Companhia de Saneamento Básico do Estado de São Paulo - SABESP
Companhia de Saneamento Básico do Estado de São Paulo - SABESP (SBS) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · SBS · as of Sep 30, 2025
Ownership Breakdown
219
Institutional Holders
▲ 18 vs Q2
$1.63B
Total Inst. Value
▲ $154.45M vs Q2
3.42B
Shares Outstanding
freeFloat 100.00%
65.82M
13F Shares Held
▼ 2.30M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
SBS largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
IMPAX ASSET MANAGEMENT GROUP PLC water supply | 8.20M | 1.20% | 1.20% | $203.34B | Nov 6, 2025 | ▼ 937.4K |
DEUTSCHE BANK AG\ water supply | 6.08M | 88.92% | 88.92% | $151.27B | Nov 13, 2025 | ▼ 1.22M |
AMUNDI water supply | 5.46M | 79.88% | 79.88% | $134.66B | Nov 14, 2025 | ▼ 418.4K |
BLACKROCK, INC. water supply | 3.51M | 51.28% | 51.28% | $87.24B | Nov 12, 2025 | ▼ 147.7K |
MANNING & NAPIER ADVISORS LLC water supply | 3.09M | 45.20% | 45.20% | $76.89B | Oct 27, 2025 | ▲ 2.52M |
LETKO, BROSSEAU & ASSOCIATES INC water supply | 2.25M | 32.89% | 32.89% | $55.95B | Nov 12, 2025 | ▼ 5.6K |
MACKENZIE FINANCIAL CORP water supply | 2.11M | 30.92% | 30.92% | $52.60B | Nov 13, 2025 | ▲ 14.5K |
VANGUARD GROUP INC water supply | 2.05M | 29.94% | 29.94% | $50.94B | Nov 7, 2025 | ▼ 30.6K |
CITIGROUP INC water supply | 2.05M | 29.94% | 29.94% | $50.93B | Nov 10, 2025 | ▼ 319.2K |
RENAISSANCE TECHNOLOGIES LLC water supply | 1.85M | 27.12% | 27.12% | $46.14B | Nov 13, 2025 | ▼ 73.2K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
19
Increased
+4.74M shares4
New Positions
first time holders26
Decreased
−8.42M shares0
Sold Out
fully exitedNet shares change (top 50)
3.69M
+4.74M / −8.42M
Net new holders
-3
4 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
SBS insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Tavares de Sousa Roberval Engineering Officer | May 25, 2026 | Sale | 5,900 | $28.81 | $170.0K | 76 | Form 4 ↗ |
Tavares de Sousa Samanta I.S. Inst. Rel. & Sustain. Officer | May 21, 2026 | Sale | 5,700 | $28.61 | $163.1K | 43 | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Companhia de Saneamento Básico do Estado de São Paulo - SABESP (SBS) is primarily owned by institutional investors, who hold approximately 1.9% of total shares outstanding. Company insiders own approximately 0.00%, while retail and public investors account for the remaining 98.07%.
The largest institutional shareholder of Companhia de Saneamento Básico do Estado de São Paulo - SABESP is IMPAX ASSET MANAGEMENT GROUP PLC, holding approximately 8.20 million shares — equal to 1.20% of outstanding shares — as of September 30, 2025.
A total of 219 institutional investors currently hold SBS stock, with a combined institutional value of approximately $1.63 billion as of the most recent 13F filing period.
Frequently asked questions
SBS ownershipCompanhia de Saneamento Básico do Estado de São Paulo - SABESP (SBS) is primarily owned by institutional investors, who hold approximately 1.9% of shares. The largest shareholder is IMPAX ASSET MANAGEMENT GROUP PLC with a 1.20% stake. Company insiders hold 0.00%. Data sourced from SEC Form 13F as of September 30, 2025.