Epizyme Provides Business Update and Reports First Quarter 2019 Financial Results

Tazemetostat NDA Submissions for Epithelioid Sarcoma and Follicular
Lymphoma on Track for Second Quarter and Fourth Quarter 2019,

Updated Data from Tazemetostat Development Program to be Presented in
the Second Quarter

First Research Milestone Achieved in Worldwide Collaboration with
Boehringer Ingelheim to Develop Novel Epigenetic Oncology Therapies

CAMBRIDGE, Mass.–(BUSINESS WIRE)–Epizyme, Inc. (Nasdaq: EPZM), a late-stage biopharmaceutical company
developing novel epigenetic therapies, today provided business and
pipeline updates and reported first quarter 2019 financial results.

“This is an incredibly exciting time for our company, and 2019 is slated
to be one of the most important years in Epizyme’s evolution,” said
Robert Bazemore, president and chief executive officer of Epizyme. “Our
team is on track to submit two NDAs for tazemetostat this year, first
for epithelioid sarcoma in the second quarter, which, if successful,
would make tazemetostat the first commercially available EZH2 inhibitor,
and then a second submission for follicular lymphoma in the fourth
quarter. We are preparing for multiple clinical trials starting mid-year
designed to expand the utility of tazemetostat, and to initiate clinical
development of our novel G9a inhibitor in the second half of 2019. In
addition, we have achieved the first milestone in our partnership with
Boehringer Ingelheim, which further validates our research expertise and
our collaboration strategy in epigenetic target discovery and drug
development. With each milestone accomplished, we are one step closer to
fulfilling our mission of bringing new treatments to patients with
cancer and other serious diseases.”

Tazemetostat Program Updates and Progress

  • NDA Submission for Epithelioid Sarcoma (ES) on Track for Second
    Epizyme is well underway with its preparations to submit
    its first New Drug Application (NDA) for accelerated approval to the
    U.S. Food and Drug Administration (FDA) in the second quarter of 2019
    for tazemetostat in patients with ES. This is an ultra-rare and
    difficult-to-treat sarcoma, and if approved, tazemetostat would be the
    first treatment specifically indicated for patients with ES. Updated
    data from the company’s ongoing Phase 2 trial in ES will be presented
    at the 2019 American Society of Clinical Oncology (ASCO) Annual
    Meeting in Chicago; details will be disclosed at a future date.
  • NDA Submission for All-Comer Follicular Lymphoma (FL) Population
    Planned for Fourth Quarter:
    Epizyme plans to submit an NDA for
    accelerated approval of tazemetostat for patients with FL, regardless
    of their EZH2 mutational status, who have been previously treated with
    two or more systemic therapies. The ongoing Phase 2 study has
    completed enrollment, and the company is working toward the submission
    of an NDA for accelerated approval in the fourth quarter of 2019 for
    this patient population. Updated data from the Phase 2 trial will be
    presented at a medical meeting in the second quarter of 2019. Details
    will be disclosed at a future date.

Planned Tazemetostat Clinical Studies in 2019

Epizyme is planning for multiple clinical trials designed to expand the
benefit of tazemetostat into earlier treatment lines in follicular
lymphoma, and to explore new combinations and potential indications in
both FL and solid tumors. Planned clinical trials include:

  • a combination study of tazemetostat with the chemo-free treatment
    regimen “R2” (Revlimid® plus Rituxan®)
    for patients with relapsed/refractory FL who have received at least
    one prior therapy;
  • a combination study of tazemetostat with Rituxan for patients with
    relapsed/refractory FL;
  • a combination study of tazemetostat with R-CHOP for front-line
    patients with FL in collaboration with the Lymphoma Study Association
  • a combination study of tazemetostat with the standards-of-care for
    patients with castration-resistant prostate cancer; and
  • a combination study of tazemetostat with a PARP inhibitor for patients
    with platinum-resistant solid tumors, such as small-cell lung cancer,
    triple-negative breast cancer and ovarian cancer.

Initiation of Clinical Development of EZM8266 for Sickle Cell Disease

  • Upon approval of an Investigational New Application (IND) for EZM8266
    for the treatment of patients with sickle cell disease, Epizyme
    anticipates beginning clinical development in the second half of 2019
    with a Phase 1 trial of EZM8266, a novel, first-in-class G9a inhibitor.

Business Updates

  • Epizyme recently earned a $5.5 million milestone payment from
    Boehringer Ingelheim, following the selection of a lead optimization
    candidate for the shared program targeting an enzyme within the
    helicase family. The companies are jointly researching and developing
    this program, with both parties sharing U.S. commercialization
    responsibilities and Boehringer Ingelheim assuming responsibility for
    commercialization outside the U.S. The companies will also share
    research responsibilities for a histone acetyltransferase (HAT)
    program that is under development.
  • In March of this year, Epizyme raised $172.50 million in aggregate
    gross proceeds, before deducting underwriting discounts and offering
    expenses, from two concurrent underwritten public offerings.

