Insider filing report for Changes in Beneficial Ownership
- Schedule 13G & 13D forms are used to report a party's ownership of stock which exceeds 5% of a company's total stock issue.
- Schedule 13G is a shorter version of Schedule 13D with fewer reporting requirements.
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 |
SCHEDULE 13D
Under the Securities Exchange Act of 1934
(Amendment No. 1)*
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SINOVAC BIOTECH LTD. (Name of Issuer) |
Common Shares (Title of Class of Securities) |
P8696W104 (CUSIP Number) |
Xingluo Zhu Suite 1707-08, 17/F, One Exchange Square, 8 Connaught Place, Central Hong Kong, K3, 000000 86-10-8593-5676 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) |
04/09/2025 (Date of Event Which Requires Filing of This Statement) |
If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.


The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the
Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other
provisions of the Act (however, see the Notes).
SCHEDULE 13D
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CUSIP No. | P8696W104 |
1 |
Name of reporting person
Advantech Capital L.P. | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
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3 | SEC use only | ||||||||
4 |
Source of funds (See Instructions)
WC | ||||||||
5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
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6 | Citizenship or place of organization
CAYMAN ISLANDS
| ||||||||
Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
11 | Aggregate amount beneficially owned by each reporting person
5,851,423.00 | ||||||||
12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
![]() | ||||||||
13 | Percent of class represented by amount in Row (11)
8.14 % | ||||||||
14 | Type of Reporting Person (See Instructions)
PN |
Comment for Type of Reporting Person:
Comments to item 13: Based on 71,860,702 Common Shares of the Issuer outstanding as of March 31, 2024 according to the Issuer's annual report on Form 20-F for the fiscal year ended December 31, 2023 (the "2023 Annual Report").
SCHEDULE 13D
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CUSIP No. | P8696W104 |
1 |
Name of reporting person
Advantech Capital Partners Ltd. | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
![]() ![]() | ||||||||
3 | SEC use only | ||||||||
4 |
Source of funds (See Instructions)
WC | ||||||||
5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
![]() | ||||||||
6 | Citizenship or place of organization
CAYMAN ISLANDS
| ||||||||
Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
11 | Aggregate amount beneficially owned by each reporting person
5,851,423.00 | ||||||||
12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
![]() | ||||||||
13 | Percent of class represented by amount in Row (11)
8.14 % | ||||||||
14 | Type of Reporting Person (See Instructions)
CO |
Comment for Type of Reporting Person:
Comments to item 13: Based on 71,860,702 Common Shares of the Issuer outstanding as of March 31, 2024 according to the 2023 Annual Report.
SCHEDULE 13D
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CUSIP No. | P8696W104 |
1 |
Name of reporting person
Green Vision Partners Limited | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
![]() ![]() | ||||||||
3 | SEC use only | ||||||||
4 |
Source of funds (See Instructions)
WC | ||||||||
5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
![]() | ||||||||
6 | Citizenship or place of organization
CAYMAN ISLANDS
| ||||||||
Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
11 | Aggregate amount beneficially owned by each reporting person
5,851,423.00 | ||||||||
12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
![]() | ||||||||
13 | Percent of class represented by amount in Row (11)
8.14 % | ||||||||
14 | Type of Reporting Person (See Instructions)
CO |
Comment for Type of Reporting Person:
Comments to item 13: Based on 71,860,702 Common Shares of the Issuer outstanding as of March 31, 2024 according to the 2023 Annual Report.
SCHEDULE 13D
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CUSIP No. | P8696W104 |
1 |
Name of reporting person
Prime Success, L.P. | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
![]() ![]() | ||||||||
3 | SEC use only | ||||||||
4 |
Source of funds (See Instructions)
WC | ||||||||
5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
![]() | ||||||||
6 | Citizenship or place of organization
CAYMAN ISLANDS
| ||||||||
Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
11 | Aggregate amount beneficially owned by each reporting person
5,851,423.00 | ||||||||
12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
![]() | ||||||||
13 | Percent of class represented by amount in Row (11)
8.14 % | ||||||||
14 | Type of Reporting Person (See Instructions)
PN |
Comment for Type of Reporting Person:
Comments to item 13: Based on 71,860,702 Common Shares of the Issuer outstanding as of March 31, 2024 according to the 2023 Annual Report.
