Mustang Bio Reports Full-Year 2020 Financial Results and Recent Corporate Highlights

March 24, 2021 4:30 PM EDT

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NEW YORK, March 24, 2021 (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 full year ended December 31, 2020.

Manuel Litchman, M.D., President and Chief Executive Officer of Mustang, said, “We are excited by the progress across our cell and gene therapy programs in 2020. Notably, MB-106 (CD20-targeted, autologous CAR T cell therapy) data were presented at the 62nd American Society of Hematology (“ASH”) Annual Meeting which showed a favorable safety profile and clinical activity, with an 89% overall response rate and 44% complete response rate in patients with relapsed or refractory B-cell non-Hodgkin lymphomas who were treated with the modified cell manufacturing process. In August, we initiated an open-label, multicenter Phase 1/2 clinical trial to evaluate the safety and efficacy of MB-102 (CD123-targeted CAR T cell therapy) in patients with relapsed or refractory blastic plasmacytoid dendritic cell neoplasm (“BPDCN”). In October, initial Phase 1 data on MB-105, a PSCA-targeted CAR T cell therapy administered systemically to patients with PSCA-positive metastatic castration-resistant prostate cancer (“mCRPC”), demonstrated a 94% reduction in prostate-specific antigen, near complete reduction of measurable soft tissue metastasis by computerized tomography, and improvement in bone metastases by magnetic resonance imaging in a 73-year-old male patient with PSCA-positive mCRPC who failed eight prior therapies.”

Dr. Litchman continued, “In 2021, we anticipate multiple potential data disclosures from our collaborators’ clinical trials, and we plan to have four open Mustang Investigational New Drug (“IND”) applications. We look forward to advancing our lentiviral gene therapy clinical program for the treatment of X-linked severe combined immunodeficiency (“XSCID”), also known as bubble boy disease. In the second quarter, we plan to begin enrollment on our pivotal multicenter Phase 2 trial of MB-107 in newly diagnosed infants with XSCID who are under the age of two and submit an IND application for a pivotal multicenter Phase 2 trial of MB-207 for the treatment of patients with XSCID who were previously treated with hematopoietic stem cell transplant (“HSCT”) and for whom re-treatment is indicated. With a robust pipeline of therapies addressing highly challenging diseases, world-class R&D collaborators, a state-of-the-art cell processing facility and an experienced team, I believe we are very well positioned to continue building a fully integrated cell and gene therapy company.”

Financial Results:

  • As of December 31, 2020, Mustang’s cash and cash equivalents and restricted cash totaled $98.8 million, compared to $62.4 million as of December 31, 2019, an increase of $36.4 million year-to-date.
  • Research and development expenses were $37.2 million for the year ended December 31, 2020. This compares to $30.0 million for 2019. Non-cash, stock-based compensation expenses included in research and development were $1.4 million for the year ended December 31, 2020, compared to $0.9 million for 2019.
  • Research and development expenses from license acquisitions totaled $10.1 million for the year ended December 31, 2020, compared to $6.3 million for 2019. Non-cash, stock-based compensation expenses included in research and development – licenses acquired were $7.6 million for the year ended December 31, 2020, compared to $4.9 million for 2019.
  • General and administrative expenses were $9.5 million for the year ended December 31, 2020. This compares to $9.6 million for 2019. Non-cash, stock-based compensation expenses included in general and administrative expenses were $4.0 million for the year ended December 31, 2020, compared to $3.4 million for 2019.
  • Net loss attributable to common stockholders was $60.0 million, or $1.14 per share, for the year ended December 31, 2020, compared to a net loss attributable to common stockholders of $46.4 million, or $1.29 per share, for 2019.

2020 and Recent Corporate Highlights:

