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ImmunoGen
Annual Report 2016

IMGN · NASDAQ Healthcare
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FY2016 Annual Report · ImmunoGen
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Delivering 
Innovative 
Cancer 
Therapies

830 WINTER STREET, WALTHAM, MA 02451

PHONE: 781-895-0600

W W W. I M M U N O G E N .C O M

2016 F O R M

10 - K
A N N UA L
R E P O R T

Delivering 

Innovative 

Cancer 

Therapies

830 WINTER STREET, WALTHAM, MA 02451

PHONE: 781-895-0600

W W W. I M M U N O G E N .C O M

2016 F O R M

10 - K

A N N UA L

R E P O R T

Positioned for Sustainable Value Creation

Industry-Leading ADC Pipeline

Corporate Information

Wholly-owned programs

COMPOUND | TARGET

PRECLINICAL

PHASE 1

PHASE 2

PHASE 3

MARKETED

Leadership in antibody-drug 
conjugates (ADCs) 

Lead program entering 
Phase 3 before year-end

Platform generating
novel clinical candidates

$

Technology validated clinically and 
through partnerships

Strong cash
position

Experienced
management team 

Strategic Direction and Priorities 

Building a fully-integrated biotech delivering innovative ADC therapies
that meaningfully improve the lives of cancer patients

Execute on
speed-to-market 
for mirvetuximab 
soravtansine

Accelerate
earlier-stage portfolio 
with an emphasis on
IGN ADCs

Continue to drive 
innovation in ADCs
as cancer therapies

Lever partnerships
to expand impact
of innovations

With a focus on enhanced fi nancial discipline

Met with FDA;
Phase 3 starting 4Q16

Directors

Executive Offi cers

Corporate Headquarters

Mirvetuximab soravtansine 
(formerly IMGN853) | 
Folate receptor α

Ovarian - monotherapy

Ovarian - combination

IMGN779 | CD33

Acute myeloid leukemia

IMGN632 | CD123

Hematological malignancies

IMGN529 | CD37

DLBCL* with Rituxan®

Coltuximab ravtansine | CD19

DLBCL

Partner programs

COMPOUND | TARGET

PRECLINICAL

PHASE 1

PHASE 2

PHASE 3

MARKETED

Daniel M. Junius

Roche
KADCYLA® Ado-trastuzumab 
emtansine | HER2

Bayer
Anetumab ravtansine
(BAY 94-9343) | Mesothelin

Biotest

Indatuximab ravtansine
(BT-062) | CD138

Sanofi 

Second-line metastatic breast cancer

Mesothelioma

Multiple myeloma

Isatuximab† | CD38

Multiple myeloma

SAR566658 | CA6

Solid tumors

SAR408701 | CeCAM5

Solid tumors

Registration-enabling;
Phase 2 started in 2016

SAR428926 | LAMP1

Solid tumors

Entered clinic in 2015

Novartis

PCA062 | p-Cadherin

Solid tumors

Entered clinic in 2015

Lilly

LY3076226 | FGFR3

Solid tumors

Entered clinic in 2015

Former Senior Vice President and 

Chief Executive Offi cer

Chairman of the Board

Stephen C. McCluski

Chief Financial Offi cer,

Bausch & Lomb, Inc.

Mark J. Enyedy

ImmunoGen, Inc.

President and Chief Executive Offi cer, 

Mark Goldberg, MD

Former Executive Vice President,

Medical and Regulatory Strategy

Synageva BioPharma Corp.

Mark J. Enyedy

President and 

Richard Gregory, PhD

Executive Vice President, 

Chief Scientifi c Offi cer

David B. Johnston

Executive Vice President and 

Chief Financial Offi cer

John M. Lambert, PhD

Executive Vice President and 

Distinguished Research Fellow

Former President and Chief Executive 

Offi cer, ImmunoGen, Inc.

Sandra E. Poole

Executive Vice President, 

Dean J. Mitchell

Executive Chairman of the Board, 

Covis Pharma Holdings S.a.r.l.

Technical and Commercial Operations

Craig Barrows

and Secretary

Vice President, General Counsel 

Nicole Onetto, MD, MSc

Former Deputy Director and 

Chief Scientifi c Offi cer, 

Ontario Institute for Cancer Research

Peter J. Williams

Vice President, 

Business Development

Kristine Peterson

Former Chief Executive Offi cer, 

Valeritas, Inc.

Howard H. Pien

Former Chairman and Chief Executive

Offi cer, Medarex, Inc.

Joseph J. Villafranca, PhD

President, 

BioPharmaceutical Consultants, LLC

Richard J. Wallace

Former Senior Vice President

Research and Development, 

GlaxoSmithKline plc 

ImmunoGen, Inc.

830 Winter Street

Waltham, MA 02451

781-895-0600

www.immunogen.com

Annual Meeting

11:00 AM on December 9, 2016

at the offi ces of the Company

830 Winter Street

Waltham, MA 02451

Stock Transfer Agent

and Registrar

Broadridge Corporate Issuer 

Solutions, Inc.

P.O. Box 1342

Brentwood, NY 11717

Phone: 877-830-4936

Fax: 215-553-5402

Email: shareholder@broadridge.com

Auditors

Ernst & Young LLP

Boston, MA

Shareholder Inquiries

Information about ImmunoGen can 

be found at www.immunogen.com. 

Inquiries related to the Company may 

be directed to the Investor Relations 

department at our headquarters. 

Communications related to stock and 

transfer requirements, including lost 

stock certifi cates and change of name 

or address, should be directed to the 

Transfer Agent.

Amgen

AMG Undisclosed

CytomX

CX-2009 | CD166

Takeda

TBD | GCC

* DLBCL: Diffuse large B-cell lymphoma. † Naked antibody; all other compounds are ADCs

Entered clinic in 2015

This  annual  report  includes  forward-looking  statements  based  on  management’s  current  expectations.  These  statements  include,  but  are  not  limited  to,  ImmunoGen’s  expectations  related  to 

the advancement of new Company and partner compounds into clinical testing, the initiation of new clinical trials, the timing of next-step clinical decisions, and the timing and occurrence of the 

presentation of new preclinical and clinical data, of potential business development events, and of potential future regulatory submissions. For these statements, ImmunoGen claims the protection 

of 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 

annual report. 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 partners’ 

research and clinical development processes; the diffi culties 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 fi nancially 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 fi scal year ended June 30, 2016 and other reports fi led with the Securities and Exchange Commission.

Avastin®, Kadcyla®, Keytruda® and Rituxan® are registered trademarks of their respective owners.

Dear(cid:3)Shareholders,(cid:3)(cid:3)

I(cid:3)joined(cid:3)ImmunoGen(cid:3)in(cid:3)May(cid:3)of(cid:3)this(cid:3)year(cid:3)and(cid:3)am(cid:3)pleased(cid:3)to(cid:3)share(cid:3)with(cid:3)you(cid:3)the(cid:3)significant(cid:3)progress(cid:3)we(cid:3)
have(cid:3)made(cid:3)with(cid:3)the(cid:3)business(cid:3)over(cid:3)the(cid:3)last(cid:3)several(cid:3)months.(cid:3)(cid:3)(cid:3)

Positioned(cid:3)for(cid:3)Sustainable(cid:3)Value(cid:3)Creation(cid:3)

Biotech(cid:3)is(cid:3)a(cid:3)knowledge(cid:882)based(cid:3)sector(cid:3)and(cid:3)success(cid:3)in(cid:3)our(cid:3)business(cid:3)begins(cid:3)with(cid:3)great(cid:3)people.(cid:3)I(cid:3)have(cid:3)
inherited(cid:3)a(cid:3)strong(cid:3)team(cid:3)at(cid:3)ImmunoGen,(cid:3)both(cid:3)home(cid:882)grown(cid:3)and(cid:3)drawn(cid:3)from(cid:3)premier(cid:3)companies(cid:3)across(cid:3)
the(cid:3)industry,(cid:3)with(cid:3)deep(cid:3)experience(cid:3)in(cid:3)developing,(cid:3)manufacturing,(cid:3)and(cid:3)commercializing(cid:3)oncology(cid:3)
therapies.(cid:3)That(cid:3)team(cid:3)has(cid:3)established(cid:3)a(cid:3)leadership(cid:3)position(cid:3)in(cid:3)Antibody(cid:882)Drug(cid:3)Conjugates(cid:3)(ADCs),(cid:3)which(cid:3)
are(cid:3)an(cid:3)increasingly(cid:3)important(cid:3)approach(cid:3)to(cid:3)cancer(cid:3)therapy(cid:3)with(cid:3)the(cid:3)number(cid:3)of(cid:3)agents(cid:3)in(cid:3)development(cid:3)
more(cid:3)than(cid:3)doubling(cid:3)over(cid:3)the(cid:3)last(cid:3)5(cid:3)years.(cid:3)(cid:3)(cid:3)

To(cid:3)this(cid:3)growing(cid:3)field,(cid:3)ImmunoGen(cid:3)brings(cid:3)a(cid:3)robust(cid:3)portfolio(cid:3)of(cid:3)clinical(cid:3)candidates(cid:3)and(cid:3)continued(cid:3)
innovation(cid:3)with(cid:3)ADC(cid:3)technologies.(cid:3)Our(cid:3)portfolio(cid:3)is(cid:3)led(cid:3)by(cid:3)mirvetuximab(cid:3)soravtansine,(cid:3)a(cid:3)first(cid:882)in(cid:882)class(cid:3)ADC(cid:3)
entering(cid:3)Phase(cid:3)3(cid:3)development(cid:3)for(cid:3)platinum(cid:882)resistant(cid:3)ovarian(cid:3)cancer.(cid:3)Behind(cid:3)mirvetuximab,(cid:3)we(cid:3)have(cid:3)
built(cid:3)a(cid:3)productive(cid:3)platform(cid:3)that(cid:3)continues(cid:3)to(cid:3)generate(cid:3)differentiated(cid:3)products(cid:3)such(cid:3)as(cid:3)our(cid:3)IGN(cid:3)
programs,(cid:3)which(cid:3)we(cid:3)are(cid:3)initially(cid:3)pursing(cid:3)for(cid:3)hematological(cid:3)malignancies.(cid:3)(cid:3)(cid:3)

