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 April 2021

Commission File Number: 001-39407

Li Auto Inc.

(Registrant’s Name)

11 Wenliang Street

Shunyi District, Beijing 101399

People’s Republic of China

(Address of 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 x      Form 40-F o

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): o

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): o

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.

Date: April 2, 2021

Exhibit 99.1

Li Auto Inc. March 2021 Delivery Update

BEIJING, China, April 2, 2021 — Li Auto Inc. (“Li Auto” or the “Company”) (Nasdaq: LI), an innovator in China’s new energy vehicle market, today announced that the Company delivered 4,900 Li ONEs in March 2021, representing a 238.6 % year-over-year increase. This brought deliveries for the first quarter of 2021 to 12,579, up 334.4 % year over year.

As of March 31, 2021, the Company had 65 retail stores covering 49 cities, and 135 servicing centers and Li Auto-authorized body and paint shops operating in 98 cities. In response to robust demand for Li ONEs and in anticipation of new model launches in 2022 and beyond, Li Auto plans to further bolster its direct sales and servicing network.

About Li Auto Inc.

Li Auto Inc. is an innovator in China’s new energy vehicle market. The Company designs, develops, manufactures, and sells premium smart electric vehicles. Through innovations in product, technology, and business model, the Company provides families with safe, convenient, and refined products and services. Li Auto is a pioneer to successfully commercialize extended-range electric vehicles in China. Its first model, Li ONE, is a six-seat, large premium electric SUV equipped with a range extension system and cutting-edge smart vehicle solutions. The Company started volume production of Li ONE in November 2019 and delivered over 33,500 Li ONEs as of December 31, 2020. The Company leverages technology to create value for its users. It concentrates its in-house development efforts on its proprietary range extension system, next-generation electric vehicle technology, and smart vehicle solutions. Beyond Li ONE, the Company aims to expand its product line by developing new vehicles, including BEVs and EREVs, to target a broader consumer base.

For more information, please visit: http://ir.lixiang.com.

Safe Harbor Statement

This press release contains statements that may constitute “forward-looking” statements pursuant to the “safe harbor” provisions of the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements can be identified by terminology such as “will,” “expects,” “anticipates,” “aims,” “future,” “intends,” “plans,” “believes,” “estimates,” “likely to,” and similar statements. Li Auto may also make written or oral forward-looking statements in its periodic reports to the U.S. Securities and Exchange Commission (the “SEC”), in its annual report to shareholders, in press releases and other written materials, and in oral statements made by its officers, directors, or employees to third parties. Statements that are not historical facts, including statements about Li Auto’s beliefs, plans, and expectations, are forward-looking statements. Forward-looking statements involve inherent risks and uncertainties. A number of factors could cause actual results to differ materially from those contained in any forward-looking statement, including but not limited to the following: Li Auto’s strategies, future business development, and financial condition and results of operations; Li Auto’s limited operating history; risks associated with extended-range electric vehicles, Li Auto’s ability to develop, manufacture, and deliver vehicles of high quality and appeal to customers; Li Auto’s ability to generate positive cash flow and profits; product defects or any other failure of vehicles to perform as expected; Li Auto’s ability to compete successfully; Li Auto’s ability to build its brand and withstand negative publicity; cancellation of orders for Li Auto’s vehicles; Li Auto’s ability to develop new vehicles; and changes in consumer demand and government incentives, subsidies, or other favorable government policies. Further information regarding these and other risks is included in Li Auto’s filings with the SEC. All information provided in this press release is as of the date of this press release, and Li Auto does not undertake any obligation to update any forward-looking statement, except as required under applicable law.

For investor and media inquiries, please contact:

Li Auto Inc.

Investor Relations

Email: ir@lixiang.com

The Piacente Group, Inc.

Yang Song

Tel: +86-10-6508-0677

Email: Li@tpg-ir.com

Brandi Piacente

Tel: +1-212-481-2050

Email: Li@tpg-ir.com