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Sinovac Biotech, Ltd.

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FY2015 Annual Report · Sinovac Biotech, Ltd.
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UNITED STATES 
SECURITIES AND EXCHANGE COMMISSION 
WASHINGTON, DC 20549 

FORM 20-F 

(Mark One) 


REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934

OR



ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 
For the fiscal year ended December 31, 2015

OR



TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

OR



SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Date of event requiring this shell company report 

For the transition period from                       to 

Commission file number: 001-32371 

SINOVAC BIOTECH LTD.
(Exact name of Registrant as specified in its charter)

N/A
(Translation of Registrant’s name into English)

Antigua, West Indies
(Jurisdiction of incorporation or organization)

No. 39 Shangdi Xi Road,
Haidian District, Beijing 100085 
People’s Republic of China
(Address of principal executive offices)

Nan Wang
Chief Financial Officer 
No. 39 Shangdi Xi Road, 
Haidian District, Beijing 100085 
People’s Republic of China 
Tel: +86-10-8289-0088 
Fax: +86-10-6296-6910 
E-mail: ir@sinovac.com
(Name, Telephone, E-mail and/or Facsimile number and Address of Company Contact Person)

Securities registered or to be registered pursuant to Section 12(b) of the Act: 

Title of each class
Common Shares, par value $0.001 per share 
Preferred Share Purchase Rights 

Name of each exchange on which registered
The NASDAQ Stock Market LLC 
(The NASDAQ Global Select Market)

Securities registered or to be registered pursuant to Section 12(g) of the Act: 

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act: 

None
(Title of Class)

None
(Title of Class)

  
  
  
  
  
  
  
  
  
  
   
  
  
  
 
 
 
 
 
 
Indicate the number of outstanding shares of each of the issuer’s classes of capital or common stock as of the close of the period covered by the annual report. 

56,906,561 common shares as of December 31, 2015

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. 

Yes  No

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the 
Securities Exchange Act of 1934. 

Yes  No

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during 
the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for 
the past 90 days. 

 Yes  No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to 
be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or such shorter period that the registrant was required to 
submit and post such files). 

 Yes  No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of “accelerated filer and 
large accelerated filer” in Rule 12b-2 of the Exchange Act. (Check one): 
  Accelerated filer 
Large accelerated filer 

Non-accelerated filer 

Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing: 
U.S. GAAP 

Other 

International Financial Reporting Standards as issued 
by the International Accounting Standards Board 

If “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow. 

 Item 17  Item 18

If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). 

 Yes  No

(APPLICABLE ONLY TO ISSUERS INVOLVED IN BANKRUPTCY PROCEEDINGS DURING THE PAST FIVE YEARS) 

Indicate by check mark whether the registrant has filed all documents and reports required to be filed by Sections 12, 13 or 15(d) of the Securities Exchange Act 
of 1934 subsequent to the distribution of securities under a plan confirmed by a court. 

Yes  No

  
  
  
  
  
  
  
  
  
  
  
  
  
 
  
 
 
 
CONTENTS 

INTRODUCTION

PART I

ITEM 1.
ITEM 2.
ITEM 3.
ITEM 4.
ITEM 4A.
ITEM 5.
ITEM 6.
ITEM 7.
ITEM 8.
ITEM 9.
ITEM 10.
ITEM 11.
ITEM 12.

Identity of Directors, Senior Management and Advisers
Offer Statistics and Expected Timetable
Key Information
Information on the Company
Unresolved Staff Comments
Operating and Financial Review and Prospects
Directors, Senior Management and Employees
Major Shareholders and Related Party Transactions
Financial Information
The Offer and Listing
Additional Information
Quantitative and Qualitative Disclosures about Market Risk
Description of Securities other than Equity Securities

PART II

ITEM 13.
ITEM 14.
ITEM 15.
ITEM 16A.
ITEM 16B.
ITEM 16C.
ITEM 16D.
ITEM 16E.
ITEM 16F.
ITEM 16G.
ITEM 16H.

Defaults, Dividend Arrearages and Delinquencies
Material Modifications to the Rights of Security Holders and Use of Proceeds
Controls and Procedures
Audit Committee Financial Expert
Code of Ethics
Principal Accountant Fees and Services
Exemptions from the Listing Standards for Audit Committees
Purchases of Equity Securities by the Issuer and Affiliated Purchasers
Change in Registrant’s Certifying Accountant
Corporate Governance
Mine Safety Disclosure

PART III

ITEM 17.
ITEM 18.
ITEM 19.

Financial Statements
Financial Statements
Exhibits

Page

1

2

2
2
2
31
47
47
64
73
74
75
76
87
87

88

88
88
88
89
90
90
90
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91

91
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91

  
  
  
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
INTRODUCTION 

In this annual report on Form 20-F, unless otherwise indicated or unless the context otherwise requires, 











“Sinovac,” “Company,” “we,” “us,” “our company,” and “our” refer to Sinovac Biotech Ltd., its predecessor entities and its consolidated subsidiaries

“China,” “Chinese” or the “PRC” refers to the People’s Republic of China, excluding, for the purposes of this annual report on Form 20-F only, Taiwan and
the special administrative regions of Hong Kong and Macau;

“RMB” or “renminbi” refers to the legal currency of China; and “$” or “U.S. dollars” refers to the legal currency of the United States;

“shares” or “common shares” refers to our common shares, par value $0.001 per share; and

“U.S. GAAP” refers to generally accepted accounting principles in the United States.

Discrepancies in any table between the amounts identified as total amounts and the sum of the amounts listed therein are due to rounding. 

This annual report contains translations of certain renminbi amounts into U.S. dollars at specified rates solely for the convenience of the readers. All translations
from renminbi to U.S. dollars were made at the noon buying rate in The City of New York for cable transfers in renminbi per U.S. dollar as certified for customs
purposes by the Federal Reserve Bank of New York, or the noon buying rate. Unless otherwise stated, the translation of renminbi into U.S. dollars has been
made at the noon buying rate in effect on December 31, 2015, which was RMB6.4778 to $1.00. We make no representation that the renminbi or U.S. dollar
amounts referred to in this annual report could have been or could be converted into U.S. dollars or renminbi, as the case may be, at any particular rate or at all.
On April 15, 2016, the noon buying rate was RMB6.4730 to $1.00. 

1

  
  
  
  
  
  
  
  
  
  
  
 
PART I 

ITEM 1. IDENTITY OF DIRECTORS, SENIOR MANAGEMENT AND ADVISERS 

Not applicable. 

ITEM 2. OFFER STATISTICS AND EXPECTED TIMETABLE 

Not applicable. 

ITEM 3. KEY INFORMATION 

A. Selected Financial Data

The  following  selected  consolidated  statements  of  comprehensive  income  (loss)  data  for  the  fiscal  years  ended  December  31,  2015,  2014  and  2013,  and
consolidated balance sheet data as of December 31, 2015 and 2014 have been derived from our audited consolidated financial statements that are included in
this  annual  report  beginning  on  page  F-1.  The  following  selected  consolidated  statements  of  comprehensive  income  (loss)  data  for  the  fiscal  years  ended
December 31, 2012 and 2011 and consolidated balance sheet data as of December 31, 2013, 2012 and 2011 have been derived from our audited consolidated
financial statements that are not included in this annual report. Amounts previously reported have been reclassified, as necessary, to conform to discontinued
operations presentation in accordance with ASC 205, Presentation of Financial Statements to allow for meaningful comparison of continuing operations. 

Our historical results do not necessarily indicate results expected for any future periods. The selected consolidated financial data should be read in conjunction
with  our  audited  consolidated  financial  statements  and  related  notes  and  Item  5  “Operating  and  Financial  Review  and  Prospects”  below.  Our  audited
consolidated financial statements are prepared and presented in accordance with U.S. GAAP. 

Consolidated statements of
Comprehensive income (loss) data

Sales
Cost of sales(1)
Gross profit
Operating expenses:
Selling, general and administrative expenses(1)
Provision (recovery) for doubtful accounts
Research and development expenses(1)
Loss on disposal and impairment of property, plant and equipment
Government grants recognized in income
Total operating expenses
Operating income (loss)
Interest and financing expenses
Interest income
Other income (expenses)
Income (loss) before income taxes and non-controlling interests
Income tax benefit (expenses)
Income (loss) from continuing operations
Loss from discontinued operations, net of tax nil
Net income (loss)
Less: (income) loss attributable to non-controlling interests
Net income (loss) attributable to shareholders of Sinovac
Comprehensive income (loss)
Less: comprehensive (income) loss attributable to non-controlling 

interests

Comprehensive income (loss) attributable to shareholders of Sinovac
Weighted average number of common shares outstanding
- basic
- diluted
Earnings (loss) per share

Year ended December 31,

2015

2014

2013

2012

2011

(in thousands except share and per share data)

$

67,414 $
18,425
48,989

62,932 $
15,476
47,456

37,436
(49)
9,490
26
(1,637)
45,266
3,723
(1,920)
1,155
73
3,031
(2,516)
515
(728)
(213)
(861)
(1,074)
(4,688)

34,166
329
10,934
74
(104)
45,399
2,057
(3,407)
2,684
1,312
2,646
(1,458)
1,188
(1,524)
(336)
(515)
(851)
(2,763)

71,774  $
20,505   
51,269   

33,611   
(504)  
8,128   
88   
-   
41,323   
9,946   
(3,031)  
2,167   
329   
9,411   
2,225   
11,636   
(1,266)  
10,370   
(2,928)  
7,442   
13,056   

49,167 $
17,208
31,959

32,222
(874)
16,775
663
(349)
48,437
(16,478)
(774)
2,365
(156)
(15,043)
884
(14,159)
(4,590)
(18,749)
3,896
(14,853)
(16,725)

56,842
20,973
35,869

22,998
(167)
7,760
452
(764)
30,279
5,590
(298)
1,395
130
6,817
(5,066)
1,751
(2,150)
(399)
(445)
(844)
3,240

$

(298)
(4,986) $

(207)
(2,970) $

(3,244)  
9,812  $ 

3,665
(13,060) $

(974)
2,266

56,313,927
56,313,927

55,681,076
56,114,202

55,301,276   
55,802,338   

54,926,440
54,926,440

54,608,919
55,077,996

Basic net income (loss) per share:
Continuing operations
Discontinued operations
Basic net income (loss) per share

Diluted net income (loss) per share:
Continuing operations
Discontinued operations
Diluted net income (loss) per share

(0.01)
(0.01)
(0.02)

(0.01)
(0.01) 
(0.02) 

0.01
(0.03)
(0.02)

0.01
(0.03) 
(0.02) 

0.15   
(0.02)  
0.13   

0.15   
(0.02)  
0.13   

(0.19)
(0.08)
(0.27)

(0.19)
(0.08) 
(0.27) 

0.02
(0.04)
(0.02)

0.02
(0.04)
(0.02)

Weighted average number of shares of common stock outstanding
– Basic
– Diluted

56,313,927
56,313,927

55,681,076
56,114,202

55,301,276   
55,802,338   

54,926,440
54,926,440

54,608,919
55,077,996

  
  
  
  
  
  
  
  
  
  
  
  
 
    
    
    
 
    
    
 
    
    
 
 
 
    
    
Supplemental information(2)
Non-GAAP EBITDA
Non-GAAP net income (loss) from continuing operations
Non-GAAP Diluted EPS from continuing operations

11,185
2,353
0.03

10,440
2,094
0.03

16,635   
11,267   
0.15   

(12,155)
(14,055)
  (0.18)

10,305
2,000
0.03

(1) Includes  stock-based  compensation  of  $1.0  million,  $0.3  million,  $0.3  million,  $0.3  million  and  $0.2  million  in  2015,  2014,  2013,  2012  and  2011,

respectively.

(2) See “Non-GAAP Measures” below.

2

  
  
    
 
 
Non-GAAP Measures 

We  use non-GAAP EBITDA,  non-GAAP  net  income  from continuing operations  and  non-GAAP  diluted  EPS  from  continuing operations,  in  evaluating  our
operating results and for financial and operational decision-making purposes. 

We believe that non-GAAP EBITDA, non-GAAP net income from continuing operations and non-GAAP diluted EPS from continuing operations help identify
underlying trends in our business that could otherwise be distorted by the effect of certain income or expenses that we include in income from operations from
continuing operations, net income from continuing operations and diluted EPS from continuing operations. We believe that non-GAAP EBITDA, non-GAAP
net  income  from  continuing  operations  and  non-GAAP  diluted  EPS  from  continuing  operations  provide  useful  information  about  our  core  operating  results,
enhance the overall understanding of our past performance and future prospects and allow for greater visibility with respect to key metrics used by management
in our financial and operational decision-making. 

Non-GAAP EBITDA, non-GAAP net income from continuing operations and non-GAAP diluted EPS from continuing operations should not be considered in
isolation  or  construed  as  an  alternative  to  income  from  operations  from  continuing  operations,  net  income  from  continuing  operations,  diluted  EPS  from
continuing operations, or any other measure of performance or as an indicator of our operating performance. These non-GAAP financial measures presented
here may not be comparable to similarly titled measures presented by other companies. Other companies may calculate similarly titled measures differently,
limiting their usefulness as comparative measures to our data. 

3

  
  
  
  
  
  
 
Non-GAAP  EBITDA  represents  income  (loss)  from  continuing  operations,  excludes  interest  and  financing  expenses,  interest  income,  net  other  income
(expenses) and income tax benefit (expenses), and certain non-cash expenses, consisting of stock-based compensation expenses, amortization and depreciation
that we do not believe are reflective of our core operating performance during the periods presented. 

Non-GAAP  net  income  from  continuing  operations  represents  net  income  from  continuing  operations  before  stock-based  compensation  expenses,  and
foreign exchange gain or loss. 

Non-GAAP  diluted  EPS  from  continuing  operations  represents  non-GAAP  net  income  attributable  to  ordinary  shareholders  from  continuing  operations
divided  by  the  weighted  average  number  of  shares  outstanding  during  the  periods  on  a  diluted  basis,  including  accounting  for  the  effect  of  the  assumed
conversion of options. 

The table below sets forth a reconciliation of our income (loss) from continuing operations to non-GAAP EBITDA for the periods indicated: 

Income (loss) from continuing operations

Adjustments:

Stock-based compensation
Depreciation and amortization
Interest and financing expenses, net of interest income
Net other (income) expense
Income tax (benefit) expense

Non-GAAP EBITDA

2015

Year ended December 31,
2013

2014

2012

2011

515

$

1,188

$

11,636    $

(14,159) $

1,751

952
6,510
765
(73)
2,516
11,185

$

287
8,096
723
(1,312)
1,458
10,440

$

281     
6,408     
864     
(329)    
(2,225)    
16,635    $

347
3,976
(1,591)
156
(884)
(12,155) $

206
4,509
(1,097)
(130)
5,066
10,305

$

$

The  following  table  sets  forth  a  reconciliation  of  our  net  income  from  continuing  operations  to  non-GAAP  net  income  from  continuing  operations  for  the
periods indicated: 

Income (loss) from continuing operations
Add: Foreign exchange loss (gain)
Add: Stock-based compensation
Non-GAAP net income (loss) from continuing operations

$

$

515
886
952
2,353

$

$

2015

2014

Year ended December 31,
2013
(in thousands)
$

1,188
619
287
2,094

$

11,636    $
(650)    
281     
11,267    $

2012

2011

(14,159) $
(243)
347
(14,055) $

1,751
43
206
2,000

The  following  table  sets  forth  a  reconciliation  of  our  diluted  EPS  from  continuing  operations  to  non-GAAP  diluted  EPS  from  continuing  operations  for  the
periods indicated: 

4

  
  
  
  
  
  
  
  
  
  
 
 
   
      
 
 
   
 
 
2015

2014

Year ended December 31,
2013
(in thousands)

2012

2011

Net income (loss) from continuing operations attributable to 

shareholders of Sinovac

$
Add: Non-GAAP adjustments to net income from continuing operations(1) $
Non-GAAP net income (loss) attributable to shareholders of Sinovac 

(346) $
$
1,838

673
906

from continuing operations for computing non-GAAP diluted 
earnings (loss) per share

Weighted average number of shares on a diluted basis
Diluted earnings (loss) per share from continuing operations (2)
Add: Non-GAAP adjustments to net income per share from continuing 

operations (3)

Non-GAAP Diluted earnings (loss) per share from continuing 

operations (4)

$

$

$

$

1,492

$

1,579

56,313,927

(0.01) $

55,681,076
0.01

0.04

0.03

$

$

0.02

0.03

$
$

$

$

$

$

8,708    $
(369)   $

(10,263) $
$
104

1,306
249

8,339    $

(10,159) $

1,555

55,802,338      54,926,440

0.15    $

(0.19) $

54,608,919
0.02

0.00    $

0.01

$

0.15    $

(0.18) $

0.01

0.03

(1) See  the  table  above  about  the  reconciliation  of  net  income  from  continuing  operations  to  non-GAAP  net  income  from  continuing  operations  for  more

information on these non-GAAP adjustments.

(2) Diluted EPS from continuing operations is derived from net income attributable to ordinary shareholders from continuing operations for computing diluted

EPS divided by weighted average number of shares on a diluted basis.

(3) Non-GAAP  adjustments  to  net  income  per  share  from  continuing  operations  is  derived  from  non-GAAP  adjustments  to  net  income  from  continuing

operations divided by weighted average number of shares on a diluted basis.

(4) Non-GAAP  diluted  EPS  from  continuing  operations  is  derived  from  non-GAAP  net  income  attributable  to  ordinary  shareholders  from  continuing

operations for computing non-GAAP diluted EPS from continuing operations divided by weighted average number of shares on a diluted basis.

Balance sheet data

Cash and cash equivalents(1)
Total assets
Short-term bank loans and current portion of long-term debt
Total current liabilities
Long term debt (include due to related party)
Net assets
Non-controlling interests
Common stock
Total shareholders’ equity

2015

2014

$

$

63,834
202,984
21,775
58,001
756
138,741
15,461
57
123,280

$

$

91,293
238,530
47,375
79,834
1,803
141,726
15,162
56
126,564

$

2012

2011

91,219
208,763
3,210
30,155
31,300
129,435
11,711
55
117,724

$

$

103,780
215,908
4,713
39,531
17,321
145,297
15,377
55
129,920

106,517    $
240,693     
16,217     
49,157     
32,146     
143,639     
14,955     
56     
128,684    $

As of December 31,
2013
(in thousands)
$

(1) In  December  2015,  we  committed  to  a  plan  to  sell  100%  stake  in  Tangshan  Yian  Biological  Engineering  Co.,  Ltd.,  or  Tangshan  Yian.  The  assets  and

liabilities of Tangshan Yian are presented as held for sale as of December 31, 2015 and all comparative periods.

B. Capitalization and Indebtedness

Not applicable. 

C. Reasons for the Offer and Use of Proceeds

Not applicable. 

5

  
  
  
  
  
  
  
  
  
  
 
 
   
 
 
      
 
   
 
 
 
D. Risk Factors

Risks Related to Our Company 

Our  business  growth  relies  on  our  ability  to  react  to  infectious  disease  threats  and  to  continually  introduce  new  vaccine  products  into  the  commercial
market. Our failure to effectively develop and commercialize new products could materially and adversely affect our business, financial condition, results of
operations and prospects. 

The biopharmaceutical market in general and the vaccine product market in particular are developing rapidly as a result of ongoing infectious disease threats
and  new  trends  in  the  related  research  and  technology  developments.  Consequently,  our  success  depends  on  our  ability  to  react  to  disease  and  technology
development  trends  and  to  identify,  develop  and  commercialize  in  a  timely  and  cost-effective  manner  effective  vaccine  products  that  meet  evolving  market
needs. 

Whether we are successful in developing and commercializing new products is determined by our ability to: 



accurately assess disease and technology trends and market needs;

 maintain strong research and development capabilities;



optimize our manufacturing and procurement processes to predict and control costs;

 manufacture and deliver products with good quality in a timely manner and in sufficient quantities;



increase customer awareness and acceptance of our products;

 minimize the time and cost required to obtain required regulatory clearances and approvals;









anticipate and compete effectively with other vaccine product developers, manufacturers and marketers;

price our products competitively;

comply with the guidelines of Good Manufacturing Practice, or GMP, and other related regulations; and

thoroughly understand the frequently developing regulatory guidelines and regulations on vaccine products and comply with the regulations and guidelines
accordingly.

We incurred a loss in 2015 as well as in the past years, and may incur losses again in the future. 

Biopharmaceutical product development is a highly speculative undertaking and involves a substantial degree of risk. We have incurred substantial losses since
our inception. Although we first became profitable for the year ended December 31, 2007 and were profitable from 2007 through 2009, we incurred losses in
2010, 2011 and 2012. Although we were profitable in 2013, we incurred a loss again in 2014 and 2015. We cannot assure you when we will be profitable again
in the future. We had net income attributable to shareholders of $7.4 million in 2013 and incurred net loss attributable to shareholders of $0.9 million and $1.1
million in 2014 and 2015, respectively. Our profit in 2013 was partly driven by the recognition of H5N1 vaccine governmental stockpiling revenue of $10.7
million, which will not happen every year. In 2014, the loss was caused by less revenue and higher research and development expenses. In 2015, the loss was
caused by the depreciation of RMB against the U.S. dollar and stock-based compensation related to options and restricted shares granted to management and
employees in May 2015. None of the research and development expenses incurred were capitalized in our financial statements. We intend to continue to invest
in research  and development to sustain our long-term growth. We expect our research and development expenses to fluctuate depending on the progress we
make on each project, with relatively more spending on clinical studies than preclinical studies. We expect that our spending on research and development will
have a negative impact on our future net earnings. As a result, we may incur losses in the future, which will have an adverse impact on our working capital, total
assets, shareholders’ equity and cash flow. 

6

  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
We  distribute  vaccines  product  in  China  through  Centers  for  Disease  Control,  or  CDCs,  which  are  PRC  government  agencies.  This  exposes  us  to  risks
relating to doing business with the government. 

We  sell  our  vaccines  to  CDCs,  which  are  PRC  government  agencies.  Our  sales  to  PRC  government  agencies  expose  us  to  various  risks  relating  to  doing
business with the government. Demand and ability to pay for our products may be affected by government budgetary cycles, shifting availability of public funds
and changes in policy. Funding reductions, delays in payment or unilateral demands for changes to the terms of our contracts by our government customers
could  adversely  impact  our  results  of  operations  and  financial  condition,  exacerbate  the  existing  seasonality  of  our  revenues  and  make  it  difficult  for  us  to
allocate  resources  or  anticipate  demand  for  our  products.  More  importantly,  we  have  little  or  no  control  over  government  procurement  decisions,  and
government agencies that contract to purchase our products may reduce or cancel orders, or demand price adjustments or other changes to their contracts with us
without our consent. Changes in the personnel of the PRC government agencies that purchase our products may result in changes or delays to or cancellations of
purchase commitments due to, among others, differing policy and budgetary agendas of the personnel involved. Similar changes could occur if CDC or other
relevant government agency were to be consolidated with another ministry. Any of the above mentioned actions taken by government agencies could have a
material adverse effect on our results of operations and expected earnings, or result in our failure to meet, or having to adjust downwards, our sales and gross
margin guidance or estimates, which could adversely affect our stock price and result in substantial losses to you. In addition, many of the remedies that are
available to us when dealing with private parties, such as making claims for breach of contract or taking other legal actions, may not be available or practicable
in our dealings with government agencies. 

We currently have limited revenue sources. A reduction in revenues from sales of Healive, Bilive or Anflu would cause our revenues to decline and could
materially harm our business. 

We  generate  all  of  our  revenues  from  sales  of  our  vaccine  products.  We  derive  a  substantial  percentage  of  our  revenues  from  a  small  number  of  vaccine
products. In 2015, 2014 and 2013, 39.8%, 42.1% and 36.8%, respectively, of our revenues were from sales of Healive; 33.5%, 34.9% and 29.0%, respectively,
of  our  revenues  were  from  sales  of  Bilive;  18.8%,  19.3%  and  16.9%,  respectively,  of  our  revenues  were  from  sales  of  Anflu;  and  5.7%,  0.3%  and  15.0%,
respectively,  of  our  revenues  were  from  sales  of  Panflu  (H5N1).  However,  revenue  recognition  of  Panflu  (H5N1)  is  not  recurring  due  to  its  government
stockpile nature, which may cause fluctuation of our revenue. As a result of this relative lack of product diversification, an investment in our company would be
more risky than investments in companies that offer a wide variety of products or services. 

We have already started the commercial production of Enterovirus 71, or EV71, vaccine in 2016, which is estimated to be launched to the market by the end of
the first half of 2016. EV71 vaccine will also serve as one of our core products in the following years. 

We expect our key products, which will likely shift over time, to continue to account for a significant portion of our net revenues for the foreseeable future. As a
result,  continued  market  acceptance  and  popularity  of  these  products  are  critical  to  our  success  and  a  reduction  in  demand  due  to,  among  other  factors,  the
introduction  of  competing  products  by  our  competitors,  the  entry  of  new  competitors,  or  end-users’  dissatisfaction  with  the  quality  of  our  products,  could
materially and adversely affect our financial condition and results of operations. 

We  could  be  subject  to  costly  and  time-consuming  product  liability  actions  and,  because  our  insurance  coverage  is  limited,  our  exposure  to  such  claims
could cause significant financial burden. 

Our  business  exposes  us  to  potential  product  liability  risks  that  are  inherent  in  the  testing,  manufacturing  and  marketing  of  biopharmaceutical  products.  We
manufacture vaccines that are injected into people to protect against infectious illnesses. If our products do not function as anticipated, whether as a result of
flaws in our design, unanticipated health consequences or side effects, misuse or mishandling by third parties, or faulty or contaminated supplies, they could
harm the vaccinees and, as a result, subject us to product liability lawsuits. Claims against us also could be based on failure to immunize as anticipated. Any
product liability claim brought against us, with or without merit, could have a material adverse effect on us. Meritless and unsuccessful product liability claims
can  be  time-consuming,  expensive  to  defend  and  could  result  in  the  diversion  of  management’s  attention  from  managing  our  core  business  or  result  in
associated negative publicity. 

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The successful assertion of product liability claims against us could require us to pay significant monetary damages. Although we currently carry worldwide
product liability insurance for Healive, Bilive, Anflu, Panflu and EV71 vaccine (excluding U.S. and Europe), we cannot assure you that such coverage will be
sufficient to cover any liabilities resulting from successful product liability claims. In such a case, we may be required to make substantial payments to cover
any losses, damages or liabilities arising from product liability claims. For any amounts covered by insurance, there remains the risk that foreign exchange or
other regulatory restrictions may prevent the use of insurance proceeds to meet the liabilities. In addition, we do not have or plan to procure clinical trial liability
insurance for our clinical trials to mitigate any unsuccessful clinical trial expenses or product liability claims arising therefrom. Any of these factors could have
a material adverse effect on our business, financial condition and results of operations. 

Any pandemic threat may abate, or alternative vaccines or technologies may be adopted, before our vaccines achieve significant sales. 

We have devoted significant resources to researching and developing various vaccines to address the pandemic threat of infectious diseases, including SARS,
avian flu and swine flu, and will continue to devote resources to the development of our vaccines to address any new needs. 

However,  the  threat  of  a  pandemic  outbreak  may  subside  before  we  realize  any  return  on  our  investment  in  our  research  and  development.  For  example,
although we believe we were the first company to complete a phase I clinical trial of an inactivated SARS vaccine in December 2004, we did not proceed with
the  phase  II  and  phase III  trials  as  the  SARS  epidemic  subsequently  subsided.  Other  organizations  may  obtain  licenses  for  their  own  pandemic  vaccines,  or
government health organizations may acquire adequate stockpiles of pandemic vaccine or adopt other technologies or strategies to prevent or limit outbreaks
before our pandemic vaccines achieve significant sales. We may not achieve a return on our investment before the threat of a pandemic outbreak subsides or a
competing product is adopted. 

Failure to achieve and maintain effective internal controls could have a material adverse effect on our business, results of operations and the trading price
of our common shares. 

We  are  subject  to  the  reporting  obligations  under  U.S.  securities  laws.  Section  404  of  the  Sarbanes-Oxley  Act  of  2002  and  related  rules  require  public
companies to include a report of management on their internal control over financial reporting in their annual reports. This report must contain an assessment by
management of the effectiveness of a public company’s internal control over financial reporting. In addition, an independent registered public accounting firm
for a public company must attest to and report on the effectiveness of our internal control over financial reporting. 

Our management has concluded that our internal control over financial reporting is effective as of December 31, 2015. See “Item 15. Controls and Procedures.”
Our  independent  registered  public  accounting  firm  has  issued  an  attestation  report  on  our  internal  control  over  financial  reporting, which  concludes  that  our
internal  control  over  financial  reporting  is  effective  in  all  material  aspects.  However,  we  cannot  assure  you  that  any  material  weakness  or  deficiency  in  our
internal control over financial reporting will not be identified in the future. We may not always be able to maintain an effective internal control over financial
reporting. If we fail to maintain effective internal control over financial reporting in the future, we and our independent registered public accounting firm may
not be able to conclude that we have effective internal control over financial reporting at a reasonable assurance level. This could in turn result in the loss of
investor confidence in the reliability of our financial statements and negatively impact the trading price of our common shares, inhibiting our ability to raise
sufficient  capital  on  favorable  terms.  Furthermore,  we  have  incurred  and  anticipate  that  we  will  continue  to  incur  considerable  costs  and  to  use  significant
management time and other resources in an effort to comply with Section 404 and other requirements of the Sarbanes-Oxley Act. 

If we are unable to successfully compete in the highly competitive biopharmaceutical industry, our business could be harmed. 

We operate in a highly competitive environment and we expect the competition to increase further in the future. Our competitors include large pharmaceutical
and biotechnology companies, both domestic and international. Many of these competitors have greater resources than us. New competitors may also enter into
the  markets  in  which  we  currently  compete.  Accordingly,  even  if  we  are  successful  in  launching  a  product,  we  may  not  be  able  to  outperform  a  competing
product for any number of reasons, including the possibility that the competitor may: 

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have launched its competing product first or the competing product may have, or be perceived as having, better efficacy, stronger brand recognition, or
other advantages;

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have better access to certain raw materials;

have more efficient manufacturing processes and greater manufacturing capacity;

have greater marketing capabilities;

have greater pricing flexibility;

have more extensive research and development and technical capabilities;

have proprietary patent portfolios or other intellectual property rights that may present an obstacle to our conduct of business;

have greater knowledge of local market conditions where we seek to increase our international sales;

have capability to maintain a competitive management team; or

have investment capability to acquire businesses when the opportunity is not available to us.

The  technologies  applied  by  our  competitors  and  us  are  rapidly  evolving,  and  new  developments  frequently  result  in  price  competition  and  product
obsolescence. In addition, we may be impacted by competition from generic forms of our products, substitute products or imports of products from lower-priced
markets.  For  a  detailed  description  of  our  competitors  in  hepatitis  A  vaccines,  hepatitis  A  and  B  vaccines  and  influenza  vaccines,  please  see  “Item  4.
Information on the Company — B. Business Overview — Competition.” 

We may not be successful in commercializing our EV71 vaccine. 

Our EV71 vaccine was approved for commercialization in China. We obtained the new drug certificate and production license for our proprietary EV71 vaccine
against EV71-associated HFMD from China Food and Drug Administration, or CFDA, on December 30, 2015. CFDA issued the GMP certificate in January
2016. We started the commercial production of our EV71 vaccine immediately and expect to deliver the vaccine to the market in the second quarter of 2016
after  the  lot  release  testing  is  completed.  However,  there  are  still  risks  in  the  commercialization  of  EV71  vaccine.  Unsuccessful  lot  release  and  competitive
pricing  pressures  may  limit  or  prevent  the  success  of  the  product  on  the  market.  For  example,  our  competitors  launched  a  similar  products  or  the  PRC
government  may  grant  compulsory  licenses  to  allow  competitors  to  manufacture  our  EV71  vaccine.  State-owned  competitors  may  not  act  rationally  as
commercial entities, and we may be forced to follow their pricing to the low end of the range. Furthermore, if the PRC government were to include our EV71
vaccine in the Expanded Program on Immunization, or EPI, earlier than we expect, purchase made by the government could affect our anticipated revenue. Any
of these factors, together with other risks, including changes in the regulatory environment, supply issues, product liability claims and failure to win over our
competitors, may result in our inability to successfully commercialize our EV71 vaccine in China, which would materially and adversely affect our business,
financial condition and results of operations. 

We may not be able to maintain market share in China with our commercialized vaccines, which could adversely affect our ability to increase our revenues. 

Our market share is estimated based on the batch release number for 2015 (as of December 31, 2015) published by the National Institutes for Food and Drug
Control, or NIFDC, which represents the market share estimated based on published supply quantity, but not the actual sales number in the market. We supplied
16.9%, 21.0% and 15.5% of the total hepatitis A vaccine market, or 89.8%, 72.7% and 44.6% of the inactivated hepatitis A vaccine market in 2015, 2014 and
2013, respectively, as measured by lot release number. Going forward, we may not be able to compete with other hepatitis A suppliers for either the private-pay
market or public market, which could adversely affect our ability to increase our revenues from hepatitis A vaccine. 

We have been marketing and selling seasonal flu vaccines since 2006. Our market share, in terms of lot release numbers, was 10.9% in 2015, 9.5% in 2014 and
11.3%  in  2013.  The  flu  vaccine  market  in  China  is  highly  competitive.  Multinational  companies  are  increasing  investment  in  localized  flu  vaccine
manufacturing plants. Our revenue growth could be adversely impacted if we are not able to maintain our market share in this highly competitive market. 

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We may not be able to maintain market share in the government-funded hepatitis A vaccine market, or other government-funded vaccine markets, which
could adversely affect our revenues, and if we do maintain or expand market share in these markets, we may need to sell our vaccines at a lower price,
which could adversely affect our gross margin. 

Hepatitis A vaccines have been included in the EPI in China since 2007. The PRC government purchases hepatitis A vaccines for each 18-month-old child. 

Although the hepatitis A vaccines have been included in the EPI, most provincial and municipal governments are not able to afford the two shots of inactivated
hepatitis A vaccines due to insufficient financial support, which constrains the purchase of inactivated hepatitis A vaccines in government-funded markets. Most
provincial  and  municipal  governments  prefer  to  purchase  the  lower-priced  live  attenuated  hepatitis  A  vaccines;  however,  a  few  affluent  provincial  and
municipal governments, such as Beijing, Tianjin, Shanghai and Jiangsu province, have started to purchase inactivated hepatitis A vaccines. We are supplying
vaccines in these markets at a lower price than we do in the private market, which could adversely affect our gross margin. In addition, we also face competition
from peers who will launch hepatitis A pre-filled syringe in 2016. Our revenue could be adversely impacted if we are not able to maintain our market share of
the government-funded markets in these cities and provinces. As we are making efforts to breakthrough into additional provincial and municipal public markets,
we may be forced to further lower our price to win the tender, which will adversely affect our gross margin. 

Since 2007, we have been selected as one of the suppliers by Beijing CDC to supply seasonal influenza vaccines to Beijing citizens. We cannot assure you that
we will continue to obtain orders in the future and maintain the current market share. If the supply volume continues to decrease, it would negatively impact our
sales revenue in the future. 

Since 2008, we have received three stockpiling orders for our H5N1 vaccine from China’s central government every two years with the amount of three million
doses per order, and three stockpiling orders from Beijing government with the amount of 20,000 doses per order. The latest batch of stockpiled H5N1 vaccines
will expire in the first half of 2016 and we will recognize the revenue upon the government inspection. We cannot assure you that we will continue to receive
additional stockpiling orders from governments in the future. 

If CDCs, hospitals, physicians and vaccinees do not accept our products, we may be unable to generate significant revenue. 

Even if we have obtained the regulatory approval for commercialization of our vaccines, they still may not gain market acceptance among CDCs, hospitals,
physicians,  vaccinees  and  the  medical  community,  which  would  limit  our  ability  to  generate  revenue  and  adversely  affect  our  results  of  operations.  CDCs,
hospitals  and  physicians  may  not  recommend  products  developed  by  us  or  our  collaborators  until  clinical  data  or  other  factors  demonstrate  superior  or
comparable safety and efficacy of our products as compared to other available treatments. Even if the clinical safety and efficacy of our products are established,
CDCs,  hospitals  and  physicians  may  elect  not  to  recommend  these  products  for  a  variety  of  reasons.  There  are  other  vaccines  and  treatment  options  for  the
conditions that many of our products and product candidates target, such as hepatitis A and B and influenza. In order to successfully launch a product, we must
educate  physicians  and  vaccinees  about  the  relative  benefits  of  our  products.  If  our  products  are  not  perceived  as  easy  and  convenient  to  use,  perceived  to
present a greater risk of side effects or are not perceived to be as effective as other available treatments, CDCs, hospitals, physicians and vaccinees might not
adopt  our  products.  A  failure  of  our  products  to  gain  commercial  acceptance  would  have  a  material  adverse  effect  on  our  business,  financial  condition  and
results of operations. 

We may not achieve the expected return on our investment in Sinovac (Dalian) Vaccine Technology Co., Ltd., or Sinovac Dalian. 

We have  invested significant resources  into Sinovac  Dalian  since its establishment in 2010. However, we cannot assure you that Sinovac Dalian’s business,
covering the research, development, manufacturing and commercialization of vaccines, such as mumps and varicella, will be successful or that we will not incur
any  related  impairment  charges  in  the  future.  Any  failure  to  achieve  the  expected  return  on  our  investment  in  Sinovac  Dalian  may  materially  and  adversely
affect our business, financial condition and results of operations. 

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Our  growth  may  be  adversely  affected  if  market  demand  for  our  vaccine  products  and  product  candidates  does  not  meet  our  expectations.  We  may
encounter problems of inadequate supply or oversupply, which would materially and adversely affect our financial condition and results of operations and
would also damage our reputation and brand. 

Our  growth  may  be  adversely  affected  if market  demands  for our  vaccine  products  and  product candidates do  not meet  our expectations.  The  production  of
vaccine products is a lengthy and complex process. As a result, our inability to match our production to market demand may result in a failure to meet market
demand, which could materially and adversely affect our financial condition and results of operations and could also damage our reputation and corporate brand.
For example, many vaccinees receive their seasonal flu vaccinations in the three-month period from September to November in anticipation of an upcoming flu
season and we expect this period to be one of the most significant sales periods for this product each year. In anticipation of the flu season, we intend to build up
inventory of our Anflu product in line with what we believe will be the anticipated demand for the product. If actual demand does not meet our expectations, we
may be required to write off significant inventory and may otherwise experience adverse consequences in our financial condition. If we overestimate demand,
we may purchase more raw materials than required. If we underestimate demand, our third-party suppliers may have inadequate raw material inventories, which
could interrupt our manufacturing, delay shipments and result in lost sales. 

If  we  are  unable  to  enroll  sufficient  vaccinees  and  identify  clinical  investigators  for  our  clinical  trials,  our  development  programs  could  be  delayed  or
terminated. 

The rate of completion of our clinical trials is significantly dependent upon the rate of enrollment of volunteers. Vaccinees enrollment is a function of many
factors, including: 

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efforts of the sponsor and clinical sites involved to facilitate timely enrollment;

vaccinee referral practices of physicians;

design of the protocol;

eligibility criteria for the study in question;

perceived risks and benefits of the drug under study;

the size of the vaccinee population;

availability of competing therapies;

availability of clinical trial sites; and

proximity of and access by vaccinees to clinical sites.

We may have difficulty in obtaining sufficient volunteer subjects enrollment or finding qualified investigators to conduct our clinical trials as planned and we
may need to expend substantial funds to obtain access to resources or delay or modify our plans significantly. These considerations may lead us to consider the
termination of development of a product for a particular indication. 

A setback in any of our clinical trials could adversely affect our share price. 

We obtained the approval to conduct clinical trials for our pneumococcal polysaccharide vaccine, varicella vaccine and sabin-inactivated polio vaccine, or sIPV
vaccine, in May 2014, October 2015 and December 2015, respectively. We started clinical trials for pneumococcal polysaccharide vaccine at the beginning of
April 2015. Setbacks in any phase of the clinical trials of our product candidates could have a material adverse effect on our business and our future prospects
and financial results and would likely  cause a decline  in  the price  of our common  shares. We may  not  achieve our  projected development goals in the time
frames we announce and expect. If we fail to achieve one or more milestones as contemplated, the market price of our common shares could decline. 

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We  set  goals  for  and  make  public  statements  regarding  our  anticipated  timing  of  the  accomplishment  of  objectives  material  to  our  success,  such  as  the
commencement and completion of clinical trials and other milestones. The actual timing of these events can vary significantly due to factors such as delays or
failures  in  our  clinical  trials,  the  uncertainties  inherent  in the  regulatory  approval process  and  delays  in  achieving  manufacturing  or  marketing  arrangements
sufficient to commercialize our products. We may not complete our clinical trials or make regulatory submissions or receive regulatory approvals as planned.
Also, we may not be able to adhere to our currently anticipated schedule for the launch of any of our products. If we fail to achieve one or more milestones as
contemplated, the market price of our shares could decline. 

We rely on third parties to conduct clinical trials, who may not perform their duties satisfactorily. 

After  we  obtain  approval  to  conduct  clinical  trials  for  our  product  candidates,  we  rely  on  qualified  research  organizations,  medical  institutions  and  clinical
investigators to enroll qualified vaccinees and conduct clinical trials. Our reliance on these third parties for clinical development activities reduces our control
over the clinical trial process. Furthermore, these third parties may also have relationships with other entities, some of which may be our competitors. If these
third parties do not fulfill their contractual obligations, including failing to meet expected deadlines, we may not succeed or may experience delays in our efforts
to obtain regulatory approvals and commercialize our vaccine candidates. 

If any of our third-party suppliers or manufacturers cannot adequately meet our needs, our business could be harmed. 

While we use raw materials and other key material supplies that are generally available from multiple commercial sources, certain raw materials that we use to
cultivate our influenza vaccines, such as embryonated eggs, are in short supply or difficult for suppliers to produce in accordance with our specifications. If the
third-party suppliers were to cease production or otherwise fail to supply us with quality raw materials, and if we were unable to contract on acceptable terms
for these materials with alternative suppliers, our ability to deliver our products to the market would be adversely affected. 

In addition, if we fail to secure long-term supply sources for some of the raw materials we use, our business could be harmed. For example, we do not have a
long-term agreement for the supply of hepatitis B antigens used for Bilive production. We source hepatitis B antigens entirely from Beijing Temple of Heaven
Biological  Products  Co.,  Ltd.,  or  Beijing  Temple  of  Heaven.  Although  we  are  developing  our  own  hepatitis  B  vaccine,  before  it  is  approved  to  be
commercialized,  we  have  to  rely  on  the  supplier  to  receive  hepatitis  B  antigen.  We  and  Beijing  Temple  of  Heaven  agreed  to  enter  into  annual  hepatitis  B
antigens supply agreements after our previous ten-year exclusive supply framework agreement expired in October 2012. Beijing Temple of Heaven supplied
hepatitis  B  antigens  to  us  from  July  2013  to  June  2015  based  on  the  annual  supply  agreement.  Thereafter,  Beijing  Temple  of  Heaven  ceased  its  hepatitis  B
antigens production due to facilities renovation until 2017. To ensure sufficient storage, we procured an abundant amount of hepatitis B antigens from Beijing
Temple of Heaven and produced a significant amount of Bilive in 2015. Although we are confident that we can maintain sufficient supply of Bilive until Beijing
Temple  of  Heaven  resumed  its  production  of  hepatitis  B  antigens,  we  cannot  assure  you  that  Beijing  Temple  of  Heaven  will  not,  for  any  reason,  delay  its
renovation schedule and cease to supply us with hepatitis B antigens in the future, in which case our business, financial condition and results of operations may
be materially and adversely affected. 

From time to time, concerns are raised with respect to potential contamination of biological materials that are supplied to us. These concerns can further tighten
market conditions for materials that may be in short supply or available from limited sources. Moreover, regulatory approvals to market our products may be
conditioned  upon  obtaining  certain  materials  from  specified  sources.  Any  efforts  to  substitute  material  from  an  alternate  source  may  be  delayed  by  pending
regulatory approval of such alternate source. Although we work to mitigate the risks associated with relying on sole suppliers, there is a possibility that material
shortages could impact product development and production. 

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Our business is highly seasonal. This seasonality will contribute to our operating results fluctuating considerably throughout the year. 

Our business is highly seasonal. For example, the influenza season generally runs from November through March of the next year and the largest percentage of
influenza vaccinations is administered between September and November of each year. As a result, we expect to realize most of our annual revenues from Anflu
during this period. This seasonality in our business is expected to contribute to significant quarterly fluctuations in our operating results. 

We rely on a limited number of facilities for the manufacturing of our products in accordance with relevant regulatory requirements. Any disruption to our
existing manufacturing facilities or in the development of new facilities could reduce or restrict our sales and harm our reputation. 

According to the China GMP guidelines, each vaccine products can only be produced in one dedicated production facility. In Beijing, we conduct the primary
production  of  each  vaccine  in  its  dedicated  production  plant  at  our  Shangdi  site  and  secondary  filling  and  packaging  at  our  Changping  site.  In  Dalian,  we
manufacture mumps vaccine at one facility. We also conduct some of our primary research and development activities out of our manufacturing facilities. We
do not maintain back-up facilities for our currently available products, so we are dependent on our existing facilities for the continued operation of our business.
A  natural  disaster  or  other  unanticipated  catastrophic  events,  including  power  interruptions,  water  shortages,  storms,  fires,  earthquakes  and  terrorist  attacks,
could significantly impair our ability to manufacture our products and operate our business and could also delay our research and development activities. Our
facilities and certain equipment located in these facilities would be difficult to replace and could require substantial replacement lead-time. Catastrophic events
may also destroy any inventory located in our facilities. We do not maintain any business interruption insurance to cover lost income as a result of any such
events. The occurrence of such events could materially and adversely affect our business. We may build additional manufacturing facilities in the future. There
can be no assurance, however, that we will be able to expand our manufacturing capabilities to or realize the anticipated benefits of our new facilities. Any of
these factors could reduce or restrict our sales, harm our reputation and have a material adverse effect on our business, financial condition, results of operations
and prospects. 

We will need additional capital to upgrade the production plant for our existing products or expand the facility, to continue development of our product
pipeline and to market existing and future products on a large scale. We cannot guarantee that we will find adequate sources of capital in the future. 

We closed a public offering of our common shares on February 2, 2010, and received net proceeds of approximately $61.8 million, after deducting underwriting
discounts  and  commissions  and  offering  expenses  payable  by  us.  We  have  invested  approximately  $16.4  million  in  incorporation  of  Sinovac  Dalian  and
invested $25.4 million in Beijing Sinovac R&D Technology Co. Ltd. or Sinovac R&D to conduct research and development and other operating activities of
operational  entity  in  PRC.  We  intend  to  use  the  remaining  net  proceeds  we  received  from  this  offering  for  the  research  and  development  of  our  product
candidates and other general corporate purposes. 

In the long run, we will need to raise additional funds to finance equipment expenditures, to acquire intellectual property, to expand the production facility for
our pipeline products, including pneumococcal polysaccharide vaccine and varicella vaccine, to continue the development and commercialization of our product
candidates and for other corporate purposes. As of December 31, 2015, we had approximately $63.8 million in cash and cash equivalents. Although we believe
that we have adequate near-term cash resources, we will need to undertake significant future financings in order to: 

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establish and expand manufacturing capabilities;

proceed with the research and development of other vaccine products, including clinical trials of new products;

commercialize our products, including the marketing and distribution of new and existing products;

seek and obtain regulatory approvals;

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develop or acquire directly, or indirectly through acquisition of companies, other product candidates or technologies or companies;

protect our intellectual property; and

finance general, administrative and research activities that are not related to specific products under development.

In the past, we funded most of our research and development and other expenditures through government grants, working capital, bank loans and proceeds from
private placements and public offering of our common shares. We may raise additional funds in the future because our current operating and capital resources
may be insufficient to meet future requirements. 

If we continue to raise additional funds by issuing equity securities, it will result in further dilution to our existing shareholders because the shares may be sold
at a time when the market price is low and shares issued in equity financing transactions will normally be sold at a discount to the current market price. Any
additional  equity  securities  issued  also  may  provide  for  rights,  preferences  or  privileges  senior  or  otherwise  preferential  to  those  of  holders  of  our  existing
common shares. Unforeseen problems including materially negative developments relating to, among other things, disease developments, product sales, new
product rollouts, clinical trials, research and development programs, our strategic relationships, our intellectual property, litigation, regulatory changes in our
industry,  the  Chinese  market  generally  or  general  economic  conditions,  could  interfere  with  our  ability  to  raise  additional  funds  or  materially  and  adversely
affect the terms upon which such funding is available. 

If  we  raise  additional  funds  by  issuing  debt  securities,  these  debt  securities  would  have  rights,  preferences  and  privileges  senior  to  those  of  holders  of  our
common  shares,  and  the  terms  of  the  debt  securities  issued  could  impose  significant  restrictions  on  our  operations.  If  we  raise  additional  funds  through
collaborations  and  licensing  arrangements,  we  might  be  required  to  relinquish  significant  rights  to  certain  of  our  technologies,  marketing  territories,  product
candidates or products that we would otherwise seek to develop or commercialize ourselves, or be required to grant licenses on terms that are not favorable to
us. In the past, we have also received different types of grants from the PRC government to finance the research and development and facility investment of our
vaccine products. We may not receive additional grants in the future. 

We do not know whether additional financing will be available to us on commercially acceptable terms when needed. If adequate funds are not available or are
not available on commercially acceptable terms, we may be unable to continue developing our products. In any such event, our ability to bring a product to
market  and  obtain  revenues  could  be  delayed  and  competitors  could  develop  products  sooner  than  we  do.  As  a  result,  our  business,  financial  condition  and
results of operations could be materially and adversely affected. 

The interests of the respective minority shareholders of Sinovac Biotech Co., Ltd., or Sinovac Beijing, and Sinovac Dalian may diverge from our own, which
may adversely affect our ability to manage these subsidiaries. 

Sinovac Beijing, our principal operating subsidiary, is a Sino-foreign equity joint venture in which we own a 73.09% interest and Sinobioway Bio-medicine Co.,
Ltd. (formerly named Xiamen Bioway Group Co., Ltd), or Sinobioway Medicine, owns a 26.91% interest. Sinobioway Medicine’s interests may not be aligned
with  our  interests  at  all  times.  We  cannot  assure  you  that  Sinobioway  Medicine  will  be  cooperative  with  us  in  handling  matters  related  to  the  operations  of
Sinovac Beijing. As the minority shareholder of Sinovac Beijing, according to Sinovac Beijing’s articles of association, Sinobioway Medicine has the right to
assign a director to the five-director board of Sinovac Beijing. Accordingly, they have the ability to take actions that bind Sinovac Beijing or to block any action
that  requires  unanimous  board  approval.  In  addition,  if  we  wish  to  transfer  our  equity  interest  in  Sinovac  Beijing,  in  whole  or  in  part,  to  a  third  party,
Sinobioway Medicine has a right of first refusal to purchase our interest in accordance with the relevant PRC regulations. 

In addition, Sinobioway Medicine, the minority shareholder of Sinovac Beijing, has additional rights under the joint venture contract and articles of association
of Sinovac Beijing. The joint venture contract and articles of association require the consent of each of Sinovac Beijing’s shareholders and/or unanimous board
approval on matters such as a major change in the business line of the company, expansion or amendment of the business scope of the company, transfer of the
registered  capital  by  a  shareholder,  creation  of  a  mortgage  or  pledge  upon  the  company’s  assets,  a  change  in  the  organizational  form  of  the  company  and
designation or removal of the general manager. 

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In November 2009, we entered into an agreement with Dalian Jin Gang Group to establish Sinovac Dalian. In January 2010, Sinovac Dalian was established to
focus  on  the  research,  development,  manufacturing  and  commercialization  of  vaccines,  such  as  mumps  and  varicella  for  human  use.  Pursuant  to  the  joint
venture  agreement,  we  made  the  initial  cash  contribution  of  RMB60.0  million  ($9.3  million)  in  exchange  for  a  30%  equity  interest  in  Sinovac  Dalian,  and
Dalian Jin Gang Group made an asset contribution of RMB140.0 million ($21.6 million), including the manufacturing facilities, production lines and land use
rights, in exchange for the remaining 70% interest in Sinovac Dalian. In December 2010, we purchased an additional 25% equity interest in Sinovac Dalian
from  Dalian  Jin  Gang  Group  with  a  consideration  of  RMB50.0  million  ($7.7  million).  We  and  Dalian  Jin  Gang  Group  currently  own  55%  and  45%  equity
interests in Sinovac Dalian, respectively. 

To  date,  Dalian  Jin  Gang  Group  has  been  cooperative  with  us  in  handling  matters  with  respect  to  the  business  of  Sinovac  Dalian.  We  cannot  assure  you,
however, that Dalian Jin Gang Group will continue to act in a cooperative manner in the future. 

Under  China’s  joint  venture  regulations,  the  unanimous  approval  of  members  of  a  joint  venture’s  board  of  directors  who  are  present  at  a  board  meeting  is
required for any amendment to the joint venture’s articles of association, the termination or dissolution of the joint venture company, an increase or decrease in
the  registered  capital  of  the  joint  venture  company  or  a  merger  or  de-merger  of  the  joint  venture.  If  our  interests  diverge  from  those  of  our  minority
shareholders, they may exercise their rights under PRC laws to protect their own interests, which may be adverse to ours. As a result, our ability to manage these
subsidiaries may be adversely affected, which in turn may materially and adversely affect our business, financial condition and results of operations. 

Some  of  the  predecessor  shareholders  of  Sinovac  Beijing  and  Tangshan  Yian  were  enterprises  owning  state-owned  assets,  or  EOSAs.  Their  failures  to
comply  with  PRC  legal  requirements  in  asset  or  share  transfers  could,  under  certain  circumstances,  result  in  such  transfers  being  invalidated  by
government  authorities.  If  this  occurs,  we  could  lose  our  ownership  of  intellectual  property  rights  that  are  vital  to  our  business  as  well  as  our  equity
ownership in Sinovac Beijing and Tangshan Yian. 

Sinovac Beijing is currently owned 73.09% by us and 26.91% by Sinobioway Medicine (formerly named Xiamen Bioway Group Co., Ltd). The technologies
related  to  hepatitis  A  vaccine,  hepatitis  A  and  B  vaccine  and  influenza  vaccine  that  are  vital  to  our  business  were  directly  or  indirectly  transferred  to  us  by
Tangshan  Yian.  Some  of  the  predecessor  shareholders  of  Sinovac  Beijing  and  Tangshan  Yian,  including  Shenzhen  Kexing  Biological  Engineering  Ltd.,  or
Shenzhen  Kexing,  Sinobioway  Medicine,  Tangshan  Medicine  Biotech  Co.,  Ltd.,  Tangshan  Yikang  Biotech  Co.,  Ltd.  and  Tangshan  Yian  itself  (as  Sinovac
Beijing’s former shareholder), were EOSAs. Under applicable PRC laws, when EOSAs sell, transfer or assign assets or equity investments in their possession or
under their control to third parties, they are required to obtain an independent appraisal of the transferred assets or shares and file such appraisal with or obtain
approval  of  such  appraisal  from  PRC  government  authorities.  Since  2004,  EOSAs  have  also  been  required  to  make  such  assets  or  equity  transfers  at
government-designated marketplaces. Our acquisitions of intellectual property rights and some equity interests were subject to these requirements. 

Tangshan Yian failed to file with the government authorities the appraisal of the hepatitis A vaccine technology that it transferred to Sinovac Beijing in 2001 as
its capital contribution to Sinovac Beijing. Under PRC laws, Tangshan Yian also failed to: 

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obtain  the  appraisal  of  the  hepatitis  A  and  B  vaccine  technology  that  it  transferred  for  no  consideration  to  Beijing  Keding  Investment  Co.,  Ltd.,  or
Beijing  Keding,  in  2002  (Beijing  Keding  subsequently  transferred  the  technology  to  Sinovac  Beijing  as  Beijing  Keding’s  capital  contribution  to
Sinovac Beijing) and to file such appraisal with the government authorities; and

obtain the appraisal of the influenza vaccine technology that it transferred to Sinovac Beijing in 2004 and to file such appraisal with the government
authorities.

These failures subject us to the risk of losing ownership or control of these vaccine technologies. 

In addition, before we acquired our 73.09% equity interest in Sinovac Beijing, it had undergone multiple changes in its shareholders and these shareholders’
shareholdings. Some of the EOSA shareholders of Sinovac Beijing have sold, transferred or assigned their respective equity interests in Sinovac Beijing without
fully complying with laws to appraise the equity interests, to file such appraisals with or obtain regulatory approval of such appraisals from PRC government
authorities or to make equity interest transfers at the government-designated marketplaces as required for transactions completed after 2004. Similar to the asset
transfers, such failures subject us to the risk of losing the ownership or control of our equity interest in Sinovac Beijing. 

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PRC  government  authorities  may  take  court  actions  to  invalidate  the  transfers  of  the  assets  or  equity  investments  discussed  above  for  non-compliance  with
applicable appraisal, filing, approval and designated marketplace requirements. We cannot guarantee that the government authorities will not take such legal
actions or that such legal actions, if commenced, will not be successful. If these transfers are invalidated, we would lose title to these assets and investments.
Because we depend on these technologies and because Sinovac Beijing constitutes core part of our operations, our loss of these technologies or equity interest in
Sinovac Beijing would materially and adversely affect our business operations and financial condition. 