Levering(cid:3)this(cid:3)platform,(cid:3)we(cid:3)have(cid:3)entered(cid:3)into(cid:3)high(cid:882)value(cid:3)partnerships(cid:3)with(cid:3)a(cid:3)number(cid:3)of(cid:3)leading(cid:3)
biopharmaceutical(cid:3)companies,(cid:3)including(cid:3)Bayer,(cid:3)Lilly,(cid:3)Novartis,(cid:3)Roche,(cid:3)Sanofi,(cid:3)and(cid:3)Takeda.(cid:3)Collectively,(cid:3)
these(cid:3)partnerships(cid:3)have(cid:3)produced(cid:3)one(cid:3)of(cid:3)the(cid:3)first(cid:3)approved(cid:3)ADC(cid:3)products,(cid:3)Roche’s(cid:3)Kadcyla®,(cid:3)and(cid:3)nine(cid:3)
clinical(cid:3)candidates(cid:3)currently(cid:3)in(cid:3)development(cid:3)that(cid:3)integrate(cid:3)our(cid:3)technology.(cid:3)(cid:3)

With(cid:3)this(cid:3)combination(cid:3)of(cid:3)talented(cid:3)people,(cid:3)robust(cid:3)portfolio,(cid:3)productive(cid:3)platform,(cid:3)and(cid:3)a(cid:3)strong(cid:3)cash(cid:3)
balance,(cid:3)ImmunoGen(cid:3)today(cid:3)is(cid:3)well(cid:882)positioned(cid:3)for(cid:3)sustainable(cid:3)value(cid:3)creation(cid:3)for(cid:3)our(cid:3)patients,(cid:3)
employees,(cid:3)and(cid:3)shareholders.(cid:3)(cid:3)

Strategic(cid:3)Direction(cid:3)and(cid:3)Priorities(cid:3)(cid:3)

Realizing(cid:3)on(cid:3)the(cid:3)promise(cid:3)of(cid:3)this(cid:3)business(cid:3)requires(cid:3)clear(cid:3)strategic(cid:3)direction(cid:3)and(cid:3)priorities.(cid:3)Our(cid:3)goal(cid:3)is(cid:3)to(cid:3)
build(cid:3)a(cid:3)fully(cid:882)integrated(cid:3)biotech(cid:3)company(cid:3)that(cid:3)delivers(cid:3)innovative(cid:3)ADC(cid:3)therapies(cid:3)to(cid:3)cancer(cid:3)patients(cid:3)
around(cid:3)the(cid:3)globe.(cid:3)To(cid:3)attain(cid:3)this(cid:3)goal,(cid:3)we(cid:3)have(cid:3)focused(cid:3)on(cid:3)four(cid:3)strategic(cid:3)priorities:(cid:3)

(cid:120)

(cid:120)

(cid:120)

(cid:120)

Execute(cid:3)on(cid:3)a(cid:3)speed(cid:882)to(cid:882)market(cid:3)strategy(cid:3)to(cid:3)complete(cid:3)development(cid:3)and(cid:3)obtain(cid:3)full(cid:3)approval(cid:3)for(cid:3)
mirvetuximab(cid:3)in(cid:3)platinum(cid:882)resistant(cid:3)ovarian(cid:3)cancer;(cid:3)(cid:3)
Accelerate(cid:3)the(cid:3)development(cid:3)of(cid:3)our(cid:3)earlier(cid:882)stage(cid:3)portfolio,(cid:3)with(cid:3)an(cid:3)emphasis(cid:3)on(cid:3)ADCs(cid:3)deploying(cid:3)
our(cid:3)new(cid:3)“IGN”(cid:3)DNA(cid:882)acting(cid:3)payloads;(cid:3)(cid:3)
Continue(cid:3)to(cid:3)drive(cid:3)innovation(cid:3)in(cid:3)ADCs(cid:3)through(cid:3)our(cid:3)unmatched(cid:3)breadth(cid:3)and(cid:3)depth(cid:3)of(cid:3)expertise(cid:3)in(cid:3)
new(cid:3)payloads,(cid:3)linkers,(cid:3)and(cid:3)methods(cid:3)of(cid:3)conjugation;(cid:3)and(cid:3)
Lever(cid:3)our(cid:3)platform(cid:3)to(cid:3)support(cid:3)our(cid:3)existing(cid:3)partnerships(cid:3)and(cid:3)pursue(cid:3)new(cid:3)collaborations(cid:3)that(cid:3)
generate(cid:3)revenue,(cid:3)mitigate(cid:3)expenses,(cid:3)enhance(cid:3)our(cid:3)capabilities,(cid:3)and(cid:3)–(cid:3)most(cid:3)importantly(cid:3)–(cid:3)
expand(cid:3)the(cid:3)reach(cid:3)of(cid:3)our(cid:3)innovation(cid:3)to(cid:3)more(cid:3)patients.(cid:3)(cid:3)(cid:3)

Having(cid:3)defined(cid:3)our(cid:3)direction(cid:3)and(cid:3)priorities,(cid:3)we(cid:3)recently(cid:3)completed(cid:3)a(cid:3)strategic(cid:3)review(cid:3)of(cid:3)our(cid:3)operations(cid:3)
designed(cid:3)to(cid:3)strengthen(cid:3)the(cid:3)organization(cid:3)and(cid:3)drive(cid:3)long(cid:882)term(cid:3)growth.(cid:3)This(cid:3)effort(cid:3)entailed(cid:3)a(cid:3)
comprehensive(cid:3)assessment(cid:3)of(cid:3)our(cid:3)core(cid:3)functions(cid:3)as(cid:3)well(cid:3)as(cid:3)the(cid:3)prioritization(cid:3)of(cid:3)our(cid:3)portfolio.(cid:3)Based(cid:3)
upon(cid:3)this(cid:3)review,(cid:3)we(cid:3)have(cid:3)restructured(cid:3)our(cid:3)technical(cid:3)operations,(cid:3)substantially(cid:3)reduced(cid:3)G&A,(cid:3)and(cid:3)
revised(cid:3)our(cid:3)approach(cid:3)to(cid:3)managing(cid:3)clinical(cid:3)trials.(cid:3)By(cid:3)adapting(cid:3)how(cid:3)we(cid:3)work(cid:3)and(cid:3)aligning(cid:3)on(cid:3)our(cid:3)key(cid:3)
programs,(cid:3)we(cid:3)will(cid:3)execute(cid:3)more(cid:3)effectively(cid:3)and(cid:3)efficiently(cid:3)on(cid:3)our(cid:3)strategic(cid:3)objectives(cid:3)and(cid:3)extend(cid:3)our(cid:3)
cash(cid:3)position(cid:3)into(cid:3)mid(cid:882)2018.(cid:3)

Leadership(cid:3)in(cid:3)ADCs:(cid:3)Building(cid:3)Momentum(cid:3)

We(cid:3)have(cid:3)established(cid:3)a(cid:3)leadership(cid:3)position(cid:3)in(cid:3)ADCs(cid:3)and(cid:3)will(cid:3)build(cid:3)on(cid:3)that(cid:3)position(cid:3)by(cid:3)delivering(cid:3)on(cid:3)our(cid:3)
proprietary(cid:3)programs,(cid:3)supporting(cid:3)our(cid:3)partners,(cid:3)and(cid:3)continuing(cid:3)to(cid:3)innovate.(cid:3)Our(cid:3)internal(cid:3)pipeline(cid:3)offers(cid:3)
a(cid:3)diversified(cid:3)and(cid:3)differentiated(cid:3)portfolio(cid:3)of(cid:3)novel(cid:3)ADCs(cid:3)addressing(cid:3)both(cid:3)solid(cid:3)tumors(cid:3)and(cid:3)hematological(cid:3)
malignancies.(cid:3)We(cid:3)have(cid:3)made(cid:3)significant(cid:3)progress(cid:3)with(cid:3)this(cid:3)portfolio(cid:3)in(cid:3)recent(cid:3)months,(cid:3)including:(cid:3)

(cid:120) Mirvetuximab(cid:3)Soravtansine.(cid:3)We(cid:3)held(cid:3)a(cid:3)positive(cid:3)meeting(cid:3)with(cid:3)the(cid:3)FDA(cid:3)to(cid:3)review(cid:3)our(cid:3)planned(cid:3)

