BlackRock (SBS) holds 55.12M shares, 7.8% stake in SABESP (amendment)

Rhea-AI Filing Summary

BlackRock, Inc. filed an amended Schedule 13G/A reporting beneficial ownership of 55,121,116 shares of COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO‑SABESP (Common Stock), representing 7.8% of the class. The filing shows 53,514,514 shares with sole voting power and 55,121,116 shares with sole dispositive power. The amendment is signed by Spencer Fleming on 04/24/2026.

Key Figures

Shares beneficially owned: 55,121,116 shares Percent of class: 7.8% Sole voting power: 53,514,514 shares +3 more

6 metrics

Shares beneficially owned 55,121,116 shares Amount beneficially owned (Item 4(a))

Percent of class 7.8% Percent of class (Item 4(b))

Sole voting power 53,514,514 shares Sole power to vote (Item 4(c)(i))

Sole dispositive power 55,121,116 shares Sole power to dispose (Item 4(c)(iii))

CUSIP P2R268136 CUSIP listed on cover and Item 2(d)

Signature date 04/24/2026 Signed by Spencer Fleming

Key Terms

Schedule 13G/A, beneficially owned, sole dispositive power, sole voting power

4 terms

Schedule 13G/A regulatory

"In accordance with SEC Release No. 34-39538... Schedule 13G/A"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

beneficially owned financial

"Amount beneficially owned: 55121116"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 55121116"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

sole voting power regulatory

"Sole power to vote or to direct the vote: 53514514"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/24/2026 - 04:11 PM Learn about SEC filing dates

FAQ

What stake does BlackRock report in SBS?

BlackRock reports beneficial ownership of 55,121,116 shares (7.8%). The filing specifies sole voting power on 53,514,514 shares and sole dispositive power on 55,121,116 shares, as shown on the Schedule 13G/A cover data.

Does BlackRock control voting for SBS shares?

BlackRock reports sole voting power on 53,514,514 shares. The Schedule 13G/A indicates shared voting power is 0 and sole dispositive power equals 55,121,116 shares, per the ownership table in the amendment.

Is BlackRock required to identify underlying beneficial owners for SBS?

The filing states various persons may have dividend or sale rights, none exceed 5% individually. It notes that listing shareholders of investment companies or employee-benefit plan beneficiaries is not required under Item 6.

What is the CUSIP and class reported for SBS?

The filing lists CUSIP P2R268136 for Common Stock. The cover page and Item 2 identify the security class as Common Stock and provide the issuer's principal office address in Sao Paulo, Brazil.

When was the Schedule 13G/A amendment signed?

The amendment is signed by Spencer Fleming on 04/24/2026. That signature date appears at the end of the filing beneath the signature block and exhibit references.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP

(Name of Issuer)

Common Stock

(Title of Class of Securities)

P2R268136

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): P2R268136

1

Names of Reporting Persons

BlackRock, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 53,514,514.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 55,121,116.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

55,121,116.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.8 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP
(b)	Address of issuer's principal executive offices: Rua Costa Carvalho 300 Sao Paulo Brazil 05429-900
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: P2R268136
Item 4.	Ownership
(a)	Amount beneficially owned: 55121116
(b)	Percent of class: 7.8 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 53514514
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 55121116
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the common stock of COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP. No one person's interest in the common stock of COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP is more than five percent of the total outstanding common shares.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	04/24/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7