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~~July 1710, 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. CONSOLIDATED FORM Director and Related Party Transactions Group and Related Parties Security / Derivative Same Type / Class Total Shares 0,012389% 0,012389% Security / Derivative Security Description Deal Price Volume (R$) N/A Security / Derivative Same Type / Class Total Shares 0,012389% 0,012389% Group and Related Parties Security / Derivative Same Type / Class Total Shares 0,003907% 0,003907% Security / Derivative Security Description Deal Price Volume (R$) Shares Common Registered Compensation Plan Security / Derivative Same Type / Class Total Shares 0,002444% 0,002444% Group and Related Parties Security / Derivative Same Type / Class Total Shares 0,000000% 0,000000% Security / Derivative Security Description Deal Price Volume (R$) N/A - Security / Derivative Same Type / Class Total Shares 0,000000% 0,000000% Group and Related Parties Security / Derivative Same Type / Class Total Shares 0,000000% 0,000000% Security / Derivative Security Description Deal Price Volume (R$) N/A - Security / Derivative Same Type / Class Total Shares 0,000000% 0,000000% Group and Related Parties Security / Derivative Same Type / Class Total Shares 67,386500% 67,386500% Security / Derivative Security Description Deal Price Volume (R$) N/A - Security / Derivative Same Type / Class Total Shares 67,386500% 67,386500% Group and Related Parties Security / Derivative Same Type / Class Total Shares 0,000000% 0,000000% Security / Derivative Security Description Deal Price Volume (R$) N/A - Security / Derivative Same Type / Class Total Shares 0,000000% 0,000000% TIM S S.A. CONSOLIDATED FORM Common Registered 0 Activity in the month Intermediary Quantity N/A N/A Closing Balance % Share Security Description Quantity 0 Opening Balance % Share Security Description Quantity Common Registered 0 % Share Opening Balance ( ) Board of Directors ( ) Executive Management ( ) Fiscal Council ( ) Technical or Advisory Bodies ( ) Controlling Shareholder (X) People connected to the management Security Description Quantity Common Registered 1.611.969.909 Company Name: TIM S.A. Activity in the month Intermediary Quantity N/A 0 N/A % Share Security Description Quantity* Common Registered 1.611.969.909 Closing Balance Company Name: TIM S.A. ( ) Board of Directors ( ) Executive Management ( ) Fiscal Council ( ) Technical or Advisory Bodies (X) Controlling Shareholder ( ) People connected to the management Closing Balance % Share Security Description Quantity Common Registered 0 Opening Balance % Share Security Description Quantity Common Registered 0 Activity in the month Intermediary Quantity N/A 0 N/A Company Name: TIM S.A. ( ) Board of Directors ( ) Executive Management ( ) Fiscal Council (X) Technical or Advisory Bodies ( ) Controlling Shareholder ( ) People connected to the management Closing Balance % Share Security Description Quantity Common Registered 0 0 N/A ( ) People connected to the management Opening Balance % Share Security Description Quantity Common Registered 0 Activity in the month Intermediary Quantity N/A Security Description Quantity Common Registered 58.453 Company Name: TIM S.A. ( ) Board of Directors ( ) Executive Management (X) Fiscal Council ( ) Technical or Advisory Bodies ( ) Controlling Shareholder Closing Balance % Share Opening Balance Security Description Quantity Common Registered 93.453 Activity in the month N/A There were the following securities and derivatives operations, in accordance with CVM resolution 44/21 . Company Name: TIM S.A. (X) Board of Directors ( ) Executive Management ( ) Fiscal Council ( ) Technical or Advisory Bodies ( ) Controlling Shareholder ( ) People connected to the management Activity in the month Opening Balance % Share Security Description Quantity Common Registered 296.359 Intermediary Quantity N/A 0 N/A Intermediary Quantity N/A -35.000 Company Name: TIM S.A. ( ) Board of Directors (X) Executive Management ( ) Fiscal Council ( ) Technical or Advisory Bodies ( ) Controlling Shareholder ( ) People connected to the management Closing Balance % Share Security Description Quantity Common Registered 296.359 #Classificado como Uso Interno

Publicly-Held Company

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

Corporate Registry (NIRE): 33.300.324.631

NOTICE TO THE SHAREHOLDERS

PAYMENT OF INTEREST ON SHAREHOLDERS’ EQUITY

TIM S.A. (“TIM” or "Company") (B3: TIMS3; NYSE: TIMB), informs that its Board of Directors approved today, June 17, 2026, the distribution of R$ 400,000,000.00 (four hundred million reais) as Interest on Shareholders’ Equity.

The payment will be made by July 22nd, 2026, and June 22nd, 2026, is the date for identification of shareholders entitled to receive such values. Thus, the shares acquired after that date will be ex-Interest on Shareholders’ Equity rights.

1 – INTEREST ON SHAREHOLDERS’ EQUITY PER SHARE:

	Gross value per share	Total amount
Interest on Shareholders’ Equity	R$ 0.1674573219	R$ 400,000,000.00

The gross value per share is estimated and may be modified due to the variation in the number of treasury shares as a result of share buybacks carried out under the current program. In this case, the Company will issue a new Notice to the Shareholders informing the final value per share.

2 – WITHHOLDING TAX:

2.1. 17.5% of the Income Tax will be retained (Withholding Income Tax), for the occasion of the credit of Interest on Shareholders' Equity, except for shareholders who have differentiated taxation or who are exempt from taxation.

2.2. The shareholders mentioned above must prove this condition by June 22nd, 2026 by means of an exemption letter, which should be sent first to the electronic address – [email protected] – and, subsequently, the hard copy should be mailed to Banco Bradesco S/A – Cidade de Deus, s/n, Vila Yara – Osasco/SP – CEP: 06029-900 – Prédio Amarelo – Departamento de Ações e custódia – Escrituração de Ativos.

3 - FORMS OF PAYMENT (BOOK-ENTRY SHARES):

3.1. The Interest on Shareholders' Equity related to shares custody by CBLC (Companhia Brasileira de Liquidação e Custódia) will be paid by B3 S.A. - Brasil, Bolsa, Balcão, which will transfer to the shareholders through custody agents;

3.2. Credit on account indicated by the shareholder at Banco Bradesco S/A;

3.3. Payment of Interest on Shareholders' Equity by Banco Bradesco S/A branches, in the case of shareholders who do not meet the aforementioned conditions; and

3.4. Additional information may be obtained at any branches of Banco Bradesco S/A. or through the e-mail address informed on item 2.2.

Rio de Janeiro, June 17th, 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: June 17, 2026	By:	/s/ Alberto Mario Griselli
Date: July 10, 2026	By:	/s/ Alberto Mario Griselli
		Alberto Mario Griselli
		Chief Executive Officer

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