Company: PLSAY
Filing Date: 2025-12-04
Form Type: 6-K
Source: 0001104659-25-118467
Chunk: 0

Company: Polestar Automotive Holding UK PLC
Filing Date: 2025-12-04
Form: 6-K
Chunk 0
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<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of December 2025

Commission File Number: 001-41431

Polestar Automotive Holding UK PLC

Assar Gabrielssons Väg 9

405 31 Göteborg, Sweden

(Address of principal executive office)</div>

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

<div align='center'>Form 20-F x Form 40-F ¨</div>

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): ¨

<div align='center'>INFORMATION CONTAINED IN THIS REPORT ON FORM 6-K</div>

On December 4, 2025, Polestar
Automotive Holding UK PLC issued a press release announcing the date for implementation of the previously announced ratio change of its
Class A, Class B, Class C-1 and Class C-2 American Depositary Shares to the respective Class A, Class B, Class C-1 and Class C-2 ordinary
shares. A copy of the press release is attached hereto as Exhibit 99.1.

This Report on Form 6-K and
Exhibit 99.1 shall be deemed to be incorporated by reference into Polestar’s registration statement on Form S-8 (File No. 333-267146),
registration statement on Form F-3 (File No. 333-266101) and registration statement on Form F-3 (File No. 333-274918) and to be a part
thereof from the date on which this report is submitted, to the extent not superseded by documents or reports subsequently filed or furnished.

<div align='center'>EXHIBIT INDEX</div>

<div align='center'>SIGNATURES</div>

Pursuant to the requirements of the Securities
Exchange Act of 1934, the registrant has