<SEC-DOCUMENT>0001144204-19-009658.txt : 20190222
<SEC-HEADER>0001144204-19-009658.hdr.sgml : 20190222
<ACCEPTANCE-DATETIME>20190222172113
ACCESSION NUMBER:		0001144204-19-009658
CONFORMED SUBMISSION TYPE:	8-A12B
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20190222
DATE AS OF CHANGE:		20190222

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SINOVAC BIOTECH LTD
		CENTRAL INDEX KEY:			0001084201
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			B9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-A12B
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32371
		FILM NUMBER:		19626739

	BUSINESS ADDRESS:	
		STREET 1:		NO. 15 ZHI TONG ROAD,
		STREET 2:		ZHONGGUANCUN TECH PARK, CHANGPING DISTR.
		CITY:			BEIJING
		STATE:			F4
		ZIP:			102200
		BUSINESS PHONE:		86-10-82890088

	MAIL ADDRESS:	
		STREET 1:		NO. 15 ZHI TONG ROAD,
		STREET 2:		ZHONGGUANCUN TECH PARK, CHANGPING DISTR.
		CITY:			BEIJING
		STATE:			F4
		ZIP:			102200

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NET FORCE SYSTEMS INC
		DATE OF NAME CHANGE:	19991110
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-A12B
<SEQUENCE>1
<FILENAME>tv514037_8a12b.htm
<DESCRIPTION>8-A12B
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<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNITED STATES</B></P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="text-transform: uppercase"><B>W</B></FONT><B>ashington<FONT STYLE="text-transform: uppercase">,
D.C.&nbsp; 20549</FONT></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>FORM 8-A</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>FOR REGISTRATION OF CERTAIN CLASSES OF
SECURITIES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>PURSUANT TO SECTION 12(b) OR 12(g) OF
THE </B><BR>
<B>SECURITIES EXCHANGE ACT OF 1934</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SINOVAC BIOTECH LTD.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Exact name of registrant as specified
in its charter)</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD STYLE="vertical-align: top; width: 49%; text-align: center"><B><U>Antigua, West Indies</U></B></TD>
    <TD STYLE="vertical-align: bottom; width: 2%; text-align: center">&nbsp;</TD>
    <TD STYLE="vertical-align: top; width: 49%; text-align: center"><B><U>Not Applicable</U></B></TD></TR>
<TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">(State or other jurisdiction</FONT></TD>
    <TD STYLE="vertical-align: bottom; text-align: center">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">(I.R.S. Employer Identification</FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">of incorporation or organization)</FONT></TD>
    <TD STYLE="vertical-align: bottom; text-align: center">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">Number)</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 49%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>No. 15 Zhi Tong Road,</B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Zhongguancun Science and Technology Park</B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Changping District, Beijing 102200</B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B><U>People&rsquo;s Republic of China</U></B></P></TD>
    <TD STYLE="width: 2%; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 49%; text-align: center"><B><U>Not Applicable</U></B></TD></TR>
<TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">(Address of Principal Executive Offices)</FONT></TD>
    <TD STYLE="vertical-align: bottom; text-align: center">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">(Zip Code)</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Securities to be registered pursuant to Section 12(b) of the
Act:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD STYLE="vertical-align: top; width: 49%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Title of each class</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><U>to be so registered</U></P></TD>
    <TD STYLE="vertical-align: bottom; width: 2%; text-align: center">&nbsp;</TD>
    <TD STYLE="vertical-align: top; width: 49%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Name of each exchange on which</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><U>each class is to be registered</U></P></TD></TR>
<TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt"><B>Preferred Share Purchase Rights</B></FONT></TD>
    <TD STYLE="vertical-align: bottom; text-align: center">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt"><B>The NASDAQ Stock Market LLC</B></FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">If this form relates to the registration of a class of securities
pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c), check the following box.
<FONT STYLE="font-family: Wingdings">&#120;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">If this form relates to the registration of a class of securities
pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A.(d), check the following box.
<FONT STYLE="font-family: Wingdings">&#168;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Securities Act registration statement file number to which this
form relates: _____________ (If applicable)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Securities to be registered pursuant to Section 12(g) of the
Act:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B><U>None</U></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Title of Class)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0in"><B>Item 1. Description
of Registrant&rsquo;s Securities to be Registered</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">On February 22, 2019, Sinovac Biotech Ltd.