Phase(cid:3)3(cid:3)trial,(cid:3)FORWARD(cid:3)I,(cid:3)to(cid:3)support(cid:3)registration(cid:3)of(cid:3)mirvetuximab(cid:3)in(cid:3)platinum(cid:882)resistant(cid:3)ovarian(cid:3)
cancer.(cid:3)Based(cid:3)on(cid:3)the(cid:3)guidance(cid:3)provided(cid:3)by(cid:3)the(cid:3)agency,(cid:3)we(cid:3)will(cid:3)initiate(cid:3)FORWARD(cid:3)I(cid:3)as(cid:3)designed(cid:3)
and(cid:3)expect(cid:3)to(cid:3)enroll(cid:3)the(cid:3)first(cid:3)patient(cid:3)in(cid:3)this(cid:3)study(cid:3)before(cid:3)the(cid:3)end(cid:3)of(cid:3)the(cid:3)year.(cid:3)In(cid:3)addition,(cid:3)we(cid:3)
advanced(cid:3)our(cid:3)FORWARD(cid:3)II(cid:3)mirvetuximab(cid:3)combination(cid:3)studies,(cid:3)with(cid:3)dose(cid:3)escalation(cid:3)complete(cid:3)in(cid:3)
the(cid:3)Avastin®(cid:3)arm(cid:3)and(cid:3)the(cid:3)first(cid:3)patient(cid:3)dosed(cid:3)in(cid:3)September(cid:3)with(cid:3)Keytuda®(cid:3)under(cid:3)our(cid:3)
collaboration(cid:3)with(cid:3)Merck.(cid:3)We(cid:3)expect(cid:3)to(cid:3)begin(cid:3)reporting(cid:3)data(cid:3)from(cid:3)FORWARD(cid:3)II(cid:3)in(cid:3)mid(cid:882)2017.(cid:3)(cid:3)
IGN(cid:3)Programs.(cid:3)We(cid:3)also(cid:3)accelerated(cid:3)the(cid:3)development(cid:3)of(cid:3)our(cid:3)earlier(cid:882)stage(cid:3)portfolio(cid:3)of(cid:3)highly(cid:3)
innovative(cid:3)IGN(cid:3)programs(cid:3)–(cid:3)IMGN779(cid:3)for(cid:3)Acute(cid:3)Myeloid(cid:3)Leukemia(cid:3)and(cid:3)IMGN632(cid:3)for(cid:3)
hematological(cid:3)malignancies.(cid:3)We(cid:3)enrolled(cid:3)our(cid:3)first(cid:3)patient(cid:3)in(cid:3)the(cid:3)IMGN779(cid:3)Phase(cid:3)I(cid:3)study(cid:3)this(cid:3)
year(cid:3)and(cid:3)expect(cid:3)to(cid:3)begin(cid:3)reporting(cid:3)clinical(cid:3)data(cid:3)from(cid:3)this(cid:3)program(cid:3)in(cid:3)2017.(cid:3)Preclinical(cid:3)data(cid:3)for(cid:3)
both(cid:3)programs(cid:3)will(cid:3)also(cid:3)be(cid:3)presented(cid:3)at(cid:3)the(cid:3)2016(cid:3)ASH(cid:3)Annual(cid:3)Meeting(cid:3)in(cid:3)December.(cid:3)
B(cid:882)Cell(cid:3)Programs.(cid:3)(cid:3)We(cid:3)have(cid:3)generated(cid:3)striking(cid:3)preclinical(cid:3)data(cid:3)with(cid:3)IMGN529(cid:3)and(cid:3)this(cid:3)year(cid:3)
initiated(cid:3)a(cid:3)Phase(cid:3)2(cid:3)study(cid:3)with(cid:3)this(cid:3)ADC(cid:3)in(cid:3)combination(cid:3)with(cid:3)Rituxan®.(cid:3)In(cid:3)connection(cid:3)with(cid:3)our(cid:3)
recently(cid:3)completed(cid:3)strategic(cid:3)review,(cid:3)we(cid:3)have(cid:3)taken(cid:3)the(cid:3)decision(cid:3)to(cid:3)monetize(cid:3)this(cid:3)program(cid:3)along(cid:3)
with(cid:3)coltuximab(cid:3)ravtansine(cid:3)through(cid:3)partnering(cid:3)with(cid:3)interested(cid:3)parties.(cid:3)

(cid:120)

(cid:120)

Levering(cid:3)our(cid:3)Platform(cid:3)for(cid:3)Continued(cid:3)Innovation(cid:3)and(cid:3)High(cid:882)Value(cid:3)Partnerships(cid:3)

Extending(cid:3)our(cid:3)leadership(cid:3)position(cid:3)in(cid:3)ADCs(cid:3)will(cid:3)require(cid:3)continued(cid:3)innovation.(cid:3)To(cid:3)that(cid:3)end,(cid:3)we(cid:3)have(cid:3)
developed(cid:3)the(cid:3)industry’s(cid:3)most(cid:3)comprehensive(cid:3)toolbox(cid:3)of(cid:3)ADC(cid:3)technologies(cid:3)–(cid:3)linkers,(cid:3)payloads,(cid:3)and(cid:3)
methods(cid:3)of(cid:3)conjugation.(cid:3)These(cid:3)tools(cid:3)have(cid:3)translated(cid:3)into(cid:3)material(cid:3)advances(cid:3)in(cid:3)the(cid:3)ADC(cid:3)field,(cid:3)including:(cid:3)

(cid:120)

(cid:120)

Kadcyla(cid:3)–(cid:3)deploying(cid:3)our(cid:3)DM1(cid:3)payload(cid:3)and(cid:3)one(cid:3)of(cid:3)our(cid:3)non(cid:882)cleavable(cid:3)linkers(cid:3)as(cid:3)the(cid:3)first(cid:3)ADC(cid:3)to(cid:3)
demonstrate(cid:3)a(cid:3)survival(cid:3)benefit(cid:3)in(cid:3)solid(cid:3)tumors;(cid:3)
Anetumab(cid:3)ravtansine(cid:3)–(cid:3)integrating(cid:3)our(cid:3)DM4(cid:3)payload(cid:3)with(cid:3)one(cid:3)of(cid:3)our(cid:3)cleavable(cid:3)linkers(cid:3)and(cid:3)now(cid:3)
in(cid:3)a(cid:3)registration(cid:882)enabling(cid:3)Phase(cid:3)2(cid:3)trial(cid:3)for(cid:3)the(cid:3)treatment(cid:3)of(cid:3)mesothelioma;(cid:3)and(cid:3)

(cid:120) Mirvetuximab(cid:3)soravtansine(cid:3)–(cid:3)using(cid:3)our(cid:3)DM4(cid:3)payload(cid:3)with(cid:3)a(cid:3)new,(cid:3)charged(cid:3)linker(cid:3)we(cid:3)developed(cid:3)

to(cid:3)counter(cid:3)multi(cid:882)drug(cid:3)resistance.(cid:3)(cid:3)(cid:3)

Building(cid:3)on(cid:3)this(cid:3)strong(cid:3)legacy,(cid:3)we(cid:3)will(cid:3)continue(cid:3)to(cid:3)apply(cid:3)this(cid:3)expertise(cid:3)to(cid:3)extend(cid:3)the(cid:3)reach(cid:3)of(cid:3)ADCs(cid:3)to(cid:3)
multiple(cid:3)cancers(cid:3)within(cid:3)both(cid:3)solid(cid:3)tumors(cid:3)and(cid:3)hematological(cid:3)malignancies.(cid:3)

Partnerships(cid:3)remain(cid:3)a(cid:3)core(cid:3)component(cid:3)of(cid:3)our(cid:3)strategy.(cid:3)These(cid:3)relationships(cid:3)allow(cid:3)us(cid:3)to(cid:3)enhance(cid:3)and(cid:3)
diversify(cid:3)our(cid:3)expertise,(cid:3)gain(cid:3)access(cid:3)to(cid:3)supplemental(cid:3)capabilities,(cid:3)and(cid:3)expand(cid:3)our(cid:3)approach(cid:3)to(cid:3)therapy(cid:3)to(cid:3)
a(cid:3)broader(cid:3)range(cid:3)of(cid:3)patient(cid:3)populations.(cid:3)Takeda,(cid:3)for(cid:3)example,(cid:3)is(cid:3)developing(cid:3)a(cid:3)GCC(cid:882)targeting(cid:3)ADC(cid:3)with(cid:3)
one(cid:3)of(cid:3)our(cid:3)DNA(cid:882)acting(cid:3)agents(cid:3)that(cid:3)will(cid:3)extend(cid:3)this(cid:3)technology(cid:3)into(cid:3)solid(cid:3)tumors.(cid:3)Partnerships(cid:3)have(cid:3)also(cid:3)
generated(cid:3)significant(cid:3)revenue(cid:3)for(cid:3)ImmunoGen(cid:3)and,(cid:3)going(cid:3)forward,(cid:3)we(cid:3)expect(cid:3)to(cid:3)use(cid:3)collaborations(cid:3)to(cid:3)
provide(cid:3)a(cid:3)measure(cid:3)of(cid:3)risk(cid:882)(cid:3)and(cid:3)cost(cid:882)sharing.(cid:3)(cid:3)(cid:3)(cid:3)(cid:3)

Transforming(cid:3)ImmunoGen(cid:3)for(cid:3)the(cid:3)Future(cid:3)

With(cid:3)the(cid:3)benefit(cid:3)of(cid:3)the(cid:3)changes(cid:3)we(cid:3)have(cid:3)made(cid:3)to(cid:3)transform(cid:3)the(cid:3)business(cid:3)over(cid:3)the(cid:3)last(cid:3)several(cid:3)months,(cid:3)I(cid:3)
am(cid:3)confident(cid:3)that(cid:3)ImmunoGen(cid:3)will(cid:3)create(cid:3)sustainable(cid:3)value(cid:3)for(cid:3)shareholders.(cid:3)(cid:3)

As(cid:3)we(cid:3)look(cid:3)forward(cid:3)to(cid:3)the(cid:3)coming(cid:3)year,(cid:3)I(cid:3)thank(cid:3)the(cid:3)dedicated(cid:3)people(cid:3)at(cid:3)ImmunoGen(cid:3)whose(cid:3)diligent(cid:3)
efforts(cid:3)have(cid:3)driven(cid:3)the(cid:3)progress(cid:3)we(cid:3)have(cid:3)made(cid:3)and(cid:3)will(cid:3)enable(cid:3)us(cid:3)to(cid:3)achieve(cid:3)our(cid:3)mission(cid:3)of(cid:3)delivering(cid:3)
innovative(cid:3)therapies(cid:3)that(cid:3)meaningfully(cid:3)improve(cid:3)the(cid:3)lives(cid:3)of(cid:3)cancer(cid:3)patients.(cid:3)(cid:3)

Sincerely,(cid:3)

(cid:3)

Mark(cid:3)J.(cid:3)Enyedy(cid:3)
President(cid:3)and(cid:3)CEO(cid:3)
October(cid:3)28,(cid:3)2016(cid:3)

(This page has been left blank intentionally.)

UNITED STATES 
SECURITIES AND EXCHANGE COMMISSION 
Washington, D.C. 20549 
Form 10-K 

(cid:95) 

(cid:134) 

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES 
EXCHANGE ACT OF 1934 

For the fiscal year ended June 30, 2016 
OR 
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE 
SECURITIES EXCHANGE ACT OF 1934 

For the transition period from              to              

Commission file number 0-17999 
ImmunoGen, Inc. 

Massachusetts 

(State or other jurisdiction 
of incorporation or organization) 

04-2726691 
(I.R.S. Employer 
Identification No.) 

