Telefonica Brasil

DIVIDENDS AND INTEREST ON EQUITY 31 19.

SEC original ↗Telefonica Brasil — Earnings release (6-K report)6-KMay 21, 2026

b 214,331 94,989 227,904 130,866 Taxes, charges and contributions payable 17 1,535,160 1,467,678 1,591,560 1,516,170 Dividends and interest on equity 18.

SEC original ↗Telefonica Brasil — Earnings release (6-K report)6-KMay 21, 2026

CASH AND CASH EQUIVALENTS Company Consolidated 03.31.2026 12.31.2025 03.31.2026 12.31.2025 Short-term investments (1) 8,541,557 6,460,418 9,000,221 6,945,770 Cash and banks (2) 54,156 78,523 62,869 86,569 Total 8,595,713 6,538,941 9,063,090 7,032,339 (1) Highly liquid short-term investments basically Bank Deposit Certificates ("CDB") and Repurchase Agreements with top tier financial institutions, linked to the Interbank Deposit Certificate ("CDI") rate, with original maturities of up to three months, and with immaterial risk of change in value.

SEC original ↗Telefonica Brasil — Earnings release (6-K report)6-KMay 21, 2026

ANATEL, the regulatory national body for the telecommunications sector, regulates, among other the: sector policies and regulations; licensing; fees and tariffs; competitive aspects, including the expansion of the Company'Business through the acquisition of other telecommunications companies; service, technical and quality standards; consumer rights; and penalties and other sanctions related to interconnection and agreements.

SEC original ↗Telefonica Brasil — Earnings release (6-K report)6-KMay 21, 2026

Considering that: (i) all decisions are made based on consolidated reports; (ii) the mission of the Company and its subsidiaries is to provide its customers with quality telecommunications services; and (iii) all decisions relating to strategic, financial planning, purchasing, investments and application of resources are made on a consolidated basis, Management's conclusion is that the Company and its subsidiaries operate in a single operating segment providing services telecommunications.

SEC original ↗Telefonica Brasil — Earnings release (6-K report)6-KMay 21, 2026

ANATEL, the regulatory national body for the telecommunications sector, regulates, among other the: sector policies and regulations; licensing; fees and tariffs; competitive aspects, including the expansion of the Company'Business through the acquisition of other telecommunications companies; service, technical and quality standards; consumer rights; and penalties and other sanctions related to interconnection and agreements.

SEC original ↗Telefonica Brasil — Earnings release (6-K report)6-KMay 21, 2026

The interconnection tariffs, form the basis of the Company's revenue and costs and are charged between telecommunications service providers to allow and remunerate the interconnected use of their networks.

SEC original ↗Telefonica Brasil — Earnings release (6-K report)6-KMay 21, 2026

Changes to the regulations over interconnection tariffs may reduce tariff revenues or costs or charge affecting the Company's business, financial condition, revenues, operating results, and prospects.

SEC original ↗Telefonica Brasil — Earnings release (6-K report)6-KMay 21, 2026

Therefore, the Company's business, operating results, revenues and financial conditions could be negatively affected the regulatory authorities, including, new or more stringent operational and/or service requirements; granting of operating licenses; limitations on interconnection tariffs; sanctions for failures to comply with regulatory obligations; delays in granting, or lack of approvals for tariff increases; and antitrust limitations imposed by ANATEL and CADE.

SEC original ↗Telefonica Brasil — Earnings release (6-K report)6-KMay 21, 2026

227/2026 was approved, which, among other topics, creates the IBS management committee, to regulates tax litigation, and establishes rules for the administration of the new taxes.

SEC original ↗Telefonica Brasil — Earnings release (6-K report)6-KMay 21, 2026

FINANCIAL INVESTMENTS Company Consolidated 03.31.2026 12.31.2025 03.31.2026 12.31.2025 Guarantee deposits for legal proceedings (1) 32,972 40,934 33,394 41,308 Treasury Bills - LFT (2) — — 88,748 99,102 Sudene tax incentives (3) 34,407 — 34,407 — Total non-current 67,379 40,934 156,549 140,410 Current — — 88,748 99,102 Non-current 67,379 40,934 67,801 41,308 (1) These refer to financial investments in guarantees for legal proceedings (notes 19 and 33).

SEC original ↗Telefonica Brasil — Earnings release (6-K report)6-KMay 21, 2026