Millicom (TIGO) CAO discloses 66,964 shares and stock rights

Rhea-AI Filing Summary

Millicom International Cellular SA’s Chief Accounting Officer, Celso T. Vianna, filed an initial Form 3 reporting his equity stake in the company. He holds 66,964 common shares, including 18,072 common shares subject to restricted share units that vest based on continued service.

Vianna also holds stock appreciation rights tied to 8,324 underlying common shares with an exercise price of $20.30 per share. These rights become exercisable after January 1, 2027 and expire on January 1, 2034, and upon exercise pay cash equal to the share price gain over the exercise price.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Vianna Celso T

Role Chief Accounting Officer

Type	Security	Shares	Price	Value
holding	Stock Appreciation Rights	--	--	--
holding	Common Shares	--	--	--

Holdings After Transaction: Stock Appreciation Rights — 8,324 shares (Direct); Common Shares — 66,964 shares (Direct)

Footnotes (1)

1. Includes 18,072 common shares subject to outstanding restricted share units granted to the reporting person in consideration for service to the issuer which vest based on the reporting person's continued service through the applicable vesting dates. Upon exercise, each stock appreciation right entitles the reporting person to an amount in cash equal to the excess of the fair market value of a common share of the issuer over the exercise price per common share, subject to the reporting person's continued service through the date exercisable.

Understanding Insider Trading Forms →

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Vianna Celso T

(Last) (First) (Middle)

C/O MILLICOM INTERNATIONAL CELLULAR S.A.

8400 NW 36TH STREET, SUITE 530

(Street)

DORAL FLORIDA 33166

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
MILLICOM INTERNATIONAL CELLULAR SA [ TIGO ]

3a. Foreign Trading Symbol

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

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

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

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

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

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Shares	66,964(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Appreciation Rights	01/01/2027	01/01/2034	Common Shares	8,324(2)	$20.3	D

Explanation of Responses:

1. Includes 18,072 common shares subject to outstanding restricted share units granted to the reporting person in consideration for service to the issuer which vest based on the reporting person's continued service through the applicable vesting dates.

2. Upon exercise, each stock appreciation right entitles the reporting person to an amount in cash equal to the excess of the fair market value of a common share of the issuer over the exercise price per common share, subject to the reporting person's continued service through the date exercisable.

	/s/ Celso T Vianna	03/18/2026
	** 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 5 (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 3: SEC 1473 (03-26)

FAQ

What does Celso T. Vianna’s Form 3 for MILLICOM (TIGO) report?

The Form 3 reports Celso T. Vianna’s initial equity holdings in Millicom. It shows his common share ownership and equity awards such as restricted share units and stock appreciation rights, providing a baseline of his beneficial ownership as Chief Accounting Officer.

How many Millicom (TIGO) common shares does Celso T. Vianna hold?

Celso T. Vianna reports holding 66,964 Millicom common shares. This amount includes 18,072 common shares subject to outstanding restricted share units that will vest over time, conditioned on his continued service with the company through the applicable vesting dates.

What restricted share units are disclosed for Celso T. Vianna in TIGO?

Vianna’s holdings include 18,072 common shares tied to restricted share units. These units were granted as consideration for his service to Millicom and will vest only if he continues serving the company through the specified vesting dates, aligning compensation with ongoing employment.

What stock appreciation rights does Celso T. Vianna hold in Millicom (TIGO)?

He holds stock appreciation rights over 8,324 underlying common shares. Each right has an exercise price of $20.30 per share, becomes exercisable after January 1, 2027, and expires on January 1, 2034, paying cash equal to the share price increase over the exercise price.

Do Celso T. Vianna’s stock appreciation rights in TIGO settle in shares or cash?

The stock appreciation rights settle in cash rather than in shares. Upon exercise, each right entitles him to receive cash equal to the excess of Millicom’s common share fair market value over the $20.30 exercise price, subject to his continued service.

Does this Millicom (TIGO) Form 3 show recent insider buying or selling?

The Form 3 does not report recent open-market buying or selling. It is an initial ownership filing that lists Celso T. Vianna’s existing common share holdings and equity awards, rather than documenting new purchase or sale transactions in Millicom stock.