Insider holdings update at TIM S.A. (NYSE: TIMB) in Form 6-K

Rhea-AI Filing Summary

TIM S.A. filed a Form 6-K that provides a consolidated view of shareholdings and activity involving its directors, executive management, fiscal council, technical or advisory bodies, controlling shareholder and people connected to management. The disclosure focuses on common registered shares and is prepared in accordance with Brazilian securities regulator CVM Resolution 44/21.

The tables detail opening and closing share balances and activity in the month for each governance group, including cases where there were no positions or no movements. The report also consolidates the position of the controlling shareholder and related parties, giving a structured snapshot of how TIM S.A.’s equity is held across key insiders and related entities during the period covered.

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: October 8, 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. CONSOLIDATED FORM Director and Related Party Transactions Group and Related Parties Security / Derivative Same Type / Class Total Shares 0,021366% 0,021366% Security / Derivative Security Description Deal Price Volume (R$) N/A Security / Derivative Same Type / Class Total Shares 0,021366% 0,021366% Group and Related Parties Security / Derivative Same Type / Class Total Shares 0,016466% 0,016466% Security / Derivative Security Description Deal Price Volume (R$) Shares Common Registered Compensation Plan Security / Derivative Same Type / Class Total Shares 0,011786% 0,011786% 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 66,588193% 66,588193% Security / Derivative Security Description Deal Price Volume (R$) N/A - Security / Derivative Same Type / Class Total Shares 66,588193% 66,588193% Group and Related Parties Security / Derivative Same Type / Class Total Shares 0,000000% 0,000000% Security / Derivative Security Description Deal Price Volume (R$) N/A - Security / Derivative Same Type / Class Total Shares 0,000000% 0,000000% Intermediary Quantity N/A 0 N/A Intermediary Quantity N/A -113.291 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 517.217 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 517.217 Closing Balance % Share Opening Balance Security Description Quantity Common Registered 398.612 Activity in the month N/A Security Description Quantity Common Registered 285.321 Company Name: TIM S.A. ( ) Board of Directors ( ) Executive Management (X) Fiscal Council ( ) Technical or Advisory Bodies ( ) Controlling Shareholder 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 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 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 % 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 ( ) 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 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

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: October 8, 2025		By:	/s/ Alberto Mario Griselli
			Alberto Mario Griselli
			Chief Executive Officer, Chief Financial Officer and Investor Relations Officer

FAQ

What does TIMB's Form 6-K filing from TIM S.A. cover?

The Form 6-K from TIM S.A. consolidates information on shareholdings and activity in the month for directors, executive management, the fiscal council, technical or advisory bodies, the controlling shareholder and people connected to management, focusing on common registered shares.

Which types of securities are detailed in TIMB TIM S.A.'s Form 6-K?

The document focuses on common registered shares of TIM S.A., presenting quantities held and movements during the month for various governance groups and related parties.

Which governance bodies at TIM S.A. are included in the consolidated form?

The consolidated form includes positions for the Board of Directors, Executive Management, Fiscal Council, technical or advisory bodies, the controlling shareholder and people connected to the management, as applicable.

How does TIM S.A. address director and related party transactions in this filing?

The filing presents a consolidated form of director and related party transactions, listing opening balances, closing balances and activity in the month for each group, in line with Brazilian CVM Resolution 44/21.

What regulatory framework is referenced in TIMB's Form 6-K disclosure?

The consolidated information on securities and derivatives operations is prepared in accordance with CVM Resolution 44/21, which governs disclosure of such activities in Brazil.

Does the TIM S.A. Form 6-K include information about the controlling shareholder?

Yes. The consolidated form includes data for the controlling shareholder, showing its position in common registered shares alongside the positions of other governance groups and related parties.