Banco Santander (Brasil) S.A. (NYSE: BSBR) officer sells 42,545 UNIT - SANB11

Rhea-AI Filing Summary

Banco Santander (Brasil) S.A. officer Mariana Cahen Margulies reported a sale of 42,545 UNIT - SANB11 on August 4, 2026 at $5.70 per unit, leaving 40,275 units held directly. The reported U.S. dollar price corresponds to R$29.09 per share using an exchange rate of R$5.1047 per US$1.00 from the Brazilian Central Bank.

Insider Trade Summary

Net Seller: 42,545 shares

Net Sell 1 txn

Insider Margulies Mariana Cahen

Role Officer w/o Specific Desig

Sold 42,545 shs ($243K)

Type	Security	Shares	Price	Value
Sale	UNIT - SANB11 F1	42,545	$5.70	$243K

Holdings After Transaction: UNIT - SANB11 — 40,275 shares (Direct)

Footnotes (1)

1. F1. Equivalent to R$29.09 per share. Amounts presented were converted into U.S. dollars at the exchange rate of R$ 5.1047 per U.S.$1.00 as reported by Brazilian Central Bank on August 04, 2026.

Key Figures

Units sold: 42,545 UNIT - SANB11 Sale price per unit: $5.70 Holdings after transaction: 40,275 UNIT - SANB11 +2 more

5 metrics

Units sold 42,545 UNIT - SANB11 Non-derivative sale on August 4, 2026

Sale price per unit $5.70 Reported price per UNIT - SANB11 in U.S. dollars

Holdings after transaction 40,275 UNIT - SANB11 Direct ownership position following the sale

Brazilian real equivalent R$29.09 per share Equivalent value per share using stated exchange rate

Exchange rate R$5.1047 per US$1.00 Rate from Brazilian Central Bank on August 4, 2026

Key Terms

UNIT - SANB11, exchange rate, Brazilian Central Bank

3 terms

UNIT - SANB11 financial

"The security transacted is titled "UNIT - SANB11""

exchange rate financial

"Amounts were converted using an exchange rate of R$5.1047 per US$1.00"

Exchange rate is the price of one currency expressed in another—for example, how many euros you receive for one US dollar. It matters to investors because changes in that price alter the reported profits, costs and value of assets for companies and portfolios that operate or hold money across borders; think of it like switching measurement units, where the same item can look bigger or smaller depending on the unit used.

Brazilian Central Bank financial

"Rate as reported by the Brazilian Central Bank on August 04, 2026"

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/06/2026 - 05:06 PM Accepted by SEC EDGAR 08/06/2026 - 05:05 PM Learn about SEC filing dates

FAQ

What insider transaction did Banco Santander (Brasil) S.A. (BSBR) disclose in this filing?

Banco Santander (Brasil) S.A. disclosed that officer Mariana Cahen Margulies sold 42,545 UNIT - SANB11 on August 4, 2026. The transaction was reported as a direct ownership sale at $5.70 per unit, with holdings reduced but not eliminated.

How many BSBR UNIT - SANB11 securities did Mariana Cahen Margulies sell?

Mariana Cahen Margulies sold 42,545 UNIT - SANB11 of Banco Santander (Brasil) S.A. (BSBR). This sale decreased her direct holdings but she continues to own 40,275 units after the transaction, according to the reported post-transaction balance.

What price did the BSBR officer receive per UNIT - SANB11 in this sale?

The reported sale price was $5.70 per UNIT - SANB11. A footnote explains this corresponds to approximately R$29.09 per share, based on an exchange rate of R$5.1047 per US$1.00 from the Brazilian Central Bank on August 4, 2026.

How many Banco Santander (Brasil) S.A. (BSBR) units does Margulies hold after the transaction?

Following the sale, Mariana Cahen Margulies directly holds 40,275 UNIT - SANB11 of Banco Santander (Brasil) S.A. (BSBR). This figure represents her reported direct ownership position immediately after the August 4, 2026 transaction.

Was the BSBR insider sale made under a Rule 10b5-1 trading plan?

The filing indicates the transaction was not made pursuant to a Rule 10b5-1 trading plan. The document-level checkbox for Rule 10b5-1 plans is marked false, meaning no such pre-arranged trading plan was affirmed for this reported sale.

In what currency terms is the BSBR insider sale reported and how is it converted?

The transaction is reported in U.S. dollars at $5.70 per unit, with an explanatory conversion to R$29.09 per share. This uses an exchange rate of R$5.1047 per US$1.00, as reported by the Brazilian Central Bank on August 4, 2026.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Margulies Mariana Cahen

(Last) (First) (Middle)

AV PRESIDENTE JUSCELINO KUBITSCHEK, 2041

CJ 281, BLOCO A, COND. WTORRE JK

(Street)

SAO PAULO SAO PAULO 04543-011

(City) (State) (Zip)

BRAZIL

(Country)

2. Issuer Name and Ticker or Trading Symbol
Banco Santander (Brasil) S.A. [ BSBR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Officer w/o Specific Desig

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/04/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
UNIT - SANB11	08/04/2026	08/04/2026	S		42,545	D	$5.7(1)	40,275	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Equivalent to R$29.09 per share. Amounts presented were converted into U.S. dollars at the exchange rate of R$ 5.1047 per U.S.$1.00 as reported by Brazilian Central Bank on August 04, 2026.

	/s/ Mariana Cahen Margulies	08/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)