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Magenta Therapeutics Reports Third Quarter Financial Results and Program Highlights

-- Positive topline clinical data from all patients in an investigator-initiated Phase 2 clinical trial evaluating stem cell mobilization and transplant engraftment using MGTA-145 plus plerixafor in patients with multiple myeloma will be presented as a poster at the 2021 American Society of Hematology (ASH) Annual Meeting on December 13, 2021 --

-- MGTA-117 targeted conditioning program clinical trial start-up activities are ongoing after clearance of Investigational New Drug (IND) Application; Phase 1/2 trial expected to open in December 2021 --

-- Ended Q3 2021 with approximately $192.6 million in cash, cash equivalents and marketable securities, and the company maintains guidance that cash reserves are expected to fund the operating plan into Q3 2023 --

Magenta Therapeutics, Inc. (Nasdaq: MGTA), a clinical-stage biotechnology company developing novel medicines designed to bring the curative power of stem cell transplants to more patients, today reported financial results for the third quarter ended September 30, 2021, and recent program highlights.

“We are pleased with our recent execution across the portfolio as we look to continue to allocate our capital efficiently to our value-creating opportunities,” said Jason Gardner, D.Phil., President and Chief Executive Officer, Magenta Therapeutics. “In mid-September, we cleared the IND process for the MGTA-117 targeted conditioning program and are now conducting the clinical trial start-up activities with the continued expectation of opening the trial this year. The MGTA-145 stem cell mobilization program also continues to advance with a fully enrolled investigator-initiated trial in multiple myeloma patients, a Phase 2 clinical trial in allogeneic transplant and the expected start of a Phase 2 clinical trial evaluating mobilization and collection of stem cells from patients with sickle cell disease.”

Business Highlights:

In October 2021, Magenta welcomed Jeffrey Humphrey, M.D. to its Executive Team as Chief Medical Officer.

Program Highlights:

MGTA-145 Stem Cell Mobilization and Collection

Recent and Planned Activity:

Autologous Stem Cell Transplant: Multiple Myeloma

  • Investigator-Initiated Phase 2 Clinical Trial Design, Topline Data and Next Steps.
    • Trial Design: Surbhi Sidana, M.D., Assistant Professor of Medicine in the Division of Blood and Marrow Transplantation and Cellular Therapy at Stanford University School of Medicine led this investigator-initiated, Phase 2 open-label clinical trial. The trial evaluated the ability of MGTA-145, in combination with plerixafor, to mobilize stem cells for autologous stem cell transplantation in patients with multiple myeloma.
  • Top-Line Clinical Data in Poster Presentation at 2021 ASH Annual Meeting: Top line clinical data from the fully enrolled investigator-initiated clinical trial will be included in a poster presentation at the ASH Annual Meeting, held December 11-14, 2021. As disclosed separately, the clinical data showed that eighty-eight percent (88%) of patients (22/25) treated with MGTA-145 plus plerixafor met the primary endpoint of sufficient stem cell mobilization and collection for transplant. Also, as of the time of the data submission for the ASH meeting, all patients (18/18) transplanted with stem cells mobilized by MGTA-145 plus plerixafor successfully engrafted. MGTA-145 plus plerixafor was well tolerated.
  • Next Steps in Multiple Myeloma: The results from this investigator-initiated trial represent a positive step forward in the development of MGTA-145, in combination with plerixafor, as a potential first line stem cell mobilization regimen. Based on the encouraging collection and engraftment data, the company intends to explore further development of MGTA-145 in a Phase 2b clinical setting. This approach would enable a comprehensive evaluation of the multiple myeloma patient population and allow for adjustments of dosing and administration which the company, in both cases, has identified as opportunities for optimization as a result of this investigator-initiated study and the company’s other MGTA-145 development efforts.
  • Allogeneic Stem Cell Transplant: Acute Myeloid Leukemia (AML), Acute Lymphocytic Leukemia (ALL) and Myelodysplastic Syndromes (MDS)
    • Phase 2 Clinical Trial and Next Steps.
      • Trial Design. This Phase 2 clinical trial is designed to evaluate MGTA-145 in combination with plerixafor, in the mobilization and collection of stem cells from allogeneic donors for transplant in patients with AML, ALL and MDS.
      • Next Steps. Based on what Magenta has learned to date from the totality of the MGTA-145 program-related clinical trial data and other relevant information, Magenta believes it has identified an opportunity to optimize certain elements of the dosing and administration of the MGTA-145 mobilization regimen. Accordingly, Magenta intends to amend the Phase 2 allogeneic clinical trial to include a higher dose of MGTA-145 that matches the dose level used in the Phase 2 multiple myeloma clinical trial.
  • Stem Cell Mobilization of Patients with Sickle Cell Disease in Collaboration with bluebird bio. Magenta expects to open the Phase 2 clinical trial in December 2021. The trial is designed to evaluate the utility of MGTA-145 in combination with plerixafor, for the mobilization and collection of stem cells in patients with sickle cell disease where mobilization and collection is difficult and there is a clear unmet medical need.