(the &ldquo;<I>Company</I>&rdquo;) entered into an Amended and Restated Rights Agreement between the Company and Pacific Stock
Transfer Company, as Rights Agent (as amended from time to time, the &ldquo;<I>Amended and Restated Rights Agreement</I>&rdquo;)
that was previously approved by the Board of Directors of the Company.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">In connection with the Amended and
Restated Rights Agreement, a dividend was declared of one preferred share purchase right (individually, a
&ldquo;<I>Right</I>&rdquo; and collectively, the &ldquo;<I>Rights</I>&rdquo;) for each common share, par value $0.001 per
share (the &ldquo;<I>Common Shares</I>&rdquo;) and each Series B Convertible Preferred Share, par value $0.001 (the
&ldquo;<I>Series B Preferred Shares</I>&rdquo;), of the Company outstanding at the close of business on February 22, 2019
(the &ldquo;<I>Record Date</I>&rdquo;). Each Right will entitle the registered holder thereof, after the Rights become
exercisable and until February 22, 2020 (or the earlier redemption, exchange or termination of the Rights), to purchase from
the Company one one-thousandth of a Series C Junior Participating Preferred Share, par value $0.001 per share (the
&ldquo;<I>Series C Preferred Shares</I>&rdquo;), of the Company at a price of $20.00 per one one-thousandth of a Series C
Preferred Share (the &ldquo;<I>Purchase Price</I>&rdquo;). Until the earlier to occur of (i) the close of business on the
tenth business day following a public announcement that a person or group of affiliated or associated persons has
acquired, or obtained the right to acquire, beneficial ownership of 15% or more of the Common Shares (an &ldquo;<I>Acquiring
Person</I>&rdquo;) or (ii) the close of business on the tenth business day (or such later date as may be determined by action
of the Board of Directors prior to such time as any person or group of affiliated or associated persons becomes an Acquiring
Person) following the commencement or announcement of an intention to make a tender offer or exchange offer the consummation
of which would result in a person or group becoming an Acquiring Person (the earlier of (i) and (ii) being called the
&ldquo;<I>Distribution Date</I>&rdquo;), the Rights will be evidenced, with respect to any of the Common Share certificates
or Series B Preferred Share certificates outstanding as of the Record Date, by such Common Share certificates and Series B
Preferred Share certificates, or, with respect to any uncertificated Common Shares or Series B Preferred Shares registered in
book entry form, by notation in book entry, in either case together with a copy of the Summary of Rights attached as Exhibit
C to the Amended and Restated Rights Agreement. Under the Rights Agreement, synthetic ownership of Common Shares and Series B
Preferred Shares in the form of derivative securities counts towards the ownership threshold, to the extent actual Common
Shares or Series B Preferred Shares equivalent to the economic exposure created by the derivative security are directly or
indirectly beneficially owned by a counterparty to such derivative security.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The Amended and Restated Rights Agreement
provides that any person who beneficially owned 15% or more of the aggregate total of Common Shares and Series B Preferred Shares
immediately prior to the first public announcement of the adoption of the Amended and Restated Rights Agreement, together with
any affiliates and associates of that person (each an &ldquo;<I>Existing Holder</I>&rdquo;), shall not be deemed to be an &ldquo;Acquiring
Person&rdquo; for purposes of the Amended and Restated Rights Agreement unless an Existing Holder becomes the beneficial owner
of one or more additional Common Shares of Series B Preferred Shares (other than pursuant to a dividend or distribution paid or
made by the Company on the outstanding Common Shares in or Series B Preferred Shares in Common Shares or Series B Preferred Shares
or pursuant to a split or subdivision of the outstanding Common Shares or Series B Preferred Shares) and upon acquiring such additional
shares, the Existing Holder beneficially owns 15% or more of the aggregate total of Common Shares and Series B Preferred Shares
then outstanding.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The Rights will be transferred only with
the Common Shares and Series B Preferred Shares until the Distribution Date (or earlier redemption, exchange, termination or expiration
of the Rights). As soon as practicable following the Distribution Date, separate certificates evidencing the Rights (&ldquo;<I>Right
Certificates</I>&rdquo;) will be mailed to holders of record of the Common Shares and Series B Preferred Shares as of the close
of business on the Distribution Date and such separate Right Certificates alone will evidence the Rights.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The Rights are not exercisable until
the Distribution Date. The Rights will expire on February 22, 2020, subject to the Company&rsquo;s right to extend such date,
unless earlier redeemed or exchanged by the Company or terminated. The Rights will at no time have any voting rights.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Each Series C Preferred Share purchasable
upon exercise of the Rights will be entitled, when, as and if declared, to a minimum preferential quarterly dividend payment equal
