6-K

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 June 2026

Commission File Number: 001-41431

Polestar Automotive Holding UK PLC

Assar Gabrielssons Väg 9

405 31 Göteborg, Sweden

(Address of principal executive 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  x                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):  ¨

INFORMATION CONTAINED IN THIS REPORT ON FORM 6-K

On June 25, 2026, Polestar Automotive Holding UK PLC (“Polestar”) issued a press release announcing a strengthened focus on Europe following the U.S. Department of Commerce's Bureau of Industry and Security’s decision to not grant Polestar an authorization under the current Connected Vehicle Rule to sell vehicles in the United States beginning with 2027 models and onwards. A copy of the press release is attached hereto as Exhibit 99.1.

Exhibit 99.1 to this Report on Form 6-K shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act.

EXHIBIT INDEX

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.

Exhibit 99.1

Polestar strengthens its focus on Europe following decision underthe U.S. Connected Vehicle Rule

GOTHENBURG, SWEDEN – 25 June 2026. Polestar (Nasdaq: PSNY) is increasing its strategic focus on Europe, which currently represents close to 80% of the Company’s retail sales volumes, by continuing to expand its sales network and preparing to localize the manufacturing of future models.

This follows a decision from the U.S. Department of Commerce’s Bureau of Industry and Security to not grant Polestar an authorization under the current Connected Vehicle Rule to sell vehicles in the U.S. from model year 2027 onwards.

The Company will continue to sell existing stock of Polestar 3 and Polestar 4 in the U.S. and will continue to support customers, including providing access to its service network.

94% of Polestar’s retail sales volumes in the first quarter of 2026 originated from markets outside the U.S.

Michael Lohscheller, Polestar CEO, said: “The automotive industry is entering a new phase, based on regional dynamics. Our strategy reflects that, with Europe being our largest growth engine and our plan to manufacture Polestar 7 in Europe. Our record sales in 2025 and the first quarter of 2026 show that we are making strong progress, with several new market launches taking place in Europe this year. In addition, we will continue to invest in markets where we have opportunities to continue to grow, like Southeast Asia, Eastern Europe, Latin America and Canada.”

“Polestar continues to challenge bigger, more established players thanks to our impressive cars and growing model line-up. Polestar 5 has received incredible feedback from the global media, with customer deliveries set to start during the summer. A new variant of our global bestseller, Polestar 4, is planned for the second half of this year, followed by the all-new Polestar 2 in 2027, and thereafter the Polestar 7 compact SUV.”

Ends.

About Polestar

Polestar (Nasdaq: PSNY) is the Swedishelectric performance car brand with a focus on uncompromised design and innovation, and the ambition to accelerate the change towardsa sustainable future. Headquartered in Gothenburg, Sweden, its cars are available in 31 markets globally across North America, Europeand Asia Pacific.

Polestar has four models in its line-up:Polestar 2, Polestar 3, Polestar 4, and Polestar 5. Planned models include Polestar 4 new variant (to be introduced in the last quarterof 2026), Polestar 2 successor (to be launched early in 2027), Polestar 7 compact SUV (to be introduced in 2028) and the Polestar 6 roadster.With its vehicles currently manufactured on two continents, North America and Asia, Polestar is diversifying its manufacturing footprintfurther, with production of Polestar 7 planned in Europe.

Polestar has an unwavering commitment tosustainability and has set an ambitious roadmap to reach its climate targets: halve greenhouse gas emissions by 2030 per-vehicle-soldand become climate-neutral across its value chain by 2040. Polestar’s comprehensive sustainability strategy covers the four areasof Climate, Transparency, Circularity, and Inclusion.

Forward-Looking Statements

Certain statements in this press release (“Press Release”)may be considered “forward-looking statements” as defined in the Private Securities Litigation Reform Act of 1995. Forward-lookingstatements generally relate to future events or the future financial or operating performance of Polestar including the number of vehicledeliveries and gross margin. For example, projections of revenue, volumes, margins, cash flow break-even and other financial or operatingmetrics and statements regarding expectations of future needs for funding and plans related thereto are forward-looking statements. Insome cases, you can identify forward-looking statements by terminology such as “may”, “should”, “expect”, “intend”, “will”, “estimate”, “anticipate”, “believe”, “predict”, “potential”, “forecast”, “plan”, “seek”, “future”, “propose” or “continue”, or the negatives of these terms or variations of them or similar terminology. Such forward-looking statementsare subject to risks, uncertainties, and other factors which could cause actual results to differ materially from those expressed or impliedby such forward looking statements.