MGTA-117 Targeted Conditioning

Recent and Planned Activity:

  • Phase 1/2 Clinical Trial Start-Up Activities Ongoing. The IND for the company’s MGTA-117 antibody-drug conjugate (ADC) targeted conditioning program is active with the U.S. Food and Drug Administration (FDA). The company expects to open the multi-center Phase 1/2 clinical trial in December 2021. The Phase 1/2 trial is designed to utilize dose escalating cohorts to evaluate the safety, tolerability, pharmacokinetics and pharmacodynamics of MGTA-117 as a single dose with possible anti-tumor therapeutic benefit in patients with relapsed/refractory AML and MDS. As previously disclosed, Magenta expects to work with the FDA on an ongoing basis to transition the clinical trial to the primary target population of hematopoietic stem cell (HSC) transplant-eligible patients with AML and MDS after adequate data related to the safety, pharmacokinetics and pharmacodynamics of MGTA-117 have been collected in this initial patient population. As the program progresses, Magenta also plans to explore MGTA-117 as a targeted conditioning agent prior to the delivery of gene-corrected cells associated with stem cell gene therapy.
  • Oral Presentation at the 2021 American Society of Hematology (ASH) Annual Meeting. As disclosed by Magenta in a separate press release, preclinical data showing that a single dose of a tool CD117 antibody drug conjugate (CD117-ADC) supports efficient engraftment of gene-modified CD34+ stem cells in a rhesus gene therapy model. The CD117-ADC utilized in this study had minimal toxicities unlike busulfan conditioning. The data will be the subject of an oral presentation at the ASH Annual Meeting on December 13, 2021.

Financial Results:

Cash Position: Cash, cash equivalents and marketable securities as of September 30, 2021, were $192.6 million, compared to $148.8 million as of December 31, 2020. Magenta anticipates that its cash, cash equivalents and marketable securities will be sufficient to fund operations and capital expenditures into the third quarter of 2023.

Research and Development Expenses: Research and development expenses were $10.8 million in the third quarter of 2021, compared to $11.8 million in the third quarter of 2020. The decrease was driven primarily by the completion of the GMP manufacturing activities to support the IND application for MGTA-117 and future clinical trials offset by an increase in personnel related costs.

General and Administrative Expenses: General and administrative expenses were $7.5 million for the third quarter of 2021, compared to $6.6 million for the third quarter of 2020. The increase was primarily due to an increase in personnel related costs.

Net Loss: Net loss was $17.4 million for the third quarter of 2021, compared to net loss of $17.7 million for the third quarter of 2020.

About Magenta Therapeutics

Magenta Therapeutics is a clinical-stage biotechnology company developing medicines designed to bring the curative power of stem cell transplants to more patients with blood cancers, genetic diseases and autoimmune diseases. Magenta is combining leadership in stem cell biology and biotherapeutics development with clinical and regulatory expertise and broad networks in the stem cell transplant community to revolutionize immune reset for more patients.

