ImmunoGen Reports Recent Progress and 2018 Operating Results

Top-Line Data from Phase 3 FORWARD I Mirvetuximab Soravtansine Study
on Track for First Half of 2019

Encouraging Clinical Data from Novel IGN Pipeline Highlighted in Two
Oral Presentations at ASH 2018

Sale of Kadcyla® Royalty Tail for $65
Million Further Strengthens Financial Position

Conference Call to be Held at 8:00 a.m. ET Today

, (Nasdaq: IMGN), a leader in the expanding field of
antibody-drug conjugates (ADCs) for the treatment of cancer, today
reviewed recent progress and operating results for the quarter and year
ended December 31, 2018.

“We generated significant momentum in the business during 2018, led by
the completion of enrollment in FORWARD I, our registration study for
mirvetuximab soravtansine in platinum-resistant ovarian cancer; the
publication of combination data in over 100 patients to support label
expansion; and the advancement of our earlier-stage portfolio,” said
Mark Enyedy, ImmunoGen’s President and Chief Executive Officer. “On the
strength of this performance, we enter 2019 poised to deliver on a
number of important catalysts for the company, including top-line
results from FORWARD I in the first half of the year, the potential BLA
and MAA submissions for mirvetuximab monotherapy in the second half of
the year, and additional combination data from our triplet in
platinum-sensitive disease. Beyond our lead program, we expect to report
data from expansion studies in AML and BPDCN with our programs targeting
hematological malignancies and to file an IND before year-end for
IMGC936, an ADAM9-targeting ADC being developed in collaboration with
MacroGenics. Finally, with the benefit of the sale of the Kadcyla
royalty tail, we start the year with roughly $325 million on the balance
sheet to support our development and pre-commercial activities as we
transition to a fully-integrated company.”

Mirvetuximab Soravtansine

  • Validation runs were successfully completed and commercial drug
    product is now in inventory.
  • The Premarket Approval (PMA) submission for the folate receptor alpha
    companion diagnostic was initiated.
  • Patient enrollment completed ahead of schedule in the FORWARD II
    triplet combination cohort evaluating mirvetuximab plus carboplatin
    and Avastin® (bevacizumab) in patients with recurrent
    platinum-sensitive ovarian cancer.
  • Initial safety and preliminary anti-tumor activity from the FORWARD II
    expansion cohort assessing mirvetuximab in combination with Merck’s
    anti-PD-1 therapy, Keytruda® (pembrolizumab), were
    presented at the European Society for Medical Oncology (ESMO) 2018
    Congress in October. Data from this cohort confirm the activity of
    mirvetuximab in heavily pretreated platinum-resistant ovarian cancer,
    with a trend toward longer duration of response with the combination
    than would be expected for mirvetuximab monotherapy. Maturing data
    from this cohort will guide further development of this novel

IGN Programs and Early-Stage Pipeline

  • Both IGN programs received Orphan Drug Designation in acute myeloid
    leukemia (AML).
  • Encouraging initial data from the Phase 1 study of IMGN632 in patients
    with relapsed or refractory adult AML and blastic plasmacytoid
    dendritic cell neoplasm (BPDCN) were presented at the American Society
    of Hematology (ASH) Annual Meeting in December. IMGN632 displayed
    anti-leukemia activity across all dose levels tested and a tolerable
    safety profile at doses up to 0.3 mg/kg. Enrollment in expansion
    cohorts is ongoing to identify the recommended Phase 2 dose and
    schedule for both AML and BPDCN.
  • Updated data from the IMGN779 Phase 1 dose finding study in AML
    patients were also presented at ASH. These data show that IMGN779
    continues to display a tolerable safety profile with repeat dosing
    across a wide range of doses on the two schedules explored in patients
    with relapsed AML, with anti-leukemia activity seen in both schedules.
    Enrollment is ongoing to identify the recommended Phase 2 dose and
  • IND-enabling activities were initiated during the quarter for IMGC936,
    a novel ADAM9-targeting ADC being developed in collaboration with
  • Multiple abstracts highlighting platform innovations were submitted
    for presentation at the 2019 Annual Meeting of the American
    Association for Cancer Research.

