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COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP

For the period ended Mar 31, 2026. Filed May 8, 2026.

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What a company based outside the US has published at home or sent to its shareholders. It is how many foreign companies share results and news between annual reports.

Mar 31, 2026 · Filed May 8, 2026

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SBS$4.81+5.5%Stored close · as of Nov 6, 2026
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Contents

(b) Changes

Individual
December 31, 2025Net ChangeMarch 31, 2026
Deferred income tax assets
Provisions653,62811,723665,351
Pension plan obligations – G1125,200—125,200
Donations of underlying assets on concession agreements40,764(676)40,088
Allowance for doubtful accounts116,431(18,985)97,446
Allowance for losses on other accounts receivable54,426—54,426
Allowance for inventory losses121,5918,286129,877
Allowance for losses on works and projects10,554(10,554)—
Allowance for losses on write-off of assets46,790—46,790
Performance Agreements81,14349681,639
Present value adjustment (PVA) accounts receivable89,073(39,977)49,096
Derivative financial instruments in the profit/loss204,190210,915415,105
Deferred PIS/Cofins432,77710,771443,548
Other91,65712,465104,122
Off-set (*)(2,068,224)(184,464)(2,252,688)
Total deferred tax asset---
Deferred income tax liabilities
Temporary difference in the concession of intangible asset(290,128)2,753(287,375)
Capitalization of borrowing costs(526,275)(17,627)(543,902)
Profit on supply to government entities(573,921)(193)(574,114)
Financial asset of the concession(3,681,433)(116,446)(3,797,879)
Actuarial gain – G1 Plan(91,262)-(91,262)
Construction margin(35,113)683(34,430)
Off-set (*)2,068,224184,4642,252,688
Total deferred tax liabilities(3,129,908)53,634(3,076,274)

Companhia de Saneamento Básico do Estado de São Paulo – SABESP Notes to the Financial Statements for thePeriod ended March 31, 2026In thousands of reais, unless otherwise stated

Consolidated
December 31, 2025Net ChangeMarch 31, 2026
Deferred income tax assets
Provisions653,628125,513779,141
Pension plan obligations – G1125,200-125,200
Donations of underlying assets on concession agreements40,764(676)40,088
Allowance for doubtful accounts116,431(18,985)97,446
Allowance for losses on other accounts receivable54,426-54,426
Allowance for inventory losses121,5918,286129,877
Allowance for losses on works and projects10,554(10,554)-
Allowance for losses on write-off of assets46,790-46,790
Performance Agreements81,14349681,639
Present value adjustment (PVA) accounts receivable89,073(39,977)49,096
Derivative financial instruments in the profit/loss204,190210,915415,105
Deferred PIS/Cofins432,77710,771443,548
Actuarial gain/loss – Comprehensive Income-84,96984,969
Other91,65712,465104,122
Off-set (*)(2,068,224)(341,710)(2,409,934)
Total deferred tax asset-41,51341,513
Deferred income tax liabilities
Temporary difference in the concession of intangible asset(290,128)2,753(287,375)
Capitalization of borrowing costs(526,275)(17,627)(543,902)
Profit on supply to government entities(573,921)(39,507)(613,428)
Financial asset of the concession(3,681,433)(116,446)(3,797,879)
Actuarial gain – G1 Plan(91,262)—(91,262)
Construction margin(35,133)683(34,430)
Annual Generation Revenue (Receita Anual de Geração – RAG)-(10,300)(10,300)
Present value adjustment (PVA) investment property-(107,632)(107,632)
Off-set (*)2,068,224341,7102,409,934
Total deferred tax liabilities(3,129,908)53,634(3,076,274)

(*) Refers to the assets and liabilities offset in the determination of deferred tax. Historically, SABESP has recognized deferred tax liabilities, however, following the acquisition of EMAE and, consequently, the consolidation of its deferred tax asset, the Company presents the movements and offsets applied in order to reconcile deferred tax assets and deferred tax liabilities on an individual basis.

Companhia de Saneamento Básico do Estado de São Paulo – SABESP Notes to the Financial Statements for thePeriod ended March 31, 2026In thousands of reais, unless otherwise stated

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