Osiris Therapeutics, Inc. (NASDAQ: OSIR), the leading cellular and regenerative medicine company focused on developing and marketing products to treat conditions in wound care, orthopaedics and sports medicine, announced today that its Board of Directors declared a cash dividend of $0.20 per share of common stock, payable on October 30, 2015 to stockholders of record as of October 16, 2015.

"We are confident in the financial strength of our business and pleased to provide this special dividend to our shareholders," said Lode Debrabandere, Ph.D., President and Chief Executive Officer. “The past year was marked by Osiris’ significant transformation into a commercial enterprise, with three products successfully launched and a rich pipeline of new products to be launched within the next year. This announcement reflects Osiris’ confidence in our financial future and gratitude to our long-term shareholders.”

About Osiris Therapeutics

Osiris Therapeutics, Inc., based in Columbia, Maryland, is the world leader in researching, developing and marketing regenerative medicine products that improve health and lives of patients and lower overall healthcare costs. Having developed the world’s first approved stem cell drug, the company continues to advance its research and development in biotechnology by focusing on innovation in regenerative medicine – including bioengineering, stem cell research and viable tissue based products. Osiris has achieved commercial success with products in orthopaedics, sports medicine and wound care, including BIO4, Cartiform® and Grafix®.

Osiris, Grafix and Cartiform are registered trademarks of Osiris Therapeutics, Inc. BIO4 is a trademark of Stryker Corporation (NYSE: SYK). More information can be found on the company's website, www.Osiris.com. (OSIR-G)

Forward-Looking Statements

This press release contains forward-looking statements. Forward-looking statements include statements about our expectations, beliefs, plans, objectives, intentions, assumptions and other statements that are not historical facts. Words or phrases such as "anticipate," "believe," "continue," "ongoing," "estimate," "expect," "intend," "may," "plan," "potential," "predict," "project" or similar words or phrases, or the negatives of those words or phrases, may identify forward-looking statements, but the absence of these words does not necessarily mean that a statement is not forward-looking. Examples of forward-looking statements may include, without limitation, statements regarding any of the following: our product development efforts; our clinical trials and anticipated regulatory requirements, and our ability to successfully navigate these requirements; the success of our product candidates in development; status of the regulatory process for our product and product candidates; implementation of our corporate strategy; our financial performance; our product research and development activities and projected expenditures, including our anticipated timeline and clinical strategy for marketed Biosurgery products (including Grafix, BIO4 and Cartiform) and Biosurgery products under development; our cash needs; patents, trademarks and other proprietary rights; the safety and ability of our products and potential products to address medical needs; our ability to supply a sufficient amount of our marketed products or product candidates and, if approved or otherwise commercially available, future products, to meet demand; our ability to commercialize and distribute our current and any future marketed products, including our ability and the ability of end users to obtain reimbursement from Medicare and other third party payors; our relationships with collaborating partners; our ability to maintain and benefit from our collaborative arrangements; our costs to comply with governmental regulations; our plans for sales and marketing; our plans regarding facilities; types of regulatory frameworks we expect will be applicable to our products and potential products; and results of our scientific research. Additional risks and uncertainties related to the prior sale of our ceMSC assets to Mesoblast include typical business transactional risks, the risk of changing relationships with customers, suppliers or employees, the risk associated with the disposition of our ceMSC assets and the increased relative dependence on and importance of our other business including our Biosurgery business, the risk that we may not be able to fully benefit from the transaction through milestone payments or royalties, payment risks, including the risk associated with receipt of equity as consideration, in lieu of cash, and the risk of dependence on others to achieve results upon which milestone or royalty payments to us are conditioned. In addition to all of the risks otherwise applicable to us and our business, there are numerous risks and uncertainties related to our collaborative relationships. For example, in the case of our Exclusive Service Agreement with Stryker for the commercialization of BIO4 these risks include, among others, typical business transactional risks, Stryker’s early termination rights, the ability of Stryker to successfully market and promote BIO4, the ability of Osiris to successfully fulfill its supply obligations, and the risk of dependence on others to generate sales of allograft services for BIO4. Forward-looking statements are subject to known and unknown risks and uncertainties and are based on potentially inaccurate assumptions that could cause actual results to differ materially from those expected or implied by the forward-looking statements. Our actual results could differ materially from those anticipated in forward-looking statements for many reasons, including the factors described in the section entitled "Risk Factors" in our Annual Report on Form 10-K and other Periodic Reports filed on Form 10-Q, with the United States Securities and Exchange Commission. Accordingly, you should not unduly rely on these forward-looking statements. We undertake no obligation to publicly revise any forward-looking statement to reflect circumstances or events after the date of this press release or to reflect the occurrence of unanticipated events.