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Sabesp insider Tavares de Sousa Samanta I.S., the Investor Relations and Sustainability Officer, reported an open-market sale of 5,700 Common Shares at $28.61 per share on May 21, 2026. After this transaction, the officer directly holds 43 Common Shares.
Sabesp engineering officer Roberval Tavares de Sousa reported routine equity compensation activity involving restricted stock units and common shares. On May 1, 2026, he exercised RSUs to acquire 8,243 Common Shares, converting part of his derivative-based awards into direct share ownership.
To satisfy tax obligations, 2,267 Common Shares were withheld at $6.69 per share as a tax-withholding disposition, rather than an open-market sale. After these transactions, he directly held 5,976 Common Shares and 24,729 Restricted Stock Units. These RSUs stem from a prior grant of 32,965 units awarded on April 29, 2025, vesting in equal portions on May 1 of 2026, 2027, 2028 and 2029, contingent on his continued service as an officer.
COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP New Business & Projects Officer Rafael Costa Strauch reported compensation-related equity activity, not open-market trading. On May 1, 2026, he exercised 7,922 Restricted Stock Units (RSUs) into the same number of Common Shares at a stated price of $0.00 per share. To cover tax obligations, 2,179 Common Shares were disposed of through a tax-withholding transaction at $6.69 per share, leaving him with 5,743 Common Shares held directly. The RSUs come from a grant of 31,685 RSUs awarded on April 29, 2025, vesting in four equal annual installments through May 1, 2029, with 23,761 RSUs remaining after this vesting event.
COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP Chief Legal Officer Maria Alicia Lima Peralta reported routine equity compensation transactions. On May 1, 2026, she exercised 6,039 Restricted Stock Units into 6,039 Common Shares at a stated price of 0.00 per share.
To cover tax obligations, 1,661 Common Shares were disposed of in a tax-withholding transaction at 6.69 per share, leaving 4,378 Common Shares held directly after the disposition. Following the vesting, 18,122 Restricted Stock Units remain outstanding from a 24,142-unit grant awarded on April 29, 2025.
COMPANHIA DE SANEAMENTO BÁSICO DO ESTADO DE SÃO PAULO – SABESP regulatory and energy procurement officer Luciane Godinho Domingues exercised 10,317 restricted stock units into Common Shares on May 1, 2026. As part of this vesting event, 2,837 Common Shares were delivered back to the issuer to satisfy tax obligations, a tax-withholding disposition rather than an open-market sale.
Following these transactions, Domingues directly holds 7,480 Common Shares and 30,941 remaining restricted stock units. These RSUs come from a prior grant of 41,255 units awarded on April 29, 2025, which vest in four equal annual installments from May 1, 2026 through May 1, 2029, subject to continued service.
COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP Chief People Officer Josue Bressane Junior exercised 7,371 Restricted Stock Units into Common Shares. To cover tax obligations, 2,027 shares were delivered at $6.69 per share, leaving 5,344 Common Shares held directly. The transactions relate to a 29,486-unit RSU grant from April 29, 2025, of which 7,371 units vested on May 1, 2026 and 22,113 RSUs remain outstanding.
COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP Corporate Services Officer Gustavo Do Valle Fehlberg reported routine equity compensation activity involving restricted stock units and related tax withholding.
On May 1, 2026, 7,371 restricted stock units were exercised into 7,371 Common Shares at a conversion price of $0.00 per share. To cover tax obligations, 2,027 Common Shares were disposed of at $6.69 per share, a tax-withholding disposition rather than an open‑market sale. Following these transactions, he directly holds 5,344 Common Shares. The RSUs stem from a prior grant of 29,486 units on April 29, 2025, vesting in four equal annual installments, and 22,113 restricted stock units remain outstanding after this vesting event.
COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP Customer & Technology Officer Maciel Maia Denis reported routine equity compensation activity. He exercised 10,181 Restricted Stock Units into Common Shares and, in a related step, 2,800 Common Shares were disposed of to satisfy tax obligations at a price of $6.69 per share. After these transactions, he directly holds 7,381 Common Shares and 30,533 remaining Restricted Stock Units from a 40,715-unit grant awarded on April 29, 2025, which vests in four equal annual installments.
COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP operations and maintenance officer Debora Pierini Longo exercised 8,243 restricted stock units into Common Shares on May 1, 2026. To cover tax obligations, 2,267 Common Shares were withheld at $6.69 per share. After these transactions, she directly holds 5,976 Common Shares and 24,729 restricted stock units from a 32,965-unit grant awarded on April 29, 2025, which vests in equal portions on May 1 of 2026, 2027, 2028 and 2029.
COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP Chief Financial Officer Daniel Szlak reported routine equity compensation activity. On May 1, 2026, 10,181 restricted stock units vested and were converted into 10,181 Common Shares through a derivative exercise.
To cover tax obligations, 2,800 Common Shares valued at $6.69 per share were delivered back in a tax-withholding disposition, leaving Szlak with 7,381 Common Shares held directly after these transactions. The derivative position reflects a broader grant of 40,715 restricted stock units awarded on April 29, 2025, vesting in four equal annual installments through May 1, 2029.