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Companhia De Saneamento Basico Do Estado De Sao Paulo-Sabesp (SBS)

Companhia De Saneamento Basico Do Estado De Sao Paulo-Sabesp on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders and insider trades. Listed on NYSE, classified by the SEC as water supply.

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13.1M

Short interest

settlement 2026-09-30

1.9

Days to cover

+0.5 days vs prior

58.6%

Short share of volume

2026-10-09

9

Fails to deliver

settlement 2026-09-14

$0

Insider flow, 90 days

0 buys, 0 sells

As of 2026-10-09.

Short interest

FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSON

As of 30 September 2026, short interest in SBS is 13,125,732 shares, down 4,224,921 shares over the last month. Over the last 48 readings it ranged from 1,940,905 shares (15 January 2026) to 25,870,594 shares (30 June 2026). At the reported average volume of 6.7M shares a day that is 1.9 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-09-3013,125,732-4.8%6,746,0881.95
2026-09-1513,788,023-20.5%9,224,0191.49
2026-08-3117,350,653-4.6%11,662,4011.49
2026-08-1418,194,005-24.7%9,247,2051.97
2026-07-3124,149,215+66.4%6,203,9073.89
2026-07-1514,515,329-43.9%4,998,7832.90
2026-06-3025,870,594+28.3%7,960,8573.25
2026-06-1520,166,195+46.6%7,269,6302.77
2026-05-2913,755,555-5.8%4,969,4462.77
2026-05-1514,602,841+413.4%5,520,2432.65
2026-04-302,844,497+6.9%1,593,3251.79
2026-04-152,661,269-4.0%1,177,1832.26
2026-03-312,771,980-10.6%1,583,7111.75
2026-03-133,099,566-7.6%1,795,6691.73
2026-02-273,354,612-14.5%937,8033.58
2026-02-133,923,669+2.9%1,403,4932.80
2026-01-303,813,814+96.5%1,430,5302.67
2026-01-151,940,905-25.2%1,195,8231.62
2025-12-312,594,849+11.4%1,134,5962.29
2025-12-152,329,474-14.6%1,196,2241.95
2025-11-282,726,957+30.4%875,6783.11
2025-11-142,091,756-33.0%1,254,3451.67
2025-10-313,120,434+0.8%874,4643.57
2025-10-153,096,829+9.2%848,0973.65

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 9 October 2026, the short share of SBS volume is 58.6%, up 17.6 points over the last five sessions. Over the last 30 readings it ranged from 33.8% (7 October 2026) to 88.4% (2 September 2026). The latest reading is 4.8 points below the 30-session average of 63.4%, on 4.0M shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-10-092.4M4.0M58.6%0
2026-10-082.6M7.4M35.4%11
2026-10-072.1M6.2M33.8%48,237
2026-10-062.3M3.9M60.8%535
2026-10-056.0M10.5M57.3%3,749
2026-10-021.3M3.2M41.0%2,250
2026-10-011.0M1.9M54.4%11
2026-09-301.2M2.0M58.5%12
2026-09-291.2M2.5M47.9%3,300
2026-09-281.3M1.9M67.5%1,228
2026-09-25874K1.4M64.1%1,232
2026-09-241.5M2.1M69.0%658
2026-09-231.7M2.7M61.2%8,960
2026-09-221.9M3.9M49.2%2,602
2026-09-211.2M1.7M68.0%0
2026-09-181.1M1.4M74.1%0
2026-09-171.3M1.8M69.5%0
2026-09-161.7M2.5M66.3%575
2026-09-151.4M2.1M64.0%0
2026-09-141.9M2.8M69.2%0
2026-09-111.5M2.1M71.4%0
2026-09-101.5M2.0M73.2%7,200
2026-09-091.1M1.5M73.5%0
2026-09-081.5M2.5M61.5%212
2026-09-041.7M2.5M66.2%1
2026-09-032.1M2.7M77.8%8,000
2026-09-029.1M10.3M88.4%0
2026-09-013.3M4.4M74.3%36
2026-08-312.6M4.3M60.5%169
2026-08-2810.9M12.7M86.1%400