830 Winter Street, Waltham, MA 02451 

(Address of principal executive offices, including zip code) 

(Registrant’s telephone number, including area code) 

(781) 895-0600 

Securities registered pursuant to Section 12(b) of the Act: 

Title of Each Class 
Common Stock, $.01 par value 

Name of Each Exchange on Which Registered 
NASDAQ Global Select Market 

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities 

Act. (cid:134) Yes  (cid:95) No 

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the 

Act. (cid:134) Yes  (cid:95) No 

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the 

Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file 
such reports), and (2) has been subject to such filing requirements for the past 90 days. (cid:95) Yes  (cid:134) No 

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Website, if any, every 
Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§229.405 of this chapter) during the 
preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). (cid:95) Yes  (cid:134) No 

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) 
is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements 
incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. (cid:134) 

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a 

smaller reporting company. See definitions of “large accelerated filer,” “accelerated filer,” and “smaller reporting company” in 
Rule 12b-2 of the Exchange Act. (Check one): 
Large accelerated filer (cid:95) 

Accelerated filer (cid:134) 

Smaller reporting company (cid:134)

Non-accelerated filer (cid:134) 
(Do not check if a smaller reporting company) 

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). (cid:134) Yes  

(cid:95) No 

Aggregate market value, based upon the closing sale price of the shares as reported by the NASDAQ Global Select Market, 

of voting stock held by non- affiliates at December 31, 2015: $1,176,154,266 (excludes shares held by executive officers and 
directors). Exclusion of shares held by any person should not be construed to indicate that such person possesses the power, direct or 
indirect, to direct or cause the direction of management or policies of the registrant, or that such person is controlled by or under 
common control with the registrant. Common Stock outstanding at August 18, 2016: 87,326,441 shares. 

DOCUMENTS INCORPORATED BY REFERENCE 
Portions of the definitive Proxy Statement to be delivered to shareholders in connection with the Annual Meeting of 

Shareholders to be held on November 4, 2016 are incorporated by reference into Part III. 

 
 
    
 
 
Item 

ImmunoGen, Inc. 

Form 10-K 

TABLE OF CONTENTS 

Part I 

  Business  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. 
1A.    Risk Factors  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1B.    Unresolved Staff Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. 
  Properties  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  Legal Proceedings  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. 
  Executive Officers of the Registrant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 
  Mine Safety Disclosures  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4. 

Part II 

5. 

  Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity 

Securities  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6. 
  Selected Financial Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  Management’s Discussion and Analysis of Financial Condition and Results of Operations . . . . . . . . . . . . . .
7. 
7A.    Quantitative and Qualitative Disclosures About Market Risk  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  Financial Statements and Supplementary Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8. 
9. 
  Changes in and Disagreements with Accountants on Accounting and Financial Disclosure . . . . . . . . . . . . . .
9A.    Controls and Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9B.    Other Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10. 
11. 
12. 
13. 
14. 

15. 

Part III 

  Directors, Executive Officers and Corporate Governance  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  Executive Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters  . . . .
  Certain Relationships and Related Transactions, and Director Independence . . . . . . . . . . . . . . . . . . . . . . . . . .
  Principal Accounting Fees and Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

  Exhibits, Financial Statement Schedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
  Signatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Part IV 

Page
Number

3
25
38
38
38
38
39

40
41
42
55
56
97
97
100

100
100
100
100
100

100
101

2 

     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Item 1.    Business 

In this Annual Report on Form 10-K, ImmunoGen, Inc. (ImmunoGen, Inc., together with its subsidiaries, is 

referred to in this document as “we”, “our”, “us”, “ImmunoGen”, or the “Company”), incorporates by reference certain 
information from parts of other documents filed with the Securities and Exchange Commission. The Securities and 
Exchange Commission allows us to disclose important information by referring to it in that manner. Please refer to all 
such information when reading this Annual Report on Form 10-K. All information is as of June 30, 2016 unless 
otherwise indicated. For a description of the risk factors affecting or applicable to our business, see “Risk Factors,” 
below. 

Company overview  

ImmunoGen is a clinical-stage biotechnology company that develops targeted cancer therapeutics using our 
proprietary antibody-drug conjugate, or ADC, technology. An ADC with our technology comprises an antibody that 
binds to a target found on tumor cells conjugated to one of our potent anti-cancer agents as a “payload” to kill the tumor 
cell once the ADC has bound to its target. ADCs are an expanding approach to the treatment of cancer, with two 
approved products and the number of agents in development more than doubling during the last five years. 

We have established a leadership position in ADCs. Our technology is deployed in Roche’s Kadcyla® (ado-
trastuzumab emtansine), the first ADC to demonstrate superiority over standard of care in a randomized pivotal trial, 
EMILIA, and gain FDA approval. Following Kadcyla are 12 clinical-stage ADCs with our technology: four wholly-
owned by us and eight through our partnerships with Amgen, Bayer, Biotest, Lilly, Novartis, and Sanofi.  

Our proprietary portfolio is led by mirvetuximab soravtansine, a first-in-class ADC targeting folate-receptor 

alpha, or FR(cid:302). Following a meeting with the U.S. Food and Drug Administration, or FDA, in July 2016, we are initiating 
a Phase 3 registration trial, FORWARD I, with mirvetuximab soravtansine for use as single-agent therapy to treat 
patients with platinum-resistant ovarian cancer whose tumors express high or medium levels of FR(cid:302) and who have 
received up to three prior treatment regimens. Additionally, we are accruing patients in a companion study, FORWARD 
II, to evaluate mirvetuximab soravtansine in combination regimens to expand the number of patients with ovarian cancer 
eligible for treatment with the ADC. FORWARD II consists of cohorts assessing mirvetuximab soravtansine in 
combination with, in separate doublets, Avastin® (bevacizumab), pegylated liposomal doxorubicin, or PLD, and 
carboplatin. We have also entered into a collaboration with Merck under which Merck will provide Keytruda® 
(pembrolizumab) for evaluation in combination with mirvetuximab soravtansine as part of the FORWARD II study. We 
expect to begin reporting clinical findings from FORWARD II in the second quarter of 2017. 

We have built a productive platform that continues to generate innovative and proprietary ADCs, including 

IMGN779, our CD33-targeting product candidate for acute myeloid leukemia, or AML. IMGN779 integrates one of our 
new DNA-alkylating IGN payload agents and is progressing through dose escalation in a Phase 1 trial in AML. We also 
are advancing IMGN632, a preclinical CD123-targeting ADC that uses an even more potent IGN payload agent with a 
new engineered linker and novel antibody, which we are developing for hematological malignancies including AML. 

In addition to fueling our organic growth, we also selectively license limited rights to use of our ADC 

technology to other companies. These licenses can provide us with cash through upfront and milestone payments, 
research and manufacturing support payments, and royalties on commercial sales, if any, as well as access to 
complementary technology and capabilities. The most advanced partner program is Roche’s marketed product, Kadcyla. 

Our strategy 

Our goal is to build a fully-integrated company capable of delivering innovative ADC therapies to cancer 

patients around the globe. We will attain this goal this goal by focusing on four strategic priorities:  

•  Complete development and commercialize mirvetuximab soravtansine. We are committed to executing on a 
speed-to-market strategy to complete development and obtain full approval for our lead program in platinum-
resistant ovarian cancer. We have reviewed with the FDA the planned path to registration for mirvetuximab 
soravtansine and the design of our proposed Phase 3 trial, FORWARD I. With the benefit of the guidance 
provided by FDA, we are moving ahead with the study as designed and expect to enroll our first patient before 
year end.  

3 

•  Accelerate the development of our earlier-stage portfolio. We will prioritize product candidates with the highest 
potential for differentiation and, to this end, have emphasized ADCs deploying our new DNA-acting payload. 
With a potentially broad therapeutic index, we believe we can increase the number of cancers addressable by 
ADC therapies with this technology.   

•  Continue to drive innovation in ADCs. We have generated significant expertise in understanding the factors that 
drive successful development of ADCs. This understanding has produced a comprehensive set of capabilities 
for antibody, linker, and payload development and ADC manufacturing. We have paired this platform with an 
in-house team experienced in developing and commercializing oncology products from the bench to the patient. 
We believe this depth of know-how, capabilities, and experience has positioned us for sustained leadership in 
ADCs for oncology.    

•  Lever partnerships to extend the impact of innovation. We will continue to lever our platform to support our 

existing relationships and pursue new collaborations that expand the reach of our innovation, generate revenue, 
mitigate expenses, and expand our capabilities to enable more patients to be treated with ADCs deploying our 
technology.   

Having defined our strategic direction and corporate priorities, we have initiated a comprehensive review of our 
operations to ensure that we execute efficiently across the business and most effectively manage our cash. We expect to 
complete this review and communicate a revised operating plan before the end of 2016. 

ADCs and our technology platform 

ADCs represent an increasingly important approach to cancer therapy for both solid tumors and hematological 

malignancies. In addition to two FDA-approved ADCs, the number of ADCs in development has more than doubled 
during the last five years to over 50 clinical candidates sponsored by more than 20 companies including Bayer, Lilly, 
Novartis, Pfizer, Roche, and Takeda. Twelve of these 50 candidates utilize ImmunoGen’s technology, with additional 
ADCs in preclinical development. 

Our ADC platform technology combines advanced chemistry and biochemistry with innovative approaches to 
antibody optimization and engineering to generate novel product candidates designed to offer improved efficacy and/or 
tolerability for an expanding array of malignancies. Our platform-innovation programs focus primarily on increasing the 
diversity and potency of our payload agents, advancing antibody-payload linkage and release technologies, and 
integration of novel approaches to antibody engineering.    

We have developed tubulin-acting maytansinoid payload agents, which include DM1 and DM4. Our 
maytansinoid technology is utilized in Kadcyla, mirvetuximab soravtansine, anetumab ravtansine, and all other ADCs in 
development by us and our partners that entered the clinic prior to 2016. Recent laboratory studies conducted by 
ImmunoGen and academics indicate that maytansinoid ADCs can promote the maturation and activation of antigen-
presenting dendritic cells and help potentiate the effect of immuno-oncology agents. We have entered into a 
collaboration with Merck to assess mirvetuximab soravtansine in combination with Merck’s Keytruda in our Phase 1b/2 
FORWARD II trial. 