First Quarter 2019 Financial Results

  • Cash Position: Cash, cash equivalents and marketable securities
    were $371.1 million as of March 31, 2019, as compared to $247.9
    million as of March 31, 2018.
  • Revenue: Collaboration revenue for the first quarter of
    2019 was $7.9 million. There was no collaboration revenue recognized
    for the first quarter of 2018. The increase in collaboration revenue
    is due to the company’s collaboration with Boehringer Ingelheim, which
    was initiated in November 2018.
  • R&D Expenses: Research and development (R&D) expenses
    were $26.9 million for the first quarter of 2019, compared to $25.6
    million for the first quarter of 2018. The increase is primarily due
    to greater tazemetostat manufacturing costs and costs incurred in
    preparation for two NDA submissions offset by decreases in clinical
    trial expenses.
  • G&A Expenses: General and administrative (G&A) expenses
    were $12.0 million for the first quarter of 2019, compared to $9.4
    million for the first quarter of 2018. The increase is primarily due
    to a rise in medical affairs and commercial costs as a result of
    organizational development in preparation for tazemetostat
  • Net Loss Attributed to Common Stockholders: Net loss
    attributable to common stockholders was $32.3 million, or $0.39 per
    share, for the first quarter of 2019, compared to $34.1 million,
    or $0.49 per share, for the first quarter of 2018.

Financial Guidance

Following its March financing, and based on its current operating plan,
Epizyme expects its cash runway to extend into at least the first
quarter of 2021.

The company will not hold a conference call in conjunction with these

About the Epizyme-Boehringer Ingelheim Collaboration

Epizyme and Boehringer Ingelheim established a worldwide collaboration
agreement in November 2018 to develop novel epigenetic oncology
therapies. Under the terms of the agreement, Boehringer Ingelheim and
Epizyme will jointly research and develop a helicase program, with both
parties sharing U.S. commercialization responsibilities and Boehringer
Ingelheim assuming responsibility for commercialization outside the U.S.
Epizyme and Boehringer Ingelheim will also share research
responsibilities for a histone acetyltransferase (HAT) program, with
Boehringer Ingelheim assuming responsibility for worldwide development
and commercialization. Epizyme received an upfront payment of $15
million and will receive an additional $5 million in research funding in
2019, and is eligible to receive up to $280.5 million in research,
development and commercialization milestones. For the helicase program,
Epizyme will fund a portion of the global development costs, retain a
share of U.S. profits and receive tiered royalties on ex-U.S. sales. For
the HAT program, Epizyme is eligible to receive tiered royalties on
worldwide sales.

About Epizyme, Inc.

Epizyme, Inc. is a late-stage biopharmaceutical company committed to
rewriting treatment for cancer and other serious diseases through novel
epigenetic medicines. Epizyme is broadly developing its lead product
candidate, tazemetostat, a first-in-class EZH2 inhibitor, with studies
underway in both solid tumors and hematological malignancies, as a
monotherapy and combination therapy in relapsed and front-line disease.
The company also is developing a novel G9a program with its next
development candidate, EZM8266, which is targeting sickle cell disease.
By focusing on the genetic drivers of disease, Epizyme’s science seeks
to match targeted medicines with the patients who need them. For more
information, visit www.epizyme.com.

Cautionary Note on Forward-Looking Statements

Any statements in this press release about future expectations, plans
and prospects for Epizyme, Inc. and other statements containing the
words “anticipate,” “believe,” “estimate,” “expect,” “intend,” “may,”
“plan,” “predict,” “project,” “target,” “potential,” “will,” “would,”
“could,” “should,” “continue,” and similar expressions, constitute
forward-looking statements within the meaning of The Private Securities
Litigation Reform Act of 1995. Actual results may differ materially from
those indicated by such forward-looking statements as a result of
various important factors, including: uncertainties inherent in the
initiation of future 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; whether results from
clinical studies will warrant meetings with regulatory authorities,
submissions for regulatory approval or review by governmental
authorities under the accelerated approval process; whether Fast Track
Designation and Orphan Drug Designations will provide the benefits for
which tazemetostat is eligible; expectations for regulatory approvals,
including accelerated approval, to conduct trials or to market products;
whether the company’s cash resources will be sufficient to fund the
company’s foreseeable and unforeseeable operating expenses and capital
expenditure requirements; other matters that could affect the
availability or commercial potential of the company’s therapeutic
candidates; and other factors discussed in the “Risk Factors” section of
the company’s most recent Form 10-Q filed with the SEC and in the
company’s other filings from time to time with the SEC. In addition, the
forward-looking statements included in this press release represent the
company’s views as of the date hereof and should not be relied upon as
representing the company’s views as of any date subsequent to the date
hereof. The company anticipates that subsequent events and developments
will cause the company’s views to change. However, while the company may
elect to update these forward-looking statements at some point in the
future, the company specifically disclaims any obligation to do so.


(Amounts in thousands)

March 31,
December 31,
Consolidated Balance Sheet Data:
Cash, cash equivalents, and marketable securities $   371,146 $   240,304
Total assets 412,722 275,501
Current portion of deferred revenue 5,409 13,300
Deferred revenue, net of current portion 3,806 3,806
Total stockholders’ equity 368,353 233,009
(Amounts in thousands except per share data)
    Three Months Ended
March 31,
2019   2018
Collaboration revenue $ 7,891 $
Operating expenses:
Research and development 26,896 25,622
General and administrative   11,986   9,360
Total operating expenses   38,882   34,982
Operating loss (30,991) (34,982)
Other income, net:
Interest income, net 1,658 899
Other (expense) income, net   (6)   18
Other income, net   1,652   917
Net loss $ (29,339) $ (34,065)
Reconciliation of net loss to net loss attributable to common
Net loss $ (29,339) $ (34,065)
Accretion of convertible preferred stock   (2,940)  
Net loss attributable to common stockholders $ (32,279) $ (34,065)
Net loss per share attributable to common stockholders – basic and
$ (0.39) $ (0.49)
Weighted-average common shares outstanding used in net loss per
share attributable to common stockholders – basic and diluted
  82,424   69,386


Erin Graves, (617) 500-0615
Epizyme, Inc.
[email protected]

Lister, (919) 777-3049
THRUST Strategic Communications
[email protected]

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