There  can  be  no  assurance  that  the  going  private  transaction  will  be  successfully  consummated.  Potential  uncertainty  involving  the  going  private
transaction may adversely affect our business and the market price of our common shares. 

Our  board  of  directors  received  a  non-binding  proposal  letter,  dated  January  30,  2016,  from  Mr.  Weidong  Yin,  our  chairman,  president  and  chief  executive
officer, SAIF Partners IV L.P. and/or its affiliates, to acquire all of our outstanding common shares not owned by them or their affiliates for $6.18 in cash per
common share, subject to certain conditions. Following receipt of the proposal, our board of directors formed a special committee of independent directors to
consider  the  proposal.  The  special  committee  received  a  competing  non-binding  going  private  proposal  letter,  dated  February  3,  2016,  from  a  consortium
comprised of PKU V-Ming (Shanghai) Investment Holdings Co., Ltd., Shandong Sinobioway Biomedicine Co., Ltd., CICC Qianhai Development (Shenzhen)
Fund Management Co., Ltd., Beijing Sinobioway Group Co., Ltd., Heng Feng Investments (International) Limited and Fuerde Global Investment Limited, to
acquire our outstanding common shares for $7.00 in cash per common share, subject to certain conditions. The special committee will carefully consider and
evaluate  both  proposals  and  other  alternative  proposals  with  the  assistance  of  the  special  committee’s  independent  advisors  appointed.  The  going  private
transaction, whether or not consummated, presents a risk of diverting management focus, employee attention and resources from other strategic opportunities
and  from  operational  matters.  Potential  uncertainty  involving  the  going  private  transaction  may  adversely  affect  our  business  and  the  market  price  of  our
common shares. 

Our shareholder rights plan and certain provisions of our By-laws may discourage a change of control. 

In March 2016, we adopted a shareholder rights plan, or the “Rights Plan”, that provides for one right, or the Right, for each of our outstanding common shares.
The rights are designed to assure that all of our shareholders receive fair and equal treatment in the event of any proposed takeover and to guard against partial
tender  offers,  open  market  accumulations  and  other  abusive  or  coercive  tactics  to  gain  control  of  our  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 common shares on terms not approved by our board of
directors. 

Some provisions of our By-laws may discourage, delay or prevent a change in control of our company or management that shareholders may consider favorable,
including provisions that authorize our board of directors to issue preferred shares in one or more series and to designate the price, rights, preferences, privileges
and restrictions of such preferred shares without any further vote or action by our shareholders. 

These provisions could make it more difficult for a third party to acquire us, even if the third party’s offer may be considered beneficial by many shareholders.
As a result, shareholders may be limited in their ability to obtain a premium for their shares. 

We depend on our key personnel, the loss of whom would adversely affect our operations. If we fail to attract and retain the talent required for our business,
our business will be materially harmed. 

We are a small company with 646 full-time employees as of December 31, 2015 and we depend to a great extent on principal members of our management and
scientific teams. If we lose the services of any key personnel, in particular Mr. Weidong Yin, the loss could significantly impede the key decision making on
strategic choices and operational issues, which in turn will harm our business achievement. We do not currently have any key man life insurance policies. We
have entered into employment agreements with our executive officers, under which they have agreed to restrictive covenants relating to non-competition and
non-solicitation. These employment agreements do not, however, guarantee that we will be able to retain the services of our executive officers in the future. In
addition,  recruiting  and  retaining  additional  qualified  scientific,  technical  and  managerial  personnel  and  research  partners  will  be  critical  to  our  success.
Competition among biopharmaceutical and biotechnology companies for qualified employees in China is intense and turnover rates are high. There is currently
a shortage of employees in China with expertise in our areas of research and clinical and regulatory affairs, and this shortage is likely to continue. We may not
be able to retain existing personnel or attract and retain qualified staff in the future. If we fail to hire and retain personnel in key positions, we may be unable to
develop or commercialize our product candidates in a timely manner. 

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We may encounter difficulties in managing our growth, which could adversely affect our results of operations. 

We  have  experienced  a  period  of  rapid  and  substantial  growth  and,  if  such  growth  continues,  will  continue  to  place  a  strain  on  our  administrative  and
operational  infrastructure.  We  also  plan  to  introduce  new  products  to  market  that,  if  successful,  could  place  a  strain  on  our  administrative  and  operational
infrastructure.  If we are unable to manage this growth effectively, our business, results of  operations or  financial condition may be materially and adversely
affected. Our ability to manage our operations and growth effectively requires us to continue to improve our operational, financial and management controls,
reporting systems and procedures and hiring programs. We may not be able to successfully implement these required improvements. 

International expansion may be costly, time-consuming and difficult. If we do not successfully expand internationally, our growth strategy and prospects
would be materially and adversely affected. 

We have entered into selected international markets and intend to continue to expand the sales of our products into new international markets. In expanding our
business internationally, we have entered, and intend to continue to enter, markets in which we have limited or no experience and in which our brand may be
less recognized. To further promote our brand and generate demand for our products so as to attract distributors in international markets, we expect to spend
significantly more on marketing and promotion than we do in our existing domestic markets when appropriate. We may be unable to attract a sufficient number
of distributors, and our selected distributors may not be suitable for selling our products. Furthermore, in new markets, we may fail to anticipate competitive
conditions that are different from those in our existing markets. These competitive conditions may make it difficult or impossible for us to effectively operate in
these  markets.  If  our  expansion  efforts  in  existing  and  new  internal  markets  are  unsuccessful,  our  growth  strategy  and  prospects  would  be  materially  and
adversely affected. 

We are exposed to other risks associated with international operations, including: 

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political instability;

economic instability and recessions;

changes in tariffs;

difficulties of administering foreign operations generally;

limited protection for intellectual property rights;

obligations to comply with a wide variety of foreign laws and other regulatory approval requirements;

increased risk of exposure to terrorist activities;

financial condition, expertise and performance of our international distributors;

export license requirements;

unauthorized re-export of our products;

potentially adverse tax consequences;

inability to effectively enforce contractual or legal rights; and

exchange rate fluctuation, devaluation of foreign currencies.

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We may undertake acquisitions which may have a material adverse effect on our ability to manage our business and may end up being unsuccessful. 

Our growth strategy may involve the acquisition of new production lines, technologies, businesses, products or services or the creation of strategic alliances in
areas in which we do not currently operate. These acquisitions could require that our management develop expertise in new areas, new geographies, manage
new  business  relationships  and  attract  new  types  of  customers.  Furthermore,  acquisitions  may  require  significant  attention  from  our  management,  and  the
diversion of our management’s attention and resources could have a material adverse effect on our ability to manage our business. We may also experience
difficulties integrating acquisitions into our existing business and operations. Future acquisitions may also expose us to potential risks, including risks associated
with: 

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the integration of new operations, services and personnel;

unforeseen or hidden liabilities;

the diversion of resources from our existing businesses and technologies;

our inability to generate sufficient revenue to offset the costs of acquisitions;

potential loss of, or harm to, relationships with employees or customers, any of which could significantly disrupt our ability to manage our business and
materially and adversely affect our business, financial condition and results of operations; and

impairment of intangible assets acquired.

We may be unable to ensure compliance with United States economic sanctions laws, especially when we sell our products to distributors over which we
have limited control. 

The U.S. Department of the Treasury’s Office of Foreign Assets Control administers certain laws and regulations that impose penalties upon U.S. persons and,
in some instances, foreign entities owned or controlled by U.S. persons, for conducting activities or transacting business with certain countries, governments,
entities or individuals subject to U.S. economic sanctions, or U.S. Economic Sanctions Laws. We will not use any proceeds, directly or indirectly, from sales of
our common shares, to fund any activities or business with any country, government, entity or individual with respect to which U.S. persons or, as appropriate,
foreign  entities  owned  or  controlled  by  U.S.  persons,  are  prohibited  by  U.S.  Economic  Sanctions  Laws  from  conducting  such  activities  or  transacting  such
business. However, we sell our products in international markets through independent non-U.S. distributors which are responsible for interacting with the end-
users of our products. We may not be able to ensure that such non-U.S. distributors comply with all applicable U.S. Economic Sanctions Laws. Moreover, if a
U.S. distributor conducts activities or transacts business with a country, government, entity or individual subject to U.S. economic sanctions, such actions may
violate U.S. Economic Sanctions Laws. As a result of the foregoing, actions could be taken against us that could materially and adversely affect our reputation
and have a material adverse effect on our business, financial condition, results of operations and prospects. 

Failure to comply with the U.S. Foreign Corrupt Practices Act and other applicable anti-corruption laws could subject us to penalties and other adverse
consequences and corrupt practices by our competitors may place us at a competitive disadvantage. 

Our executive officers, employees and other agents may violate applicable laws in connection with the marketing or sale of our products, including the U.S.
Foreign Corrupt Practices Act, or the FCPA, and applicable anti-corruption laws in China and other jurisdictions in which our products are sold or registered for
sale. The FCPA generally prohibits United States issuers from engaging in bribery or other prohibited payments to foreign officials for the purpose of obtaining
or  retaining  business  and  requires  issuers  to  maintain  reasonable  internal  controls.  The  PRC  also  strictly  prohibits  bribery  of  government  officials.  We  have
adopted a policy regarding compliance with the FCPA and other applicable anti-corruption laws to prevent, detect and correct such corrupt practice. However,
corruption,  extortion,  bribery,  pay-offs,  theft  and  other  fraudulent  practices  occur  from  time  to  time  in  the  PRC  and  the  countries  in  which  we  seek  to  do
business. While we have implemented measures to ensure compliance with the FCPA and other applicable anti-corruption laws by all individuals involved with
our company, it is possible that our compliance policies and procedures may be insufficient or may fail to prevent our employees or other agents from engaging
in inappropriate conduct for which we might be held responsible. If our employees or other agents are found to have engaged in such practices, we could suffer
severe penalties and other consequences that may have a material adverse effect on our business, financial condition and results of operations. In addition, our
brand and reputation, our sales activities or the price of our common shares could be adversely affected if we become the target of any negative publicity as a
result of actions taken by our employees or other agents. 

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In addition, there may be corrupt practices in the healthcare industry in China and other countries in which we conduct business. For example, in order to secure
agreements with CDCs or hospitals in China, our competitors may engage in corrupt practices in order to influence decision-makers in violation of the anti-
corruption  laws  of  China  and  the  FCPA.  As  competition  persists  and  intensifies  in  our  industry,  we  may  lose  potential  clients,  client  referrals  and  other
opportunities to the extent that our competitors engage in such practices or other illegal activities. 

We may become a passive foreign investment company, which could result in adverse U.S. federal income tax consequences to U.S. Holders of our common
shares. 

Based on the market price of our common shares, the value of our assets and the composition of our income and assets, we do not believe we were a “passive
foreign investment company,” or PFIC, for U.S. federal income tax purposes for our taxable year ended December 31, 2015. A non-U.S. corporation will be a
PFIC for any taxable year if either (i) at least 75% of its gross income for such year is passive income or (ii) at least 50% of the value of its assets (based on an
average of the quarterly values of the assets) during such year is attributable to assets that produce passive income or are held for the production of passive
income. We must make a separate determination after the close of each year as to whether we were a PFIC for that year. The composition of our income and
assets will be affected by how, and how quickly, we use any cash we generate from our operations or raise in any offering. Because the value of our assets for
purposes of the PFIC test will generally be determined by reference to the market price of our common shares, fluctuations in the market price of our common
shares may cause us to become a PFIC for any subsequent year. If we are a PFIC for any year during which a U.S. Holder (as defined in “Item 10. Additional
Information — E. Taxation — United States Federal Income Taxation”) holds our common shares, certain adverse U.S. federal income tax consequences could
apply  to  such  U.S.  Holder.  Please  see  “Item  10.  Additional  Information  —  E.  Taxation  —  United  States  Federal  Income  Taxation  —  Passive  Foreign
Investment Company.” 

Negative publicity regarding vaccinations in China may lead to lower demand for vaccination, which could in turn negatively affect our business, financial
condition and results of operations. 

In  December  2013,  it  was  reported  that  several  infants  died  shortly  after  receiving  inoculations  of  hepatitis  B  vaccine  produced  by  a  domestic  company  in
China. The CFDA and National Health and Family Planning Commission have determined that the inoculated hepatitis B vaccines comply with the applicable
regulatory  standards.  In  March  2016,  media  reposted  on  improperly  stored  vaccines  illegally  sold  in  Shandong  province  and  all  across  China.  The  illegal
distribution started in 2010 and two suspects were detained by police in 2015. Although experts from the World Health Organization, or WHO, has confidence
in China’s vaccine industry and publicly clarified their position several times since news of this scandal broke, public concerns remain. Such negative publicity
may lead to lower demand for vaccination in China, which could in turn negatively affect the vaccine industry and our business, financial condition and results
of operations. 

Risks Related to Government Regulation 

We  may  not  be  able  to  comply  with  applicable  GMP  standards  and  other  regulatory  requirements,  which  could  have  a  material  adverse  effect  on  our
business, financial condition and results of operations. 

We are required to comply with applicable GMP regulations, which include, among other things, requirements relating to personnel, premises and equipment,
raw  material  and  products,  qualification  and  validation,  documents  management,  production  management,  quality  control  and  assurance  and  products
distribution  and  recall.  Manufacturing  facilities  must  be  approved  by  governmental  authorities  before  they  can  be  used  to  commercially  manufacture  our
products and are subject to inspection by regulatory agencies. We have been required to comply with the new GMP standards implemented by CFDA since
March 1, 2011. The new GMP standards are similar to EU GMP standards. All vaccine manufacturers were required to meet the new GMP standards and obtain
certifications for their manufacturing facilities by December 31, 2013. Any manufacturer that failed to meet the deadline will be forced to suspend production.
We have obtained the new GMP certificates for all of our commercial production facilities. However, we cannot assure you that we will be able to continue to
meet the applicable GMP standards and other regulatory requirements in the future. In addition, in light of the recent incident where vaccines were illegally sold
and distributed in Shandong province and other provinces around China, the government may change policies and regulations related to the vaccine sales and
distribution in China. We are not able to estimate the impact of such changed policies and regulations on our business. 

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If we fail to comply with applicable regulatory requirements at any stage during the regulatory process, including following any product approval, we may be
subject to sanctions, including: 

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fines;

product recalls or seizures;

injunctions;

refusal of regulatory agencies to review pending market approval applications or supplements to approval applications;

total or partial suspension of production;

civil penalties;

 withdrawals of previously approved marketing applications; and

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criminal prosecution.

We can only sell products that have received regulatory approvals. Many factors affect our ability to obtain such approvals. 

Pre-clinical and clinical trials of our products, and the manufacturing and marketing of our technologies, are subject to extensive, costly and rigorous regulation
by governmental authorities in the PRC and in other countries. Even if we complete pre-clinical and clinical trials successfully, we may not be able to obtain
applicable regulatory approvals. We cannot market any product candidate until we have both completed our clinical trials and obtained the necessary regulatory
approvals for that product candidate. 

Conducting  clinical  trials  and  obtaining  regulatory  approvals  are  uncertain,  time-consuming  and  expensive  processes.  The  process  of  obtaining  required
regulatory  approvals  from  the  CFDA  and  other  regulatory  authorities  often  takes  many  years  and  can  vary  significantly  based  on  the  type,  complexity  and
novelty of the product candidates. For example, it took us approximately ten years to develop and obtain regulatory approval to commercialize Healive, and it
took  us  five  and  a  half  years  and  four  and  a  half  years,  respectively,  to  develop  and  obtain  regulatory  approvals  to  commercialize  Bilive  and  Anflu.  EV71
vaccine, above all, took us eight years from 2008 to 2016 to develop and obtain regulatory approvals. 

There can be no assurance that all of the clinical trials pertaining to our vaccines in development will be completed within the timeframes currently anticipated
by  us.  We  could  encounter  difficulties  in  enrolling  vaccinees  for  clinical  trials  or  encounter  setbacks  while  conducting  clinical  trials  that  result  in  delays  or
cancellation. Data obtained from pre-clinical and clinical studies are subject to varying interpretations that could delay, limit or prevent regulatory approval, and
failure to observe regulatory requirements or inadequate manufacturing processes are examples of other problems that could prevent approval. In addition, we
may  encounter  delays  or  rejections  in  the  event  of  additional  regulation  from  future  legislation,  administrative  action  or  changes  in  the  CFDA  policy  or  if
unforeseen health risks become an issue with the participants of clinical trials. Clinical trials may also fail at any stage. Results of early trials frequently do not
predict results of later trials, and acceptable results in early trials may not be repeated. For these reasons, we do not know whether regulatory authorities will
grant approval for any of our product candidates in the future. In addition, production permits for our products are valid for only five years and we need to apply
for renewal six months prior to their expirations. The approving process for our renewal applications could be lengthy and there is no assurance that we will be
granted renewal in a timely manner or at all. 

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Delays in obtaining the CFDA or foreign approvals of our products could result in substantial additional costs and adversely affect our ability to compete with
other companies. Even if regulatory approval is ultimately granted, there can be no assurance that we can maintain the approval or that the approval will not be
withdrawn. Any approval received may also restrict the intended use and marketing of the product we want to commercialize. 

Outside  the  PRC,  our  ability  to  market  any  of  our  potential  products  is  contingent  upon  receiving  marketing  authorizations  from  the  appropriate  foreign
regulatory authorities. These foreign regulatory approval processes include all of the risks associated with the CFDA approval process described above and may
include additional risks. 

Because the medical conditions that our vaccines are intended to prevent represent significant public health threats, we are at risk of governmental actions
detrimental to our business, such as product seizure, compulsory licensing, resumed price controls and additional regulations. 

In response to a pandemic or the perceived risk of a pandemic, governments in the PRC and other countries may take actions to protect their citizens that could
affect  our  ability  to  control  the  production  and  export  of  pandemic  vaccines  or  otherwise  impose  burdensome  regulations  on  our  business.  For  example,  an
outbreak of influenza could subject our manufacturing locations to seizure by the PRC government. The PRC government may also grant compulsory licenses
to allow competitors to manufacture products that are protected by our patents, use our technology developed using funds received from government agencies or
resume its price control over vaccines although such control has recently been lifted in China. 

We deal with hazardous materials that may cause injury to others. These materials are regulated by environmental laws that may impose significant costs
and restrictions on our business. 

Our  research  and  development  programs  and  manufacturing  operations  involve  the  controlled  use  of  potentially  harmful  biological  materials  and  other
hazardous  materials.  We  cannot  completely  eliminate  the  risk  of  accidental  contamination  or  injury  to  our  employees  or  others  from  the  use,  manufacture,
storage, handling or disposal of hazardous materials and certain waste products. In the event of contamination or injury, we could be held liable for any resulting
damages, and any liability could exceed our resources or any applicable insurance coverage we may have. We are also subject to PRC laws and regulations
governing the construction and operation of production facilities that may have an impact on the environment and the use, manufacture, storage, handling or
disposal  of  hazardous  materials  and  waste  products,  such  as  the  PRC  Environmental  Impact  Assessment  Law,  the  PRC  Prevention  and  Control  of  Water
Pollution Law and the PRC Environmental Protection Law, as well as waste-disposal standards set by the relevant governmental agencies. It is likely that China
will  adopt  stricter  pollution  controls  as  the  country  is  experiencing  increasingly  serious  environmental  pollution.  Although  we  passed  an  environmental
examination of our facilities conducted in 2004 by the Beijing Municipal Environment Protection Bureau on our hepatitis A vaccine production line and passed
the same examination on our seasonal flu vaccine production line and filling and packaging line in 2005 and 2008, respectively, we cannot assure you that we
will  continue  to  pass  similar  environmental  examinations  on  any  future  production  facilities  that  we  may  construct.  In  addition,  according  to  the  PRC
Environmental Impact Assessment Law, after the approval of previous environmental impact assessment report, if there is any material change in the nature,
scale, location, production technology used and measures adopted to prevent damages to ecology, new environmental impact assessment reports need to be filed
for approval. We have already obtained the approval of the environmental impact assessment report from the Beijing Municipal Environment Protection Bureau
for the construction plan of our facilities in Changping District, Beijing. We currently produce Bilive vaccine at our production facility for hepatitis A vaccine
and produce Panflu and Panflu.1 vaccines at our production facility for seasonal flu or Anflu vaccine. We have canceled the construction plan for influenza
vaccine  production  facility.  New  environmental  impact  assessment  report  regarding  the  change  has  been  submitted  to  the  relevant  environment  protection
authorities and has passed the government inspection. We also added an sIPV production facility to the Changping construction plan and are in the stage of
filing  the  relevant  environmental impact  assessment report.  In  addition,  we  have  obtained  approval  for  the  environmental  impact  assessment  report  for  PPV
production  facility  at  our  Shangdi  site  and  completed  the  construction.  We  are  required  to  pass  the  government  inspection  so  as  to  launch  the  commercial
production  of  PPV.  If  we  fail  to  pass  the  inspection,  we  cannot  commence  commercial  production  of  the  product.  Moreover,  we  do  not  currently  have  a
pollution and remediation insurance policy to mitigate any risk related to environmental pollution or violation of environmental law. 

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Failure to commence development of land which we have been granted right to use within the required timeframe may cause us to lose our land use rights. 

Sinovac Dalian was granted land use rights to two parcels of land, with an aggregate area of 95,686 square meters (approximately 1,030,000 square feet) located
in the Economic and Technical Development Zone of Dalian, Liaoning province by the local government. According to the relevant PRC regulations, a parcel
of land may be treated as idle land if development of the land has not been commenced within one year after the commencement date stipulated in the land use
rights grant contract or the issuance date of the construction land approval certificate. Land users can extend the deadline for commencing the construction work
for one year. All of our facilities of Sinovac Dalian are located at one of the two parcels of the land with an aggregated area of 55,606 square meters (598,582
square  feet).  However,  as  of  the  date  of  this  annual  report, we  have  not  commenced development  of  the  other  parcel  of  the  land  with  40,080 square  meters
(431,418 square feet), which Sinovac Dalian was granted the right to use. PRC government may treat the land as idle land, in which case we may be required to
pay idle land fees or penalties, change the intended use of the land, find another parcel of land, or even be required to forfeit the land to PRC government, any of
which would adversely affect our financial condition. 

Negative publicity regarding China-based companies listed in the United States may affect the trading price of our common shares and result in increased
regulatory scrutiny of our business. 

In the past, litigation and negative publicity surrounding companies with operations in China that are listed in the United States have resulted in declining stock
prices for such companies. Various equity research organizations have published reports on China-based companies after examining their corporate governance
practices, related party transactions, sales practices and financial statements that have led to special investigations and stock suspensions on national exchanges.
Any similar scrutiny of us, regardless of merit, could result in a diversion of our management’s attention from managing our core business, negative publicity,
potential costs to defend ourselves against rumors, volatility and loss in the trading price of our common shares and increased directors’ and officers’ insurance
premiums, any of which could materially and adversely affect our business, financial condition and results of operations. 

Risks Related to Our Intellectual Property 

If we are unable to protect our technologies from competitors with patents or other forms of intellectual property protection, our business may be harmed. 

Our success depends, in part, on our ability to protect our proprietary technologies. We try to protect the technology that we consider important to our business
by filing PRC patent applications and relying on trade secret and pharmaceutical regulatory protection. 

We  have  a  total  of  29  issued  patents  and  a  number  of  pending  patent  applications  relating  to  our  vaccines  in  China,  for  which  our  hepatitis  A  vaccine  and
seasonal influenza vaccine have five and three issued patents for protection, respectively. The process of seeking patent protection in China can be lengthy and
expensive and we cannot assure you that our pending patent applications, or any patent applications we may make in the future with respect to other products,
will result in issued patents, or that any patents issued in the future will be able to provide us with meaningful protection or commercial advantage. Our patent
applications may be challenged, invalidated or circumvented in the future. 

In addition to patents, we rely on trade secrets and proprietary know-how to protect our intellectual property. We have entered into confidentiality agreements
(which  include,  in  the  case  of  employees,  non-competition  provisions)  with  many  of  our  employees,  consultants,  outside  scientific  collaborators,  sponsored
researchers and other advisors. These agreements provide that all confidential information developed or made known to the individual during the course of the
individual’s relationship with us is to be kept confidential and not disclosed to third parties except in specific circumstances. In the case of our employees, the
agreements  provide  that  all  of  the  technology  which  is  conceived  by  the  individual  during  the  course  of  employment  is  our  exclusive  property.  These
agreements  may  not  provide  meaningful  protection  or  adequate  remedies  in  the  event  of  unauthorized  use  or  disclosure  of  our  proprietary  information.  In
addition, it is possible that third parties could independently develop information and techniques substantially similar to ours or otherwise gain access to our
trade secrets. 

We cannot assure you that our current or potential competitors, many of whom have substantial resources and have made substantial investments in competing
technologies, do not have and will not develop products that compete directly with our products despite our intellectual property rights. 

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Intellectual property rights and confidentiality protections in China may not be as effective as in the United States or other countries. Policing unauthorized use
of  proprietary  technology  is  difficult  and  expensive,  and  we  might  need  to  resort  to  litigation  to  enforce  or  defend  patents  issued  to  us  or  to  determine  the
enforceability, scope and validity of our proprietary rights or those of others. The experience and capabilities of PRC courts in handling intellectual property
litigation varies, and outcomes are unpredictable. Further, such litigation may require significant expenditures of cash and management efforts and could harm
our  business,  financial  condition  and  results  of  operations.  An  adverse  determination  in  any  such  litigation  could  materially  impair  our  intellectual  property
rights and may harm our business, prospects and reputation. 

We may be exposed to infringement or misappropriation claims by third parties which, if determined adversely to us, could cause substantial liabilities to us, or
we  may  be  unable  to  sell  some  of  our  products.  Please  see  “Item  4.  Information  on  the  Company  —  B.  Business  Overview  —  Intellectual  Property  and
Proprietary Technology”. 

Third parties may bring intellectual property infringement claims against us in the future. 

Our commercial success also depends significantly on our ability to operate without infringing the patents and other proprietary rights of third parties. Even
after reasonable investigation, we may not know with certainty whether we have infringed upon a third party’s patent due to the complexity of patent claims, the
inadequacy of patent clearance search procedures in the PRC and the fact that a third party may have filed a patent application without our knowledge while that
product was under development by us. Patent applications are maintained in secrecy until their publication 18 months after the filing date. The publication of
discoveries in the  scientific  or patent literature  frequently occurs substantially  later than the date on  which  the underlying discoveries were made and patent
applications were filed. China, similar to many other countries, adopts the first-to-file system under which the first party to file a patent application (instead of
the  first  to  invent  the  subject  invention)  may  be  awarded  a  patent.  There  may  also  be  technologies  licensed  to  us  or  acquired  by  us  that  are  subject  to
infringement, misappropriation or other claims by others which could damage our ability to rely on such technologies. 

If a third party claims that we infringe upon its proprietary rights, any of the following may occur: 

 we may become involved in time-consuming and expensive litigation, even if the claim is without merit;

 we may become liable for substantial damages for past infringement if a court decides that our technology infringes upon a competitor’s patent;



a court may prohibit us from selling or licensing our product without a license from the patent holder, which may not be available on commercially
reasonable terms, if at all, or which may require us to pay substantial royalties or grant cross licenses to our patents;

 we may have to reformulate our product so that it does not infringe upon others’ patent rights, which may not be possible or could be very expensive

and time-consuming; and

 we may be subject to injunctions prohibiting the manufacture and sale of our products or the use of our technologies.

If any of these events occurs, our business will suffer and the market price of our common shares could decline. 

The  success  of  our  business  may  depend  on  licensing  vaccine  components  from,  and  entering  into  collaboration  arrangements  with,  third  parties.  We
cannot be certain that our licensing or collaboration efforts will succeed or that we will realize any revenue from them. 

The  success  of  our  business  strategy  depends,  in  part,  on  our  ability  to  enter  into  licensing  and  collaboration  arrangements  and  to  effectively  manage  the
resulting  relationships.  Our  ability  to  enter  into  agreements  with  commercial  partners  depends  in  part  on  our  ability  to  convince  them  of  the  value  of  our
technology and know-how. This may require substantial time and effort on our part. While we anticipate expending substantial funds and management effort,
we cannot assure you that strategic relationships will result or that we will be able to negotiate additional strategic agreements in the future on acceptable terms,
if at all. Furthermore, we may incur significant financial commitments to collaborators in connection with potential licenses and sponsored research agreements.
In addition, we may not be able to control the areas of responsibility undertaken by our strategic partners and may be adversely affected should these partners
prove  to  be  unable  to  carry  a  product  candidate  forward  to  full  commercialization  or  should  they  lose  interest  in  dedicating  the  necessary  resources  toward
developing any such product quickly. 

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Third parties may terminate our licensing and other strategic arrangements if we do not perform as required under these arrangements. Generally, we expect that
agreements  for  rights  to  develop  technologies  will  require  us  to  exercise  diligence  in  bringing  product  candidates  to  market  and  may  require  us  to  make
milestone and royalty payments that, in some instances, could be substantial. Our failure to exercise the required diligence or make any required milestone or
royalty  payments  could  result  in  the  termination  of  the  relevant  license  agreement,  which  could  have  a  material  adverse  effect  on  us  and  our  operations.  In
addition,  these  third  parties  may  also  breach  or  terminate  their  agreements  with  us  or  otherwise  fail  to  conduct  their  activities  in  connection  with  our
relationships in a timely manner. If we or our partners terminate or breach any of our licenses or relationships, we may: 

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lose our rights to develop and market our product candidates;

lose patent and/or trade secret protection for our product candidates;

experience significant delays in the development or commercialization of our product candidates;

not be able to obtain any other licenses on acceptable terms, if at all; and

incur liability for damages.

Licensing arrangements and strategic relationships in our industry can be very complex, particularly with respect to intellectual property rights. Disputes may
arise in the future regarding ownership rights to technology developed by or with other parties. These and other possible disagreements between us and third
parties with respect to our licenses or our strategic relationships could lead to delays in the research, development, manufacture and commercialization of our
product candidates. These disputes could also result in litigation or arbitration, both of which are time-consuming and expensive. These third parties also may
pursue alternative technologies or product candidates either on their own or in strategic relationships with others in direct competition with us. 

Any cessation or suspension of our collaborations with scientific advisors and academic institutions may increase our costs in research and development,
lengthen our new vaccines development process and lower our efficiency in new products development. 

We  work  with  scientific  advisors  and  academic  collaborators  who  assist  us  in  some  of  our  research  and  development  efforts.  Some  of  our  pre-clinical  and
research  programs  are  heavily  reliant  upon  such  collaborators  and  we  generally  benefit  considerably  from  the  resources,  technology  and  experience  these
collaborations can provide. These scientists are not, however, our employees and may have other commitments that limit their availability to us. If a conflict of
interest  arises  between  their  work  for  us  and  their  work  for  another  entity,  we  may  lose  the  services  of  these  scientists  and  institutions.  Any  cessation  or
suspension of our collaborations with scientific advisors and academic institutions may increase our research and development costs, lengthen our new vaccines
development process and lower our efficiency in new products development. In addition, although our scientific advisors and academic collaborators generally
sign  agreements  not  to  disclose  our  confidential  information,  it  is  possible  that  valuable  proprietary  knowledge  may  become  publicly  known  which  would
compromise our competitive advantage. 

We may lose the right to use “科兴” (Kexing) on our vaccine products and/or as part of our trade name. 

We currently use “科兴” (Kexing) as part of Sinovac Beijing’s Chinese trade name in the PRC. We also use “科兴” (Kexing) as part of the Chinese trade name
of Sinovac Dalian in the PRC. Shenzhen Kexing currently owns the “科兴” trademark registered in China for Class 5 (Pharmaceuticals) under the International
Classification of Goods and Services. To protect our interest in using “科兴” in our trade name, we applied to register “科兴” in China for Class 42 (Scientific
& Technological Services &Research) in 2006 and the PRC Trademark Office of the State Administration for Industry and Commerce approved our application
in 2010. The “科兴” trademark owned by Shenzhen Kexing has not been identified as “Well-known Trademark” by the relevant PRC authorities since we first
started using “科兴” in the trade name of Sinovac Beijing in 2001. If the “科兴” trademark owned by Shenzhen Kexing is ever officially identified as a “Well-
Known Trademark,” however, we may be subject to trademark infringement claim for the use of “科兴” in our trade name. Although the trademark application
and the trade name approval systems are administered separately in China, it is possible that we may lose our ability to use the “科兴” trademark in our trade
name due to a successful trademark infringement claim, which may adversely affect our ability to maintain and protect our brands, cause us to incur litigation
costs and divert resources and management attention. 

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Risks Related to Doing Business in China 

Adverse changes in political, economic and other policies of the PRC government could have a material adverse effect on the overall economic growth of
China, which could reduce the demand for our products and materially and adversely affect our competitive position. 

All  of  our  business  operations  are  conducted  in  China,  and  around  99.1%  of  our  sales  are  currently  made  in  China.  Accordingly,  our  business,  financial
condition, results of operations and prospects are affected significantly by economic, political and legal developments in China. The Chinese economy differs
from the economies of most developed countries in many respects, including: 

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





the extent of government involvement;

the level of development;

the growth rate;

the control of foreign exchange;

the allocation of resources;

an evolving regulatory system; and

a lack of sufficient transparency in the regulatory process.

While the Chinese economy has experienced significant growth in the past 30 years, growth has been uneven, both geographically and among various sectors of
the  economy. The PRC  government  has implemented  various  measures to encourage economic growth  and  guide the  allocation  of resources. Some of these
measures benefit the overall Chinese economy, but may also have a negative effect on us. For example, our financial condition and results of operations may be
adversely affected by government control over capital investments or changes in tax regulations that are applicable to us. 

The Chinese economy has been transitioning from a planned economy to a more market-oriented economy. Although in recent years the PRC government has
implemented  measures  emphasizing  the  utilization  of  market  forces  for  economic  reform,  the  reduction  of  state  ownership  of  productive  assets  and  the
establishment  of  sound  corporate  governance  in  business  enterprises,  a  substantial  portion  of  the  productive  assets  in  China  is  still  owned  by  the  Chinese
government. The continued control of these assets and other aspects of the national economy by the PRC government could materially and adversely affect our
business. The PRC government also  exercises  significant  control  over Chinese  economic  growth through  the allocation of  resources,  controlling payment  of
foreign  currency-denominated  obligations,  setting  monetary  policy  and  providing  preferential  treatment  to  particular  industries  or  companies.  Efforts  by  the
PRC  government  to  slow  the  pace  of  growth  of  the  Chinese  economy  could  result  in  hospitals  spending  less,  which  in  turn  could  reduce  demand  for  our
products. 

Moreover, the political relationship among foreign countries and China is subject to sudden fluctuation and periodic tension. Changes in political conditions in
China and changes in the state of foreign relations are difficult to predict and could adversely affect our product export and international collaborations. This
could lead to a decline in our profitability in the future. 

Although the  Chinese economy has  grown significantly in the past decade, that growth may not continue, as  evidenced by the  slowing of the growth of the
Chinese economy since 2012. Any adverse change in the economic conditions or government policies in China could have a material adverse effect on overall
economic growth and the level of healthcare investments and expenditures in China, which in turn could lead to a reduction in demand for our products and
consequently have a material adverse effect on our businesses. 

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Future changes in laws, regulations or enforcement policies in China could adversely affect our business. 

Laws, regulations and enforcement policies in China, including those regulating our business, are evolving and subject to future change. Future changes in laws,
regulations  or  administrative  interpretations,  or  stricter  enforcement  policies  by  the  PRC  government,  could  impose  more  stringent  requirements  on  us,
including fines or other penalties. Changes in applicable laws and regulations may also increase our operating costs. Compliance with such requirements could
impose substantial additional costs or otherwise have a material adverse effect on our business, financial condition and results of operations. These changes may
relax  some  requirements,  which  could  be  beneficial  to  our  competitors  or  could  lower  market  entry  barriers  and  increase  competition.  Further,  regulatory
agencies in China may, sometimes abruptly, change their enforcement practices. Therefore, prior enforcement activity, or lack of enforcement activity, is not
necessarily predictive of future actions. Any enforcement actions against  us could have a material adverse effect on us and the market price of our common
shares. In addition, any litigation or governmental investigation or enforcement proceedings in China may be protracted and may result in substantial cost and
diversion of resources and management attention, negative publicity, damage to our reputation and decline in the price of our common shares. 

We  rely  on  dividends  paid  by  our  PRC  subsidiaries  for  our  cash  needs.  If  they  are  unable  to pay  us  sufficient  dividends  due  to  statutory  or  contractual
restrictions on their abilities to distribute dividends to us, our various cash needs may not be met. 

We  are  a  holding  company,  and  we  rely  on  the  dividends  paid  by  our  PRC  subsidiaries,  including  majority-owned  subsidiary,  Sinovac  Beijing,  our  wholly-
owned subsidiaries, and Sinovac R&D (formerly known as Sinovac Biological and our 55%-owned subsidiary, Sinovac Dalian, for our cash needs, including
the funds necessary to pay any dividends and other cash distributions to our shareholders, service any debt we may incur and pay our operating expenses. The
payment of dividends in the PRC is subject to limitations. Regulations in the PRC currently permit payment of dividends by our PRC subsidiaries only out of
accumulated profits as determined in accordance with accounting standards and regulations in China. For instance, in accordance with the regulations in China,
Sinovac Beijing, Sinovac Dalian, Sinovac R&D and Sinovac Biomed are required to set aside at least 10% of its after-tax profits each year to contribute to its
reserve  fund  until  the  accumulated  balance  of  such  reserve  fund  reaches  50%  of  the  registered  capital  of  each  company.  Sinovac  Beijing,  Sinovac  Dalian,
Sinovac R&D and Sinovac Biomed are required to set aside, at the discretion of their respective board of directors, a portion of their annual income after taxes
to their employee welfare and bonus funds. These funds reduce the ability of the subsidiaries to pay dividend in cash. In addition, if Sinovac Beijing, Sinovac
Dalian, Sinovac R&D or Sinovac Biomed incurs debt on its own behalf in the future, the instruments governing the debt may restrict either company’s ability to
pay dividends or make other distributions to us. 

Restrictions on currency exchange may limit our ability to receive and use our revenues effectively. 

We receive over 99% of our revenues in renminbi, which currently is not a freely convertible currency. A portion of our revenues may be converted into other
currencies to meet our foreign currency obligations, including, among others, payment of dividends declared by our subsidiaries. Under China’s existing foreign
exchange regulations, Sinovac Beijing, Sinovac R&D and Sinovac Dalian are able to pay dividends in foreign currencies without prior approval from the State
Administration  of  Foreign  Exchange,  or  the  SAFE,  by  complying  with  certain  procedural  requirements.  However,  we  cannot  assure  you  that  the  PRC
government will not take future measures to restrict access to foreign currencies for current account transactions. 

Our  PRC  subsidiaries’  ability  to  obtain  foreign  exchange  is  subject  to  significant  foreign  exchange  controls  and,  in  the  case  of  amounts  under  the  capital
account, requires the approval of and/or registration with PRC government authorities, including the SAFE. In particular, if we finance our PRC subsidiaries by
means of foreign currency from us or other foreign lenders, the amount is not allowed to exceed the difference between the amount of total investment and the
amount of the registered capital as approved by the Ministry of Commerce and registered with the SAFE. Further, such loans must be registered with the SAFE.
If we finance our PRC subsidiaries by means of additional capital contributions, the amount of these capital contributions must first be approved by the relevant
government approval authority. These limitations could affect the ability of our PRC subsidiaries to obtain foreign exchange through debt or equity financing. 

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Fluctuation in the value of the renminbi may have a material adverse effect on your investment. 

The  value  of  the  renminbi  against  the  U.S.  dollar,  Euro  and  other  currencies  is  affected  by,  among  other  things,  changes  in  China’s  political  and  economic
conditions and China’s foreign exchange policies. The PRC government allows the renminbi to fluctuate within a narrow and managed band against a basket of
certain foreign currencies. In recent years, the exchange rate between the renminbi and U.S. dollar has been relatively stable and consequently the renminbi has
sometimes fluctuated sharply against other freely traded currencies, in tandem with the U.S. dollar. Since June 2010, the RMB has started to slowly appreciate
against the U.S. dollar, though there have been periods when the U.S. dollar has appreciated against the RMB. On August 11, 2015, the People’s Bank of China
allowed the RMB to depreciate by approximately 2% against the U.S. dollar. Over the following two days, Chinese currency fell 3.5% against the dollar. It is
difficult to predict how long such depreciation of the RMB against the U.S. dollar may last and when and how the relationship between the RMB and the U.S.
dollar may change again. The PRC government indicated that it will make the foreign exchange rate of the renminbi more flexible and widen the trading band of
renminbi,  which  increases  the  possibility  of  sharp  fluctuations  in  renminbi’s  value  in  the  future  as  well  as  the  unpredictability  associated  with  renminbi’s
exchange rate. There remains significant international pressure on the PRC government to adopt an even more flexible currency policy, which could result in
further and more significant fluctuations of the renminbi against foreign currencies. As the majority of our costs and expenses are denominated in renminbi, a
resumption  of  the  appreciation  of  the  renminbi  against  the  U.S.  dollar  would  further  increase  our  costs  in  U.S.  dollar  terms.  In  addition,  as  our  operating
subsidiaries in China receive revenues in renminbi, any significant depreciation of the renminbi against the U.S. dollar may have a material adverse effect on
our revenues in U.S. dollar terms and financial condition, and the value of, and any dividends payable on, our common shares. For example, to the extent that
we  need  to  convert  U.S.  dollars  into  renminbi  for  our  operations,  appreciation  of  the  renminbi  against  the  U.S.  dollar  would  have  an  adverse  effect  on  the
renminbi amount we receive from the conversion. Conversely, if we decide to convert our renminbi into U.S. dollars for the purpose of making payments for
dividends on our common shares or for other business purposes, appreciation of the U.S. dollar against the renminbi would have a negative effect on the U.S.
dollar amount available to us. 

Our business benefits from certain government tax incentives. Expiration, reduction or elimination of these incentives will increase our tax expenses and in
turn decrease our net income. 

Pursuant to the PRC Enterprise Income Tax Law, or the EIT Law, and its implementation rules, both domestic companies and the foreign invested enterprises,
or the FIEs, are subject to a unified income tax rate of 25%. Tax exemption or reduction with fixed terms enjoyed by enterprises including us will continue until
the  expiry  of  the  prescribed  period.  Preferential  tax  treatments  will  continue  to  be  granted  to  high  and  new  technology  enterprises  that  conduct  business  in
encouraged  sectors,  whether  FIEs  or  domestic  companies.  Sinovac  Beijing  reconfirmed  its  “High  and  New  Technology  Enterprises,”  or  HNTE,  status  and
obtained the corresponding certificate in 2014 for a period of three years. As a result, subject to satisfaction of applicable criteria as confirmed by the competent
authorities, Sinovac Beijing was entitled to a reduced enterprise income tax, or EIT, rate of 15% from 2014 to 2016. The PRC government could eliminate any
of these preferential tax treatments before their scheduled expiration. Expiration, reduction or elimination of such tax incentives will increase our tax expenses
and in turn decrease our net income. 

Under the EIT Law, dividends payable by us and gains on the disposition of our shares may be subject to PRC taxation. 

If we were considered a PRC resident enterprise under the EIT Law, our shareholders who are deemed non-resident enterprises may be subject to the EIT at the
rate of 10% upon the dividends payable by us or upon any gains realized from the transfer of our shares, if such income is deemed derived from China, provided
that (i) such foreign enterprise investor has no establishment or premises in China, or (ii) it has an establishment or premises in China but its income derived
from China has no real connection with such establishment or premises. If we were required under the EIT Law to withhold PRC income tax on our dividends
payable to our non-PRC enterprise shareholders, or if any gains realized from the transfer of our shares by our non-PRC enterprise shareholders were subject to
the EIT, such shareholders’ investment in our shares would be materially and adversely affected. 

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PRC regulations relating to investments in offshore companies by PRC residents may subject our PRC-resident beneficial owners or our PRC subsidiaries
to liability or penalties, limit our ability to inject capital into our PRC subsidiaries or limit our PRC subsidiaries’ ability to increase their registered capital
or distribute profits. 

SAFE  promulgated  the  Circular  on  Relevant  Issues  Concerning  Foreign  Exchange  Control  on  Domestic  Residents’  Offshore  Investment  and  Financing  and
Roundtrip Investment through Special Purpose Vehicles, or SAFE Circular 37, on July 4, 2014, which replaced the former circular commonly known as “SAFE
Circular 75” promulgated by SAFE on October 21, 2005. SAFE Circular 37 requires PRC residents to register with the local branches of SAFE in connection
with their direct establishment or indirect control of an offshore entity, for the purpose of overseas investment and financing, with such PRC residents’ legally
owned assets or equity interests in domestic enterprises or offshore assets or interests, referred to in SAFE Circular 37 as a “special purpose vehicle.” SAFE
Circular 37 further requires amendment to the registration in the event of any significant changes with respect to the special purpose vehicle, such as increase or
decrease of capital contributed by PRC individuals, share transfer or exchange, merger, division, or other material events. In the event that a PRC shareholder
holding  interests  in  a  special  purpose  vehicle  fails  to  fulfill  the  required  SAFE  registration,  the  PRC  subsidiaries  of  that  special  purpose  vehicle  may  be
prohibited from making profit distributions to the offshore parent and from carrying out subsequent cross-border foreign exchange activities, and the special
purpose  vehicle  may  be  restricted  in  its  ability  to  contribute  additional  capital  into  its  PRC  subsidiary.  Moreover,  failure  to  comply  with  the  various  SAFE
registration requirements described above could result in liability under PRC law for evasion of foreign exchange controls. According to the Notice on Further
Simplifying and Improving Policies for the Foreign Exchange Administration of Direct Investment released on February 13, 2015 by SAFE, local banks will
examine and handle foreign exchange registration for overseas direct investment, including the initial foreign exchange registration and amendment registration,
under  SAFE  Circular  37  from  June  1,  2015.  However,  since  this  notice  has  not  yet  come  into  force,  there  exist  high  uncertainties  with  respect  to  its
interpretation and implementation by governmental authorities and banks. 

Mr. Weidong Yin has made the required SAFE registration with respect to his investments in our company. However, we may not be aware of the identities of
all  of  our  beneficial  owners  who  are  PRC  residents.  We  do  not  have  control  over  our  beneficial  owners  and  cannot  assure  you  that  all  of  our  PRC-resident
beneficial  owners  will  comply  with  SAFE  Circular  37  and  subsequent  implementation  rules.  The  failure of  our  beneficial  owners  who  are  PRC  residents  to
register or amend their foreign exchange registrations in a timely manner pursuant to SAFE Circular 37 and subsequent implementation rules, or the failure of
future  beneficial  owners  of  our  company  who  are  PRC  residents  to  comply  with  the  registration  procedures  set  forth  in  SAFE  Circular  37  and  subsequent
implementation  rules,  may  subject  such  beneficial  owners  or  our  PRC  subsidiaries  to  fines  and  legal  sanctions.  Furthermore,  since  SAFE  Circular  37  was
recently  promulgated  and  it  is  unclear  how  this  regulation,  and  any  future  regulation  concerning  offshore  or  cross-border  transactions,  will  be  interpreted,
amended and implemented by the relevant PRC government authorities, we cannot predict how these regulations will affect our business operations or future
strategy. Failure to register or comply with relevant requirements may also limit our ability to contribute additional capital to our PRC subsidiaries and limit our
PRC subsidiaries’ ability to distribute dividends to our company. These risks may have a material adverse effect on our business, financial condition and results
of operations. 

Any failure to comply with PRC regulations regarding our employee equity incentive plans may subject the PRC plan participants or us to fines and other
legal or administrative sanctions. 

Pursuant  to  SAFE  Circular  37,  PRC  residents  who  participate  in  share  incentive  plans  in  overseas  non-publicly-listed  companies  due  to  their  position  as
director, senior management or employees of the PRC subsidiaries of the overseas companies may submit applications to SAFE or its local branches for the
foreign exchange registration with respect to offshore special purpose companies. Our directors, executive officers and other employees who are PRC residents
and  who  have  been  granted  options  and  restricted  shares  were  able  to  follow  SAFE  Circular  37  to  apply  for  the  foreign  exchange  registration  before  our
company became an overseas listed company. Since our company has become an overseas listed company, we and our directors, executive officers and other
employees who are PRC residents and who have been granted options are subject to the Notice on Issues Concerning the Foreign Exchange Administration for
Domestic  Individuals  Participating  in  Stock  Incentive  Plan  of  Overseas  Publicly  Listed  Company,  issued  by  SAFE  in  February  2012,  according  to  which,
employees, directors, supervisors and other management members participating in any stock incentive plan of an overseas publicly listed company who are PRC
residents  are  required  to  register  with  SAFE  through  a  domestic  qualified  agent,  which  could  be  a  PRC  subsidiary  of  such  overseas  listed  company,  and
complete certain other procedures. Failure to complete the SAFE registrations may subject them to fines and legal sanctions and may also limit the ability to
make  payment  under  our  equity  incentive  plans or  receive  dividends  or  sales  proceeds  related thereto,  or  our  ability to  contribute  additional  capital  into  our
wholly-foreign  owned  enterprises  in  China  and  limit  our  wholly-foreign  owned  enterprises’  ability  to  distribute  dividends  to  us.  We  also  face  regulatory
uncertainties that could restrict our ability to adopt additional equity incentive plans for our directors and employees under PRC law. 

In addition, the State Administration for Taxation has issued circulars concerning employee share options or restricted shares. Under these circulars, employees
working in the PRC who exercise share options, or whose restricted shares or restricted share units, or RSUs, vest, will be subject to PRC individual income tax.
The PRC subsidiaries of an overseas listed company have obligations to file documents related to employee share options or restricted shares with relevant tax
authorities and to withhold individual income taxes of those employees related to their share options, restricted shares or RSUs. If the employees fail to pay, or
the PRC subsidiaries fail to withhold, their income taxes according to relevant laws, rules and regulations, the PRC subsidiaries may face sanctions imposed by
the tax authorities or other PRC government authorities. 

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PRC regulation of  loans and  direct investment by offshore holding  companies to PRC entities may delay or prevent us from making  loans or additional
capital contributions to our PRC operating subsidiaries and affiliated entities. 

In funding our PRC subsidiaries, we must comply with PRC legal requirements relating to foreign debt registration and to PRC foreign-investment companies’
“registered capital” and “total investment.” “Registered capital” refers to the capital contributed to or paid into a PRC foreign-investment company in cash or in
kind, and “total investment” refers to the amount of a PRC foreign-investment company’s registered capital plus all external borrowings by such company. The
amounts of a PRC foreign-investment company’s registered capital and total investment are set forth in the company’s constitutional documents and approved
by the competent government authority in advance and, in the case of Sinovac Beijing and Sinovac Dalian, must be approved by their minority shareholders,
Sinobioway Medicine (formerly named Xiamen Bioway Group Co., Ltd) or Dalian Jin Gang Group, respectively, as well. 

Loans  by  us  or  Sinovac  Hong  Kong  to  Sinovac  Beijing,  Sinovac  R&D  or  Sinovac  Dalian  cannot  exceed  the  difference  between  such  company’s  registered
capital and total investment, unless the company has obtained the approval of the approval authority and, in the case of Sinovac Beijing or Sinovac Dalian, the
approval of Sinobioway Medicine or Dalian Jin Gang Group, respectively, to increase the amount of total investment. Further, such loans must be registered
with the SAFE or its local counterpart. 

We  may  also  decide  to  finance  our  PRC  subsidiaries  by  making  additional  capital  contributions.  These  additional  contributions  must  be  approved  by  the
government approval authority and, in the case of Sinovac Beijing or Sinovac Dalian, by Sinobioway Medicine or Dalian Jin Gang Group, respectively. We
cannot assure you that we will be able to obtain these government registrations or approvals, or the approval of Sinobioway Medicine or Dalian Jin Gang Group,
on  a  timely  basis,  if  at  all,  with  respect  to  future  loans  or  additional  capital  contributions  by  us  to  our  subsidiaries  or  affiliates.  If  we  fail  to  obtain  such
registrations or approvals, our ability to capitalize our PRC operations would be negatively affected, which could adversely and materially affect the liquidity of
our subsidiaries and our ability to expand our business. 

Because we are incorporated under Antigua and Barbuda law, substantially all of our operations, property and assets are located in China and all of our
directors and  officers  and substantially  all  of  their  assets  are  located  outside  of  the United  States, you  may  be  unable  to  protect your  shareholder  rights
under U.S. law in a court in the United States. 

We are incorporated in Antigua and Barbuda. Our corporate affairs are governed by our Articles of Incorporation and By-laws and by the International Business
Corporations Act and common law of Antigua and Barbuda. The rights of shareholders to take legal action against our directors, officers and us, actions by
minority shareholders and the fiduciary responsibilities of our directors to us are to a large extent governed by the International Business Corporations Act and
common law of Antigua and Barbuda. The common law of Antigua and Barbuda is derived in part from comparatively limited judicial precedent in Antigua and
Barbuda  as  well  as  from  English  common  law,  which  has  persuasive,  but  not  binding,  authority  on  a  court  in  Antigua  and  Barbuda.  The  rights  of  our
shareholders and the fiduciary responsibilities of our directors under Antigua and Barbuda law are not as clearly established as they would be under statutes or
judicial  precedents  in  the  United  States.  Among  other  things,  Antigua  and  Barbuda  has  a  less  developed  body  of  securities  laws  as  compared  to  the  United
States,  and  provides  significantly  less  protection  to  investors.  Further,  Antigua  and  Barbuda’s  body  of  securities  law,  and  the  experience  of  its  courts  in
addressing  corporate  and  securities  law  issues  of  a  type  often  experienced  by  public  companies,  is  likely  less  developed  than  that  of  some  of  the  other
jurisdictions where publicly traded China-based companies are incorporated, such as the Cayman Islands. 

It may be difficult or impossible for you to bring an action against us or our directors or officers in Antigua and Barbuda or to enforce or protect your rights
under U.S. securities laws or otherwise. Even if you are successful in bringing an action of this kind, you may be unable to enforce a judgment against our assets
or the assets of our directors and officers under the laws of Antigua and Barbuda. 

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There is doubt as to whether Antigua and Barbuda courts would enforce judgments of United States courts obtained in actions against us or our directors or
officers that are predicated upon the civil liability provisions of the Securities Act, or in original actions brought against us or such persons predicated upon the
Securities Act. There is no treaty in effect between the United States and Antigua and Barbuda providing for such enforcement, and there are grounds upon
which Antigua and Barbuda courts may not enforce judgments of United States courts. In addition, Antigua and Barbuda corporations may not have standing to
initiate a shareholder derivative action before the federal courts of the United States. 

PRC  courts  may  recognize  and  enforce  foreign  judgments  in  accordance  with  the  requirements  of  the  PRC  Civil  Procedures  Law  based  either  on  treaties
between  the  PRC  and  the  country  where  the  judgment  is  made  or  on  reciprocity  between  jurisdictions.  If  there  are  no  treaties  or  reciprocity  arrangements
between the PRC and a foreign jurisdiction where a judgment is rendered, matters relating to the recognition and enforcement of the foreign judgment in the
PRC may be resolved through diplomatic channels. The PRC does not have any treaties or other arrangements with the United States or Antigua and Barbuda
that provide for the reciprocal recognition and enforcement of foreign judgments. As a result, it is generally difficult to enforce in the PRC a judgment rendered
by a U.S. or Antigua and Barbuda court. 

As a result of all of the above, as well as the fact that substantially all of our property, assets and operations are located in China and all of our directors and
officers and substantially all of their assets are located outside of the United States, you may be unable to protect your shareholder interests through actions
against us or our management, directors or major shareholders. 

We may be adversely affected by the final outcome of the administrative proceedings brought by the SEC against Ernst & Young Hua Ming LLP and other
accounting firms in China. 

In  December  2012,  the  SEC  initiated  administrative  proceedings  against  the  China  affiliates  of  five  accounting  firms,  including  our  independent  registered
public accounting firm, Ernst & Young Hua Ming LLP, alleging that they refused to produce audit work papers and other documents related to certain China-
based  companies  under  investigation  by  the  SEC  for  potential  accounting  fraud,  and  thus  violated  U.S.  securities  laws  and  SEC  rules  and  regulations.  On
January 22, 2014, an SEC administrative law judge ruled in favor of the SEC, issuing an initial decision which censured each of the accounting firms for failure
to provide their audit work papers to the SEC and ordered a six-month suspension of Ernst & Young Hua Ming LLP’s and the other China-based affiliates of the
Big Four accounting firms’ right to practice before the SEC. On February 12, 2014, four of these China-based accounting firms appealed to the SEC against this
decision.  In  February  2015,  each  of  the  four  China-based  accounting  firms  agreed  to  a  censure  and  to  pay  a  fine  to  the  SEC  to  settle  the  dispute  and  avoid
suspension of their ability to practice before the SEC. The firms’ ability to continue to serve all their respective clients is not affected by the settlement. The
settlement stays the current proceeding for four years, during which time the firms are required to follow detailed procedures to seek to provide the SEC with
access  to  Chinese  firms’  audit  documents  via  China  Securities  Regulatory  Commission.  If  a  firm  does  not  follow  the  procedures,  the  SEC  could  impose
penalties  such  as  suspensions,  or  it  could  restart  the  administrative  proceedings  or  commence  a  new,  expedited  administrative  proceeding  against  the  non-
compliant firm. The settlement did not require the firms to admit to any violation of law and preserves the firms’ legal defenses in the event the administrative
proceeding is restarted. 

