Telefônica Brasil merges cybersecurity unit into TIS

Telefônica Brasil S.A. reports that its indirectly controlled company Telefônica Infraestrutura e Segurança Ltda.

Rhea-AI Filing Summary

Telefônica Brasil S.A. reports that its indirectly controlled company Telefônica Infraestrutura e Segurança Ltda. (TIS) has merged its wholly owned subsidiary Telefônica Cibersegurança e Tecnologia do Brasil Ltda. (Cyberco Brasil), effective July 1, 2026. Cyberco Brasil was dissolved and all of its assets, liabilities, rights, and obligations were transferred to TIS.

The company states that this corporate and operational reorganization is aimed at simplifying operating structures, reducing costs related to the activities of Cyberco Brasil and TIS, and capturing internal synergies. The merger was carried out at the book value of Cyberco Brasil’s net assets and did not change TIS’s share capital or Telefônica Brasil’s indirect equity interest in TIS.

Key Figures

Merger effective date: July 1, 2026

1 metrics

Merger effective date July 1, 2026 Date TIS merged Cyberco Brasil and succeeded to its assets and liabilities

Key Terms

corporate and operational reorganization, book value, net assets, wholly-owned subsidiary

4 terms

corporate and operational reorganization financial

"The Merger constitutes a corporate and operational reorganization aimed at generating administrative and economic benefits"

book value financial

"the Merger was concluded based on the book value of Cyberco Brasil’s net assets"

Book value is a company’s total assets minus its total liabilities as reported on the balance sheet; it represents the net accounting value that would remain for shareholders if the business sold its assets and paid off its debts. Investors use it as a benchmark to judge whether a stock looks cheap or pricey compared with that accounting baseline—like comparing a car’s resale “book” value to the price someone asks—and to assess firms with lots of tangible assets or potential liquidation value.

net assets financial

"the Merger was concluded based on the book value of Cyberco Brasil’s net assets"

Net assets represent the total value of what an organization owns minus what it owes. Think of it like a person’s belongings after paying off any debts—what remains is their net worth. For investors, net assets indicate the overall financial strength of a company or fund, showing how much value is available to shareholders.

wholly-owned subsidiary financial

"merged Telefônica Cibersegurança e Tecnologia do Brasil Ltda. (“Cyberco Brasil”), a wholly-owned subsidiary of TIS"

A wholly-owned subsidiary is a company whose entire ownership is held by another company, called the parent, so the parent controls all shares, board appointments and major decisions. For investors this matters because the subsidiary’s profits, losses, assets and liabilities are treated as part of the parent’s financial picture, affecting valuation and risk exposure — imagine a parent owning a single storefront outright and consolidating its receipts and bills into the parent’s books.

FAQ

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

What corporate action did Telefônica Brasil (VIV) disclose in this 6-K?

Telefônica Brasil disclosed that Telefônica Infraestrutura e Segurança Ltda. (TIS), indirectly controlled by the company, merged its wholly owned subsidiary Telefônica Cibersegurança e Tecnologia do Brasil Ltda. (Cyberco Brasil), dissolving Cyberco Brasil and transferring all its assets, liabilities, rights, and obligations to TIS.

What is the purpose of the Telefônica Brasil (VIV) merger between TIS and Cyberco Brasil?

The merger is described as a corporate and operational reorganization aimed at simplifying operating structures, reducing costs associated with Cyberco Brasil and TIS operations, and capturing internal synergies, seeking administrative and economic benefits within Telefônica Brasil’s infrastructure and security businesses.

Did the TIS and Cyberco Brasil merger change Telefônica Brasil (VIV) share capital or ownership?

No. Telefônica Brasil states the merger was based on the book value of Cyberco Brasil’s net assets and did not result in any change to TIS’s share capital or to the equity interest indirectly held in TIS by Telefônica Brasil, keeping ownership structure unchanged.

What happens to Cyberco Brasil after the Telefônica Brasil (VIV) merger?

Following the merger, Cyberco Brasil is dissolved. Telefônica Infraestrutura e Segurança Ltda. (TIS) succeeds to all of Cyberco Brasil’s assets, liabilities, rights, and obligations, consolidating these cybersecurity and technology activities under TIS within the Telefônica Brasil group.

When was the Telefônica Brasil (VIV) TIS–Cyberco Brasil merger completed?

Telefônica Brasil reports that the merger of Telefônica Infraestrutura e Segurança Ltda. (TIS) and its wholly owned subsidiary Cyberco Brasil was completed on July 1, 2026, with Cyberco Brasil’s net assets absorbed by TIS as of that date.

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

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Accepted by SEC EDGAR 07/01/2026 - 05:22 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

For the month of July, 2026

Commission File Number: 001-14475

TELEFÔNICA BRASIL S.A.
(Exact name of registrant as specified in its charter)

TELEFONICA BRAZIL S.A. (Translation of registrant’s name into English)

Av. Eng° Luís Carlos Berrini, 1376 -  28º andar
São Paulo, S.P.
Federative Republic of 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 X 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 X 

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 X 

 

TELEFÔNICA BRASIL S.A.

Publicly-held Company

Corporate Taxpayer’s ID (CNPJ/MF) 02.558.157/0001-62

Company Registry (NIRE) 35.3.001.5881-4

NOTICE TO THE MARKET

Telefônica Brasil S.A. (“Company” or “Telefônica”) (B3: VIVT3; NYSE: VIV) hereby informs its shareholders and the market in general that, on July 1, 2026, Telefônica Infraestrutura e Segurança Ltda. (“TIS”), indirectly controlled by the Company, merged Telefônica Cibersegurança e Tecnologia do Brasil Ltda. (“Cyberco Brasil”), a wholly-owned subsidiary of TIS, which was consequently dissolved (“Merger”).

The Merger constitutes a corporate and operational reorganization aimed at generating administrative and economic benefits through the simplification of operating structures, reduction of costs associated with the operations and activities carried out by Cyberco Brasil and TIS, and the capture of internal synergies. In addition, the Merger was concluded based on the book value of Cyberco Brasil’s net assets and did not result in any change to TIS’s share capital or to the equity interest indirectly held therein by the Company.

Finally, as a result of the Merger, TIS succeeds to all of Cyberco Brasil’s assets, liabilities, rights, and obligations.

São Paulo, July 1, 2026.

Rodrigo Rossi Monari

CFO and Investor Relations Officer

Telefônica Brasil – Investor Relations

Email: ir.br@telefonica.com

https://ri.telefonica.com.br/en/

SIGNATURE

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.

			TELEFÔNICA BRASIL S.A.
Date:	July 1, 2026		By:	/s/ João Pedro Carneiro
				Name:	João Pedro Carneiro
				Title:	Investor Relations Director