UNITED STATES
SECURITIES AND EXCHANGE COMMISSION 

WASHINGTON, DC 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 August 2023 

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Commission File Number: 001-32371

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SINOVAC BIOTECH LTD.

No. 39 Shangdi Xi Rd, Haidian District 

Beijing 100085, 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     ¨

SIGNATURE

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.

SINOVAC BIOTECH LTD.

By:	/s/ Nan Wang
Name:	Nan Wang
Title:	Chief Financial Officer

Date:           August 29, 2023

Exhibit Index

Exhibit 99.1 Press Release