to the greater of (i) $1.00 or (ii) 1,000 times the dividend, if any, declared per Common Share and Series B Preferred Share. In
the event of liquidation, dissolution or winding up of the Company, the holders of the Series C Preferred Shares will be entitled
to a minimum preferential liquidation payment of $1,000 per share (plus any accrued but unpaid dividends), provided that such holders
of the Series C Preferred Shares will be entitled to an aggregate payment of 1,000 times the payment made per Common Share and
Series B Preferred Share. Each Series C Preferred Share will have 1,000 votes and will vote together with the Common Shares and
Series B Preferred Shares. Finally, in the event of any merger, consolidation or other transaction in which Common Shares or Series
B Preferred Shares are exchanged, each Series C Preferred Share will be entitled to receive 1,000 times the amount received per
Common Share and Series B Preferred Share. The Series C Preferred Shares will not be redeemable. The Rights are protected by customary
anti-dilution provisions. Because of the nature of the Series C Preferred Share&rsquo;s dividend and liquidation rights, the value
of one one-thousandth of a Series C Preferred Share purchasable upon exercise of each Right should approximate the value of Common
Share.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The Purchase Price payable, and the number
of one one-thousandths of a Series C Preferred Share or other securities or property issuable, upon exercise of the Rights are
subject to adjustment from time to time to prevent dilution (i) in the event of a stock dividend on, or a subdivision, combination
or reclassification of, the Series C Preferred Shares, (ii) upon the grant to holders of the Series C Preferred Shares of certain
rights or warrants to subscribe for or purchase Series C Preferred Shares or convertible securities at less than the current market
price of the Series C Preferred Shares or (iii) upon the distribution to holders of Series C Preferred Shares of evidences of indebtedness,
cash, securities or assets (excluding regular periodic cash dividends at a rate not in excess of 125% of the rate of the last regular
periodic cash dividend theretofore paid or, in case regular periodic cash dividends have not theretofore been paid, at a rate not
in excess of 50% of the average net income per share of the Company for the four quarters ended immediately prior to the payment
of such dividend, or dividends payable in Series C Preferred Shares (which dividends will be subject to the adjustment described
in clause (i) above)) or of subscription rights or warrants (other than those referred to above).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">In the event that a person becomes an Acquiring
Person or if the Company were the surviving corporation in a merger with an Acquiring Person or any affiliate or associate of an
Acquiring Person and Common Shares or Series B Preferred Shares were not changed or exchanged in such merger, each holder of a
Right, other than Rights that are or were acquired or beneficially owned by the Acquiring Person (which Rights will thereafter
be void), will thereafter have the right to receive upon exercise that number of Common Shares having a market value of two times
the then current Purchase Price of one Right. In the event that, after a person has become an Acquiring Person, the Company were
acquired in a merger or other business combination transaction or more than 50% of its assets or earning power were sold, proper
provision shall be made so that each holder of a Right shall thereafter have the right to receive, upon the exercise thereof at
the then current Purchase Price of the Right, that number of shares of common stock of the acquiring company which at the time
of such transaction would have a market value of two times the then current Purchase Price of one Right.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">At any time after a person becomes an Acquiring
Person and prior to the earlier of one of the events described in the last sentence of the previous paragraph or the acquisition
by such Acquiring Person of 50% or more of the then outstanding Common Shares, the Board of Directors may cause the Company to
exchange the Rights (other than Rights owned by an Acquiring Person which have become void), in whole or in part, for Common Shares
at an exchange rate of one Common Share per Right (subject to adjustment).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The Rights may be redeemed in whole, but
not in part, at a price of $0.001 per Right (the &ldquo;<I>Redemption Price</I>&rdquo;) by the Board of Directors at any time prior
to the time that an Acquiring Person has become such. The redemption of the Rights may be made effective at such time, on such
basis and with such conditions as the Board of Directors in its sole discretion may establish. Immediately upon any redemption
of the Rights, the right to exercise the Rights will terminate and the only right of the holders of Rights will be to receive the
Redemption Price.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Until a Right is exercised, the holder thereof,
as such, will have no rights as a shareholder of the Company beyond those as an existing shareholder, including, without limitation,
the right to vote or to receive dividends.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Any of the provisions of the Amended and
Restated Rights Agreement may be amended by the Board of Directors of the Company, or a duly authorized committee thereof, for