In  the  event  that  the  SEC  restarts  the  administrative  proceedings,  depending  upon  the  final  outcome,  listed  companies  in  the  United  States  with  major  PRC
operations  may  find  it  difficult  or  impossible  to  retain  auditors  in  respect  of  their  operations  in  the  PRC,  which  could  result  in  financial  statements  being
determined  to  not  be  in  compliance  with  the  requirements  of  the  Exchange  Act,  including  possible  delisting.  Moreover,  any  negative  news  about  the
proceedings  against  these  audit  firms  may  cause  investor  uncertainty  regarding  China-based,  United  States-listed  companies  and  the  market  price  of  our
common shares may be adversely affected. 

If, as a result of this or any other action, the SEC suspends the right of Ernst & Young Hua Ming LLP to practice before the SEC, our ability to file financial
statements  in  compliance  with  SEC  requirements  could  be impacted.  If  none  of  the  China-based  auditors  are  able  to  continue  to  act as  auditors for  Chinese
companies listed in the U.S., we may not be able to meet the reporting requirements under the Exchange Act, which may ultimately result in our deregistration
by the SEC and delisting from the NASDAQ Stock Market, which would substantially reduce or effectively terminate the trading of our common shares in the
United States. Moreover, any negative news about the proceedings against these audit firms may erode investor confidence in China-based, United States listed
companies and the market price of our common shares may be adversely affected. 

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We and our investors may be adversely affected by the inability of the Public Company Accounting Oversight Board, or the PCAOB, to carry out inspections
of Ernst & Young Hua Ming LLP and other accounting firms in China. 

Under  the  Sarbanes  Oxley  Act,  auditors  of  companies  whose  shares  are  publicly  traded  in  the  United  States,  including  our  independent  registered  public
accounting  firm,  Ernst  &  Young  Hua  Ming  LLP,  are  required  to  register  with  the  PCAOB  and  to  undergo  regular  inspections  by  the  PCAOB  to  assess
compliance  with  applicable  U.S.  legal  and  accounting  professional  standards.  As  the  PCAOB  is  currently  unable  to  conduct  inspections  in  China,  Ernst  &
Young Hua Ming LLP has not yet been inspected by the PCAOB. PCAOB inspections of other audit firms in other jurisdictions have identified deficiencies in
the  audit  and  quality  control  procedures  of  those  firms,  which  may  be  addressed  to  improve  future  audit  quality.  The  inability  of  the  PCAOB  to  conduct
inspections of independent registered public accounting firms operating in China makes it more difficult to evaluate the effectiveness of our auditor’s audit or
quality control procedures. As a result, investors in our common shares may have less confidence in our publicly reported financial information and procedures
and the quality of our financial statements. In addition, the PCAOB may choose to impose sanctions or take other actions against Ernst & Young Hua Ming
LLP, including suspending or revoking Ernst & Young Hua Ming LLP’s registration with the PCAOB. If Ernst & Young Hua Ming LLP and other China-based
auditors are unable to maintain registration with the PCAOB, we may be unable to meet the ongoing reporting requirements under the Exchange Act, which
ultimately may result in the termination of the registration of our common shares and ordinary shares under the Exchange Act or the delisting of our common
shares from NASDAQ, or both, which would substantially reduce or effectively terminate the trading of our common shares in the United States. 

ITEM 4. INFORMATION ON THE COMPANY 

A. History and Development of the Company

Our  legal  and  commercial  name  is  Sinovac  Biotech  Ltd.  Our  principal  executive  offices  are  located  at  No.  39,  Shangdi  Xi  Road,  Haidian  District,  Beijing
100085, PRC. Our telephone number at this address is +86-10-8289-0088. Our registered address is located at The Colony House, 41 Nevis Street, St. John’s in
Antigua  and  Barbuda.  Our  agent for service  of process in the United  States is  Law  Debenture  Corporate Services  Inc., located at  400 Madison Avenue,  4th
Floor, New York. 

We are a holding company and conduct our business in China through our 73.09% majority-owned subsidiary Sinovac Beijing, our wholly owned subsidiary
Sinovac  R&D,  55%-owned  joint  venture  Sinovac  Dalian,  our  wholly  owned  subsidiary  Sinovac  Biomed  and  Sinovac  Hong  Kong.  Sinovac  Beijing  was
incorporated on April 28, 2001, Sinovac R&D was incorporated on May 7, 2009, Sinovac Dalian was established on January 19, 2010, Sinovac Biomed was
incorporated on April 16, 2015 and Sinovac Hong Kong was incorporated on October 21, 2008. 

We were incorporated in Antigua and Barbuda on March 1, 1999 as an Antiguan company with limited liability under the laws of Antigua and Barbuda. Before
we adopted our current name on October 21, 2003, we were called Net-Force System Inc. and were primarily engaged in the online gaming business. We were
quoted  on  the  OTC  Bulletin  Board  on  February  21,  2003.  In  September  2003,  we  issued  ten  million  new  shares  to  Lily  Wang,  one  of  our  then  principal
shareholders  to  acquire  a  51%  equity  interest  in  Sinovac  Beijing.  Ms.  Wang  had  contracted  to  purchase  these  shares  from  certain  of  Sinovac  Beijing’s  then
shareholders for cash immediately before the above 51% share transfer. However, this 51% equity interest in Sinovac Beijing was transferred to us directly from
those shareholders  and was recorded  under  applicable PRC law  transfer documents  as  a  cash transaction.  Lily Wang  was  responsible  for  paying  the  cash  to
those shareholders. The transfer of the Sinovac Beijing equity interest to us was registered and approved by PRC government authorities in August 2004. In
September  2004,  we  acquired  an  additional  20.6%  equity  interest  in  Sinovac  Beijing  for  approximately  $3.3  million  in  cash.  In  October  2011,  we  further
acquired an additional 1.53% equity interest in Sinovac Beijing through contributing the dividends declared to Sinovac Hong Kong but unpaid in amount of
RMB18.6 million ($2.9 million). We currently own 73.09% of the equity interest in Sinovac Beijing. 

In January 2004, we entered into a share purchase agreement with Heping Wang and issued him 3.5 million of our common shares and a promissory note in the
amount of $2.2 million to acquire from him a 100% equity interest in Tangshan Yian. Mr. Wang had contracted to purchase these shares from Tangshan Yian’s
then two shareholders immediately before the above 100% share transfer. However, this 100% equity interest in Tangshan Yian was transferred to us directly
from those shareholders and was recorded under applicable PRC law transfer documents as a cash transaction. Heping Wang was responsible for paying the
cash to the two shareholders. The transfer of the Tangshan Yian equity interest by Mr. Wang to us was registered and approved by PRC government authorities
in November 2004. 

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In  the  first  quarter  of  2008,  we  issued  and  sold  an  aggregate of  2.5  million  common  shares  at  $3.90  per  share  to  Sansar  Capital  Management.  We  received
approximately $9.75 million in gross proceeds from this private placement of our common shares. 

In October 2008, we established Sinovac Hong Kong, a wholly owned subsidiary focused primarily on registering and distributing current and newly-developed
vaccine  products  in  Hong  Kong  and  exporting  our  products  abroad.  In  addition,  Sinovac  Hong  Kong  seeks  research  and  development  collaboration
opportunities with third parties in Hong Kong. 

In November 2009, we entered into an agreement with Dalian Jin Gang Group to establish Sinovac Dalian. In January 2010, we established Sinovac Dalian
which focuses on the research, development, manufacturing and commercialization of live attenuated vaccines, such as varicella and mumps vaccines for human
use. Pursuant to the joint venture agreement, we made an initial cash contribution of RMB60.0 million ($9.3 million) in exchange for a 30% equity interest in
Sinovac  Dalian and Dalian  Jin Gang  Group  made an  asset  contribution of  RMB140.0 million ($21.6 million),  including  manufacturing facilities,  production
lines and land use rights, in exchange for the remaining 70% interest in Sinovac Dalian. In December 2010, we purchased an additional 25% equity interest in
Sinovac Dalian from Dalian Jin Gang Group with a consideration of RMB50.0 million ($7.7 million). We and Dalian Jin Gang Group currently own 55% and
45% equity interests in Sinovac Dalian, respectively. 

In  February  2010,  we  closed  a  public  offering  of  our  common  shares.  We  issued  and  sold  11.5  million  common  shares  at  the  price  of  $5.75  per  share.  We
received net proceeds of approximately $61.8 million, after deducting underwriting discounts and commissions and offering expenses payable by us. 

In February 2010, we entered into an agreement to acquire buildings, land use rights and utility facilities in Changping District, Beijing for a total consideration
of  approximately  RMB123.6  million  ($19.1  million).  We  have  paid  off  the  consideration.  We  have  completed  the  construction  of  a  new  warehouse,  a  new
filling and packaging line and a production line for EV71 vaccine in compliance with the new GMP standards. 

In 2013, we increased the capital investment to Tangshan Yian with the total amount of $4 million that was borrowed by Tangshan from us in 2010. In the same
year, we lent Tangshan Yian $1 million to be used for sales and marketing spending and other corporate purposes operational activities. In 2014, the board of
directors passed a resolution to increase capital contribution to Sinovac Dalian in the amount of RMB80.0 million ($12.3 million), which will increase Sinovac’s
equity ownership from 55% to 68%. RMB50.0 million ($7.7 million) was provided through foreign debt first with the expectation of a debt to equity swap of
the total amount after the remaining RMB30.0 million ($4.6 million) is provided to Sinovac Dalian. 

In April 2015, Sinovac established Sinovac Biomed Co., Ltd., which is 100% owned by Sinovac Biotech (Hong Kong) Ltd. Sinovac Biomed Co., Ltd. focuses
on the distribution of vaccine products as well as providing consulting services in the vaccination industry. 

In December 2015, Sinovac entered into an equity interest transfer agreement with Beijing Kuai Le Xing Biotech Co., Ltd. to transfer Sinovac’s 100% equity
interest in Tangshan Yian Biological Engineering Co., Ltd. to Beijing Kuai Le Xing Biotech Co., Ltd. for a consideration of RMB13.0 million ($2.0 million).
As of the date of this annual report, we have received RMB11.0 million ($1.7 million) and will receive the remaining RMB2.0 million ($0.3 million) within two
years of the contract signing date. As a result, Tangshan Yian’s operating results and cash flows are presented as discontinued operations in Sinovac’s financial
results, and Tangshan Yian’s assets and liabilities are presented as held for sale in Sinovac’s financial results. 

On January 30, 2016, Sinovac received a preliminary non-binding proposal letter from Mr. Weidong Yin, our chairman, president and chief executive officer,
SAIF Partners IV L.P. and/or its affiliates, to acquire all of our outstanding common shares not owned by them or their affiliates for $6.18 in cash per common
share.  The  Board  has  formed  a  special  committee  consisting  of  three  independent  directors,  Mr.  Simon  Anderson,  Mr.  Yuk  Lam  Lo  and  Mr.  Meng  Mei,  to
consider the proposal. On February 4, 2016, the special committee received a competing non-binding proposal letter, dated February 3, 2016, from a consortium
comprised of PKU V-Ming (Shanghai) Investment Holdings Co., Ltd., Shandong Sinobioway Biomedicine Co., Ltd., CICC Qianhai Development (Shenzhen)
Fund Management Co., Ltd., Beijing Sinobioway Group Co., Ltd., Heng Feng Investments (International) Limited and Fuerde Global Investment Limited, to
acquire all of our outstanding common shares for $7.00 in cash per common share. On April 13, the special committee engaged Duff & Phelps (Duff & Phelps,
LLC and Duff & Phelps Securities, LLC) as its financial advisor to assist it in this process. The special committee has also appointed Weil, Gotshal & Manges
as  its  U.S.  legal  counsel,  and  Leslie-Ann  Brissett  Legal  Services  as  its  Antigua  counsel.  The  special  committee  will  carefully  consider  and  evaluate  both
proposals and other alternative proposals with the assistance of the special committee’s independent advisors appointed. 

32

  
  
  
  
  
  
  
  
  
  
  
 
In March 2016, we adopted the Rights Plan. Pursuant to the Rights Plan, subject to limited exceptions, upon (i) a person or group obtaining ownership of 15%
or more of our common shares or (ii) the commencement or announcement of an intention to make a tender offer or exchange offer, the consummation of which
would  result  in  the  beneficial  ownership  by  a  person  or  group  of  15%  or  more  of  our  common  shares,  in  each  case,  without  the  approval  of  our  board  of
directors, each Right will entitle the holders, other than the Acquiring Person, to buy, at an exercise price of $30.00, one one-thousandth of a share of our newly
created series A junior participating preferred shares, or the Series A Preferred Shares. Holders are entitled to receive, in lieu of each one one-thousandths of a
Series A Preferred Share, common shares having a market value at that time of twice the Right’s exercise price. Our board of directors is entitled to redeem the
Rights at $0.001 per Right at any time before the Rights are exercisable. We refer to the person who acquired 15% or more of the outstanding common shares of
the Company as the “Acquiring Person.” 

For additional information regarding our principal capital expenditures, see “— D. Property, Plants and Equipment.” 

Investor  inquiries  should  be  directed  to  us  at  the  address  and  telephone  number  of  our  principal  executive  offices  set  forth  above.  Our  website  is
http://www.sinovac.com. The information contained on our website does not form part of this annual report. 

B. Business Overview

We are a fully integrated China-based biopharmaceutical company that focuses on the research, development, manufacturing and commercialization of vaccines
that protect against human infectious diseases including hepatitis A, hepatitis B, seasonal influenza, H5N1 and H1N1 pandemic influenza and mumps. In 2002,
we launched our first product, Healive, which was the first inactivated hepatitis A vaccine developed, produced and marketed by a China-based manufacturer. In
2005, we received regulatory approvals for the production of Bilive in China, a combined hepatitis A and B vaccine, and Anflu, a split viron influenza vaccine.
In April 2008, we received regulatory approval for the production in China of our whole viron H5N1 pandemic influenza (avian flu) vaccine, which is the only
vaccine approved for sale to the Chinese national vaccine stockpiling program. In September 2009, we were granted a production license for Panflu.1, which
was the first approved vaccine in the world against the influenza A H1N1 virus (swine flu). In December 2011, Sinovac Dalian obtained the production license
from the CFDA for its mumps vaccine product and launched the mumps vaccine in late 2012. Our pipeline consists of various vaccine candidates in the pre-
clinical and clinical development phases in China. In December 2015, CFDA issued the new drug certificate and production license for our EV71 vaccine, and
in  January  2016,  CFDA  issued  the  GMP  certificate  for  our  EV71  vaccine.  We  also  obtained  the  approvals  to  conduct  clinical  trials  of  pneumococcal
polysaccharide vaccine, pneumococcal conjugate vaccine, rubella vaccine, varicella vaccine and sIPV, in May 2014, January 2015, December 2014, October
2015 and November 2015, respectively. 

Our Products 

We specialize in the sales, marketing, manufacturing, and development of vaccines for infectious diseases with significant unmet medical need. Set forth below
is a chart that outlines our current marketed products and those that we have developed or are developing. 

33

  
  
  
  
  
  
  
  
  
 
Pre- 
clinical

File 
IND

Obtain Clinical 
Approval from 
CFDA

Phase I  Phase II

Phase III

On sale

(1)  

(2)

(3)

Product

Healive

Bilive

Anflu

  Indication

  Hepatitis A

  Hepatitis A&B

  Influenza

Panflu Whole Viron Pandemic Influenza 

  Pandemic Influenza 

Vaccine

Virus

Split Viron Pandemic Influenza Vaccine   Pandemic Influenza 

Panflu.1

Mumps Vaccine

EV71 Vaccine

Virus

  Influenza A H1N1 virus

  Mumps

  EV71 Virus

Pneumococcal Polysaccharide Vaccine

  Pneumococcus

Pneumococcal Conjugate Vaccine

  Pneumococcus

Rubella Vaccine

Varicella Vaccine

  Rubella

  Varicella-zoster virus 

(Herpes virus 3, Human)

Sabin Inactivated Polio Vaccine

   Polio

Hep B Vaccines

Hep A&B Vaccine(4)

  Hepatitis B

  Hepatitis A&B

(1) Our Panflu whole viron pandemic influenza vaccine did not undergo phase III clinical trials because none were required by the relevant authorities in order

to receive regulatory approval.

(2) Our Panflu split viron Pandemic Influenza Vaccine did not undergo phase III clinical trials because none were required by the relevant authorities in order

to receive regulatory approval.

(3) Our mumps vaccine did not undergo clinical trials because none were required by the relevant authorities.
(4) The new generation of hepatitis A&B combined vaccine is made from our proprietary hepatitis B vaccine with higher dosage component of 10µg (pediatric

dosage) and 20µg (adult dosage).

 Healive. In May 2002, we obtained the final PRC regulatory approval for the production of Healive, the first inactivated hepatitis A vaccine developed
in  China.  The  hepatitis  A  virus,  which  is  endemic  in  China  and  other  developing  countries,  primarily  impacts  the  liver  by  causing  it  to  swell  and
preventing it  from functioning properly.  The disease is  highly contagious  and can  be  spread  by  close personal  contact, by  consuming  contaminated
food or by drinking water that has been contaminated by hepatitis A. According to the WHO, as no specific treatment exists for hepatitis A, prevention
is the most effective approach against the disease. In February 2008, the PRC government included hepatitis A vaccine into its national immunization
program, and announced plans to expand vaccination to newborns nationwide by the end of 2010. According to the NIFDC lot release records, 26.4
million  doses  of  hepatitis  A  vaccines  were  approved  and  released  in  China  for  the  year  ended  December  31,  2015.  Administered  intramuscularly,
Healive is available in different doses for use by both adults (1.0 ml per dose) and children (0.5 ml per dose). Our production line to manufacture our
hepatitis vaccines, Healive and Bilive, interchangeably has an aggregate combined production capacity of approximately 10 million doses annually. In
2015, 2014 and 2013, we sold approximately 4.1 million, 3.9 million and 4.1 million doses of Healive, which generated approximately $26.8 million,
$26.5 million and $26.4 million in revenues, respectively. Since we launched Healive in 2002, we have sold a total of approximately 49.6 million doses
as of December 31, 2015. We are selling Healive in Mongolia, Nepal and Chile.

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







Bilive.  In  June  2005,  we  obtained  the  final  PRC  regulatory  approval  for  the  production  of  Bilive,  the  first  combined  inactivated  hepatitis  A  and  B
vaccine developed and marketed in China. Bilive is a combination vaccine formulated with purified inactivated hepatitis A virus antigen, which we
manufacture, and recombinant (yeast) hepatitis B surface antigen, which we source from a third-party supplier. Bilive vaccinations must be privately
paid by the recipients under China’s current vaccination program. Bilive is designed for boost immunization or for users in the private-pay market who
prefer the convenience of one inoculation rather than two. Similar to hepatitis A, hepatitis B is endemic in China, a major disease worldwide and a
serious  global  public  health  issue.  A  substantial  percentage  of  people  infected  with  the  hepatitis  B  virus  carry  chronic  or  lifelong  infections.  The
chronically infected are at a high risk of death from cirrhosis of the liver or liver cancer. Currently, we are the only supplier in China that produce a
combined inactivated hepatitis A and B vaccine, and our market share in China, according to the NIFDC lot release records, is 100% in 2014. Bilive is
available in different doses for use in both adults and children. The 1.0 ml dose is for non-immune adults and adolescents 16 years of age and older.
The 0.5 ml dose is for pediatric use in non-immune infants, children and adolescents from one year up to and including 15 years of age. The standard
Bilive vaccination schedule consists of three doses. The second dose is administered one month after the first dose and the third dose is administered
six months after the first dose. Booster vaccinations are recommended five years after the initial immunization. Our production line to manufacture our
hepatitis vaccines, Healive and Bilive, interchangeably has an aggregate combined production capacity of approximately 10 million doses annually. In
2015, 2014 and 2013, we sold approximately 2.3 million, 2.6 million and 2.5 million doses of Bilive, which generated approximately $22.6 million,
$21.9 million and $20.8 million in revenues, respectively.

Anflu. In October 2005, we received the final approval from the CFDA to produce our Anflu vaccine against influenza. We began marketing Anflu in
September  2006.  The  primary  influenza  vaccine  used  worldwide  is  the  split  viron  vaccine,  which  contains  virus  particles  disrupted  by  detergent
treatment. The market penetration of the seasonal flu vaccine in China is significantly below that in the developed markets. We are the first Influenza
Vaccine Supply, or IVS, taskforce member from a developing country that collaborates with world-class partners in influenza vaccine research. Our
Anflu vaccine is an inactivated split viron influenza vaccine formulated from three split inactivated viron solutions. Anflu is produced with the virus
strains recommended by the WHO each year and, we believe, is the only flu vaccine, among all produced by other domestic manufacturers that do not
contain preservatives. According to the NIFDC lot release records, 34.4 million doses of influenza vaccines were approved and released in China for
the year ended December 31, 2015. Our production line to manufacture our flu vaccines, Anflu, Panflu and Panflu.1, interchangeably has an annual
production  capacity  of  approximately  8  million  doses  of  Anflu. We  sold  3.2 million,  3.4  million and  3.4  million  doses  of  Anflu in  2015,  2014  and
2013,  which  generated  approximately  $12.7  million  $12.1  million  and  $12.2  million  in  revenues,  respectively.  Our  Anflu  products  were  sold  in
Mexico, Guatemala, Mongolia, Philippines, Tajikistan, and Bangladesh.

Panflu. In April 2008, we were granted a production license for Panflu by the CFDA. Panflu is the first and only approved vaccine available in China
against the H5N1 influenza virus. The vaccine is approved for supply within China to the Chinese national vaccine stockpiling program and may not be
sold directly to the Chinese commercial market. Panflu is also registered for sale in the Hong Kong market. Our production line to manufacture our flu
vaccines, Anflu,  Panflu and Panflu.1, interchangeably has an annual production capacity of approximately 20  million doses of Panflu or 20 million
doses  of  Panflu.1  given  the  yield  of  virus  strain  received  from  WHO.  We  produced  Panflu  for  government  reservation  since  2008,  and  we  started
recognizing revenue in 2010. Our revenue from the sale of Panflu amounted to $3.9 million, $0.2 million and $10.7 million in 2015, 2014, and 2013,
respectively.

Panflu.1.  In  September  2009,  we  were  granted  a  production  license  for  Panflu.1  by  the  CFDA.  Panflu.1  is  the  first  approved  vaccine  in  the  world
against the influenza A H1N1 virus. The outbreaks of influenza A H1N1 was caused by a new virus that had not been seen previously in either human
beings or animals. According to the NIFDC lot release records, we were ranked number two in market share in China in 2009 and number three in
2010.  Our  production  line  to  manufacture  our  flu  vaccines,  Anflu,  Panflu  and  Panflu.1,  interchangeably  has  an  annual  production  capacity  of
approximately 20 million doses of Panflu or 20 million doses of Panflu.1. We started to sell Panflu.1 in September 2009. Our revenue from Panflu.1
amounted to approximately $14 million in 2011, and Panflu.1 is not likely to generate revenues in the foreseeable future. Panflu.1 is also registered for
sale in Mexico.

35

  
  
  
  
  
  
 
 Mumps  vaccine.  Mumps  is  a  viral  disease  of  the  human  species  caused  by  mumps  virus,  which  poses  a  significant  threat  to  human  health  in  the
developing countries. According to the NIFDC release records, 5.3 million doses of mumps vaccines were approved and released for the year ended
December 31, 2015. In September 2012, we were granted a production license for mumps vaccine. We began to sell mumps vaccine in December of
2012 and no revenues were recognized in 2012. We sold approximately 1.2 million doses, 1.7 million doses and 1.2 million doses of mumps vaccine in
2015, 2014 and 2013, respectively, which generated approximately $1.5 million, $2.2 million and $1.7 million in revenues in 2015, 2014 and 2013,
respectively.





Split viron pandemic influenza vaccine. Our split viron pandemic influenza vaccine has been developed in conjunction with our whole viron pandemic
influenza vaccine. Split viron vaccines are considered to have a better safety profile than whole viron vaccines, both of which are for the governmental
stockpiling program. This product has been developed to address the needs of young children, who may be more susceptible to adverse reactions to
whole  viron  pandemic  influenza  vaccine  than  to  a  split  viron  vaccine.  In  November  2011,  we  were  granted  the  production  license  of  split  viron
pandemic influenza vaccine that is to be used among the teenagers aged from 12 to 17.

EV71 vaccine. EV71 causes HFMD among children under ten years old. HFMD is a common and usually mild childhood disease; however, HFMD
caused by EV71 has shown a higher incidence of neurologic involvement, and a higher acute fatal incidence. There have been a number of outbreaks of
HFMD caused by EV71 in the Asia-Pacific region since 1997 including in China, Malaysia, Singapore, Australia, Vietnam and Taiwan. According to
the  statistics  from  National  Health  and  Family  Planning  Commission  of  China,  from  2008  to  2015,  more  than  13  million  cases  of  HFMD  were
reported,  resulting  in  around  3,337  reported  fatalities  in  China.  According  to  an  epidemiological  study,  from  2008  to  2012,  EV71  infection  caused
around 80% of the severe cases and over 90% of the fatal cases and China CDC’s data for the first months of 2014 further proved the result above.
There is no identified treatment for enterovirus infections. We started our research and development of the EV71 vaccine in 2008. In December 2009,
the  CFDA  accepted  our  application  to  commence  human  clinical  trials  and  on  December  23,  2010,  we  obtained  the  approval  from  the  CFDA  to
commence  clinical  trials.  In  2013,  we  completed  all  three  phases  of  clinical  trials,  which  showed  our  EV71  vaccine  candidate  has  good  safety  and
immunogenicity profile, and has an efficacy rate of 94.8% against HFMD among infants and young children. In February 2014, the phase III clinical
trial results of our EV71 vaccine were published online on NEJM, which showed the efficacy of the vaccine against HFMD, or herpangina, was 94.8%
among infants and young children. On December 30, 2015, the CFDA issued the new drug certificate and production license for our EV71 vaccine. On
January 25, 2016, the CFDA issued the GMP certificate for our EV71 vaccine. We have seven granted patents relating to the EV71 vaccine in China.
Our EV71 vaccine primarily targets children from six months old to three years old, with each child requiring a total of two doses one month apart
from another.

Our pipeline consists of vaccine candidates in the clinical and pre-clinical development phases in China, which is listed hereunder. 



Pneumococcal  polysaccharide  vaccine.  Pneumococcal  polysaccharide  vaccine,  or  PPV,  is  a  vaccine  used  to  prevent  streptococcus  pneumoniae
(pneumococcus) infections, such as pneumonia and septicemia among adults aged 65 or older, adults with serious long-term health problems, smokers,
and children older than two years with serious long-term health problems. We filed an application for clinical trials to the CFDA in February 2011 and
obtained the approval to commence clinical trials in May 2014. Currently, the phase III clinical trial is underway and is expected to be completed in the
first half of 2017.

36

  
  
  
  
  
  
  
 








Pneumococcal conjugate vaccine. Pneumococcal infection is a leading cause of serious illness in children and adults throughout the world. The disease
is  caused  by  a  common  bacterium,  the  pneumococcus,  which  can  attack  different  parts  of  the  human  body.  According  to  the  WHO,  pneumococcal
disease is the leading vaccine-preventable killer of children under five years old in the world. At least one million children die of pneumococcal disease
every  year,  most  of  whom  are  young  children  in  developing  countries.  Since  the  U.S.  commenced  vaccination  programs  against  this  disease,  the
pneumococcal  disease  incidence  has  decreased  by  94%  in  the  U.S.  Currently,  in  China,  there  is  only  one  imported  vaccine  product  against  this
diseases. No domestic producer has been licensed to supply this vaccine. Our pneumococcal conjugate vaccine will primarily target children two years
old or under, who number approximately 32 million in China. We obtained the clinical trials license in January 2015. Phase I clinical trial is expected
to be commenced in the second quarter of 2016.

Rubella vaccine. Rubella is a disease caused by the rubella virus and an acute infection is usually associated with the symptoms of fever and systemic
rash. The clinical trial license was granted in December 2014. Further development of this vaccine candidate depends on the progress of developing a
measles, mumps and rubella vaccine, or MMR vaccine.

Varicella  vaccine.  Varicella  is  a  highly  contagious  infectious  disease  caused  by  the  varicella-zoster  virus  (herpesvirus  3,  Human).  It  usually  affects
children, is spread by direct contact or respiratory route via droplet nuclei and is characterized by the appearance on the skin and mucous membranes of
successive crops of lesions that are easily broken and become scabbed. Varicella is relatively benign in children, but may be complicated by pneumonia
and encephalitis in adults. According to the NIFDC lot release records, 18.7 million doses of varicella vaccines were approved and released in China in
2015,  compared  to  16.6  million  doses  in  2014.  We  had  completed  the  pre-clinical  studies  of  a  human  vaccine  against  varicella.  The  clinical  trial
application  was  filed  with  CFDA  in  January  2013.  We  obtained  the  clinical  trial  license  in  October  2015.  Phase  I  clinical  trial  is  expected  to  be
commenced in the first half of 2016.

Sabin Inactivated Polio Vaccine. Poliomyelitis (polio) is a highly infectious viral disease, which mainly affects young children. The virus is transmitted
by  person-to-person  spread  mainly  through  the  fecal-oral  route  or,  less  frequently,  by  a  common  vehicle  (e.g.,  contaminated  water  or  food)  and
multiplies in the intestine, from where it can invade the nervous system and can cause paralysis. One in 200 infections leads to irreversible paralysis
(usually in the legs). Among those paralyzed, 5-10% die when their breathing muscles become immobilized. In developing countries around the globe
including China, oral polio vaccine, or OPV, is widely utilized to eradicate polio. Although OPV is considered safe and effective, in extremely rare
instances, the live attenuated vaccine virus in OPV can cause paralysis, resulting in cases of vaccine-associated paralytic polio (VAPP) or circulating
vaccine-derived  poliovirus  (cVDPVs).  Therefore,  to  eliminate  the  risk  of  such  cases,  OPV  will  be  phased  out  from  routine  immunization  programs
around the world. According to the Polio Eradication & Endgame Strategic Plan 2013-2018 by WHO, governments should complete, inactivated polio
vaccine, or IPV, introduction and OPV withdrawal by 2016, and include IPV and OPV in routine immunization by 2018. OPV will be phased out from
routine  immunization programs  around  the  world by 2020. Sabin  IPV  is  safer  to  manufacturers and  potentially  more  affordable as  compared  to the
currently available Salk IPV. The global demand for IPV is increasing as the Global Polio Eradication Initiative has called for IPV to be introduced
globally.  The  production  capability  of  IPV  in  China  proves  to  be  limited.  In  2015,  approximately  56.5  million  doses  of  polio  vaccines  released  by
National  Institute  of  Food  and  Drug  Control  only  include  7.4  million  doses  of  IPV.  On  April  3,  2014,  we  entered  into  a  non-exclusive  license
agreement with The Institute for Translational Vaccinology, or INTRAVACC, a governmental institute working under the Dutch Ministry of Public
Health, Welfare and Sports, to develop and commercialize sIPV for distribution in China and other countries. In collaboration with INTRAVACC, we
have completed the pre-clinical study and submitted the application for clinical trials to CFDA in October 2014. In November 2015, the clinical trial
license was obtained. Phase I/II clinical trials are expected to be commenced in the first half of 2016.

 Hepatitis B vaccine. Hepatitis B is a potentially life-threatening liver infection caused by the hepatitis B virus. It is a major global health problem. It
can  cause  chronic  liver  disease  and  chronic  infection  and  puts  people  at  high  risk  of  death  from  cirrhosis  of  the  liver  and  liver  cancer.  We  have
completed pre-clinical studies and filed clinical trial application in December 2014.



New generation of hepatitis A & B vaccine. The new generation combination vaccine will contain a higher dosage of the hepatitis B component, 10µg
and 20µg for pediatric and adult formulations, respectively, to enhance the vaccine’s immunogenicity. Sinovac is developing a new generation of its
hepatitis A&B combination vaccine based on its individual hepatitis A and B vaccines. We have completed the pre-clinical studies and filed clinical
trial application in late December of 2014.

37

  
  
  
  
  
  
  
  
 
Research and Development 

We  have  established  a  leadership  position  in  the  research  and  development  of  vaccines  in  China.  Since  our  inception,  we  have  successfully  developed  and
marketed  Healive,  Bilive,  Anflu,  Panflu,  Panflu.1,  mumps  vaccine,  and  have  made  significant  advances  in  the  prevention  of  SARS.  Please  see  “—  Our
Products”. We believe our R&D capabilities provide us with a key competitive advantage. We intend to continue to focus our research and development efforts
on developing vaccines for infectious diseases with significant unmet medical needs, as well as the vaccine products with extensive market demand in China
and other developing countries. 

In 2008, we restructured our R&D team in Beijing to better utilize our scientific and personnel resources. In 2009, we built an R&D center of approximately
13,300  square  feet  in  the  campus  of  our  Beijing  headquarters  to  meet  our  R&D  demand.  In  2011,  we  built  a  lab  of  6,778  square  feet,  which  is  focused  on
maintaining quality control of our pipeline products. 

In order to achieve our R&D goal, part of our R&D strategy is to focus on in-house development and to establish collaborations with domestic and international
partners on technology and virus strains licensing. We have entered into collaborations with a group of leading universities, colleges and research institutes that
have strong vaccine research capabilities and proven track records in China. In most cases, we will own the commercial rights to the products that result from
our existing R&D strategic collaborations. 

The continuous investment in R&D is one of our strategies, which, we believe, will ensure our future growth. Our research and development expenses were $9.5
million,  $10.9  million  and  $8.1  million  in  2015,  2014  and  2013,  respectively.  We  have  obtained  financial  support  from  the  PRC  government  to  conduct
preclinical and clinical research of vaccines for government-sponsored programs. 

Sales and Marketing 

Our  sales  strategy  is  to  maintain  our  market  share  and  competitive  advantage  in  the  private  vaccine  sales  market  in  China  while  leveraging  this  strength  to
expand market share in the government-paid market. 

Although the overall vaccine market environment is challenging in 2015, total sales of our regular products increased 1.3% year over year. 

We  primarily  rely  on  our  own  sales  force  to  sell  our  products  directly  to  CDCs  in  the  private  market.  As  of  December  31,  2015,  our  in-house  sales  and
marketing team consisted of 172 staff members located in 31 provinces and four municipal cities throughout China. We enter into sales agreements with CDCs
each time a CDC places a purchase order. Pursuant to the sales agreements, CDCs agree not to re-sell our products to regions outside the territory the pertinent
CDC covers administratively. Our sales team maintains stable relationships with our customers by providing them with technical supports and trainings. We
believe these efforts have contributed to our reputation for quality and brand awareness in the Chinese vaccine market. 

We  intend  to  establish  our  presence,  increase  our  sales  to  international  markets  and  enhance  awareness  of  our  products  outside  of  China.  Our  products  are
currently registered in Hong Kong, Mexico, Nepal, Philippines, Mongolia, Chile, Guatemala, Bangladesh and Salvador. We have already exported some of our
products  to  eight  countries,  including  Mongolia,  Mexico,  Philippines,  Nepal,  Tajikistan,  Bangladesh,  Chile  and  Guatemala.  We  will  continue  to  explore  the
globalization of our portfolio and develop products targeting other potential international markets where we believe we can be successful. 

Seasonality 

Our business is highly seasonal. For example, the influenza season generally runs from November through March of the next year, and the largest percentage of
influenza vaccinations is administered between September and November of each year. As a result, we expect to realize most of our annual revenues from Anflu
during  this  period.  You  should  expect  this  seasonality  in  our  business  to  contribute  to  significant  quarterly  fluctuations  in  our  operating  results.  In  the  first
quarter, our strong winter-season sales are usually offset by the slow-down of business during the Chinese New Year holiday season that effectively lasts more
than half a month. During this holiday season, many businesses in China, including CDCs and most departments in hospitals, are either closed or substantially
reduce  the  level  of  their  activities.  Please  see  “Item  3.  Key  Information  —  D.  Risk  Factors  —  Risks  Related  to  Our  Company  —  Our  business  is  highly
seasonal. This seasonality will contribute to our operating results fluctuating considerably throughout the year.” 

38

  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
Suppliers 

We obtain the raw materials from local and overseas suppliers. We generally maintain at least two suppliers for each key raw material, with the exception of
hepatitis B antigens we use for Bilive production. We source hepatitis B antigens entirely from Beijing Temple of Heaven. Please see “Item 3. Key Information
— D. Risk Factors — Risks Related to Our Company — If any of our third-party suppliers or manufacturers cannot adequately meet our needs, our business
could be harmed.” Raw materials generally are in good supply and the prices we pay for them remain stable. We target to maintain our gross margin in the event
of rising raw materials costs by improving our production processes and technical methods. 

Manufacturing, Safety and Quality Assurance 

We have three manufacturing bases located in Haidian and Changping Districts of Beijing and Dalian City of Liaoning province. 

We have two upstream production facilities in Haidian District, Beijing for commercialized products. Our Healive and Bilive share the same production line,
which has an aggregate annual capacity of 10 million doses. Our Anflu production line has an annual capacity of 8 million doses, which can also be used to
produce 20 million doses of Panflu or Panflu.1 annually. Our Healive, Bilive and Anflu production facilities received their GMP certificates initially in March
2002, June 2005 and October 2005, respectively, and renewed their GMP certificates for another five years in 2008, 2010 and 2010, respectively. The upstream
production plants for our hepatitis vaccines and flu vaccines in Haidian District have passed the new GMP certification and obtained the new GMP certificate on
April 17, 2013. We also have vaccine production facilities under construction at Haidian site now. 

We have built a new production site in Changping District, Beijing, which comprises a new filling and packaging line that complies with the new PRC GMP
standards, EV71 production facilities and a warehouse. The EV71 vaccine production line has a designed annual capacity of 20 million doses and was granted
the GMP certificate in January 2016. 

Our  production  site  in  Sinovac  Dalian  focuses  on  the  research,  development,  manufacturing  and  commercialization  of  live-attenuated  vaccines,  such  as
varicella,  mumps  and  combination  vaccines  containing  measles,  mumps,  rubella,  and/or  varicella.  Sinovac  Dalian  has  received  its  GMP  certificate  (2010
version) from the CFDA for its mumps vaccine in September 2012 and launched mumps vaccine, its first commercial product in late 2012. The production line
for the varicella vaccine is under construction. 

Each of our subsidiaries has its own quality assurance departments. The quality assurance department of each subsidiary plays a role to supervise the R&D,
manufacturing,  procurement,  quality  control,  sales  and  marketing,  logistics  and  plant  construction  of  its  own  subsidiary  under  the  guidance  of  relating
regulations  and  guidelines.  Regular  trainings  or  seminars  are  organized  among  quality  assurance  departments  of  each  subsidiary  to  share  and  exchange
knowledge and experiences. 

Sinovac has built a pharmacovigilance system. Pharmacovigilance system includes organization structure, documentation, working procedures and SOPs. The
organization  structure  indicates  staff  and  relevant  responsibilities.  According  to  requirements  of  authorities,  we  report  the  severe  Adverse  Event  Following
Immunization, or AEFI, in time and regularly. We summarize and analyze all safety information coming from post-marketing surveillance, phase IV clinical
trials,  safety  studies  and  literatures,  to  make  the  risk-benefit  evaluation  annually,  and  to  submit  the  PSUR  (Periodic  Safety  Update  Reports)  to  authorities
regularly. Meanwhile, we are required to assist authorities to investigate on the AEFIs and provide the information as required. 

Collaborations 

In September 2015, Sinovac Dalian entered into a technology transfer and supply agreement with GSK, to use GSK’s measles seeds to develop combination
vaccines containing measles for the China market. Under this agreement, GSK agreed to transfer its measles seeds, provide reasonable assistance and relevant
technical materials to Sinovac Dalian for the purpose of developing and producing combination vaccines containing measles. 

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On April 3, 2014, we entered into a non-exclusive license agreement with INTRAVACC, a governmental institute working under the Dutch Ministry of Public
Health,  Welfare  and  Sports,  to  develop  and commercialize  sIPV  for  distribution  in  China  and  other  countries. We  expect  to  develop  and  commercialize  the
vaccine in China, as well as seeking regulatory approval in other countries. The agreement has a term of 50 years. Please see “— Our Products”. 

We  agreed  to  pay  INTRAVACC  license  fee  of  up  to  $2,406  million  (€1.5  million)  net  of  PRC  withholding  tax,  including  an  entrance  fee  and  milestone
payments upon achieving specific milestones. We also agreed to pay royalty payments in a single digit percentage of net sales generated worldwide from the
product or products developed under the license agreement. We recorded an entrance fee of $0.7 million (€0.5 million) excluding PRC withholding tax for the
year ended December 31, 2014 as research and development expense. We also recorded $0.1 million (€0.1 million) for payment made to INTRAVACC for use
of sIPV viral seeds in research and development expense for the year ended December 31, 2014. No payments were made in 2015. 

We  licensed  from  MedImmune,  LLC,  or  MedImmune,  certain  rights  to  use  patented  reverse  genetics  technology  pertaining  to  virus  strain  used  for  the
production  of  Panflu  (H5N1).  We  have  agreed  to  pay  an  upfront  license  fee  and  to  pay  milestone  payments  of  up  to  an  aggregate  of  $9.9  million  upon  the
achievement of certain amount of cumulative net sales of licensed products in China (including Hong Kong and Macau), as well as royalty payments in single
digits  of  net  sales  of  the  licensed  products  in  China  (including  Hong  Kong  and  Macau).  On  August  15,  2012,  we  entered  into  amendment  agreements  with
MedImmune in respect of four of our patent license agreements with MedImmune to, among other things, extend the effectiveness of each agreement to reflect
revised termination dates between December 2015 and May 2021. We accrued license fee and royalties of $3.4 million at the end of 2011 which were paid in
2012. We did not make any royalty payment in 2013 but made a $0.9 million royalty payment in May 2014. No royalties were incurred or paid for the year
ended December 31, 2015. 

In  March  2009,  we  entered  into  a  technology  transfer  agreement  with  Tianjin  CanSino  Biotechnology  Inc.  or  Tianjin  CanSino,  a  third  party  company,  to
develop a 7-valent pneumococcal conjugate vaccine. According to the agreement, Tianjin CanSino will transfer the technology of a pneumococcal vaccine to us.
The collaboration term under the technology transfer agreement is from the signing date to eight years after the first sales of the vaccine developed under the
technology transfer agreement in the Chinese market. Under this technology transfer agreement, we agreed to make milestone payments of up to $3 million and
royalty  payment  ranging  from  6%  to  10%  for  the  net  sales  in  the  Chinese  market.  Each  of  the  future  milestone  payments  is  subject  to  certain  conditions,
including the PRC government approvals at different stages, which are uncertain. We also agreed to make royalty payments for eight years after the first sales of
the vaccine developed under the technology transfer agreement in the Chinese market. The sales of the pneumococcal vaccine in the Chinese market are also
subject to the PRC government approval. Both parties agreed to work together to develop international markets for the products. On November 9, 2009 and
December  14,  2011,  we  entered  into  two  amendments  to  the  technology  transfer  of  another  six  serotypes  and  related  technology  to  us  for  $0.3  million  to
develop a 13-valent pneumococcal conjugate vaccine. On January 29, 2015, we entered into the third amendment to the technology transfer agreement dated
March  12,  2009  and  the  first  two  amendment  agreements  dated  November  17,  2009  and  December  24,  2011.  By  entering  into  this  third  amendment,  the
technology  agreement  was  revised  to  be  a  licensing  agreement.  The  remaining  milestone  payments  under  the  agreements  were  reduced.  Both  Sinovac  and
Tianjin CanSino are free to develop PCV vaccines or to collaborate with one other company for the same purpose. As of December 31, 2015, we made total
milestone payments of $1.5 million ($1.0 million under the March 2009 agreement, $0.2 million under the November 2009 and December 2011 amendments,
and $0.3 million under the January 2015 amendments). 

On August 18, 2009, we entered into a patent license agreement with the National Institutes of Health, or NIH, an agency of the United States Public Health
Services within the Department of Health and Human Services. NIH has granted us a non-exclusive license to make and use certain of its products. NIH has also
granted us the right to use certain associated information for development of its licensed products. The collaboration term under the patent license agreement is
from August 18, 2009 to the later of (a) the expiration of all royalty obligations under the licensed rights where such rights exist and (b) eight years after the first
commercial sale by  us, unless  the agreement  is terminated earlier  per  the provisions  included therein.  We agreed  to  pay  NIH  a  license  issue royalty  of $0.1
million  upon execution  of the agreement and a non-refundable minimum  annual royalty of $8,000, and royalty payments on net sales  ranging from 1.5% to
4.0% depending on the sales territory and the customers. We also agreed to pay NIH benchmark royalties of $0.3 million upon achieving each benchmark as
specified in the patent license agreement, including completion of clinical trials, obtaining regulatory approval for marketing, and achievement of commercial
sales. 

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In  December  2004,  we  signed  a  pandemic  influenza  vaccine  co-development  agreement  with  China  CDC  to  jointly  develop  a  pandemic  influenza  vaccine.
Pursuant  to  this  co-development  agreement,  we  agreed,  among  other  things,  to  conduct  pandemic  influenza  vaccine  R&D  based  on  our  established  vaccine
R&D technical platform and to apply for the new drug certificate, production license and patents for the pandemic influenza vaccine. China CDC agreed, among
other  things,  to  strategize  development  of  the  pandemic  influenza  vaccine,  provide  us  with  scientific  guidance  to  vaccine  technicalities  and  conduct  certain
pandemic  related  research  and  vaccine  development-related  analysis  and  testing.  Both  parties  agreed  to  be  responsible  for  certain  specified  expenditures
associated with the vaccine development and to jointly apply for government R&D funds. However, the co-development agreement expressly provides that we
will be the applicant for and owner of the future new drug certificate, production license and any patent or know-how in connection with the pandemic influenza
vaccine. In return, we have agreed to fund and support China CDC’s influenza-related investigation and other pandemic control efforts after we gain profits
from the sale of pandemic influenza vaccines. The regulatory approval for production of our whole viron pandemic influenza vaccine was obtained in April
2008. 

Competition 

The pharmaceutical, biopharmaceutical and biotechnology industries both within China and globally are intensely competitive and are characterized by rapid
and significant technological progress, and our operating environment is increasingly competitive. In recent years, the CFDA increased the quality standard of
some vaccine products by issuing a new version of Pharmacopeia. As a result, some vaccine products manufactured by multinational companies can no longer
be  sold  in  China.  According  to  the  CFDA,  there  are  approximately  40  vaccine  companies  in  China,  of  which  we  believe  approximately  ten  are  our  direct
competitors.  In  addition,  multinational  companies  have  started  to  localize  their  vaccine  production  in  China,  which  is  expected  to  further  intensify  the
competition. 

Even with the advent of private medical and healthcare insurance programs in China and the government vaccine purchase program’s expanded vaccine list,
most Chinese citizens must pay for their own vaccines because these insurance programs do not typically cover vaccines and the government vaccine purchase
program  covers  only  infants  and  young  children.  We  believe  the  consumer  market  is  health  conscious  yet  price  sensitive  and  accordingly  would  favor  our
products  over  both  cheaper  but  not  enough  high  quality  vaccines  provided  by  local  manufacturers  and  comparable  quality  but  more  expensive  vaccines
manufactured by some of our international competitors. Our competitors, both domestic and international, include large integrated multinational pharmaceutical,
domestic state-owned entities and domestic private companies that currently engage in, have engaged in or may engage in efforts related to the discovery and
development of  new  biopharmaceuticals and vaccines.  Many of these  entities have  substantially greater research and development capabilities and financial,
scientific, manufacturing, marketing and sales resources than we do, as well as more experience in research and development, clinical trials, regulatory matters,
manufacturing, marketing and sales, although these advantages are not comprehensive. 

There are multiple vaccine products approved for sale worldwide. Many of these vaccine products are marketed by our major competitors and are in the areas of
hepatitis A, hepatitis B and influenza. Specifically, with respect to the inactivated hepatitis A vaccine, we consider Kunming Institute of Biological Product,
Sanofi Pasteur and Merck Sharp & Dohme Corp. as key competitors in the China market, and GlaxoSmithKline Biologicals, Merck Sharp & Dohme Corp. and
Changchun Institute of Biological Products for the markets outside of China. While in China, according to the batch release number published by NIFDC, over
80% of hepatitis A vaccines released in China are live attenuated vaccine, another type of hepatitis A vaccine compared to inactivated version, which is the
biggest competitor for inactivated hepatitis A vaccine. The live attenuated hepatitis A vaccine manufacturers include Kunming Institute of Biological Product,
Pukang Biological Co., Ltd., Changchun Institute of Biological Products and Changchun Changsheng Life Sciences Ltd. With respect to the hepatitis A and B
vaccines,  we  are  the  only  company  to  supply  hepatitis  A  and  B  vaccine  in  China.  With  respect  to  the  influenza  vaccines,  in  China,  we  consider  Hualan
Biological Engineering Inc., Changchun Institute of Biological Products, Sanofi Pasteur S.A., Changchun Changsheng Life Sciences Ltd., Aleph Biological Co.,
Ltd.  (Dalian  Yalifeng)  and  multinational  companies  including  GlaxoSmithKline  Biologicals,  Sanofi  Pasteur  S.A.  as  our  major  competitors  for  the  market
outside of China. With respect to the EV71 vaccines, Kunming Institute of Biological Product and we have received new drug certificate, production license and
GMP  certificate.  China  National  Biotec  Group  Co.,  Ltd.  has  filed  new  drug  application  for  EV71  vaccines.  We  consider  Kunming  Institute  of  Biological
Product and China National Biotec Group Co., Ltd. as our major potential competitors of the EV71 vaccines. 

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We believe we enjoy a number of advantages over our PRC domestic and multinational competitors. Generally, we believe that the principal competitive factors
in the markets for our products and product candidates include: 









safety and efficacy profile;

brand reputation;

product supply; and

post-sales service.

Intellectual Property and Proprietary Technology 

Protection of our intellectual property and proprietary technology is very important for our business. We rely primarily on a combination of trademark, patent
and trade secret protection laws in China and other jurisdictions, as well as employee and third-party confidentiality agreements to safeguard our intellectual
property, know-how and our brand. Our ability to protect and use our intellectual property rights in the continued development and commercialization of our
technologies and products, operate without infringing the proprietary rights of others and prevent others from infringing our proprietary rights is crucial to our
continued success. We will be able to protect our products and technologies from unauthorized use by third parties only to the extent that they are covered by
valid and enforceable patents, trademarks or copyrights, or are effectively maintained as trade secrets, know-how or other proprietary information. 

We  have  a  total  of  29  issued  patents  and  a  number  of  pending  patent  applications  relating  to  our  vaccines  in  China.  Our  hepatitis  A  vaccine  and  seasonal
influenza vaccine have five and three issued patents for protection, respectively. 

With respect to, among other things, proprietary know-how that is not patentable and processes for which patents are difficult to enforce, we rely on trade secret
protection  and  confidentiality  agreements  to  safeguard  our  interests.  We  believe  that  many  elements  of  our  vaccine  products,  clinical  trial  data  and
manufacturing processes involve proprietary know-how, technology or data that are not covered by patents or patent applications. We have taken appropriate
security  measures  to  protect  these  elements.  We  have  entered  into  confidentiality  agreements  (which  include,  in  the  case  of  employees,  non-competition
provisions) with many of our employees, consultants, outside scientific collaborators, sponsored researchers and other advisors. These agreements provide that
all confidential information developed or made known to the individual during the course of the individual’s relationship with us is to be kept confidential and
not  disclosed  to  third  parties  except  in  specific  circumstances.  In  the  case  of  our  employees,  the  agreements  provide  that  all  of  the  technology  which  is
conceived by the individual during the course of employment is our exclusive property and require our employees to assign to us all of their inventions, designs
and technologies they develop during their terms of employment with us and cooperate with us to secure patent protection for these inventions if we wish to
pursue such protection. 

We relied on administrative protection afforded new drugs through the monitoring period provided by the CFDA in the past. During the monitoring period, third
parties’  applications  for  manufacturing  or  importing  the  same  drug  are  not  accepted  by  the  CFDA.  The  administrative  protection  for  Healive  expired  in
December 2007 and Bilive expired in January 2008. We may get new drug protection for new products to be commercialized in China through the same way. 

We maintain 20 registered trademarks in China, including (i) Sinovac, (ii) Sinovac’s Chinese name and its logo, (iii) Healive, its Chinese name and its logo, (iv)
Bilive and its Chinese name, (v) Anflu and its Chinese name, (vi) Panflu, its Chinese name and its logo, (vii) PANFLU.1 and its Chinese name, (viii) Chinese
name of EV71 vaccine and (ix) EV71Vac and EntV71. We have registered “Sinovac” trademark in Canada, Malaysia, Philippines and the United States. We
have registered “Sinovac” as trademarks under the “Madrid international trademark registration system,” which can be used in the member countries of Madrid
Union,  including  France,  United  Kingdom  and  Germany.  Since  the  “Sinovac”  trademark  certificates  of  Columbia,  India  and  Thailand  have  already  been
expired, we now deal with their renewal procedures. 

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We currently use “科兴” (Kexing) as part of Sinovac Beijing’s Chinese trade name in the PRC. We also use “科兴” (Kexing) as part of the Chinese trade name
of Sinovac Dalian in the PRC. Shenzhen Kexing currently owns the “科兴” trademark registered in China for Class 5 (Pharmaceuticals) under the International
Classification of Goods and Services. To protect our interest in using “科兴” in our trade name, we applied to register “科兴” in China for Class 42 (Scientific
&  Technological  Services  &  Research)  in  2006  and  the  PRC  Trademark  Office  of  the  State  Administration  for  Industry  and  Commerce  approved  our
application in 2010. The “科兴” trademark owned by Shenzhen Kexing has not been identified as “Well-known Trademark” by the relevant PRC authorities
since  we  first  started  using  “科兴”  in  the  trade  name  of  Sinovac  Beijing  in  2001.  If  the  “科兴”  trademark  owned  by  Shenzhen  Kexing  is  ever  officially
identified as a “Well-Known trademark,” however, we may be subject to trademark infringement claim for the use of “科兴” in our trade name. Although the
trademark application and the trade name approval systems are administered separately in China, it is possible that we may lose our ability to use the “科兴”
trademark in our trade name due to a successful trademark infringement claim, which may adversely affect our ability to maintain and protect our brands, cause
us  to  incur  litigation  costs  and  divert  resources  and  management  attention.  As  our  brand  name  is  becoming  more  recognized  in  the  vaccine  market,  we  are
working to maintain, increase and enforce our rights in our trademark portfolio, the protection of which is important to our reputation and branding. 

We have registered our domain names, including www.sinovac.com.cn and www.sinovac.com, with the China Internet Network Information Center. 

Insurance 

We maintain property insurance coverage with an annual aggregate insured amount of approximately RMB539.0 million ($83.2 million) to cover our property
and facilities from claims arising from fire, earthquake, flood and a wide range of other natural disasters. Our worldwide product liability insurance of Healive,
Bilive,  Anflu  and  Panflu  (excluding  U.S.  and  Europe)  from  March  2015  to  March  2016  is  limited.  Moreover,  we  do  not  carry  liability  insurance  to  cover
liability claims that may arise from the incidents relating to the clinical trials of our vaccine products. Our insurance coverage may not be sufficient to cover any
claim for product liability or damage to our fixed assets. We do not maintain any business interruption insurance. We are carrying worldwide product liability
insurance for Healive, Bilive, Anflu and Panflu (excluding U.S. and Europe) from March 2015 to March 2016 with the premium of $53,000. We are currently
negotiating with the insurance providers for a renewal of our product liabilities insurance policies. See “Item 3. Key Information — D. Risk factors — Risks
Related to Our Company — We could be subject to costly and time-consuming product liability actions and carry limited insurance coverage.” 

Regulatory Framework of the Pharmaceutical Industry in the PRC 

The  testing,  approval,  manufacturing,  labeling,  advertising  and  marketing,  post-approval  safety  reporting,  and  export  of  our  vaccine  products  or  product
candidates are extensively regulated by governmental authorities in the PRC and other countries. 

In the PRC, the CFDA regulates and supervises biopharmaceutical products under the Pharmaceutical Administration Law, the Implementing Regulations on
Pharmaceutical  Administration  Law,  the  Administration  of  Registration  of  Pharmaceuticals  Procedures,  and  other  relevant  rules  and  regulations  which  are
applicable  to  manufacturers  in  general.  Every  step  of  our  biopharmaceutical  production  is  subject  to  the  requirements  on  the  manufacture  and  sale  of
pharmaceutical products as provided by these laws and regulations, including but not limited to, the standards of clinical trial, declaration, approval and transfer
of new medicine registrations, applicable industry standards of manufacturing, distribution, packaging, advertising and pricing. 

