Masterbeef director reports 3.45M-share stake

MASTERBEEF GROUP director and ten percent owner So Tsz Kiu filed an initial ownership report showing indirect control over 3,448,125 Ordinary Shares of the company.

Rhea-AI Filing Summary

MASTERBEEF GROUP director and ten percent owner So Tsz Kiu filed an initial ownership report showing indirect control over 3,448,125 Ordinary Shares of the company. These shares are held by Thrivors Holdings Limited and represent Ordinary Shares with a par value of $0.0005 each.

So Tsz Kiu owns approximately 30% of Thrivors Holdings Limited and serves on its board together with one other individual, which means they share voting and investment power over the MASTERBEEF GROUP shares held by Thrivors. The filing does not reflect any new purchase or sale, only the existing indirect holdings.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider So Tsz Kiu

Role Director, 10% Owner

Type	Security	Shares	Price	Value
holding	Ordinary Shares, par value $0.0005	--	--	--

Holdings After Transaction: Ordinary Shares, par value $0.0005 — 3,448,125 shares (Indirect, See Footnote No.)

Footnotes (1)

1. F1. Represents the Ordinary Shares held by Thrivors Holdings Limited. The Reporting Person holds of record approximately 30% of the ordinary shares of Thrivors Holdings Limited. The Reporting Person, together with one other individual, is a member of the board of directors ofThrivors Holdings Limited and hence is deemed to have shared voting and investment power over the Ordinary Shares of the Issuer held by Thrivors Holdings Limited.

Key Figures

Indirectly held shares: 3,448,125 shares Par value per share: $0.0005 per share Stake in Thrivors Holdings Limited: approximately 30%

3 metrics

Indirectly held shares 3,448,125 shares Total Ordinary Shares indirectly held following reporting

Par value per share $0.0005 per share Ordinary Shares par value

Stake in Thrivors Holdings Limited approximately 30% Ordinary shares of Thrivors held by So Tsz Kiu

Key Terms

Ordinary Shares, indirect ownership, voting and investment power, ten percent owner

4 terms

Ordinary Shares financial

"Represents the Ordinary Shares held by Thrivors Holdings Limited."

Ordinary shares are a type of ownership stake in a company, giving shareholders a right to participate in the company’s profits and decision-making through voting. They are similar to owning a piece of a business, and their value can rise or fall based on the company's performance. Investors buy ordinary shares to potentially earn dividends and benefit from the company's growth over time.

indirect ownership financial

"Represents the Ordinary Shares held by Thrivors Holdings Limited."

voting and investment power financial

"is deemed to have shared voting and investment power over the Ordinary Shares"

ten percent owner financial

"The Reporting Person is marked as a ten percent owner."

FAQ

What does the Form 3 filing by So Tsz Kiu for MASTERBEEF GROUP (MB) show?

The Form 3 shows So Tsz Kiu’s initial report as a director and ten percent owner, indicating indirect control over 3,448,125 Ordinary Shares held through Thrivors Holdings Limited, rather than reporting any new purchase or sale of MASTERBEEF GROUP stock.

How many MASTERBEEF GROUP (MB) shares are indirectly held for So Tsz Kiu?

The filing reports indirect control over 3,448,125 Ordinary Shares. These shares are not held directly by So Tsz Kiu but through Thrivors Holdings Limited, where the reporting person is a significant shareholder and board member with shared voting and investment power.

What is Thrivors Holdings Limited’s role in So Tsz Kiu’s MASTERBEEF GROUP (MB) stake?

Thrivors Holdings Limited is the entity that directly holds the 3,448,125 MASTERBEEF GROUP Ordinary Shares. So Tsz Kiu owns about 30% of Thrivors and sits on its board, so they are deemed to share voting and investment power over these indirectly held shares.

Does So Tsz Kiu’s Form 3 for MASTERBEEF GROUP (MB) indicate any recent share purchases or sales?

No, the Form 3 does not indicate recent purchases or sales. It is an initial beneficial ownership report that simply discloses existing indirect holdings of 3,448,125 Ordinary Shares through Thrivors Holdings Limited, rather than documenting trading activity.

Why is So Tsz Kiu considered a ten percent owner of MASTERBEEF GROUP (MB)?

They are classified as a ten percent owner because of significant indirect holdings. The Form 3 shows 3,448,125 Ordinary Shares attributed through Thrivors Holdings Limited, where So Tsz Kiu owns roughly 30% and shares voting and investment power over these MASTERBEEF GROUP shares.

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

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Accepted by SEC EDGAR 04/13/2026 - 10:51 AM Learn about SEC filing dates

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^*

So Tsz Kiu

(Last) (First) (Middle)

UNIT 1509-10, TOWER 1,

EVER GAIN PLAZA, 88 CONTAINER PORT ROAD

(Street)

KWAI CHUNG, NEW TERRITORIES

(City) (State) (Zip)

HONG KONG

(Country)

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

3. Issuer Name and Ticker or Trading Symbol
MASTERBEEF GROUP [ MB ]

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)

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

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)
Ordinary Shares, par value $0.0005	3,448,125(1)	I	See Footnote No.(1)

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

Explanation of Responses:

1. Represents the Ordinary Shares held by Thrivors Holdings Limited. The Reporting Person holds of record approximately 30% of the ordinary shares of Thrivors Holdings Limited. The Reporting Person, together with one other individual, is a member of the board of directors ofThrivors Holdings Limited and hence is deemed to have shared voting and investment power over the Ordinary Shares of the Issuer held by Thrivors Holdings Limited.

	/s/ So Tsz Kiu	04/13/2026
	** 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)