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 April2026

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 ORDERS AND DEALER SHIPMENTS FOR ELECTRIC SCOOTERS IN MARCH 2026 IN VIETNAM

Hanoi, April 6, 2026– VinFast Auto Ltd. (“VinFast” or the “Company”) announced that it received more than 135,000 orders forelectric scooters (“e-scooters”) from dealers and shipped over 93,000 e-scooters to dealers in Vietnam in March 2026. Thisrecord growth reflects the strong momentum of the green transition and further reinforces VinFast’s solid position and growing influencein Vietnam’s motorbike market.

Among VinFast’s product lineup, Evo and Feliz were the best-selling e-scooter models during the month, with more than 52,000 Evo units and more than 24,000 Feliz units sold by dealers to end customers.

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registration statements) and to be a part thereof from the date on which this report is furnished, to the extent not superseded by documents or reports subsequently filed or furnished.

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.

Vehicle orders may not result in completed sales. 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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