Dotinurad (Urate Transporter (URAT1) Inhibitor)

• Dotinurad is in development for the treatment of gout. We anticipate topline data from the Phase 1 trial to evaluate dotinurad in healthy volunteers in the United States in the second quarter of 2023 and expect to begin pivotal clinical trials in early 2024.

• Dotinurad (URECE® tablet) was approved in Japan in 2020 as a once-daily oral therapy for gout and hyperuricemia. Dotinurad was efficacious and well-tolerated in more than 500 Japanese patients treated for up to 58 weeks in Phase 3 clinical trials. The clinical program supporting approval included over 1,000 patients.

• Dotinurad was sourced by Fortress and is currently in development at Urica.
  

MB-106 (CD20-targeted CAR T Cell Therapy)

• Mustang Bio, Inc.’s (Nasdaq: MBIO) (“Mustang Bio”) lead clinical candidate is MB-106, a CD20-targeted, autologous CAR T cell therapy to treat relapsed or refractory B-NHL and CLL. MB-106 data to date include an overall response rate of 96% and complete response rate of 75% in a wide range of hematologic malignancies, including Waldenstrom macroglobulinemia (“WM”), in a clinical trial conducted by Mustang Bio’s collaborators at Fred Hutch. In parallel, Mustang Bio’s multicenter, open-label, non-randomized Phase 1/2 clinical trial evaluating the safety and efficacy of MB-106 continues to accrue, and Mustang Bio anticipates escalation to the final dose level in the Phase 1 indolent lymphoma arm in the third quarter of this year. The FDA granted Orphan Drug Designation to MB-106 for the treatment of WM, and Mustang Bio has treated the first WM patient in the indolent lymphoma arm of the trial. Results from this arm are expected to support an accelerated Phase 2 registration strategy for WM, with the first pivotal Phase 2 WM patient potentially to be treated in the first quarter of 2024. In the second quarter of this year, Mustang Bio plans to report safety and efficacy data from the indolent lymphoma arm.

• Phase 1/2 data from the Fred Hutch clinical trial on MB-106, a CD20-targeted, autologous CAR T cell therapy for patients with relapsed or refractory B-NHL and CLL, will be presented at the European Hematology Association Hybrid Congress (“EHA2023”) taking place June 8-11, 2023, in Frankfurt, Germany and at the International Conference on Malignant Lymphoma (“ICML”) taking place June 13-17, 2023, in Lugano, Switzerland. Data from the WM cohort were selected for poster presentation at EHA2023 and outpatient treatment of follicular lymphoma was selected for oral presentation at ICML.

• MB-106 was sourced by Fortress and is currently in development at Mustang Bio.
  

CUTX-101 (Copper Histidinate for Menkes disease)

• Our subsidiary, Cyprium Therapeutics, Inc. (“Cyprium”) has completed two pivotal studies in patients with Menkes disease treated with CUTX-101, copper histidinate (CuHis). In a pre-specified analysis of the studies, a 79% reduction in the risk of death was observed in patients treated within four weeks of birth, compared with a historical control cohort of untreated patients, and median overall survival (OS) was 177.1 months for CUTX-101 compared to 16.1 months for historical control, with a hazard ratio (HR) of (95% CI) = 0.208 (0.094, 0.463) p<0.0001. A 75% reduction in the risk of death was observed in patients treated after four weeks of birth, compared with untreated historical control subjects, and median OS was 62.4 and 17.6 months, respectively; HR (95% CI) = 0.253 (0.119, 0.537); p<0.0001.

• In 2021, Cyprium signed a Development and Asset Purchase Agreement with Sentynl Therapeutics, Inc. (“Sentynl”), a wholly owned subsidiary of Zydus Lifesciences Ltd., for CUTX-101 to treat Menkes disease. Cyprium is responsible for the development of CUTX-101, and Sentynl will be responsible for commercialization of CUTX-101, as well as progressing newborn screening activities.

• In December 2021, Cyprium initiated the rolling submission of an NDA to the FDA for CUTX-101, which is ongoing and expected to be completed by the end of 2023.