Fails to deliver

SEC, the last 30 settlement dates with a fail. JSON

As of 14 September 2026, the fails-to-deliver balance in SBS is 9 shares, down 27,514 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (24 July 2026) to 1,775,950 shares (14 August 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-09-149$5.29$48
2026-08-2827,523$4.82$133K
2026-08-273,466$4.85$17K
2026-08-2669,120$4.80$332K
2026-08-2592,574$4.63$429K
2026-08-141,775,950$4.68$8.3M
2026-08-1232,318$5.03$163K
2026-08-07161,976$5.37$870K
2026-08-063$5.43$16
2026-08-0514,152$5.43$77K
2026-08-0417,027$5.43$92K
2026-07-303,106$5.26$16K
2026-07-2928$5.52$155
2026-07-2828$5.68$159
2026-07-241$5.73$6
2026-07-20530$5.75$3K
2026-07-1726,481$5.79$153K
2026-07-1615,612$5.92$92K
2026-07-1311,630$6.06$70K
2026-07-1010,098$5.84$59K
2026-07-0984,825$5.70$484K
2026-07-07204,635$5.81$1.2M
2026-07-022,166$5.75$12K
2026-07-0115,421$5.78$89K
2026-06-30522,459$5.81$3.0M
2026-06-2943,379$5.79$251K
2026-06-2547,849$5.53$265K
2026-06-23195,152$5.42$1.1M
2026-06-229,444$5.25$50K
2026-06-18103,340$5.38$556K

Insider trades

SEC Form 4, newest first. JSON

No open-market insider trades were reported for SBS in the last 90 days. The most recent filings are listed below. Latest filing: Szlak Daniel (Chief Financial Officer) on 2026-06-15.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-06-15Szlak DanielChief Financial OfficerSell81$28.30$2K0
2026-06-15Szlak DanielChief Financial OfficerSell7K$28.30$207K0
2026-06-15Szlak DanielChief Financial OfficerSell81$5.58$4520
2026-06-15Szlak DanielChief Financial OfficerSell7K$5.59$41K81
2026-05-25Tavares de Sousa RobervalEngineering OfficerSell6K$5.74$34K76
2026-05-25Tavares de Sousa RobervalEngineering OfficerSell6K$28.81$170K76
2026-05-21Tavares de Sousa Samanta I.S.Inst. Rel. & Sustain. OfficerSell6K$5.72$33K43
2026-05-21Tavares de Sousa Samanta I.S.Inst. Rel. & Sustain. OfficerSell6K$28.61$163K43
2026-05-01Leone Piani Carlos AugustoCEOOption exercise50Kprice not stated in the filingnot stated65K
2026-05-01Leone Piani Carlos AugustoCEOTax withholding14K$6.69$93K36K
2026-05-01Szlak DanielChief Financial OfficerTax withholding3K$6.69$19K7K
2026-05-01Szlak DanielChief Financial OfficerOption exercise10Kprice not stated in the filingnot stated10K
2026-05-01Pierini Longo DeboraOperations & Maint. OfficerOption exercise8Kprice not stated in the filingnot stated8K
2026-05-01Pierini Longo DeboraOperations & Maint. OfficerTax withholding2K$6.69$15K6K
2026-05-01Maciel Maia DenisCustomer & Technology OfficerOption exercise10Kprice not stated in the filingnot stated10K
2026-05-01Maciel Maia DenisCustomer & Technology OfficerTax withholding3K$6.69$19K7K
2026-05-01Do Valle Fehlberg GustavoCorporate Services OfficerTax withholding2K$6.69$14K5K
2026-05-01Do Valle Fehlberg GustavoCorporate Services OfficerOption exercise7Kprice not stated in the filingnot stated7K
2026-05-01Bressane Junior JosueChief People OfficerTax withholding2K$6.69$14K5K
2026-05-01Bressane Junior JosueChief People OfficerOption exercise7Kprice not stated in the filingnot stated7K
2026-05-01Godinho Domingues LucianeReg. & Energy Proc. OfficerOption exercise10Kprice not stated in the filingnot stated10K
2026-05-01Godinho Domingues LucianeReg. & Energy Proc. OfficerTax withholding3K$6.69$19K7K
2026-05-01Costa Strauch RafaelNew Bus. & Projects OfficerOption exercise8Kprice not stated in the filingnot stated8K
2026-05-01Costa Strauch RafaelNew Bus. & Projects OfficerTax withholding2K$6.69$15K6K
2026-05-01Tavares de Sousa RobervalEngineering OfficerTax withholding2K$6.69$15K6K
2026-05-01Tavares de Sousa RobervalEngineering OfficerOption exercise8Kprice not stated in the filingnot stated8K

