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 – 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. 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.
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TIM S.A. |
Date:
October 8, 2025 |
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By: |
/s/ Alberto
Mario Griselli |
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|
Alberto
Mario Griselli |
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Chief
Executive Officer, Chief Financial Officer and Investor Relations Officer |