TIM S.A. okays R$1B share buyback through 2028

Rhea-AI Filing Summary

TIM S.A. (TIMB) reports that its Board of Directors approved a new share repurchase program (Program 9) for common shares. Program 9 authorizes the acquisition of up to 55,187,638 common shares, equal to approximately 2.31% of total common shares, with a maximum aggregate amount of R$1 billion, to be held in treasury and subsequently cancelled, subject to legal and regulatory limits. The program runs until February 19, 2028. Management states that this reflects confidence in TIM’s fundamentals, cash generation and long-term value, and that current market prices do not fully reflect the Company’s intrinsic value. TIM also reports that the previous share repurchase program (Program 8), approved in February 2025, was terminated on August 12, 2026 after acquiring 46,884,500 common shares for approximately R$1 billion; 28,678,509 of those shares were cancelled on December 16, 2025, with the remaining shares held in treasury.

Positive

• New R$1 billion share repurchase authorization (Program 9) supports capital return and signals Management’s stated confidence in TIM’s long-term value and cash generation.
• Prior buyback (Program 8) deployed about R$1 billion, with 28,678,509 shares already cancelled, indicating active reduction of share count over time.

Negative

• None.

Key Figures

Program 9 maximum shares: 55,187,638 common shares Program 9 cap: R$1 billion Program 9 share percentage: 2.31% +4 more

7 metrics

Program 9 maximum shares 55,187,638 common shares Maximum number of common shares authorized for repurchase under Program 9

Program 9 cap R$1 billion Maximum aggregate amount for share repurchases under Program 9

Program 9 share percentage 2.31% Approximate percentage of total common shares that Program 9 covers

Program 9 end date February 19, 2028 Date through which Program 9 remains in effect

Program 8 shares acquired 46,884,500 common shares Total common shares repurchased under Program 8 before termination

Program 8 disbursements R$1 billion Approximate total cash disbursed for repurchases under Program 8

Program 8 shares cancelled 28,678,509 common shares Number of repurchased shares cancelled on December 16, 2025 under Program 8

Key Terms

share repurchase program, treasury, disciplined capital allocation, CVM Resolution No. 77/22, +1 more

5 terms

share repurchase program financial

"approved, on this date, a new share repurchase program for shares issued"

A share repurchase program is when a company buys back its own shares from the marketplace. This reduces the total number of shares available, which can increase the value of each remaining share and signal confidence in the company's prospects. For investors, it often suggests that the company believes its stock is undervalued or that it has extra cash to return to shareholders.

treasury financial

"to be held in treasury, subsequently cancelled, subject to the applicable"

The treasury is the department or area within a government or organization responsible for managing its money, finances, and financial strategies. It handles tasks like collecting revenue, paying bills, and planning for future financial needs, much like a household manages its budget. For investors, understanding the treasury is important because it influences interest rates, government spending, and overall economic stability.

disciplined capital allocation financial

"The Program also reinforces TIM’s commitment to disciplined capital allocation"

CVM Resolution No. 77/22 regulatory

"Program 9), pursuant to Article 22, V, of the Company’s Bylaws and CVM Resolution No. 77/22"

CVM Resolution No. 80/22 regulatory

"including those required under Annex G of CVM Resolution No. 80/22"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did TIMB announce about its new share repurchase program (Program 9)?

TIMB’s board approved Program 9, allowing repurchases of up to 55,187,638 common shares (about 2.31% of total common shares) with a maximum amount of R$1 billion, to be held in treasury and later cancelled.

How long will TIMB’s new share repurchase Program 9 remain in effect?

Program 9 remains in effect until February 19, 2028. During this period, TIMB may buy back up to 55,187,638 common shares within the program’s R$1 billion cap, subject to applicable legal and regulatory limits.

Why does TIMB’s management support the new share repurchase Program 9?

Management states the new program reflects confidence in TIMB’s fundamentals, strategy and long-term value, and believes the current share price does not adequately reflect its intrinsic value and sustainable cash generation capacity.

What were the results of TIMB’s previous share repurchase Program 8?

Under Program 8, TIMB acquired 46,884,500 common shares, with total disbursements of approximately R$1 billion. Of these, 28,678,509 shares were cancelled on December 16, 2025, and the remaining shares are held in treasury.

When did TIMB terminate its previous share repurchase Program 8?

TIMB terminated Program 8 on August 12, 2026. By that date, the company had repurchased 46,884,500 common shares, some of which were cancelled, with the balance retained as treasury shares for future corporate purposes.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/20/2026 - 06:01 AM EDT Accepted by SEC EDGAR 08/19/2026 - 05:47 PM EDT Learn about SEC filing dates

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: August 19, 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.

Publicly Held Company

CNPJ/MF No. 02.421.421/0001-11

NIRE No. 33.300.324.631

MATERIAL FACT

Approval of New Share Repurchase Program and

Results of the Previous Program

TIM S.A. (“Company” or “TIM”) (B3: TIMS3 and NYSE: TIMB), pursuant to Article 157 of Law No. 6,404/76 and CVM Resolution No. 44/21, hereby informs its shareholders, the market in general and other interested parties that its Board of Directors has approved, on this date, a new share repurchase program for shares issued by the Company (“Program 9”), pursuant to Article 22, V, of the Company’s Bylaws and CVM Resolution No. 77/22.

This decision reflects Management’s confidence in TIM’s fundamentals, strategy and long-term value creation potential. Management believes that the current market price of the Company’s shares does not adequately reflect TIM’s intrinsic value, the strength and resilience of its business model, its sustainable cash generation capacity and its growth prospects. Against this backdrop, the repurchase of TIM shares represents an efficient use of capital, consistent with Management’s view of the Company’s long-term value creation outlook.

The Program also reinforces TIM’s commitment to disciplined capital allocation, supported by its financial position, while preserving the Company’s ability to invest in its business and pursue additional opportunities to create value for shareholders.

Program 9 will allow for the acquisition of up to 55,187,638 common shares issued by the Company (corresponding to approximately 2.31% of the Company’s total common shares and representing a maximum amount of R$1 billion), to be held in treasury, subsequently cancelled, subject to the applicable legal and regulatory limits. The program will remain in effect until February 19, 2028. Further information and conditions relating to Program 9, including those required under Annex G of CVM Resolution No. 80/22, are available in the minutes of the Board of Directors’ meeting disclosed by the Company on the websites of CVM, B3 and Investor Relations.

Additionally, the Company hereby informs that the share repurchase program approved by the Board of Directors on February 12, 2025 (“Program 8”) was terminated on August 12, 2026. During its term, the Company acquired 46,884,500 common shares issued by the Company (representing approximately R$1 billion in total disbursements), of which 28,678,509 shares were cancelled on December 16, 2025. The remaining balance continues to be held in treasury and may be allocated as may be determined by the Company, in accordance with the rules of the Program 8 and the applicable regulations.

Rio de Janeiro, August 19, 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: August 19, 2026		By:	/s/ Alberto Mario Griselli
			Alberto Mario Griselli
			Chief Executive Officer