so long as the Rights are then redeemable, and after the Rights are no longer redeemable, the Company may amend or supplement the
Amended and Restated Rights Agreement in any manner that does not adversely affect the interests of the holders of the Rights (other
than an Acquiring Person or any affiliate or associate of an Acquiring Person).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">One Right will be distributed to shareholders
of the Company for each Common Share and Series B Preferred Share owned of record by them on February 22, 2019. As long as the
Rights are attached to the Common Shares and Series B Preferred Shares, the Company will issue one Right with each new Common Share
and Series B Preferred Share so that all such shares will have attached Rights. The Company has agreed that, from and after the
Distribution Date, the Company will reserve and keep available out of its authorized and unissued Series C Preferred Shares, the
number of Series C Preferred Shares that will be sufficient to permit the exercise in full of all outstanding Rights.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The Rights are designed to assure that all
of the Company&rsquo;s shareholders receive fair and equal treatment in the event of any proposed takeover of the Company and to
guard against partial tender offers, open market accumulations and other abusive or coercive tactics to gain control of the Company
without paying all shareholders a control premium. The Rights will cause substantial dilution to a person or group that acquires
15% or more of the aggregate total of Common Shares and Series B Preferred Shares on terms not approved by the Company&rsquo;s
Board of Directors. The Rights should not interfere with any merger or other business combination approved by the Board of Directors
at any time prior to the first date that a person or group has become an Acquiring Person.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The Amended and Restated Rights Agreement
specifying the terms of the Rights and the text of the press release announcing the declaration of the Rights are incorporated
herein by reference as exhibits to this registration statement. The foregoing summary of the Amended and Restated Rights Agreement
is qualified in its entirety by reference to such exhibits.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in"><B>Item 2. Exhibits</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">&nbsp;</P>

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<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.25in">1.</TD><TD>Amended and Restated Rights Agreement, dated as of February 22, 2019, between Sinovac Biotech Ltd. and Pacific Stock
                                                               Transfer Company, which includes the Form of Certificate of Designations of Series C Junior Participating Preferred Shares
                                                               as                                                                Exhibit A, the Form of Right Certificate as Exhibit&nbsp;B
                                                               and the Summary of Rights to Purchase Preferred Shares as Exhibit
                                                               C (incorporated by reference to Exhibit 99.6 of the Current Report on Form 6-K of Sinovac Biotech Ltd. filed with the
                                                               Securities and Exchange Commission on February                                                                22,
                                                               2019).</TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.25in">2.</TD><TD>Press Release of Sinovac Biotech Ltd., dated February 22, 2019 (incorporated by reference to Exhibit 99.1 of the Current Report
on Form 6-K of Sinovac Biotech Ltd. filed with the
                                                               Securities and Exchange Commission on February 22, 2019).</TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SIGNATURE</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Pursuant to the requirements of Section 12 of the Securities
Exchange Act of 1934, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned,
thereto duly authorized.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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<TR STYLE="vertical-align: top">
    <TD COLSPAN="3">&nbsp;</TD>
    <TD COLSPAN="2"><FONT STYLE="font-size: 10pt">Sinovac Biotech Ltd.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="3">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 5%"><FONT STYLE="font-size: 10pt">Date:</FONT></TD>
    <TD STYLE="width: 25%"><FONT STYLE="font-size: 10pt">&nbsp;February 22, 2019</FONT></TD>
    <TD STYLE="width: 20%">&nbsp;</TD>
    <TD STYLE="width: 4%; white-space: nowrap"><FONT STYLE="font-size: 10pt">By:&nbsp;</FONT></TD>
    <TD STYLE="width: 46%; border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt">&nbsp;/s/ Nan Wang</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="3">&nbsp;</TD>
    <TD COLSPAN="2"><FONT STYLE="font-size: 10pt">Name: Nan Wang</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="3">&nbsp;</TD>
    <TD COLSPAN="2"><FONT STYLE="font-size: 10pt">Title: Chief Financial Officer</FONT></TD></TR>
<TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>



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