Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in SBS held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Impax Asset Management Group plc | 52.3M | $302.4M | +676.1% | 1.531% | 1.97% |
| 2 | BlackRock, Inc. | 29.9M | $173.1M | +391.5% | 0.876% | 0.00% |
| 3 | Amundi | 26.1M | $150.9M | +397.2% | 0.764% | 0.04% |
| 4 | ROYAL LONDON ASSET MANAGEMENT LTD | 20.6M | $118.8M | +673.7% | 0.601% | 0.22% |
| 5 | DEUTSCHE BANK AG\ | 19.2M | $110.9M | +418.3% | 0.562% | 0.03% |
| 6 | WCM INVESTMENT MANAGEMENT, LLC | 15.9M | $92.5M | +623.8% | 0.466% | 0.17% |
| 7 | WELLINGTON MANAGEMENT GROUP LLP | 12.3M | $71.0M | +496.6% | 0.359% | 0.01% |
| 8 | LETKO, BROSSEAU & ASSOCIATES INC | 12.1M | $70.0M | +415.8% | 0.354% | 1.03% |
| 9 | UBS Group AG | 12.0M | $69.6M | +740.2% | 0.352% | 0.01% |
| 10 | MACKENZIE FINANCIAL CORP | 11.0M | $63.8M | +409.1% | 0.323% | 0.06% |
| 11 | MORGAN STANLEY | 9.9M | $57.0M | +424.4% | 0.288% | 0.00% |
| 12 | VANGUARD CAPITAL MANAGEMENT LLC | 9.4M | $54.3M | +400.0% | 0.275% | 0.00% |
| 13 | AMERICAN CENTURY COMPANIES INC | 8.5M | $49.3M | +393.6% | 0.249% | 0.02% |
| 14 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME | 7.9M | $45.4M | +396.7% | 0.230% | 0.01% |
| 15 | RENAISSANCE TECHNOLOGIES LLC | 7.5M | $43.6M | +336.1% | 0.221% | 0.06% |
| 16 | NORTHERN TRUST CORP | 7.4M | $42.7M | +360.3% | 0.216% | 0.00% |
| 17 | DUFF & PHELPS INVESTMENT MANAGEMENT CO | 6.4M | $37.0M | +342.3% | 0.187% | 0.17% |
| 18 | Perpetual Ltd | 6.3M | $36.6M | +400.2% | 0.185% | 0.52% |
| 19 | ASSETMARK, INC | 6.1M | $35.1M | +456.2% | 0.178% | 0.06% |
| 20 | ALLIANCEBERNSTEIN L.P. | 1.1M | $34.3M | +173.0% | 0.033% | 0.01% |
| 21 | STRS OHIO | 5.7M | $33.0M | +364.2% | 0.167% | 0.12% |
| 22 | Legal & General Group Plc | 5.1M | $29.3M | +415.9% | 0.148% | 0.01% |
| 23 | Allianz Asset Management GmbH | 4.7M | $27.1M | +391.5% | 0.137% | 0.01% |
| 24 | Itau Unibanco Holding S.A. | 4.4M | $25.0M | +591.9% | 0.128% | 0.48% |
| 25 | FIRST TRUST ADVISORS LP | 4.1M | $23.6M | +392.1% | 0.120% | 0.01% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in SBS — a direct measure of their conviction.
Filings activity in SBS during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 297 | +23% | 11.07% | +0.74 pp | $2.19B | +1.7% |
| Q1 2026 | 242 | +9.0% | 10.33% | +0.49 pp | $2.15B | +34% |
| Q4 2025 | 222 | +4.2% | 9.84% | +0.44 pp | $1.60B | +0.2% |
| Q3 2025 | 213 | +7.6% | 9.40% | 2.32 pp | $1.60B | 9.0% |
| Q2 2025 | 198 | +2.6% | 11.72% | 9.27 pp | $1.76B | 31% |
| Q1 2025 | 193 | +5.5% | 20.99% | +11.32 pp | $2.56B | +170% |
| Q4 2024 | 183 | 1.6% | 9.67% | +0.06 pp | $948M | 13% |
| Q3 2024 | 186 | — | 9.61% | — | $1.09B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying SBS stock.
Based on Q2 2026 13F filings, institutional ownership of Companhia de Saneamento Básico do Estado de São Paulo - SABESP stands at 11.1%, held across 297 reporting institutions.
Impax Asset Management Group plc is the largest reported institutional holder of SBS, with approximately 52,324,409 shares worth $0.30B as of Q2 2026.
Yes — 1 widely-followed marquee investor appear among the top 25 institutional holders of SBS, including RENAISSANCE TECHNOLOGIES LLC.
Our composite Smart Money Score for SBS is 67 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
78 institutions opened new positions in SBS during Q2 2026, while 24 fully exited. 49 added to existing positions and 160 trimmed.
SBS institutional ownership rose by 0.74 percentage points quarter-over-quarter, with a net change of +55 holders.
The top 10 institutions account for 55.9% of all reported 13F value in SBS, and the top 25 account for 82.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Companhia de Saneamento Básico do Estado de São Paulo - SABESP (SBS) Institutional Ownership