SCHEDULE 13D
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Item 1. | Security and Issuer | |
(a) | Title of Class of Securities:
Common Shares | |
(b) | Name of Issuer:
SINOVAC BIOTECH LTD. | |
(c) | Address of Issuer's Principal Executive Offices:
No. 39 Shangdi Xi Road, Haidian District, Beijing,
CHINA
, 100085. | |
Item 1 Comment:
This Amendment No.1 to Schedule 13D is being filed on behalf of Advantech Capital L.P., Advantech Capital Partners Ltd., Green Vision Partners Limited and Prime Success, L.P. (each, a "Reporting Person") to amend the Schedule 13D relating to the common shares, par value $0.001 per share (the "Common Shares"), of Sinovac Biotech Ltd. (the "Issuer"), filed by the Reporting Persons on March 25, 2025. The items herein amend the information disclosed under the corresponding items of the original Schedule 13D. Capitalized terms used herein and not otherwise defined have the meanings given to them in the original Schedule 13D. | ||
Item 4. | Purpose of Transaction | |
Item 4 is hereby supplemented and amended by adding the following:The Issuer's announcement on April 1, 2025 implies that the New Board will take steps to determine whether the Reporting Persons' shares in the Issuer are valid and that the Issuer will issue a cash dividend to shareholders that excludes the Reporting Persons' entitlement. The Reporting Persons intend to take all necessary action to protect their entitlement. In connection thereto, on April 9, 2025 the Reporting Persons requested to join an arbitration that Vivo Capital initiated in March 2025 against the Issuer at the Hong Kong International Arbitration Centre seeking, among other things, a declaration affirming the Reporting Persons' rights to its entitlement. The Reporting Persons may take additional actions as needed to further protect their rights and investment.Except as set forth herein as may be necessary for defending their lawful interests in the Issuer in relation to the 2018 Private Placement, either alone or in coordination with any one or more shareholders of the Issuer, the Reporting Persons have no present plan or intention that would result in or relate to any of the transactions described in clauses (a) through (j) of Item 4 of Schedule 13D. Depending on discussions with other shareholders of the Issuer, the financial condition, results of operations and prospects of the Issuer and other factors that the Reporting Persons deem relevant, the Reporting Persons may take steps and pursue other plans or proposals that relate to or would result in any of the matters set forth in clauses (a) through (j) of Item 4 of Schedule 13D. The filing of this Amendment shall not be construed as an admission that the Reporting Persons and their affiliates, on the one hand, and any other shareholders of the Issuer and their affiliates, on the other hand, are a group, or have agreed to act as a group with each other for purposes of Section 13(d) of the Act or for any other purpose. The Reporting Persons expressly disclaim beneficial ownership of the common shares beneficially owned by other shareholders of the Issuer. | ||
Item 5. | Interest in Securities of the Issuer | |
(a) | Item 5 is hereby amended and restated as follows:The information requested by this paragraph is incorporated herein by reference to the information provided on the cover pages to this Amendment No.1 to Schedule 13D. | |
(b) | The information requested by this paragraph is incorporated herein by reference to the information provided on the cover pages to this Amendment No.1 to Schedule 13D. | |
(c) | No Reporting Person has, and to the knowledge of the Reporting Persons, no Person named in Item 2 to this Amendment No.1 to Schedule 13D has, effected any other transactions in the securities of the Issuer during the past 60 days. | |
(d) | Except as otherwise described herein, and to the knowledge of the Reporting Person, no other person has the right to receive o
r the power to direct the receipt of dividends from, or the proceeds from the sale of, the Common Shares owned by the Reporting Person. | |
(e) | Not applicable. | |
Item 6. | Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer | |
Item 6 is hereby supplemented and amended by adding the following:Item 4 of this Amendment No. 1 to Schedule 13D is incorporated herein by reference. |
SIGNATURE | |
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
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