  • In February 2020, Mustang announced that the first subject treated with the modified MB-106 (CD20-targeted, autologous CAR T cell therapy) manufacturing process, developed in collaboration between Mustang Bio and the Fred Hutchinson Cancer Research Center (“Fred Hutch”), 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 and chronic lymphocytic leukemia.
  • In April 2020, Mustang announced that the European Medicines Agency (“EMA”) granted Advanced Therapy Medicinal Product (“ATMP”) classification to MB-107, a lentiviral gene therapy for the treatment of newly diagnosed infants with XSCID.
  • In May 2020, Mustang submitted an IND with the U.S. Food and Drug Administration (“FDA”) to initiate a pivotal multicenter Phase 2 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 HSCT. The primary efficacy endpoint will be event-free survival.
  • Also in May 2020, City of Hope presented two posters pertaining to MB-104, an innovative CS1 CAR T cell therapy, at the virtual 23rd Annual Meeting of the American Society of Gene & Cell Therapy.
  • In June 2020, Mustang raised gross proceeds of approximately $37.2 million in an underwritten public offering of common stock, including the exercise of the underwriter’s option.
  • In August 2020, Mustang announced that the FDA granted Rare Pediatric Disease Designations to MB-107 for the treatment of XSCID in newly diagnosed infants and to MB-207 for the treatment of XSCID in patients who were previously treated with HSCT and for whom re-treatment is indicated.
  • In September 2020, Mustang announced that the FDA granted Orphan Drug Designations to MB-107 for the treatment of XSCID in newly diagnosed infants and to MB-207 for the treatment of XSCID in patients who were previously treated with HSCT and for whom re-treatment is indicated.
  • In October 2020, Mustang announced that the first patient was dosed in a Mustang-sponsored, open-label, multicenter Phase 1/2 clinical trial to evaluate the safety and efficacy of MB-102 (CD123-targeted CAR T cell therapy) in patients with relapsed or refractory BPDCN.
  • Also in October 2020, Mustang announced that initial Phase 1 data on MB-105, a PSCA-targeted CAR T cell therapy administered systemically to patients with PSCA-positive mCRPC, were presented by City of Hope at the virtual 27th Annual Prostate Cancer Foundation Scientific Retreat. A 73-year-old male patient with PSCA-positive mCRPC was treated with MB-105 and lymphodepletion (a standard CAR T pre-conditioning regimen) after failing eight prior therapies. On day 28 of the patient’s treatment, MB-105 demonstrated a 94% reduction in prostate-specific antigen, near complete reduction of measurable soft tissue metastasis by computerized tomography, and improvement in bone metastases by magnetic resonance imaging.
  • Additionally, in October 2020, Mustang in-licensed LentiBOOST™ technology from SIRION Biotech GmbH for the development of MB-207.
  • In November 2020, Mustang signed an agreement with Minaris Regenerative Medicine GmbH to enable technology transfer and GMP clinical manufacturing of the MB-107 lentiviral gene therapy program for the treatment of XSCID in Europe.
  • Also in November 2020, Mustang announced that the European Commission issued a positive opinion on its application for Orphan Drug Designation for MB-107.
  • In December 2020, Mustang announced positive interim Phase 1/2 data on MB-106 for patients with relapsed or refractory B-cell non-Hodgkin lymphomas, which were presented at the 62nd ASH Annual Meeting. The data demonstrated an extremely favorable safety profile and clinical activity with an 89% overall response rate and 44% complete response rate over 4 dose levels in 9 patients treated with the modified cell manufacturing process.
  • Also in December 2020, Mustang announced that a Phase 1 single-center, two-arm clinical trial was initiated to establish the safety and feasibility of administering MB-101 to patients with leptomeningeal brain tumors (e.g., glioblastoma, ependymoma or medulloblastoma).
  • In February 2021, Mustang announced encouraging MB-107 and MB-207 clinical updates from its investigator-IND XSCID trials, as well as additional consistent safety and efficacy data. On January 28, 2021, the FDA removed a CMC hold on the MB-107 Phase 2 clinical trial IND application after reviewing a comprehensive CMC package that was submitted by Mustang in late December 2020. The company expects to enroll the first patient in this pivotal multicenter trial in the second quarter of 2021 and is targeting topline data from the trial in the second half of 2022. The company also expects to file an IND in the second quarter of 2021 for its pivotal multicenter Phase 2 clinical trial of MB-207.

About Mustang BioMustang 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 StatementsThis 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, and we claim the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995.

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

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

Media Relations Contact:Tony Plohoros6 Degrees(908) 591-2839tplohoros@6degreespr.com  

MUSTANG BIO, INC.Balance Sheets (in thousands, except for share and per share amounts)

      
 December 31,  December 31, 
 2020    2019
     
ASSETS     
Current Assets:     
Cash and cash equivalents$97,804  $61,413 
Other receivables - related party 15   19 
Prepaid expenses and other current assets 1,715   1,631 
Total current assets 99,534   63,063 
      
Property, plant and equipment, net 7,529   6,779 
Fixed assets - construction in process 499   1,157 
Restricted cash 1,000   1,000 
Other assets 250   250 
Operating lease right-of-use asset, net 1,088   1,196 
Total Assets$109,900  $73,445 
      
LIABILITIES AND STOCKHOLDERS’ EQUITY     
Current Liabilities:     
Accounts payable and accrued expenses$8,747  $5,668 
Payables and accrued expenses - related party 490   596 
Short-term notes payable    1,250 
Operating lease liabilities - short-term 278   257 
Total current liabilities 9,515   7,771 
      
Notes payable    12,179 
Operating lease liabilities - long-term 1,950   1,843 
Total Liabilities 11,465   21,793 
      
Commitments and Contingencies     
      
Stockholders’ Equity     
Preferred stock ($0.0001 par value), 2,000,000 shares authorized, 250,000 shares of Class A preferred stock issued and outstanding as of December 31, 2020 and December 31, 2019, respectively     
Common Stock ($0.0001 par value), 125,000,000 shares authorized     
Class A common shares, 845,385 shares issued and outstanding as of December 31, 2020 and December 31, 2019, respectively     
Common shares, 70,920,693 and 39,403,519 shares issued and outstanding as of December 31, 2020 and December 31, 2019, respectively 7   4 
Common stock issuable, 2,103,122 and 1,206,667 shares as of December 31, 2020 and December 31, 2019, respectively 7,939   4,923 
Additional paid-in capital 275,963   172,184 
Accumulated deficit (185,474)  (125,459)
Total Stockholders’ Equity 98,435   51,652 
Total Liabilities and Stockholders’ Equity$109,900  $73,445 
      

MUSTANG BIO, INC.Statements of Operations (in thousands, except for share and per share amounts)

      
 For the year ended December 31, 
 2020    2019
Operating expenses:     
Research and development$37,237  $30,042 
Research and development – licenses acquired 10,064   6,273 
General and administrative 9,505   9,570 
Total operating expenses 56,806   45,885 
Loss from operations (56,806)  (45,885)
      
Other income (expense)     
Interest income 708   1,263 
Interest expense (3,917)  (1,767)
Total other income (expense) (3,209)  (504)
Net Loss$(60,015) $(46,389)
      
Net loss per common share outstanding, basic and diluted$(1.14) $(1.29)
      
Weighted average number of common shares outstanding, basic and diluted 52,588,781   36,061,811 

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Source: Mustang Bio, Inc.


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