026."

A Form 6-K is a report that companies listed in certain countries file to provide important updates, such as financial results, corporate changes, or other significant information, to regulators and investors. It functions like an official company update or news release, helping investors stay informed about developments that could affect their investment decisions.

Form 20-F regulatory

"the Company will not able to file its Annual Report on Form 20-F for the fiscal year ended December 31, 2025"

Form 20-F is the standardized annual disclosure that non-U.S. companies must file with the U.S. securities regulator when their shares are traded in the U.S.; it contains audited financial statements, a plain-language description of the business, management discussion, governance details and key risk factors. It matters to investors because it provides a consistent, comparable company “report card” and rulebook, helping buyers assess financial health, governance and risks before investing.

Rule 12b-25 regulatory

"within the additional time afforded under Rule 12b-25 under the Securities Exchange Act of 1934."

Rule 12b-25 is an SEC filing provision that lets a company notify regulators and the public that it cannot file a required periodic report (like a quarterly or annual report) on time and explains the reason for the delay. For investors, the notice is a formal heads-up that financial information will arrive late—similar to a company calling to say it will be late turning in homework—so it signals increased uncertainty and may affect trading and risk assessments until the filing is available.

foreign private issuer regulatory

"FORM 6-K REPORT OF A FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16"

A foreign private issuer is a company organized outside the United States that meets tests showing it is primarily foreign-controlled and therefore qualifies for a different set of U.S. reporting rules. For investors, that means the company files less frequent or differently formatted disclosures with U.S. regulators and may follow home-country accounting and governance practices, so buying its stock is like dining at a well-reviewed restaurant that follows its home kitchen’s rules instead of the local menu — you get access but should check what standards apply.

Form 6-K: How Foreign Companies Report to the SEC →

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF A FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of May 2026

Commission File Number: 1-11176

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

(Translation of Registrant’s Name into English)

Av. Lázaro Cardenas 601

Colonia la Nogalera, Guadalajara, Jalisco

México 44440

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒       Form 40-F ☐

PRESS RELEASE

Contact: Mario Moreno Cortez

Grupo Simec, S.A.B. de C.V.

Calzada Lázaro Cárdenas 601

44440 Guadalajara, Jalisco, México

+52 55 1165 1025

Guadalajara, Jalisco, May 15, 2026

Grupo Simec, S.A.B. de C.V. (the “Company”) hereby informs that, notwithstanding the Notification of Late Filing on Form 12b-25 filed by the Company on May 1, 2026, the Company will not able to file its Annual Report on Form 20-F for the fiscal year ended December 31, 2025 (the “Form 20-F”) with the U.S. Securities and Exchange Commission within the additional time afforded under Rule 12b-25 under the Securities Exchange Act of 1934. The delay is due to the finalization of certain administrative steps necessary to complete the submission of the Form 20-F. The Company anticipates filing the Form 20-F in the near term.

In the meantime, to access the Company’s results of operations as of and for the year ended December 31, 2025, please refer to the Company’s Form 6-K furnished to the Securities and Exchange Commission on May 1, 2026. To access the Company’s results of operations as of and for the first three months of 2026, please refer to the Company’s Form 6-K furnished to the Securities and Exchange Commission on May 1, 2026.

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: May 15, 2026

	GRUPO SIMEC, S.A.B. DE C.V.
	By:	/s/ Mario Moreno Cortez
	Name:	Mario Moreno Cortez
	Title:	Coordinator of Finance

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FAQ

Why is Grupo Simec (SIM) delaying its 2025 Form 20-F filing?

Grupo Simec is delaying its 2025 Form 20-F because it is still completing certain administrative steps needed to finalize the submission. The Company describes these as procedural matters and indicates it expects to file the report in the near term once those steps are completed.

Did Grupo Simec (SIM) miss the extended 20-F deadline under Rule 12b-25?

Yes. Grupo Simec states it will not be able to file its 2025 Form 20-F within the additional time afforded by Rule 12b-25. This means the annual report remains outstanding even after the standard late-filing grace period granted for foreign private issuers.

Where can investors see Grupo Simec’s 2025 results while the Form 20-F is delayed?

Investors can see Grupo Simec’s 2025 results in a Form 6-K furnished to the SEC on May 1, 2026. That report contains the Company’s results of operations for the year ended December 31, 2025, even though the formal Form 20-F is not yet filed.

How can investors view Grupo Simec (SIM) Q1 2026 financial information?

Grupo Simec directs investors to a Form 6-K furnished on May 1, 2026 for its first-quarter 2026 information. That filing contains the Company’s results of operations for the first three months of 2026 while the annual Form 20-F filing remains pending.

Does Grupo Simec provide a timeline for filing the delayed 2025 Form 20-F?

Grupo Simec does not provide a specific deadline but states it anticipates filing the 2025 Form 20-F in the near term. The Company links the delay to final administrative steps required to complete the submission rather than to changes in its underlying financial results.