6-K

UNITEDSTATES

SECURITIESAND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 6-K

REPORT OF FOREIGN PRIVATEISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

OF THE SECURITIES EXCHANGEACT OF 1934

For the month of January2026

Commission File Number: 001-41782

VinFast Auto Ltd.

Dinh Vu – CatHai Economic Zone

Cat Hai Island, CatHai Special Zone

Hai Phong City, Vietnam

(Address of principalexecutive office)

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

INFORMATIONCONTAINED IN THIS REPORT ON FORM 6-K

VINFASTREPORTS RECORD DELIVERIES OF 406,453 ELECTRIC SCOOTERS IN 2025 IN VIETNAM

Hanoi, January 26, 2026– VinFast Auto Ltd. (“VinFast” or the “Company”) announced its preliminary domestic Vietnam deliveries of406,453 electric scooters^1^ (“e-scooters”) for the full year 2025, representing approximately 5.7 times its domesticdeliveries in 2024.

This achievement was driven by VinFast’s broad range of e-scooter products designed to serve diverse customer needs, reaffirming the Company’s leading position in the electric two-wheeler market^2^ and reflecting the strong acceleration of Vietnam’s transition from traditional fuel-powered two-wheelers to electric two-wheelers.

Notably, 253,178 Evo models^1^ across various variants were delivered, making the Evo series VinFast’s best-selling e-scooter model.

This Form 6-K shall be deemed to be incorporated by reference into the Company’s registration statement on Form S-8 (File No. 333-278251), registration statement on Form F-3 (File No. 333-275133), and registration statement on Form F-3 (File No. 333-291445) (including any prospectuses forming a part of such registration statements) and to be a part thereof from the date on which this report is furnished, to the extent not superseded by documents or reports subsequently filed or furnished.

Note 1: Preliminary delivery results are subjectto change and may differ from the final number of deliveries that will be recognized as vehicle sales revenue for the period as a resultof the year end audit.

Note 2: Market and industry statements in thisdocument are based on Company research.

About VinFast

VinFast (NASDAQ: VFS) – a subsidiaryof Vingroup JSC – is Vietnam’s leading automotive manufacturer, committed to its mission of creating a green future for everyone.VinFast produces a range of electric SUVs, e-scooters, e-bikes, and e-buses in Vietnam and exports to key markets across Asia, North America,and Europe. Learn more at www.vinfastauto.us.

VinFast deliveries represent only one measure of the Company’s financial performance and should not be relied on as an indicator of quarterly financial results, which depend on a variety of factors, including the average selling price and various cost components.

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SIGNATURE

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

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