Mustang Bio Reports First Quarter 2020 Financial Results and Recent Corporate Highlights

WORCESTER, Mass., May 11, 2020 (GLOBE NEWSWIRE) -- Mustang Bio, Inc. (“Mustang”) (NASDAQ: MBIO), a clinical-stage biopharmaceutical company focused on translating today’s medical breakthroughs in cell and gene therapies into potential cures for hematologic cancers, solid tumors and rare genetic diseases, today announced financial results and recent corporate highlights for the first quarter ended March 31, 2020.

Manuel Litchman, M.D., President and Chief Executive Officer of Mustang, said, “We were pleased to announce several important milestones in the first few months of 2020. Most notably, we were excited to submit our Investigational New Drug (“IND”) application with the U.S. Food and Drug Administration (“FDA") for MB-107, our lentiviral gene therapy for the treatment of X-linked severe combined immunodeficiency (“XSCID”), also known as bubble boy disease, and we look forward to commencing a multi-center Phase 2 clinical trial in newly diagnosed infants with XSCID under the age of two. We also anticipate filing a second IND in the third quarter of this year for a multi-center trial for the treatment of previously transplanted XSCID patients. Additionally, the European Medicines Agency (“EMA”) granted Advanced Therapy Medicinal Product (“ATMP”) classification to MB-107, which is an important step in establishing our path to market approval and commercialization in Europe.”

“Among our other first quarter accomplishments was the complete response achieved at the lowest dose level in the first subject treated following process optimization in our Phase 1/2 clinical trial of MB-106, our CD20-targeted, autologous CAR T cell therapy, for patients with relapsed or refractory B-cell non-Hodgkin lymphomas. This trial is ongoing, and we hope to announce additional interim data later this year. We are also very pleased to report that MB-105, a PSCA-directed CAR T currently under investigation in a Phase 1 trial at City of Hope, appeared to be active in the first patient to receive the therapy following a standard CAR T conditioning regimen. As we progress through 2020, we look forward to advancing our gene and CAR T cell therapies toward additional potentially value-creating regulatory and clinical milestones in the months ahead,” Dr. Litchman concluded.

Recent Corporate Highlights:

• In May 2020, Mustang submitted an IND application with the FDA to initiate a multi-center Phase 2 clinical trial of MB-107 in newly diagnosed infants with XSCID who are under the age of two. The trial is expected to enroll 10 patients who, together with 15 patients enrolled in the current multicenter trial led by St. Jude Children’s Research Hospital, will be compared with 25 matched historical control patients who have undergone hematopoietic stem cell transplant (“HSCT”). The primary efficacy endpoint will be event-free survival. The initiation of this trial is currently on hold pending CMC clearance by the FDA. Mustang is targeting topline data from the trial in the second half of 2022.
• Mustang further expects to file an IND in the third quarter of 2020 for a registrational multi-center Phase 2 clinical trial of its lentiviral gene therapy in previously transplanted XSCID patients. This product will be designated MB-207. Mustang anticipates enrolling 20 patients and comparing them to matched historical control patients who have undergone a second HSCT. Mustang is targeting topline data for this trial in the second half of 2022.
• In the ongoing Phase 1 trial at City of Hope with MB-105, a PSCA-directed CAR T administered systemically to patients with PSCA-positive castration resistant prostate cancer, the first patient to receive the therapy following a standard CAR T conditioning regimen experienced a significant reduction in his prostate-specific antigen (“PSA”) at day 28.  This PSA response was associated with radiographic improvement of the patient’s metastatic disease.
• In April 2020, Mustang announced that the EMA granted ATMP classification to MB-107 for the treatment of XSCID.
• In February 2020, Mustang announced that the first subject treated with the optimized MB-106 (CD20-targeted, autologous CAR T cell therapy) manufacturing process, developed in collaboration between Mustang and Fred Hutchinson Cancer Research Center, achieved a complete response at the lowest starting dose in an ongoing Phase 1/2 clinical trial. The trial is evaluating the safety and efficacy of MB-106 in subjects with relapsed or refractory B-cell non-Hodgkin lymphomas.

Financial Results:

• As of March 31, 2020, Mustang’s cash, cash equivalents and restricted cash totaled $56.8 million, compared to $62.4 million as of December 31, 2019, a decrease of $5.6 million for the first quarter.
• Research and development expenses were $9.3 million for the first quarter of 2020. This compares to $7.0 million for the first quarter of 2019. Non-cash, stock-based compensation expenses included in research and development were $0.4 million for the first quarter of 2020, compared to $0.1 million for the first quarter of 2019.
• Research and development expenses from license acquisitions totaled $0.3 million for the first quarter of 2020, compared to $0.5 million for the first quarter of 2019.
• General and administrative expenses were $2.0 million for the first quarter of 2020. This compares to $2.3 million for the first quarter of 2019. Non-cash, stock-based compensation expenses included in general and administrative expenses were $0.4 million for the first quarter of 2020, compared to $0.7 million for the first quarter of 2019.
• Net loss attributable to common stockholders was $11.9 million, or $0.28 per share, for the first quarter of 2020, compared to a net loss attributable to common stockholders of $9.6 million, or $0.34 per share, for the first quarter of 2019.

About Mustang Bio
Mustang Bio, Inc. is a clinical-stage biopharmaceutical company focused on translating today’s medical breakthroughs in cell and gene therapies into potential cures for hematologic cancers, solid tumors and rare genetic diseases. Mustang aims to acquire rights to these technologies by licensing or otherwise acquiring an ownership interest, to fund research and development, and to outlicense or bring the technologies to market. Mustang has partnered with top medical institutions to advance the development of CAR T therapies across multiple cancers, as well as a lentiviral gene therapy for XSCID. Mustang is registered under the Securities Exchange Act of 1934, as amended, and files periodic reports with the U.S. Securities and Exchange Commission (“SEC”). Mustang was founded by Fortress Biotech, Inc. (NASDAQ: FBIO). For more information, visit www.mustangbio.com.

Forward‐Looking Statements
This press release may contain “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, each as amended. Such statements include, but are not limited to, any statements relating to our growth strategy and product development programs and any other statements that are not historical facts. Forward-looking statements are based on management’s current expectations and are subject to risks and uncertainties that could negatively affect our business, operating results, financial condition and stock value. Factors that could cause actual results to differ materially from those currently anticipated include: risks relating to our growth strategy; our ability to obtain, perform under, and maintain financing and strategic agreements and relationships; risks relating to the results of research and development activities; risks relating to the timing of starting and completing clinical trials; uncertainties relating to preclinical and clinical testing; our dependence on third-party suppliers; our ability to attract, integrate and retain key personnel; the early stage of products under development; our need for substantial additional funds; government regulation; patent and intellectual property matters; competition; as well as other risks described in our SEC filings. We expressly disclaim any obligation or undertaking to release publicly any updates or revisions to any forward-looking statements contained herein to reflect any change in our expectations or any changes in events, conditions or circumstances on which any such statement is based, except as required by law.

Company Contacts:
Jaclyn Jaffe and William Begien
Mustang Bio, Inc.
(781) 652-4500
ir@mustangbio.com

Investor Relations Contact:
Daniel Ferry
LifeSci Advisors, LLC
(617) 430-7576
daniel@lifesciadvisors.com

Media Relations Contact:
Tony Plohoros
6 Degrees
(908) 591-2839
tplohoros@6degreespr.com  

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Released May 11, 2020