Pre-clinical Studies. Pre-clinical studies include in-vitro laboratory evaluation of the product candidate, as well as in-vivo animal studies to assess the potential
safety and efficacy of the product candidate. Pre-clinical studies must be conducted in compliance with Good Laboratory Practice for Non-clinical Studies of
Pharmaceuticals. With respect to vaccines, the pre-clinical studies should also comply with Technical Guidance for Pre-clinical Studies on Preventive Vaccines.
We must submit file package for investigational new drug application, or IND, to the provincial level CFDA. The files should include pharmaceutical research,
pharmacology  and  toxicology  research,  together  with  the  records  of  manufacturing  and  testing  and  the  sample  of  product  candidate.  We  cannot  commence
clinical trials until we get approval of IND. We cannot assure that submission of an IND will result in the CFDA allowing clinical trials to begin, or that, once
begin, issues will not arise that result in the suspension or termination of such clinical trials. 

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Clinical  trials.  Clinical  trials  involve  the  administration  of  the  product  candidate  to  healthy  volunteers  or  vaccinees  under  the  supervision  of  principal
investigators, who are generally physicians or an independent third party not employed by us or under our control. Clinical trials typically are conducted in three
sequential phases, but the phases may overlap or be combined. In phase I, the initial introduction of the drug into human subjects, the drug is usually tested for
safety (adverse effects), dosage tolerance, and pharmacologic action. Phase II usually involves studies in a limited vaccinee population to evaluate preliminarily
the  efficacy  of  the  drug  for  specific,  targeted  conditions  and  to  determine  dosage  tolerance,  appropriate  dosage  and  to  identify  possible  adverse  effects  and
safety risks. Phase III trials generally further evaluate clinical efficacy and test further for safety within an expanded vaccinee population. Clinical trials have to
be  conducted  in  compliance  with  the  Good  Clinical  Trial  Practice  of  Pharmaceuticals.  With  respect  to  vaccines,  we  also  have  to  comply  with  the  CFDA’s
Requirements on Application for Clinical Trial of New Preventive Biological Products. The sample vaccine products must be tested by the NIFDC before they
may  be  used  in  the  clinical  trials.  We  or  the  CFDA  may  suspend  clinical  trials  at  any  time  on  various  grounds,  including  a  finding  that  subjects  are  being
exposed to an unacceptable health risk. 

After  three  phases  of  clinical  trials,  we  apply  for  New  Drug  Application,  or  NDA.  We  submit  to  the  provincial  level  CFDA  the  NDA  file  package,  which
includes clinical trial research report, pharmaceutical research data, and records of manufacturing and testing of three batches of product, to apply for a new
drug certificate and/ or production license. For vaccines, we have to comply with the CFDA’s Guidelines for Clinical Trial Report on Vaccines. 

New  Drug  Certificate.  The  provincial  level  CFDA  will  conduct  a  preliminary  examination  of  our  application  for  a  new  drug  certificate.  Once  it  decides  to
accept  our  application  based  upon  such  preliminary  examination,  the  provincial  level  CFDA  will,  within  five  days,  conduct  an  on-site  examination  on  the
circumstances of our clinical trials and pharmaceutical research. Then the provincial level CFDA will submit its opinion, together with our application materials,
to  the  Centers  for  Drug  Evaluation.  The  Centers  for  Drug  Evaluation  will  review  our  application  materials,  and  give  their  technical  opinion  to  CFDA.  The
CFDA will decide whether or not to issue a new drug certificate to us. We consider obtaining the new drug certificate for our product candidates a significant
milestone in our business. 

Production  Permit.  Simultaneously  with  the  application  of  new  drug  certificate,  we  also  apply  to  the  provincial  level  CFDA  for  a  production  license  to
manufacture the new drug to be approved by the CFDA. The production license application will be examined with similar stage procedure as for the new drug
certificate, first by the provincial level CFDA followed by the Centers for Drug Evaluation, and the CFDA the last. After the provincial level CFDA accepts the
application, conducts the on-site examination and forms its opinion, the provincial level CFDA will transfer the file to the Centers for Drug Evaluation, and the
Centers for Drug Evaluation will review the application files and give technical opinion. If the Centers for Drug Evaluation is satisfied with our application
materials, it will notify us to apply for the on-site production inspection within six months after being so notified. The Center for Food and Drug Inspection will
conduct an on-site inspection on our production procedures within 30 days after receipt of our application and take samples from three batches of our products,
and the NIFDC will test the selected samples and later submit its testing reports to the Centers for Drug Evaluation. The Center for Food and Drug Inspection
must submit the on-site production inspection report to Center for Drug Evaluation. The Centers for Drug Evaluation will form a comprehensive opinion based
upon  the technical review  and  evaluation opinion,  the  on-site production  inspection  report and  the testing  results  of the  samples, and submit  its opinion  and
relevant materials to the CFDA. The CFDA will decide whether or not to issue the production permit to us. If the product approval and production approval
both meet the criteria, the CFDA will issue the production permit together with the new drug certificate at the same time. The production permit is valid for a
term  of  five  years  and  must  be  renewed  before  its  expiration.  During  the  renewal  process,  our  production  facilities  will  be  re-evaluated  by  the  appropriate
governmental authorities and must comply with the effective standards and regulations. 

Under  certain  circumstances,  for  instance,  where  drugs  are  developed  to  cure  a  disease  without  effective  therapeutic  methods,  the  CFDA  provides  a  special
proceeding for its review of the new drug certificate application and production permit application relating to such drugs. 

The  CFDA  will  specify  a  monitoring  period  ranging  from  three  to  five  years  when  approving  the  first  production  permit  for  most  new  drugs.  During  this
monitoring period, the manufacturers holding the new drug certificates must regularly report, among other things, the production process, efficacy, stability and
side effects of the new drugs involved to the provincial level CFDA. During the same period, the CFDA will not accept any new application for approval of the
same  drug  involved.  However,  if  a  third  party  has  filed  an  application  for  the  same  drug  and  obtained  the  clinical  trial  permit  before  the  monitoring  period
commences, the third party may still obtain a new drug certificate and production permit for the same drug. 

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We  may  also  be  required  to  conduct  clinical  trials  prior  to  commencing  the  manufacturing  of  pharmaceutical  products  for  which  there  are  published  state
pharmaceutical standards. 

GMP Certificate. After receiving the on-site inspection notification for production permit, we should submit the GMP inspection application to the Center for
Food  and  Drug  Inspection  as  well.  The  Center  for  Food  and  Drug  Inspection  will  arrange  for  the  inspection  on  our  facilities  for  both  purposes  of  GMP
inspection and production permit at the same time. If we pass the GMP inspection, CFDA will issue the GMP Certificate after we get the Production Permit. A
GMP  Certificate  is  used  to  approve  the  quality  system,  including  quality  assurance  and  quality  control  management,  production  management,  material  and
product, qualification and validation, facility and equipment, etc. The CFDA has issued GMP standards for pharmaceutical manufacturers to minimize the risks
arising out of the production process of drugs that will not be identified or eliminated through testing the final products. 

A GMP Certificate is valid for five years and we should apply for a renewal of our GMP Certificate no later than six months prior to the expiration of our GMP
Certificate. 

We cannot commence the manufacture of a new drug unless and until we have obtained a valid new drug certificate, production permit and GMP Certificate. 

Batch Approval. Our vaccine products cannot be distributed in the market before receiving batch approval. After we get the GMP certificate, we will start the
commercial production, after which we need to apply for batch release approval by the NIFDC for the commercial lots. For each batch of products, we will
provide  samples  taken  from  cold  rooms  by  inspectors,  together  with  manufacturing  records,  self-testing  records  and  other  quality  control  documents.  The
NIFDC will review the documents and test the samples and issue a batch approval within approximately two months if our manufacture procedures and the
quality of our products meet CFDA standards. With the batch approval, we may distribute the approved batch of vaccines to the market. 

C. Organizational Structure

The  following  diagram  illustrates  our  company’s  organizational  structure,  and  the  place  of  incorporation,  ownership  interest  and  affiliation  of  each  of  our
subsidiaries as of the date of this report. 

45

  
  
  
  
  
  
  
  
  
 
* Dalian Jin Gang Group Co., Ltd. owns the remaining 45% equity interest in Sinovac Dalian. 
** Sinobioway Bio-medicine Co., Ltd., formerly named Xiamen Bioway Group Co., Ltd, owns the remaining 26.91% equity interest in Sinovac Beijing. 
*** The former name is Beijing Sinovac Biological Technology Co., Ltd. 
**** The former name is Sinovac Zhong Yi Bio-pharmaceutical Co., Ltd. 

D. Property, Plants and Equipment

We are headquartered in the Peking University Biological Industry Park (Haidian) in Beijing in a 48,900-square-foot facility, of which approximately 16,700
square  feet  are  used  as  office  space  and  approximately  32,200  square  feet  are  used  for  the  production  plant  for  Healive  and  Bilive,  where  the  production
equipment for hepatitis vaccines is located. We own the above-described 48,900-square-foot facility in Beijing. In August 2004, we signed two 20-year leases
with  SinoBioway  Biotech  Group  Co.  Ltd.,  or  SinoBioway,  pursuant  to  which  we  leased  two  buildings  of  approximately  28,000  and  13,300  square  feet,
respectively, located at the Peking University Biological Park in Beijing. We house our Anflu manufacturing and R&D center in these two buildings. One of the
lease agreements was amended on August 12, 2010 to reflect an increase in the lease payment. In June 2007, we signed another 20-year lease with SinoBioway,
in order to expand Sinovac Beijing’s production facilities in Beijing, pursuant to which we leased one building of approximately 37,000 square feet, located at
Peking  University  Biological  Park.  Part  of  our  administrative  offices  and  filling  facilities  are  located  in  this  building  until  2013.  The  filling  facilities  were
moved to Changping site in 2013, where we are setting up the commercial production facility for our pneumococcal vaccines. In September 2010, we entered
into  an  agreement  with  SinoBioway,  under  which  we  lease  a  space  of  6,778  square  feet.  The  lease  term  is  five  years  and  we  used  it  for  our  research  and
development function. On April 8, 2013, we entered into three supplemental agreements with SinoBioway, under which the expiration date of each of the four
operating lease agreements was extended to April 7, 2033. 

We have three production lines located in the Peking University Biological Park (Haidian). Our production line to manufacture our hepatitis vaccines, Healive
and Bilive, interchangeably has an aggregate combined production capacity of approximately 10 million doses annually. Our production line to manufacture our
flu  vaccines,  Anflu,  Panflu  and  Panflu.1,  interchangeably  has  an  annual  production  capacity  of  approximately  eight  million  doses  of  Anflu  (northern
hemisphere),  or  the  equivalent  of  20  million  doses  of  Panflu  or  20  million  doses  of  Panflu.1.  We  have  also  built  Pneumococcal  Polysaccharide  Vaccine
production line at Haidian site with designed annual capacity of five million doses per year. In May 2013, our new filling and packaging line in Changping site
was granted the new GMP certificate, after which we moved the filling and packaging activities to our Changping site. 

In February 2010, we acquired a right to use approximately 312,400 square feet of land located in Changping District, Beijing, or Changping Site, with five
buildings  with  a  total  built-out  area  of  32,322  square  meters  (approximately  347,900  square  feet)  on  29,021  square  meters  (for  a  total  consideration  of
approximately RMB123.6 million ($19.1 million). We have made all required payments by December 31, 2012. We have built a new filling and packaging line,
EV71 production facilities and a warehouse on the Changping site. The new filling and packaging line and warehouse commenced operation in May 2013 and
December 2010, respectively. The EV71 vaccine production line has a designed annual capacity of 20 million doses and was granted the new GMP certificate in
January 2016. 

46

  
  
  
  
  
  
  
  
 
 
In November 2009, we entered into an agreement with Dalian Jin Gang Group to establish Sinovac Dalian. In January 2010, we established Sinovac Dalian
which focuses on the research, development, manufacturing and commercialization of live-attenuated vaccines, such as varicella, mumps and rubella vaccines
for human use. Sinovac Dalian has seven existing buildings with a total built-out area of 20,000 square meters (approximately 215,280 square feet) on 95,685
square meters (approximately 1,030,000 square feet) of land, located at DD Port, Economic and Technical Development Zone, Dalian City, Liaoning province.
Sinovac Dalian received its GMP certificate (2010 version) from the CFDA for its mumps vaccine in September 2012. 

ITEM 4A. UNRESOLVED STAFF COMMENTS 

Not applicable. 

ITEM 5. OPERATING AND FINANCIAL REVIEW AND PROSPECTS 

You  should  read  the  following  discussion  and  analysis  of  our  financial  condition  and  results  of  operations  in  conjunction  with  our  consolidated  financial
statements and the related notes included elsewhere in this annual report on Form 20-F. This discussion may contain forward-looking statements based upon
current expectations that involve risks and uncertainties. Our actual results may differ materially from those anticipated in these forward-looking statements as
a result of various factors, including those set forth under “Item 3. Key Information — D. Risk Factors” or in other parts of this annual report on Form 20-F. 

A. Operating Results

Overview 

We  are  a  fully  integrated,  China-based  biopharmaceutical  company  that  focuses  on  the  research,  development,  manufacturing  and  commercialization  of
vaccines against infectious diseases. We have successfully developed a portfolio of products, consisting of vaccines against hepatitis A, hepatitis B, influenza
viruses and mumps. The following table sets forth certain information on our commercialized products. 

Products
Healive
Bilive
Anflu
Panflu(1)
Panflu.(1)
Mumps

  Date of Approval
  May 2002
June 2005
  October 2005
  April 2008
  September 2009
  September 2012

2015

4.1 million
2.3 million
3.2 million
1.1 million
nil
1.2 million

Number of Doses Sold
2014

3.9 million
2.6 million
3.4 million
40,000
nil
1.7 million

2013

4.1 million 
2.5 million
3.4 million
3.0 million
nil
1.2 million

(1) We sold all of our Panflu and Panflu.1 products to the PRC government. Our sales of Panflu and Panflu.1 depend on the completion of government audit on
our fulfillment to the stockpiling order. In 2015, 1.1 million doses of Panflu products manufactured for the government stockpiling order were not used and
expired, allowing us to recognize sales revenue. Sales of Panflu generated revenues of $3.9 million in 2015.

Our pipeline consists of various vaccine candidates in the pre-clinical and clinical trial development phases in China. We completed three phases of clinical
trials on our EV71 vaccine and the phase III clinical results showed our EV71 vaccine candidate has an efficacy rate of 94.8% against HFMD among infants and
young children. We obtained new drug certificate and production license for our EV71 vaccine in December 2015, and obtained the GMP certificate in January
2016. In addition, we filed applications to conduct clinical trials for pneumococcal conjugate vaccine, pneumococcal polysaccharide vaccine and rubella vaccine
in  early  2011.  We  filed  an  application  for  the  clinical  trial  of  varicella  vaccine  in  January  2013.  We  obtained  the  approvals  to  conduct  clinical  trials  of
pneumococcal polysaccharide vaccine, rubella vaccine, pneumococcal conjugate vaccine and sIPV vaccine in May 2014, December 2014, January 2015 and
December 2015, respectively. 

47

  
  
  
  
  
  
  
  
  
  
  
  
  
 
 
 
 
 
 
Our Proprietary Rights 

Healive was co-developed by Tangshan Yian and the NIFDC. In April 2001, Tangshan Yian contributed its proprietary rights to Healive to Sinovac Beijing as
its capital contribution to Sinovac Beijing. In 2002, the NIFDC, Tangshan Yian and Sinovac Beijing agreed that Sinovac Beijing owns the right to market and
sell Healive, and that Sinovac Beijing was required to pay the NIFDC approximately $1 million for the Healive technology consulting fee that Tangshan had not
paid by that time. We obtained Healive’s new drug certificate from the CFDA in December 1999, the production license in May 2002, and final PRC regulatory
approval for production of Healive in May 2002. Production of Healive commenced in July 2002. 

Bilive was initially developed by Tangshan Yian. In March 2002, Tangshan Yian and Beijing Keding entered into an agreement under which Tangshan Yian
transferred to Beijing Keding its proprietary rights to Bilive at no cost. In August 2002, Sinovac Beijing acquired the proprietary rights to Bilive from Beijing
Keding in consideration of a 10.7% equity interest in Sinovac Beijing and a cash payment of $18,000. Beijing Keding is owned by Dr. Weidong Yin and three
other senior officers of Sinovac Beijing. We received the production license for Bilive from the CFDA in January 2005. In June 2005, we obtained the final
PRC regulatory approval for production of Bilive. The cost of the proprietary rights to Bilive was expensed as purchased in-process research and development.
Production of Bilive commenced in June 2005. 

In  March  2003,  Sinovac  Beijing  acquired  the  proprietary  rights  to  Anflu  from  Tangshan  Yian  at  the  vendor’s  cost.  In  November  2004,  we  completed  the
acquisition of 100% of the shares of Tangshan Yian. We received the final PRC regulatory approval for the production of Anflu in October 2005. The cost of
the proprietary rights to Anflu was expensed as purchased in-process research and development. 

Sinovac Beijing started to research and develop the H5N1 vaccine in 2004. In 2004, Sinovac Beijing entered into an agreement with the National Institute for
Biological Standards and Controls, or NIBSC, an England based laboratory under the WHO, on transferring the H5N1 virus strain. According to the agreement,
Sinovac Beijing as the recipient would receive the materials and information from NIBSC. The agreement indicated that Sinovac Beijing can only use received
materials and information for academic in-house research purposes and Sinovac Beijing shall negotiate with the owner of reverse genetics technology pertaining
to virus strain for any commercial purpose. In April 2008, Sinovac Beijing received a production license for H5N1 from the PRC government and started to
produce H5N1 vaccines for the government-stockpiling program in June 2008. 

In  2011,  we  licensed  from  MedImmune  certain  rights  to  use  patented  reverse  genetics  technology  pertaining  to  virus  strain  production  for  H5N1  influenza
vaccine. We have agreed to pay an upfront license fee, milestone payments up to an aggregate of $9.9 million based upon the achievement of cumulative net
sales of licensed products in China (including Hong Kong and Macau), as well as royalty payments in single digit of net sales of the licensed products in China
(including  Hong  Kong  and  Macau).  On  August  15,  2012,  we  entered  into  amended  agreements  with  MedImmune  to,  among  other  things,  extend  the
effectiveness of each agreement to reflect revised termination dates between December 2015 and May 2021. License fee and royalties of $3.4 million accrued at
the end of 2011 was paid in 2012. No payments were made in 2013 and 2015. We made $0.9 million royalty payment to MedImmune in 2014. 

Amortization expense for these proprietary rights was $0.4 million, $0.4 million and $0.4 million in 2015, 2014 and 2013, respectively. 

Research and Development Programs 

The  research  and  development  strategy  is  developed  by  management  and  reviewed  and  approved  by  the  board  of  our  company.  Leveraging  resources  and
platform that each subsidiary has, the R&D team of each subsidiary selects a R&D project and develops a feasibility analysis to be submitted for review and
approval. Once the project is approved, we will track the R&D progress as well as the spending of each project. Each year all the ongoing R&D projects will be
reviewed along with the budgeting for the following year. We also use our research and development resources, including employees and our technology, across
multiple  product  development  programs.  The  table  below  presents  our  best  estimate  of  our  total  research  and  development  costs  allocable  to  our  leading
research and development programs for the periods indicated. We have allocated direct and indirect costs to each program based on certain assumptions and our
review of the status of each program, payroll related expenses and other overhead costs based on estimated usage by each program. 

48

  
  
  
  
  
  
  
  
  
  
  
 
Research and development programs
EV71 vaccine
Pneumococcal polysaccharide vaccine
Varicella vaccine
sIPV
Pneumococcal Conjugate Vaccine
Mumps vaccine
Others
Total

2015

Year ended December 31,
2014
(in thousands)

2013

$

$

325  
2,816  
1,650  
1,617  
1,155  
235  
1,692  
9,490   

$

$

1,521
2,363
1,050
3,170
682
147
2,001
10,934   

$

$

2,571
440
945
187
1,358
227
2,400
8,128 

The process of developing, obtaining and maintaining regulatory approvals for new products is lengthy, expensive and uncertain. While the development may
take years to complete, the market environment may change from the time when the project is selected, which will have an impact to the expected return of the
investment. We anticipate that we will frequently monitor the progress of each key project and determine which of our early stage product candidates is best
suited for further development, as well as how much funding to direct to each program, on an on-going basis in response to the scientific and clinical success
and commercial potential of each product candidate. 

We  have  obtained  the  new  drug  certification,  production  license  and  GMP  certification  for  our  new  core  product,  the  EV71  vaccine.  We  have  started  the
commercial  production  and  expect  to  launch  the  sales  of  EV71  by  the  first  half  of  2016.  We  also  began  phase  III  clinical  trials  for  the  pneumococcal
polysaccharides vaccine in April 2015, and acquired clinical trial licenses for the Sabin-IPV vaccine, varicella vaccine and pneumococcal conjugate vaccine. 

Government Grants 

Deferred government grants represent funding received from the government for research and development, or investment in building or improving production
facilities.  The  amount  of  deferred  government  grants  as  of  year-end  is  net  of  research  and  development  expenditures  or  depreciation  incurred  or  those
recognized as government grant income. We received RMB1.5 million ($0.2 million), RMB21.7 million ($3.5 million) and RMB5.2 million ($0.8 million) in
2015, 2014 and 2013, respectively. In addition, we received RMB1.9 million ($0.3 million) interest subsidy, rental fee subsidy and other government grants
recognized in statements of comprehensive income (loss) in 2015. 

Deferred  government  grants  included  RMB7.3  million  ($1.1  million),  representing  the  unamortized  portion  of  the  amount  that  we  received  in  2007  for
construction of a pandemic influenza vaccine plant and buildings of RMB20.0 million ($3.1 million) (RMB9.1 million ($1.5 million) as of December 31, 2014).
Out of such RMB7.3 million ($1.1 million), RMB1.8 million ($0.3 million), which will be amortized in 2016, was included in the current portion and RMB5.5
million ($0.8 million), which will be amortized after 2016, was included in the non-current portion of the deferred government grants. The production facility
grant requires us to have the entire facility available to manufacture pandemic influenza vaccines at any given moment upon request by the PRC government.
We have fulfilled the conditions attached to the government grant. Government grant relating to these production facilities of $0.3 million, $0.3 million and $0.2
million for the years ended December 31, 2015, 2014 and 2013, respectively, were recorded as a reduction to depreciation expense for those respective years. 

49

  
  
  
  
  
  
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Deferred government grants also included RMB3.0 million ($0.5 million) being the unamortized portion of the amount that we received in 2009 for purchasing
equipment for H1N1 vaccine production with a total amount of RMB6.2 million ($1.0 million). The amount of RMB0.8 million ($0.1 million) which will be
recognized in 2016 was included in the current portion and the amount of RMB2.2 million ($0.3 million) which will be recognized after 2016 was included in
the  non-current  portion  of deferred government grants. We have  fulfilled the  conditions attached to the  government  grant.  Government  grant relating to this
production  facility  of  $0.1  million,  $0.1  million  and  $0.1  million  for  the  years  ended  December  31,  2015,  2014  and  2013,  respectively,  were  recorded  as  a
reduction to the related depreciation expense. 

Deferred  government  grants  also  included RMB0.4  million ($61,000),  which represents  the unamortized  portion  of the  amount that  we received  in  2013  for
purchasing  equipment  for  H5N1  vaccine  production.  We  have  fulfilled  the  conditions  attached  to  the  government  grant.  The  amount  of  RMB0.1  million
($15,000) to be amortized in 2016 was included in the current portion and the amount of RMB0.3 million ($46,000) to be amortized after 2016 was included in
the  non-current  portion  of  deferred  government  grants.  Government  grant  relating  to  this  production  facility  of  $16,000  and  $16,000  for  the  year  ended
December 31, 2015 and 2014 were recorded as a reduction to the related depreciation expense, respectively. 

We received a government grant in the amount of RMB20.0 million ($3.1 million) for equipment purchase and construction of the EV71 vaccine production
facility. As of December 31, 2015, we have not fulfilled the conditions attached to the government grant. We obtained GMP certificate of the EV71 vaccine
issued by the CFDA in January 2016, which was the final major condition attached to the grant. The amount of RMB1.7 million ($0.3 million) to be amortized
in  2016  was  included  in  the  current  portion  and  the  amount  of  RMB18.3  million  ($2.8  million)  to  be  amortized  after  2016  was  included  in  the  non-current
portion of deferred government grants. 

Deferred government grants also include RMB0.5 million ($77,000) that we received in 2015 for EV71 research and development. As we have obtained the
GMP certificate of our EV71 vaccine and expect to fulfill the conditions within one year, the grant is recorded as a current deferred government grant. As of
December 31, 2015, we have obtained the new drug certificate and production license of EV71 vaccine issued by the CFDA, and have fulfilled the conditions
attached to three government grants received in prior years for EV71 research and development with a total amount of RMB10.0 million ($1.6 million). These
grants were recognized as government grant recognized in income for the year ended December 31, 2015. 

We received a loan of RMB12.0 million ($1.9 million) bearing an interest rate of 0.36% per year from Beijing Zhongguancun Development Group. The fair
value  differential  (between  the  face  value  and  the  fair  value  using  the  effective  interest  rate  method  at  our  borrowing  rate  of  6.9%)  is  recorded  as  current
deferred government grant of $0.4 million as of December 31, 2015 ($0.4 million as of December 31, 2014). 

Deferred government grants also include RMB4.9 million ($0.8 million) in relation to four other research projects. As of December 31, 2015, the conditions
attached to three of the four government grants totaling RMB4.4 million ($0.7 million) (RMB4.0 million ($0.6 million) as of December 31, 2014) have not been
fulfilled by us. As we do not expect to fulfill the conditions within one year, these grants are recorded as non-current deferred government grants. We expect to
fulfill the conditions attached to one of the four grants within one year, and therefore recorded RMB0.5 million ($78,000) as of December 31, 2015 (RMB0.5
million ($81,000) as of December 31, 2014) as a current deferred government grant. 

Critical Accounting Policies and Estimates 

Our consolidated financial information has been prepared in accordance with U.S. GAAP, which requires us to make judgments, estimates and assumptions that
affect (1) the reported amounts of our assets and liabilities, (2) the disclosure of our contingent assets and liabilities at the end of each fiscal period and (3) the
reported  amounts  of  revenues  and  expenses  during  each  fiscal  period.  We  continually  evaluate  these  estimates  based  on  our  own  historical  experience,
knowledge  and  assessment  of  current  business  and  other  conditions,  our  expectations  regarding  the  future  based  on  available  information  and  reasonable
assumptions, which together form our basis for making judgments about matters that are not readily apparent from other sources. Since the use of estimates is an
integral  component  of  the  financial  reporting  process,  our  actual  results  could  differ  from  those estimates.  Some  of  our  accounting  policies  require  a  higher
degree of judgment than others in their application. 

When reviewing our financial statements, you should consider (1) our selection of critical accounting policies, (2) the judgment and other uncertainties affecting
the  application  of  those  policies  and  (3)  the  sensitivity  of  reported  results  to  changes  in  conditions  and  assumptions.  We  believe  the  following  accounting
policies involve the most significant judgment and estimates used in the preparation of our financial statements. 

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Revenue Recognition 

Revenue is recognized when persuasive evidence of an arrangement exists, the price is fixed and determinable, delivery has occurred and there is a reasonable
assurance of collection of the sales proceeds. We generally obtain purchase authorizations from our customers for a specified amount of products at a specified
price and consider delivery to have occurred when the customer takes title of the products. We provide certain customers with a right of return. 

Revenue for inactivated hepatitis A, combined inactivated hepatitis A&B and seasonal influenza vaccines are recognized when delivery has occurred and we
estimate return provisions for these products. The product return provisions for inactivated hepatitis A vaccine and combined inactivated hepatitis A&B vaccine
are  estimated  based  on  historical  return  and  exchange  levels  as  well  as  the  inventory  levels  and  the  remaining  shelf  lives  of  the  products  in  the  distribution
channels. As of December 31, 2015, the sales return provision for inactivated hepatitis A vaccine and combined inactivated hepatitis A&B vaccine was $5.9
million  ($3.6  million  as  of  December  31,  2014).  Sales  return  provision  for  the  year  for  private  pay  market  sales  on  inactivated  hepatitis  A  and  combined
inactivated hepatitis A&B represented 13.6% and 8.6% in 2015 and 2014, respectively. We do not accept returns for hepatitis products sold under the Expanded
Program on Immunization and exports, as such no sales returns are estimated for these sales. The product return provision for seasonal influenza vaccines is
estimated based on actual sales returns and expected sales returns up to the end of the flu season because we generally accept returns before the end of the flu
season.  As  of  December  31,  2015,  the  sales  return  provision  for  seasonal  influenza  vaccine  returns  was  approximately  $1.5  million  ($1.3  million  as  of
December 31, 2014). 

Revenue for animal and mumps vaccines without a right of return provided to customers is recognized when delivery has occurred. Revenue for animal and
mumps vaccines with a right of return provided to customers is recognized when payments are collected from customers as we currently do not have sufficient
historical data to estimate returns for these products. 

Deferred  revenue  is  generally  relating  to  government  stockpiling  programs  and  advances  received  from  customers.  For  government  stockpiling  programs  of
H1N1 and  H5N1  vaccines,  we generally  obtain  purchase  authorizations  from the government  for a  specified  amount of  products at a  specified  price and  no
rights of return are provided. Revenue is recognized when the government takes delivery of the products. If the products expire prior to delivery, these expired
products are recognized as revenue once cash is received and the products have expired and passed government inspection. 

Allowance for Doubtful Accounts 

We  extend  unsecured  credit  to  our  customers  in  the  ordinary  course  of  business  but  mitigate  the  associated  risks  by  performing  credit  checks  and  actively
pursuing past due accounts. An allowance for doubtful accounts is established and recorded based on management’s assessment of the credit history with the
customer and current relationships with them. 

We also maintain an allowance for doubtful accounts for estimated losses based on our assessment of the collectability of specific customer accounts and the
aging of the accounts receivable. We analyze accounts receivable and historical bad debts, customer concentrations, customer solvency, current economic and
geographic trends, and changes in customer payment terms and practices when evaluating the adequacy of our current and future allowance. In circumstances
where we are aware of a specific customer’s inability to meet its financial obligations to us, a specific allowance for bad debt is estimated and recorded, which
reduces the recognized receivable to the estimated amount we believe will ultimately be collected. We monitor and analyze the accuracy of the allowance for
doubtful accounts estimate by reviewing past collectability and adjust it for future expectations to determine the adequacy of our current and future allowance.
Our  reserve  levels  have  generally  been  sufficient  to  cover  credit  losses.  As  of  December  31,  2015,  we  provided  100%  (100%  as  of  December  31,  2014)
allowance for accounts receivable aged more than four years, approximately 71.3% (100% as of December 31,2014) allowance for accounts receivable aged
between three year and four years, approximately 38.6% (56.3% as of December 31,2014) allowance for accounts receivable aged between two year and three
years, approximately 13.6% (18.5% as of December 31,2014) allowance for accounts receivable aged between one year and two years, and approximately 1.4%
(1.8% as of December 31,2014) allowance for accounts receivable aged less than one year. For the year ended December 31, 2015, we changed our estimates of
the allowance for doubtful accounts due to an improved historical trend of collecting accounts aged three years or more. The change in estimate resulted in an
increase to income from continuing operations and net income attributable to shareholders of Sinovac by $0.4 million and $0.3 million, respectively. In addition,
basic and diluted earnings per share increased by $0.00 and $0.00, respectively. 

51

  
  
  
  
  
  
  
  
  
  
 
Our allowance for doubtful accounts as of December 31, 2015 was $2.4 million, compared to $2.6 million as of December 31, 2014. If the financial condition of
our customers were to deteriorate, resulting in an impairment of their ability to make payments, additional allowances may be required. Bad debt recovery was
$49,000 for the year ended December 31, 2015 as compared with $0.3 million expense for the year ended December 31, 2014. 

Inventory Provision 

We  write  off  all  the  unsold  seasonal  influenza  vaccines  before  the  end  of  the  flu  season  at  the  end  of  the  fiscal  year.  In  addition,  we  estimate  an  inventory
provision for existing Healive, Bilive, and Mumps products in inventories after considering the sales forecasts, the conditions of the raw material inventory, as
well as the expiration dates of these products. The inventory provision in 2015, 2014 and 2013 was $1.8 million, $1.0 million and $1.0 million, respectively. 

Impairment of Long-Lived Assets 

Long-lived assets, including intangible assets subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that
the carrying value of an asset group may not be recoverable from the future undiscounted net cash flows expected to be generated by the asset group. An asset
group is identified as assets at the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets. If the asset group is
not  fully  recoverable,  an  impairment  loss  would  be  recognized  for  the  difference  between  the  carrying  value  of  the  asset  group  and  its  estimated  fair  value,
based  on  the  discounted  net  future  cash  flows  or  other  appropriate  methods,  such  as  comparable  market  values.  We  use  estimates  and  judgments  in  its
impairment tests and the timing and amount of impairment charges could be materially different if different estimates or judgments are utilized. We recorded
impairment charges on long-lived assets of nil in 2015 and 2014, as compared with $57,000 in 2013. 

Amortization of Intangible Assets 

We  have  amortized  the  value  of  intangible  assets,  being  licenses,  over  an  estimated  useful  life  of  3  to  10  years.  The  estimated  life  of  intangible  assets  is
inevitably subjective, however, whenever events or changes in circumstance indicates the carrying value may not be recoverable or, at least once per year, we
evaluate impairment and reevaluate the market opportunities for the intangible assets’ products and determine whether the remaining useful life estimate is still
reasonable. In 2015, 2014 and 2013, there was no impairment of intangible assets. 

The following table shows the effect of a change in the estimated useful life of licenses and permits of 10% for 2015: 

(in thousands, except for per share data)
Useful life
Amortization expense
(Loss) for the year
(Loss) per share

Changes from 
reported Amount Based on
Hypothetical 10% Decrease
in Useful Life
9/2.7 years

As Reported
10/3 years

Changes from 
reported amount based on
Hypothetical 10% 
Increase in Useful Life  

11/3.3 years

$
$
$

391
(1,131)
(0.02)

$
$
$

352    $
(1,074)  $
(0.02)  $

320
(1,042)
(0.02)

Given the nature of estimating the useful life of long-lived assets, it is not yet possible to provide a meaningful assessment of historical accuracy of the useful
life estimates employed. It is very likely that the useful life of the licenses and permits will be different from the estimate employed, and the changes could be
material. Changes in the estimated life of the licenses will not have a bearing on the total amount charged to operations over the life of the assets, but could
change the results of operations and financial position in any given period. 

52

  
  
  
  
  
  
  
  
  
  
  
  
 
 
   
   
 
Income Tax Valuation Allowance 

In 2015, we recorded $2.6 million of current deferred income tax assets and $0.6 million in non-current deferred income tax assets based on the difference in
timing of certain deductions for income tax and accounting purposes. We evaluate our valuation allowance requirements at each reporting period by reviewing
all  available  evidence,  both  positive  and  negative,  and  considering  whether,  based  on  the  weight  of  that  evidence,  a  valuation  allowance  is  needed.  When  a
change  in  circumstances  causes  a  change  in  management’s  judgment  about  the  reliability  of  deferred  tax  assets,  the  impact  of  the  change  on  the  valuation
allowance is generally reflected in income from operations. The future realization of the tax benefit of an existing deductible temporary difference ultimately
depends on the existence of sufficient taxable income of the appropriate character within the carry forward period available under applicable tax law. 

Recently Issued Accounting Standards 

In May 2014, the Financial Accounting Standard Board (“FASB”) issued Accounting Standard Update (“ASU”) No. 2014-09, Revenue from Contracts with
Customers (Topic 606). Where a single, global revenue recognition model applies to most contracts with customers. Revenue will be recognized in a manner
that depicts the transfer of goods or services to customers in an amount that reflects the consideration to which an entity expects to be entitled, subject to certain
limitations.  In  August  2015,  the  FASB  issued  ASU  2015-14,  where  the  effective  date  of  ASU  2014-09  was  extended  to  annual  periods  beginning  after
December 15, 2018. We are currently evaluating the impact on our consolidated financial statements of adopting this standard. 

In August 2014, the FASB issued ASU No. 2014-15, Going Concern. Our management will be required to evaluate whether there is substantial doubt about our
ability to continue as a going concern and, if so, disclose that fact. Our management will also be required to evaluate and disclose whether our plans alleviate
that  doubt.  The  guidance  is  effective  for  annual  periods  beginning  after  December  15,  2016.  Early  adoption  is  permitted.  We  will  adopt  ASU  2014-15  on
January 1, 2017, and we do not expect the adoption of this standard will have a material impact on our consolidated financial statements. 

In April 2015, the FASB issued ASU No. 2015-03, Interest—Imputation of Interest (Subtopic 835-30) (“ASU 2015-03”). The guidance would require that debt
issuance  costs  related  to  a  recognized  debt  liability  to  be  presented  in  the  balance  sheet  as  a  direct  deduction  from  the  carrying  amount  of  debt  liability,
consistent with debt discounts or premiums, rather than an asset. ASU 2015-03 is effective for annual reporting periods beginning after December 15, 2015,
including interim periods within that reporting period. Early adoption is permitted. We are currently evaluating the impact, if any, of the adoption of ASU 2015-
03 on our consolidated financial statements. 

In November 2015, the FASB issued ASU No. 2015-17 (“ASU 2015-17”), Income Taxes. To simplify the presentation of deferred income taxes, ASU 2015-17
requires that deferred tax liabilities and assets be classified as non-current in a classified statement of financial position, applicable to all entities that present a
classified statement of financial position. The guidance is effective for annual periods beginning after December 15, 2016. Early adoption is permitted. While
we are still evaluating the impact on our consolidated financial statements of adopting this standard, we do not believe that the adoption of this guidance will
have a material impact on our consolidated financial statements. 

53

  
  
  
  
  
  
  
  
  
 
In January 2016, the FASB issued ASU No. 2016-01 (“ASU 2016-01”), Financial Instruments. ASU 2016-01 requires separate presentation of financial assets
and financial liabilities by measurement category and form of financial asset on the balance sheet or in the accompanying notes to the financial statements. That
presentation provides financial statement users with more decision-useful information about an entity’s involvement in financial instruments. The guidance is
effective  for  annual  periods  beginning  after  December  15,  2017.  Early  adoption  is  permitted.  We  are  currently  evaluating  the  impact  on  our  consolidated
financial statements of adopting this standard. 

In  February  2016,  the  FASB  issued  ASU  No.  2016-02  (“ASU  2016-02”),  Leases.  ASU  2016-02  requires  recognition  of  lease  assets  and  lease  liabilities  by
lessees  for  those  leases  classified  as  operating  leases.  The  guidance  is  effective  for  annual  periods  beginning  after  December  15,  2018.  Early  adoption  is
permitted. We are currently evaluating the impact on our consolidated financial statements of adopting this standard. 

In March 2016, the FASB issued ASU No. 2016-09 (“ASU 2016-09”), Compensation – Stock Compensation. Under ASU 2016-09, we can make an entity-wide
accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur. The guidance is effective
for  annual  periods  beginning  after  December  15,  2016.  Early  adoption  is  permitted.  We  are  currently  evaluating  the  impact  on  our  consolidated  financial
statements of adopting this standard. 

RESULTS OF OPERATIONS 

Consolidated statements of comprehensive income (loss) data

Sales
Cost of sales(1)
Gross profit
Operating expenses:
Selling, general and administrative expenses(1)
Provision (recovery) for doubtful accounts
Research and development expenses(1)
Loss on disposal and impairment of property, plant and equipment
Government grants recognized in income
Total operating expenses
Operating income
Interest and financing expenses
Interest income
Other income
Income from continuing operations before income taxes
Income tax benefit (expenses)
Income from continuing operations
Loss from discontinued operations, net of tax nil
Net income (loss)
Less: (income) attributable to non-controlling interests
Net income (loss) attributable to shareholders of Sinovac
Comprehensive income (loss)
Less: comprehensive (income) attributable to non-controlling interests
Comprehensive income (loss) attributable to shareholders of Sinovac

Year ended December 31,

2015

2013
(in thousands except share and per share data)

2014

$

$

$

67,414   
18,425   
48,989   

37,436   
(49)  
9,490   
26   
(1,637)  
45,266   
3,723   
(1,920)  
1,155   
73   
3,031   
(2,516)  
515   
(728)  
(213)  
(861)  
(1,074)  
(4,688)  
(298)  
(4,986)  

$

62,932
15,476
47,456

34,166
329
10,934
74
(104)
45,399
2,057
(3,407)
2,684
1,312
2,646
(1,458)
1,188
(1,524)
(336)
(515)
(851)
(2,763)
(207)
(2,970)

$

$

71,774
20,505
51,269

33,611
(504)
8,128
88
-
41,323
9,946
(3,031)
2,167
329
9,411
2,225
11,636
(1,266)
10,370
(2,928)
7,442
13,056
(3,244)
9,812

(1) Includes stock-based compensation of $1.0 million, $0.3 million and $0.3 million in 2015, 2014 and 2013, respectively.

54

  
  
  
  
  
  
  
  
   
 
 
 
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Sales 

Revenues from sales represent: (1) the invoiced value of goods, net of value added taxes, and sales returns. See “Item 5. Operating and Financial Review and
Prospects — A. Operating Results — Taxes and incentives.” We recognize revenues at the time when our products are delivered, persuasive evidence of an
arrangement exists, the price is fixed and determinable and there is reasonable assurance of collection of the sales proceeds; and (2) the value of goods produced
for government stockpiling program. We recognize revenues from the sales of products to the government stockpiling program when cash has been received and
the products have expired and passed government inspection or are delivered per government instruction. 

Our  revenues,  growth  and  results  of  operations  depend  on  several  factors,  including  the  level  of  acceptance  of  our  products  among  doctors,  hospitals  and
vaccinees,  and  our  ability  to  maintain  or  increase  prices  for  our  products  at  levels  that  provide  favorable  margins.  The  level  of  acceptance  among  doctors,
hospitals and vaccines is influenced by the performance, promotion and academic research, and pricing of our products. 

We market and sell our vaccine products primarily through various provincial and municipal CDCs. We enter into sales agreements with CDCs each time a
CDC places a purchase order. Pursuant to these sales agreements, CDCs typically agree not to re-sell our products to regions outside the territory the pertinent
CDC covers administratively. Since hepatitis A vaccines were included into government sponsored expended immunization program in 2007, we have actively
participated in the tender and bidding organized by various provincial CDCs. We enter into sales agreements with the CDCs when we win a bid. 

Pricing 

In the private market, we set our price based on our production cost, the price of competitive products and acceptance level of CDC and vaccinees. We also
adjust our product price according to changes in the external environment to balance sales volume and gross profit, and ultimately to maximize the sales profit
margins. 

In the public market, the government purchases vaccines for EPI market by issuing government tenders. During the evaluation process, price is a key factor
which  impacts  the  result  of  the  tender.  Therefore,  we  need  to  price  our  products  competitively  to  win  the  tender.  We  believe  that  our  emphasis  on  product
quality is an advantage and increases our competitiveness. 

Cost of sales 

Our  cost  of  sales  primarily  consists  of  material,  direct  labor  and  production  overheads.  Depreciation  of  property,  plant  and  equipment  attributable  to
manufacturing activities and license amortization are capitalized as part of inventory, and expensed as cost of sales when product is sold. Cost of goods sold in
2015, 2014 and 2013 amounted to $18.4 million, $15.5 million and $20.5 million, respectively, of which idle capacity amounted to $2.2 million, $1.8 million
and $1.8 million, respectively. We produce our products and conduct the final product packaging in-house. 

Our production capacity has not been fully utilized. If we successfully commercialized new products and increase sales of existing products, we expect the unit
production cost to decrease. 

Selling, general and administrative expense 

Selling and marketing expenses consist primarily of salaries and related expenses for personnel engaged in sales, marketing and customer support functions and
costs  associated  with  marketing  activities  and  shipping.  The  selling  expense  in  2015  was  $19.5  million,  representing  29.0%  of  total  sales  revenue  of  2015,
which is a 9.5% increase compared to 2014. Going forward, we expect to maintain the selling expense as a percentage of our revenue generated by our existing
products, but we expect to increase spending on newly commercialized product(s). 

General and administrative expense consists primarily of compensation for employees in executive and operational functions, including finance and accounting,
business development, and human resources. Other significant costs include facilities costs, stock-based compensation and professional fees for accounting and
legal services. 

55

  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
Research and development expenses 

Our research and development expenses consist primarily of: 













salaries and related expenses for personnel;

fees paid to consultants and clinical research organizations in conjunction with their independent monitoring of our clinical trials and acquiring and
evaluating data in conjunction with our clinical trials;

consulting fees paid to third parties in connection with other aspects of our product development efforts;

costs of materials used in research and development;

depreciation of facilities and equipment used to develop our products; and

technology license fees and milestone payments paid to third parties before a product receives regulatory approval.

We expense both internal and external research and development costs as incurred, other than those capital expenditures that have alternative future uses, such
as the build-out of our plant, or license fees and milestone payments made to third parties after regulatory approval is received. We expect our research and
development costs will continue to be substantial and that they will increase as we advance our current portfolio of product candidates through clinical trials and
move other product candidates into pre-clinical and clinical trials. 

Taxes and incentives 

Sinovac Beijing, Tangshan Yian, Sinovac R&D, Sinovac Dalian and Sinovac Biomed are subject to income taxes in China on their taxable income calculated at
a  tax  rate  in  accordance  with  the  relevant  income  tax  laws  and  regulations.  Income  tax  returns  filed  by  us  and  our  active  subsidiaries  that  are  subject  to
examination are Sinovac Beijing and Tangshan Yian for the years since 2005, Sinovac R&D and Sinovac Dalian for the years since 2010, and Sinovac Biomed
for 2015. 

Effective from January 1, 2008, the PRC’s statutory enterprise income tax rate is 25%. Our PRC subsidiaries are subject to income tax at the statutory rate of
25% except for Sinovac Beijing. Sinovac Beijing, being reconfirmed as a High and New Technology Enterprise or HNTE in 2014 for a period of three years, is
subject to a preferential income tax rate of 15% from 2014 to 2016. 

We determine deferred taxes for each tax-paying entity in each tax jurisdiction. The potential tax benefits arising from the losses incurred by the subsidiaries
have been recorded in the financial statements. 

We evaluate our valuation allowances requirements at each reporting period by reviewing all available evidence, both positive and negative, and considering
whether, based on the weight of that evidence, a valuation allowance is needed. When a change in circumstances causes a change in management’s judgment
about the realizability of deferred tax assets, the impact of the change on the valuation allowance is generally reflected in income from operations. The future
realization of the tax benefit of an existing deductible temporary difference ultimately depends on the existence of sufficient taxable income of the appropriate
character within the carry forward period available under applicable tax law. 

The valuation allowances relating to the deductible temporary differences and the unused tax losses of Tangshan Yian, Sinovac R&D and Sinovac Dalian are
still  required  as  realization  of  these  elements  of  the  potential  tax  benefits  is  still  uncertain.  Taking  the  valuation  allowances  into  account,  the  potential  tax
benefits arising from the deductible temporary differences and the unused tax losses of Tangshan Yian, Sinovac R&D and Sinovac Dalian effectively have not
been recorded in the financial statements. The tax losses of the PRC subsidiaries in the amount of RMB 265.0 million ($43.7 million) can be carried forward for
five consecutive years against profits starting from 2016 and will expire ranging from 2017 to 2020, if unused. 

Year Ended December 31, 2015 Compared to Year Ended December 31, 2014 

Sales. Total sales from continuing operations in 2015 increased by 7.1% to $67.4 million from $62.9 million in 2014. Excluding revenue recognition of Panflu
under the government stockpiling program in 2015 and 2014, regular sales of Healive, Bilive, Anflu and mumps vaccine increased by 1.3% to $63.6 million in
2015 from $62.7 million in 2014. The growth is mainly contributed by the sales of Bilive and Anflu in the private-pay market. 

56

  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
The table below sets forth a breakdown of our sales by product: 

Sales

Hepatitis A vaccine
Hepatitis A&B vaccine
Influenza vaccines
Mumps vaccines
Regular sales subtotal
H5N1 vaccine
Total sales

Year ended December 31
2014
2015

(in thousands)

26,801    $
22,615   
12,674   
1,472   
63,562   
3,852   
67,414    $

26,515
21,935
12,131
2,150 
62,731
201
62,932

$

$

Gross  Profit.  Gross  profit  from  continuing  operations  in  2015  increased  by  3.2%  to  $49.0  million  from  $47.5  million  in  2014.  Gross  margin  percentage
decreased  to  72.7%  in  2015  from  75.4%  in  2014.  Excluding  the  impact  of  Panflu  sales  under  the  government-stockpiling  program  in  2015  and  2014,  gross
margin decreased to 73.4% in 2015 from 75.7% in 2014. The decrease of gross margin was mainly due to a lower utilization rate of our hepatitis and influenza
vaccine production facilities and higher inventory provision of influenza and mumps vaccines in 2015. 

Selling, General and Administrative Expenses.. 

Selling, general and administrative expenses for 2015 were $37.4 million, which was maintained at a similar level compared to $34.2 million for 2014. 

We  recorded  total  stock-based  compensation  of  $0.6  million  in  2015  compared  to  $0.3  million  in  2014.  As  of  December  31,  2015,  we  had  unrecognized
compensation costs of $2.6 million. This unearned component will be recognized over a period of 52 months. 

Research  and  Development  Expenses.  Research  and  development  expenses  in  2015,  primarily  represented  expenditures  on  the  advancement  of  pipeline
vaccines, including pneumococcal vaccines, sIPV and varicella vaccine, decreased to $9.5 million in 2015 from $10.9 million in 2014. 

Interest  and  Financing  Expenses.  Interest  and  financing  expense  decreased  by  43.6%  to  $1.9  million  in  2015  from  $3.4  million  in  2014.  The  decrease  in
interest  and  financing  expense  is  primarily  due  to  repayment  of  outstanding  loans  during  2015  compared  to  2014.  There  were  $0.1  million  and  $81,000  of
interest subsidies received in 2015 and 2014, respectively. 

Income Taxes Expenses. Income tax expense was $2.5 million in 2015, compared to an income tax expense of $1.5 million in 2014. Prior to 2014, Sinovac
Beijing  was  in  a  cumulative  tax  loss  position  hence  did  not  have  current  income  tax  payable.  Sinovac  Beijing  returned  to  a  taxable  income  position,  hence
recorded current income tax expense of $3.0 million and $1.6 million in 2015 and in 2014, respectively. 

Income from Continuing Operations. Income from continuing operations was $0.5 million, compared to an income of $1.2 million in 2014. 

Loss from Discontinued Operations. Loss from discontinued operations was $0.7 million, compared to a loss of $1.5 million in 2014. 

Net Loss. Net loss attributable to shareholders of Sinovac was $1.1 million in 2015, compared to a net loss of $0.9 million in 2014. 

57

  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
   
 
 
 
 
 
 
 
 
Year Ended December 31, 2014 Compared to Year Ended December 31, 2013 

Sales. Total sales from continuing operations in 2014 decreased by 12.3% to $62.9 million from $71.8 million in 2013. Excluding revenue recognition of Panflu
under the government stockpiling program in 2014 and 2013, regular sales of Healive, Bilive, Anflu and mumps vaccine increased by 2.8% to $62.7 million in
2014 from $61.0 million in 2013. The growth is mainly contributed by the sales of Bilive in the private-pay market, as well as Healive and Anflu sales in the
public-pay market. 

The table below sets forth a breakdown of our sales by product: 

Sales

Hepatitis A vaccine
Hepatitis A&B vaccine
Influenza vaccines
Mumps vaccines
Regular sales subtotal
H5N1 vaccine
Total sales

Year ended December 31

2014

2013

(in thousands)

26,515    $
21,935   
12,131   
2,150   
62,731   
201   
62,932    $

26,420
20,782
12,156
1,680
61,038
10,736 
71,774

$

$

Gross Profit. Gross profit from continuing operations in 2014 decreased by 7.4% to $47.5 million from $51.3 million in 2013. Gross margin increased to 75.4%
in  2014  from  71.4%  in  2013.  Excluding  the impact  of  Panflu  sales  under  the  government-stockpiling  program  in  2014  and  2013,  gross  margin  increased  to
75.7% in 2014 from 73.5% in 2013. Higher gross margin was mainly driven by increased efficiency in the manufacturing processes which resulted in lower unit
costs, as well as increased selling price of some of our products. 

Selling, General and Administrative Expenses.. 

Selling, general and administrative expenses for 2014 were $34.2 million, which was maintained at a similar level of $33.6 million for 2013. 

We  recorded  stock-based  compensation  of  $0.3  million  in  2014  compared  to  $0.3  million  in  2013.  As  of  December  31,  2014,  we  had  unrecognized
compensation costs of $0.1 million. This unearned component was recognized over a period of 3 months in 2015. 

Research  and  Development  Expenses.  Research  and  development  expenses  in  2014,  which  primarily  represented  amounts  spent  on  the  advancement  of  the
pipeline  vaccines,  including  EV71  vaccine,  pneumococcal  vaccines,  sIPV  and  varicella  vaccine,  increased  to  $10.9  million  from  $8.1  million  in  2013.  This
increase was attributable to the continued advancement of PPV and sIPV. 

Interest and Financing Expenses. Interest and financing expense increased by 12.4% to $3.4 million in 2014 from $3.0 million in 2013. The increase in interest
and financing expense is primarily due to higher outstanding loan balances held during 2014 compared to 2013. There were $81,000 and $65,000 of interest
subsidies received in 2014 and 2013, respectively. 

Income Taxes Expenses. Income tax expense was $1.5 million in 2014, compared to an income tax recovery of $2.2 million in 2013. Prior to 2014, Sinovac
Beijing was in a cumulative tax loss position hence did not have current income tax payable. In 2014, Sinovac Beijing returned to a taxable income position,
hence recorded current income tax expense of $1.6 million. 

Income from Continuing Operations. Income from continuing operations was $1.2 million in 2014, compared to an income of $11.6 million in 2013. 

Loss from Discontinued Operations. Loss from discontinued operations was $1.5 million in 2014, compared to a loss of $1.3 million in 2013. 

58

  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
   
 
 
 
 
 
 
 
 
Net Income (loss). Net loss attributable to shareholders of Sinovac was $0.9 million in 2014, compared to a net income of $7.4 million in 2013. 

B. Liquidity and Capital Resources

We finance our operations primarily through short-term and long-term borrowings, proceeds from our public offering, capital raised in our private placement,
cash  generated  from  operations  and,  to  a  lesser  extent,  cash  from  government  research  grants.  We  believe  that  our  current  cash  and  cash  equivalents,  and
anticipated cash flow will be sufficient to meet our anticipated cash needs, including our cash needs for working capital and capital expenditure, for the next 12
months. We may, however, require additional cash due to changing business conditions or other future developments, including any investments or acquisitions
we may decide to pursue. If our existing cash is insufficient to meet our requirements, we may seek to sell additional equity securities, debt securities or borrow
from banks. 

Cash Flows and Working Capital 

The following table sets forth a summary of our net cash flows for the periods indicated: 

Net cash provided by (used in) operating activities
Net cash used in investing activities
Net cash provided by (used in) financing activities
Effect of exchange rate changes on cash and cash equivalents, including cash classified within 

current assets held for sale

Increase (decrease) in cash and cash equivalents, including cash classified within current assets 

held for sale

Less: Net increase (decrease) in cash classified within current assets held for sale
Increase (decrease) in cash and cash equivalents
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period

$

$

Operating Activities 

2015

2,661   
(4,515)  
(24,196)  

Year ended December 31,
2014
(in thousands)
$

$

(8,647)
(11,003)
5,309

(1,491)  

(1,383)

(27,541)  
(82)  
(27,459)  
91,293   
63,834   

$

(15,724)
(500)
(15,224)
106,517
91,293

$

2013

5,576
(5,176)
14,419

1,182

16,001
703
15,298
91,219
106,517

Net cash provided by operating activities was $2.7 million in 2015, compared to cash used in operating activities of $8.6 million in 2014. Net cash provided by
our operating activities in 2015 resulted primarily from (1) our net income from continuing operations of $0.5 million, (2) inventory provision of $1.8 million,
(3) depreciation of property, plant and equipment and amortization of licenses of $6.5 million, (4) government grants recognized in income of $1.6 million, and
(5) a decrease of deferred revenue of $3.6 million and an increase of restricted cash of $1.7 million which was pledged as collateral for an EPI sales contract. 

Net cash used in operating activities was $8.6 million in 2014, compared to cash provided by operating activities of $5.6 million in 2013. Net cash used in our
operating activities in 2014 resulted primarily from (1) our net income of $1.2 million, (2) inventory provision of $1.0 million and increase of inventories of
$6.1  million,  (3)  depreciation  of  property,  plant  and  equipment  and  amortization  of  licenses  of  $8.1  million,  (4)  an  increase  in  accounts  receivable  of  $9.7
million and a decrease in accounts payables and accrued liabilities of $4.0 million. 

59

  
  
  
  
  
  
  
  
  
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
Investing Activities 

Net cash used in investing activities was $4.5 million in 2015, compared to $11.0 million in 2014. We used less cash to acquire property, plant and equipment in
2015. 

Net cash used  in  investing  activities  was $11.0 million in  2014,  compared  to $5.2  million  in  2013. Our  2014  property,  plant and equipment purchases were
higher as we acquired equipment for the pneumococcal polysaccharide and varicella vaccine production facilities. 

