Report of Foreign Issuer (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 September 2020

Commission File Number: 001- 39167

Molecular Data Inc.

5/F, Building 12, 1001 North Qinzhou Road

Xuhui District, Shanghai 201109

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 of 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

Molecular Data Inc. Announces Changes to its Senior Management

Molecular Data Inc. (“Molecular Data” or the “Company”) (Nasdaq: MKD), a leading technology-driven platform in China’s chemical industry, today announced that Mr. Li Li, co-founder and vice president of the Company, will step down from his current position for personal reasons, effective September 29, 2020, and will serve as the vice president of the strategy advisory committee of the Company.

2

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.