These forward-looking statements are based upon estimates and assumptionsthat, while considered reasonable by Polestar and its management, as the case may be, are inherently uncertain. Factors that may causeactual results to differ materially from current expectations include, but are not limited to: (1) Polestar’s ability to enterinto or maintain agreements or partnerships with its strategic partners, including Volvo Cars and Geely, original equipment manufacturers,vendors and technology providers; (2) Polestar’s ability to maintain relationships with its existing suppliers, source newsuppliers for its critical components and enter into longer term supply contracts and complete building out its supply chain; (3) Polestar’sability to raise additional funding; (4) Polestar’s ability to successfully execute cost-cutting activities and strategic efficiencyinitiatives; (5) Polestar’s estimates of expenses, profitability, gross margin, cash flow, and cash reserves; (6) Polestar’sability to continue to meet stock exchange listing standards; (7) changes in domestic and foreign business, market, financial, politicaland legal conditions; (8) demand for Polestar’s vehicles or car sale volumes, revenue and margin development based on pricing,variant and market mix, cost reduction efficiencies, logistics and growing aftersales; (9) delays in the expected timelines for thedevelopment, design, manufacture, launch and financing of Polestar’s vehicles and Polestar’s reliance on a limited numberof vehicle models to generate revenues; (10) increases in costs, disruption of supply or shortage of materials, in particular forlithium-ion cells or semiconductors; (11) risks related to product recalls, regulatory fines and/or an unexpectedly high volume of warrantyclaims; (12) Polestar’s reliance on its partners to manufacture vehicles at a high volume, some of which have limited experiencein producing electric vehicles, and on the allocation of sufficient production capacity to Polestar by its partners in order for Polestarto be able to increase its vehicle production volumes; (13) the ability of Polestar to grow and manage growth profitably, maintain relationshipswith customers and suppliers and retain its management and key employees; (14) risks related to future market adoption of Polestar’sofferings; (15) risks related to Polestar’s current distribution model and the evolution of its distribution model in the future;(16) the effects of competition and the high barriers to entry in the automotive industry and the pace and depth of electric vehicle adoptiongenerally on Polestar’s future business; (17) changes in regulatory requirements (including environmental laws and regulations andregulations related to connected vehicles and Polestar’s response to the US government’s denial of a specific authorizationfor the US), governmental incentives, tariffs and fuel and energy prices; (18) Polestar’s reliance on the development of vehiclecharging networks to provide charging solutions for its vehicles and its strategic partners for servicing its vehicles and their integratedsoftware; (19) Polestar’s ability to establish its brand and capture additional market share, and the risks associated with negativepress or reputational harm, including from electric vehicle fires; (20) the outcome of any potential litigation, including litigationinvolving Polestar and Gores Guggenheim, Inc., government and regulatory proceedings, including the NHTSA investigation into thePolestar 2 rear view camera, tax audits, investigations and inquiries; (21) Polestar’s ability to continuously and rapidly innovate,develop and market new products; (22) the impact of the ongoing conflict between Ukraine and Russia and the conflict with Iran and theconflict in the Red Sea; and (23) other risks and uncertainties set forth in the sections entitled “Risk Factors” and “CautionaryNote Regarding Forward-Looking Statements” in Polestar’s Form 20-F, and other documents filed, or to be filed, with theSEC by Polestar. There may be additional risks that Polestar presently does not know or that Polestar currently believes are immaterialthat could also cause actual results to differ from those contained in the forward-looking statements.

Nothing in this Press Release should be regarded as a representationby any person that the forward-looking statements set forth herein will be achieved or that any of the contemplated results of such forward-lookingstatements will be achieved. You should not place undue reliance on forward-looking statements, which speak only as of the date they aremade. Polestar assumes no obligation to update these forward-looking statements, even if new information becomes available in the future,except as may be required by law.