Athersys, Inc. (NASDAQ:ATHX), a cell therapy and regenerative medicine company developing MultiStem^® (invimestrocel) for critical care indications, announced today it will host a business update conference call on August 9, 2023, at 4:30 p.m. Eastern Time. Dan Camardo, Chief Executive Officer, Maia Hansen, Chief Operating Officer, Kasey Rosado, Interim Chief Financial Officer, and Willie Mays, Executive Vice President of Regenerative Medicine and Head of Neuroscience, will provide an overview of the Company's recent clinical and operational progress and discuss timing to conduct an interim analysis with MASTERS-2, a Phase 3 pivotal trial of MultiStem treatment in ischemic stroke.

Date	August 9, 2023
Time	4:30 p.m. (Eastern Time)
Live conference call registration	Call registration link

In lieu of a live question and answer session, management encourages participants to submit questions in advance to ir@athersys.com. A replay of the event will be available under the Investors section on the Athersys website www.athersys.com.

About MultiStem^®

MultiStem^® (invimestrocel) cell therapy is a patented regenerative medicine product in clinical development that has shown the ability to promote tissue repair and healing in a variety of ways, such as through the production of therapeutic factors in response to signals of inflammation and tissue damage. MultiStem therapy's potential for multidimensional therapeutic impact distinguishes it from traditional biopharmaceutical therapies focused on a single mechanism of benefit. The therapy represents a unique "off-the-shelf" stem cell product that can be manufactured in a scalable manner, may be stored for years in frozen form, and is administered without tissue matching or the need for immune suppression. Based upon its efficacy profile, its novel mechanisms of action, and a favorable and consistent tolerability demonstrated in clinical studies, we believe that MultiStem therapy could provide a meaningful benefit to patients, including those suffering from serious diseases and conditions with unmet medical need.

About Athersys

Athersys is a biotechnology company engaged in the discovery and development of therapeutic product candidates designed to extend and enhance the quality of human life. The Company is developing its MultiStem^® cell therapy product, a patented, adult-derived "off-the-shelf" stem cell product, initially for disease indications in the neurological, inflammatory and immune, and other critical care indications and has several ongoing clinical trials evaluating this potential regenerative medicine product. Athersys has forged strategic partnerships and a broad network of collaborations to further advance MultiStem cell therapy toward commercialization. Investors and others should note that we may post information about the Company on our website at www.athersys.com and/or on our accounts on Twitter, Facebook, LinkedIn or other social media platforms. It is possible that the postings could include information deemed to be material information. Therefore, we encourage investors, the media and others interested in the Company to review the information we post on our website at www.athersys.com and on our social media accounts. Follow Athersys on Twitter at www.twitter.com/athersys. Information that we may post about the Company on our website and/or on our accounts on Twitter, Facebook, LinkedIn or other social media platforms may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that involve risks and uncertainties. You should not place undue reliance on forward-looking statements contained on our website and/or on our accounts on Twitter, Facebook, LinkedIn or other social media platforms, and we undertake no obligation to publicly update forward-looking statements, whether as a result of new information, future events or otherwise.

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Athersys to Host Business Update Conference Call on August 9th