TIM S.A. files 2026 Form 20-F annual report

TIM S.A., a Brazilian telecommunications company listed on B3 and the NYSE, has filed its 2026 annual report on Form 20-F for the calendar year ended December 31, 2025 with the U.S. Securities and Exchange Commission.

Rhea-AI Filing Summary

TIM S.A., a Brazilian telecommunications company listed on B3 and the NYSE, has filed its 2026 annual report on Form 20-F for the calendar year ended December 31, 2025 with the U.S. Securities and Exchange Commission.

The company states that the Form 20-F can be downloaded from its Investor Relations website and that shareholders may request a free hard copy of the report and complete financial statements by email. The notice also provides contact details for the Investor Relations team and officer for any further information.

Key Terms

Form 6-K, Form 20-F, foreign private issuer, Investor Relations

4 terms

Form 6-K regulatory

"FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER"

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

"Filing of annual report on Form 20-F for the year ended on 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.

foreign private issuer regulatory

"REPORT OF 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.

Investor Relations financial

"Investor Relations website, www.tim.com.br/ir"

Investor relations is the communication process between a company and its current or potential investors. It involves sharing information about the company's performance, strategies, and outlook to help investors make informed decisions. Effective investor relations build trust and transparency, similar to a clear conversation between a business and someone considering investing, ensuring both parties understand each other's interests and expectations.

FAQ

What did TIMB disclose in this Form 6-K filing?

TIMB disclosed that it has filed its 2026 annual report on Form 20-F for the year ended December 31, 2025 with the SEC. The notice highlights how investors can access or request the full report and financial statements from the company.

Where can investors access TIMB’s Form 20-F for 2025?

Investors can download TIMB’s Form 20-F for the year ended December 31, 2025 from the company’s Investor Relations website at www.tim.com.br/ir. The filing explicitly directs shareholders and the market to this online source for the complete annual report.

How can TIMB shareholders request a hard copy of the Form 20-F?

Shareholders can request a free hard copy of TIMB’s Form 20-F and complete financial statements by emailing ri@timbrasil.com.br. The company states that these materials are provided without charge when requested through this Investor Relations contact channel.

Who is the Investor Relations Officer mentioned in TIMB’s notice?

The notice identifies Vicente de Moraes Ferreira as TIM S.A.’s Investor Relations Officer. It states that shareholders can contact him and the Investor Relations team through the provided channels for any further information regarding the Form 20-F annual report.

What period does TIMB’s filed Form 20-F cover?

TIMB’s filed Form 20-F covers the calendar year ended December 31, 2025. The company describes this report as its 2026 annual report on Form 20-F, prepared for that specific financial year and submitted to the U.S. Securities and Exchange Commission.

What is the purpose of TIMB’s Form 6-K notice to the market?

The Form 6-K notice informs shareholders and the broader market that TIMB has filed its annual Form 20-F with the SEC. It explains where the document is available, how to request hard copies, and provides Investor Relations contact details for additional information.

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Accepted by SEC EDGAR 03/30/2026 - 06:41 PM Learn about SEC filing dates

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

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934

Date of Report: March 30, 2026

Commission File Number: 001-39570

TIM S.A.
(Exact name of Registrant as specified in its Charter)

João Cabral de Melo Neto Avenue, 850 – North Tower – 12^th floor
22775-057 Rio de Janeiro, RJ, Brazil
(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 ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1).

Yes ☐ No ☒

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7).

Yes ☐ No ☒

TIM S.A.

Publicly-Held Company

Corporate Taxpayer's ID (CNPJ/MF): 02.421.421/0001-11

Corporate Registry (NIRE): 33.300.324.631

NOTICE TO THE MARKET

Filing of annual report on Form 20-F for the year ended on December 31, 2025

TIM S.A. (“Company”) (B3: TIMS3; NYSE: TIMB) hereby informs its shareholders and the market in general that it has filed its 2026 annual report (“Form 20-F”) for the calendar year ended on December 31, 2025, with the U.S. Securities and Exchange Commission ("SEC").

The Form 20-F is available for download on the Company's Investor Relations website, www.tim.com.br/ir, and, in addition, shareholders may receive a hard copy of the Form 20-F and the complete financial statements, free of charge, by requesting in the following email ri@timbrasil.com.br.

Any further information regarding the Form 20-F can be obtained by contacting Investor Relations Team and/or Mr. Vicente de Moraes Ferreira, Investor Relations Officer of TIM S.A. through the channels indicated above.

Rio de Janeiro, March 30^th, 2026.

TIM S.A.

Vicente de Moraes Ferreira

Investor Relations Officer

SIGNATURES

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.

		TIM S.A.
Date: March 30, 2026		By:	/s/ Alberto Mario Griselli
			Alberto Mario Griselli
			Chief Executive Officer, Chief Financial Officer and Investor Relations Officer