We also have developed a new class of DNA-acting payload agents, our indolino-benzodiazepines, which we 

call IGNs. Our IGNs alkylate DNA without cross-linking it, which we have found to provide important tolerability 
benefits in preclinical models. Our IMGN779 and IMGN632 product candidates utilize our IGN payload agents, as does 
Takeda’s new GCC-targeting ADC. IGNs have the potential to markedly expand the opportunity for ADCs by enabling 
the development of effective, well-tolerated therapies for antigen targets not suitable for tubulin-acting approaches (e.g., 
due to limited antigen density or insensitivity to the mechanism of action). 

Other enabling technologies in our portfolio include our growing array of stable engineered linkers, which 

direct the release and activation of the payload agent inside the cancer cell, alternative methods of site-specific and non-
site-specific attachment of payload to antibody, and alternative antibody assessment, engineering and targeting 
approaches. Our technology portfolio is designed to enable achievement of the most active, well-tolerated ADC for the 
target. In addition, we are collaborating with companies such as CytomX to gain access to novel approaches to antibody 
engineering such as masking technology.  

4 

Our product candidates 

The following table depicts the current status of our product candidates in or near human clinical development 

and for which we retain all commercial rights: 

ImmunoGen Wholly-Owned 
Product Candidate 

Target 

Lead Indication 

Lead Stage 

Mirvetuximab soravtansine . . . .    FR(cid:302) 
IMGN529  . . . . . . . . . . . . . . . . .    CD37 
Coltuximab ravtansine . . . . . . . .    CD19 
IMGN779  . . . . . . . . . . . . . . . . .    CD33 
IMGN632  . . . . . . . . . . . . . . . . .    CD123 

  Platinum-resistant ovarian cancer 
  DLBCL 
  DLBCL 
  AML 
  AML 

  Advancing to Phase 3 registration testing  
  Phase 2 
  Phase 2 
  Phase 1 
  Preclinical 

Mirvetuximab soravtansine  

Mirvetuximab soravtansine is the first ADC to target FR(cid:302), which is highly expressed on many ovarian cancers 

and some other types of solid tumors. Mirvetuximab soravtansine comprises an FR(cid:302)-binding antibody that serves to 
target the ADC to FR(cid:302)-positive cancer cells and our potent DM4 payload agent to kill the targeted cells. It is a potential 
treatment for FR(cid:302)-positive solid tumors including ovarian cancer and has been granted orphan drug status for ovarian 
cancer in the U.S. and the European Union, or the EU.  

Ovarian cancer – need for new treatment options 

According to the World Health Organization, approximately 240,000 new cases of ovarian cancer are diagnosed 

globally each year. Ovarian cancer has the most deaths per year among gynecologic cancers, with the majority of 
patients diagnosed at an advanced stage.  

Standard first-line therapy for ovarian cancer in the U.S. is a platinum-based regimen (e.g., carboplatin plus a 

taxane and potentially additional agents). Once the cancer becomes platinum resistant, a wide array of treatments may be 
used. Response rates with single-agent therapies (e.g., PLD, paclitaxel, topotecan) are limited – typically around 15% to 
20%, with median progression-free survival, or PFS, of 3.5 to 4 months. 

Mirvetuximab soravtansine initial clinical testing 

We initiated Phase 1 testing of mirvetuximab soravtansine to assess, among other factors, its safety, tolerability, 

and maximum tolerated dose, and to provide initial information on its anti-tumor activity. In the dose-finding stage, 
evidence of activity was seen in patients with FR(cid:302)-positive, platinum-resistant ovarian cancer. Based on this experience, 
we opened an expansion cohort to prospectively evaluate mirvetuximab soravtansine, dosed at 6 mg/kg once every 3 
weeks, specifically for the treatment of patients diagnosed with FR(cid:302)-positive, platinum-resistant ovarian cancer. 

To qualify for enrollment, patients needed to have platinum-resistant ovarian cancer treated with up to 5 prior 

treatment regimens. They also needed to have at least low FR(cid:302) expression on their tumor cells, defined as: 

FR(cid:302) expression category 
High . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Medium  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Low  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Very low  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  

Percent of tumor cells with moderate (2+)
or high (3+) FR(cid:302) expression
at least 75% 
50% to 74% 
25% to 49% 
Less than 25% 

    Percent of  patients with ovarian cancer* 
40% 
20% 
20% 
20% 

*ImmunoGen estimate based on the pre-screening patients for FR(cid:302) expression for mirvetuximab soravtansine ovarian 
cancer trials and on published data. 

Findings in patients with FR(cid:302)-positive platinum-resistant ovarian cancer 

The data from this 46-patient cohort were presented at the ASCO annual meeting in June 2016. All of the 

patients enrolled had previously been treated with a platinum agent and with a taxane therapy; approximately two-thirds 
of the patients had received prior Avastin. Among the 46 patients, 23 had high, 14 had medium and 9 patients had low 

5 

     
    
    
 
 
    
 
 
 
 
 
expression of FR(cid:302) on their ovarian cancer. Half of the 46 patients had received 1, 2, or 3 prior regimens and half had 
received 4 or 5 prior regimens.  

The findings reported at ASCO include that, for the full 46-patient cohort, mirvetuximab soravtansine 
demonstrated favorable single-agent activity, with a confirmed (RECIST 1.1) objective response rate, or ORR, of 26% 
and a median PFS of 4.8 months (95% confidence interval, 3.9 to 5.7 months). The greatest activity was seen among the 
patients who had high or medium expression of the target and had received up to 3 prior regimens. 

Patients 
All in study (n=46)  . . . . . . . . . . . . . . . . . .   
Those with high or medium FR(cid:302) who 

received up to 3 prior regimens (n=16).   
Those with low FR(cid:302) who received 4 or 5 

prior regimens (n=30)  . . . . . . . . . . . . . .   

Standard single-agent therapies based on 

product label and other published data .   

ORR 
Confirmed responses only 
26% 

Median PFS 

4.8 months (95% CI, 3.9-5.7) 

44% 

17% 

    6.7 months (95% CI, 3.9-11.0 

4.2 months (95% CI, 2.6-5.5) 

15%-20% 

    3.5 to 4 months  

Mirvetuximab soravtansine was generally well tolerated. Incidence and severity of blurred vision was reduced 
from 55%, mostly Grade 2 in the first 20 patients enrolled, to 39%, mostly Grade 1 (least severe), among the 26 patients 
enrolled after methods such as use of lubricating eye drops were introduced to manage this side effect. Other side effects 
reported in more than 20% of patients were diarrhea, fatigue, nausea, vomiting, peripheral neuropathy, increased AST, 
keratopathy and abdominal pain. 

Based on the single-agent activity seen with mirvetuximab soravtansine in difficult-to-treat platinum-resistant 
ovarian cancer, its safety and tolerability in the more than 160 patients treated to date, and our meeting with the FDA in 
July 2016, we are advancing this ADC into Phase 3  registration-enabling testing while also assessing it in combination 
regimens to potentially provide greater benefit to more patients. 

FORWARD I – single-agent therapy for platinum-resistant disease 

Our FORWARD I Phase 3 trial will assess mirvetuximab soravtansine as single-agent therapy for patients with 
platinum-resistant ovarian cancer who previously received up to three treatment regimens. To be eligible for enrollment, 
a patient’s ovarian cancer also must have high or medium FR(cid:302) expression using an in vitro diagnostic test developed by 
Ventana Medical Systems, Inc. that is advancing in conjunction with this trial. We estimate that 5,000 to 7,000 patients 
per year in the U.S. meet these criteria, with a comparable number in Europe. 

The Phase 3 trial design includes: (i) randomization of 333 patients 2:1 to mirvetuximab soravtansine or 

physician’s choice, chosen among PLD, topotecan, and weekly paclitaxel; (ii) PFS as the primary endpoint of the trial; 
(iii) powering the trial to enable separate assessment of the primary endpoint in the full study population and in the 
subset with high FR(cid:302) expression; and (iv) inclusion of an interim analysis for futility. 

Having met with the FDA to review the trial design, we expect to begin this Phase 3 trial in the fourth quarter of 2016. 
We currently anticipate having data from FORWARD I in 2019. 

FORWARD II – combination therapy for expanded patient population 

Cancer is often treated with combination regimens to enhance the treatment effect over single agents and to 

expand the eligible patient populations. Our FORWARD II Phase 1b/2 trial assesses mirvetuximab soravtansine in 
separate combinations with each of PLD, Avastin, and carboplatin, and is expected to begin evaluation with Merck’s 
Keytruda in the second half of 2016. To qualify for enrollment in FORWARD II, patients must have at least low FR(cid:302) 
expression on their tumor cells. Patients with platinum-sensitive disease will be eligible for treatment with a combination 
of mirvetuximab soravtansine and carboplatin. 

We expect to begin reporting clinical findings from FORWARD II in the second quarter of 2017. 

6 

 
 
     
     
 
 
 
 
 
 
 
 
 
 
 
 
Commercialization 

We presently intend to market mirvetuximab soravtansine ourselves in the U.S. and in Europe and to partner it 
in other geographies. Expanding into earlier lines of treatment through use in combination regimens could significantly 
expand the opportunity. 

IMGN779 and IMGN632 – first-in-class ADCs for AML 

Our CD33-targeting IMGN779 product candidate for AML is the first ADC to use one of our new IGN payload 

agents that alkylate DNA without cross-linking it. 

In preclinical studies, ImmunoGen scientists found improvements in therapeutic index, the difference between 

efficacious doses and dose-limiting toxicity, between our DNA-alkylating IGN payloads and matched DNA cross-
linking agents, including the avoidance of prolonged toxicity. 

We advanced IMGN779 into Phase 1 clinical testing for AML in April 2016 and expect to report the first 

clinical data with the agent in 2017. The IMGN779 Phase 1 trial will assess two schedules (weekly and biweekly 
administration) in the dose-finding stage and then utilize the selected dose and schedule in the planned expansion 
cohorts: (i) assessment in patients with AML in first relapse, and (ii) assessment in patients with relapsed/refractory 
AML. 

