[6-K] TIM S.A. Current Report (Foreign Issuer)

Rhea-AI Filing Summary

TIM S.A. (TIMB) reported that its Fiscal Council met on November 3, 2025 to review corporate matters and the Quarterly Information Report (ITR) for Q3 2025, dated September 30, 2025. Management presented updates on tax, regulatory, civil and labor contingencies and highlighted key points from the ITR.

Ernst & Young presented its limited review of the Q3 2025 ITR and reported no irregularities or reservations. The Fiscal Council concluded the quarterly information is appropriate for presentation to the Board of Directors.

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: November 3, 2025

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

CNPJ/MF 02.421.421/0001-11

NIRE 333.0032463-1

MINUTES OF THE FISCAL COUNCIL’S MEETING

HELD ON NOVEMBER 3^rd, 2025

DATE, TIME AND PLACE: November 3^rd, 2025, at 9.30 a.m., at the head office of TIM S.A. (“Company”), domiciled at Avenida João Cabral de Mello Neto, 850, Torre Sul, 13° floor, Barra da Tijuca, in the city and State of Rio de Janeiro.

PRESENCE: Messrs. Walmir Urbano Kesseli, Elias de Matos Brito and Heloisa Belotti Bedicks, regular members of the Company’s Fiscal Council (“CF”) attended the meeting, either in person or by means of audio or videoconference. Mrs. Fabiane Reschke, Secretary, also attended the meeting. It is also registered the presence of Mr. Nicandro Durante, Chairman of the Company’s Board of Directors.

AGENDA: (1) Presentation on the Tax, Regulatory, Civel and Labour contingencies; (2) Presentation on the Company’s Quarterly Information Report (“ITRs”) for the 3^rd quarter of 2025, dated as of September 30^th, 2025; and (3) Presentation by Ernst & Young Auditores Independentes S/S (“EY”) on the Company’s Quarterly Information Report (“ITRs”) for the 3^rd quarter of 2025, dated as of September 30^th, 2025.

CLARIFICATIONS AND RESOLUTIONS: Initially, it is noted that the meeting was held jointly with the Statutory Audit Committee (“CAE”) of the Company, during discussions on the items on the Agenda. Upon the review of the material presented and filed at the Company’s head office, and based on the information provided and discussions of the subjects included on the Agenda, the Fiscal Council members registered their considerations and discussions as follows:

(1) Presentation on the Tax, Regulatory, Civil and Labour contingencies.

Messrs. Gustavo Baptista Alves, Virginia A. Joazeiro Ribeiro, Carlos Eduardo Franco and Fabiane Reschke presented the data referring to the Company's tax, regulatory, civil and labour contingencies.

After the clarifications, the CF members thanked the information provided.

(2) Presentation on the Company’s Quarterly Information Report (“ITRs”) for the 3^rd quarter of 2025, dated as of September 30^th, 2025.

 

CONT. OF MINUTES OF THE FISCAL COUNCIL’S MEETING OF TIM S.A.

November 3^rd, 2025

Messrs. Andrea Viegas, Diretora Financeira (Chief Financial Officer), and Manoela Suassuna, representative of the Accounting, Reporting & Adm. Services area, presented the Company's Quarterly Information Report (“ITRs”) raised on September 30^th, 2025, based on the material presented, in which the points of greatest interest were highlighted.

After the clarifications, the CF members thanked the information provided.

(3) Presentation by Ernst & Young Auditores Independentes S/S (“EY”) on the Company’s Quarterly Information Report (“ITRs”) for the 3^rd quarter of 2025, dated as of September 30^th, 2025.

Initially, it is registered the presence of Messrs. Andrea Viegas, Diretora Financeira (Chief Financial Officer), and Manoela Suassuna, representative of the Accounting, Reporting & Adm. Services area.

Messrs. Beatriz Moraes and Bruno Bianchi, representatives of EY, presented (i) the work of the independent audit related to the ITRs for the 3^rd quarter of 2025, and (ii) the corresponding review report, noting that, in the course of the analysis, no irregularities were identified or any reservations recorded.

After the clarifications, the CF members thanked the information provided.

CLOSING: With no further issues to discuss, the meeting was adjourned, and these minutes drafted as summary, read, approved, and signed by all attendees CF Members.

I herein certify that these minutes are the faithful copy of the original version duly recorded in the respective corporate book.

Rio de Janeiro (RJ), November 3^rd, 2025.

FABIANE RESCHKE

Secretary

 

TIM S.A.

Publicly Held Company

CNPJ/MF 02.421.421/0001-11

NIRE 333.0032463-1

FISCAL COUNCIL’S OPINION

The Members of the Fiscal Council of TIM S.A. ("Company"), in the exercise of their attributions and legal duties, as provided in Article 163 of the Brazilian Corporate Law, conducted a review and analysis of the quarterly information, along with the limited review report of Ernst & Young Auditores Independentes S/S (“EY”), for the period that ended on September 30^th, 2025, and taking into account the information provided by the Company's management and the Independent Auditors, consider the information appropriate for presentation to the Board of Directors of the Company, in accordance to the Brazilian Corporate Law.

Rio de Janeiro, November 3^rd, 2025.

WALMIR URBANO KESSELI Chairman of the Fiscal Council Elias de Matos Brito Member of the Fiscal Council

HELOISA BELOTTI BEDICKS

Member of the Fiscal Council

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: November 3, 2025		By:	/s/ Alberto Mario Griselli
			Alberto Mario Griselli
			Chief Executive Officer, Chief Financial Officer and Investor Relations Officer

FAQ

What did TIMB disclose in this 6-K?

TIM S.A. reported its Fiscal Council reviewed the Q3 2025 ITR, received updates on contingencies, and heard EY’s limited review conclusions.

Which period does the ITR cover for TIMB?

The Quarterly Information Report covers the third quarter of 2025, dated as of September 30, 2025.

What were EY’s findings for TIMB’s Q3 2025 ITR?

Ernst & Young stated that no irregularities were identified and no reservations were recorded in its limited review.

What was the Fiscal Council’s opinion at TIMB?

The Fiscal Council considered the quarterly information appropriate for presentation to the Board of Directors, in line with Brazilian Corporate Law.

When did TIMB’s Fiscal Council meet?

The meeting was held on November 3, 2025 at the company’s head office in Rio de Janeiro.

Did the 6-K include any major transactions for TIMB?

No major transactions were described; the filing centers on reviews and opinions regarding the Q3 2025 ITR.

Who signed TIMB’s 6-K?

Alberto Mario Griselli signed as Chief Executive Officer, Chief Financial Officer and Investor Relations Officer.