TIM S.A. (TIMB) CIO executes open-market sale of 8,200 common shares, retains 36,686

Rhea-AI Filing Summary

TIM S.A. Chief Information Officer Auana Mattar reported an open-market sale of 8,200 Common Shares at $4.42 per share. After this transaction, Mattar directly holds 36,686 Common Shares. This filing highlights a discretionary sale by a senior executive while maintaining a substantial continuing ownership stake.

Insights

Insider transactions analyst

CIO executes a modest open-market share sale while retaining a sizable stake.

The Chief Information Officer of TIM S.A., Auana Mattar, conducted an open-market sale of 8,200 Common Shares at $4.42 per share. The transaction is coded as an open-market or private sale, indicating a discretionary decision rather than automatic tax withholding or compensation vesting.

Following the sale, Mattar directly holds 36,686 Common Shares, so the filing shows continued meaningful equity exposure. There are no derivative positions listed in the data provided, suggesting this report focuses solely on common-stock ownership. Overall, this looks like a routine insider sale rather than a transformative event.

Insider Trade Summary

Net Seller: 8,200 shares ($36,244)

Net Sell 1 txn

Insider Lima Auana Mattar

Role Chief Information Officer

Sold 8,200 shs ($36K)

Type	Security	Shares	Price	Value
Sale	Common Shares	8,200	$4.42	$36K

Holdings After Transaction: Common Shares — 36,686 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 8,200 shares Sale price per share: $4.42 per share Shares held after transaction: 36,686 shares +1 more

4 metrics

Shares sold 8,200 shares Common Shares sold on May 18, 2026

Sale price per share $4.42 per share Open-market sale price for Common Shares

Shares held after transaction 36,686 shares Direct Common Share ownership following sale

Transaction code S Sale in open market or private transaction

Key Terms

open-market sale, Common Shares, Form 4, direct ownership

4 terms

open-market sale financial

"reported an open-market sale of 8,200 Common Shares at $4.42 per share"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Shares financial

"reported an open-market sale of 8,200 Common Shares at $4.42 per share"

Common shares are the basic units of ownership in a company that give holders a claim on profits and a right to vote on key matters, like electing the board. Think of them as membership cards in a club: they let you share in successes and losses, but in a bankruptcy or liquidation they are paid after creditors and preferred shareholders, so their value can swing more and matters for assessing risk and potential return.

Form 4 regulatory

"under SEC Form 4 rules"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

direct ownership financial

"The Form 4 indicates direct ownership after the transaction."

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Form 4 Insider Transactions: What Each Field Means →

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^*

Lima Auana Mattar

(Last) (First) (Middle)

JOAO CABRAL DE MELO NETO AVENUE

850 - SOUTH TOWER - 12TH FLOOR

(Street)

RIO DE JANEIRO BRAZIL 22775-057

(City) (State) (Zip)

BRAZIL

(Country)

2. Issuer Name and Ticker or Trading Symbol
TIM S.A. [ TIMB ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Information Officer

2a. Foreign Trading Symbol
[TIMS3]

3. Date of Earliest Transaction (Month/Day/Year)
05/18/2026

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
Common Shares	05/18/2026		S		8,200	D	$4.42	36,686	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:

Remarks:

All prices were converted from Brazilian Real (BRL) to U.S. Dollars (USD) based on the closing foreign exchange rate for the applicable transaction date as follows: USD 1.00 = BRL 5.01 on May 18, 2026.

	/s/ Auana Mattar Lima	05/20/2026
	** 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)

FAQ

What insider transaction did TIMB executive Auana Mattar report?

Auana Mattar, Chief Information Officer of TIM S.A., reported an open-market sale of 8,200 Common Shares at $4.42 per share. The transaction is classified as a sale in the open market or a private transaction under SEC Form 4 rules.

How many TIMB shares does the CIO hold after this Form 4 sale?

After selling 8,200 Common Shares, CIO Auana Mattar directly holds 36,686 TIM S.A. shares. This post-transaction balance shows she maintains a significant continuing equity position in the company despite the reported open-market sale.

Was the TIMB insider transaction a buy or a sell?

The reported transaction is a sell. Auana Mattar executed an open-market sale of 8,200 Common Shares at $4.42 per share, coded as an "S" transaction, which denotes a sale in the open market or private transaction under SEC reporting standards.

What type of security did TIMB’s CIO trade in this filing?

The filing shows a transaction in Common Shares of TIM S.A. Auana Mattar sold 8,200 Common Shares in an open-market or private transaction, with no derivative securities such as options or warrants reported in the provided transaction data.

Does the TIMB Form 4 filing mention any derivative positions?

The provided data lists no derivative positions for Auana Mattar in this Form 4. The derivativeSummary is empty, indicating the filing focuses solely on common-share holdings and the reported open-market sale of 8,200 Common Shares.

Is the TIMB CIO’s share ownership direct or indirect after the sale?

The Form 4 indicates direct ownership after the transaction. The ownership code is "D" for direct, and the nature_of_ownership field is not populated, showing the 36,686 Common Shares are held directly rather than through a separate entity or trust.