The first disclosure of IMGN632, our CD123-targeting ADC, was at the European Hematology Meeting in June 

2016. This potential new therapy for AML and certain other hematologic malignancies utilizes a new ImmunoGen IGN 
payload and engineered linker as well as a novel antibody. It is in IND-enabling preclinical testing. 

IMGN529 and coltuximab ravtansine – novel ADCs for B-cell malignancies 

Our CD37-targeting ADC, IMGN529, has demonstrated single-agent activity in relapsed/refractory DLBCL in 
Phase 1 testing and striking synergy with rituximab in preclinical testing. IMGN529 is now in Phase 2 clinical testing in 
combination with rituximab. This novel ADC has orphan drug status for DLBCL in the U.S. 

Our CD19-targeting ADC, coltuximab ravtansine, has demonstrated single-agent, proof-of-concept activity in 

Phase 2 clinical testing. We believe this product candidate is best advanced in a combination regimen. 

Incidence of Relevant Cancers 

Cancer remains a leading cause of death worldwide, and is the second leading cause of death in the U.S. The 

American Cancer Society, or ACS, estimates that in 2016 approximately 1,685,210 new cases of cancer will be 
diagnosed in the U.S. and that approximately 600,000 people will die from the disease. The total number of people living 
with cancer significantly exceeds the number of patients diagnosed with cancer in a given year as patients can live with 
cancer for a year or longer. Additionally, the potential market for anticancer drugs exceeds the number of patients treated 
as many types of cancer typically are treated with multiple compounds at the same time and because patients often 
receive a number of drug regimens sequentially. 

Below is information about incidence of cancers we are seeking to treat with our wholly-owned compounds. In 

our clinical testing, we will define treatment subgroups of patients for the cancer types referenced. 

•  Mirvetuximab soravtansine. Our mirvetuximab soravtansine compound is a potential treatment for ovarian cancer 
and  potentially  other  cancers  that  highly  express  its  target,  FR(cid:302).  Based  on  published  sources,  we  believe 
approximately 23,000 new cases of ovarian cancer will be diagnosed in the U.S. in 2016. 

• 

IMGN779 and IMGN632. Our IMGN779 and IMGN632 compounds are each a potential treatment for AML. 
Based on ACS estimates, we believe approximately 20,000 new cases of AML will be diagnosed in the U.S. in 
2016. 

7 

 
 
 
 
 
 
 
 
 
 
 
 
• 

IMGN529 and coltuximab ravtansine. Our IMGN529 compound and our coltuximab ravtansine compound are 
potential treatments for a type of non-Hodgkin lymphoma, or NHL, called DLBCL. Based on ACS estimates, we 
believe approximately 73,000 new cases of NHL will be diagnosed in the U.S. in 2016. 

Out-licenses and Collaborations 

We selectively license restricted access to our ADC technology to other companies to expand the utilization of 
our technology and to provide us with cash to fund our own product programs. These agreements typically provide the 
licensee with rights to use our ADC technology with its antibodies or related targeting vehicles to a defined target to 
develop products. The licensee is generally responsible for the development, clinical testing, manufacturing, registration 
and commercialization of any resulting product candidate. As part of these agreements, we are generally entitled to 
receive upfront fees, potential milestone payments, royalties on the sales of any resulting products and research and 
development funding based on activities performed at our collaborative partner’s request. We are also compensated for 
preclinical and clinical materials that we supply to our partners. 

We only receive royalty payments from our out-licenses after a product candidate developed under the license 
has been approved for marketing and commercialized. Additionally, the largest milestone payments under our existing 
collaborations usually are on later-stage events, such as commencement of pivotal clinical trials, product approval and 
achievement of defined annual sales levels. Achievement of product approval requires, at a minimum, favorable 
completion of preclinical development and evaluation, assessment of early-stage clinical trials, advancement into pivotal 
Phase II and/or Phase III clinical testing, completion of this later-stage clinical testing with favorable results, and 
completion of regulatory submissions and a positive regulatory decision. Below is a table setting forth our active 
partnerships and current status of the most advanced program in the partnership: 

Partner 

Licensed targets 

Roche   . . . . . . . . . . . . .    HER2, 4 other* 
Bayer  . . . . . . . . . . . . . .    Mesothelin 
Sanofi . . . . . . . . . . . . . .   
Biotest  . . . . . . . . . . . . .   
Novartis . . . . . . . . . . . .   
Lilly  . . . . . . . . . . . . . . .   
Amgen . . . . . . . . . . . . .   
CytomX . . . . . . . . . . . .   
Takeda . . . . . . . . . . . . .    GCC 

CD38, CA6, CEACAM5, LAMP1, 1 other * 
CD138 
pCadherin, 5 other* 
FGFR3, 2 other* 
2*† 
CD166 

Status of Most Advanced Program 

  Marketed 
  Phase 2 designed to support registration 
  Phase 2 
  Phase 2 
  Phase 1 
  Phase 1 
  Phase 1 
  Research/Preclinical 
  Research/Preclinical 

*Undisclosed 
† Amgen has sublicensed one of its exclusive single-target licenses to Oxford BioTherapeutics Ltd. 

Roche 

In 2000, we granted Genentech, now a unit of Roche, an exclusive license to develop and commercialize 

HER2-targeting ADCs with our maytansinoid technology. Roche’s Kadcyla resulted from this license. Kadcyla was 
approved for marketing in the U.S., EU and Japan in 2013 based on the findings in the EMILIA Phase 3 trial. We 
received a $2 million upfront payment from Roche upon execution of the agreement. We are entitled to receive up to a 
total of $44 million in milestone payments, of which we have received $34 million to date, and also tiered royalties on 
the commercial sales of Kadcyla or any other resulting products as described below.  

In 2015, Immunity Royalty Holdings, L.P., or IRH, paid us $200 million to purchase our right to receive 100% 

of the royalty payments on commercial sales of Kadcyla arising under our development and commercialization license 
with Genentech, until IRH has received aggregate Kadcyla royalties equal to $235 million or $260 million, depending on 
when the aggregate Kadcyla royalties received by IRH reach a specified milestone. Once the applicable threshold is met, 
if ever, we will thereafter receive 85% and IRH will receive 15% of the Kadcyla royalties for the remaining royalty term.  

The royalty term is determined on a country-by-country basis, and is initially 10 years from the date of first 

commercial sale of Kadcyla in the country. If, on such 10th anniversary, Kadcyla is covered by a valid claim under any 
patents controlled by us (excluding patents jointly owned by us and Genentech), then royalties remain payable on sales 
of Kadcyla in that country for an additional 2 years. 

8 

 
 
 
 
 
 
 
The royalty rate is based on the calendar-year sales of Kadcyla in two territories: (1) the U.S. and (2) the rest of 
the world. For each territory, the rate is: 3% of net sales up to $250 million; 3.5% of net sales above $250 million and up 
to $400 million; 4% of net sales above $400 million and up to $700 million; and 5% of net sales above $700 million in 
the that territory during the calendar year. Royalties will be reduced to a flat 2% of net sales in any country at any time 
during the royalty term in which Kadcyla is not covered by a valid claim under any patents controlled by us (excluding 
patents jointly owned by us and Genentech or solely owned by Genentech) in such country.  

The license agreement also provides for certain adjustments to the royalties payable to us if Genentech makes 

certain third party license payments in order to exploit the ADC technology components of Kadcyla, although such 
adjustments would in no event reduce the royalties payable for any country below the greater of 50% of the royalties 
otherwise payable with respect to sales of Kadcyla in such country, or 2% of net sales in such country. As of the date of 
this annual report on Form 10-K, we are unaware of any facts or circumstances that are reasonably likely to give rise to 
such an adjustment. 

Roche may terminate this agreement for convenience at any time upon 90 days’ prior written notice to us. The 

agreement may also be terminated by either party for a material breach by the other, subject to notice and cure 
provisions. Unless earlier terminated, the agreement will continue in effect until the expiration of Roche’s royalty 
obligations. 

In fiscal year 2014, we received two $5 million milestone payments in connection with marketing approval of 

Kadcyla in Japan and in the EU.  

Roche, through its Genentech unit, also has licenses for the exclusive right to use our maytansinoid ADC 

technology with antibodies to four undisclosed targets, which were granted under the terms of a separate, now expired 
2000 right- to-test agreement with Genentech. For each of these licenses, we received a $1 million license fee and are 
entitled to receive up to a total of $38 million in milestone payments and also royalties on the sales of any resulting 
products. We have not received any milestone payments from these agreements through June 30, 2016. Roche is 
responsible for the development, manufacturing, and marketing of any products resulting from these licenses.  

Bayer  

In 2008, we granted Bayer an exclusive development and commercialization license to use our maytansinoid 

ADC technology with antibodies or other proteins that target mesothelin. We received a $4 million upfront payment 
upon execution of the agreement. We are also entitled to receive, for each product developed and marketed by Bayer 
under this agreement, up to a total of $170.5 million in milestone payments, plus tiered royalties between 4 - 7% on the 
commercial sales of any resulting products. 

Bayer has developed anetumab ravtansine under this agreement, and in 2016 initiated a Phase 2 trial designed 

to support marketing registration for which we received a $10 million milestone payment.   

Bayer may terminate the agreement for convenience at any time upon prior written notice to us. The agreement 
may also be terminated by either party for a material breach by the other, subject to notice and cure provisions. We may 
also terminate the agreement upon the occurrence of specified events. Unless earlier terminated, the agreement will 
continue in effect until the expiration of Bayer royalty obligations, which are determined on a product-by-product and 
country-by-country basis. For each product and country, Bayer royalty obligations commence upon first commercial sale 
of that product in that country, and extend until the later of either the expiration of the last-to-expire ImmunoGen patent 
covering that product in that country or the expiration for that country of the minimum royalty period specified in the 
agreement. 