• Cyprium will retain 100% ownership over any FDA priority review voucher that may be issued at NDA approval of CUTX-101.

• CUTX-101 was sourced by Fortress and is currently in development at Cyprium.
  

CAEL-101 (Light Chain Fibril-reactive Monoclonal Antibody for AL Amyloidosis)

• On October 5, 2021, AstraZeneca plc (“AstraZeneca”) acquired Caelum Biosciences, Inc. (“Caelum”) for an upfront payment of approximately $150 million paid to Caelum shareholders, of which approximately $56.9 million was paid to Fortress, net of Fortress’ $6.4 million portion of the $15 million, 24-month escrow holdback amount and other miscellaneous transaction expenses. The agreement also provides for additional potential payments to Caelum shareholders totaling up to $350 million, payable upon the achievement of regulatory and commercial milestones. Fortress is eligible to receive 42.4% of all potential milestone payments, which, together with the upfront payment, would total up to approximately $212 million.

• There are two ongoing Phase 3 studies of CAEL-101 for AL amyloidosis. (ClinicalTrials.gov identifiers: NCT04512235 and NCT04504825).²

• AstraZeneca has estimated that it expects the FDA to accept its BLA submission for review during calendar year 2024.

• CAEL-101 (anselamimab) was sourced by Fortress and was developed by Caelum (founded by Fortress) until its acquisition by AstraZeneca in October 2021.

Triplex (Cytomegalovirus (“CMV”) vaccine)

• We expect that the Phase 2 clinical trial of Triplex for adults co-infected with HIV and CMV will complete enrollment in the second half of 2023 with topline data anticipated in 2024. The study aims to show potential reduction in intensity of highly active antiretroviral therapy treatment, which is used in up to 1.7 million treated HIV patients.

• Triplex received a grant from the National Institute of Allergy and Infectious Diseases that could provide over $20 million in non-dilutive funding. This will fund a 420 patient multi-center, placebo-controlled, randomized Phase 2 study of Triplex for control of CMV in patients undergoing liver transplantation and is expected to begin enrollment this year. We believe this data set could ultimately be used to support approval of Triplex in this setting.

• Triplex is currently the subject of three ongoing clinical trials including: pediatric patients undergoing stem cell transplant; adults co-infected with CMV and HIV; and in combination with a CAR T cell therapy for adults with NHL.

• Triplex was sourced by Fortress and is currently in development at our subsidiary, Helocyte, Inc.

AJ201

• In March 2023, we announced that our partner company, Avenue Therapeutics, Inc. (Nasdaq: ATXI) (“Avenue”), entered into an exclusive license agreement with AnnJi Pharmaceutical Co., Ltd. for intellectual property related to AJ201, a first-in-class clinical asset currently in a Phase 1b/2a study in the U.S. for the treatment of spinal and bulbar muscular atrophy, also known as Kennedy's Disease. Kennedy’s Disease is a debilitating rare genetic neuromuscular disease primarily affecting men. Although there is a range of cited prevalence rates in the literature, a recent study used genetic analysis to estimate disease prevalence of 1:6,887 males³.

• AJ201 was sourced by Fortress and is currently in development at Avenue.

IV Tramadol

• In March 2023, Avenue participated in a Type C meeting with the FDA to discuss the proposed study protocol to assess the risk of respiratory depression related to opioid stacking on IV Tramadol compared to IV morphine. The Type C meeting minutes from the FDA indicate that the FDA and Avenue are in agreement with a majority of the proposed protocol items and are in active discussion about remaining open items. The minutes indicate that the FDA also agrees that a successful study will support the submission of a complete response to the second Complete Response Letter for IV Tramadol pending final agreement on a statistical analysis plan and a full review of the submitted data in the complete response as well as concurrence from the Division of Anesthesia, Analgesia and Addiction Products.

• IV Tramadol was sourced by Fortress and is currently in development at Avenue.

In vivo CAR T Platform Technology

• We continue to collaborate with the Mayo Clinic to potentially revolutionize the delivery of CAR T in patients. The technology has the potential to generate CAR T cells within the patient’s body after two outpatient injections, without the need for traditional ex vivo allogeneic or autologous CAR T cell processing wait time and expense.