Operational Updates

  • Commercial planning and launch readiness activities for mirvetuximab
    have been initiated to support a potential launch in 2020.
  • Earlier this month, ImmunoGen announced the sale of residual rights to
    receive royalty payments on commercial sales of Kadcyla
    (ado-trastuzumab emtansine) to the Ontario Municipal Employees
    Retirement System (OMERS), the defined benefit pension plan for
    municipal employees in the Province of Ontario, Canada, for $65


  • Report top-line results from Phase 3 FORWARD I trial of mirvetuximab
    in platinum-resistant ovarian cancer in the first half of 2019,
    followed by full FORWARD I data presentation at a medical meeting;
  • Assuming a positive readout of FORWARD I, submit Biologics License
    Application (BLA) and Marketing Authorization Application (MAA) for
    mirvetuximab for the treatment of women with platinum-resistant
    ovarian cancer in 2H 2019;
  • Enroll FORWARD II Avastin cohort in platinum-agnostic ovarian cancer;
  • Present initial FORWARD II triplet and mature doublet expansion cohort
  • Present updated IMGN632 data with additional AML and BPDCN patients,
    and establish the recommended Phase 2 dose and schedule;
  • Initiate IMGN632 combination studies;
  • Establish IMGN779 recommended Phase 2 dose and schedule for
    combination studies in AML; and
  • Submit an IND for IMGC936 before the end of 2019.

Revenues for the year ended December 31,
2018 were $53.8 million, compared with $115.4 million for the year ended
December 31, 2017. License and milestone fees of $15.3 million for 2018
included $13.8 million of recognized upfront fees previously received
from partners and $1.5 million in partner milestone payments. This was
compared to license and milestone fees of $79.5 million for 2017, which
included a $30 million paid-up license fee related to an amendment to
the Company’s collaboration and license agreement with Sanofi, $29.5
million related to the sale and transfer of the Company’s IMGN529 asset
to Debiopharm, $7 million in partner milestone payments, and $12.7
million in amortization of a non-cash fee related to the Company’s
license agreement with CytomX. Revenues for 2018 included $32.5 million
in non-cash royalty revenues, compared with $28.1 million for 2017.
Revenues for 2018 also included $1.4 million of research and development
(R&D) support fees and $4.6 million of clinical materials revenue,
compared with $3.5 million and $4.4 million, respectively, for 2017.

Operating expenses for 2018 were $214.3 million, compared with $174.4
million for 2017. The increase was driven by R&D expenses, which were
$173.9 million for 2018, compared with $139.7 million for 2017. This
increase was primarily due to higher external manufacturing costs and
third-party service fees in support of commercial validation for
mirvetuximab soravtansine, along with higher clinical trial costs
related to the FORWARD I, FORWARD II, and IMGN632 studies and, to a
lesser extent, an increase in stock-based compensation. General and
administrative expenses for 2018 increased to $36.7 million, compared to
$33.9 million for 2017, primarily due to increased third-party service
fees and stock-based compensation. Operating expenses for 2018 also
included a $3.7 million restructuring charge due to the previously
announced decommissioning of the Company’s Norwood facility, compared to
a $0.8 million charge in 2017 related to a loss recorded on leased
office space.

ImmunoGen reported a net loss of $167.9 million, or $1.20 per basic and
diluted share, for 2018, compared with a net loss of $96.0 million, or
$0.98 per basic and diluted share, for 2017. Weighted average shares
outstanding increased to 139.9 million in 2018 from 98.1 million in 2017.

ImmunoGen had $262.3 million in cash and cash equivalents as of December
31, 2018, compared with $267.1 million as of December 31, 2017, and had
$2.1 million of convertible debt outstanding in each period. Cash used
in operations was $166.4 million for 2018, compared with cash provided
from operations of $7.6 million for 2017. The prior period benefited
from a $75 million upfront payment received from Jazz Pharmaceuticals,
and $59.5 million of fees received from Sanofi and Debiopharm. Capital
expenditures were $5.2 million and $1.1 million for 2018 and 2017,

For 2019, ImmunoGen expects:

  • cash and cash equivalents at December 31, 2019 to be between
    $135 million and $140 million;
  • revenues between $40 million and $45 million; and
  • operating expenses between $265 and $270 million.

ImmunoGen expects that its current cash combined with the expected cash
receipts from partners and collaborators will enable the Company to fund
its operations at least a year beyond the release of top-line results
from the Phase 3 FORWARD I trial, which are expected in the first half
of 2019.

