Form 6-K TIM S.A. For: Jun 30
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: June 26, 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 – 12th 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 BOARD OF DIRECTORS’ MEETING
HELD ON JUNE 26TH, 2025
DATE, TIME AND PLACE: June 26th, 2025, at 8.30 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: The Board of Directors’ Meeting of the Company was held at the date, time and place mentioned above, with the presence of Messrs. Nicandro Durante, Adrian Calaza, Alberto Mario Griselli, Alessandra Michelini, Claudio Giovanni Ezio Ongaro, Gesner José de Oliveira Filho, Gigliola Bonino, Herculano Aníbal Alves and Leonardo de Carvalho Capdeville, either in person or by means of audio or videoconference, as provided in the 2nd paragraph of Section 25, of the Company’s By-laws. Justified absence of Mrs. Flavia Maria Bittencourt.
BOARD: Mr. Nicandro Durante – Chairman; and Mrs. Fabiane Reschke – Secretary.
AGENDA: To discuss and resolve on the Company's vote at the Closed Hearing No. 01/2025 – DIE promoted by B3 S.A. – Brasil, Bolsa, Balcão ("B3") regarding the amendment of the Novo Mercado Regulations ("Regulations" and "Closed Hearing").
RESOLUTIONS: 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 subject included on the Agenda, the Board Members, unanimously by those present and with the abstention of the legally restricted, decided to register the discussions as follows:
Acknowledged the Proposed Amendment of the Novo Mercado Regulations and, after the presentation of the main points submitted by B3 to the Closed Hearing, as well as an analysis of the impact of each of the 25 (twenty-five) proposed amendments, approved the Company's vote: (i) in favor of proposals Nos. 1, 2, 4, 5, 6, 7, 8, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22 and 23; and (ii) against proposals Nos. 3, 9, 10, 16, 24 and 25.
Finally, the Investor Relations Officer or any other representative indicated by him was authorized to take all the necessary steps to formalize the Company's vote at the Closed Hearing promoted by B3.

CLOSING: With no further issues to discuss, the meeting was adjourned, and these minutes drafted as summary, read, approved and signed by all attendees Board 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), June 26th, 2025.
FABIANE RESCHKE
Secretary
2
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: June 26, 2025 | By: | /s/ Alberto Mario Griselli | |
| Alberto Mario Griselli | |||
| Chief Executive Officer, Chief Financial Officer and Investor Relations Officer | |||
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