Sanofi 

Collaboration Agreement 

In 2003, we entered into a broad collaboration agreement with Sanofi (formerly Aventis) to discover, develop 

and commercialize antibody based products. The collaboration agreement provided Sanofi with worldwide development 
and commercialization rights to new antibody based products directed to targets that were included in the collaboration, 
including the exclusive right to use our maytansinoid ADC technology in the creation of products developed to these 

9 

targets. No further targets may be added to this agreement and the product candidates (targets) as of June 30, 2016 in the 
collaboration include isatuximab (CD38), SAR566658 (CA6), SAR408701 (CEACAM5) and one earlier-stage program 
that has yet to be disclosed.  

The agreement may be terminated by either party for a material breach by the other, subject to notice and cure 

provisions. Unless earlier terminated, the agreement will continue in effect until the expiration of Sanofi’s royalty 
obligations, which are determined on a product-by-product and country-by-country basis. For each product and country, 
Sanofi’s royalty obligations commence upon first commercial sale of that product in that country, and extend until the 
later of either the expiration of the last-to- expire ImmunoGen patent covering that product in that country or the 
expiration for that country of the minimum royalty period specified in the agreement. 

The collaboration agreement also provides us an option to certain co-promotion rights in the U.S. on a 
product-by-product basis. The terms of the collaboration agreement allow Sanofi to terminate our co-promotion rights if 
there is a change in control of ImmunoGen. 

We are entitled to receive milestone payments potentially totaling $21.5 million, per target, plus royalties on the 

commercial sales of any resulting products. The total milestones are categorized as follows: development milestones—
$7.5 million; and regulatory milestones—$14 million. Through June 30, 2016, we have received and recognized an 
aggregate of $20.5 million in milestone payments for compounds covered under this agreement now or in the past.  

Right-to-Test Agreement  

Under a separate, now expired right-to-test agreement, in 2013, Sanofi took one exclusive development and 

commercialization license. Under this license, we received an exercise fee of $2 million and are further entitled to 
receive up to a total of $30 million in milestone payments, plus royalties on the commercial sales of any resulting 
products. The total milestones for each license are categorized as follows: development milestones—$10 million; and 
regulatory milestones—$20 million.  

Pursuant to the license agreement noted above, in 2015, Sanofi initiated Phase I, first-in-human clinical testing 

of its ADC product candidate, SAR428926 (LAMP1), triggering a $2 million development milestone payment to us 
which is included in license and milestone fee revenue for the year ended June 30, 2016.  

The SAR428926 development and commercialization license may be terminated by either party for a material 
breach by the other, subject to notice and cure provisions. Unless earlier terminated, the license will continue in effect 
until the expiration of Sanofi’s royalty obligations, which are determined on a product-by-product and 
country-by-country basis. For each product and country, Sanofi’s royalty obligations commence with the first 
commercial sale of that product in that country, and extend until the later of either the expiration of the last-to-expire 
ImmunoGen patent covering that product in that country or the expiration for that country of the minimum royalty 
period specified in the development and commercialization license. 

Biotest 

In 2006, we granted Biotest an exclusive development and commercialization license to our maytansinoid ADC 

technology for use with antibodies that target CD138. The product candidate indatuximab ravtansine is in development 
under this agreement. We received a $1 million upfront payment from Biotest upon execution of the agreement. We are 
also entitled to receive up to a total of $35.5 million in milestone payments, plus royalties on the commercial sales of any 
resulting products. Through June 30, 2016, we have received and recognized a total of $500,000 in milestone payments 
under this agreement.  

The agreement also provided us with the right to elect, at specific stages during the clinical evaluation of any 

compound created under the agreement, to participate in the U.S. development and commercialization of that compound 
in lieu of receiving the milestone payments not yet earned and royalties on sales in the U.S. Currently, we can exercise 
this right during an exercise period specified in the agreement by notice and payment to Biotest of an agreed upon opt-in 
fee of $15 million. Upon exercise of this right, we would share equally with Biotest the associated further costs of 
product development and commercialization in the U.S. along with the profit, if any, from product sales in the U.S. We 
would also be entitled to receive royalties, on a reduced basis, on product sales outside the U.S. 

10 

Biotest may terminate the agreement for convenience at any time prior to our election to participate in the U.S. 
development and commercialization of a compound created under this agreement upon prior notice to us. The agreement 
may also be terminated by either party for a material breach by the other, subject to notice and cure provisions. Unless 
earlier terminated, the agreement will continue in effect until the expiration of Biotest’s royalty obligations, which are 
determined on a product-by-product and country-by-country basis. For each product and country, Biotest’s royalty 
obligations commence upon first commercial sale of that product in that country, and extend until the later of either the 
expiration of the last-to-expire ImmunoGen patent covering that product in that country or the expiration for that country 
of the minimum royalty period specified in the agreement. 

Novartis 

Novartis took six exclusive development and commercialization licenses under a now-expired right-to-test 
agreement established in 2010. We received a $45 million upfront payment in connection with the execution of the 
right-to-test agreement in 2010, and for each development and commercialization license taken for a specific target, we 
received an exercise fee of $1 million and are entitled to receive up to a total of $199.5 million in milestone payments, 
plus royalties on the commercial sales of any resulting products. The initial three-year term of the right-to-test agreement 
was extended by Novartis in 2013 for an additional one-year period by payment of a $5 million fee to us. We also are 
entitled to receive payments for research and development activities performed on behalf of Novartis. Novartis is 
responsible for the manufacturing, product development and marketing of any products resulting from this agreement. 

In 2013, we and Novartis amended the right-to-test agreement so that Novartis could take a license to develop 

and commercialize products directed at two undisclosed, related targets, one target licensed on an exclusive basis and the 
other target initially licensed on a non-exclusive basis. The target licensed on a non-exclusive basis may no longer be 
converted to an exclusive target due to the expiration of the right-to-test agreement. We received a $3.5 million fee in 
connection with the execution of the amendment to the agreement. We may be required to credit this fee against future 
milestone payments if Novartis discontinues the development of a specified product under certain circumstances. 

In connection with the amendment, in 2013, Novartis took the license referenced above under the right-to-test 
agreement, as amended, enabling it to develop and commercialize products directed at the two targets. Additionally, the 
execution of this license provides us the opportunity to receive milestone payments totaling $199.5 million or 
$238 million, depending on the composition of any resulting products. Also, in 2013, Novartis took its second and third 
exclusive licenses to single targets, and in 2014, took three remaining exclusive licenses, each with the opportunity to 
receive milestone payments totaling $199.5 million, as outlined above, plus royalties on the commercial sales of any 
resulting products. In January 2015 and May 2015, Novartis initiated Phase I, first-in-human clinical testing of its cKit-
targeting ADC product candidate, LOP628, and P-cadherin-targeting ADC product candidate, PCA062, respectively, 
triggering a $5 million development milestone payment to us with each event.   

Novartis may terminate any development and commercialization license for convenience upon prior notice to 

us. Each license may also be terminated by either party for a material breach by the other, subject to notice and cure 
provisions. Unless earlier terminated, each development and commercialization license will continue in effect until the 
expiration of Novartis’ royalty obligations, which are determined on a product-by-product and country-by-country basis. 
For each product and country, Novartis’ royalty obligations commence upon first commercial sale of that product in that 
country, and extend until the later of either the expiration of the last-to-expire ImmunoGen patent covering that product 
in that country or the expiration for that country of the minimum royalty period specified in each license. 

Lilly 

Lilly took three exclusive development and commercialization licenses under a now expired right-to-test 
agreement established in 2011. We received a $20 million upfront payment in connection with the execution of the 
right-to-test agreement in 2011. Under the terms of this right-to-test agreement, the first license had no associated 
exercise fee, and the second and third licenses each had a $2 million exercise fee. The first development and 
commercialization license was taken in 2013 and the agreement was subsequently amended to provide Lilly with an 
extension provision and retrospectively include a $2 million exercise fee for the first license in lieu of the fee due for 
either the second or third license. The second and third licenses were taken in 2014, with one including the $2 million 
exercise fee and the other not. Under the two licenses with the $2 million exercise fee, we are entitled to receive up to a 
total of $199 million in milestone payments, plus royalties on the commercial sales of any resulting products. Under the 
license taken in 2014 without the exercise fee, we are entitled to receive up to a total of $200.5 million in milestone 
payments, plus royalties on the commercial sales of any resulting products. In September 2015, Lilly began Phase I 

11 

evaluation of one of its ADC product candidates, FGFR3-targeting LY3076226, triggering a $5 million milestone 
payment to us which is included in license and milestone fee revenue for the year ended June 30, 2016. We also are 
entitled to receive payments for delivery of cytotoxic agents to Lilly and research and development activities performed 
on behalf of Lilly. Lilly is responsible for the manufacturing, product development and marketing of any products 
resulting from this collaboration. 

Lilly may terminate any development and commercialization license for convenience upon prior notice to us. 

Each license may also be terminated by either party for a material breach by the other, subject to notice and cure 
provisions. We may also terminate the agreement upon the occurrence of specified events. Unless earlier terminated, 
each development and commercialization license will continue in effect until the expiration of Lilly’s royalty 
obligations, which are determined on a product-by-product and country-by-country basis. For each product and country, 
Lilly’s royalty obligations commence upon first commercial sale of that product in that country, and extend until the 
later of either the expiration of the last-to-expire ImmunoGen patent covering that product in that country or the 
expiration for that country of the minimum royalty period specified in each license. 

Amgen 

Amgen took three exclusive development and commercialization licenses under a now-expired right-to-test 
agreement established in 2000. In 2013, Amgen took one non-exclusive development and commercialization license. 
Later in 2013, the non-exclusive license was amended and converted to an exclusive license, which Amgen sublicensed 
to Oxford BioTherapeutics Ltd. In 2015, Amgen advised the Company that it had discontinued development of two 
product candidates, AMG 595 and AMG 172 that had been covered by two of Amgen’s four exclusive licenses, and in 
2016, Amgen terminated these two licenses. For each of the two remaining development and commercialization licenses 
taken, we are entitled to receive up to a total of $34 million in milestone payments, plus royalties on the commercial 
sales of any resulting products. The total milestones per license are categorized as follows: development milestones—
$9 million; regulatory milestones—$20 million; and sales milestones—$5 million. Amgen (or its sublicensee(s)) is 
responsible for the manufacturing, product development and marketing of any products resulting from these 
development and commercialization licenses. 

