# EDGAR Filing Document

**Accession Number:** 0001084201
**File Stem:** 0001213900-26-068483
**Filing Date:** 2026-6
**Character Count:** 5551
**Document Hash:** cc7a7ddf844787d1f1b5be2736aa9b61
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-26-068483.hdr.sgml**: 20260615

**ACCESSION NUMBER**: 0001213900-26-068483

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260615

**FILED AS OF DATE**: 20260615

**DATE AS OF CHANGE**: 20260615

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SINOVAC BIOTECH LTD
- **CENTRAL INDEX KEY:** 0001084201
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 000000000
- **STATE OF INCORPORATION:** B9
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-32371
- **FILM NUMBER:** 261088971

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** NO. 39 SHANGDI XI ROAD
- **STREET 2:** HAIDIAN DISTRICT
- **CITY:** BEIJING
- **NON US STATE TERRITORY:** CHINA
- **PROVINCE COUNTRY:** F4
- **ZIP:** 100085
- **BUSINESS PHONE:** 86-10-82799800

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** NO. 39 SHANGDI XI ROAD
- **STREET 2:** HAIDIAN DISTRICT
- **CITY:** BEIJING
- **NON US STATE TERRITORY:** CHINA
- **PROVINCE COUNTRY:** F4
- **ZIP:** 100085

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NET FORCE SYSTEMS INC
- **DATE OF NAME CHANGE:** 19991110

**UNITED STATES<br> 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 June 2026

Commission File Number: 001-32371

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 ☒ 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. | SINOVAC BIOTECH LTD. |
| By: | /s/ Nan Wang |
| Name: | Nan Wang |
| Title: | Chief Financial Officer |

---

Date: June 15, 2026

**Exhibit Index**

Exhibit 99.1 [Press Release](ea029474501ex99-1.htm)

## Exhibit 99.1

**Exhibit 99.1**

**SINOVAC Regained Compliance With the Nasdaq Global Market's Listing Requirements**

BEIJING, China June 15, 2026 – Sinovac Biotech Ltd. (Nasdaq: SVA) ("SINOVAC" or the "Company"), a leading provider of biopharmaceutical products in China, today announced that it received a notification letter dated June 10, 2026 (the "Notification Letter"), from Hearing Advisor of The Nasdaq Stock Market LLC., indicating that the Company has regained compliance with Listing Rule 5250(c)(1) and that the Company is therefore in compliance with the Nasdaq Global Market's listing requirements. As noted in the Hearing Panel's May 20, 2026 compliance determination, the Company remains under a Mandatory Panel Monitor pursuant to Listing Rule 5815(d)(4)(B) until May 20, 2027.

The Company filed its annual report on Form 20-F for the year ended December 31, 2025 on June 5, 2026. The Notification Letter also stated that the hearing before the Hearings Panel, applied for by the Company, had accordingly been canceled.

**About SINOVAC**

Sinovac Biotech Ltd. (SINOVAC) is a China-based global biopharmaceutical company, with a mission of "supply vaccines to eliminate human diseases", the company specializes in the research, development, manufacturing and commercialization of vaccines and related biological products that protect against human infectious diseases.

The Company's diversified portfolio includes vaccines for influenza, viral hepatitis, varicella, Hand-Foot-Mouth disease (HFMD), poliomyelitis, pneumococcal disease, etc., of which 3 vaccines have been prequalified by WHO, including inactivated hepatitis A vaccine Healive<sup>®</sup>, Sabin-strain inactivated polio vaccine (sIPV), and varicella vaccine.

SINOVAC has a leading edge in developing vaccines to combat infectious disease outbreaks and was among the first to initiate R&D during major public health emergencies, including SARS, H5N1, H1N1, and COVID-19. The company developed the world's first inactivated SARS vaccine (Phase I completed), China's first H5N1 influenza vaccine (Panflu<sup>®</sup>), the world's first H1N1 influenza vaccine (Panflu.1<sup>®</sup>), and CoronaVac<sup>®</sup>, the most widely used inactivated COVID-19 vaccine globally.

Beyond its marketed portfolio, the Company is advancing a robust pipeline that includes combination vaccines, recombinant protein vaccines and next-generation platforms such as mRNA technologies and antibodies.

With a long-standing commitment to innovation and global health, SINOVAC is expanding its global footprint by strengthening partnerships with research institutions, international organizations, and local partners. Through broader market presence, technological cooperation, and localized production, the Company aims to accelerate vaccine development and supply, enhance regional access to high-quality products, and better address unmet medical needs while improving preparedness for future pandemics.

For more information, please see the Company's website at *www.sinovac.com.cn* or *www.sinovac.com*.

**Contacts**

Sinovac Biotech Ltd.<br> Helen Yang<br> Tel: +86-10-8279 9779<br> Email: ir@sinovac.com