• We anticipate the publication of proof-of-concept research from in vivo animal studies in 2023.

• The novel CAR T technology was sourced by Fortress and is currently in development at Mustang Bio.
  

Marketed Dermatology Products and Product Candidates

• Journey Medical Corporation (Nasdaq: DERM) (“Journey Medical”), our partner company, markets prescription dermatology products.

• In January 2023, Journey Medical completed enrollment in its DFD-29 Phase 3 clinical program for the treatment of papulopustular rosacea and achieved the “Last Patient Out” milestone in May 2023. Topline data from the DFD-29 Phase 3 clinical studies are expected in June of 2023. Journey Medical plans to submit its NDA for DFD-29 in the second half of 2023, and an FDA approval decision is anticipated in the second half of 2024.

  • In the Phase 2 clinical trials, DFD-29 (40mg) demonstrated nearly double the efficacy when compared to Oraycea® (European equivalent of Oracea®) on both co-primary endpoints. For the first co-primary endpoint, Investigator’s Global Assessment (“IGA”) treatment success, Oraycea had a 33.33% IGA treatment success rate, while DFD-29 achieved a 66.04% IGA treatment success rate. For the second co-primary endpoint, the change in total inflammatory lesion count, Oraycea had a 10.5 reduction in inflammatory lesions, while DFD-29 achieved a 19.2 reduction in inflammatory lesions.

• Journey Medical’s total product net revenues were $12.2 million for the first quarter of 2023, compared to first quarter 2022 total product net revenues of $20.8 million. Compared to the prior year period, net sales were primarily impacted by Targadox® generic competition and gross-to-net deductions for Targadox and Ximino®, including returns and managed care rebates. Higher unit sales were seen in Accutane®, Amzeeq®, Zilxi® and Exelderm®, while Qbrexza® volume decreased but was offset by pricing increases.

General Corporate:

Fortress

• In February 2023, Fortress completed a registered direct offering priced at-the-market under Nasdaq rules for total gross proceeds of approximately $13.9 million, and a concurrent private placement with investors in the registered direct offering for the pro rata rights to acquire, in the aggregate, securities exercisable into common stock in certain future operating subsidiaries that consummate a specified corporate development transaction within the next five years.
  

Financial Results:

To assist our stockholders in understanding our company, we have prepared non-GAAP financial metrics for the three months ended March 31, 2023 and 2022. These metrics exclude the operations of our four public partner companies: Avenue, Checkpoint, Journey Medical and Mustang Bio, as well as any one-time, non-recurring, non-cash transactions. The goal in providing these non-GAAP financial metrics is to highlight the financial results of Fortress’ core operations, which comprise our privately held development-stage entities, as well as our business development and finance functions.

• As of March 31, 2023, Fortress’ consolidated cash, cash equivalents and restricted cash totaled $154.9 million, compared to $181.0 million as of December 31, 2022, a decrease of $26.1 million during the quarter.

• On a GAAP basis, Fortress’ net revenue totaled $12.4 million for the first quarter of 2023, which included $12.2 million in net revenue generated from our marketed dermatology products. This compares to net revenue totaling $23.9 million for the first quarter of 2022, which included $20.8 million in net revenue generated from our marketed dermatology products.

• On a GAAP basis, consolidated research and development expenses including license acquisitions were $39.5 million for the first quarter of 2023, compared to $36.7 million for the first quarter of 2022. On a non-GAAP basis, Fortress research and development expenses were $2.3 million for the first quarter of 2023, compared to $2.8 million for first quarter of 2022.

• On a GAAP basis, consolidated selling, general and administrative expenses were $25.3 million for the first quarter of 2023, compared to $26.3 million for the first quarter of 2022. On a non-GAAP basis, Fortress selling, general and administrative expenses were $7.0 million, for the first quarter of 2023, compared to $6.2 million for the first quarter of 2022.