Financing Activities 

Net cash used in financing activities was $24.2 million in 2015 compared to net cash provided by financing activities of $5.3 million in 2014. In 2015, net cash
provided by our financing activities included net proceeds of $0.7 million from issuance of common shares and government funding of $0.5 million. We also
received loan proceeds of $21.3 million and made loan repayments of $46.8 million in 2015. 

Net cash provided by financing activities was $5.3 million in 2014 compared to $14.4 million in 2013. In 2014, net cash provided by our financing activities
included net proceeds of $0.5 million from issuance of common shares and government grants of $3.5 million. We also received loan proceeds of $17.8 million
and made loan repayments of $16.0 million in 2014. 

Accounts Receivable 

Our  total  accounts  receivable,  including  other  receivables  decreased  by  $1.7  million  from  $40.7  million  as  of  December  31,  2014  to  $39.0  million  as  of
December 31, 2015. Our average accounts receivable turnover time in 2015 was 239 days, as compared to 222 days in 2014. 

Our maximum exposure to credit risk at the balance sheet dates relating to accounts receivables is summarized as follows: 

Aging within one year, net of allowance for doubtful accounts
Aging greater than one year, net of allowance for doubtful accounts
Total trade receivable — net

Borrowings 

Year ended December 31,

2015

2014

(in thousands)

34,495
3,823
38,318   

$

$

35,130
4,722
39,852 

$

$

As of December 31, 2015, we had $21.8 million in short-term bank loans and current-portion of long-term bank loans, offset by $63.8 million in cash and cash
equivalents, resulting in a liquid assets balance of $42.0 million, compared with $43.9 million at the end of December 31, 2014. The following tables summarize
our short-term and long-term bank borrowings as of December 31, 2015: 

Type
Loan from Beijing Zhongguancun 
Development Group

  Amount
  RMB12.0 million 
($1.9 million)

Yearly Interest 
Rate
0.36%

Interest 
Payment
Upon Maturity

Maturity 
Date

  February 24, 

2016

Purpose
EV71 vaccine 
research

The total loan is RMB12.0 million ($1.9 million) of which RMB6.0 million ($1.0 million) was received in 2012 and the second RMB6.0 million ($1.0 million)
was received on February 25, 2013. The loan is unsecured and repayable on February 24, 2016. The fair value differential of $0.4 million (between the face
value  and  the  fair  value  using  the  effective  interest  rate  method  at  our  borrowing  rate  of  6.9%)  is  recorded  as  a  current  deferred  government  grant  as  of
December 31, 2015 ($0.4 million in 2014). The loan was repaid on February 22, 2016. 

60

  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
 
 
 
 
 
Type
Bank loan from Bank of China

  Amount
  RMB5.0 million ($0.8 

Bank loan from Bank of China

  RMB5.0 million ($0.8 

million)

million)

Yearly Interest 
Rate
6.955% floating(1)

Interest 
Payment
monthly

Maturity 
Date

  March 16, 2016

Purpose
operation

6.01% floating(2)

  monthly

  October 26, 2016  

operation

(1) Annual interest rate at 30% above the People’s Bank of China’s prime rate for loans of one year. 
(2) Annual interest rate at 166 base points above the People’s Bank of China’s prime rate for loans of one year. 

On March 17, 2015, Sinovac Dalian entered into a bank loan with Bank of China in the aggregate principal amount of RMB5.0 million ($0.8 million) to finance
its  working  capital  requirements.  The  loan  bears  interest  at  30%  above  the  prime  rate  of  a  one-year  term  loan  published  by  the  People’s  Bank  of  China,  at
6.955%, the interest is paid monthly. The loan was repaid on March 16, 2016. On October 26, 2015, Sinovac Dalian entered into a bank loan with Bank of
China in the aggregate principal amount of RMB5.0 million ($0.8 million) to finance its working capital requirements. The loan bears interest at 166 base points
above the prime rate of a one-year term loan published by the People’s Bank of China, at 6.01%, the interest is paid monthly, and the loan will be repaid on
October 26, 2016. Prepaid land lease payments and buildings of Sinovac Dalian with a net book value of RMB57.6 million ($8.9 million) as of December 31,
2015 are pledged as collateral. 

Type
Bank loan from Bank of Beijing

  Amount
  RMB4.9 million 
($0.8 million)

Yearly Interest
Rate
5.25% 

Interest
Payment
quarterly

Maturity 
Date
January 30, 2019  

Purpose
construction of 
the 
Pneumococcal 
Polysaccharide 
Vaccine facilities

Sinovac Beijing entered into a new bank loan with Bank of Beijing in the aggregate principal amount of RMB48.0 million ($7.4 million) for a period from July
2015 to July 2020 for construction of the Pneumococcal polysaccharide vaccine facilities. The loan bears interest at the bank’s prime lending rate, at 5.25% per
year. Interest is payable quarterly. The loan will be due in four installments in January 2019, July 2019, January 2020 and July 2020. RMB 4.9 million ($0.8
million) was drawn in July 2015. Prepaid land lease payments and buildings of Sinovac Beijing with a net book value of RMB18.8 million ($2.9 million) as of
December 31, 2015 are pledged as collateral. 

Type
Bank loan from China Construction 
Bank

  Amount
  RMB50.0 million 
($7.7 million)

Yearly Interest 
Rate
5.36% 

Interest 
Payment
monthly

Maturity 
Date
June 3, 2016

Purpose
operation 

On June 4, 2015, Sinovac Beijing entered into a bank loan with China Construction Bank in the aggregate principal amount of RMB50.0 million ($7.7 million)
to finance its working capital requirements, bearing interest at 5% above the prime rate of a one-year term loan published by the People’s Bank of China and the
interest rate of current year is 5.36%. Interest is payable monthly. The loan was drawn by three installments on June 4, 2015, June 29, 2015, and August 7, 2015,
and will be due on June 3, 2016. Pursuant to the covenants set out in the agreement, the debt to total assets ratio must not be higher than 80%, the current ratio
must not be lower than 0.8, contingent liabilities must not be higher than RMB161.0 million ($24.8 million) and contingent liabilities as a percentage of total
shareholders’  equity  must  not  be  higher  than  50%.  We  are  in  compliance  with  such  covenants  as  of  December  31,  2015.  Prepaid  land  lease  payment  and
building of the Changping facilities of Sinovac Beijing with a net book value of RMB105.1 million ($16.2 million) as of December 31, 2015 are pledged as
collateral. 

61

  
  
  
  
  
  
  
  
  
 
 
 
 
 
 
 
 
 
 
Type
Bank loan from China Merchants 
Bank

  Amount
  RMB20.0 million 
($3.1 million)

Yearly Interest 
Rate
4.57% 

Interest 
Payment
quarterly

Maturity 
Date

  November 4, 

2016

Purpose
Operation

Sinovac  Beijing  entered  into  a  bank  loan  with  China  Merchants  Bank  in  the  aggregate  principal  amount  of  RMB20.0  million  ($3.1  million)  to  finance  its
working capital requirements, bearing interest at 5% above the prime rate of a one-year term loan published by the People’s Bank of China, at 4.57% per year.
Interest is payable quarterly. The loan was drawn on November 5, 2015, and will be due on November 4, 2016. The loan is guaranteed by an unrelated third
party, with a guarantee fee of RMB0.4 million ($62,000) over the term of the loan. Trade receivables of Sinovac Beijing with a carrying value of not lower than
RMB35.0 million ($5.4 million) as of December 31, 2015 are pledged as collateral. 

Type
Bank loan from China Merchants 
Bank

  Amount
  RMB30.0 million 
($4.6 million)

Yearly Interest 
Rate
5.58% 

Interest 
Payment
quarterly

Maturity 
Date
June 28, 2016

Purpose
  Operation

Sinovac  Beijing  entered  into  a  bank  loan  with  China  Merchants  Bank  in  the  aggregate  principal  amount  of  RMB30.0  million  ($4.6  million)  to  finance  its
working capital requirements bearing interest at 15% above the prime rate of a one-year term loan published by the People’s Bank of China, at 5.58% per year.
Interest is payable quarterly. The loan was drawn on June 30, 2015 and will be due on June 28, 2016. 

Type
Bank loan from Bank of Beijing

  Amount
  RMB19.0 million 
($2.9 million)

Yearly Interest
Rate
4.35% 

Interest
Payment
quarterly

Maturity 
Date

  November 29, 

2016

Purpose
  Operation

Sinovac  Beijing  entered  into  a  bank  loan  with  Bank  of  Beijing  in  the  aggregate  principal  amount  of  RMB50.0  million  ($7.7  million)  to  finance  its  working
capital requirements. The loan bears interest at 4.35% and is payable quarterly. The first RMB9.5 million ($1.5 million) was drawn on October 28, 2015 and
will be due on October 27, 2016. The second RMB9.5 million ($1.5 million) was drawn on November 30, 2015 and will be due on November 29, 2016. 

Our  weighted  average  effective  interest  rate  on  outstanding  borrowings  was  6.0%,  6.8%  and  6.6%  for  the  years  ended  December  31,  2015,  2014  and  2013,
respectively. We have not historically used, and do not expect to use in the future, any derivative financial instruments to manage our exposure to interest risk. 

Restrictions on Cash Dividends 

We are a holding company, and we rely in part on dividends paid by our subsidiaries, Sinovac Beijing, Sinovac Dalian, Sinovac R&D and Sinovac Biomed for
our cash needs, mainly our operating expenses. The payment of dividends in China is subject to limitations. Regulations in the PRC currently permit payment of
dividends only out of accumulated profits as determined in accordance with accounting standards and regulations in China. Our subsidiary is also required to set
aside at least a portion of its after-tax profit based on PRC accounting standards each year to fund the statutory surplus reserves. The reserves can be used to
recoup previous years’ losses, if any, and, subject to the approval of the relevant PRC government authority, may be converted into share capital in proportion to
their existing shareholdings, or by increasing the par value of the shares currently held by them. Such reserves, however, are not distributable as cash dividends.
In addition, at discretion of their board of directors, our subsidiaries may allocate a portion of its after-tax profits based on PRC accounting standards to the
employee  welfare  and  bonus  funds,  which  shall  be  utilized  for  collective  staff  benefits.  In  addition,  if  Sinovac  Beijing,  Sinovac  Dalian,  Sinovac  R&D  or
Sinovac Biomed incurs debt on its own behalf in the future, the instruments governing the debt may restrict the ability of one or more of our PRC subsidiaries,
as the case may be, to pay dividends or make other distributions to us. 

62

  
  
  
  
  
  
  
  
  
  
  
 
 
 
 
 
 
 
 
 
The  ability  of  our  subsidiary  to  convert  renminbi  into  U.S.  dollars  and  make  payments  to  us  is  subject  to  PRC  foreign  exchange  regulations.  Under  these
regulations, the renminbi is convertible for current account items, including the distribution of dividends, interest payments, trade and service-related foreign
exchange transactions. Conversion of renminbi for capital account items, such as direct investment, loan, security investment and repatriation of investment,
however, is still subject to the approval of the SAFE. See “Item 10. Additional Information — D. Exchange Controls.” 

Capital Expenditures 

We made capital expenditures of $5.3 million, $10.9 million and $5.1 million in 2015, 2014 and 2013, respectively. In 2015, we made $5.3 million of payments
towards property, plant and equipment for construction of PPV and varicella production facilities. As of December 31, 2015, our commitments related to capital
expenditures  of  approximately  $1.7  million  were  primarily  for  the  construction  of  our  PPV,  sIPV  and  varicella  production  facilities.  We  will  finance  such
commitments through short-term and long-term borrowings, proceeds from our public offering in 2010 and cash generated from operations. 

C. Research and Development, Patents and Licenses, Etc.

See discussions under “Item 5. Operating and Financial Review and Prospects — A. Operating Results — Research and Development Programs.” 

D. Trend Information

Other than  as disclosed  elsewhere  in this annual report,  we are  not  aware of  any  trends, uncertainties, demands, commitments or  events for  the period from
January 1, 2015 to December 31, 2015 that are reasonably likely to have a material adverse effect on our net revenues, income, profitability, liquidity or capital
resources, or that caused the disclosed financial information to be not necessarily indicative of future operating results or financial conditions. 

E. Off-Balance Sheet Arrangements

We do not, and did not, have any interest in variable interest entities or any other off-balance sheet arrangements that require disclosure. 

F. Tabular Disclosure of Contractual Obligations

The following table summarizes our estimated contractual obligations and commitments as of December 31, 2015 for the periods indicated: 

Debt obligations including amount owing to related party (including 

interest)

R&D expenses, liabilities and commitment
Operating lease obligations
Purchase of facilities commitments
Accounts payable and accrued liabilities
Total

Payments due by period

Total

Less than
1 year

1 – 3 years    

4 – 5 years

(in thousands)

More than
5 years

$

  $

$

25,920
441
12,861
1,726
22,524
63,472    $

$

25,048
441
852
1,726
22,524
50,591    $

79    $
—     
1,704     
—     
—     
1,783    $

$

793
—
1,704
—
—
2,497    $

—
—
8,601
—
—
8,601 

63

  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
 
 
 
G. Safe Harbor

This  annual  report  on  Form  20-F  contains  forward-looking  statements  that  relate  to  future  events,  including  our  future  operating  results  and  conditions,  our
prospects and our future financial performance and condition, all of which are largely based on our current expectations and projections. The forward-looking
statements are contained principally in the sections entitled “Item 3. Key Information — D. Risk Factors,” “Item 4. Information on the Company” and “Item 5.
Operating and Financial Review and Prospects.” These statements are made under the “safe harbor” provisions of the U.S. Private Securities Litigation Reform
Act  of  1995.  You  can  identify  these  forward-looking  statements  by  terminology  such  as  “may,”  “will,”  “expect,”  “anticipate,”  “future,”  “intend,”  “plan,”
“believe,”  “estimate,”  “is/are  likely  to”  or  other  and  similar  expressions.  Forward-looking  statements  involve  inherent  risks  and  uncertainties.  A  number  of
factors could cause actual results to differ materially from those contained in any forward-looking statement, including but not limited to the following: 



















our ability to maximize sales of our existing products within the Chinese market;

our ability to develop new vaccines;

our ability to improve our existing vaccines and lower our production costs;

our ability to expand our manufacturing facilities to meet need of the growing Chinese market and other geographic markets;

our ability to acquire new technologies and products;

uncertainties  in  and  the  timeliness  of  obtaining  necessary  governmental  approvals  and  licenses  for  marketing  and  sale  of  our  vaccines  in  certain
overseas markets;

our ability to compete successfully against our competitors;

risks associated with our corporate structure and the regulatory environment in China; and

other risks outlined in our filings with the Securities and Exchange Commission, or the SEC, including this annual report on Form 20-F.

The forward-looking statements made in this annual report on Form 20-F relate only to events or information as of the date on which the statements are made in
this annual report on Form 20-F. Except as required by law, we undertake no obligation to update or revise publicly any forward-looking statements, whether as
a result of new information, future events or otherwise, after the date on which the statements are made or to reflect the occurrence of unanticipated events. You
should  read  this  annual  report  on  Form  20-F  completely  and with  the  understanding that  our  actual  future results  may  be  materially  different  from what  we
expect. 

ITEM 6.

DIRECTORS, SENIOR MANAGEMENT AND EMPLOYEES

A. Directors and Senior Management

The following table sets forth information regarding our directors and executive officers as of the date of this annual report: 

Directors and Executive Officers
Weidong Yin
Simon Anderson(1) (2) (3)
Yuk Lam Lo(1) (2) (3)
Kenneth Lee(2) (3)
Meng Mei(1) (2) (3)
Nan Wang
Ming Xia
Qiang Gao
Jing Li

Position/Title
Chairman, President, Chief Executive Officer
Independent Director
Independent Director
Independent Director
Independent Director
Chief Financial Officer, Vice President
Vice President, Sales and Marketing
Vice President, Research and Development
Vice President, Quality and Production

Age
52
54
67
48
61
49
42
39
41

64

  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
(1) Member of the audit committee.
(2) Member of the nominating and corporate governance committee.
(3) Member of the compensation committee.

Mr. Weidong Yin has served as our chairman, president, chief executive officer and secretary since September 2003. Mr. Yin is also the general manager of
Sinovac Biotech and the chairman of Sinovac Hong Kong and Sinovac Dalian. He is the former general manager of Tangshan Yian Bioengineering Co., Ltd.,
and he previously worked as a medical doctor in infectious disease at the China Center for Disease Control and Prevention, Tangshan City, Hebei province. Mr.
Yin has been dedicated to hepatitis research for over 20 years and was instrumental in the development of Healive. In addition, Mr. Yin has been appointed as
the  principal  investigator  by  the  Chinese  Ministry  of  Science  and  Technology  for  many  key  governmental  R&D  programs  such  as  Inactivated  Hepatitis  A
Vaccine R&D, Inactivated SARS Vaccine R&D and New Human Influenza Vaccine (H5N1) R&D. He is also the president of Zhongguancun Listed Companies
Association. He obtained his MBA from the National University of Singapore. 

Mr.  Simon  Anderson  has  served  as  an  independent  director  of  our  company  since  July  2004.  Mr.  Anderson  is  a  member  of  our  audit,  compensation,  and
corporate  governance  and  nominating  committees.  Mr.  Anderson  provides  consulting  expertise  in  the  areas  of  regulatory  compliance,  exchange  listings  and
financial operations. He was admitted as a member of the Institute of Chartered Professional Accountants in British Columbia in 1986. Mr. Anderson serves as
chief  financial  officer  of  companies  listed  on  North  American  stock  exchanges,  including  IBC  Advanced  Alloys  Corp.,  which  manufactures  and  processes
alloys at its U.S. plants. Mr. Anderson also serves as a director of Simba Gold Corp., a gold exploration company. 

Mr.  Yuk  Lam  Lo  has  served  as  an  independent  director  of  our  company  since  March  2006.  Mr.  Lo  is  a  member  of  the  audit,  compensation  and  corporate
governance and nominating committees. Currently Mr. Lo is serving as the Chairman of the Advisory Council for Food Safety of the Food and Health Bureau
HKSAR, an Executive Committee Member of the Chinese Manufacturers’ Association of Hong Kong (CMA) and Chairman of the Education Committee of
CMA. Mr. Lo is also the Honorary Founding Chairman of Hong Kong Bio-Organization. In the educational area, Mr. Lo has been elected an Honorary Fellow
of  the  Hong  Kong  University  of  Science  and  Technology.  He  is  an  Honorary  Chairman  of  Hong  Kong  Food  Safety  Association,  Adjunct  Professor  of  the
Chinese University of Hong Kong and Honorary Professor of several universities in China. Mr. Lo was heavily involved in several committees of the HKSAR
Government. He had been appointed as Director of the Hong Kong Applied R&D Fund Co. Ltd., Chairman of the Biotechnology Committee of the Hong Kong
Industry & Technology Development Council, and Chairman of Biotechnology Projects Vetting Committee of the Innovation and Technology Fund, HKSAR.
In China, Mr. Lo is a Member of Chinese People’s Political Consultative Conference in Jilin province, and a Consultant of the Centre for Disease Control and
Prevention of China. In the business sector, he is an Independent Director of Luye Pharma Group Limited (2186.HK) and CSPC Pharmaceutical Group Limited
(1093.HK). 

Mr. Kenneth Lee is an independent director of Sinovac. He has served on our board of directors since May 2011. In July 2012, the board appointed him as a
member of the compensation committee and corporate governance and nominating committee. Mr. Lee is a partner at SAIF Partners. SAIF Partners IV L.P. is
currently the largest shareholder of Sinovac. Mr. Lee has more than 20 years of experience across private equity investments, corporate finance, and business
development in China. He is a non-executive director on the boards of four Chinese portfolio companies publicly listed on the stock exchanges in the United
States and Hong Kong and a board director for four other private Chinese companies backed by SAIF Partners. Mr. Lee is a graduate of Amherst College. 

Mr. Meng Mei has served as an independent director of our company since March 2012. Mr. Mei is the chairman of compensation committee, and member of
the  audit  and  corporate  governance  and  nominating  committees.  Mr.  Mei  founded  TusPark,  a  science  park  established  by  Tsinghua  University  in  1994,  to
incubate high growth companies. He has been the director of TusPark’s development center since its inception. Mr. Mei is also the Chairman of TusHoldings
Co.,  Ltd.,  which  is  engaged  in  the  development,  construction,  and  management  of  TusPark  and  is  providing  services  to  enterprises  based  in  TusPark.
TusHoldings  Co.,  Ltd.  is  also  involved  in  venture  capital  investments  in  China.  Mr.  Mei  sits  on  the  judging  expert  panel  of  China’s  National  Science  &
Technology Award. He has developed courses on entrepreneurship and new venture formation as a Tsinghua University professor and an entrepreneur. Mr. Mei
holds a bachelor’s degree in automation from Tsinghua University, PRC. 

Ms. Nan Wang has served as our chief financial officer since June 2013. Ms. Wang served as the vice president of Sinovac Beijing from 2001 to 2013 where she
oversaw business development, investment, and clinical research. From 1988 to 1993, Ms. Wang was a researcher in biology at the Life Science College of
Peking  University,  PRC.  From  1993  to  2001,  she  worked  as  a  manager  at  SinoBioway.  Ms.  Wang  received  her  bachelor’s  degree  in  biology  from  Peking
University and her master’s degree from University of International Business and Economics, PRC. Ms. Wang also received a diploma in financial management
from Beijing College for Entrepreneurs, PRC in 2003. 

65

  
  
  
  
  
  
  
  
  
 
 
Mr. Ming Xia has served as our vice president since April 2016. Mr. Xia has served as the vice president of Sinovac Beijing since 2011 where he oversees sales
and  marketing  departments.  Mr.  Xia  has  over  15  years’  experience  in  vaccine  sales  and  marketing  in  China.  He  joined  Sinovac  in  2002  and  has  served  as
Regional Sales Manager, National Sales Manager and Sales Director at Sinovac. Mr. Xia obtained his bachelor degrees in Biochemistry at Anhui University and
in International Trade at Shanghai Institute of Foreign Trade. Mr. Xia has made significant contributions to our sales revenue growth in previous years with
outstanding leadership and performance results. He kept his top record of generating sales revenue for many years after joining Sinovac. He is a leader with
creativity and developed the sales strategy for our existing products. Mr. Ming Xia organized the reform on sales and marketing strategy to meet the change of
the market situation. 

Mr. Qiang Gao has served as our vice president since April 2016. Mr. Gao joined Sinovac Beijing in 2002 and has served as quality control manager, quality
assurance  manager,  R&D  manager  and  R&D  director  at  Sinovac  Beijing  in  the  past  years,  and  the  general  manager  of  Sinovac  R&D  since  2010.  He  is
responsible for developing our new vaccine products, including EV71 vaccine. Mr. Gao received a master’s degree and a bachelor’s degree in microbiology
from the University of Agriculture, PRC. 

Ms. Jing Li has served as our vice president since April 2016. Ms. Li was named as quality person of Sinovac Beijing in March 2015. Since she joined Sinovac
Beijing in 2003, she has worked in different roles in production and quality function, including quality assurance vice manager, department manager of hepatitis
A vaccine production and director of vaccine production at Sinovac Beijing. Ms. Li is also in charge of the production of our EV71 vaccine. Ms. Li received a
master’s degree in physiology from the University of Agriculture, PRC. 

B. Compensation

In 2015, the aggregate cash compensation paid to our directors and executive officers was approximately $1.4 million. No executive officer is entitled to any
severance  benefits  upon  termination  of  his  or  her  employment  with  our  company.  The  bonus  plan  of  the  executive  offers  is  made  based  on  our  annual
performance in different functions and the respective key result areas of these functional teams. Each vice president’s bonus is determined based on the key
corporate development objectives and key performance index set by the compensation committee and approved by the board at the beginning of the year. The
bonus payoff plan is approved by the board. 

Our shareholders have authorized the board of directors to administer two share incentive plans which in aggregate provide for the issuance of up to 9,000,000
shares of common stock, including 5,000,000 shares reserved under the 2003 Stock Option Plan and 4,000,000 shares reserved under 2012 Share Incentive Plan.
The following tables summarize, as of March 31, 2016, the outstanding options and regular shares that we granted to several of our directors, executive officers,
principal  shareholders  and  to  other  individuals  as  a  group,  all  of  which  were  made  under  our  2003  Stock  Option  Plan  and  2012  Share  Incentive  Plan,
respectively. 

Name

Ming Xia
Other individual as a group
Total outstanding options

2003 Option Plan
Number of
Options

Exercise
Price

Grant Date

2.37/share

December 26, 2011

2.37/share

21,500
97,500
119,000

$

$

66

Expiration Date
December 25, 2017

  
  
  
  
  
  
  
  
  
 
2012 Share Incentive Plan

Name

Restricted
Shares

Number of
Options

Exercise
Price 
($/Share)

Grant Date  

Expiration
Date

Weidong Yin
Simon Anderson
Yuk Lam Lo
Meng Mei
Kenneth Lee
Nan Wang
Ming Xia
Others as a group
Subtotal

* Weighted Average Exercise Price

0
0
0
0
0
60,000
60,000
609,000   
729,000

150,000
40,000
40,000
40,000
40,000
90,000
90,000
851,000     

1,341,000

May 1, 2015  April 30, 2023
4.98
May 1, 2015  April 30, 2023
4.98
May 1, 2015  April 30, 2023
4.98
May 1, 2015  April 30, 2023
4.98
May 1, 2015  April 30, 2023
4.98
May 1, 2015  April 30, 2023
4.98
4.98
May 1, 2015  April 30, 2023
4.98    May 1, 2015  April 30, 2023 

Total

150,000
40,000
40,000
40,000
40,000
150,000
150,000
1,460,000 
2,070,000

We have not set aside or accrued any amount of cash to provide pension, retirement or other similar benefits to our officers and directors. Our PRC subsidiaries
and consolidated affiliated entities as well as their subsidiaries are required by law to make contributions equal to certain percentages of each employee’s salary
for his or her retirement benefit, medical insurance benefits, housing funds, unemployment and other statutory benefits. 

2003 STOCK OPTION PLAN 

Our board of directors adopted the 2003 Stock Option Plan, or the 2003 Plan, on November 1, 2003. The purpose of the plan is to attract and retain the best
available personnel for positions of substantial responsibility, provide additional incentive to employees, directors and consultants and promote the success of
our business. Our board of directors believes that our company’s long-term success is dependent upon our ability to attract and retain superior individuals who,
by virtue of their ability, experience and qualifications, make important contributions to our business. 

Set forth below is a summary of the principal terms of the 2003 Plan. 



Size of plan. We have reserved an aggregate of 5,000,000 of our common shares for issuance under the 2003 Plan. As of December 31, 2015, options
to  purchase  an  aggregate  of  904,400  of  our  common  shares  were  issued  and  outstanding  and  an  aggregate  of  4,017,800  common  shares  have  been
issued pursuant to options issued under the 2003 Plan.

 Administration. The 2003 Plan is administered by our board of directors. The board will determine the provisions, terms and conditions of each option
grant, including without limitation the option vesting schedule or exercise installment, the option exercise price, payment contingencies and satisfaction
of any performance criteria.

 Vesting schedule. The vesting schedules of options granted will be specified in the applicable option agreements.

 Option agreement. Options granted under the 2003 Plan are evidenced by option agreements that contain, among other things, provisions concerning
exercisability and forfeiture upon termination of employment or consulting arrangements by reason of death or otherwise, as determined by our board.
In addition, the option agreement also provides no option shares will be issued under the plan unless the Securities Act has been fully complied with.

 Option term. The term of options granted under the 2003 Plan may not exceed ten years from the date of grant.



Termination of options. Where the option agreement permits the exercise of the options granted for a certain period of time following the recipient’s
termination  of  services  with  us,  the  options  will  terminate  to  the  extent  any  options  are  not  exercised  or  purchased  on  the  last  day  of  the  specified
period or the last day of the original term of the options, whichever occurs first.

67

  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
   
   
   
   
   
   
   
   
   
  
 
 
 Change of control. If a third-party acquires us through the purchase of all or substantially all of our assets, a merger or other business combination, all

outstanding stock options will become fully vested and exercisable immediately prior to such transaction.



Termination of plans. Unless terminated earlier, the Plan will expire in 2023. Our board of directors has the authority to terminate the 2003 Plan prior
to the expiry of the plan provided that such early termination shall not affect the options then outstanding under the plan.

2012 SHARE INCENTIVE PLAN 

In August 2012, our shareholders adopted a 2012 Share Incentive Plan, or the 2012 Plan. The maximum aggregate number of common shares which may be
issued pursuant to all awards under the 2012 Plan is 4,000,000 shares. The following paragraphs describe the principal terms of the 2012 Plan. 

Types of Awards 

The types of awards we may grant under the plan include the options to purchase our common shares at a specified price and in a specified period determined by
our board. Under the 2012 Plan, we may also grant awards of our (1) restricted shares, (2) restricted share units, (3) dividend equivalents, (4) deferred shares,
(5) share payments and (6) share appreciation rights under the terms and conditions determined by our board of directors. 

Eligibility 

We  may  grant  awards  to  the  directors,  officers,  advisors  and  employees  of  us  and  our  wholly  owned  subsidiaries  and  any  entity  which  may  thereafter  be
established. 

Plan Administration 

Our board of directors will administer the plan. The board will determine the terms and conditions of each grant, including but not limited to, the exercise, grant
or purchase prices, any reload provision, any restrictions or limitations on the awards, vesting schedules, restrictions on the exercisability of the awards, any
accelerations or waivers, and any provision related to non-competition and recapture of gain on the awards. 

Award Agreement 

Awards granted under the plan will be evidenced by an award agreement that will set forth the terms, conditions and limitations for each award. The award
agreement should be signed by the employee and a director or an officer of us. Share awards may be evidenced by way of an issuance of certificates or book
entries  with  appropriate  legends.  The  certificates  and  book  entry  procedures  may  be  subject  to  counsels’  advice,  stop-transfer  orders  or  other  conditions  or
restrictions where the plan administrator deems necessary to comply with the required laws and regulations. 

Vesting 

The 2012 Plan provides that the administrator may set the period during which an option or a share appreciation right can be exercised and may determine that
an  option  or  a  share  appreciation  right  may  not  be  exercised  for  a  specified  period  after  it  is  granted.  Such  vesting  can  be  based  on  criteria  selected  by  the
administrator. At any time after the grant of an option or a share appreciation right, the administrator may, in its sole discretion and subject to the terms and
conditions it determines, accelerate the period during which an option or a share appreciation right vests. No portion of an option or a share appreciation right
exercisable at the termination of service of an option or a share appreciation right holder with our company or subsidiaries can become exercisable afterwards,
unless otherwise provided by the administrator. 

Exercise Price and Term of Awards 

The exercise price per share of options granted under the 2012 Plan is determined by the plan administrator in the award agreement. The price may be fixed or
variable related to the fair market value of our ordinary shares. The term of any option granted should not exceed ten years. However, in the case where our
incentive option is granted to an individual who, at the date of grant, owns more than ten percent of the total voting power of all classes of our shares, the price
granted shall not be less than 110% of the fair market value on the date of grant and the option is exercisable for no more than five years from the date of grant. 

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For common share awards granted under the 2012 Plan, namely (1) restricted shares, (2) restricted share units, (3) dividend equivalents, (4) deferred shares, and
(5) share payments, the consideration shall not be less than the par value of the shares purchased. The terms of the share awards are set by the plan administrator
in its sole discretion. 

The exercise price of share appreciation right under the 2012 Plan is determined by the plan administrator and set forth in the award agreement which may be a
fixed or variable price related to the fair market value of the shares. The term of the share appreciation right will not exceed ten years. 

The approval of shareholders is required for downward adjustment of the exercise prices of options or share appreciation rights. A downward adjustment of the
exercise prices of options or share appreciation rights means (i) lowering the exercise price of outstanding options or share appreciation rights, or (ii) cancelling
outstanding options or share appreciation rights in exchange for cash, other awards, or options or share appreciation rights with an exercise price that is less than
the exercise price of the original options or share appreciation rights. 

Transfer Restrictions 

The awards granted under the 2012 Plan may not be sold, pledged, assigned or transferred other than by will or the laws of descent and distribution or, subject to
the consent of the plan administrator, as required under the applicable laws. 

Amendments or Termination 

The 2012 Plan provides that in the event of any changes affecting our common shares or our share price, the plan administrator can make proportionate and
equitable adjustments to reflect such changes. Upon or in anticipation of a corporate transaction, including acquisition, disposal of substantially all or all assets,
reverse takeover, dissolution, the plan administrator should in its discretion provide for replacement or assumption of such award. In the event of other changes,
the board of directors should in its discretion make adjustments in the number and class of shares subject to awards outstanding on the date of such change to
prevent dilution or enlargement of rights. The 2012 Plan will expire and no further awards may be granted after the tenth anniversary of the date the plan was
adopted. 

C. Board Practices

Board of Directors 

Our Articles of Incorporation prescribe that we should have a minimum of one and a maximum of 15 directors. Currently, our board of directors comprises five
board members, four of whom are independent. A director is not required to hold any shares in the company by way of qualification. A director may vote with
respect  to  any  contract,  proposed  contract  or  arrangement  in  which  he  is  materially  interested  provided  that  such  director  must  disclose  his  interest  in  the
contract or arrangement. There is no age limit requirement for directors. Under Antigua law, our directors have a duty of loyalty to act honestly, in good faith
and with a view to our best interests. Our directors also have a duty to exercise the skill they actually possess and such care and diligence that a reasonably
prudent person  would exercise in comparable circumstances. In  fulfilling their duty of care to us, our directors must  ensure compliance with  our Articles  of
Incorporation and By-laws, as amended and re-stated from time to time. A shareholder has the right to seek damages if a duty owed by our directors is breached.

The functions and powers of our board of directors include, among others: 







convening shareholders’ annual general meetings and reporting its work to shareholders at such meetings;

declaring dividends and distributions;

appointing officers and determining the term of office of officers;

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



exercising the borrowing powers of our company and mortgaging the property of our company; and

approving the transfer of shares of our company, including the registering of such shares in our share register.

Terms of Directors and Executive Officers 

Our officers are elected by and serve at the discretion of the board of directors. Our directors are not subject to a term of office and hold office until a successor
is  elected  at  the  next  annual  shareholders’  meeting.  A  director  will  be  removed  from  office  automatically  if,  among  other  things,  the  director  (i)  becomes
bankrupt or makes any arrangement or composition with his creditors or (ii) dies or is found by our company to be or becomes of unsound mind. None of our
directors has a service contract with us or any of our subsidiaries providing for benefits upon termination of employment. 

Committees of the Board of Directors 

Our board of directors has established an audit committee, a compensation committee and a corporate governance and nominating committee. 

Audit Committee 

Our  audit  committee  consists  of  Messrs.  Simon  Anderson,  Yuk  Lam  Lo  and  Meng  Mei,  and  is  chaired  by  Simon  Anderson,  all  of  whom  satisfy  the
“independence” requirements of Rule 5605 of the NASDAQ Listing Rules and Rule 10A-3 under the Securities Exchange Act of 1934. The audit committee
oversees our accounting and financial reporting processes and the audits of the financial statements of our company. The audit committee is responsible for,
among other things: 















selecting our independent auditors and pre-approving all auditing and non-auditing services permitted to be performed by our independent auditors;

reviewing with our independent auditors any audit problems or difficulties and management’s response;

reviewing and approving all proposed related party transactions, as defined in Item 404 of Regulation S-K under the Securities Act;

discussing the annual audited financial statements with management and our independent auditors;

reviewing major issues as to the adequacy of our internal controls and any special audit steps adopted in light of material control deficiencies;

annually reviewing and reassessing the adequacy of our audit committee charter;

such other matters that are specifically delegated to our audit committee by our board of directors from time to time;

 meeting separately and periodically with management and our internal and independent auditors; and



reporting regularly to the full board of directors.

In 2015, our audit committee held meetings or passed resolutions by unanimous written consent nine times. 

Compensation Committee 

Our compensation committee consists of Messrs. Meng Mei, Simon Anderson, Yuk Lam Lo, and Kenneth Lee, and is chaired by Mr. Meng Mei, all of whom
satisfy  the  “independence”  requirements  of  Rule  5605  of  the  NASDAQ  Listing  Rules  and  Rule  10C-1  under  the  Securities  Exchange  Act  of  1934.  Our
compensation committee assists the board in reviewing and approving the compensation structure of our directors and executive officers, including all forms of
compensation to be provided to our directors and executive officers. Members of the compensation committee are not prohibited from direct involvement in
determining their own compensation. Our chief executive officer may not be present at any committee meeting during which his compensation is deliberated.
The compensation committee is responsible for, among other things: 

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







approving and overseeing the compensation package for our executive officers;

reviewing and making recommendations to the board with respect to the compensation of our directors;

reviewing and approving corporate goals and objectives relevant to the compensation of our chief executive officer, evaluating the performance of our
chief executive officer in light of those goals and objectives, and setting the compensation level of our chief executive officer based on this evaluation;
and

reviewing periodically and making recommendations to the board regarding any long-term incentive compensation or equity plans, programs or similar
arrangements, annual bonuses, employee pension and welfare benefit plans.

In 2015, our compensation committee held meetings or passed resolutions by unanimous written consent three times. 

Corporate Governance and Nominating Committee 

Our corporate governance and nominating committee consists of Messrs. Yuk Lam Lo, Simon Anderson, Kenneth Lee and Meng Mei, and is chaired by Mr.
Yuk Lam Lo, all of whom satisfy the “independence” requirements of Rule 5605 of the NASDAQ Listing Rules. The corporate governance and nominating
committee assists the board of directors in identifying individuals qualified to become our directors and in determining the composition of the board and its
committees. The corporate governance and nominating committee is responsible for, among other things: 









identifying and recommending to the board nominees for election or re-election to the board, or for appointment to fill any vacancy;

reviewing  annually  with  the  board  the  current  composition  of  the  board  in  light  of  the  characteristics  of  independence,  age,  skills,  experience  and
availability of service to us;

identifying and recommending to the board the directors to serve as members of the board’s committees;

advising the board periodically with respect to significant developments in the law and practice of corporate governance as well as our compliance with
applicable laws and regulations and making recommendations to the board on all matters of corporate governance and on any corrective action to be
taken; and

 monitoring compliance with our code of business conduct and ethics, including reviewing the adequacy and effectiveness of our procedures to ensure

proper compliance.

In 2015, our corporate governance and nominating committee held meetings or passed resolutions by unanimous written consent once. 

Interested Transactions 

A director may vote in respect of any contract or transaction in which he or she is interested, provided that the nature of the interest of any directors in such
contract or transaction is disclosed by him or her at or prior to its consideration and any vote in that matter. 

Remuneration and Borrowing 

The  directors  may  determine  remuneration  to  be  paid  to  the  directors.  The  compensation  committee  assists  the  directors  in  reviewing  and  approving  the
compensation structure for the directors. The directors may exercise all our powers to borrow money and to mortgage or charge its undertaking, property and
uncalled capital, and to issue debentures or other securities whether outright or as security for any debt obligations of our company or of any third party. 

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D. Employees

As of December 31, 2015, 2014 and 2013, we had 646, 668 and 715 full-time employees, respectively. Of our workforce as of December 31, 2015, about 140
employees are primarily engaged in research and development, 172 employees are engaged in sales and marketing, 271 employees in production related, and 61
employees in administration. As of December 31, 2015, we have a total of 111 temporary employees. We consider our relationship with our employees to be
good. 

E. Share Ownership

The following table sets forth information with respect to the beneficial ownership of our common shares, as of December 31, 2015, by: 





each of our directors and executive officers; and

each person/organization known to us to own beneficially more than 5% of our common shares.

The  calculations  in  the  table  below  are  based  on  56,906,561  common  shares  outstanding  as  of  December  31,  2015.  Beneficial  ownership  is  determined  in
accordance with the rules and regulations of the SEC. In computing the number of shares beneficially owned by a person and the percentage ownership of that
person, we have included shares that the person has the right to acquire within 60 days, including through the exercise of any option, warrant or other right or
the conversion of any other security. These shares, however, are not included in the computation of the percentage ownership of any other person. 

Directors and Executive Officers:
Weidong Yin
Simon Anderson
Yuk Lam Lo
Nan Wang
Ming Xia
All directors and executive officers as a group
Principal Shareholders
SAIF Partners IV(1)
1Globe Capital LLC(2)
Wellington Management Company LLP(3)
Chiang Li Family(4)
Samuel D. Isaly(5)

Shares Beneficially Owned
%

Number

6,049,500
50,000
50,000
105,000
141,000
6,395,500

10,780,820
9,353,092
5,229,421
3,459,763
2,667,500

10.63%
*
*
*
*
11.24%

18.94%
16.44%
9.19%
6.08%
4.69%

Less than 1% of our common shares.

*
(1) According to the Amendment No. 5 to Schedule 13D filed with the SEC on February 2, 2016 by SAIF Partners IV L.P., SAIF IV GP, L.P. and SAIF IV GP

Capital Ltd.

(2) According to the Amendment No. 1 to Schedule 13G filed with the SEC on April 5, 2016.
(3) According to the Amendment No. 2 to Schedule 13G filed with the SEC on February 11, 2016 by Wellington Management Group LLP, Wellington Group
Holdings  LLP,  Wellington  Investment  Advisors  Holdings  LLP  and  Wellington  Management  Company  LLP.  Wellington  Management  Group  LLP  is  a
parent  holding  company  of  certain  holding  companies  and  certain  investment  advisors,  including  Wellington  Management  Company  LLP.  Wellington
Investment Advisors Holdings LLP is owned by Wellington Group Holdings LLP. Wellington Group Holdings LLP is owned by Wellington Management
Group LLP.

(4) According to the Schedule 13G filed with the SEC on April 11, 2016.
(5) According  to  the  Amendment  No.  1  to  13G  filed  with  the  SEC  on  February  11,  2016,  consists  of  (i)  1,219,500  common  shares  beneficially  owned  by
OrbiMed Advisors LLC and (ii) 1,448,000 common shares beneficially owned by OrbiMed Capital LLC. OrbiMed Advisors LLC and OrbiMed Capital
LLC are investment advisors, and Samuel D. Isaly is the control person of OrbiMed Advisors LLC and OrbiMed Capital LLC.

None of our  existing shareholders has different voting rights  from  other shareholders. We are  not  aware of any arrangement that may, at  a subsequent date,
result in a change of control of our company. 

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As of December 31, 2015, 56,906,561 of our common shares were issued and outstanding. Approximately 89% of the issued and outstanding shares are held by
the record shareholders in the United States. 

For the options granted to our directors, officers and employees, please refer to “— B. Compensation of Directors and Executive Officers.” 

ITEM 7. MAJOR SHAREHOLDERS AND RELATED PARTY TRANSACTIONS

A. Major Shareholders

Please refer to “Item 6. Directors, Senior Management and Employees — E. Share Ownership.” 

B. Related Party Transactions

Transaction with Yuk Lam Lo 

Sinovac Hong Kong is using part of the office of Mr. Yuk Lam Lo, one of our independent directors, as its office. We do not pay any rent to Mr. Yuk and only
pay our share of the utilities and property management fees, which totaled $4,000, $4,000 and $4,000 in 2013, 2014 and 2015, respectively. 

Transactions with Certain Directors and Affiliates 

We  entered  into  two  operating  lease  agreements  with  SinoBioway,  a  non-controlling  shareholder  of  Sinovac  Beijing,  in  2004,  to  lease  Sinovac  Beijing’s
production plant and laboratory in Beijing with annual lease payments totaling RMB2.3 million ($0.4 million). The leases commenced on August 12, 2004 and
have a term of 20 years. One of the lease agreements was amended on August 12, 2010 to increase the rent from RMB0.5 million ($81,000) to RMB1.4 million
($0.2 million) per year. 

In June 2007, we entered into another operating lease agreement with SinoBioway for an annual lease payment of RMB2.0 million ($0.3 million) to expand
Sinovac Beijing’s production plant in Beijing. The lease commenced in June 2007 and has a term of 20 years. 

In  September  2010,  we  entered  into  another  operating  lease  agreement  with  SinoBioway  for  an  annual  lease  payment  of  RMB1.0  million  ($0.2  million)  to
expand Sinovac R&D’s business. The lease commenced on September 30, 2010 and has a term of five years. 

On April 8, 2013, we entered into three supplemental agreements with SinoBioway, under which the expiration date of three of the operating lease agreements
was extended to April 7, 2033. 

Loan from a non-controlling shareholder 

In  2011,  Sinovac  Dalian  entered  into  an  agreement  to  borrow  RMB20.0  million  ($3.1  million)  loan  from  its  non-controlling  shareholder,  Dalian  Jin  Gang
Group.  The  loan  was  unsecured,  bearing  interest  at  7.2%  per  year.  RMB4.0  million  ($0.6  million)  was  repaid  on  September  25,  2014.  No  repayments  were
made in 2015. 

Share Options 

See “Item 6. Directors, Senior Management and Employees — B. Compensation — 2003 Stock Option Plan” and “Item 6. Directors, Senior Management and
Employees — B. Compensation — 2012 Share Incentive Plan.” 

C.

Interests of Experts and Counsel

Not applicable. 

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ITEM 8.

FINANCIAL INFORMATION

A. Consolidated Statements and Other Financial Information

We have appended consolidated financial statements filed as part of this annual report. 

Legal and Administrative Proceedings 

We  are  not  currently  a  party  to  any  material  litigation  or  other  legal  proceedings  brought  against  us.  We  are  also  not  aware  of  any  legal  proceedings,
investigation or claim, or other legal exposure that has a more than remote possibility of having a material adverse effect on our business, financial condition or
results of operations. We may be subject to legal proceedings, investigations and claims incidental to the conduct of our business from time to time. 

Dividend Policy 

We have never declared or paid any dividends, nor do we have any present plan to pay any cash dividends on our common shares in the foreseeable future. We
currently intend to retain most, if not all, of our available funds and any future earnings to operate and expand our business. 

Our board of directors has complete discretion on whether to pay dividends. Even if our board of directors decides to pay dividends, the form, frequency and
amount will depend  upon our  future operations and earnings, capital  requirements and surplus, general financial condition,  contractual restrictions and other
factors that the board of directors may deem relevant. Cash dividends on our common shares, if any, will be paid in U.S. dollars. 

We  are  a  holding  company,  and  we  rely  on  the  dividends  paid  by  our  majority-owned  subsidiaries,  Sinovac  Beijing  and  Sinovac  Dalian,  wholly  owned
subsidiaries Sinovac R&D and Sinovac Biomed through Sinovac Hong Kong, for our cash needs, including the funds necessary to pay any dividends and other
cash  distributions  to  our  shareholders,  service  any  debt  we  may  incur  and  pay  our  operating  expenses.  The  payment  of  dividends  in  China  is  subject  to
limitations. Regulations in the PRC currently permit payment of dividends by our PRC subsidiaries only out of accumulated profits as determined in accordance
with accounting standards and regulations in China. In accordance with the regulations in China, Sinovac Beijing, Sinovac Dalian, Sinovac R&D and Sinovac
Biomed are required to set aside at least 10% of its after-tax profits each year to contribute to its reserve fund until the accumulated balance of such reserve fund
reaches 50% of the registered capital of each company. Sinovac Beijing, Sinovac Dalian, Sinovac R&D and Sinovac Biomed are required to set aside, at the
discretion of their respective board of directors, a portion of its after-tax profits to their employee welfare and bonus funds. 

Furthermore,  pursuant  to  the  double  tax  arrangement  between  Hong  Kong  and  PRC,  dividends  paid  by  a  foreign-invested  enterprise  in  China  to  its  direct
holding company in Hong Kong will be subject to withholding tax at a rate of no more than 5% (if the foreign investor owns directly at least 25% of the shares
of the foreign-invested enterprise for a period greater than 12 months), or otherwise 10%. Whether the favorable rate will be applicable to dividends received by
Sinovac  Hong  Kong  from  our  PRC  subsidiaries  is  subject  to  the  approval  of  the  PRC  tax  authorities  because  it  is  unclear  whether  Sinovac  Hong  Kong  is
considered  as  the  beneficial  owner  of  the  dividends  in  substance.  The PRC  tax  authorities  have  discretion  to  assess  whether  a  recipient  of  the  PRC-sourced
income is only an agent or a conduit, or lacks the requisite amount of business substance, in which case the application of the tax arrangement may be denied.
This  withholding  tax  imposed  on  dividends  paid  to  us  by  our  PRC  subsidiaries  would  reduce  our  net  income  attributable  to  the  shareholders.  In  May  2012,
Sinovac Hong Kong was granted by the local tax bureau the preferential dividend withholding tax rate of 5% on dividends declared by Sinovac Beijing for three
years  from  2012  to  2014.  The  State  Administration  of  Taxation  has  the  authority  to  re-assess  the  approval  of  the  preferential  dividend  withholding  tax  rate
granted by the local tax bureau. The preferential dividend withholding tax rate expired in 2014. The dividends received by Sinovac Hong Kong from its PRC
subsidiaries are subject to a withholding tax rate of 10%. 

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B. Significant Changes

Except  as  disclosed  elsewhere  in  this  annual  report,  we  have  not  experienced  any  significant  changes  since  the  date  of  our  audited  consolidated  financial
statements included in this annual report. 

ITEM 9.

THE OFFER AND LISTING

A. Offer and Listing Details

The table below sets forth, for the periods indicated, the high and low trading prices on the NASDAQ Global Market and the NASDAQ Global Select Market
for our common shares. 

Annual High and Low

2011
2012
2013
2014
2015

Quarterly High and Low

First quarter 2014
Second Quarter 2014
Third Quarter 2014
Fourth Quarter 2014
First Quarter 2015
Second Quarter 2015
Third Quarter 2015
Fourth Quarter 2015
First Quarter 2016
Monthly High and Low

October 2015
November 2015
December 2015
January 2016
February 2016
March 2016
April 2016 (through April 22, 2016)

B. Plan of Distribution

Not applicable. 

C. Markets

$

Trading Price

High

Low

4.92    $
3.50   
6.57   
8.14   
7.16   

8.14   
7.47   
6.03   
5.64   
5.36   
5.89   
6.00   
6.18   
7.16   

5.40   
5.51   
6.18   
5.99   
7.16   
6.47   
6.45   

1.91
1.64
3.00
4.51
4.38

5.98
5.50
4.51
4.62
4.56
4.85
4.90
4.95
4.38

4.95
5.11
5.18
4.38
6.30
6.35
6.23

Our common shares have been listed on the NASDAQ Global Select Market since January 3, 2011 under the symbol “SVA.” 

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D. Selling Shareholders

Not applicable. 

E. Dilution

Not applicable. 

F. Expenses of the Issue

Not applicable. 

ITEM 10. ADDITIONAL INFORMATION

A. Share Capital

Not applicable. 

B. Memorandum and Articles of Association

We  are  an  Antiguan  company  with  limited  liability  and  our  affairs  are  governed  by  our  Articles  of  Incorporation,  By-laws  and  the  International  Business
Corporation Act. The following are summaries of material provisions of our Articles of Incorporation, By-laws and the International Business Corporations Act.

General 

All  of  our  outstanding  common  shares  are  fully  paid  and  non-assessable.  The  common  shares  are  issued  in  registered  form.  Holders  of  common  shares  are
entitled to receive share certificates. Our shareholders who are non-residents of Antigua may freely hold and vote their common shares. 

Dividends 

The holders of our common shares are entitled to such dividends as may be declared by our board of directors subject to the International Business Corporations
Act. 

Voting Rights 

Each common share is entitled to one vote on all matters upon which the common shares are entitled to vote. 

A  quorum  required  for  a  meeting  of  shareholders  consists  of  shareholders  who  hold  at  least  a  majority  of  our  shares  at  the  meeting  present  in  person  or  by
proxy.  Shareholders’  meetings  are  held  annually  and  may  be  convened  by  our  board  of  directors  on  its  own  initiative  or  upon  a  request  to  the  directors  by
shareholders holding in aggregate at least five percent of our issued share capital. Advance notice of at least 21 days is required for the convening of our annual
general meeting and other shareholders meetings. 

Unless the International Business Corporations Act otherwise requires, resolutions to be passed by the shareholders requires a simple majority vote. Important
matters such as changes to our By-laws require a resolution passed by a vote of shareholders holding a majority of all the outstanding and issued shares. 

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Transfer of Common Shares 

Our  shareholders  may  transfer  common  shares  by  endorsing  the  relevant  share  certificates,  completing  a  share  transfer  form  or  by  other  proper  evidence  of
succession, assignment or authority to transfer. 

Liquidation 

On a return of capital on winding up or otherwise (other than on conversion, redemption or purchase of common shares), assets available for distribution among
the  holders  of  common  shares  shall  be  distributed  among  the  holders  of  the  common  shares  on  a  pro  rata  basis.  If  our  assets  available  for  distribution  are
insufficient to repay all of the paid-up capital, the assets will be distributed so that the losses are borne by our shareholders proportionately. 

Inspection of Books and Records 

Holders of our common shares will have no general right under Antigua law to inspect or obtain copies of our list of shareholders or our corporate records. They
may,  however,  access  such  corporate  information  as  is  publicly  available  in  the  Companies  Registry  in  St.  John’s,  Antigua.  We  will  also  provide  our
shareholders with annual audited consolidated financial statements. 

Changes in Capital 

We may from time to time by a resolution passed by a majority of the shares entitled to vote: 









increase the share capital by such sum, to be divided into shares of such classes and amount, as the resolution may prescribe;

consolidate and divide all or any of our share capital into shares of a larger amount than our existing shares;

sub-divide our existing shares, or any of them into shares of a smaller amount provided that in the subdivision the proportion between the amount paid
and the amount, if any unpaid on each reduced share shall be the same as it was in case of the share from which the reduced share is derived; and

cancel any shares which, at the date of the passing of the resolution, have not been taken or agreed to be taken by any person and diminish the amount
of our share capital by the amount of the shares so cancelled.

We may by special resolution reduce our share capital and any capital redemption reserve in any manner authorized by law. 

Differences in Corporate Law 

The International Business Corporations Act is modeled after English law but does not follow many recent English law statutory enactments. In addition, the
International Business Corporations Act differs from laws applicable to United States corporations and their shareholders. Set forth below is a summary of the
significant  differences  between  the  provisions  of  the  International  Business  Corporations  Law  applicable  to  us  and  the  laws  applicable  to  companies
incorporated in the United States and their shareholders. 

Mergers and Similar Arrangements 

Antigua  and  Barbuda  law  does  not  provide  for  mergers  as  that  expression  is  understood  under  United  States  corporate  law.  However,  there  are  statutory
provisions for amalgamation that facilitate the consolidation of companies, provided that the arrangement is approved by a majority number of each class of
shareholders and creditors with whom the arrangement is to be made, and who must in addition represent two-thirds in value of each such class of shareholders
or creditors, as the case may be, that are present and voting either in person or by proxy at a meeting, or meetings, convened for that purpose. The convening of
the meetings and subsequently the arrangement may be, but is not required to be, sanctioned by the High Court of Antigua and Barbuda. While a dissenting
shareholder has the right to express to the court his view that the transaction ought not to be approved, the court can be expected to approve the arrangement if it
determines that: 

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the statutory provisions as to the dual majority vote have been met;

the shareholders have been fairly represented at the meeting in question;

the arrangement is such that a businessman would reasonably approve; and

the arrangement is not one that would more properly be sanctioned under some other provision of the International Business Corporations Act.

When a take-over offer is made and accepted (within four months) by holders of 90% of the shares affected, the offerer may, within a two-month period, require
the holders of the remaining shares to transfer such shares on the terms of the offer. An objection can be made to the High Court of Antigua and Barbuda but
this is unlikely to succeed unless there is evidence of fraud, bad faith or collusion. 

If the arrangement and reconstruction is thus approved, the dissenting shareholder would have no rights comparable to appraisal rights, which would otherwise
ordinarily be available to dissenting shareholders of United States corporations, providing rights to receive payment in cash for the judicially determined value
of the shares. 

Shareholders’ Suits 

We are not aware of any reported class action or derivative action having been brought in a court in Antigua and Barbuda. In principle, the company itself will
normally be the proper claimant in actions against directors, and derivative actions may not generally be brought by a minority shareholder. However, based on
English authorities, which would in all likelihood be of persuasive authority in Antigua and Barbuda, there are exceptions to the foregoing principle, including
when: 

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a company acts or proposes to act illegally or ultra vires;

the act complained of, although not ultra vires, required a special resolution, which was not obtained; and

those who control the company are perpetrating a “fraud on the minority.”

Directors’ Fiduciary Duties 

Under Delaware corporate law, a director of a Delaware corporation has a fiduciary duty to the corporation and its shareholders. This duty has two components:
the duty of care and the duty of loyalty. The duty of care requires that a director act in good faith, with the care that an ordinarily prudent person would exercise
under  similar  circumstances.  Under  this  duty,  a  director  must  inform  himself  of,  and  disclose  to  shareholders,  all  material  information  reasonably  available
regarding  a  significant  transaction.  The  duty  of  loyalty  requires  that  a  director  act  in  a  manner  he  reasonably  believes  to  be  in  the  best  interests  of  the
corporation. He must not use his corporate position for personal gain or advantage. This duty prohibits self-dealing by a director and mandates that the best
interest of the corporation and its shareholders take precedence over any interest possessed by a director, officer or controlling shareholder and not shared by the
shareholders generally. In general, actions of a director are presumed to have been made on an informed basis, in good faith and in the honest belief that the
action taken was in the best interests of the corporation. However, this presumption may be rebutted by evidence of a breach of one of the fiduciary duties.
Should  such  evidence  be  presented  concerning  a  transaction  by  a  director,  a  director  must  prove  the  procedural  fairness  of  the  transaction,  and  that  the
transaction was of fair value to the corporation. As a matter of Antigua and Barbuda law, a director of an Antigua and Barbuda company is in the position of a
fiduciary with respect to the company and therefore it is considered that he owes the following duties to the company — a duty to act bona fide in the best
interests of the company, a duty not to make a profit out of his position as director (unless the company permits him to do so) and a duty not to put himself in a
position where the interests of the company conflict with his personal interest or his duty to a third-party. A director of an Antigua and Barbuda company owes
to the company a duty to act with skill and care. It was previously considered that a director need not exhibit in the performance of his duties a greater degree of
skill than may reasonably be expected from a person of his knowledge and experience. However, English and Commonwealth courts have moved towards an
objective standard with regard to the required skill and care and these authorities are likely to be followed in Antigua and Barbuda. 

