Sinovac Reports Unaudited First Quarter 2016 Financial Results BEIJING

Sinovac Reports Unaudited First Quarter

2016 Financial Results

BEIJING, May 26, 2016 /PRNewswire/ --

Sinovac Biotech Ltd. (NASDAQ: SVA), a leading provider of biopharmaceutical products in China, announced today its unaudited

first quarter ended March 31, 2016.

First Quarter 2016 Financial Highlights

(compared to the first quarter of 2015)

Mr. Weidong Yin, Chairman, President and

CEO of the Sinovac, commented, "Our first quarter revenue increased by 19% from the prior year period, however, the revenue

increase was due to revenue recognition from sales of non-core H5N1 vaccine, which contributed 58% of total sales in the first

quarter. Other vaccine sales were lower because of the challenging environment in the Chinese vaccine industry. Business conditions

for vaccine manufacturers in China like Sinovac have become more difficult in recent months due to an incident involving the improper

distribution and sale of vaccines in Shandong province. As a result of this incident, China's State Council newly issued the Regulation

on the Administration of Circulation and Vaccination of Vaccines (the "Regulation"). The Regulation requires all the

vaccine sales in the private-pay market go through provincial tendering platform, prohibits distributors from selling vaccines,

sets higher standards to ensure cold-chain conditions for vaccine delivery and storage from the manufacturer to CDC customers at

county/district levels and requires vaccine manufacturing companies to be fully accountable for the product quality during the

distribution process. Currently, most of the provinces have yet to establish the platform, and a detailed interpretation and execution

plan associated with the Regulation has yet to be released by the central government, resulting in stagnated nationwide sales of

private-pay market vaccines. While Sinovac was not directly implicated in the incident, our sales performance has been negatively

affected and we also expect management and administration costs of vaccine distribution to increase in the future.

Mr. Yin added, "The Shandong incident

had a material effect on our revenues in the first quarter and we expect that this trend will continue into the second quarter.

Sinovac is well capitalized and the underlying need for vaccines has not changed. We have taken steps to manage our cash carefully,

including implementing a more stringent AR collection management scheme, ensuring commercial bank loans, and deferring non-core

R&D projects to better enable Sinovac to withstand this unusual event. At the same time we will closely monitor the market

conditions and the change of policy to prepare ourselves for full implementation once market conditions normalize. For long term,

we are well positioned to benefit from these industry changes once the vaccine market recovers as our past success has been to

primarily rely on our internal sales force instead of distributors, and we also expect to gain from the commercialization of our

newly approved EV71 vaccine, positioning Sinovac to be more competitive."

Mr. Yin added, "In the first quarter,

we initiated the production of our EV71 vaccine immediately after the vaccine was approved in January 2016. The EV71 vaccine produced

has passed the lot release test administered by the National Institute of Food and Drug Control and is now ready for market launch.

We expect to deliver the vaccine to customers once the market returns to normal. During the quarter, we have also made progress

on our pipeline programs with the initiation of clinical trials of our varicella vaccine and our preparation for the trials of

the sIPV vaccine. We will continue to keep our investors updated on our latest progress and achievements in the months ahead."

First Quarter 2016 Business Highlights

Research and Development

EV71 - The China Food and

Drug Administration (CFDA) issued the new drug certification and production license, as well as the Good Manufacturing Practices

("GMP") certificate for Sinovac's enterovirus 71 ("EV71") vaccine respectively at the end of December 2015

and January 2016. The Company already received lot release approval for EV71 vaccine and expects to launch the EV71 vaccine once

vaccine sales activity resume.

Varicella -The vaccine candidate

is expected to be studied through a phase I, a phase III trials and a batch-to-batch consistency trial of three consecutive batches.

The phase I clinical trial was initiated in May 2016 in Henan Province. The phase I trial is designed as a single-center, randomized,

double-blinded, and placebo controlled study. We expect to enroll approximately 270 healthy volunteers between the ages of 1 to

49 years old for the trial.