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.

Large holders (13D and 13G)

One row per reporting person with its latest filing, newest first. JSON

1 holder reports 5% or more of SBS in its latest filing, on Schedule 13G (passive). The holder is BlackRock, Inc. at 7.8% of the class (55,121,116 shares), filed 2026-04-24 for an event on 2026-03-31.

FiledFormHolderSharesOf classEvent
2026-04-2413G/Ano. 2BlackRock, Inc.parent holding company55.1M7.8%2026-03-31

13F holders

Tracked managers holding SBS at their latest 13F. JSON

5 of the 30 tracked managers held SBS at their latest 13F, $48.0M in total at quarter-end prices. Renaissance Technologies is the largest at $43.6M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 4 added shares and 1 cut.

FundQuarterSharesValueOf portfolioChange in shares
Renaissance Technologies2026-06-307.5M$43.6M0.06%+5.8M
Citadel Advisors2026-06-30521K$3.0M0.00%+277K
AQR Capital Management2026-06-30185K$1.1M0.00%+152K
Millennium Management2026-06-3024K$136K0.00%-94K
Two Sigma Investments2026-06-3020K$118K0.00%new

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

What this page is

Companhia De Saneamento Basico Do Estado De Sao Paulo-Sabesp in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.

This page follows Companhia De Saneamento Basico Do Estado De Sao Paulo-Sabesp (SBS), SEC CIK 1170858, listed on NYSE, classified by the SEC as water supply. The cross-market tables live on the short interest and insider transactions hubs.

Source and updates

Short interest
FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-09-30.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-09.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-14.JSON and CSV
Large holders
SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-04-24.JSON and CSV
13F holders
SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Insider trades
SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-06-15.JSON and CSV
Company record
EDGAR filing index for CIK 1170858Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits
10 requests a minute without a key, 30 with a free key from a free account.

How to read it

  • Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
  • Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
  • Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Other companies the SEC classifies as water supply

Other company pages

Datasets

Frequently Asked Questions

How much of SBS is sold short?
13,125,732 shares were held short at the 2026-09-30 settlement, 1.9 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is SBS's daily short volume?
On 2026-10-09, 2,357,339 of the 4,023,668 SBS shares reported to FINRA were sold short, 58.6% of the day's reported volume. Short volume is a flow for one day, not a position.
Does SBS have fails to deliver?
The SEC's latest file shows 9 SBS shares failed to deliver at settlement 2026-09-14. Fails are reported per settlement date and published twice a month with a lag.
Are SBS insiders buying or selling?
No open-market insider trades were reported for SBS in the last 90 days. The most recent filings are listed below. Latest filing: Szlak Daniel (Chief Financial Officer) on 2026-06-15.
Who owns 5% or more of SBS?
1 holder reports 5% or more of SBS in its latest filing, on Schedule 13G (passive). The holder is BlackRock, Inc. at 7.8% of the class (55,121,116 shares), filed 2026-04-24 for an event on 2026-03-31.
Which tracked 13F managers own SBS?
5 of the 30 tracked 13F managers held SBS shares at their latest filing, $48.0M in all. The largest: Renaissance Technologies (7.5M shares, $43.6M), Ken Griffin's Citadel Advisors (521K shares, $3.0M), Cliff Asness's AQR Capital Management (185K shares, $1.1M), Izzy Englander's Millennium Management (24K shares, $136K), Two Sigma Investments (20K shares, $118K).

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.