CLEVELAND - Athersys, Inc. (NASDAQ: ATHX) today announced financial results for the three and 12 months ended December 31, 2022, and provided a business update.

Fourth Quarter 2022 and Recent Corporate and Operational Highlights

Largely completed the company's restructuring initiative with the goal of significantly reducing expenses, conserving cash, improving focus and making Athersys more attractive to potential financial and strategic partners

Reduced operating expenses below $3 million per month, compared with $7 million per month a year ago

Reduced headcount by 70% to 20 FTEs currently

Closed ReGenesys, Athersys' animal health-focused division based in Belgium, and sold all related equipment

Initiated efforts to sublet the Stow, Ohio facility

Reduced and streamlined internal research functions to focus on the pivotal Phase 3 MASTERS-2 clinical trial in ischemic stroke

Appointed experienced biotechnology and pharmaceutical executive Joseph Nolan to the Board of Directors

Raised gross proceeds of $5.5 million in a public offering

Completed enrollment in cohorts 1 and 2 of MATRICS-1, the investigator-initiated Phase 2 trial evaluating MultiStem in patients following resuscitation from hemorrhagic trauma

Announced participation in a Request for Proposal process with the Biomedical Advanced Research and Development Authority (BARDA) to explore the use of MultiStem for acute respiratory distress syndrome (ARDS) and other COVID-19 co-morbidities

Healios announced regulatory agreement on the outline for a clinical trial in Japan with HLCM051 (MultiStem) in patients with pneumonia-induced ARDS, including in patients with COVID-19

Granted first U.S. patent for the SIFU ultracold storage technology

MASTERS-2

Announced planned amendments to MASTERS-2 clinical trial protocol following a successful Type B meeting with the U.S. Food & Drug Administration (FDA)

Proposed modifications establish primary and secondary endpoints that best reflect the full potential benefit of MultiStem treatment for patients with acute, moderate-to-severe ischemic stroke as well as the evolving standard of care

Primary endpoint will become mRS shift analysis at Day 365

Convened a meeting of stroke Key Opinion Leaders (KOLs) to discuss potential changes to the MASTERS-2 trial design, given clinical findings from Healios' TREASURE trial in Japan and comparing data results from our Phase 2 MASTERS-1 study

Exceeded 50% enrollment in MASTERS-2 and significantly increased the rate of patient enrollment due in part to increased trial site engagement and opening new sites across more geographies, with more sites expected to be activated throughout 2023

Three sites in the U.S. and eight or nine sites in Europe are expected to be activated in the first half of 2023

Management Commentary

'Last year was a transformative year for Athersys that required us to evaluate every aspect of our business,' said Dan Camardo, Chief Executive Officer of Athersys. 'We have worked diligently to reduce the company's historically large cash burn while prioritizing areas where we can deliver the highest value to patients and shareholders. With a leaner organization, key management and board appointments, and reduced expenses, we entered 2023 in a far stronger position.'

'We remain focused on advancing MASTERS-2 in ischemic stroke and look forward to meeting with FDA and EMA regulators later this month to discuss insights gained from the TREASURE trial conducted in Japan. We also continue to engage with potential global and regional partners to advance MultiStem in ischemic stroke and other potential early-stage indications,' he added. 'We look forward to updating shareholders throughout the year via public disclosures and periodic business update calls.'

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.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that involve risks and uncertainties. These forward-looking statements relate to, among other things, the expected timetable for development of our product candidates, our growth strategy, and our future financial performance, including our operations, economic performance, financial condition, prospects, and other future events. We have attempted to identify forward-looking statements by using such words as 'anticipates,' 'believes,' 'can,' 'continue,' 'could,' 'estimates,' 'expects,' 'intends,' 'may,' 'plans,' 'potential,' 'should,' 'suggest,' 'will,' or other similar expressions. These forward-looking statements are only predictions and are largely based on our current expectations. In addition, a number of known and unknown risks, uncertainties, and other factors could affect the accuracy of these statements. Some of the more significant known risks that we face are the risk that we will be unable to raise capital to fund our operations in the near term and long term, including our ability to obtain funding through public or private equity offerings, debt financings, collaborations and licensing arrangements or other sources, on terms acceptable to us or at all, and to continue as a going concern and our ability to successfully resolve the payment issues with our primary contract manufacturer and gain access to our clinical product. The following risks and uncertainties may cause our actual results, levels of activity, performance, or achievements to differ materially from any future results, levels of activity, performance, or achievements expressed or implied by these forward-looking statements: our ability to raise capital to fund our operations in the near term and long term, including our ability to obtain funding through public or private equity offerings, debt financings, collaborations and licensing arrangements or other sources, on terms acceptable to us or at all, and to continue as a going concern; our ability to successfully license our SIFU technology; our ability to successfully resolve the payment issues with our primary contract manufacturer and gain access to our clinical product our collaborators' ability and willingness to continue to fulfill their obligations under the terms of our collaboration agreements and generate sales related to our technologies; the possibility of unfavorable results from ongoing and additional clinical trials involving MultiStem; the risk that positive results in a clinical trial may not be replicated in subsequent or confirmatory trials or success in an early stage clinical trial may not be predictive of results in later stage or large scale clinical trials; our ability to regain compliance with the Nasdaq continued listing requirements; the timing and nature of results from MultiStem clinical trials, including the MASTERS-2 Phase 3 clinical trial evaluating the administration of MultiStem for the treatment of ischemic stroke and the effect of amendments to its clinical trial protocol; our ability to meet milestones and earn royalties under our collaboration agreements, including the success of our collaboration with Healios; the success of our MACOVIA clinical trial evaluating the administration of MultiStem for the treatment of ARDS induced by COVID-19 and other pathogens, and the MATRICS-1 clinical trial being conducted with The University of Texas Health Science Center at Houston evaluating the treatment of patients with serious traumatic injuries; the availability of product sufficient to meet our clinical needs and potential commercial demand following any approval; the possibility of delays in, adverse results of, and excessive costs of the development process; our ability to successfully initiate and complete clinical trials of our product candidates; the possibility of delays, work stoppages or interruptions in manufacturing by third parties or us, such as due to material supply constraints, contamination, operational restrictions due to COVID-19 or other public health emergencies, labor constraints, regulatory issues or other factors that could negatively impact our trials and the trials of our collaborators; uncertainty regarding market acceptance of our product candidates and our ability to generate revenues, including MultiStem cell therapy for neurological, inflammatory and immune, cardiovascular and other critical care indications; changes in external market factors; changes in our industry's overall performance; changes in our business strategy; our ability to protect and defend our intellectual property and related business operations, including the successful prosecution of our patent applications and enforcement of our patent rights, and operate our business in an environment of rapid technology and intellectual property development; our possible inability to realize commercially valuable discoveries in our collaborations with pharmaceutical and other biotechnology companies; the success of our efforts to enter into new strategic partnerships and advance our programs; our possible inability to execute our strategy due to changes in our industry or the economy generally; changes in productivity and reliability of suppliers; the success of our competitors and the emergence of new competitors and the risks mentioned elsewhere in our Annual Report on Form 10-K for the year ended December 31, 2022 under Item 1A, 'Risk Factors' and our other lings with the SEC.

Contact:

Tirth T. Patel

Tel: 212-201-6614

Email: tpatel@lhai.com

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