Results for First Quarter 2016

Quarterly sales from continuing operations

were $11.0 million, an increase of 19.0% from $9.2 million in the prior year period. The sales increase was primarily due to the

recognition of H5N1 revenue. Excluding H5N1 revenue, quarterly sales from continuing operations were $4.6 million, a decrease of

50.4% from $9.2 million in the comparative period. The decrease was primarily due to additional sales return provision provided

as a result of the vaccine incident in Shandong province.

Gross profit from continuing

operations was $6.3 million, a decrease of 8.3% from $6.9 million in the prior year period. Gross margin was 57.8%, compared

to 74.9% in the prior year period. Excluding H5N1, the quarterly gross margin was 55.6%, compared

to 74.9% in the prior year period. The decrease was mainly due to a higher inventory provision for mumps vaccines and a lower

gross profit for the hepatitis A&B vaccine due to higher sales returns provision provided in the first quarter of

Selling, general and administrative expenses

in the first quarter of 2016 were $6.2 million, compared to $6.8 million in the same period of 2015.

R&D expenses in the first quarter of

2016 were $2.1 million, compared to $2.2 million in the same period of 2015.

Loss from continuing operations was $1.6

million compared to a loss of $2.6 million in the prior year period. Income from discontinued operations was $2.3 million, compared

to a loss from discontinued operations of $192 thousand in the prior year period.

Net income attributable to common shareholders

was $1.3 million, or $0.02 per basic and diluted share, compared to net loss attributable to common shareholders of $2.3 million,

or $0.04 per basic and diluted share in the prior year period.

Non-GAAP EBITDA was $60 thousand in the

first quarter of 2016, compared to a loss of $212 thousand in the prior year period. Non-GAAP net loss from continuing operations

in the first quarter of 2016 was $1.4 million, a decrease of 45% compared to a net loss of $2.6 million in the prior year period.

Non-GAAP diluted net loss per share from continuing operations in the first quarter of 2016 was $0.01, compared to net loss of

$0.03 per share in the prior year period. Reconciliations of non-GAAP measures to the nearest comparable GAAP measures are included

at the end of this earnings announcement.

As of March 31, 2016, cash and cash equivalents

totaled $62.5 million, compared to $63.8 million as of December 31, 2015. In the first quarter of 2016, net cash used in operating

activities was $9.5 million. Net cash used in investing activities was $2.7 million, which was mainly for the purchase of equipment.

Net cash provided by financing activities was $10.7 million, including loan proceeds of $13.2 million and loan repayment of $2.6

million. As of March 31, 2016, the Company had $30.7 million of bank loans due within one year. The Company expects that its current

cash position will be able to support its operations for the next 12 months. The Company will seek new commercial bank loans to

finance the commercialization of its pipeline products and for other operational purposes when appropriate.

Conference Call Details

Sinovac will host a conference call on

Friday, May 27, 2016, at 8:00 a.m. EDT (Friday, May 27, 2016 at 8:00 p.m. China Standard Time) to review the Company's financial

results and provide an update on recent corporate developments.

To access the conference call, please dial

1-877-407-9039 (USA) or 1-201-689-8470 (International). A replay of the call will be available after the earnings call through

June 10, 2016. To access the replay, please dial 1-877-870-5176 (USA) or 1-858-384-5517 (International) and reference the replay

pin number 13638158.

Sinovac Biotech Ltd. is a China-based biopharmaceutical

company that focuses on the research, development, manufacturing, and commercialization of vaccines that protect against human

infectious diseases. Sinovac's product portfolio includes vaccines against hepatitis A and B, seasonal influenza, H5N1 pandemic

influenza (avian flu), H1N1 influenza (swine flu), mumps and canine rabies. In 2009, Sinovac was the first company worldwide to

receive approval for its H1N1 influenza vaccine, which it has supplied to the Chinese Government's vaccination campaign and stockpiling

program. The Company is also the only supplier of the H5N1 pandemic influenza vaccine to the government stockpiling program. Sinovac's

newly developed innovative vaccine against HFMD caused by EV71 is ready for market launch. The Company is currently developing

a number of new products including a Sabin-strain inactivated polio vaccine, pneumococcal polysaccharides vaccine, pneumococcal

conjugate vaccine and varicella vaccine. Sinovac primarily sells its vaccines in China, while also exploring growth opportunities