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Shareholder Action by Written Consent 

Under the Delaware General Corporation Law, a corporation may eliminate the right of shareholders to act by written consent by amendment to its certificate of
incorporation. Antigua and Barbuda law and our By-laws provide that shareholders may approve corporate matters by way of a unanimous written resolution
signed by or on behalf of each shareholder who would have been entitled to vote on such matter at a general meeting without a meeting being held. 

Shareholder Proposals 

Under the Delaware General Corporation Law, a shareholder has the right to put any proposal before the annual meeting of shareholders, provided it complies
with the notice provisions in the governing documents. A special meeting may be called by the board of directors or any other person authorized to do so in the
governing  documents,  but  shareholders  may  be  precluded  from  calling  special  meetings.  Antigua  and  Barbuda  law  and  our  By-laws  allow  our  shareholders
holding not less than five per cent of the paid up voting share capital of the company to requisition a shareholder’s meeting. We are obligated under our By-laws
and the International Business Corporations Act to call shareholders’ annual general meetings. 

Cumulative Voting 

Under the Delaware General Corporation Law, cumulative voting for elections of directors is not permitted unless the corporation’s certificate of incorporation
specifically  provides  for  it.  Cumulative  voting  potentially  facilitates  the  representation  of  minority  shareholders  on  a  board  of  directors  since  it  permits  the
minority shareholder to cast all the votes to which the shareholder is entitled on a single director, which increases the shareholder’s voting power with respect to
electing such director. As permitted under Antigua and Barbuda law, our By-laws will not provide for cumulative voting. As a result, our shareholders are not
afforded any less protections or rights on this issue than shareholders of a Delaware corporation. 

Removal of Directors 

Under the Delaware General Corporation Law, a director of a corporation with a classified board may be removed only for cause with the approval of a majority
of the outstanding shares entitled to vote, unless the certificate of incorporation provides otherwise. Under our By-laws, directors can be removed by a majority
vote of the shareholders. 

Transactions with Interested Shareholders 

The Delaware General Corporation Law contains a business combination statute applicable to Delaware public corporations whereby, unless the corporation has
specifically  elected  not  to  be  governed  by  such  statute  by  amendment  to  its  certificate  of  incorporation,  it  is  prohibited  from  engaging  in  certain  business
combinations with an “interested shareholder” for three years following the date that such person becomes an interested shareholder. An interested shareholder
generally is a person or a group who or which owns or owned 15% or more of the target’s outstanding voting stock within the past three years. This has the
effect of limiting the ability of a potential acquirer to make a two-tiered bid for the target in which all shareholders would not be treated equally. The statute
does not apply if, among other things, prior to the date on which such shareholder becomes an interested shareholder, the board of directors approves either the
business combination or the transaction which resulted in the person becoming an interested shareholder. This encourages any potential acquirer of a Delaware
public corporation to negotiate the terms of any acquisition transaction with the target’s board of directors. 

Antigua  and  Barbuda  law  has  no  comparable  statute.  As  a  result,  we  cannot  avail  ourselves  of  the  types  of  protections  afforded  by  the  Delaware  business
combination statute. However, although Antigua and Barbuda law does not regulate transactions between a company and its significant shareholders, it does
provide that such transactions must be entered into bona fide in the best interests of the company and not with the effect of constituting a fraud on the minority
shareholders. 

Dissolution; Winding Up 

Under the Delaware General Corporation Law, unless the board of directors approves the proposal to dissolve, dissolution must be approved by shareholders
holding 100% of the total voting power of the corporation. Only if the dissolution is initiated by the board of directors may it be approved by a simple majority
of  the  corporation’s  outstanding  shares.  Delaware  law  allows  a  Delaware  corporation  to  include  in  its  certificate  of  incorporation  a  supermajority  voting
requirement  in  connection  with  dissolutions  initiated  by  the  board.  Under  the  International  Business  Corporations  Law,  our  company  may  be  dissolved,
liquidated or wound up only by the vote of holders of two-thirds of our shares voting at a meeting or the unanimous written resolution of all shareholders. 

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Variation of Rights of Shares 

Under the Delaware General Corporation Law, a corporation may vary the rights of a class of shares with the approval of a majority of the outstanding shares of
such class, unless the certificate of incorporation provides otherwise. Under Antigua and Barbuda law and our By-laws, if our share capital is divided into more
than one class of shares, we may vary the rights attached to any class only with the vote at a class meeting of holders of two-thirds of the shares of such class or
unanimous written resolution. 

Amendment of Governing Documents 

Under the Delaware General Corporation Law, a corporation’s governing documents may be amended with the approval of a majority of the outstanding shares
entitled to vote, unless the certificate of incorporation provides otherwise. As permitted by Antigua and Barbuda law, our By-laws may only be amended with
the vote of holders representing a majority of all our shares voting issued and outstanding or the unanimous written resolution of all shareholders. By-laws can
be amended by a vote or unanimous written resolution of the directors. 

Indemnification of Directors and Executive Officers and Limitation of Liability 

Antigua and Barbuda law does not limit the extent to which a company’s by-laws may provide for indemnification of officers and directors, except to the extent
any such provision may be held by the Antigua and Barbuda courts to be contrary to public policy, such as to provide indemnification against civil fraud or the
consequences of committing a crime. Our By-laws permit indemnification of officers and directors for losses, damages, costs and expenses incurred in their
capacities as such unless such losses or damages arise from negligence or illegal action of such directors or officers. This standard of conduct is generally the
same as permitted under the Delaware General Corporation Law to a Delaware corporation. In addition, we have entered into indemnification agreements with
our directors and senior executive officers that provide such persons with additional indemnification beyond that provided in our By-laws. 

Insofar as indemnification for liabilities arising under the Securities Act may be permitted to our directors, officers or persons controlling us under the foregoing
provisions,  we  have  been  informed  that  in  the  opinion  of  the  SEC  such  indemnification  is  against  public  policy  as  expressed  in  the  Securities  Act  and  is
therefore unenforceable as a matter of United States law. 

We have obtained directors and officers insurance providing indemnification for our directors for certain liabilities. 

Anti-takeover Provisions in the By-laws 

Some provisions of our By-laws may discourage, delay or prevent a change in control of our company or management that shareholders may consider favorable,
including provisions that authorize our board of directors to issue preferred shares in one or more series and to designate the price, rights, preferences, privileges
and restrictions of such preferred shares without any further vote or action by our shareholders. 

However, under Antigua and Barbuda law, our directors may only exercise the rights and powers granted to them under our By-laws for what they believe in
good faith to be in the best interests of our company. 

Rights of Non-resident or Foreign Shareholders 

There  are  no  limitations  imposed  by  our  By-laws  on  the  rights  of  non-resident  or  foreign  shareholders  to  hold  or  exercise  voting  rights  on  our  shares.  In
addition, there are no provisions in our By-laws governing the ownership threshold above which shareholder ownership must be disclosed. 

C. Material Contracts

We have  not entered into any material contracts other than  in the ordinary course of  business and  other than those described in “Item 4.  Information on the
Company” or elsewhere in this annual report on Form 20-F. 

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D. Exchange Controls

Foreign Currency Exchange 

Pursuant to the Foreign Currency Administration Rules promulgated in 1996 and amended in 1997 and various regulations issued by SAFE and other relevant
PRC government authorities, renminbi is freely convertible only to the extent of current account items, such as trade related receipts and payments, interest and
dividends.  Capital  account  items,  such  as  direct  equity  investments,  loans  and  repatriation  of  investment,  require  the  prior  approval  from  SAFE  or  its  local
counterpart for conversion of renminbi into a foreign currency, such as U.S. dollars, and remittance of the foreign currency outside the PRC. 

Payments for transactions that take place within PRC must be made in renminbi. Unless otherwise approved, PRC companies must repatriate foreign currency
payments received from abroad. Foreign-invested enterprises may retain foreign exchange in accounts with designated foreign exchange banks subject to a cap
set by SAFE or its local counterpart. Unless otherwise approved, domestic enterprises must convert all of their foreign currency receipts into renminbi. 

E. Taxation

Antigua and Barbuda Taxation 

We  and  our  securities  holders,  other  than those  resident  in  Antigua  and  Barbuda,  are exempt  from  Antigua  and  Barbuda  income,  corporation  or  profits  tax,
withholding tax, capital gains tax, capital transfer tax, estate duty or inheritance tax. We are not subject to stamp or other similar duty on the issuance, transfer or
redemption of our common shares. Under Section 276 of the International Business Corporations Act of Antigua and Barbuda, the tax exemption we and our
securities holders currently enjoy will continue in effect for a period of 50 years from our date of incorporation, which is March 1, 1999. No reciprocal income
tax treaty affecting us exists between Antigua and Barbuda and the United States. 

United States Federal Income Taxation 

The following discussion describes the material U.S. federal income tax consequences to U.S. Holders (as defined below) under current law of an investment in
our common shares. This discussion applies only to U.S. Holders that hold our common shares as capital assets (generally, property held for investment) and
have the U.S. dollar as their functional currency. This discussion is based on the tax laws of the United States as in effect on the date of this annual report and on
U.S. Treasury regulations in effect or, in some cases, proposed as of the date of this annual report, as well as judicial and administrative interpretations thereof
available  on  or  before  such  date.  All  of  the  foregoing  authorities  are  subject  to  change,  which  change  could  apply  retroactively  and  could  affect  the  tax
consequences  described  below.  The  following  discussion  does  not  address  all  U.S.  federal  income  tax  consequences  relevant  to  a  U.S.  Holder’s  particular
circumstances, including the impact of the Medicare contribution tax on net investment income. 

The following discussion does not deal with the tax consequences to any particular investor or to persons in special tax situations such as: 

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banks and other financial institutions;

insurance companies;

regulated investment companies;

real estate investment trusts;

broker-dealers;

traders that elect to use a mark-to-market method of accounting;

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 U.S. expatriates;

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tax-exempt entities;

persons liable for alternative minimum tax;

persons holding a common share as part of a straddle, hedging, conversion or integrated transaction;

persons that actually or constructively own 10% or more of the total combined voting power of all classes of our voting stock;

partnerships or other pass-through entities, or persons holding our common shares through such entities; or

persons who acquired our common shares pursuant to the exercise of any employee share option or otherwise as compensation.

INVESTORS ARE URGED TO CONSULT THEIR TAX ADVISORS REGARDING THE APPLICATION OF THE U.S. FEDERAL INCOME TAX RULES
TO THEIR PARTICULAR CIRCUMSTANCES AS WELL AS THE ESTATE AND GIFT, STATE, LOCAL AND FOREIGN TAX CONSEQUENCES TO
THEM OF THE PURCHASE, OWNERSHIP AND DISPOSITION OF OUR COMMON SHARES. 

The discussion below of the U.S. federal income tax consequences to “U.S. Holders” will apply to you if you are a beneficial owner of our common shares and
you are, for U.S. federal income tax purposes: 

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

an individual who is a citizen or resident of the United States;

a corporation (or other entity taxable as a corporation for U.S. federal income tax purposes) created or organized under the laws of the United States,
any state thereof or the District of Columbia;

an estate, the income of which is subject to U.S. federal income taxation regardless of its source; or

a trust that (1) is subject to the primary supervision of a court within the United States and the control of one or more U.S. persons for all substantial
decisions or (2) has a valid election in effect under applicable U.S. Treasury regulations to be treated as a U.S. person.

If a partnership (or other entity taxable as a partnership for U.S. federal income tax purposes) is a beneficial owner of our common shares, the tax treatment of a
partner in the partnership generally will depend upon the status of the partner and the activities of the partnership. 

Taxation of Dividends and Other Distributions on Our Common Shares 

Subject to the PFIC rules discussed below, the gross amount of any distributions we make to you with respect to our common shares generally will be includible
in your gross income in the year received as dividend income to the extent the distribution is paid out of our current or accumulated earnings and profits (as
determined under U.S. federal income tax principles). To the extent the amount of the distribution exceeds our current and accumulated earnings and profits,
such excess amount will be treated first as a tax-free return of your tax basis in your common shares, and then, to the extent such excess amount exceeds your
tax basis, as capital gain. We currently do not, and we do not intend to, calculate our earnings and profits under U.S. federal income tax principles. Therefore, a
U.S. Holder should expect that a distribution will generally be reported as a dividend even if that distribution would otherwise be treated as a non-taxable return
of  capital  or  as  capital  gain  under  the  rules  described  above.  Any  dividends  we  pay  will  not  be  eligible  for  the  dividends-received  deduction  allowed  to
corporations in respect of dividends received from U.S. corporations. 

With  respect  to  certain  non-corporate  U.S.  Holders,  including  individual  U.S.  Holders,  dividends  may  constitute  “qualified  dividend  income”  eligible  to  be
taxed  at  the  preferential  rate  applicable  to  capital  gains,  provided  that  (1)  our  common  shares  are  readily  tradable  on  an  established  securities  market  in  the
United States, or we are eligible for the benefits of a qualifying income tax treaty with the United States that includes an exchange of information program, (2)
we are neither a PFIC nor treated as such with respect to you (as discussed below) for the taxable year in which the dividend is paid or the preceding taxable
year and (3) certain holding period requirements are met. Under Internal Revenue Service authority, common shares are considered for the purpose of clause (1)
above to be readily tradable on an established securities market in the United States if they are listed on the NASDAQ Global Select Market, as our common
shares are. If we are treated as a “resident enterprise” for PRC tax purposes under the EIT Law (see “Item 10. Additional Information — E. Taxation — PRC
Taxation”), we may be eligible for the benefits of the income tax treaty between the United States and the PRC. You should consult your tax advisors regarding
the availability of the lower capital gains rate applicable to qualified dividend income for dividends paid with respect to our common shares. 

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Dividends generally will constitute foreign source income for foreign tax credit limitation purposes. If the dividends are taxed as qualified dividend income (as
discussed above), the amount of the dividend taken into account for purposes of calculating the U.S. foreign tax credit limitation generally will be limited to the
gross  amount  of  the  dividend,  multiplied  by  the  reduced  tax  rate  applicable  to  qualified  dividend  income  and  divided  by  the  highest  tax  rate  that  would  be
applicable to dividends if not for the reduced tax rate applicable to qualified dividend income.. The limitation on foreign taxes eligible for credit is calculated
separately with respect to specific classes of income. For this purpose, dividends distributed by us with respect to our common shares generally will constitute
“passive category income” but could, in the case of certain U.S. Holders, constitute “general category income.” 

If  PRC  withholding  taxes  apply  to  dividends  paid  to  you  with  respect  to  the  common  shares  (see  “Item  10. Additional  Information  —  E.  Taxation  —  PRC
Taxation”), subject to certain conditions and limitations, such PRC withholding taxes may be treated as foreign taxes eligible for credit against your U.S. federal
income  tax  liability.  The  rules  relating  to  the  determination  of  the  foreign  tax  credit  are  complex,  and  you  should  consult  your  tax  advisors  regarding  the
availability of a foreign tax credit in your particular circumstances. 

Taxation of Disposition of Our Common Shares 

Subject to the PFIC rules discussed below, you will recognize taxable gain or loss on any sale, exchange or other taxable disposition of a common share equal to
the difference between the amount realized for the common share and your tax basis in the common share. Your tax basis in our common shares will generally
equal the cost of such shares. The gain or loss generally will be capital gain or loss. If you are a non-corporate U.S. Holder, including an individual U.S. Holder,
who has held the common share for more than one year, you will be eligible for reduced tax rates. The deductibility of capital losses is subject to limitations. 

Any gain or loss you recognize on a disposition of our common shares generally will be treated as U.S. source income or loss for foreign tax credit limitation
purposes.  However,  if  we  are  treated  as  a  resident  enterprise  for  PRC  tax  purposes  and  PRC  tax  may  be  imposed  on  any  gain  from  the  disposition  of  the
common shares in accordance with the income tax treaty between the United States and the PRC (see “Item 10. Additional Information — E. Taxation — PRC
Taxation”), a U.S. Holder that is eligible for the benefits of the income tax treaty between the United States and the PRC may elect to treat the gain as PRC
source income. You should consult your tax advisors regarding the proper treatment of gain or loss in your particular circumstances. 

Passive Foreign Investment Company 

Based on the market price of our common shares, the value of our assets, and the composition of our income and assets, we do not believe we were a PFIC for
U.S. federal income tax purposes for our taxable year ended December 31, 2015. 

A non-U.S. corporation will be a PFIC for any taxable year if either: 

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at least 75% of its gross income for such year is passive income, or

at least 50% of the value of its assets (based on an average of the quarterly values of the assets) during such year is attributable to assets that produce
passive income or are held for the production of passive income.

For  purposes  of  the  PFIC  rules,  passive  income  includes,  among  other  things,  dividends,  interest,  royalties,  rents,  annuities,  and  net  gains  from  certain
commodity  and  foreign  currency  transactions,  subject  to  certain  exceptions.  Passive  income  generally  does  not  include  rents  and  royalties  derived  from  the
active conduct  of a trade or business (other than from a related person). We  will be treated as  owning our proportionate share  of the assets  and earning  our
proportionate share of the income of any other corporation in which we own, directly or indirectly, at least 25% (by value) of the stock. 

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We must make a separate determination after the close of each year as to whether we were a PFIC for that year. The composition of our income and assets will
be affected by how, and how quickly, we use any cash we generate from our operations or raise in any offering. Because the value of our assets for purposes of
the PFIC test will generally be determined by reference to the market price of our common shares, fluctuations in the market price of our common shares may
cause us to become a PFIC for any subsequent year. If we are a PFIC for any year during which you hold our common shares, we generally will continue to be
treated as a PFIC with respect to you for all succeeding years during which you hold our common shares, unless we cease to be a PFIC and you make a “deemed
sale” election with respect to our common shares. If such election is made, you will be deemed to have sold common shares you hold at their fair market value
and any gain from such deemed sale would be subject to the rules described in the following two paragraphs. After the deemed sale election, your common
shares with respect to which such election was made will not be treated as shares in a PFIC unless we subsequently become a PFIC. 

For each taxable year we are treated as a PFIC with respect to you, you will be subject to special tax rules with respect to any “excess distribution” you receive
and  any  gain  you  recognize  from  a  sale  or  other  disposition  (including  a  pledge)  of  the  common  shares,  unless  you  make  a  “mark-to-market”  election  as
discussed below. Distributions you receive in a taxable year that are greater than 125% of the average annual distributions you received during the shorter of the
three preceding taxable years or your holding period for the common shares before the current year will be treated as an excess distribution. Under these special
tax rules: 

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the excess distribution or recognized gain will be allocated ratably over your holding period for the common shares;

the  amount allocated to the current taxable  year,  and any taxable  years  in  your holding period  prior  to the  first  taxable year  in which we became a
PFIC, will be treated as ordinary income; and

the amount allocated to each other year will be subject to the highest income tax rate in effect for individuals or corporations, as applicable, for each
such year, and the interest charge generally applicable to underpayments of tax will be imposed on the resulting tax attributable to each such year.

The tax liability for amounts allocated to years prior to the year of disposition or excess distribution cannot be offset by any net operating losses for such years,
and gains (but not losses) from a sale or other disposition of the common shares are not taxed at reduced tax rates, even if you hold the common shares as capital
assets. 

If we are treated as a PFIC with respect to you for any taxable year, to the extent any of our subsidiaries are also PFICs or we make direct or indirect equity
investments in other entities that are PFICs, you will be deemed to own shares in such lower-tier PFICs directly or indirectly owned by us in the proportion that
the value of the common shares you own bears to the value of all of our common shares, and you may be subject to the rules described in the preceding two
paragraphs with respect to the shares of such lower-tier PFICs that you would be deemed to own. You should consult your tax advisors regarding the application
of the PFIC rules to any of our subsidiaries. 

A U.S. Holder of marketable stock (as defined below) in a PFIC may make a mark-to-market election for such stock to elect out of the PFIC rules described
above regarding excess distributions and recognized gains. If you make a mark-to-market election for the common shares, you will include in income for each
year that we are a PFIC an amount equal to the excess, if any, of the fair market value of the common shares as of the close of your taxable year over your
adjusted basis in such common shares. You will be allowed a deduction for the excess, if any, of the adjusted basis of the common shares over their fair market
value  as  of  the  close  of  the  taxable  year. However,  deductions  will  be  allowable  only  to  the  extent  of  any  net  mark-to-market  gains  on  the  common  shares
included in your income for prior taxable years. Amounts included in your income under a mark-to-market election, as well as gain from the actual sale or other
disposition of the common shares will be treated as ordinary income. Ordinary loss treatment will apply to the deductible portion of any mark-to-market loss on
the common shares, as well as to any loss from the actual sale or other disposition of the common shares, to the extent that the amount of such loss does not
exceed the net mark-to-market gains previously included for such common shares. Your basis in the common shares will be adjusted to reflect any such income
or loss amounts. If you make a valid mark-to-market election, any distributions we make would generally be subject to the tax rules discussed above under “—
Taxation of Dividends and Other Distributions on Our Common Shares,” and the lower capital gains rate applicable to qualified dividend income would not
apply. 

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The mark-to-market election is available only for “marketable stock,” which generally is defined as stock that is traded in greater than de minimis quantities on
at least 15 days during each calendar quarter (“regularly traded”) on a qualified exchange or other market, as defined in applicable U.S. Treasury regulations.
Our common shares are listed on the NASDAQ Global Select Market, which is a qualified exchange or other market for these purposes. Consequently, if the
common shares remain listed on the NASDAQ Global Select Market and are regularly traded, and you are a holder of common shares, we expect the mark-to-
market election would be available to you if we become a PFIC. Because a mark-to-market election cannot be made for equity interests in any lower-tier PFICs
that we own, a U.S. Holder may continue to be subject to the PFIC rules described above regarding excess distributions and recognized gains with respect to its
indirect interest in any investments held by us that are treated as an equity interest in a PFIC for U.S. federal income tax purposes. 

Alternatively, a U.S. Holder of stock in a PFIC may make a “qualified electing fund” election with respect to such corporation to elect out of the PFIC rules
described above regarding excess distributions and recognized gains. A U.S. Holder that makes a qualified electing fund election with respect to a PFIC will
generally  include  in  income  such  holder’s  pro  rata  share  of  the  corporation’s  income  on  a  current  basis.  However,  you  may  make  a  qualified  electing  fund
election with respect to your common shares only if we furnish you annually with certain tax information, and we currently do not intend to prepare or provide
such information. 

Each U.S. shareholder of a PFIC is required to file an annual report containing such information as the U.S. Treasury requires. If we become a PFIC, you should
consult your tax advisors regarding any reporting requirements that may apply to you. 

You are urged to consult your tax advisors regarding the application of the PFIC rules to your investment in our common shares. 

Information Reporting and Backup Withholding 

Dividend  payments  with  respect  to  our  common  shares  and  proceeds  from  the  sale,  exchange  or  redemption  of  our  common  shares  may  be  subject  to
information  reporting  to  the  Internal  Revenue  Service  and  possible  U.S.  backup  withholding  at  a  current  rate  of  28%.  Backup  withholding  will  not  apply,
however, to a U.S. Holder that furnishes a correct taxpayer identification number and makes any other required certification on Internal Revenue Service Form
W-9  or  that  is  otherwise  exempt  from  backup  withholding.  U.S.  Holders  that  are  required  to  establish  their  exempt  status  generally  must  provide  such
certification on Internal Revenue Service Form W-9. U.S. Holders should consult their tax advisors regarding the application of the U.S. information reporting
and backup withholding rules. 

Backup withholding is not an additional tax. Amounts withheld as backup withholding may be credited against your U.S. federal income tax liability, and you
may obtain a refund of any excess amounts withheld under the backup withholding rules by filing the appropriate claim for refund with the Internal Revenue
Service and furnishing any required information in a timely manner. 

Additional Reporting Requirements 

Certain U.S. Holders who are individuals are required to report information relating to an interest in our common shares, subject to certain exceptions (including
an  exception  for  common  shares  held  in  accounts  maintained  by  certain  financial  institutions).  U.S.  Holders  should  consult  their  tax  advisors  regarding  the
effect, if any, of these rules on their ownership and disposition of our common shares. 

PRC Taxation 

Under the EIT Law, enterprises established under the laws of non-PRC jurisdictions but whose “de facto management body” is located in China are considered
“resident enterprises” for PRC tax purposes. Under the implementation regulations issued by the State Council relating to the EIT Law, “de facto management
bodies” are defined as the bodies that have material and overall management control over the business, personnel, accounts and properties of an enterprise. In
2009, the State Administration of Taxation issued a circular, known as Circular 82, which provides certain specific criteria for determining whether the “de facto
management  body”  of  a  PRC-controlled  offshore  incorporated  enterprise  is  located  in  China.  Although  this  circular  only  applies  to  offshore  enterprises
controlled by PRC enterprises or PRC enterprise groups, not those controlled by PRC individuals or foreigners, the criteria set forth in the circular may reflect
the State Administration of Taxation’s general position on how the “de facto management body” text should be applied in determining the tax resident status of
all offshore enterprises. According to Circular 82, an offshore incorporated enterprise controlled by a PRC enterprise or a PRC enterprise group will be regarded
as a PRC tax resident by virtue of having its “de facto management body” in China only if all of the following conditions are met: (i) the primary location of the
day-to-day operational management is in the PRC; (ii) decisions relating to the enterprise’s financial and human resource matters are made or are subject to
approval  by  organizations  or  personnel  in  the  PRC;  (iii)  the  enterprise’s  primary  assets,  accounting  books  and  records,  company  seals,  and  board  and
shareholders minutes, are located or maintained in the PRC; and (iv) at least 50% of voting board members or senior executives habitually reside in the PRC.
Substantially all of our management are currently based in China, and may remain in China in the future. If we were treated as a “resident enterprise” for PRC
tax  purposes,  we  would  be  subject  to  PRC  income  tax  on  our  worldwide  income  at  a  uniform  tax  rate  of  25%.  Dividends  received  by  us  from  our  PRC
subsidiaries may be exempt from PRC withholding tax. 

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Under  the  EIT  Law  and  its  implementation  regulations,  dividends  paid  to  a  non-PRC  investor  are  generally  subject  to  a  10%  PRC  withholding  tax,  if  such
dividends are derived from sources within China and the non-PRC investor is considered to be a non-resident enterprise without any establishment or place of
business within China or if the dividends paid have no connection with the non-PRC investor’s establishment or place of business within China, unless such tax
is eliminated or reduced under an applicable tax treaty. Similarly, any gain realized on the transfer of common shares by such investor is also subject to a 10%
PRC withholding tax if such gain is regarded as income derived from sources within China, unless such tax is eliminated or reduced under an applicable tax
treaty. 

If we were considered a PRC “resident enterprise”, it is possible that the dividends we pay with respect to our common shares, or the gain you may realize from
the transfer of our common shares, would be treated as income derived from sources within China and be subject to income tax at 10%. 

F. Dividends and Paying Agents

Not applicable. 

G. Statement by Experts

Not applicable. 

H. Documents on Display

We are subject to the periodic reporting and other informational requirements of the Exchange Act. Under the Exchange Act, we are required to file reports and
other information with the SEC. Specifically, we are required to file annually a Form 20-F within four months after the end of each fiscal year. Copies of reports
and other information, when so filed, may be inspected without charge and may be obtained at prescribed rates at the public reference facilities maintained by
the SEC at Judiciary Plaza, 100 F Street, N.E., Washington, D.C. 20549, and at the regional office of the SEC located at Citicorp Center, 500 West Madison
Street, Suite 1400, Chicago, Illinois 60661. The public may obtain information regarding the Washington, D.C. Public Reference Room by calling the SEC at 1-
800-SEC-0330. The SEC also maintains a web site at www.sec.gov that contains reports, proxy and information statements, and other information regarding
registrants that make electronic filings with the SEC using its EDGAR system. As a foreign private issuer, we are exempt from the rules under the Exchange
Act  prescribing  the  furnishing  and  content  of  quarterly  reports  and  proxy  statements,  and  officers,  directors  and  principal  shareholders  are  exempt  from  the
reporting and short-swing profit recovery provisions contained in Section 16 of the Exchange Act. 

We will furnish the transfer agent of our common shares, with our annual reports, which will include a review of operations and annual audited consolidated
financial statements prepared in conformity with U.S. GAAP, and all notices of shareholders’ meetings and other reports and communications that are made
generally available to our shareholders. The transfer agent will make such notices, reports and communications available to holders of our common shares and,
upon  our  request,  will  mail  to  all  record  holders  of  our  common  shares  the  information  contained  in  any  notice  of  a  shareholders’  meeting  received  by  the
transfer agent from us. 

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In accordance with the NASDAQ Rules, we will post this annual report on Form 20-F on our website www.sinovac.com. In addition, we will provide hardcopies
of our annual report free of charge to shareholders upon request. 

I.

Subsidiary Information

For a listing of our subsidiaries, see “Item 4. Information on the Company — C. Organizational Structure.” 

ITEM 11. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Foreign Exchange Risk 

Substantially all of our revenues and most of our costs and our expenses are denominated in renminbi. Our exposure to foreign exchange risk primarily relates
to cash and cash equivalents denominated in U.S. dollars as a result of our past issuances of common shares through a private placement and proceeds from our
public offering of common shares. Furthermore, the renminbi prices of some of the materials and supplies for reagent kits that are imported from companies in
the United States, Sweden and United Kingdom may be affected by fluctuations in the value of renminbi against the currencies of those countries. We also incur
professional,  investor  relations,  director  compensation  and  miscellaneous  fees  related  to  our  operations  as  a  public  company  that  are  denominated  in  U.S.
dollars. 

The value of the renminbi against the U.S. dollar and other currencies may fluctuate and is affected by, among other things, changes in China’s political and
economic conditions. The conversion of renminbi into foreign currencies, including U.S. dollars, has been based on rates set by the People’s Bank of China. The
PRC  government  allows  the  renminbi  to  fluctuate  within  a  narrow  and  managed  band  against  a  basket  of  certain  foreign  currencies.  In  recent  years,  the
exchange rate between the renminbi and U.S. dollar has been relatively stable and consequently the renminbi has fluctuated sharply against other freely traded
currencies in tandem with the U.S. dollar. The PRC government has indicated that it will make effort to widen the trading band of the renminbi exchange rate,
which increases the possibility of sharp fluctuations in renminbi’s value in the future as well as the unpredictability associated with renminbi’s exchange rate.
By way of example, assuming we had converted a U.S. dollar denominated cash balance of $1.0 million as of December 31, 2015 into renminbi at the exchange
rate of $1.00 for RMB6.4778 as of December 31, 2015, such a cash balance would have been RMB6.48 million. Assuming a 1% appreciation/depreciation of
the renminbi against the U.S. dollar, such a cash balance would have decreased/increased by RMB64,800 as of December 31, 2015. 

Our  financial  statements  are  expressed  in  U.S.  dollars  but  our  subsidiaries’  functional  currency  is  renminbi.  The  value  of  our  shares  will  be  affected  by  the
foreign exchange rate between U.S. dollars and renminbi. To the extent we hold assets denominated in U.S. dollars, any appreciation of the renminbi against the
U.S. dollar could result in a change to our statements of comprehensive income and a reduction in the value of our U.S. dollar denominated assets. On the other
hand,  a  decline  in  the  value  of  renminbi  against  the  U.S.  dollar  could  reduce  the  U.S.  dollar  equivalent  amounts  of  our  financial  results,  the  value  of  your
investment in our company and the dividends we may pay in the future, if any, all of which may have a material adverse effect on the prices of our shares. 

Interest Rate Risk 

Our exposure to interest rate risk relates primarily to the interest expense associated with our short-term and/or long-term bank borrowings as well as interest
income provided by excess cash invested in demand and term deposits. Such borrowing and interest-earning instruments carry a degree of interest rate risk. We
have not historically used, and do not expect to use in the future, any derivative financial instruments to manage our exposure to interest risk. We have not been
exposed nor do we anticipate being exposed to material risks due to changes in interest rates. The weighted effective interest rate on our outstanding loans was
6.0%, 6.8% and 6.6% for the years ended December 31, 2015, 2014 and 2013. A hypothetical increase or decrease in interest rates of 1% would increase or
decrease our annual interest and financing expenses by $0.2 million based on our outstanding indebtedness as of December 31, 2015. 

ITEM 12. DESCRIPTION OF SECURITIES OTHER THAN EQUITY SECURITIES

Not applicable. 

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PART II 

ITEM 13. DEFAULTS, DIVIDEND ARREARAGES AND DELINQUENCIES

None. 

ITEM 14. MATERIAL MODIFICATIONS TO THE RIGHTS OF SECURITY HOLDERS AND USE OF PROCEEDS

A. — D. Material Modifications to the Rights of Security Holders 

In March 2016, we adopted the Rights Plan. Pursuant to the Rights Plan, subject to limited exceptions, upon (i) a person or group obtaining ownership of 15%
or more of our common shares or (ii) the commencement or announcement of an intention to make a tender offer or exchange offer, the consummation of which
would  result  in  the  beneficial  ownership  by  a  person  or  group  of  15%  or  more  of  our  common  shares,  in  each  case,  without  the  approval  of  our  board  of
directors, each Right will entitle the holders, other than the Acquiring Person, to buy, at an exercise price of $30.00, one one-thousandth of a Series A Preferred
Share. Holders are entitled to receive, in lieu of each one one-thousandths of a Series A Preferred Share, common shares having a market value at that time of
twice the Right’s exercise price. Our board of directors is entitled to redeem the Rights at $0.001 per Right at any time before the Rights are exercisable. 

E. Use of Proceeds 

On  February  2,  2010,  we  completed  a  follow-on  public  offering  of  our  common  shares.  In  this  follow-on  offering,  we  issued  and  sold  an  aggregate  of
11,500,000 common shares at $5.75 per share. The common shares offered and sold were registered pursuant to the registration statement on Form F-3 (File
Number: 333-163165) effective on November 30, 2010 and the registration statement on Form F-3 (File Number: 333-164559) effective on January 27, 2010.
UBS Securities LLC and Piper Jaffray & Co. were the representatives of the underwriters of the offering. We received net proceeds of approximately $61.8
million, after deducting underwriting discounts and commissions and estimated offering expenses payable by us. We have spent approximately $16.4 million in
the acquisition of Sinovac Dalian and $25.4 million in pipeline development and corporate activities of entities in PRC. 

We intend to use the remaining net proceeds we received from this offering for the following purposes: 





up to $10.0 million to fund the research and development of our product candidates; and

the remaining amount for general corporate purposes.

The foregoing use of our net proceeds received from this offering represents our current intentions based upon our present plans and business condition. The
amounts and timing of any expenditure will vary depending on the amount of cash generated by our operations, competitive and technological developments
and the rate of growth, if any, of our business. Accordingly, our management will have significant discretion in the allocation of the net proceeds we received
from this offering. Depending on future events and other changes in the business climate, we may determine at a later time to use the net proceeds for different
purposes, including repayment of certain of our outstanding bank borrowings. Pending the use of the net proceeds, we intend to invest the net proceeds in a
variety of capital preservation instruments, including short-term, investment-grade, interest-bearing instruments. 

ITEM 15. CONTROLS AND PROCEDURES

Disclosure Controls and Procedures 

In  connection  with  the  preparation  of  this  annual  report  on  Form  20-F,  we  carried  out  an  evaluation  of  the  effectiveness  of  our  disclosure  controls  and
procedures, which is defined in Rules 13a-15(e) of the Exchange Act, as of the period covered by this annual report. 

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Based on this evaluation, our chief executive officer and chief financial officer concluded that, as of December 31, 2015, our disclosure controls and procedures
were  effective  in  ensuring  that  the  information  required  to  be  disclosed  by  us  in  the  reports  that  we  file  or  submit  under  the  Exchange  Act  was  recorded,
processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that the information required to be disclosed by us in
the reports that we file or submit under the Exchange Act is accumulated and communicated to our management, including our chief executive officer and chief
financial officer, to allow timely decisions regarding required disclosure. 

Management’s Annual Report on Internal Control over Financial Reporting 

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, which is defined in Rules 13a-15(f) and 15d-
15(f)  of  the  Exchange  Act.  Our  internal  control  system  was designed  to provide  reasonable  assurance  regarding  the  reliability  of  financial  reporting  and  the
preparation and fair presentation of the consolidated financial statements for external purposes in accordance with accounting principles generally accepted in
the United States and includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect
the transactions and dispositions of a company’s assets, (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of
consolidated financial statements in accordance with generally accepted accounting principles, and that a company’s receipts and expenditures are being made
only  in  accordance  with  authorizations  of  a  company’s  management  and  directors,  and  (iii)  provide  reasonable  assurance  regarding  prevention  or  timely
detection of unauthorized acquisition, use, or disposition of a company’s assets that could have a material effect on the consolidated financial statements. 

Our  management  conducted  an  assessment  of  the  effectiveness  of  our  internal  control  over  financial  reporting  as  of  December  31,  2015.  In  making  this
assessment, we used the criteria established within the Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the
Treadway Commission (2013 framework). This evaluation included review of the documentation of controls, evaluation of the design effectiveness of controls,
testing of the operating effectiveness of controls and a conclusion on this evaluation. All internal control systems, no matter how well designed, have inherent
limitations. Therefore, even those systems determined to be effective may not prevent or detect misstatements and can provide only reasonable assurance with
respect  to  financial  statement  preparation  and  presentation.  Also,  projections  of  any  evaluation  of  effectiveness  to  future  periods  are  subject  to  the  risk  that
controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. 

Based on this assessment, our management has concluded that our internal control over financial reporting was effective as of December 31, 2015. 

Ernst & Young Hua Ming LLP, an independent registered public accounting firm that audited the financial statements included in this annual report, has issued
an attestation report on the effectiveness of our internal control over financial reporting. 

Attestation Report of the Registered Public Accounting Firm 

The attestation report issued by Ernst & Young Hua Ming LLP, an independent registered public accounting firm, on the effectiveness of internal control over
financial reporting can be found on page F-4 of this annual report. 

Changes in Internal Control over Financial Reporting 

As required by Rule 13a-15(d), under the Exchange Act, our management, including our chief executive officer and chief financial officer, has conducted an
evaluation of our internal control over financial reporting to determine whether any changes occurred during the period covered since last report have materially
affected, or are reasonably likely to materially affect, our internal control over financial reporting. Based on this evaluation, it has been determined that there has
been no change during the period covered by this annual report. 

ITEM 16A. AUDIT COMMITTEE FINANCIAL EXPERT

Our board of directors has determined that we have at least one audit committee financial expert serving on our audit committee. Our audit committee financial
expert  is  Mr.  Simon  Anderson.  Each  member  of  our  audit  committee,  including  Mr.  Anderson,  satisfies  the  “independence”  requirements  of  the  NASDAQ
Marketplace rule and Rule 10A-3 under the Exchange Act. 

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ITEM 16B. CODE OF ETHICS

Our board of directors has adopted a code of ethics that applies to our directors, officers, employees and agents, including certain provisions that specifically
apply to our chief executive officer, chief financial officer, vice presidents and any other persons who perform similar functions for us. We have filed our code
of business conduct and ethics as an exhibit our annual report on Form 20-F (file no. 001-32371) filed with the SEC on July 14, 2006, and posted the code on
our website at www.sinovac.com. We hereby undertake to provide to any person without charge, a copy of our code of business conduct and ethics within ten
working days after we receive such person’s written request. 

ITEM 16C. PRINCIPAL ACCOUNTANT FEES AND SERVICES

The following table sets forth the aggregate fees by categories specified below in connection with certain professional services rendered by Ernst & Young LLP
and Ernst & Young Hua Ming LLP, for the periods indicated below. 

Audit fees(1)
- Ernst & Young LLP
- Ernst & Young Hua Ming LLP
Audited-related fees(2)
Tax fees(3)
All other fees(4)

2015

2014

$

—    $
0.9 million    $

—   
—   
—   

19,000
0.6 million
—
—
—

(1) “Audit fees” means the aggregate fees billed in each of the fiscal years listed for professional services rendered by our principal auditors for the audit of our
annual financial statements included in our annual reports on Form 20-F or services that are normally provided by accountants in connection with statutory
and regulatory engagements for those fiscal years.

(2) “Audit-related fees” means the aggregate fees billed in each of the fiscal years listed for assurance and related services rendered by our principal auditors

that are reasonably related to the performance of the audit of our financial statements and are not reported under “Audit fees.”

(3) “Tax fees” means the aggregate fees billed in each of the fiscal years listed for professional services rendered by our principal auditors for tax compliance,

tax advice, and tax planning.

(4) “All other fees” means the aggregate fees billed in each of the fiscal years listed for products and services provided by our principal accountant, other than

the services reported in the other categories.

Before our independent auditors are engaged to render any services, the terms and fees of the engagement are reviewed by the audit committee before our audit
committee grants approval. All services as described above have been approved by our audit committee. 

ITEM 16D. EXEMPTIONS FROM THE LISTING STANDARDS FOR AUDIT COMMITTEES

None. 

ITEM 16E. PURCHASES OF EQUITY SECURITIES BY THE ISSUER AND AFFILIATED PURCHASERS

None. 

ITEM 16F. CHANGE IN REGISTRANT’S CERTIFYING ACCOUNTANT

None. 

ITEM 16G. CORPORATE GOVERNANCE

Our corporate governance practices do not differ in any significant way from those followed by domestic companies under the listing standards of the NASDAQ
Global Select Market. 

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ITEM 16H. MINE SAFETY DISCLOSURE

Not applicable. 

PART III 

ITEM 17.

FINANCIAL STATEMENTS

We have elected to provide financial statements pursuant to Item 18. 

ITEM 18.

FINANCIAL STATEMENTS

The consolidated financial statements of our company are included at the end of this annual report. 

ITEM 19. EXHIBITS

Exhibit Number
1.1

  Description of Document

Articles of Incorporation and By-laws, as amended on March 21, 2006 and July 14, 2011 (incorporated by reference to Exhibit 1.1 from 
our annual report on Form 20-F (file no. 001-32371) filed with the Securities and Exchange Commission on April 12, 2012)

4.1

4.2

4.3

4.4

4.5

4.6

4.7

Translation of a Lease between Sinovac Beijing and SinoBioway related to a building of approximately 28,000 square feet, dated 
August 12, 2004 (incorporated by reference to Exhibit 4.1 from our annual report on Form 20-F (file no. 001-32371) filed with the 
Securities and Exchange Commission on July 14, 2006)

Translation of a Lease between Sinovac Beijing and SinoBioway related to a building of approximately 13,300 square feet, dated 
August 12, 2004 (incorporated by reference to Exhibit 4.2 from our annual report on Form 20-F (file no. 001-32371) filed with the 
Securities and Exchange Commission on July 14, 2006)

Translation of a Supplement Agreement to the Leases between Sinovac Beijing and SinoBioway (incorporated by reference to Exhibit 
4.3 from our annual report on Form 20-F (file no. 001-32371) filed with the Securities and Exchange Commission on July 14, 2006)

Stock Option Plan adopted on November 1, 2003 (incorporated by reference to Exhibit 4.4 from our annual report on Form 20-F (file 
no. 001-32371) filed with the Securities and Exchange Commission on July 14, 2006)

Form of Employment Agreement between the Registrant and Weidong Yin, dated July 7, 2006 (incorporated by reference to Exhibit 4.5 
from our annual report on Form 20-F (file no. 001-32371) filed with the Securities and Exchange Commission on July 14, 2006)

Translation of Form of Employment Agreement between the Registrant or its subsidiary and any other senior executive officers of the 
Registrant or its subsidiary (incorporated by reference to Exhibit 4.6 from our annual report on Form 20-F (file no. 001-32371) filed 
with the Securities and Exchange Commission on July 14, 2006)

Form of Non-disclosure, Non-competition and Proprietary Information Agreement between the Registrant or its subsidiary and any 
other senior executive officers of the Registrant or its subsidiary (incorporated by reference to Exhibit 4.7 from our annual report on 
Form 20-F (file no. 001-32371) filed with the Securities and Exchange Commission on July 14, 2006)

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4.8

4.9

4.10

4.11

4.12

4.13

4.14

4.15

4.16

4.17

4.18

Translation of a Lease between Sinovac Beijing and SinoBioway related to buildings of approximately 37,000 square feet, dated June 4, 
2007 (incorporated by reference to Exhibit 4.8 from our annual report on Form 20-F (file no. 001-32371) filed with the Securities and 
Exchange Commission on March 31, 2008)

Share Purchase Agreement between Sinovac Biotech Ltd. and Sansar Capital Management LLC dated January 22, 2008 (incorporated 
by reference to Exhibit 4.9 from our annual report on Form 20-F (file no. 001-32371) filed with the Securities and Exchange 
Commission on March 31, 2008)

Exclusive Promotion Service Agreement between Sinovac Beijing and GlaxoSmithKline (China) Investment Co., Ltd., dated July 30, 
2007 (incorporated by reference to Exhibit 4.10 from our annual report on Form 20-F (file no. 001-32371) filed with the Securities and 
Exchange Commission on March 31, 2008)

Equity Joint Venture Contract dated November 22, 2009 between Sinovac Hong Kong and Dalian Jin Gang (English Translation) 
(incorporated by reference to Exhibit 99.1 from our current report on Form 6-K (file no. 001-32371) filed with the Securities and 
Exchange Commission on January 20, 2010)

Memorandum of Understanding dated November 22, 2009 between Sinovac Hong Kong and Dalian Jin Gang (English Translation) 
(incorporated by reference to Exhibit 99.2 from our current report on Form 6-K (file no. 001-32371) filed with the Securities and 
Exchange Commission on January 20, 2010)

Equity Interest Transfer Agreement dated December 17, 2009 between Sinovac Hong Kong and Dalian Jin Gang (English Translation) 
(incorporated by reference to Exhibit 99.3 from our current report on Form 6-K (file no. 001-32371) filed with the Securities and 
Exchange Commission on January 20, 2010)

Asset Acquisition Agreement dated February 10, 2010 between Sinovac Beijing and Beijing Xingchang High-tech Development Co., 
Ltd. (English Translation) (incorporated by reference to Exhibit 4.10 from our annual report on Form 20-F (file no. 001-32371) filed 
with the Securities and Exchange Commission on April 16, 2010)

2012 Share Incentive Plan adopted on August 22, 2012 (incorporated by reference to Exhibit 4.15 from our annual report on Form 20-F 
(file no. 001-32371) filed with the Securities and Exchange Commission on April 30, 2013)

Translation of a Supplemental Agreement, dated April 8, 2013, to a Lease Contract between Sinovac Beijing and SinoBioway, dated 
August 12, 2004 (incorporated by reference to Exhibit 4.16 from our annual report on Form 20-F (file no. 001-32371) filed with the 
Securities and Exchange Commission on April 30, 2013)

Translation of a Supplemental Agreement, dated April 8, 2013, to a Lease Contract between Sinovac Beijing and SinoBioway, dated 
June 4, 2007 (incorporated by reference to Exhibit 4.17 from our annual report on Form 20-F (file no. 001-32371) filed with the 
Securities and Exchange Commission on April 30, 2013)

Translation of a Supplemental Agreement, dated August 12, 2010, to a Lease Contract between Sinovac Beijing and SinoBioway, dated 
August 12, 2004 (incorporated by reference to Exhibit 4.18 from our annual report on Form 20-F (file no. 001-32371) filed with the 
Securities and Exchange Commission on April 30, 2013)

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4.19

4.20

8.1*

11.1

12.1*

12.2*

13.1**

13.2**

15.1*

Translation of a Supplemental Agreement, dated April 8, 2013, to a Lease Contract between Sinovac Beijing and SinoBioway, dated 
August 12, 2004, and the Supplemental Agreement between Sinovac Beijing, Sinovac R&D and SinoBioway, dated August 12, 2010 
(incorporated by reference to Exhibit 4.19 from our annual report on Form 20-F (file no. 001-32371) filed with the Securities and 
Exchange Commission on April 30, 2013)

Rights Agreement, dated March 28, 2016, between Sinovac Biotech Ltd. and Pacific Stock Transfer Company (incorporated by 
reference to Exhibit 4.1 of our Report on Form 6-K dated March 29, 2016) 

  List of Subsidiaries

Code of Business Conduct and Ethics (incorporated by reference to Exhibit 11.1 from our annual report on Form 20-F (file no. 001-
32371) filed with the Securities and Exchange Commission on July 14, 2006)

  CEO Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

  CFO Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

  CEO Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

  CFO Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

  Consent of Ernst & Young Hua Ming LLP

101.INS*

  XBRL Instance Document

101.SCH*

  XBRL Taxonomy Extension Scheme Document

101.CAL*

  XBRL Taxonomy Extension Calculation Linkbase Document

101.DEF*

  XBRL Taxonomy Extension Definition Linkbase Document

101.LAB*

  XBRL Taxonomy Extension Label Linkbase Document

101.PRE*

  XBRL Taxonomy Extension Presentation Linkbase Document

*    Filed with this annual report on Form 20-F 
** Furnished with this annual report on Form 20-F 

93

  
  
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The registrant hereby certifies that it meets all of the requirements for filing on Form 20-F and that it has duly caused and authorized the undersigned to sign this
annual report on its behalf. 

SIGNATURES 

Date: April 25, 2016

Sinovac Biotech Ltd.

By:

/s/ Weidong Yin
Name: Weidong Yin
Title: Chairman and Chief Executive Officer

94

  
  
  
  
  
 
 
 
 
 
 
 
SINOVAC BIOTECH LTD. 

CONSOLIDATED FINANCIAL STATEMENTS 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

December 31, 2015 and 2014 

F-1

  
   
  
  
  
 
Index 

Reports of Independent Registered Public Accounting Firm – Ernst & Young Hua Ming LLP

Consolidated Balance Sheets

Consolidated Statements of Comprehensive Income (Loss)

Consolidated Statements of Changes in Shareholders’ Equity

Consolidated Statements of Cash Flows

Notes to Consolidated Financial Statements

F-2

F-3

F-5

F-6

F-7

F-10

F-11

  
  
  
  
 
 
 
 
 
 
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM  

The Board of Directors and Shareholders of Sinovac Biotech Ltd. 

We have audited the accompanying consolidated balance sheets of Sinovac Biotech Ltd. (the “Company”) as of December 31, 2015 and 2014, and the related
consolidated  statements  of  comprehensive  income  (loss),  shareholders'  equity,  and  cash  flows  for  each  of  the  three  years  in  the  period  ended  December  31,
2015. These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements
based on our audits. 

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we
plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining,
on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable
basis for our opinion. 

In  our  opinion,  the  consolidated  financial  statements  referred to  above  present  fairly,  in  all  material  respects,  the  consolidated  financial  position  of  Sinovac
Biotech Ltd. at December 31, 2015 and 2014, and the consolidated results of its operations and its cash flows for each of the three years in the period ended
December 31, 2015, in conformity with U.S. generally accepted accounting principles. 

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), Sinovac Biotech Ltd.’s internal
control over financial reporting as of December 31, 2015, based on criteria established in Internal Control-Integrated Framework issued by the Committee of
Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated April 25, 2016 expressed an unqualified opinion thereon. 

/s/ Ernst & Young Hua Ming LLP 
Beijing, The People’s Republic of China 
April 25, 2016 

F-3

  
  
  
  
  
  
  
  
  
 
Report of Independent Registered Public Accounting Firm 

The Board of Directors and Shareholders of Sinovac Biotech Ltd. 

We have audited Sinovac Biotech Ltd.’s internal control over financial reporting as of December 31, 2015, based on criteria established in Internal Control-
Integrated  Framework  issued  by  the  Committee  of  Sponsoring  Organizations  of  the  Treadway  Commission  (2013  framework)  (the  COSO  criteria).  Sinovac
Biotech  Ltd.’s  management  is  responsible  for  maintaining  effective  internal  control  over  financial  reporting,  and  for  its  assessment  of  the  effectiveness  of
internal  control  over  financial  reporting  included  in  the  accompanying  Management’s  Annual  Report  on  Internal  Control  over  Financial  Reporting.  Our
responsibility is to express an opinion on the company’s internal control over financial reporting based on our audit. 

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we
plan  and  perform  the  audit  to  obtain  reasonable  assurance  about  whether  effective  internal  control  over  financial  reporting  was  maintained  in  all  material
respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing
and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered
necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion. 

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and
the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over
financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the
transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of
financial statements in accordance with generally accepted accounting principles, and that receipts and  expenditures of  the company are being made only in
accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of
unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements. 

Because  of  its  inherent  limitations,  internal  control  over  financial  reporting  may  not  prevent  or  detect  misstatements.  Also,  projections  of  any  evaluation  of
effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance
with the policies or procedures may deteriorate. 

In our opinion, Sinovac Biotech Ltd. maintained, in all material respects, effective internal control over financial reporting as of December 31, 2015, based on
the COSO criteria. 

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of
Sinovac Biotech Ltd. as of December 31, 2015 and 2014, and the related consolidated statements of comprehensive income (loss), shareholders’ equity, and
cash  flows  for  each  of  the  three  years  in  the  period  ended  December  31,  2015  of  Sinovac  Biotech  Ltd.,  and  our  report  dated  April  25,  2016  expressed  an
unqualified opinion thereon.  

/s/ Ernst & Young Hua Ming LLP 
Beijing, The People’s Republic of China 
April 25, 2016 

F-4

  
   
  
  
  
  
  
  
  
  
  
 
SINOVAC BIOTECH LTD.
Consolidated Balance Sheets
As of December 31, 2015 and 2014
(Expressed in thousands of U.S. dollars, except for number of shares and per share data)

December 31, 
2015

December 31, 
2014

ASSETS

Current assets

Cash and cash equivalents
Restricted cash (note 4)
Accounts receivable – net (notes 5 and 11)
Inventories (note 6)
Prepaid expenses and deposits (including prepaid expenses  
to related party of 2015 - $352, 2014 - $157) (note 12 (b))
Deferred tax assets (note 14)
Current assets held for sale (note 3)

Total current assets

Property, plant and equipment (notes 8 and 11)
Prepaid land lease payments (notes 9 and 11)
Long–term inventories (note 7)
Long–term prepaid expenses (including prepaid expenses to related party of 2015 - $25, 2014 - $3) (note 12
(b))
Prepayments for acquisition of equipment
Deferred tax assets (note 14)
Licenses (note 10)
Long-term assets held for sale (note 3)

Total assets

LIABILITIES AND EQUITY

Current liabilities

$

$

63,834
1,626
39,021
18,685

958
2,603
1,797   

128,524

63,940
9,574
-

25
328
593
-
-   

  $

202,984 

$

Short-term bank loans and current portion of long-term bank loans and other debt (note 11)
Loan from a non-controlling shareholder (note 12 (a))
Accounts payable and accrued liabilities (note 13)
Income tax payable
Deferred revenue (note 15)
Deferred government grants (note 16)
Current liabilities held for sale (note 3)

$

Total current liabilities

Deferred government grants (note 16)
Long-term bank loans and other debt (note 11)
Deferred revenue (note 15)
Other non-current liabilities (note 14)
Long-term liabilities held for sale (note 3)

Total long-term liabilities

Total liabilities

Commitments and contingencies (notes 17 and 24)

EQUITY

Preferred stock
Authorized 50,000,000 shares at par value of $0.001 each
Issued and outstanding: nil
Common stock (note 18)
Authorized: 100,000,000 shares at par value of $0.001 each
Issued and outstanding: 56,906,561 (2014 – 55,809,661)
Additional paid-in capital
Accumulated other comprehensive income
Statutory surplus reserves (note 20)
Accumulated deficit

Total shareholders' equity

Non-controlling interests (note 21)

$

21,775
2,470
22,524
1,643
8,144
1,202

243   

58,001

4,730
756
-
756
-
6,242

64,243

-

57

109,944
8,110
13,450
(8,281)  

123,280

15,461   

91,293
-
40,719
18,712

1,426
2,266
387 

154,803

66,233
10,261
2,648

3
1,387
515
352
2,328 
238,530

47,375
2,595
22,538
1,101
4,996
530
699 
79,834

7,494
1,803
7,191
454
28
16,970

96,804

-

56

108,243
12,022
12,627
(6,384)
126,564

15,162 

  
  
  
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total equity

Total liabilities and equity

138,741

$

202,984

$

141,726

238,530

The accompanying notes are an integral part of these consolidated financial statements. 