• On a GAAP basis, consolidated net loss attributable to common stockholders was $21.5 million, or $0.21 per share, for the first quarter of 2023, compared to consolidated net loss attributable to common stockholders of $15.8 million, or $0.18 per share for the first quarter of 2022.

• Fortress’ non-GAAP loss attributable to common stockholders was $6.5 million, or $0.06 per share, for the first quarter of 2023, compared to Fortress’ non-GAAP loss attributable to common stockholders of $5.7 million, or $0.07 per share, for the first quarter of 2022.

Use of Non-GAAP Measures:
In addition to the GAAP financial measures as presented in our filings with the Securities and Exchange Commission (“SEC”), including our Form 10-Q to be filed on May 15, 2023, the Company, in this press release, has included certain non-GAAP measurements. The non-GAAP net loss attributable to common stockholders is defined by the Company as GAAP net loss attributable to common stockholders, less net losses attributable to common stockholders from our public partner companies Avenue, Checkpoint, Journey Medical and Mustang Bio (“public partner companies”), as well as our former subsidiary, Caelum. In addition, the Company has also provided a Fortress non-GAAP loss attributable to common stockholders which is a modified EBITDA calculation that starts with the non-GAAP loss attributable to common stockholders and removes stock-based compensation expense, non-cash interest expense, amortization of licenses and debt discount, changes in fair values of investment, changes in fair value of derivative liability, and depreciation expense. The Company also provides non-GAAP research and development costs, defined as GAAP research and development costs, less research and development costs of our public partner companies and non-GAAP selling, general and administrative costs, defined as GAAP selling, general and administrative costs, less selling, general and administrative costs of our public partner companies.

Management believes each of these non-GAAP measures provide meaningful supplemental information regarding the Company's performance because (i) it allows for greater transparency with respect to key measures used by management in its financial and operational decision-making; (ii) it excludes the impact of non-cash or, when specified, non-recurring items that are not directly attributable to the Company's core operating performance and that may obscure trends in the Company's core operating performance; and (iii) it is used by institutional investors and the analyst community to help analyze the Company's standalone results separate from the results of its public partner companies. However, non-GAAP loss attributable to common stockholders and any other non-GAAP financial measures should be considered as a supplement to, and not as a substitute for, or superior to, the corresponding measures calculated in accordance with GAAP. Further, non-GAAP financial measures used by the Company and the manner in which they are calculated may differ from the non-GAAP financial measures or the calculations of the same non-GAAP financial measures used by other companies, including the Company's competitors.

The tables below provide a reconciliation from GAAP to non-GAAP measures:

1. Avenue net loss for the three months ended March 31, 2023 of $7.5 million net of non-controlling interest ("NCI") of $6.4 million, Master Services Agreement ("MSA") fee to Fortress of $0.1 million, and financing fee to Fortress of $0.1 million; net loss for the three months ended March 31, 2022 of $2.9 million, net of NCI of $2.4 million.

2. Checkpoint net loss for the three months ended March 31, 2023 of $10.5 million net of NCI of $8.4 million, MSA fee to Fortress of $0.1 million, and financing fee to Fortress of $0.2 million; net loss for the three months ended March 31, 2022 of $16.8 million net of NCI of $13.6 million, MSA fee to Fortress of $0.1 million, and financing fee to Fortress of $0.2 million.

3. Journey Medical net loss for the three months ended March 31, 2023 of $10.1 million net of NCI of $4.4 million; net loss for the three months ended March 31, 2022 of $1.4 million net of NCI of $0.5 million and tax expense recognized on a stand-alone basis of $0.1 million.

4. Mustang Bio net loss for the three months ended March 31, 2023 of $16.7 million net of NCI of $13.3 million, Fortress MSA fee of $0.1 million, and Fortress financing fee of $0.1 million; net loss for the three months ended March 31, 2022 of $19.8 million net of NCI of $16.2 million, MSA fee to Fortress of $0.3 million and financing fee to Fortress of $0.8 million.

Reconciliation to non-GAAP research and development costs and non-GAAP selling, general and administrative costs:

1. Includes Research and development expense and Research and development - licenses acquired expense for the periods presented.

