Insider and controlling shareholder stakes at TIM S.A. (NYSE: TIMB)

Rhea-AI Filing Summary

TIM S.A. reports consolidated information on securities holdings and transactions by its board of directors, executive management, fiscal council, advisory bodies, controlling shareholder and related parties, in accordance with CVM Resolution 44/21.

The controlling shareholder section lists a holding of 67.386500% of common registered shares, corresponding to 1,611,969,909 shares. Individual directors and related parties show very small ownership percentages, such as 0.021617%, 0.012389% and 0.011928%, including positions linked to a compensation plan.

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 10, 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 0,021617% 0,021617% Security / Derivative Security Description Deal Price Volume (R$) N/A Security / Derivative Same Type / Class Total Shares 0,012389% 0,012389% Group and Related Parties Security / Derivative Same Type / Class Total Shares 0,011928% 0,011928% Security / Derivative Security Description Deal Price Volume (R$) Shares Common Registered Compensation Plan Security / Derivative Same Type / Class Total Shares 0,004842% 0,004842% 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% Intermediary Quantity N/A -220.758 N/A Intermediary Quantity N/A -169.500 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 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 517.117 Closing Balance % Share Opening Balance Security Description Quantity Common Registered 285.321 Activity in the month N/A Security Description Quantity Common Registered 115.821 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 #Classificado como Uso Interno

 

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 10, 2026		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 report about insider and related-party holdings?

The Form 6-K from TIM S.A. (TIMB) consolidates securities holdings and transactions by directors, executives, fiscal council, advisory bodies, the controlling shareholder and related parties, in line with CVM Resolution 44/21, giving investors visibility into current positions in common registered shares.

How much of TIMB’s common shares does the controlling shareholder hold?

The controlling shareholder section shows a holding of 67.386500% of TIM S.A.’s common registered shares, with a disclosed quantity of 1,611,969,909 shares, highlighting the high level of ownership concentration in a single shareholder group.

What ownership levels are reported for TIMB’s directors and related parties?

Directors and related parties at TIM S.A. report relatively small stakes in common registered shares, with disclosed percentages such as 0.021617%, 0.012389% and 0.011928%, including positions associated with a registered compensation plan during the period covered.

How many common registered shares are referenced in TIMB’s consolidated form?

The consolidated form references 1,611,969,909 common registered shares associated with the controlling shareholder section. This figure illustrates the scale of the controlling position relative to the company’s common equity structure disclosed in the report.

Which Brazilian rule governs TIMB’s disclosure of these securities positions?

TIM S.A. states that its reported securities and derivatives operations comply with CVM Resolution 44/21, a Brazilian securities regulator rule that governs disclosure of trading and holdings by management, controlling shareholders and related parties in listed companies.

Who signed TIMB’s Form 6-K covering these consolidated holdings?

The Form 6-K was signed on behalf of TIM S.A. by Alberto Mario Griselli, who serves as Chief Executive Officer, Chief Financial Officer and Investor Relations Officer, confirming executive responsibility for the accuracy of the disclosed consolidated securities information.