Magenta is based in Cambridge, Massachusetts. For more information, please visit www.magentatx.com.

Follow Magenta on Twitter: @magentatx.

Forward-Looking Statement

This press release may contain forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995 and other federal securities laws, including express or implied statements regarding Magenta’s future expectations, plans and prospects, including, without limitation, statements regarding expectations and plans for presenting pre-clinical and clinical data, the initiation of clinical trials or the results of ongoing and planned clinical trials, the development of product candidates and advancement of preclinical programs, projections regarding future revenues and financing performance, long-term growth, cash, cash equivalents and marketable securities, the anticipated timing of clinical trials and regulatory filings, the potential benefits of product candidates, the timing, progress and success of collaborations, as well as other statements containing the words “anticipate,” “believe,” “continue,” “could,” “endeavor,” “estimate,” “expect,” “intend,” “may,” “might,” “plan,” “potential,” “predict,” “project,” “seek,” “should,” “target,” “will” or “would” and similar expressions that constitute forward-looking statements under the Private Securities Litigation Reform Act of 1995. The express or implied forward-looking statements included in this press release are only predictions and are subject to a number of risks, uncertainties and assumptions, including, without limitation: uncertainties inherent in clinical studies and in the availability and timing of data from ongoing clinical studies; whether interim results from a clinical trial will be predictive of the final results of the trial; whether results from preclinical studies or earlier clinical studies will be predictive of the results of future trials; the expected timing of submissions for regulatory approval or review by governmental authorities; discussions with governmental agencies such as the FDA; regulatory approvals to conduct trials or to market products; whether Magenta's cash resources will be sufficient to fund Magenta's foreseeable and unforeseeable operating expenses and capital expenditure requirements; risks, uncertainties and assumptions regarding the impact of the continuing COVID-19 pandemic on Magenta’s business, operations, strategy, goals and anticipated timelines, Magenta’s ongoing and planned preclinical activities, Magenta’s ability to initiate, enroll, conduct or complete ongoing and planned clinical trials, Magenta’s timelines for regulatory submissions and Magenta’s financial position; and other risks concerning Magenta's programs and operations are described in additional detail in its Annual Report on Form 10-K filed on March 3, 2021, as updated by Magenta’s most recent Quarterly Report on Form 10-Q, and its other filings made with the Securities and Exchange Commission from time to time. Although Magenta's forward-looking statements reflect the good faith judgment of its management, these statements are based only on facts and factors currently known by Magenta. As a result, you are cautioned not to rely on these forward-looking statements. Any forward-looking statement made in this press release speaks only as of the date on which it is made. Magenta undertakes no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future developments or otherwise.

Magenta Therapeutics, Inc.
 
STATEMENTS OF OPERATIONS
(unaudited)
(In thousands, except share and per share data)
 
Three Months Ended September 30, Nine Months Ended September 30,

 

2021

 

2020

 

2021

 

2020

Operating expenses:
Research and development

$

10,795

$

11,786

$

33,652

$

38,359

General and administrative

 

7,450

 

6,595

 

20,900

 

21,278

Total operating expenses

 

18,245

 

18,381

 

54,552

 

59,637

Loss from operations

 

(18,245)

 

(18,381)

 

(54,552)

 

(59,637)

Interest and other income, net

 

818

 

703

 

2,708

 

2,869

Net loss

$

(17,427)

$

(17,678)

$

(51,844)

$

(56,768)

Net loss per share, basic and diluted

$

(0.30)

$

(0.37)

$

(0.97)

$

(1.34)

Weighted average common shares outstanding, basic and diluted

 

58,583,476

 

48,255,353

 

53,655,314

 

42,431,874

BALANCE SHEET DATA

(unaudited)

(In thousands)

 
    September 30, 2021    December 31, 2020
Cash, cash equivalents and marketable securities  

 $                 192,616

 

 $                 148,835

Working capital  

                    186,328

 

                    140,097

Total assets  

                    206,236

 

                    161,619

Stockholders' equity   

                    189,688

 

                    143,906

 

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