F-5

   
  
 
 
SINOVAC BIOTECH LTD.
Consolidated Statements of Comprehensive Income (Loss)
For the years ended December 31, 2015, 2014 and 2013
(Expressed in thousands of U.S. Dollars, except for number of shares and per share data)

Sales (note 23)

Cost of sales

Gross profit

$

Selling, general and administrative expenses (including rent expenses incurred to related party of 

2015 - $852,  2014 - $869, 2013 - $847) (note 12(b))

Provision (recovery) for doubtful accounts

Research and development expenses – (net of  

2015- $16, 2014 - $nil, 2013 $nil in government research grants)

Loss on disposal and impairment of property, plant and equipment (note 8)

Government grants recognized in income

Total operating expenses
Operating income

For the year ended December 31
2015   
67,414    $

2014
62,932

$

18,425     

48,989     

15,476

47,456

37,436     

34,166

(49)    

329

2013
71,774

20,505

51,269

33,611

(504)

9,490     

10,934

8,128

26     

(1,637)    

45,266     
3,723     

74

(104)  

45,399
2,057

88

- 

41,323
9,946

Interest and financing expenses – (Including interest expenses incurred to related party, 2015 - 

$183, 2014 - $221, 2013 - $237) (note 12(b))

(1,920)    

(3,407)

(3,031)

Interest income
Other income

Income from continuing operations before income taxes

Income tax benefit (expense) (note 14)

Income from continuing operations
Loss from discontinued operations, net of tax of nil (note 3)
Net income (loss)

Less: (income) attributable to non-controlling interests

1,155     
73     

2,684
1,312   

3,031     

2,646

(2,516)    

(1,458)  

515     
(728)    
(213)    

(861)    

1,188
(1,524)  
(336)

(515)  

2,167
329 

9,411

2,225 

11,636
(1,266)
10,370

(2,928)

Net income (loss) attributable to shareholders of Sinovac

$

(1,074)   $

(851) $

7,442

Income (loss) from continuing operations
Other comprehensive income (loss) from continuing operations, net of tax of nil
Foreign currency translation adjustments
Comprehensive income (loss) from continuing operations

Loss from discontinued operations
Other comprehensive income (loss) from discontinued operations, net of tax of nil
Foreign currency translation adjustments
Comprehensive (loss) from discontinued operations

$

Comprehensive income (loss)
Less: comprehensive (income) attributable to non-controlling interests
Comprehensive income (loss) attributable to shareholders of Sinovac

Earnings (loss) per share (note 22)

Basic net income (loss) per share:
Continuing operations
Discontinued operations
Basic net income (loss) per share

Diluted net income (loss) per share:
Continuing operations

515     

1,188

(4,137)    
(3,622)    

(2,344)  
(1,156)

(728)    

(1,524)

(338)    
(1,066)   $

(4,688)    
(298)    
(4,986)    

(83)
(1,607) $

(2,763)

(207)  

(2,970)

(0.01)    
(0.01)    
(0.02)    

0.01
(0.03)  
(0.02)  

11,636

2,589 
14,225

(1,266)

97
(1,169)

13,056
(3,244)
9,812

0.15
(0.02)
0.13 

(0.01)    

0.01

0.15

  
  
  
 
 
 
      
 
      
 
      
 
      
 
      
 
      
 
      
 
 
      
 
      
 
      
 
 
      
 
      
 
 
      
 
 
      
 
 
      
 
      
      
 
 
      
      
 
      
 
 
      
      
 
      
      
 
 
 
      
      
Discontinued operations
Diluted net income (loss) per share

Weighted average number of shares of common stock outstanding
– Basic
– Diluted

The accompanying notes are an integral part of these consolidated financial statements. 

(0.01)    
(0.02)    

(0.03)  
(0.02)  

(0.02)
0.13 

56,313,927     
56,313,927     

55,681,076
56,114,202

55,301,276
55,802,338

F-6

  
  
 
 
 
      
      
 
SINOVAC BIOTECH LTD. 
Consolidated Statements of Shareholders’ Equity 
For the years ended December 31, 2015, 2014 and 2013 
(Expressed in thousands of U.S. dollars, expect for number of shares data) 

Common stock
Shares   

Amount   

Additional
paid-in
capital   

Balance, December 31, 2012

    55,091,561    $

55

$ 106,246

Stock-based compensation (note 19)

Exercise of stock options (note 18)

Subscriptions received (note 18)

Other comprehensive income

- Other comprehensive income attributable to non-
controlling interests

- Other comprehensive income attributable to 
shareholders

Net income for the year
-Net income attributable to non-controlling interests
- Net income attributable to shareholders of Sinovac

-     

478,800     

-     

-     

-     

-     
-     

-

1

-

-

-

-
-   

281

848

18

-

-

-
-   

Accumulated
other
comprehensive
income (foreign
currency
translation
adjustment)   
11,771

$

Statutory
surplus
reserves    
11,808

$

Retained
earnings   

Total
(accumulated    shareholders’

Non-
controlling

deficit)   
(12,156)   $

equity   

117,724

$

interests   
11,711

$

Total
equity 
$ 129,435

-

-

-

-

2,370

-

-

-

-

-

-     

-     

-     

281

849

18

-

-

-

281

849

18

-     

-

316

316

-     

2,370

-

2,370

-
-   

-
-   

-     
7,442     

-
7,442   

2,928

-   

2,928
7,442 

Balance, December 31, 2013

    55,570,361    $

56    $ 107,393    $

14,141    $

11,808    $

(4,714)   $

128,684    $

14,955    $ 143,639 

The accompanying notes are an integral part of these consolidated financial statements. 

F-7

  
  
  
  
  
  
    
  
  
 
   
      
      
   
 
   
      
      
   
 
   
      
      
   
 
   
      
      
   
      
      
 
   
      
      
   
 
   
      
      
   
 
   
      
      
   
      
      
   
   
 
   
      
      
 
SINOVAC BIOTECH LTD. 
Consolidated Statements of Shareholders’ Equity 
For the years ended December 31, 2015, 2014 and 2013 
(Expressed in thousands of U.S. dollars, expect number of shares data) 

Common stock
Shares   

Amount   

Additional
paid-in
capital   

Balance, December 31, 2013

    55,570,361    $

56

$ 107,393

Stock-based compensation (note 19)

Exercise of stock options (note 18)

Subscriptions received (note 18)

Other comprehensive loss

- Other comprehensive loss attributable to non-
controlling interests

- Other comprehensive loss attributable to shareholders    

-     

239,300     

-     

-     

-     

-

-

-

-

-

287

512

51

-

-

Net loss for the year
-Net income attributable to non-controlling interests
- Net (loss) attributable to shareholders of Sinovac
- Transfer to statutory surplus reserves (note 20)
Balance, December 31, 2014

-     
-     
-     
    55,809,661     

-
-
-   
56   

-
-
-   
108,243   

Accumulated
other
comprehensive
income (foreign
currency
translation
adjustment)   
14,141

$

-

-

-

-

(2,119)

-
-
-   
12,022   

Statutory
surplus
reserves    
11,808

$

Total
Accumulated    shareholders’

Non-
controlling

deficit

equity   

$

(4,714)   $

128,684

$

interests   
14,955

Total
equity 
$ 143,639

-

-

-

-

-

-     

-     

-     

-     

-     

287

512

51

-

-

-

287

512

51

-

(308)

(308)

(2,119)

-

(2,119)

-
-
819   
12,627   

-     
(851)    
(819)    
(6,384)    

-
(851)

-   
126,564   

515
-
-   
15,162   

515
(851)
- 
141,726 

The accompanying notes are an integral part of these consolidated financial statements 

F-8

  
   
  
  
  
  
    
    
  
    
    
  
    
    
  
    
    
  
  
   
 
   
      
      
   
 
   
      
      
   
 
   
      
      
   
 
   
      
      
   
      
      
 
   
      
      
   
 
   
      
      
 
   
      
      
   
      
      
   
   
   
 
SINOVAC BIOTECH LTD. 
Consolidated Statements of Shareholders’ Equity 
For the years ended December 31, 2015, 2014 and 2013 
(Expressed in thousands of U.S. dollars, expect number of shares data) 

Common stock
Shares   

Amount   

Additional
paid-in
capital   

Balance, December 31, 2014

    55,809,661    $

56

$ 108,243

Stock-based compensation (note 19)

Exercise of stock options (note 18)

Subscriptions received (note 18)

-      

367,900     

-     

2015 restricted shares issued (note 18)

729,000     

Other comprehensive loss

- Other comprehensive loss attributable to non-
controlling interests

- Other comprehensive loss attributable to shareholders    

-     

-     

-

-

-

1

-

-

952

732

18

(1)

-

-

Accumulated
other
comprehensive
income (foreign
currency
translation
adjustment)   
12,022

$

-

-

-

-

-

(3,912)

Statutory
surplus
reserves    
12,627

$

Total
Accumulated    shareholders’

Non-
controlling

deficit

equity   

$

(6,384)   $

126,564

$

interests   
15,162

Total
equity 
$ 141,726

-

-

-

-

-

-

-     

-     

-     

 -     

-     

-     

952

732

18

-

-

-

-

-

-

952

732

18

-

(563)

(563)

(3,912)

-

(3,912)

Net loss for the year
-Net income attributable to non-controlling interests
- Net (loss) attributable to shareholders of Sinovac
- Transfer to statutory surplus reserves (note 20)
Balance, December 31, 2015

-     
-     
-     
    56,906,561     

-
-
-   
57   

-
-
-   
109,944   

-
-
-   
8,110   

-
-
823   
13,450   

-     
(1,074)    
(823)    
(8,281)    

-
(1,074)

-   
123,280   

862
-
-   
15,461   

862
(1,074)
- 
138,741 

The accompanying notes are an integral part of these consolidated financial statements 

F-9

  
  
  
  
  
  
    
    
  
    
    
  
    
    
  
    
    
  
  
   
 
   
      
      
   
 
   
      
      
   
 
   
      
      
   
 
   
      
      
   
 
   
      
      
   
      
      
 
   
      
      
   
 
   
      
      
 
   
      
      
   
      
      
   
   
   
 
SINOVAC BIOTECH LTD. 
Consolidated Statements of Cash Flows 
For the years ended December 31, 2015, 2014 and 2013 
(Expressed in thousands of U.S. dollars) 

Cash flows provided by (used in) operating activities
Income from continuing operations
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
- Deferred income taxes
- Stock-based compensation
- Inventory provision
- Provision (recovery) for doubtful accounts
- Loss on disposal and impairment of property, plant and equipment
- Depreciation of property, plant and equipment  and amortization of  licenses
- Amortization of prepaid land lease payments
- Government grants recognized in income
- Accretion expenses
Changes in:
- Accounts receivable
- Inventories
- Income tax payable
- Prepaid expenses and deposits
- Deferred revenue
- Accounts payable and accrued liabilities
- Other non-current liabilities
-Restricted cash

Net cash provided by (used in) operating activities from  continuing operations
Net cash used in operating activities from discontinued operations
Net cash provided by (used in) operating activities

Cash flows provided by (used in) financing activities
- Proceeds from bank loans
- Repayments of bank loans
- Proceeds from issuance of common stock, net of share issuance costs
- Proceeds from shares subscribed
- Government grants received
- Repayment of loan from a non-controlling shareholder
Net cash provided by (used in) financing activities from  continuing operations
Net cash provided by financing activities from discontinued operations
Net cash provided by (used in) financing activities

Cash flows used in investing activities
- Proceeds from disposal of equipment
- Acquisition of property, plant and equipment
- Proceeds from disposal of subsidiary
Net cash used in investing activities from continuing operations
Net cash used in investing activities from discontinued operations
Net cash used in investing activities

For the year ended December 31
2014

2015

2013

$

515    $

1,188

$

11,636

(518)    
952     
1,820     
(49)    
26     
6,249     
261     
(1,637)    
120     

41     
10     
576     
434     
(3,639)    
(434)    
333     
(1,677)    

3,383     
(722)    
2,661     

21,312     
(46,786)    
732     
18     
544     
(16)    
(24,196)    
-     
(24,196)    

81     
(5,299)    
801     
(4,417)    
(98)    
(4,515)    

(162)
287
1,026
329
74
7,829
267
(104)
114

(9,691)
(6,130)
899
(506)
601
(3,999)
454

-   

(7,524)
(1,123)
(8,647)

17,837
(15,962)
512
51
3,520
(649)
5,309
-
5,309

-
(10,913)
-
(10,913)
(90)
(11,003)

(2,225)
281
1,052
(504)
88
6,097
311
-
100

(7,256)
(7,157)
7
243
(675)
4,450
-
- 

6,448
(872)
5,576

16,800
(4,089)
814
18
842
-
14,385
34
14,419

-
(5,133)
-
(5,133)
(43)
(5,176)

Effect of exchange rate changes on cash and cash equivalents, including cash classified 
within current assets held for sale

(1,491)    

(1,383)

1,182

Increase (decrease) in cash and cash equivalents, including cash classified within current 
assets held for sale

(27,541)    

(15,724)

Less: Net increase (decrease) in cash classified within current assets assets for sale

(82)    

(500)

16,001

703

15,298
91,219

(27,459)    
91,293     

(15,224)
106,517

  $

$
  $

63,834    $

91,293    $

106,517 

1,722    $
2,058    $

3,152

$
491    $

2,853
- 

Increase (decrease) in cash and cash equivalents
Cash and cash equivalents, beginning of year

Cash and cash equivalents, end of year

Supplemental disclosure of cash flow information:

Cash paid for interest
Cash paid for income taxes

  
  
  
 
 
 
   
   
 
 
     
      
      
      
 
 
      
 
      
      
 
      
      
 
      
 
      
 
      
 
      
 
      
 
      
      
 
      
Supplemental schedule of non-cash activities: 

Acquisition of property, plant and equipment included in accounts payable and accrued 
liabilities

The accompanying notes are an integral part of these consolidated financial statements 

F-10

  $

2,220    $

2,050    $

2,015 

  
  
      
 
SINOVAC BIOTECH LTD.  
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated)  

1.

Basis of Presentation
These  consolidated  financial  statements  have  been  prepared  in  accordance  with  accounting  principles  generally  accepted  in  the  United  States  (“US
GAAP”). They include the accounts of Sinovac Biotech Ltd., which is incorporated under the laws of Antigua and Barbuda, and its wholly owned or
controlled  subsidiaries  (collectively,  the  “Company”).  All  significant  intercompany  transactions  have  been  eliminated.  Details  of  the  Company’s 
subsidiaries are as follows: 

Date of 
incorporation or 
establishment

Place of 
incorporation 
(or 
establishment) 
/operation

Percentage of
ownership as 
of December 
31, 2015

Percentage of 
ownership as of 
December 31, 2014

Name

Sinovac Biotech (Hong Kong) Ltd. 
(“Sinovac Hong Kong”)

Sinovac Biotech Co., Ltd. (“Sinovac 
Beijing”) (note 21)

October 2008 

Hong Kong

100%

April 2001 

People’s Republic of 
China (“PRC”)

73.09% 

Tangshan Yian Biological Engineering 
Co., Ltd. (“Tangshan Yian”)

February 1993 

Sinovac Biological Technology Co., 
Ltd. (“Sinovac R&D”) 

Sinovac (Dalian) Vaccine Technology 
Co., Ltd. (“Sinovac Dalian”) (note 21)

May 2009 

January 2010 

Sinovac Bitomed Co., Ltd.

April 2015

PRC 

PRC

PRC 

PRC

100% 

100%

55% 

100%

2.

Significant Accounting Policies

(a)

Use of Estimates

Principal activities

Investment holding company

  Research and development, 

production and sales of vaccine 
products

  Research and development, 

production and sales of vaccine 
products

  Research and development of 

vaccine products

  Research and development, 

production and sales of vaccine 
products

100% 

73.09% 

100% 

100% 

55% 

-

  Distribution of vaccine 

products

In preparation of the Company’s consolidated financial statements, management is required to make estimates and assumptions that affect the
reported  amounts  of  assets  and  liabilities,  the  disclosure  of  contingent  assets  and  liabilities  at  the  date  of  the  financial  statements,  and  the
reported  amounts  of  revenue  and  expenses  during  the  reporting  periods.  Significant  estimates  made  by  management  include:  provision  for
product returns, allowance for doubtful accounts, inventory provisions, useful lives of amortizable intangible assets, impairment of long-lived
assets,  fair  value  of  options  granted  and  related  forfeiture  rates,  and  realizability  of  deferred  tax  assets.  On  an  ongoing  basis,  management
reviews  its  estimates  to  ensure  that  these  estimates  appropriately  reflect  changes  in  the  Company’s  business  and  new  information  as  it
becomes available.  If  historical experience and  other factors used  by management to make  these  estimates do  not reasonably  reflect future
activity, the Company’s consolidated financial statements could be materially impacted. 

F-11

  
  
  
  
  
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
  
 
 
 
 
 
 
 
 
  
 
 
 
 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
  
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

(b)

Cash and Cash Equivalents

Cash  equivalents  consist  of  highly  liquid  investments  that  are  readily  convertible  to  cash  generally  with  maturities  of  three  months  or  less
when purchased. 

(c)

Restricted Cash

Restricted  cash  is  cash  held  as  collateral  for  transactions  the  Company  has  entered  into.  As  of  December  31,  2015,  the  balance  of  $1,626
represents  cash  collateral  held  as  a  guarantee  of  an  EPI  (Expanded  Programme  on  Immunization)  sales  contract  which  is  restricted  until
December 2016. 

(d)

Accounts Receivable

The  Company  extends  unsecured  credit  to  its  customers  in  the  ordinary  course  of  business  and  actively  pursues  past  due  accounts.  The
Company  estimates  an  allowance  for  doubtful  accounts  based  on  historical  experience,  the  age  of  the  accounts  receivable  balances,  credit
quality of the Company’s customers, current economic conditions and other factors that may affect its customers’ ability to pay. 

(e)

Inventories

Prior to January 1, 2015, inventories are stated at the lower of cost or replacement cost with respect to raw materials and the lower of cost or
market  with  respect  to  finished  goods  and  work  in  progress.  The  Financial  Accounting  Standards  Board  (“FASB”)  issued  Accounting
Standards  Update  (“ASU”)  No.  2015-11  (“ASU  2015-11”),  Simplifying  the  Measurement  of  Inventory,  which  the  Company  adopted  on
January 1, 2015. Subsequent to January 1, 2015, inventories are stated at the lower of cost or replacement cost with respect to raw materials
and the lower of cost or net realizable value with respect to finished goods and work in progress. The cost of work in progress and finished
goods  is  determined  on  a  weighted-average  cost  basis  and  includes  direct  material,  direct  labor  and  overhead  costs.  Net  realizable  value
represents the anticipated selling price, net of distribution cost, less estimated costs to completion for work in progress. 

(f)

Property, Plant and Equipment

Property, plant and equipment are recorded at cost. Significant additions and improvements are capitalized, while repairs and maintenance are
charged to expenses as incurred. Equipment purchased for specific research and development projects with no alternative uses are expensed.
Assets under construction are not depreciated until construction is completed and the assets are ready for their intended use. Gains and losses
from the disposal of property, plant and equipment are recorded in loss on disposal and impairment of property, plant and equipment included
in the consolidated statements of comprehensive income (loss). 

F-12

  
  
  
  
  
  
  
  
  
  
  
  
  
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

Depreciation of property, plant and equipment is computed using the straight-line method based on the estimated useful lives of the assets as
follows: 

Plant and buildings 
Machinery and equipment
Motor vehicles
Office equipment and furniture
Leasehold improvements

10 to 24 years
8 to 10 years
4 to 5 years
3 to 5 years
Lesser of useful lives and term of lease

(g)

Prepaid Land Lease Payments

Prepaid land lease payments represent amounts paid for the rights to use land in the PRC and is recorded at purchased cost less accumulated
amortization. Amortization is provided on a straight-line basis over the term of the lease agreement, which is 28 to 49 years. 

(h)

Licenses

The Company capitalizes the patent payment and the purchased cost of vaccines if the vaccine has received a new drug certificate from the
China Food and Drug Administration (“CFDA”) of China. If the vaccine has not received a new drug certificate, the purchase cost is expensed
as in-process research and development. 

Licenses in relation to the production and sales of pharmaceutical products are amortized on a straight-line basis over their respective useful
lives.  The  useful  lives  of  inactivated  hepatitis  A  and  recombinant  hepatitis  A&B  licenses  are  estimated  to  be  ten  years.  Before  August  15,
2012, the useful life for H5N1 licenses was estimated to be 20 years. Effective August 15, 2012, the remaining useful life was revised to three
years expiring on December 29, 2015 as a result of amendment to the agreement with the licensor (note 24(c)). The weighted average useful
lives of the acquired licenses are 9.16 years. Costs incurred  to renew or extend the term of licenses are capitalized and amortized over the
license’s useful life on a straight-line basis. 

(i)

Impairment of Long-Lived Assets

Long-lived  assets  including  intangible  assets  subject  to  amortization  are  reviewed  for  impairment  whenever  events  or  changes  in
circumstances indicate that the carrying value of an asset group may not be recoverable from the future undiscounted net cash flows expected
to  be  generated  by  the  asset  group.  An  asset  group  is  identified  as  assets  at  the  lowest  level  for  which  identifiable  cash  flows  are  largely
independent  of  the  cash  flows  of  other  assets.  If  the  asset  group  is  not  fully  recoverable,  an  impairment  loss  would  be  recognized  for  the
difference between the carrying value of the asset group and its estimated fair value, based on the discounted net future cash flows or other
appropriate methods, such as comparable market values. The Company uses estimates and judgments in its impairment tests and if different
estimates  or  judgment  had  been  utilized,  the  timing  or  the  amount  of  any  impairment  charges  could  be  materially  different.  The  Company
recorded impairment charges on long-lived assets for the year ended December 31, 2015 of $nil (2014 - $nil, 2013 - $57). 

(j)

Income Taxes

The  Company  follows  the  liability  method  of  accounting  for  income  taxes.  Under  this  method,  deferred  tax  liabilities  and  assets  are
determined based on the temporary differences between the carrying values and tax bases of assets and liabilities using enacted tax rates in
effect  in  the  years in  which  the  differences  are  expected  to  reverse. A valuation allowance  is  provided  if,  based  on  the  weight of  available
evidence, it is more-likely-than-not that some portion, or all, of the deferred tax assets will not be realized. Deferred tax assets and liabilities
are measured using enacted tax rates and laws. 

F-13

  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

The  tax  benefit  from  an  uncertain  tax  position  is  recognized  only  if  it  is  more  likely  than  not  that  the  tax  position  will  be  sustained  upon
examination by the appropriate taxing authority, based on the technical merits of the position. The tax benefits recognized from such a position
are measured based on the amount that is greater than 50% likely of being realized upon settlement. The Company recognizes a change in
available facts after the reporting date but before issuance of the financial statements in the period when the change in facts occur, even if that
new information provides a better estimate of the ultimate outcome of an uncertainty. Liabilities associated with uncertain tax positions are
classified as long−term unless expected to be paid within one year. Interest and penalties related to uncertain tax positions, if any, are recorded
in the provision for income taxes and classified with the related liability on the consolidated balance sheets. 

(k)

Value-added Taxes

Value-added taxes (“VAT”) collected from customers relating to product sales and remitted to governmental authorities are presented on a net
basis. VAT collected from customers is excluded from revenue. Prior to July 1, 2014, the Company was subject to a VAT rate of 6%. Starting
on July 1, 2014, the Company is subject to a VAT rate of 3%. 

(l)

Revenue Recognition

Revenue  is  recognized  when  persuasive  evidence  of  an  arrangement  exists,  the  price  is  fixed  and  determinable,  delivery  has  occurred  and
there is a reasonable assurance of collection of the sales proceeds. The Company generally obtains purchase authorizations from its customers
for a specified amount of products at a specified price and considers delivery to have occurred when the customer takes title of the products.
The Company provides certain customers with a right of return. 

Revenue for inactivated hepatitis A, combined inactivated hepatitis A&B and seasonal influenza vaccines are recognized when delivery has
occurred and the Company estimates return provision for these products. The product return provisions for inactivated hepatitis A vaccine and
combined inactivated hepatitis A&B vaccine are estimated based on historical return and exchange levels as well as the inventory levels and
the  remaining  shelf  lives  of  the  products  in  the  distribution  channels.  As  of  December  31,  2015,  the  sales  return  provision  for  inactivated
hepatitis  A  vaccine  and  combined  inactivated  hepatitis  A&B  vaccine  was  $5,900  (December  31,  2014  -  $3,553).  Private  pay  sales  return
provision of inactivated hepatitis A and combined inactivated hepatitis A&B as a percentage of sales was 13.6% and 8.6% in 2015 and 2014,
respectively. The Company does not accept returns for hepatitis products sold under the Expanded Program on Immunization and exports. As
such, no sales returns are estimated for these sales. The product return provision for seasonal influenza vaccines is estimated based on actual
sales returns and expected sales returns up to the end of the flu season because the Company generally accepts returns before the end of the flu
season. As of December 31, 2015, the sales return provision for seasonal influenza vaccine returns was approximately $1,462 (December 31,
2014 - $1,320). 

F-14

  
   
  
  
  
  
  
  
  
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

Revenue for animal and mumps vaccines without a right of return provided to customers is recognized when delivery has occurred. Revenue
for animal and mumps vaccines with a right of return provided to customers is recognized when payments are collected from customers as the
Company currently does not have sufficient historical data to estimate returns for these products. 

Deferred revenue is generally related to government stockpiling programs and advances received from customers. For government stockpiling
programs of H5N1 vaccines, the Company generally obtains purchase authorizations from the government for a specified amount of products
at a specified price and no rights of return are provided. Revenue is recognized when the government takes delivery of the products. If the
products expire prior to delivery, these expired products are recognized as revenue once cash is received and the products have expired and
passed government inspection. 

(m)

Shipping and Handling

Shipping and handling fees billed to customers are included in sales. Costs related to shipping and handling are recognized in selling, general
and administrative expenses in the consolidated statements of comprehensive income (loss). For the year ended December 31, 2015, $1,389 of
shipping and handling costs was included in selling, general and administrative expenses (2014 - $1,235, 2013 - $1,215). 

(n)

Advertising Expenses

Advertising costs are expensed as incurred and included in selling, general and administrative expenses. Advertising costs were $851 for the
year ended December 31, 2015 (2014 - $268, 2013 - $474). 

(o)

Research and Development

Research and development ("R&D") costs are expensed as incurred and are disclosed as a separate line item in the Company’s consolidated
statements of comprehensive  income (loss). R&D costs consist primarily of  the remuneration of R&D staff, depreciation, material, clinical
trial costs as well as amortization of acquired technology and know-how used in R&D with alternative future uses. R&D costs also include
costs associated with  collaborative  R&D  and  in-licensing arrangements, including  upfront  fees  paid  to  collaboration  partners in connection
with technologies which have not reached technological feasibility and did not have an alternative future use. Reimbursement of R&D costs
for arrangements with collaboration partners is recognized when the obligations are incurred. 

Under certain R&D arrangements with third parties, the Company may be required to make payments that are contingent on the achievement
of specific development, regulatory and/or commercial milestones. Before a product receives regulatory approval, license fees and milestone
payments made to third parties are expensed as incurred. License fees and milestone payments made to third parties after regulatory approval
is received are capitalized and amortized over the remaining life of the agreement with third parties. 

F-15

  
  
  
  
  
  
  
  
  
  
  
  
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

(p)

Government Grants

Government  grants  received  from  the  PRC  government  by  the  PRC  operating  subsidiaries  of  the  Company  are  recognized  when  there  is
reasonable assurance that the amount is receivable and all the conditions specified in the grant have been met. Government grants for R&D are
recognized as a reduction to R&D expenses when the expenses are incurred in the same period when the conditions attached to the grants are
met,  or  recognized  as  government  grants  recognized  in  income  in  the  period  when  the  conditions  are  met  after  the  expenses  are  incurred.
Government grants for property, plant and equipment are deferred and recognized as a reduction to the related depreciation and amortization
expenses in the same manner as the property, plant and equipment are depreciated. Interest subsidies are recorded as a reduction to interest and
financing  expenses  in  the  consolidated  statements  of  comprehensive  income  (loss),  or  recorded  as  a  reduction  to  interest  capitalized  if  the
subsidies  granted  are  related  to  a  specific  borrowing  associated  with  building  a  qualifying  asset.  For  government  loans  received  at  below
market interest rate, the difference  between the face  value  of  the  loan  and  fair  value  using  the effective  interest  rate  method  is recorded  as
deferred government grants. Accretion expense is recorded in interest and financing expense and the government grant will be recognized as
“government grants recognized in income” in the consolidated statement of comprehensive income (loss) when the government loan is fully
repaid. 

(q)

Retirement and Other Post-retirement Benefits

Full-time employees of the Company in the PRC participate in a government mandated defined contribution plan pursuant to which certain
pension  benefits,  medical  care,  unemployment  insurance,  employee  housing  fund  and  other  welfare  benefits  are  provided  to  employees.
Chinese labor regulations require that the Company makes contributions to the government for these benefits based on certain percentages of
the employees’ salaries. The Company has no legal obligation for the benefits beyond the contributions. The total amounts for such employee
benefits, which were expensed as incurred was $3,577 for the year ended December 31, 2015 (2014 - $3,338, 2013 - $3,083). 

(r)

Foreign Currency Translation and Transactions

The  Company  maintains  their  accounting  records  in  their  functional  currencies,  U.S.  dollars  (“US$”)  for  the  Company  and  Sinovac  Hong
Kong and Renminbi Yuan (“RMB”) for the PRC subsidiaries. The Company uses the US$ as its reporting currency. 

At the transaction date, each asset, liability, revenue and expense is re-measured into the functional currency by the use of the exchange rate in
effect at that date. At each period end, foreign currency monetary assets, and liabilities are re-measured into the functional currency by using
the  exchange  rate  in  effect  at  the  balance  sheet  date.  The  resulting  foreign  exchange  gains  and  losses  are  included  in  selling,  general  and
administrative expenses. The Company recognized foreign exchange gains (losses) of $(886) for the year ended December 31, 2015 (2014 -
$(619), 2013 - $650). 

F-16

  
  
  
  
  
  
  
  
  
  
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

The assets and liabilities of the PRC subsidiaries, Sinovac Beijing, Tangshan Yian, Sinovac R&D, Sinovac Dalian and Sinovac Bitomed are
translated into US$ at the exchange rates in effect at the balance sheet date. Revenue and expenses are translated at average exchange rates.
Gains and losses from such translations are recorded in accumulated other comprehensive income, a component of shareholders’ equity. 

Gains and losses on intra-entity foreign currency transactions that are of a long-term-investment nature was $560 for year ended December 31,
2015 (2014 - $294, 2013 - $235) which was recorded in accumulated other comprehensive income, a component of shareholders’ equity. 

(s)

Stock-based Compensation

Compensation  expense  for  costs  related  to  all  share-based  payments,  including  grants  of  stock  options,  is  recognized  through  a  fair-value
based  method.  The  Company  uses  the  Black-Scholes  option-pricing  model  to  determine  the  grant  date  fair  value  for  stock  options.  The
Company  uses the  grant date stock price to determine the  grant date fair  value of restricted shares. The Company  has elected  to  recognize
share-based compensation costs using the straight-line method over the requisite service period with a graded vesting schedule, provided that
the amount of compensation costs recognized at any date is at least equal to the portion of the grant date value of the awards that are vested at
that date. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from initial
estimates. Share based compensation costs are recorded net of estimated forfeitures such that expense is recorded only for those awards that
are expected to vest. 

(t)

Comprehensive Income (loss)

The Company’s comprehensive income (loss) consists of net income (loss) and foreign currency translation adjustments. 

(u)

Earnings (loss) Per Share

Earnings  (loss)  per  share  is  calculated  in  accordance  with  Accounting  Standards  Codification  (“ASC”)  260  Earnings  per  Share.  Basic
earnings  (loss)  per  share  is  computed  by  dividing  the  net  income  (loss)  attributable  to  shareholders  of  Sinovac  by  the  weighted  average
number of common shares outstanding during the year. Diluted earnings per share is computed in accordance with the treasury stock method
and based on the weighted average number of common shares and dilutive common share equivalents. Dilutive common share equivalents are
excluded from the computation of diluted earnings per share if their effects would be anti-dilutive. 

(v)

Operating Leases

Leases are classified as capital and operating depending on the terms and conditions of the lease agreement. Leases that transfer substantially
all the benefits and risks incidental to ownership of assets are accounted for as if there was an acquisition of an asset and incurrence of an
obligation at the inception of the lease. All other leases are accounted for as operating leases where rental payments are expensed as incurred.
There are no capital leases for the periods presented. 

F-17  

  
  
  
  
  
  
  
  
  
  
  
  
  
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

(w)

Fair Value Measurements

Assets and liabilities subject to fair value measurements are required to be disclosed within a specified fair value hierarchy. The fair value
hierarchy ranks the quality and reliability of inputs, or assumptions, used in the determination of fair value and requires assets and liabilities
carried at fair value to be classified and disclosed in one of the following categories based on the lowest level input used that is significant to a
particular fair value measurement: 







Level 1 — Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.

Level 2 — Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly.
Level 2 inputs include quoted prices for similar assets or liabilities in active markets, or quoted prices for identical or similar assets and
liabilities in markets that are not active.

Level 3 — Unobservable inputs for the asset or liability.

As of December 31, 2015 and 2014, the Company did not have any financial assets or liabilities measured at fair value on a recurring basis. 

The  carrying  values  of  cash  equivalents,  restricted  cash,  accounts  receivable,  accounts  payable  and  accrued  liabilities  and  short-term  bank
loans and the current portion of long-term debt approximate their fair value because of their short-term nature. The fair values of long-term
bank  loans  and  other  debt  are  estimated  based  on  the  discounted  value  of  future  contractual  cash  flows  which  approximates  their  carrying
value due to the fact they are predominately stated at variable rates based on the People’s Bank of China.  Fair value of the long-term bank
loans and other debt are determined based on level 2 inputs. 

The  Company  measures  property,  plant  and  equipment  at  fair  value  on  a  non-recurring  basis  only  if  an  impairment  charge  were  to  be
recognized. There were no non-recurring fair value measurements for the years ended December 31, 2015 and 2014. 

(x)

Concentration of Risks

Exchange Rate Risks 

The Company operates in China, which may give rise to significant foreign currency risks from fluctuations and the degree of volatility of
foreign exchange rates between the US$ and the RMB. In 2015, foreign exchange gains (losses) of $(886) is included in selling, general and
administrative expenses (2014- $(619), 2013 - $650). As at December 31, 2015, cash and cash equivalents of $46,923 (RMB 304 million) is
denominated in RMB and are held in PRC and Hong Kong (December 31, 2014 - $71,968 (RMB 447 million)). 

Currency Convertibility Risks 

Substantially  all  of  the  Company’s  operating  activities  are  transacted  in  RMB,  which  is  not  freely  convertible  into  foreign  currencies.  All
foreign  exchange  transactions  take  place  either  through  the  People’s  Bank  of  China  or  other  banks  authorized  to  buy  and  sell  foreign
currencies at the exchange rates quoted by the People’s Bank of China. Approval of foreign currency payments by the People’s Bank of China
or other regulatory  institutions  requires submitting a payment application form  together  with  other information  such as suppliers’ invoices,
shipping documents and signed contracts. 

F-18  

  
  
  
  
  
  
  
   
  
  
  
  
  
  
  
  
 
 
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

Concentration of Credit Risks 

Financial  instruments  that  potentially  subject  the  Company  to  concentration  of  credit  risks  consist  primarily  of  cash  and  cash  equivalents,
restricted cash and accounts receivable, the balances of which are stated on the consolidated balance sheets which represent the Company’s
maximum exposure. The Company places its cash and cash equivalents and restricted cash in good credit quality financial institutions in Hong
Kong and China. Concentration of credit risks with respect to accounts receivables is linked to the concentration of revenue. The Company’s
customers  are  mainly  various  government  agencies  in  China.  For  the  year  ended  December  31,  2015,  one  of  the  Company’s  customers
accounted  for  14%  of  the  Company’s  total  revenue.  No  single  customer  accounted  for  more  than  10%  of  total  sales  for  the  years  ended
December 31, 2014 and 2013 except for government stockpile purchases revenue recognized in 2013. To manage credit risk, the Company
performs ongoing credit evaluations of customers’ financial condition. 

Interest Rate Risks 

The Company is subject to interest rate risk. Other than a loan with carrying value of $1,861 and loan from a non-controlling shareholder of
$2,470  with  fixed  interest  rates  as  at  December  31,  2015,  other  interest-bearing  loans  are  charged  interest  at  variable  rates  based  on  the
People’s Bank of China (note 11). 

(y)

Recently Issued Accounting Standards

In May 2014, the FASB issued ASU No. 2014-09 (“ASU 2014-09”), Revenue from Contracts with Customers (Topic 606), where a single,
global revenue recognition model applies to most contracts with customers. Revenue will be recognized in a manner that depicts the transfer
of  goods  or  services  to  customers  in  an  amount  that  reflects  the  consideration  to  which  an  entity  expects  to  be  entitled,  subject  to  certain
limitations.  In  August  2015,  the  FASB  issued  ASU  2015-14,  where  the  effective  date  of  ASU  2014-09  was  extended  to  annual  periods
beginning after December 15, 2018. The Company is currently evaluating the impact on its consolidated financial statements of adopting this
standard. 

In  August  2014,  the  FASB  issued  ASU  No.  2014-15  (“ASU  2014-15”),  Going  Concern.  Management  of  the  Company  will  be  required  to
evaluate  whether  there  is  substantial  doubt  about  the  Company’s  ability  to  continue  as  a  going  concern  and,  if  so,  disclose  that  fact.
Management will also be required to evaluate and disclose whether its plans alleviate that doubt. The guidance is effective for annual periods
beginning after December 15, 2016. Early adoption is permitted. The Company will adopt ASU 2014-15 on January 1, 2017, and does not
expect the adoption of this standard will have a material impact on its consolidated financial statements. 

In April 2015, the FASB issued ASU No. 2015-03, Interest—Imputation of Interest (Subtopic 835-30) (“ASU 2015-03”). The guidance would
require  that  debt  issuance  costs  related  to  a  recognized  debt  liability  to  be  presented  in  the  balance  sheet  as  a  direct  deduction  from  the
carrying  amount  of  debt  liability,  consistent  with  debt  discounts  or  premiums,  rather  than  an  asset.  ASU  2015-03  is  effective  for  annual
reporting periods beginning after December 15, 2015, including interim periods within that reporting period. Early adoption is permitted. The
Company is currently evaluating the impact, if any, of the adoption of ASU 2015-03 on its consolidated financial statements. 

F-19  

  
  
  
  
  
  
   
  
  
  
   
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

In November 2015, the FASB issued ASU No. 2015-17 (“ASU 2015-17”), Income Taxes. To simplify the presentation of deferred income
taxes, ASU 2015-17 requires that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position,
applicable to all entities that present a classified statement of financial position. The guidance is effective for annual periods beginning after
December 15, 2016. Early adoption is permitted. While the Company is still assessing the impact on its consolidated financial statements of
adopting  this  standard,  it  does  not  believe  that  the  adoption  of  this  guidance  will  have  a  material  impact  on  its  consolidated  financial
statements. 

In January 2016, the FASB issued ASU No. 2016-01 (“ASU 2016-01”), Financial Instruments. ASU 2016-01 requires separate presentation of
financial  assets  and  financial  liabilities  by  measurement  category  and  form  of  financial  asset  on  the  balance  sheet  or  in  the  accompanying
notes to the financial statements. That presentation provides financial statement users with more decision-useful information about an entity’s
involvement  in  financial  instruments.  The  guidance  is  effective  for  annual  periods  beginning  after  December  15,  2017.  Early  adoption  is
permitted. The Company is currently evaluating the impact on its consolidated financial statements of adopting this standard. 

In February 2016, the FASB issued ASU No. 2016-02 (“ASU 2016-02”), Leases. ASU 2016-02 requires recognition of lease assets and lease
liabilities by lessees for those leases classified as operating leases. The guidance is effective for annual periods beginning after December 15,
2018. Early adoption is permitted. The Company is currently evaluating the impact on its consolidated financial statements of adopting this
standard. 

In  March  2016,  the  FASB  issued  ASU  No.  2016-09  (“ASU  2016-09”),  Compensation  –  Stock  Compensation.  Under  ASU  2016-09,  the
Company can make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for
forfeitures when they occur. The guidance is effective for annual periods beginning after December 15, 2016. Early adoption is permitted. The
Company is currently evaluating the impact on its consolidated financial statements of adopting this standard. 

3.

Discontinued Operations

In December 2015, the Company committed to a plan to sell 100% of their equity stake in Tangshan Yian Biological Engineering Co., Ltd. (“Tangshan
Yian”) to an unrelated third-party biological technology company, for a total consideration of $2,069 (RMB 13 million). As of December 31, 2015, the
Company received $776 (RMB 5.03 million) and the closing of the sale was subject to the fulfillment of several conditions. For disposal transactions
that occur on or after January 1, 2015, a component of the Company is reported in discontinued operations after meeting the criteria for held-for-sale
classification if the disposition represents a strategic shift that has (or will have) a major effect on the Company’s operations and financial results. The
Company analyzed the quantitative and qualitative factors relevant to Tangshan Yian disposition transaction and determined the criteria for held-for-
sale classification have been met, and the transaction represents a strategic shift where the Company is exiting the animal vaccine market and will focus
on  the  human  use  vaccine  market,  which  will  have  a  major  effect  on  the  Company’s  operations  and  financial  results  going  forward.  As  such,  the
financial  results  of  Tangshan  Yian  are  reported  within  discontinued  operations  in  the  consolidated  financial  statements.  The  consolidated  financial
statements  and  amounts  previously  reported  have  been  reclassified,  as  necessary,  to  conform  to  this  presentation  in  accordance  with  ASC  205,
Presentation of Financial Statements to allow for meaningful comparison of continuing operations. 

F-20  

  
  
  
  
  
  
  
  
  
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

Results of the discontinued operations are summarized as follows: 

Sales
Cost of sales
Gross loss
Selling, general and administrative expenses
Research and development expenses
Total operating expenses
Operating (loss)
Other income (expense)
(Loss) before income taxes
Income tax benefit (expense)
(Loss) from discontinued operations, net of income tax

2015   

For the year ended December 31,
2013 

2014   

112    $
406     
(294)    
459     
22     
481     
(775)    
47     
(728)    
-     
(728)   $

$

169
1,017   
(848)
621
100
721
(1,569)
45   
(1,524)
-
(1,524) $

750
768 
(18)
927
256
1,183
(1,201)
(65)
(1,266)
-
(1,266)

$

$

The following table summarizes the carrying amounts of the major classes of assets and liabilities held for sale in the consolidated balance sheets as of
December 31, 2015 and 2014, respectively:

Cash and cash equivalents
Prepaid land lease payments
Property, plant and equipment
Other assets held for sale
Total assets held for sale

Accounts payable and accrued liabilities
Other liabilities held for sale
Total liabilities held for sale

December 31,   
2015   
143    $
128     
1,450     
76     
1,797     

December 31,
2014
225
144
2,184
162 
2,715

217     
26     
243    $

699
28
727

$

$

F-21  

  
  
  
  
   
  
  
 
 
 
 
    
 
 
 
 
 
      
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

In February 2016, the Company completed the disposal of Tangshan Yian (note 25). 

4.

Restricted Cash

As of December 31, 2015, the balance of $1,626 (December 31, 2014 - nil) represents cash collateral for guarantee of an EPI sales contract, which is
restricted until December 2016. 

Restricted Cash

5.

Accounts Receivable – net

Trade receivables (note 11)
Allowance for doubtful accounts

Other receivables
Total accounts receivable

December 31,    December 31,
2014 
- 

2015   
1,626    $

  $

December 31,   
2015   
40,733    $
(2,415)    
38,318     
703     
39,021    $

December 31,
2014
42,423
(2,571)
39,852
867
40,719 

$

  $

Accounts receivables with a carrying value of $5,403 (RMB 35 million) were pledged as collateral for a bank loan from China Merchant Bank as of
December 31, 2015 (note 11). 

Accounts receivables with a carrying value of $5,641 (RMB 35 million) were pledged as collateral for a bank loan from Industrial and Commercial
Bank of China as of December 31, 2014 (note 11). 

The allowance for doubtful accounts reflects the Company’s best estimate of probable losses inherent in the accounts receivable balance. The Company
estimates  the  allowance  based  on  known  troubled  accounts,  historical  experience,  the  age  of  the  accounts  receivable  balances,  credit  quality  of  the
Company’s customers, current economic conditions, and other factors that may affect customers’ ability to pay. The Company records its allowance for
doubtful accounts based upon its assessment of various factors. As of December 31, 2015, the Company provided 100% (December 31, 2014 -100%)
allowance for accounts receivable aged more than four years, approximately 71.3% (December 31, 2014 - 100%) allowance for accounts receivable
aged  between  three  years  and  four  years,  approximately  38.6%  (December  31,  2014  -  56.3%)  allowance  for  accounts  receivable  aged  between  two
years and three years, approximately 13.6% (December 31, 2014 - 18.5%) allowance for accounts receivable aged between one year and two years, and
approximately 1.4% (December 31, 2014 - 1.8%) allowance for accounts receivable aged less than one year. 

For the year ended December 31, 2015, the Company changed its estimates of the allowance for doubtful accounts due to an improved historical trend 
of collecting accounts aged three years or more. The change in estimate resulted in an increase to income from continuing operations and net income 
attributable to shareholders of Sinovac of $375 and $274, respectively. In addition, basic and diluted earnings per share increased by $0.00 and $0.00, 
respectively. 

F-22  

  
  
  
  
  
  
  
  
  
  
  
  
  
 
 
 
 
 
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

The Company’s maximum exposure to credit risk at the balance sheets date relating to trade receivables is summarized as follows: 

Aging within one year, net of allowance for doubtful accounts

Aging greater than one year, net of allowance for doubtful accounts
Total trade receivables

6.

Inventories

Raw materials
Work in progress
Finished goods
Inventories

December 31,   
2015   
34,495    $

December 31,
2014
35,130

3,823     
38,318    $

4,722 
39,852

$

$

December 31,    December 31,
2014 
2,603
4,056
12,053 
18,712 

2015   
2,450    $
3,636     
12,599     
18,685    $

$

  $

For the year ended December 31, 2015, the Company charged $2,154 of excessive fixed production overhead to cost of sales (2014 - $1,764, 2013 -
$1,790). 

For the year ended December 31, 2015, the cost of sales includes $1,820 of inventory provision for products that are likely to expire before being sold
(2014 - $1,026, 2013 - $1,052). 

7.

Long-term Inventories

Work in progress
Finished goods
Long-term Inventories

December 31,   
2015   

-    $
-     
-    $

December 31,
2014 
-
2,648
2,648 

$

  $

Long-term inventories represent H5N1 vaccines with remaining shelf lives over one year and not expected to be sold within one year. These vaccines
are for government stockpiling purposes. 

F-23  

  
  
  
  
   
  
  
  
  
  
  
  
 
 
      
 
 
 
 
 
 
 
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

8.

Property, Plant and Equipment

Cost
Construction in progress
Plant and buildings
Machinery and equipment
Motor vehicles
Equipment and furniture
Leasehold improvements
Total cost

Less: Accumulated depreciation
Construction in progress
Plant and buildings
Machinery and equipment
Motor vehicles
Equipment and furniture
Leasehold improvements
Total accumulated depreciation

Property, plant and equipment, net

December 31,
2015

December 31,
2014

$

$

$

$

$

13,256
30,852
39,700
1,570
2,566
12,911   
100,855

-
8,059
20,458
1,408
1,830
5,160   
36,915

63,940

$

$

$

$

$

8,206
32,211
40,596
1,747
2,542
13,232 
98,534

-
6,957
17,876
1,567
1,707
4,194 
32,301

66,233

The buildings of the Changping facilities of Sinovac Beijing with a net book value of $13,505 (RMB 87.5 million) were pledged as collateral for a
bank loan from China Construction Bank (note 11). 

The buildings of Sinovac Beijing with a net book value of $2,568 (RMB 16.6 million) were pledged as collateral for a bank loan from Bank of Beijing
(note 11). 

The buildings of Sinovac Dalian with a net book value of $5,344 (RMB 34.6 million) were pledged as collateral for a bank loan from Bank of China
(note 11). 

Depreciation expense for the year ended December 31, 2015 was $5,897 (2014 - $7,458, 2013 - $5,662). 

Loss on disposal of equipment for the year ended December 31, 2015 was $26 (2014 - $74, 2013 - $31). 

9.

Prepaid Land Lease Payments

Prepaid land lease payments
Less: accumulated amortization
Net carrying value

December 31, 

2015   

December 31,
2014 

$

  $

11,147  $
1,573 
9,574    $

11,638
1,377
10,261 

F-24  

  
  
  
  
  
  
  
  
  
  
  
  
 
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
  
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

The prepaid land lease payments of the Changping facilities of Sinovac Beijing with a net book value of $2,724 (RMB17.6 million) were pledged as
collateral (note 11) for a bank loan from China Construction Bank. 

The prepaid land lease payments of Sinovac Beijing with a net book value of $327 (RMB2.1 million) were pledged as collateral (note 11) for a bank
loan from Bank of Beijing. 

The prepaid land lease payments of Sinovac Dalian with a net book value of $3,548 (RMB23.0 million) were pledged as collateral (note 11) for a bank
loan from Bank of China. 

Amortization expense for prepaid land lease payments for the year ended December 31, 2015 was $261 (2014 - $267, 2013 - $311). 

10.

Licenses

Inactivated hepatitis A
Combined inactivated hepatitis A&B
H5N1 licenses (note 24(c))

Total

Inactivated hepatitis A
Combined inactivated hepatitis A&B
H5N1 licenses (note 24(c))
Total

$

  $

$

  $

$

December 31, 2015
Accumulated
amortization
3,261
470
1,419   
5,150    $

$

Cost
3,261
470
1,419     
5,150    $

December 31, 2014
Accumulated
amortization   

$

3,405
490
1,130
5,025    $

$

Cost   
3,405
490
1,482
5,377    $

Net book
value
-
-
- 
- 

Net book
value 
-
-
352
352 

On August 15, 2011, the Company entered into a non-exclusive main license agreement together with three sublicense agreements with Medimmune,
LLC  (“Medimmune”)  to  use  patented  reverse  genetics  technology  pertaining  to  virus  strain  production  for  vaccines,  including  the  H5N1  influenza
virus strain. The Company amortized the patent fee on a straight-line method basis over the estimated useful life of 20 years. On August 15, 2012, the
Company  entered  into  amendment  agreements  with  Medimmune  which  amended  the  term  of  the  license  agreements.  As  for  the  main  license
agreement, the estimated useful life of the patent was revised to end on December 29, 2015. Accordingly, the estimated useful life of the patent was
revised to end on December 29, 2015 (note 24(c)) which is the termination date of the main license agreement, hence the H5N1 licenses fee was fully
amortized as of December 31, 2015. 

F-25  

  
  
  
  
  
  
  
  
  
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

Amortization expense for the licenses was $352 for the year ended December 31, 2015 (2014 - $371, 2013 - $435). 

11.

Bank Loans and Other Debt

Summarized below are bank loans and other debt as of December 31, 2015 and 2014: 

China Merchants Bank (a)
Bank of Beijing (b)
Bank of China (c)
China Merchants Bank (d)
Industrial and Commercial Bank of China (d)
China Construction Bank (e)

Bank loans due within one year

China Construction Bank (f)
China Construction Bank (g)
Bank of Beijing (h)
Beijing Zhongguancun Development Group (i)

Current portion of long-term bank loans and other debt

 Bank of Beijing (h)
 Beijing Zhongguancun Development Group (i)

Long-term bank loans and other debt

Total  bank loans and other debt

$

December 31,

2015

2014

$

4,631
2,933
1,544
3,087
-

7,719   

19,914

-
-
-

1,861   

1,861

756

-   

756

4,835
8,059
1,612
-
3,223
- 

17,729

13,861
4,044
11,741
- 

29,646

-
1,803 

1,803

$

22,531

$

49,178

(a) In 2014, Sinovac Beijing entered into a bank loan with China Merchants Bank in the aggregate principal amount of $4,835 (RMB 30 million) to
finance its working capital requirements, bearing interest at 15% above the prime rate of a one-year term loan published by the People’s Bank of China,
at 6.9% per year. Interest was payable quarterly. The loan was drawn on March 3, 2014 and was repaid on March 2, 2015. 

In 2015 Sinovac Beijing entered into a new bank loan with China Merchants Bank in the aggregate principal amount of $4,631 (RMB 30 million) to
finance its working capital requirements bearing interest at 15% above the prime rate of a one-year term loan published by the People’s Bank of China,
at 5.58% per year. Interest is payable quarterly. The loan was drawn on June 30, 2015 and is repayable on June 28, 2016. 

F-26  

  
   
  
  
  
  
  
  
  
 
 
 
 
 
 
 
 
 
 
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

(b) In 2014, Sinovac Beijing entered into a bank loan with Bank of Beijing in the aggregate principal amount of $8,059 (RMB 50 million) to finance its
working capital requirements. The loan’s annual interest rate was 6% and was payable quarterly. The loan was drawn on August 28, 2014 and was
repaid in full on August 28, 2015. 

On September 18, 2015, Sinovac Beijing entered into a bank loan with Bank of Beijing in the aggregate principal amount of $7,719 (RMB 50 million)
to finance its working capital requirements. The loan bears interest at 4.35% and is payable quarterly. The first $1,467 (RMB 9.5 million) was drawn
on October 28, 2015 and is repayable on October 27, 2016. The second $1,466 (RMB 9.5 million) was drawn on November 30, 2015 and is repayable
on November 29, 2016. 

(c) On December 17, 2012, Sinovac Dalian entered into a bank loan agreement with Bank of China with a credit line of $3,223 (RMB 20 million). The
loan’s annual interest rate was 7.44%. The first $806 (RMB 5 million) was drawn down on March 13, 2013 and repaid on March 12, 2014. The second
$806 (RMB 5 million) was drawn down on September 24, 2013 and repaid on September 23, 2014. The third $806 (RMB 5 million) was drawn down
on March 31, 2014 and was repaid on March 26, 2015. The fourth $806 (RMB 5 million) was drawn down on September 23, 2014 and was repaid in
full on September 22, 2015. 

On March 17, 2015, Sinovac Dalian entered into a bank loan with Bank of China in the aggregate principal amount of $772 (RMB 5 million) to finance
its working capital requirements. The loan bears interest at 30% above the prime rate of a one-year term loan published by the People’s Bank of China,
at 6.955%, the interest is paid monthly, and the loan will be repaid on March 16, 2016. On October 26, 2015, Sinovac Dalian entered into a bank loan
with Bank of China in the aggregate principal amount of $772 (RMB 5 million) to finance its working capital requirements. The loan bears interest at
166 base points above the prime rate of a one-year term loan published by the People’s Bank of China, at 6.01%, interest is paid monthly and the loan
is repayable on October 26, 2016. Prepaid land lease payments and buildings of Sinovac Dalian with a net book value of $8,892 (RMB 57.6 million)
were pledged as collateral. 

(d)  In  2014,  Sinovac  Beijing  entered  into  a  bank  loan  with  Industrial  and  Commercial  Bank  of  China  in  the  aggregate  principal  amount  of  $3,223
(RMB 20 million) to finance its working capital requirements, bearing interest at 10% above the prime rate of a one-year term loan published by the
People’s Bank of China at 7.5% per year. Interest was payable monthly. The loan was drawn on June 19, 2014, and guaranteed by an unrelated third
party, with a guarantee fee of $64 (RMB 0.4 million) over the term of the loan. Trade receivables of Sinovac Beijing with a carrying value of not lower
than $5,641 (RMB 35 million) were pledged as collateral. The loan was fully repaid on June 30, 2015. 

On  November  5,  2015,  Sinovac  Beijing  entered  into  a  one-year  term  bank  loan  with  China  Merchants  Bank  in  the  aggregate  principal  amount  of
$3,087 (RMB 20 million) to finance its working capital requirements, bearing interest at 5% above the prime rate of a one-year term loan published by
the People’s Bank of China, at 4.57% per year. Interest is payable quarterly. The loan is guaranteed by an unrelated third party, with a guarantee fee of
$62  (RMB  0.4  million)  over  the  term  of  the  loan.  Trade  receivables  of  Sinovac  Beijing  with  a  carrying  value  of  not  lower  than  $5,403  (RMB  35
million) were pledged as collateral. 

F-27  

  
  
  
  
  
  
  
  
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

(e) On June 4, 2015, Sinovac Beijing entered into a bank loan with China Construction Bank in the aggregate principal amount of $7,719 (RMB50
million)  to  finance  its  working  capital  requirements,  bearing  interest  at  5%  above  the  prime  rate  of  a  one-year  term  loan  published by  the  People’s
Bank of China and the interest rate of current year is 5.36%. Interest is payable monthly. The loan was drawn by three installments on June 4, 2015,
June 29, 2015, and August 7, 2015, and is repayable on June 3, 2016. Pursuant to the covenants set out in the agreement, the debt to total assets ratio
must not be higher than 80%, the current ratio must not be lower than 0.8, contingent liabilities must not be higher than $24,830 (RMB 161 million)
and  contingent  liabilities  as  a  percentage  of  total  shareholders’  equity  must  not  be  higher  than  50%.  The  Company  is  in  compliance  with  such
covenants as of December 31, 2015.Prepaid land lease payment and buildings of the Changping facilities of Sinovac Beijing with a net book value of
$16,229 (RMB 105.1 million) were pledged as collateral. 