2. Excludes $0.1 million of Fortress MSA expense payable to Fortress for the three months ended March 31, 2023.

3. Excludes $0.1 million of Fortress MSA expense payable to Fortress for the each of the three months ended March 31, 2023 and 2022, respectively.

4. Excludes $0.1 million of Fortress MSA expense and $0.1 million financing fee payable to Fortress for the three months ended March 31, 2023.

5. Excludes $0.1 million of Fortress MSA expense and $0.2 million Fortress financing fee for the three months ended March 31, 2023; and excludes $0.1 million of Fortress MSA expense and $0.2 million Fortress financing fee for the three months ended March 31, 2022.

6. Excludes $0.1 million of Fortress MSA expense and $0.1 million Fortress financing fee for the three months ended March 31, 2023; and $0.1 million of Fortress MSA expense and $0.9 million Fortress financing fee for the three months ended March 31, 2022.

About Fortress Biotech
Fortress Biotech, Inc. (“Fortress”) is an innovative biopharmaceutical company focused on acquiring, developing and commercializing high-potential marketed and development-stage drugs and drug candidates. The company has eight marketed prescription pharmaceutical products and over 30 programs in development at Fortress, at its majority-owned and majority-controlled partners and subsidiaries and at partners and subsidiaries it founded and in which it holds significant minority ownership positions. Such product candidates span six large-market areas, including oncology, rare diseases and gene therapy, which allow it to create value for shareholders. Fortress advances its diversified pipeline through a streamlined operating structure that fosters efficient drug development. The Fortress model is driven by a world-class business development team that is focused on leveraging its significant biopharmaceutical industry expertise to further expand the company’s portfolio of product opportunities. Fortress has established partnerships with some of the world’s leading academic research institutions and biopharmaceutical companies to maximize each opportunity to its full potential, including AstraZeneca, City of Hope, Fred Hutchinson Cancer Center, St. Jude Children’s Research Hospital, Nationwide Children’s Hospital and Sentynl. For more information, visit www.fortressbiotech.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, as amended. As used below and throughout this press release, the words “we”, “us” and “our” may refer to Fortress individually or together with one or more partner companies, as dictated by context. Such statements include, but are not limited to, any statements relating to our growth strategy and product development programs, ability to generate shareholder value, ability of our products to receive necessary approvals, including FDA approval, ability of our products and therapies to help patients 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 price. Factors that could cause actual results to differ materially from those currently anticipated include, risks relating to: our growth strategy; financing and strategic agreements and relationships; our need for substantial additional funds and uncertainty relating to financings; our ability to identify, acquire, close and integrate product candidates successfully and on a timely basis; our ability to attract, integrate and retain key personnel; the early stage of products under development; the results of research and development activities; uncertainties relating to preclinical and clinical testing; risks relating to the timing of starting and completing clinical trials; the ability to secure and maintain third-party manufacturing, marketing and distribution of our and our partner companies’ products and product candidates; 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 may be 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. The information contained herein is intended to be reviewed in its totality, and any stipulations, conditions or provisos that apply to a given piece of information in one part of this press release should be read as applying mutatis mutandis to every other instance of such information appearing herein.

Company Contact:
Jaclyn Jaffe
Fortress Biotech, Inc.
(781) 652-4500
ir@fortressbiotech.com

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

---

¹ The development programs depicted in this press release include product candidates in development at Fortress, at Fortress’ private subsidiaries (referred to herein as “subsidiaries”), at Fortress’ public subsidiaries (referred to herein as “partner companies”) and at entities with which one of the foregoing parties has a significant business relationship, such as an exclusive license or an ongoing product-related payment obligation (such entities referred to herein as “partners”). The words “we”, “us” and “our” may refer to Fortress individually, to one or more of our subsidiaries and/or partner companies, or to all such entities as a group, as dictated by context.
² Information on clinicaltrials.gov does not constitute part of this release.
³ M. Zanovello et al., Unexpected frequency of the pathogenic ARCAG repeat 2 expansion in the general population. Brain, in press (2023).