As of the latest Form 4 filed Jun 16, 2026.
What Companhia de Saneamento Basico do Estado de Sao Paulo SABESP ADR insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 24 most recent filings for SBS.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-06-16 | 2026-06-15 | Szlak Daniel Chief Financial Officer | SSale | −81.00 | $28.30 | $2.29K | No | Form 4 ↗ |
| 2026-06-16 | 2026-06-15 | Szlak Daniel, Chief Financial Officer | SSale | −7.30K | $28.30 | $207K | No | Form 4 ↗ |
| 2026-05-29 | 2026-05-25 | Tavares de Sousa Roberval Engineering Officer | SSale | −5.90K | $28.81 | $170K | No | Form 4 ↗ |
| 2026-05-27 | 2026-05-21 | Tavares de Sousa Samanta I.S. Inst. Rel. & Sustain. Officer | SSale | −5.70K | $28.61 | $163K | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Tavares de Sousa Roberval Engineering Officer | FTax | −2.27K | $6.69 | $15.2K | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Tavares de Sousa Roberval, Engineering Officer | MExercise | +8.24K | — | — | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Costa Strauch Rafael New Bus. & Projects Officer | FTax | −2.18K | $6.69 | $14.6K | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Costa Strauch Rafael, New Bus. & Projects Officer | MExercise | +7.92K | — | — | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Lima Peralta Maria Alicia Chief Legal Officer | FTax | −1.66K | $6.69 | $11.1K | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Lima Peralta Maria Alicia, Chief Legal Officer | MExercise | +6.04K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Godinho Domingues Luciane Reg. & Energy Proc. Officer | FTax | −2.84K | $6.69 | $19.0K | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Godinho Domingues Luciane, Reg. & Energy Proc. Officer | MExercise | +10.3K | — | — | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Bressane Junior Josue Chief People Officer | FTax | −2.03K | $6.69 | $13.6K | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Bressane Junior Josue, Chief People Officer | MExercise | +7.37K | — | — | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Do Valle Fehlberg Gustavo Corporate Services Officer | FTax | −2.03K | $6.69 | $13.6K | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Do Valle Fehlberg Gustavo, Corporate Services Officer | MExercise | +7.37K | — | — | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Maciel Maia Denis Customer & Technology Officer | FTax | −2.80K | $6.69 | $18.7K | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Maciel Maia Denis, Customer & Technology Officer | MExercise | +10.2K | — | — | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Pierini Longo Debora Operations & Maint. Officer | FTax | −2.27K | $6.69 | $15.2K | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Pierini Longo Debora, Operations & Maint. Officer | MExercise | +8.24K | — | — | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Szlak Daniel Chief Financial Officer | FTax | −2.80K | $6.69 | $18.7K | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Szlak Daniel, Chief Financial Officer | MExercise | +10.2K | — | — | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Leone Piani Carlos Augusto CEO | FTax | −13.8K | $6.69 | $92.5K | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-01 | Leone Piani Carlos Augusto, CEO | MExercise | +50.3K | — | — | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also SBS’s full analysis or the market-wide insider trading feed. The tabs above jump to SBS’s other SEC data.
Source: SEC Form 4 filings for SBS, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.