6-K

UNITEDSTATES

SECURITIESAND EXCHANGE COMMISSION

Washington,D.C. 20549

FORM6-K

REPORTOF FOREIGN PRIVATE ISSUER

PURSUANTTO RULE 13a-16 OR 15d-16

UNDERTHE SECURITIES EXCHANGE ACT OF 1934

Forthe month of October 2025

CommissionFile Number: 001-42826

ZentaGroup Company Limited

(Registrant’sName)

Avenidado Infante D. Henrique,

No.47-53A, Macau Square,

13thFloor, Unit M,

Macau999078

(Addressof Principal Executive Offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F ☒              Form 40-F ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ☐

Entryinto a Material Definitive Agreement.

Cathay Securities, Inc., as representative of the several underwriters named in the underwriting agreement, in connection with the initial public offering (“IPO”) of Zenta Group Company Limited, an exempted company with limited liability formed in the Cayman Islands (the “Company”), notified the Company of their decision to exercise the over-allotment option to purchase an additional 225,000 ordinary shares (the “Over-allotment Shares”) of the Company, par value $0.001 per share, at a price of $4.00 per share. The Closing for the sale of the Over-allotment Shares took place on October 8, 2025.

Gross proceeds of the Company’s IPO, including the proceeds from the sale of the Over-allotment Shares, totaled approximately $6.9 million, before deducting underwriting discounts and other related expenses.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: October 9, 2025

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