ImmunoGen will hold a conference
call today at 8:00 am ET to discuss these results. To access the live
call by phone, dial 323-794-2093; the conference ID is 6271602. The call
may also be accessed through the Investors section of the Company’s
Following the live webcast, a replay of the call will be available at
the same location through February 22, 2019.

ImmunoGen is developing the next generation
of antibody-drug conjugates (ADCs) to improve outcomes for cancer
patients. By generating targeted therapies with enhanced anti-tumor
activity and favorable tolerability profiles, we aim to disrupt the
progression of cancer and offer our patients more good days. We call
this our commitment to “target a better now.” Our lead product
candidate, mirvetuximab soravtansine, is in a Phase 3 study for folate
receptor alpha (FRα)-positive platinum-resistant ovarian cancer, and in
Phase 1b/2 testing in combination regimens. Our novel IGN candidates for
hematologic malignancies, IMGN779 and IMGN632, are in Phase 1 studies.

Learn more about who we are, what we do, and how we do it at

This press release includes
forward-looking statements based on management’s current expectations.
These statements include, but are not limited to, ImmunoGen’s
expectations related to: the Company’s revenues and operating expenses
for the twelve months ending December 31, 2019; its cash and marketable
securities as of December 31, 2019; the occurrence, timing and outcome
of potential pre-clinical, clinical and regulatory events related to the
Company’s and its collaboration partners’ product programs; and the
presentation of preclinical and clinical data on the Company’s and
collaboration partners’ product candidates. For these statements,
ImmunoGen claims the protection of the safe harbor for forward-looking
statements provided by the Private Securities Litigation Reform Act of
1995. Various factors could cause ImmunoGen’s actual results to differ
materially from those discussed or implied in the forward-looking
statements, and you are cautioned not to place undue reliance on these
forward-looking statements, which are current only as of the date of
this release. Factors that could cause future results to differ
materially from such expectations include, but are not limited to: the
timing and outcome of ImmunoGen’s and the Company’s collaboration
partners’ research and clinical development processes; the difficulties
inherent in the development of novel pharmaceuticals, including
uncertainties as to the timing, expense and results of preclinical
studies, clinical trials and regulatory processes; ImmunoGen’s ability
to financially support its product programs; ImmunoGen’s dependence on
collaborative partners; industry merger and acquisition activity; and
other factors more fully described in ImmunoGen’s Annual Report on Form
10-K for the year ended December 31, 2017 and other reports filed with
the Securities and Exchange Commission.

(in thousands, except
per share amounts)
December 31,
December 31,
Cash and cash equivalents $ 262,252 $ 267,107
Other assets   33,499   27,569  
Total assets $ 295,751 $ 294,676  
Current portion of deferred revenue $ 317 $ 1,405
Other current liabilities 69,743 54,365
Long-term portion of deferred revenue 80,485 93,752
Other long-term liabilities 133,264 163,049
Shareholders’ equity (deficit)   11,942   (17,895 )
Total liabilities and shareholders’ equity (deficit) $ 295,751 $ 294,676  


  Three Months Ended
December 31,
  Year Ended
December 31,
2018   2017   2018   2017
License and milestone fees $ 1,747 $ 29,580 $ 15,280 $ 79,469
Non-cash royalty revenue 9,651 7,587 32,524 28,142
Research and development support 218 452 1,377 3,482
Clinical materials revenue   2,170     1,829     4,635     4,354  
Total revenues   13,786     39,448     53,816     115,447  
Research and development 43,111 39,843 173,886 139,739
General and administrative 9,722 9,048 36,716 33,911
Restructuring charge   406     393     3,693     779  
Total operating expenses   53,239     49,284     214,295     174,429  
Loss from operations (39,453 ) (9,836 ) (160,479 ) (58,982 )
Non-cash interest expense on liability related to sale of future
royalty & convertible bonds
(2,428 ) (3,221 ) (10,631 ) (13,682 )
Non-cash debt conversion expense (724 ) (22,915 )
Interest expense on convertible bonds (25 ) (28 ) (95 ) (3,040 )
Other income, net   1,077     691     3,332     2,607  
Net loss $ (40,829 ) $ (13,118 ) $ (167,873 ) $ (96,012 )
Net loss per common share, basic and diluted $ (0.28 ) $ (0.11 ) $ (1.20 ) $ (0.98 )
Weighted average common shares outstanding, diluted   147,287     124,583     139,946     98,068  


THRUST Strategic Communications

Courtney O’Konek

FTI Consulting
Robert Stanislaro

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