(f) The loan from China Construction Bank in the aggregate principal amount of $13,894 (RMB 90 million) was exclusively for the purchase of the
Changping facility, bearing interest at the bank’s prime lending rate and adjusted every 12 months, at 6.4% per year. Interest was payable monthly.
Prepaid land lease payment and buildings of the Changping facilities of Sinovac Beijing with a net book value of $17,798 (RMB 110 million) were
pledged  as  collateral.  $322  (RMB  2  million)  was  repaid  in  2013,  $322  (RMB  2  million)  was  repaid  in  2014,  and  the  remaining  $13,861  (RMB  86
million) was fully repaid in 2015. 

(g) The total amount of the loan facility from China Construction Bank was $8,059 (RMB 50 million) for a three-year period from December 13, 2012
to December 12, 2015. The amount drawn was $4,996 (RMB 31 million) as at December 31, 2014. Interest was set at the bank’s prime lending rate at
6.15% per year. The loan was to be used exclusively for the operation and production costs of Sinovac Beijing. Interest was payable monthly. The loan
was  unsecured.  10%  of  the  principal  amount  was  repayable  in  2013  and  10%  of  the  principal  amount  was  repayable  in  2014  with  the  remaining
principal repayable in 2015. $458 (RMB 3 million) was repaid in 2013 and $494 (RMB 3 million) was repaid in 2014, and the remaining $3,874 (RMB
25 million) was fully repaid in 2015. 

(h) The loan from Bank of Beijing in the aggregate principal amount of $23,531 (RMB 146 million) with a term from May 2011 to November 2015
was for construction of the Changping facility and had a maximum credit facility amount of $32,234 (RMB 200 million). The interest was charged at
the bank’s prime lending rate and adjusted every 12 months, at 6.4% per year, and was payable quarterly. The loan was repayable in four installments
on May 13, 2014, November 13, 2014, May 13, 2015 and November 13, 2015. $11,790 (RMB 72.6 million) was repaid in 2014 and $11,741 (RMB
72.9 million) was repaid in 2015. Prepaid land lease payments and buildings of Sinovac Beijing with a net book value of $3,285 (RMB 20.4 million)
were pledged as collateral as of December 31, 2014. 

F-28  

  
  
  
  
  
  
  
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

On May 20, 2015, Sinovac Beijing entered into a new bank loan with Bank of Beijing in the aggregate principal amount of $7,410 (RMB 48 million)
with a term from July 2015 to July 2020 for construction of the pneumococcal polysaccharide vaccine facilities. The loan bears interest at the bank’s
prime lending rate, at 5.25% per year. Interest is payable quarterly. The loan is repayable in four equal installments in January 2019, July 2019, January
2020 and July 2020. $756 (RMB 4.9 million) was drawn in July 2015. Prepaid land lease payments and buildings of Sinovac Beijing with a net book
value of $2,896 (RMB 18.8 million) were pledged as collateral as of December 31, 2015. 

(i) The Loan from Beijing Zhongguancun Development Group in the aggregate principal amount of $1,934 (RMB 12 million) bearing interest currently
at 0.36% per year is for the purpose of funding the EV71 vaccine research project of Sinovac Beijing. The total loan is $1,934 (RMB 12 million) of
which $967 (RMB 6 million) was received in 2012 and the second $967 (RMB 6 million) was received in 2013. The loan is unsecured and repayable
on February 24, 2016. Beijing Zhongguancun Development Group is entitled to 10.62% ownership of the profits, if any, generated from the intellectual
property  developed  during  the  loan  period.  No  profit-sharing  payments  are  required  to  be  made  as  no  profits  have  been  generated  to  date.  The
Company can repay the loan at any time during the loan period. The fair value differential of $358 (between the face value and the fair value using the
effective interest rate method at the Company's borrowing rate of 6.9%) is recorded as a current deferred government grant as of December 31, 2015
(2014- $376) (see note 16). The loan was repaid in full on February 22, 2016. 

Aggregate annual principal payments of loans payable as of December 31, 2015 are as follows: 

Within 1 year
More than 1 year

Total

  $

  $

21,775 
756 

22,531 

The weighted average effective interest rate for all short-term and loan-term bank loans was 6.0% in 2015 (2014 - 6.8%, 2013 - 6.6%). The weighted
average  interest  rate  for  short-term  loans  was  6.0%  in  2015  (2014  -  6.8%,  2013  - 7.0%).  The  Company  incurred  $2,059  in  interest  and  financing
expenses for the year ended December 31, 2015 (2014 - $3,374, 2013 - $2,942), of which $nil for the year ended December 31, 2015, was capitalized
in property, plant and equipment (2014 - $nil, 2013 - $116). 

12.

Related Party Transactions and Balances

(a)

Loan from a non-controlling shareholder

Loan -  current

December 31,  
2015  

December 31,
2014

  $

2,470    $

2,595 

F-29  

  
  
  
  
  
  
  
  
  
  
  
   
 
   
  
 
  
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

The Company has a loan due to Dalian Jin Gang Group, the non-controlling shareholder of Sinovac Dalian, which is unsecured, bearing interest 
at 7.2% per year. Interest expense was $183 in 2015 (2014 - $221, 2013 - $237). Interest is payable monthly. As of December 31, 2015, $nil of 
interest payable is included in loan from a non-controlling shareholder (December 31, 2014 - $16). $199, $649 (RMB 4 million) and $237K 
were repaid for the years ended December 31, 2015, 2014 and 2013, respectively. 

(b)

The Company entered into the following transactions in the normal course of operations at the exchange amount with related parties:

 Rent expenses payable to SinoBioway Biotech Group Co. Ltd. 
(“SinoBioway”).

  $

852    $

869    $

847 

2015   

For the year ended December 31,
2013 

2014   

In 2004, the Company entered into two operating lease agreements with SinoBioway, the non-controlling shareholder of Sinovac Beijing, with respect
to  Sinovac  Beijing’s  production  plant  and  laboratory  in  Beijing,  China  with  annual  lease  payments  totaling  $220  (RMB  1.4  million).  The  leases
commenced on August 12, 2004 and have a term of 20 years. One of the lease agreements was amended on August 12, 2010 with the rent increasing
from $81 (RMB 0.5 million) to $220 (RMB 1.4 million) per year. 

In  June  2007,  the  Company  entered  into  another  operating  lease  agreement  with  SinoBioway,  with  respect  to  the  expansion  of  Sinovac  Beijing’s
production plant in Beijing, China for an annual lease payment of $325 (RMB 2.0 million). The lease commenced in June 2007 and has a term of 20
years. 

In  September  2010,  the  Company  entered  into  another  operating  lease  agreement  with  SinoBioway  with  respect  to  expansion  of  Sinovac  R&D’s
business in research and development activities for an annual lease payment of $161 (RMB 1.0 million). The lease commenced on September 30, 2010
and has a term of five years. 

On  April  8,  2013,  the  Company  entered into three  supplemental  agreements  with  SinoBioway, under  which  the expiration date  of  three  of the  four
operating lease agreements was extended to April 7, 2033. 

Included in current and long-term prepaid expenses and deposits as at December 31, 2015, is $377 (RMB 2.4 million) (December 31, 2014-$389 (RMB
2.4 million)), representing prepaid lease payments made to SinoBioway. 

F-30  

  
  
  
  
  
  
  
  
  
  
  
 
 
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

13.

Accounts Payable and Accrued Liabilities

Trade payables
Machinery and equipment payables
Accrued expenses
Value added tax payable
Other tax payable
Withholding tax payable
Bonus and benefit payables
Other payables
Total

14.

Income Taxes

Antigua and Barbuda 

December 31, 2015    December 31, 2014
3,033
$
2,050
8,330
200
171
338
5,626
2,790 
22,538

1,715    $
2,220   
9,647   
260   
183   
238   
5,231   
3,030   
22,524    $

$

Under  the  current  laws  of  Antigua  and  Barbuda,  the  Company  is  not  subject  to  tax  on  income  or  capital  gains.  Additionally,  upon  payments  of
dividends by the Company to its shareholders, no Antigua and Barbuda withholding tax will be imposed. 

Hong Kong 

Under the Hong Kong tax laws, Sinovac Hong Kong is exempted from income tax on its foreign-derived income and there are no withholding taxes in
Hong Kong on remittance of dividends. 

China 

Effective from January 1, 2008, the PRC’s statutory income tax rate is 25%. The Company’s PRC subsidiaries are subject to income tax at the statutory
rate  of  25%  except  for  Sinovac  Beijing.  Sinovac  Beijing,  being  reconfirmed  as  a  “High  and  New  Technology  Enterprise”  (“HNTE”)  in  2014  for  a
period of 3 years, is subject to a preferential income tax rate of 15% from 2014 to 2016. 

The Company’s income before income tax from continuing operations consists of: 

Non-PRC
PRC
Total

For the year ended December 31,  

2015

2014

$

$

(2,802) $
5,833   
3,031

$

(1,336) $
3,982   
2,646

$

2013

(65)
9,476 
9,411

The Company’s (loss) before income tax from discontinued operations consists of: 

Non-PRC
PRC
Total

2015   

$

-
(728)  
(728)   $

For the year ended December 31,  
2013 

2014   

-

$

(1,524)  
(1,524)   $

-
(1,266)
(1,266)

$

  $

Income taxes that are attributed to the discontinued operations in China were $nil for all the periods presented. 

F-31  

  
   
  
   
  
  
  
  
  
  
  
  
  
  
  
  
  
 
 
 
 
 
 
 
 
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

The  benefit  (provision)  for  income  taxes  for  the  years  ended  December  31,  2015,  2014  and  2013  was  allocated  between  continuing  operations  and
discontinued operations as follows: 

Continuing operations
Discontinued operations
Total

Income taxes are attributed to the continuing operations in China and consist of: 

Current
Deferred
Total income tax benefit (expense)

2015   

(2,516) $
-
(2,516)   $

2015   

(3,034) $
518
(2,516)   $

For the year ended December 31,
2013 

2014   

(1,458) $
-
(1,458)   $

2,225
-
2,225 

For the year ended December 31,
2013 

2014   

(1,620) $
162
(1,458)   $

-
2,225
2,225 

$

  $

$

  $

The following is a reconciliation of the Company’s total income tax benefit (expense) to the amount computed by applying the PRC statutory income
tax rate of 25% to its income from continuing operations before income taxes for the years ended December 31, 2015, 2014 and 2013: 

Income from continuing operations before income taxes
Income tax expense at the PRC statutory rate
International tax rate differential
Super deduction for research and development expenses
Non-deductible expenses
Other adjustments
Effect of preferential tax rate
Change in valuation allowance
Effect of PRC withholding tax
Effect of prior years’ income tax arising from tax inspection
Income tax benefit (expense)

$

$

$

2015   
3,031
(758)
(701)
463
(900)
139
1,350
(1,618)
(89)
(402)  
(2,516) $

F-32  

$

For the year ended December 31, 
2013 
9,411
(2,352)
(16)
332
(159)
297
1,573
2,550
-
- 
2,225

2014   
2,646
(662)
(334)
605
(524)
(89)
901
(1,249)
(106)
-   

(1,458) $

  
  
  
  
  
  
  
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

The tax effects of temporary differences from continuing operations that give rise to the Company’s deferred tax assets are as follows: 

Accrued expenses
Inventories
Prepaid expenses and deposits
Deferred government grants
Less: valuation allowance
Deferred tax assets, current portion

Fixed assets
Deferred government grants
Tax losses carried forward
Less: valuation allowance
Deferred tax assets, non-current portion

$

$

$

$

December 31,
2015   
2,551
266
-
203
(417)
2,603

$

1,664
259
9,867
(11,197)  
593

$

2014 
2,410
72
(6)
12
(222)
2,266

1,105
428
8,665
(9,683)
515

In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion of the deferred tax assets
will  not  be  realized.  The ultimate realization  of deferred tax  assets is  dependent  upon the  generation of  future  taxable income during the  periods  in
which the temporary differences become deductible or utilized. The Company considers projected future taxable income and tax planning strategies in
making this assessment. Based upon an assessment of the level of historical taxable income and projections for future taxable income over the periods
in  which  the  deferred  tax assets  are  deductible  or  can  be  utilized,  the  Company  provided  valuation  allowance  of  $11,614  as  of  December  31,  2015
( December 31, 2014 - $9,905). 

The Company evaluates its valuation allowance requirements at end of each reporting period by reviewing all available evidence, both positive and
negative,  and  considering  whether,  based  on  the  weight  of  that  evidence,  a  valuation  allowance  is  needed.  When  circumstances  cause  a  change  in
management’s judgement about the realizability of deferred tax assets, the impact of the change on the valuation allowance is generally reflected in
income from operations. The future realization of the tax benefit of an existing deductible temporary difference ultimately depends on the existence of
sufficient taxable income of the appropriate character within the carryforward period available under applicable tax law. 

Tax losses of the Company’s PRC subsidiaries in the amount of $39,466 (RMB 238 million) as of December 31, 2015 will expire from 2016 to 2020. 

As of December 31, 2015, the Company has not recognized any deferred tax liability on Sinovac Beijing’s undistributed earnings of approximately
$10,733, in view of the Company's permanent reinvestment plan. The Company would be subject to PRC withholding income taxes at 5% or 10%,
depending on the availability of treaty benefit between China and Hong Kong, upon the distribution of such profits outside of China. As of December
31, 2015, the amount of unrecognized deferred tax liability ranges from $537 to $1,073. 

The changes in unrecognized tax benefits are as follows: 

Balance at January 1
Additions for tax positions of the current year
Additions for tax positions of the prior years
Settlement with the taxing authority
Lapse of statute of limitations
Balance at December 31

2015
454
159
281
(103)
(35)
756    $

For the year ended December 31, 
2013
335
15
-
-
-
350 

2014
350
160
-
-
(56)
454    $

  $

F-33  

  
  
  
  
  
  
  
  
  
  
  
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

The Company recognizes interest and penalties, if any, related to unrecognized tax benefits as part of its income tax expenses. The Company did not
record any interest and penalties for the periods presented. The PRC tax law provides statute of limitations ranging from 3 to 5 years and for transfer
pricing related  matters, it could be extended  to 10  years. The  PRC  tax returns for  the Company’s  PRC subsidiaries are  open  to  examination  by tax
authorities for the tax years beginning in 2005. 

As of December 31, 2015, the Company had unrecognized tax benefits of approximately $756 (December 31, 2014 - $454, December 31, 2013 - $350)
and such balance was included in “other non-current liabilities”. As of December 31, 2015, unrecognized tax benefits amounting to $607 would affect
the effective tax rate if recognized (December 31, 2014 - $454, December 31, 2013 - $350). In February 2015, a local taxing authority initiated a tax
audit on one of the Company’s PRC subsidiaries for the year ended December 31, 2013. The local taxing authority completed the audit in September
2015 and disallowed the deductibility of certain expenses of the concerned subsidiary. The Company paid $397 income tax expenses as a result of the
tax audit. The potential tax exposures of the related open tax years for similar expenses were $281, which was recorded as unrecognized tax benefits as
of December 31, 2015. The Company does not expect the amount of unrecognized tax benefits would change significantly in the next 12 months. 

15.

Deferred Revenue

Current deferred revenue included $6,549 received from the Chinese government for stockpiling of H5N1 vaccines (December 31, 2014 - $3,546) that
expire within one year and $1,595 of advances from customers (December 31, 2014 - $1,450). 

No long-term deferred revenue was received from the Chinese government for stockpiling of H5N1 vaccines as of December 31, 2015 (December 31,
2014 -$7,191). 

16.

Deferred Government Grants

Deferred  government  grants  represent  funding  received  from  the  government  for  research  and  development  (“R&D”),  or  investment  in  building  or
improving  production  facility.  The  amount  of  deferred  government  grants  as  at  year  end  is  net  of  research  and  development  expenditures  or
depreciation incurred or those recognized as government grant income. The Company received $236 (RMB 1.5 million) of government grant in 2015
(2014  -  $3,496  (RMB  21.6  million),  2013  -  $842  (RMB  5.2  million)).  In  addition,  the  Company  received  $308  (RMB  1.9  million),  $24  (RMB  0.1
million  )  and  $nil  interest  subsidy,  rental  fee  subsidy  and  other  government  grants  recognized  in  the  statements  of  comprehensive  income  (loss)  in
2015, 2014 and 2013, respectively. 

F-34  

  
   
  
  
  
  
  
  
  
  
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

Summarized below are deferred government grants as of December 31, 2015 and 2014: 

Construction of a pandemic influenza vaccine plant and buildings (a)
Purchasing equipment for H1N1 vaccine production (b)
Purchasing equipment for H5N1 vaccine production (c)
EV71 vaccine production facility (d)
Research and development for EV71 (e)
Loan from Zhongguancun Development Group (f)
Others (g)
Current deferred government grants
Construction of a pandemic influenza vaccine plant and buildings (a)
Purchasing equipment for H1N1 vaccine production (b)
Purchasing equipment for H5N1 vaccine production (c)
EV71 vaccine production facility (d)
Research and development for EV71 (e)
Loan from Zhongguancun Development Group (f)
Others (g)
Non-current deferred government grants
Total deferred government grants

December 31,   
2015   
278    $
137     
15     
259     
77     
358     
78     
1,202     
848     
330     
46     
2,828     
-     
-     
678     
4,730     
5,932    $

December 31,
2014
290
143
16
-
-
-
81 
530
1,176
488
64
3,223
1,524
376
643 
7,494
8,024

$

$

(a) Deferred government grants included $1,126 (RMB 7.3 million) representing the unamortized portion of the amount that the Company received in
2007 for construction of a pandemic influenza vaccine plant and buildings of RMB 20 million (December 31, 2014 - $1,466 (RMB 9.1 million)). $278
(RMB 1.8 million) which will be amortized in 2016 was included in the current portion and $848 (RMB 5.5 million) which will be amortized after
2016 was included in the non-current portion of the deferred government grants. The production facility grant requires the Company to have the entire
facility  available  to  manufacture  pandemic  influenza  vaccines  at  any  given  moment  upon  request  by  the  Chinese  government.  The  Company  has
fulfilled the conditions attached to the government grant. Government grant relating to these production facilities of $287, $290 and $237 for the years
ended December 31, 2015, 2014 and 2013 were recorded as a reduction to depreciation expense for those respective years. 

(b) Deferred government grants also included $467 (RMB 3.0 million) being the unamortized portion of the amount that the Company received in 2009
for purchasing equipment for H1N1 vaccine production with a total amount of $999 (RMB 6.2 million). The amount of $137 (RMB 0.8 million) which
will be recognized in 2016 was included in the current portion and the amount of $330 (RMB 2.2 million) which will be recognized after 2016 was
included  in  the  non-current  portion  of  deferred  government  grants.  The  Company  has  fulfilled  the  conditions  attached  to  the  government  grant.
Government grant relating to this production facility of $141, $143 and $119 for the years ended December 31, 2015, 2014 and 2013 were recorded as
a reduction to the related depreciation expense. 

(c) Deferred government grants also included $61 (RMB 0.4 million) being the unamortized portion of the amount that the Company received in 2013
for purchasing equipment for H5N1 vaccine production. The Company has fulfilled the conditions attached to the government grant. The amount of
$15 (RMB 0.1 million) which will be amortized in 2016 was included in the current portion and the amount of $46 (RMB 0.3 million) which will be
amortized after 2016 was included in the non-current portion of deferred government grants. Government grant relating to this production facility of
$16,  $16  and  $16  for  the  years  ended  December  31,  2015,  2014  and  2013,  respectively,  were  recorded  as  a  reduction  to  the  related  depreciation
expense. 

F-35  

  
  
  
  
  
  
  
 
 
 
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

(d) The Company received a government grant in the amount of $3,087 (RMB 20 million) for equipment purchase and construction of the Enterovirus
71 ("EV71") vaccine production facility. As of December 31, 2015, the Company has not fulfilled the conditions attached to the government grant. The
Company obtained the Good Manufacturing Practices (“GMP”) certificate of its EV71 vaccine issued by the CFDA in January 2016, which was the
final major condition attached to the grant. The amount of $259 (RMB 1.7 million) which will be amortized in 2016 was included in the current portion
and the amount  of  $2,828  (RMB  18.3 million) which will be  amortized  after 2016 was  included in  the  non-current  portion  of  deferred  government
grants. 

(e) Deferred government grants also included $77 (RMB 0.5 million) that the Company received in 2015 for EV71 research and development. As the
Company has obtained the GMP certificate of its EV71 vaccine issued by the CFDA in January 2016 and is expected to fulfill the conditions within
one year, the grant is recorded as a current deferred government grant. As of December 31, 2015, the Company has obtained the new drug certificate
and production license of EV71 vaccine issued by the CFDA, and has fulfilled the conditions attached to three government grants received in prior
years  for  EV71  research  and  development  with  a  total  amount  of  $1,598  (RMB  10  million).  These  grants  were  recognized  as  government  grant
recognized in income for the year ended December 31, 2015. 

(f) The Company received a loan of $1,934 (RMB 12 million) bearing an interest rate of 0.36% per year from Beijing Zhongguancun Development
Group. The fair value differential (between the face value and the fair value using the effective interest rate method at the Company's borrowing rate of
6.9%) is recorded as current deferred government grant of $358 (December 31, 2014 - $376) (see note 11), since the loan will mature in 2016. The
Company has repaid the loan in full in February 2016. 

(g)  Deferred  government  grants  also  included  $756  (RMB  4.9  million)  in  relation  to  four  other  research  projects.  As  of  December  31,  2015,  the
conditions attached to three of the four government grants totalling $678 (RMB 4.4 million) have not been fulfilled by the Company. As the Company
does not expect to fulfill the conditions within one year, these grants are recorded as non-current deferred government grants (December 31, 2014 -
$642  (RMB  4  million)).  The  Company  expects  to  fulfil  the  conditions  attached  to  one  of  the  four  grants  and  recorded  $78  (RMB  0.5  million)  as  a
current deferred government grant (December 31, 2014 - $81 (RMB 0.5 million)). 

17.

Commitments and Contingencies

(a)

Operating Lease Commitments

The Company leases production plant and laboratory under operating leases from its related parties (note 12(b)). Rental expense amounted to $852 for
the year ended December 31, 2015 (2014 - $869, 2013 - $847). 

F-36  

  
  
  
  
  
  
  
  
  
  
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

Minimum future rental payments under operating leases to related parties for the years ending December 31 are as follows: 

2016
2017
2018
2019
2020
Thereafter
Total minimum future payments

(b)

Other Commitments

$

  $

852 
852 
852 
852 
852 
8,601 
12,861 

In addition to commitments disclosed in note 24, commitments related to R&D expenditures are $441 as at December 31, 2015. 

Commitments related to capital expenditures for the Company’s Sabin Inactivated Polio vaccine, pneumococcal polysaccharide vaccine and varicella
vaccine production facilities are approximately $1,726 as at December 31, 2015. 

18.

Common Stock

Share Capital 

Each share of common stock is entitled to one vote per share and is entitled to dividends when declared by the Company’s board of directors. As of
December 31, 2015 and 2014, there were 56,906,561 and 55,809,661 shares of common stock outstanding, respectively. As of December 31, 2015 and
2014, there was no preferred stock issued and outstanding. 

In 2013, the Company issued 360,600 shares of common stock on the exercise of employee stock options with exercise price of $1.60 per share and
118,200 shares of  common stock on  the  exercise of  employee stock  options with  exercise  price  of $2.37 per share,  for total proceeds  of $848. The
Company received further cash proceeds of $18 on the exercise of stock option for which the shares were issued subsequent to December 31, 2013. 

In 2014, the Company issued 48,000 shares of common stock on the exercise of employee stock options with exercise price of $1.60 per share and
191,300 shares of  common stock on  the  exercise of  employee stock  options with  exercise  price  of $2.37 per share,  for total proceeds  of $512. The
Company received further cash proceeds of $51 on the exercise of stock option for which the shares were issued subsequent to December 31, 2014. 

In 2015, the Company issued 115,500 shares of common stock on the exercise of employee stock options with exercise price of $1.60 per share and
252,400 shares of  common stock on  the  exercise of  employee stock  options with  exercise  price  of $2.37 per share,  for total proceeds  of $732. The
Company received further cash proceeds of $18 on the exercise of stock option for which the shares were issued subsequent to December 31, 2015. 

In May 2015, the Company granted 729,000 restricted shares at par value of $0.001 for total proceeds of $1 to directors, officers and employees of the
Company. 

F-37  

  
  
  
   
  
  
  
  
  
  
  
  
  
  
  
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

19.

Stock Options

(a)

Stock Option Plan

The board of directors approved a stock option plan (the “2003 Plan”) effective on November 1, 2003, pursuant to which directors, officers, employees
and consultants of the Company are eligible to receive grants of options for the Company’s common stock. The 2003 Plan expires on November 1,
2023.  Up  to  10%  of  the  Company’s  then  outstanding  common  stocks  were  reserved  for  issuance  under  the  2003  Plan.  As  of  December  31,  2015,
42,800  shares  of  common  stock  under  the  2003  Plan  remain  available  for  issuance.  Each  stock  option  entitles  its  holder  to  purchase  one  share  of
common stock of the Company. Options may be granted for a term not exceeding 10 years from the date of grant. The 2003 Plan is administered by the
board of directors. 

In  December  2011,  the  Company  granted  767,000  options  to  employees  with  an  exercise  price  of  $2.37,  being  the  quoted  market  price  of  the
Company’s  shares  at  the  time  of  grant.  10%  of  the  options  vest  every  three  months  from  December  26,  2012  to  March  26,  2015  and  expire  on
December 25, 2017. This grant was fully vested on March 26, 2015. 

On May 1, 2012, the Company granted 50,000 options to an officer with an exercise price of $2.05, being the quoted market price of the Company’s
shares at the time of grant. The options were granted on May 1, 2012 and expire on April 30, 2017. 10% of the options will vest on May 1, 2013 (the
“Initial Vesting Date”) and the remaining options will vest at 10% in equal quarterly proportions over a period of 27 months from the Initial Vesting
Date. The officer has left the Company at the end of May 2013 and forfeited the unvested options in June 2013. 

On August 22, 2012, the board of directors approved a new stock option plan (the “2012 Plan”), which allowed the Company to issue up to 4,000,000
options for common shares and restricted shares of the Company to directors, officers, employees and consultants of the Company. Each stock option
entitles its holder to purchase one share of common stock of the Company. Options and restricted shares may be granted for a term not exceeding 10
years from the date of grant. The 2012 Plan is administered by the board of directors. The 2012 Plan will expire on August 22, 2022. Any awards that
are outstanding on August 22, 2022 will remain in force according to the terms of the 2012 Plan and the applicable award agreement. 

On May 1, 2015, the Company granted 729,000 restricted shares at par value of $0.001 and 1,341,000 options under the 2012 Plan with an exercise
price of $4.98, being the quoted market price of the Company’s shares at the time of grant. The options will expire on April 30, 2023. One-fifth (1/5) of
the restricted shares and options shall vest on the first, second, third, fourth and fifth anniversaries of date of grant, respectively. The restricted shares
are not subject to any restriction on transfer and repurchase after they are vested. 

F-38  

  
  
  
  
  
  
  
  
  
  
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

(b)

Valuation Assumptions

The following assumptions were used in determining the fair value of stock options under the Black-Scholes option-pricing model for grants under the
2012 Plan: 

Expected volatility
Risk-free interest rate
Expected life (years)
Dividend yield
Estimated forfeiture rate

2015

2014

2013

51.42%
1.5%
5.5

0%
7%

-     
-     
-     
-     
-     

-
-
-
-
-

The weighted average fair value of options granted for the year ended December 31, 2015 was $2.37 per option (2014 - $nil, 2013 - $nil). 

Expected volatility is estimated based on the Company’s historical stock prices. Computation of expected life was estimated using simplified method
for  “plain-vanilla”  options  as  the  Company  considers  the  options  granted  to  have  “plain-vanilla”  characteristics.  The  risk-free  interest  rates  for  the
period  within  the  contractual  life  of  the  awards  are  based  on  the  U.S.  Treasury  yield  in  effect  at  the  time  of  grant.  Estimated  forfeiture  rates  are
determined based on expected future employee behaviour. 

The fair value of restricted shares is based on the fair market value of the underlying common stock on the date of the grant. 

F-39  

  
  
  
  
  
  
  
  
  
 
   
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

(c)

Stock-based Payment Award Activity

A summary of the Company’s stock options activity for the 2003 and 2012 Plan is presented below: 

Number
of Options

Weighted  
Average
Exercise Price
($/option)

Outstanding as at January 1, 2015
Granted
Exercised
Forfeited / Expired
Outstanding as at  December 31, 2015

Vested and expected to vest  at  December 31, 2015
Exercisable as at  December 31, 2015

$

637,200
1,341,000
(367,900)
(129,900)  
1,480,400    $

1,386,530

$
139,400    $

A summary of the Company’s non-vested restricted share activity for the 2012 plan is presented below: 

Non-vested as at January 1, 2015
Granted
Vested
Forfeited / Expired
Non-vested as at  December 31, 2015

As at December 31,2015 

Aggregate Intrinsic
Value
($)
1,997,644
-
-
- 
1,459,330 

$

2.09
4.98
2.13
1.71   
4.73    $

4.72
$
2.37    $

1,389,866
466,990 

Number 
of Non-Vested 
Restricted 
shares

Weighted Average
Grant Date 
Fair Value ($)

$

—  
729,000
—  
—  
729,000    $

—  
4.98
—  
—  
4.98 

Exercise
Prices
($/option)

Number of 
Options
Outstanding

Remaining Average
Contractual
Life (years)

Average 
Exercise
Price
($/option)

Number 
of  
Options
Exercisable

Remaining 
Contractual
Life (years)

Average Exercise
Price
($/option)

$
$

2.37     
4.98     

139,400     
1,341,000     
1,480,400     

1.99
$
7.33    $
6.83

2.37
4.98   

139,400    
-     
139,400    

1.99

1.99

$
-     
$

2.37
- 
2.37

Stock-based compensation expense, included in cost of sales, selling, general and administrative expenses, and R&D expenses is charged to operations
over the vesting period of the options using the straight-line amortization method. The share-based compensation expense was $952 in 2015 (2014 -
$287, 2013 - $281). As of December 31, 2015, there was $2,557and $2,921 of unrecognized compensation cost related to non-vested stock options and
non-vested  restricted  shares,  respectively,  granted  under  the  2012  Plan,  which  will  be  recognized  over  a  weighted  average  period  of  52  months,
respectively. 

F-40  

  
  
  
  
  
  
  
  
  
   
  
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
   
 
   
 
   
 
 
   
 
   
 
 
 
 
      
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

The aggregate intrinsic value of the Company’s stock options is calculated as the difference between the exercise price of the options and the quoted
price of the common shares that were in the money. The aggregate intrinsic value of the Company’s stock options exercised under the 2003 Plan was
$1,118 for year ended December 31, 2015, determined as of the date of option exercise (2014 - $840, 2013 - $1,344). 

The estimated fair value of stock options vested during the year ended December 31, 2015 was $104 (2014 - $414, 2013 - $420). 

20.

Statutory surplus reserves

Pursuant  to  Chinese  company  law  applicable  to  foreign  investment  companies,  the  Company’s  PRC  subsidiaries  are  required  to  maintain  statutory
surplus  reserves.  The  statutory  surplus  reserves  are  to  be  appropriated  from  net  income  after  taxes,  and  should  be  at  least  10%  of  the  after  tax  net
income  determined  in  accordance  with  accounting  principles  and  relevant  financial  regulations  applicable  to  PRC  enterprises  (“PRC  GAAP”).  The
Company  has  an  option  of  not  appropriating  the  statutory  surplus  reserve  after  the  statutory  surplus  reserve  is  equal  to  50%  of  the  subsidiary’s
registered capital. Statutory surplus reserves are recorded as a component of shareholders’ equity. The statutory surplus reserve as at December 31,
2015 is $13,450 (2014 - $12,627). 

For  the  year  ended  December  31,  2015,  Sinovac  Beijing  appropriated  10%  (2014  -  10%,  2013  -  0%)  of  its  after-tax  profit,  determined  under  PRC
GAAP, to the statutory surplus reserves. For the year ended December 31, 2015, statutory surplus reserves appropriated are $823 (RMB 5.2 million)
(2014 - $819, 2013 - $nil). 

Pursuant to the same Chinese company law, the Company’s subsidiaries, Sinovac Beijing, Tangshan Yian, Sinovac R&D, Sinovac Dalian and Sinovac
Biomed  can  transfer,  at  the  discretion  of  their  respective  boards  of  directors,  a  certain  amount  of  their  annual  net  income  after  taxes  as  determined
under PRC GAAP to a staff welfare and bonus fund which shall be utilized for collective staff benefits. For the year ended December 31, 2015, the
amount is $nil for contribution to such fund (2014 - $nil, 2013 - $nil). The amounts appropriated to the staff welfare and bonus fund were charged
against income and the related provisions were reflected as accrued liabilities in the consolidated balance sheets. 

Tangshan  Yian  recorded  a  net  loss  for  each  of  the  three  years  in  the  period  ended  December  31,  2015,  so  no  appropriation  to  the  statutory  surplus
reserves and staff welfare and bonus fund was made. 

Sinovac R&D, Sinovac Dalian and Sionvac Biomed have not made any profit since inception. No appropriation to the statutory surplus reserves and
staff welfare and bonus were made. 

Dividends declared by the Company’s PRC subsidiaries are based on the distributable profits as reported in their statutory financial statements reported
in accordance with PRC GAAP, which differ from the results of operations reflected in the consolidated financial statements prepared in accordance
with  US  GAAP.  The  Company’s  ability  to  pay  dividends  is  primarily  dependent  on  the  Company  receiving  distributions  of  funds  from  its  PRC
subsidiaries. Dividends declared in 2015 was $nil to the non-controlling shareholder of Sinovac Beijing (2014 - $nil, 2013 - $nil). As of December 31,
2015, the Company has $nil dividend payable (December 31, 2014 - $nil). 

F-41  

  
  
  
  
  
  
  
  
  
  
  
  
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

Under  PRC  laws  and  regulations,  statutory  surplus  reserves  are  restricted  to  set-off  against  losses,  expansion  of  production  and  operation  and
increasing  registered  capital  of  the  respective  company,  and  are  not  distributable  other  than  upon  liquidation.  Staff  welfare  and  bonus  funds  are
restricted  to  expenditures  for  the  collective  welfare  of  employees.  The  reserves  are  not  allowed  to  be  transferred  to  the  Company  in  terms  of  cash
dividends, loans or advances, nor are they allowed for distribution except under liquidation. Amounts restricted include the PRC subsidiaries’ paid-in
capital and statutory surplus reserves of the Company’s PRC subsidiaries totalling $77,511 (RMB 502 million) as of December 31, 2015 (December
31, 2014, $80,091 (RMB 497 million)). Further, foreign exchange and other regulations in the PRC further restrict the Company’s PRC subsidiaries
from transferring funds to the Company in the form of loans, advances or cash dividends. As of December 31, 2015, amounts restricted include the net
assets of the Company’s PRC subsidiaries, which amounted to $66,590 (December 31, 2014 - $61,345). 

21.

Non-controlling Interests

Non-controlling  interests  represent  the  interest  of  non-controlling  shareholders  in  Sinovac  Beijing  and  Sinovac  Dalian  based  on  their  proportionate
interests  in  the  equity  of  that company  adjusted for  its  proportionate share  of income  or losses from  operations.  On  October  1,  2011, the  Company
increased its ownership in Sinovac Beijing by an additional 1.53% by contributing the dividends declared to Sinovac Hong Kong but unpaid in the
amount of $2,998 (RMB 18.6 million). An adjustment of $258 (RMB 1.6 million) resulted from the difference between the adjustment to the carrying
amount  of  the  non-controlling  interest  in  Sinovac  Beijing  and  the  consideration  that  was  charged  to  additional  paid-in  capital.  The  non-controlling
interest in Sinovac Beijing was 28.44% prior to October 1, 2011 and was 26.91% after October 1, 2011. On April 8, 2013, SinoBioway transferred its
26.91% equity interests in Sinovac Beijing to SinoBioway Bio-medicine Co., Ltd, (formerly named Xiamen Bioway Biotech Co., Ltd.), a company
owned by SinoBioway. There was no change to the composition of the board of directors of Sinovac Beijing after the completion of the transaction.
The non-controlling interest in Sinovac Dalian was 45% as of December 31, 2015 and December 31, 2014. 

F-42  

  
  
  
  
  
  
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

22.

Earnings (loss) per Share

The following table sets forth the computation of basic and diluted income (loss) attributable to shareholders of Sinovac per share:: 

For the year ended December 31
Numerator
Income (loss) from continuing operations
Less: Income (loss) attributable to non-controlling interests
Income (loss) attributable to shareholders of Sinovac from continuing operations
Income (loss) attributable to shareholders of Sinovac from discontinued operations
Net income (loss) attributable to shareholders of Sinovac

2015

2014

2013

515     
861     
(346)    
(728)    
(1,074)    

1,188

515   
673
(1,524)
(851)

11,636
2,928 
8,708
(1,266)
7,442

Denominator
Basic weighted average number of common shares outstanding
Dilutive effect of stock options
Diluted weighted average number of common shares outstanding

Basic net income (loss) per share
Continuing operations
Discontinued operations
Basic net income (loss) per share

Diluted net income (loss) per share
Continuing operations
Discontinued operations
Diluted net income (loss) per share

56,313,927     
-     
56,313,927     

55,681,076
433,126
56,114,202

55,301,276
501,062
55,802,338

(0.01)    
(0.01)    
(0.02)    

(0.01)    
(0.01)    
(0.02)    

0.01
(0.03)  
(0.02)  

0.01
(0.03)
(0.02)  

0.15
(0.02)
0.13 

0.15
(0.02)
0.13 

Anti-dilutive options were not included in the diluted EPS calculation for the year ended December 31, 2015. 

Anti-dilutive non-vested restricted shares were not included in the diluted EPS calculation for the year ended December 31, 2015. 

23.

Segment Information

The Company operates exclusively in the biotechnology sector. The Company’s business is considered as operating in one segment. The Company’s
Chief  Executive  Officer  is  the  chief  operating  decision  maker  and  reviews  the  consolidated  results  of  operations  when  making  decisions  about
resources allocation and assessing performance of the Company as a whole. All revenues are generated from the subsidiaries located in China. Total
long-lived  assets  of  $73,514  including  prepaid  land  lease  payments,  property,  plant  and  equipment  and  licenses  are  all  located  in  mainland  China
(December 31, 2014 - $76,846). The Company’s total assets by geographic location are as follows: 

Assets
Mainland China
Hong Kong
Total

 December 31, 2015  December 31, 2014 

$

 $

173,629  $
29,355   
202,984  $

207,645
30,885
238,530 

F-43  

  
  
  
  
  
  
  
  
  
  
  
   
      
 
 
      
   
      
      
  
 
      
      
 
 
 
      
      
 
 
    
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

The Company’s revenues by product are as follows: 

Sales
Inactivated hepatitis vaccines
Influenza vaccines
H5N1
Mumps
Total

2015   

$

49,416
12,674
3,852
1,472
67,414    $

For the year ended December 31,
2013 

2014   

48,450  $
12,131 
201 
2,150 
62,932    $

47,202
12,156
10,736
1,680
71,774 

$

  $

For the year ended December 31, 2015, one of the Company’s customer accounted for 14% of the Company’s total vaccines revenue, at $9,128. The
H5N1 vaccines were all sold to the Chinese government. The Company’s sales of H5N1 vaccines are dependent on government stockpiling purchases. 

The Company’s revenues are attributed to geographic locations as follows: 

Sales
Mainland China
Foreign countries
Total

2015   

66,779

$

635   
67,414    $

For the year ended December 31, 
2013 

2014   

61,955  $
977   
62,932    $

70,647
1,127 
71,774 

$

  $

F-44  

  
  
  
  
  
  
  
  
 
 
 
  
 
 
 
 
  
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

24.

Collaboration Agreements

(a)

On  March  12,  2009,  the  Company  entered  into  a  technology  transfer  agreement  (with  an  amendment  agreement  entered  on  December  14,
2011)  with  Tianjin  CanSino  Biotechnology  Inc.  (“Tianjin  Cansino”).  According  to  the  agreement,  Tianjing  Cansino  will  transfer  the
technology related to pneumococcal vaccine to the Company and jointly develop the technology with the Company. The collaboration term
under  the  technology  transfer  agreement  is  from  March  12,  2009  to  eight  years  after  the  first  sale  of  the  vaccine  developed  under  the
technology transfer agreement in the Chinese market.

Under  the  terms  of  the  technology  transfer  agreement,  the  Company  will  make  milestone  payments  of  up  to  $3,000  and  royalty  payments
ranging  from  6%  to  10%  of  net  sales  in  China.  Both  parties  will  work  together  to  develop  international  markets  for  the  products.  On
November  17,  2009  and  December  14,  2011,  two  amendment  agreements  were  signed  for  the  payment  of  $300  for  the  transfer  of  an
additional six serotypes and related technology. As of December 31, 2015, the Company made total milestone payments of $1,200 ($1,000
under the March 12, 2009 agreement and $200 under the December 14, 2011 amendment). The remaining milestone payments will be paid
when  the  Company  achieves  each  specific  milestone,  which  includes  obtaining  clinical  trials  approval,  completing  clinical  trials  and
achievement of desired results, and achievement of commercial sales. 

On January 29, 2015, the Company entered into a third amendment to the technology transfer agreement dated March 12, 2009 and the two
amendment agreements  dated November  17,  2009 and December 24, 2011. By  entering into this third amendment,  the  technology transfer
agreement was revised to be a licensing agreement. The remaining milestone and royalty payments under the technology transfer agreement
have  been  reduced.  Both  the  Company  and  Tianjin  Cansino  are  free  to  develop  pneumococcal  vaccines  or  to  collaborate  with one  other
company for the same purpose. The Company made a payment of $300 and recorded it in R&D expenses in March 2015 (2014 - $nil, 2013 -
$nil). 

(b)

On August 18, 2009, the Company entered into a patent license agreement with the National Institutes of Health (“NIH”), an agency of the 
United States Public Health Services within the Department of Health and Human Services. NIH has granted the Company a non-exclusive 
license  to  make  and  use  certain  of  its  products.  NIH  has  also  granted  the  Company  the  right  to  use  certain  associated  information  for
development of its licensed products. The collaboration term under the patent license agreement is from August 18, 2009 to the later of (a) the
expiration of all royalty obligations under the licensed rights where such rights exist and (b) eight years after the first commercial sale by the
Company, unless the agreement is terminated earlier per the provisions included therein.

F-45  

  
   
  
  
  
  
  
  
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

(c)

(d)

The Company has agreed to pay NIH a license issue royalty of $80 upon execution of the agreement and a non-refundable minimum annual
royalty of $8, and royalty payments on net sales ranging from 1.5% to 4% depending on the sales territory and the customers. The Company
has  also  agreed  to  pay  NIH  benchmark  royalties  of  $330  upon  achieving  each  benchmark  as  specified  in  the  patent  license  agreement,
including  completion  of  clinical  trials,  obtaining  regulatory  approval  for  marketing,  and  achievement  of  commercial  sales.  The  Company
recorded a license issue royalty of $9 for the year ended December 31, 2015 as R&D expenses (2014 - $8, 2013 - $21). 

On August 15, 2011, the Company licensed from Medimmune, LLC, a US based pharmaceutical company, certain non-exclusive rights to use 
patented reverse genetics technology pertaining to H5N1 influenza virus strain production for vaccines. The Company has agreed to pay an
upfront license fee and milestone payments of up to an aggregate of $9.9 million based upon achievement of cumulative net sales of licensed
products in China (including Hong Kong and Macau), as well as royalty payments in single digit of net sales of the licensed products in China
(including Hong Kong and Macau). License fee and royalties of $3,400 accrued at the end of 2011 were paid in 2012. In 2013, the Company
obtained a new stockpile order of 3 million doses of H5N1 vaccines from the Chinese government. For the year ended December 31, 2013,
royalties of $1,036 was capitalized as inventory costs and included in accounts payable and accrued liabilities, which was paid in May 2014.
No royalties were incurred for the years ended December 31, 2015 and 2014, respectively.

On  August  15,  2012,  the  Company  entered  into  amendment  agreements  with  Medimmune  to  revise  the  termination  date  of  the  license  to
December 29, 2015 as a result of amendment of the main license agreement to end on December 29, 2015. 

On  April  3,  2014,  the  Company  entered  into  a  non-exclusive  license  agreement  (the  “Agreement”)  with  The  Institute  for  Translational
Vaccinology (“INTRAVACC”), a governmental institute working under the Dutch Ministry of Public Health, Welfare and Sports, to develop
and  commercialize  the  Sabin  Inactivated  Polio  Vaccine  (“sIPV”)  for  distribution  in  China  and  other  countries.  The  Company  expects  to
develop and commercialize the vaccine in China, as well as seeking regulatory approval in other countries. The agreement has a term of 50
years.

The Company has agreed to pay INTRAVACC up to $2,406 (€1.5 million), net of PRC tax, including an entrance fee and milestone payments
upon achieving specific milestones. The Company has also agreed to pay royalty payments in a single digit percentage of net sales generated
worldwide from the product or products developed under the Agreement. The Company recorded an entrance fee of $665 (€0.5 million) for the 
year  ended  December  31,  2014  as  research  and  development  expense.  The  Company  also  recorded  $125  (€94)  for  payment  made  to 
INTRAVACC for use of sIPV viral seeds in R&D expenses for the year ended December 31, 2014. There was no expense incurred or paid to
INTRAVACC for the year ended December 31, 2015. 

F-46  

  
  
  
  
  
  
  
  
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

(e)

In September 2015, Sinovac Dalian entered into a technology transfer and supply agreement with GlaxoSmithKline Biologicals SA, or GSK,
to use GSK’s measles seeds to develop combination vaccines containing measles for the China market. Under this agreement, GSK agreed to
transfer its measles seeds, provide reasonable assistance and relevant technical materials to Sinovac Dalian for the purpose of developing and
producing combination vaccines containing measles.

25.

Subsequent Events

In February 2016, the Company completed the disposal of Tangshan Yian. 

In March 2016, the Company adopted a shareholder rights plan (the “Rights Plan”). Pursuant to the Rights Plan, subject to limited exceptions,
upon (i) a person or group obtaining ownership of 15% or more of the Company’s common shares or (ii) the commencement or announcement
of an intention to make a tender offer or exchange offer, the consummation of which would result in the beneficial ownership by a person or
group of 15% or more of the Company’s common shares, in each case, without the approval of the Company’s board of directors, each Right
will entitle the holders, other than the acquiring person, to buy, at an exercise price of $30.00, one one-thousandth of a share of the newly
created series A junior participating preferred shares of the Company, or the Series A Preferred Shares.  Holders are entitled to receive, in lieu
of each one one-thousandths of a Series A Preferred Share, common shares having a market value at that time of twice the Right’s exercise
price. The Company’s board of directors is entitled to redeem the Rights at $0.001 per Right at any time before the Rights are exercisable. The
Company refers to the person who acquired 15% or more of the outstanding common shares of the Company as the “acquiring person.” 

26.

Condensed Financial Information of the Parent Company

Balance Sheets 

ASSETS
Current assets
Cash and cash equivalents
Prepaid expenses and other receivables
Amount due from subsidiaries
Dividend receivables
Total current assets
Investment in subsidiaries
Total assets

LIABILITIES AND EQUITY

Current liabilities
Accrued expenses and other payables
Amount due to subsidiaries

Total current liabilities

Total liabilities

EQUITY
Preferred stock
Authorized 50,000,000 shares at par value of $0.001 each
Issued and outstanding: nil
Common stock
Authorized: 100,000,000 shares at par value of $0.001 each
Issued and outstanding: 56,906,561 (2014 – 55,809,661)
Additional paid-in capital
Accumulated other comprehensive income
Retained earnings
Total stockholders' equity

December 31,
2015

December 31,
2014

$

$

$

$

$

$

$

331
70
66,032
21,280
87,713
41,711   
129,424

666
5,478

6,144

6,144

$

-

57

997
9
69,824
21,280
92,110
38,616 
130,726

584
3,578

4,162

4,162

-

56

109,944
8,110
5,169   

123,280

108,243
12,022
6,243 
126,564

Total liabilities and equity

$

129,424

$

130,726

F-47  

  
  
  
  
  
  
  
  
  
   
 
 
 
 
 
 
 
   
 
 
 
 
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

Statements of Comprehensive Income (Loss) 

For the year ended December 31
2014

2015

2013

Selling, general and administrative expenses

Total operating expenses
Loss from operations
Other expense
Interest income

Equity earnings of subsidiaries, net of tax

Net income (loss)

Other comprehensive income (loss), net of tax of nil

Foreign currency translation adjustments

2,563

2,563   
(2,563)
(5,053)
413

6,129   

(1,074)

-

(3,912)

2,466

2,466   
(2,466)
-
759

856   

(851)

-

(2,119)

Total comprehensive income (loss)

$

(4,986) $

(2,970) $

F-48  

2,710

2,710 
(2,710)
-
755

9,397 

7,442

-

2,370

9,812

  
  
   
  
   
 
 
 
 
 
 
 
 
 
 
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

Statements of Cash Flows 

Cash flows provided by (used in) operating activities
Net income (loss)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating 
activities:
-stock-based compensation
-equity in (earnings) of subsidiaries
Changes in:
- Amount due from subsidiaries
- Prepaid expenses and other receivables
- Dividend receivables
- Amount due to subsidiaries
- Accrued expenses and other payables

Net cash provided by (used in) operating activities

Cash flows provided by financing activities
- Proceeds from issuance of common stock, net of share issuance costs
- Proceeds from shares subscribed

Net cash provided by financing activities

Cash flows provided by (used in) investing activities
-Investment in subsidiaries

Net cash provided (used in) investing activities

Decrease in cash and cash equivalents

Cash and cash equivalents, beginning of year

For the year ended December 31
2014

2015

2013

$

(1,074) $

(851) $

7,442

952
(6,129)

3,792
(61)
-
1,900
82

(538)

732
18

750

(878)

(878)

(666)

997

287
(856)

(1,304)
114
-
1,815
(336)

(1,131)

512
51

563

165

165

(403)

1,400

281
(9,397)

2,505
59
1,043
1,130
(776)

2,287

848
18

866

(4,042)

(4,042)

(889)

2,289

1,400 

Cash and cash equivalents, end of year

  $

331    $

997    $

(a) Basis of presentation 

The condensed financial information has been prepared using the same accounting policies as set out in the accompanying consolidated financial statements 
except that the Company used the equity method to account for investment in its subsidiaries. 

The Company records its investment in its subsidiaries under the equity method of accounting. Such investment is presented on the balance sheets as 
“Investment in subsidiaries” and share of their income (loss) as “Equity earnings (losses) of subsidiaries” in the statements of comprehensive income (loss). 

Each of the Company’s PRC subsidiaries has restrictions on its ability to pay dividends to the Company under PRC laws and regulations (Note 20). The 
subsidiaries did not pay any dividends to the Company for the years presented. 

F-49  

  
   
  
  
  
  
  
  
  
 
 
 
 
 
 
 
 
 
 
SINOVAC BIOTECH LTD. 
Notes to Consolidated Financial Statements 
(Expressed in thousands of U.S. dollars, unless otherwise stated) 

Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or 
omitted by reference to the consolidated financial statements. 

(b) Commitments 

The  Company  does  not  have  any  significant  commitments  or  long-term  obligations  as  of  any  of  the  periods  presented,  except  for  those  disclosed  in  the
consolidated financial statements (notes 17 and 24). 

F-50  

  
  
  
  
  
  
  
List of Subsidiaries 

1.

2.

3.

4.

5.

Sinovac Biotech (Hong Kong) Ltd., a Hong Kong company

Sinovac Biotech Co., Ltd., a PRC company

Sinovac Research and Development Co., Ltd. (formerly known as Beijing Sinovac Biological Technology Co., Ltd.), a PRC company

Sinovac (Dalian) Vaccine Technology Co., Ltd., a PRC company

Sinovac Biomed Co., Ltd. (formerly known as Sinovac Zhong Yi Bio-pharmaceutical Co., Ltd.)

Exhibit 8.1

 
  
  
  
  
 
 
 
 
 
 
 
 
CERTIFICATION BY THE CHIEF EXECUTIVE OFFICER 
PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 

Exhibit 12.1

I, Weidong Yin, certify that: 

1.

I have reviewed this annual report on Form 20-F of Sinovac Biotech Ltd. (the “Company”);

2. Based  on  my  knowledge,  this  report  does  not  contain  any  untrue  statement  of  a  material  fact  or  omit  to  state  a  material  fact  necessary  to  make  the
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial

condition, results of operations and cash flows of the Company as of, and for, the periods presented in this report;

4. The Company’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange
Act  Rules  13a-15(e)  and  15d-15(e))  and  internal  control  over  financial  reporting  (as  defined  in  Exchange  Act  Rules  13a-15(f)  and  15d-15(f))  for  the
Company and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure
that  material  information  relating  to  the  Company,  including  its  consolidated  subsidiaries,  is  made  known  to  us  by  others  within  those  entities,
particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to
provide  reasonable  assurance  regarding  the  reliability  of  financial  reporting  and  the  preparation  of  financial  statements  for  external  purposes  in
accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the Company’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of

the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the Company’s internal control over financial reporting that occurred during the period covered by this annual

report that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting; and

5. The  Company’s  other  certifying  officer  and  I  have  disclosed,  based  on  our  most  recent  evaluation  of  internal  control  over  financial  reporting,  to  the

Company’s auditors and the audit committee of the Company’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely

to adversely affect the Company’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Company’s internal control over

financial reporting.

Date: April 25, 2016

/s/ Weidong Yin

By:
Name: Weidong Yin
Title:

Chief Executive Officer

 
  
  
  
  
  
  
  
  
  
  
  
  
  
 
  
 
 
CERTIFICATION BY THE CHIEF FINANCIAL OFFICER 
PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 

Exhibit 12.2

I, Nan Wang, certify that: 

1.

I have reviewed this annual report on Form 20-F of Sinovac Biotech Ltd. (the “Company”);

2. Based  on  my  knowledge,  this  report  does  not  contain  any  untrue  statement  of  a  material  fact  or  omit  to  state  a  material  fact  necessary  to  make  the
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial

condition, results of operations and cash flows of the Company as of, and for, the periods presented in this report;

4. The Company’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange
Act  Rules  13a-15(e)  and  15d-15(e))  and  internal  control  over  financial  reporting  (as  defined  in  Exchange  Act  Rules  13a-15(f)  and  15d-15(f))  for  the
Company and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure
that  material  information  relating  to  the  Company,  including  its  consolidated  subsidiaries,  is  made  known  to  us  by  others  within  those  entities,
particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to
provide  reasonable  assurance  regarding  the  reliability  of  financial  reporting  and  the  preparation  of  financial  statements  for  external  purposes  in
accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the Company’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of

the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the Company’s internal control over financial reporting that occurred during the period covered by this annual

report that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting; and

5. The  Company’s  other  certifying  officer  and  I  have  disclosed,  based  on  our  most  recent  evaluation  of  internal  control  over  financial  reporting,  to  the

Company’s auditors and the audit committee of the Company’s board of directors (or persons performing the equivalent functions):

(c) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely

to adversely affect the Company’s ability to record, process, summarize and report financial information; and

(a) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Company’s internal control over

financial reporting.

Date: April 25, 2016

By:
Name:
Title:

/s/ Nan Wang
 Nan Wang
Chief Financial Officer

 
  
  
  
  
  
  
  
  
  
  
  
  
  
 
  
 
 
CERTIFICATION BY THE CHIEF EXECUTIVE OFFICER 

PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 

Exhibit 13.1

In connection with the annual report of Sinovac Biotech Ltd. (the “Company”) on Form 20-F for the year ended December 31, 2015 as filed with the Securities
and Exchange Commission on the date hereof (the “Report”), I, Weidong Yin, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section
1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge: 

(1) The Report containing the financial statements fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: April 25, 2016

/s/ Weidong Yin

By:
Name: Weidong Yin
Title:

Chief Executive Officer

 
  
  
  
  
  
  
 
 
CERTIFICATION BY THE CHIEF FINANCIAL OFFICER 
PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 

Exhibit 13.2

In connection with the annual report of Sinovac Biotech Ltd. (the “Company”) on Form 20-F for the year ended December 31, 2015 as filed with the Securities
and Exchange Commission  on  the date  hereof (the “Report”),  I,  Nan  Wang, Chief  Financial  Officer of  the Company,  certify, pursuant to 18  U.S.C.  Section
1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge: 

(1) The Report containing the financial statements fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: April 25, 2016

/s/ Nan Wang

By:
Name: Nan Wang
Title:

Chief Financial Officer

 
  
  
  
  
  
  
 
 
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM   

We consent to the incorporation by reference in the following Registration Statements: 

i) Registration Statement (Form S-8 No. 333-161827) pertaining to Sinovac Biotech Ltd.’s 2003 Stock Option Plan; and

ii) Registration Statement (Form S-8 No. 333-190980) pertaining to Sinovac Biotech Ltd.’s 2012 Share Incentive Plan; 

of our reports dated April 25, 2016, with respect to the consolidated financial statements of Sinovac Biotech Ltd. and the effectiveness of internal control over
financial reporting of Sinovac Biotech Ltd., included in this Annual Report (Form 20-F) of Sinovac Biotech Ltd. for the year ended December 31, 2015. 

Exhibit 15.1

/s/ Ernst & Young Hua Ming LLP

Beijing, The People’s Republic of China 

April 25, 2016