In 2015, Amgen’s IND application under the remaining license not sublicensed to Oxford BioTherapeutics 

became effective, triggering a $1 million milestone payment to us which is included in license and milestone fee revenue 
for the year ended June 30, 2016.  

Amgen may terminate each development and commercialization license for convenience upon prior notice to 

us. Each license may also be terminated by either party for a material breach by the other, subject to notice and cure 
provisions. Unless earlier terminated, each license will continue in effect until the expiration of Amgen’s royalty 
obligations, which are determined on a product-by-product and country-by-country basis. For each product and country, 
Amgen’s royalty obligations commence with the first commercial sale of that product in that country, and extend until 
the later of either the expiration of the last-to-expire ImmunoGen patent covering that product in that country or the 
expiration for that country of the minimum royalty period specified in each development and commercialization license. 

CytomX 

In 2014, we entered into a reciprocal right-to-test agreement with CytomX. The agreement provides CytomX 

with the right to test our payload agents and linkers with CytomX antibodies that utilize their proprietary antibody-
masking technology, termed ProbodiesTM  for a specified number of targets and to subsequently take an exclusive, 
worldwide license to use our technology to develop and commercialize Probody-drug conjugates directed to the 
specified targets on terms agreed upon at the inception of the right-to-test agreement. We received no upfront cash 
payment in connection with the execution of the right-to-test agreement. Instead, we received reciprocal rights to test our 
payload agents and linkers with ImmunoGen antibodies masked using CytomX technology to create Probody-drug 
conjugates directed to a specified number of targets and to subsequently take exclusive, worldwide licenses to develop 
and commercialize such conjugates directed to the specified targets on terms agreed upon at the inception of the 
right-to-test agreement. The terms of the right-to-test agreement require us and CytomX to each take its respective 
development and commercialization licenses by the end of the term of the research license. In addition, both we and 
CytomX are required to perform specific research activities under the right-to-test agreement on behalf of the other party 
for no monetary consideration. 

12 

In 2016, CytomX took its development and commercialization license for a specified target. An amendment of 

the agreement executed simultaneously with that license granted CytomX the right, for a specified period of time, to 
substitute the specified target with another as yet unspecified target. Accordingly, the revenue associated with this 
license is being deferred until the expiration of that substitution right. With respect to the development and 
commercialization license taken by CytomX, we are entitled to receive up to a total of $160 million in milestone 
payments plus royalties on the commercial sales of any resulting product.  

With respect to any development and commercialization license that may be taken by us, we will potentially be 
required to pay up to a total of $80 million in milestone payments per license, plus royalties on the commercial sales of 
any resulting product.  

In addition, each party may be liable to pay annual maintenance fees to the other party if the product candidate 

covered under a development and commercialization license has not progressed to a specified stage of development 
within a specified time frame. 

Takeda 

In 2015, we entered into a right-to-test agreement with Takeda Pharmaceutical Company Limited (Takeda) 

through its wholly owned subsidiary, Millennium Pharmaceuticals, Inc. The agreement provides Takeda with the right to 
(a) take exclusive options, with certain restrictions, to individual targets selected by Takeda for specified option periods, 
(b) test our maytansinoid and IGN ADC technology with Takeda’s antibodies directed to the targets optioned under a 
right-to-test, or research, license, and (c) take exclusive licenses to use our ADC technology to develop and 
commercialize products to targets optioned for up to two individual targets on terms specified in the right-to-test 
agreement. Takeda must exercise its options for the development and commercialization licenses by the end of the 
three-year term of the right-to-test agreement, after which any then outstanding options will lapse. Takeda has the right 
to extend the three-year right-to-test period for one additional year by payment to us of $4 million. Alternatively, Takeda 
has the right to expand the scope of the right-to-test agreement by payment to us of $8 million. If Takeda opts to expand 
the scope of the right-to-test agreement, it will be entitled to take additional exclusive options, one of which may be 
exercised for an additional development and commercialization license, and the right-to test period will be extended until 
the fifth anniversary of the effective date of the right-to-test agreement. Takeda is responsible for the manufacturing, 
product development and marketing of any products resulting from this collaboration. 

We received a $20 million upfront payment in connection with the execution of the right-to-test agreement and, 

for each development and commercialization license taken, are entitled to receive up to a total of $210 million in 
milestone payments, plus royalties on the commercial sales of any resulting products. The first exclusive license, for 
GCC, was taken by Takeda in December 2015, and as a result, we recognized $8.6 million of the $25.9 million of 
arrangement consideration allocated to the development and commercialization licenses, which is included in license and 
milestone fee revenue for the year ended June 30, 2016. We also are entitled to receive payments for delivery of 
cytotoxic agents to Takeda and research and development activities performed on behalf of Takeda. 

Takeda may terminate any development and commercialization license for convenience upon prior notice to us. 

Each license may also be terminated by either party for a material breach by the other, subject to notice and cure 
provisions. Unless earlier terminated, each development and commercialization license will continue in effect until the 
expiration of Takeda’s royalty obligations, which are determined on a product-by-product and country-by-country basis. 
For each product and country, Takeda’s royalty obligations commence upon first commercial sale of that product in that 
country, and extend until the later of either the expiration of the last-to-expire ImmunoGen patent covering that product 
in that country or the expiration for that country of the minimum royalty period specified in each license. 

Patents, Trademarks and Trade Secrets 

Our intellectual property strategy centers on obtaining patent protection for our proprietary technologies and 

product candidates. As of June 30, 2016, our patent portfolio had a total of 765 issued patents worldwide and 749 
pending patent applications worldwide. We seek to protect our ADC technology and our product candidates through a 
multi-pronged approach. In this regard, we have patents and patent applications covering antibodies and other 
cell-binding agents, linkers, cell-killing agents (e.g., tubulin-acting maytansinoids and DNA-acting cell-killing agents), 
and complete ADCs, comprising these components and methods of making and using each of the above. Typically, 
multiple issued patents and pending patent applications cover various aspects of each product candidate. 

13 

We consider our cell-killing agent technology to be a key component of our overall corporate strategy. We 

currently own 59 issued U.S. patents covering various embodiments of our maytansinoid technology including claims 
directed to certain maytansinoids, antibody-maytansinoid conjugates and other cell-binding agents used with 
maytansinoids, and methods of making and using the same. In all cases, we have received or are applying for 
comparable patents in other jurisdictions including Europe and Japan. We have issued patents that cover numerous 
aspects of the manufacture of both our DM1 and DM4 cell-killing agents. These issued patents remain in force until 
various times between 2020 and 2033. We also have several composition of matter patents covering various aspects of 
our DM4 cell-killing agent and antibody-maytansinoid conjugates incorporating DM4 that are expected to remain in 
force until 2024-2033. We have nine issued U.S. patents covering various aspects of our DNA-acting cell-killing agents, 
which will expire at various times between 2030 and 2035. We also have nine additional pending U.S. patent 
applications disclosing and claiming other related embodiments of this technology. Patents that may issue from these 
applications will, if issued, expire between 2030 and 2036. In all cases, we are also applying for comparable patents in 
other jurisdictions, including Europe and Japan. 

Our intellectual property strategy also includes pursuing patents directed to linkers, antibodies, conjugation 
methods, ADC formulations and the use of specific antibodies and ADCs to treat certain diseases. In this regard, we 
have issued patents and pending patent applications related to many of our linker technologies. These issued patents, 
expiring in 2021-2031, and any patents which may issue from the patent applications, cover antibody-maytansinoid 
conjugates using these linkers. We also have issued U.S. patents and pending patent applications covering methods of 
assembling ADCs from their constituent antibody, linker and cell-killing agent moieties. These issued patents will expire 
in 2021-2032, while any patents that may issue from pending patent applications also covering various aspects of these 
technologies will, if issued, expire between 2021 and 2037. We also have issued patents and pending patent applications 
related to monoclonal antibodies that may be a component of an ADC compound or may be developed as a therapeutic, 
or “naked,” antibody anticancer compound. 

We expect our continued work in each of these areas will lead to other patent applications. In all such cases, we 

will either be the assignee or owner of such patents or have an exclusive license to the technology covered by the 
patents. 

The rates at which we are entitled to receive royalties based on sales of Kadcyla in any particular country 
depend in part on whether the manufacture, use or sale of Kadcyla is covered by ImmunoGen patent rights in that 
country. In this regard, we own patents in the U.S. and Europe covering the composition of matter of Kadcyla that expire 
at the earliest in 2023 and 2024, respectively, and may be eligible for extension of those terms under applicable patent 
laws in those jurisdictions. We also own patents in the U.S. and Europe that cover various elements of the manufacture 
of Kadcyla, with expiration dates extending to at least 2027 and 2026, respectively. Notwithstanding these patent terms, 
the period during which we are entitled to receive royalties based on sales of Kadcyla in any country does not extend 
beyond the 12th anniversary of the date of the first commercial sale of Kadcyla in such country. 

We cannot provide assurance that the patent applications will issue as patents or that any patents, if issued, will 
provide us with adequate protection against competitors with respect to the covered products, technologies or processes. 
Defining the scope and term of patent protection involves complex legal and factual analyses and, at any given time, the 
result of such analyses may be uncertain. In addition, other parties may challenge our patents in litigation or 
administrative proceedings resulting in a partial or complete loss of certain patent rights owned or controlled by 
ImmunoGen, Inc. Furthermore, as a patent does not confer any specific freedom to operate, other parties may have 
patents that may block or otherwise hinder the development and commercialization of our technology. 

On October 29, 2014, the Patent Trial and Appeal Board of the U.S. Patent and Trademark Office, or PTAB, 
instituted an inter partes review, or IPR, of the claims in our U.S. Patent No. 8,337,856, or the ’856 Patent, that covers 
Kadcyla. The PTAB issued a Final Written Decision on the matter in which all claims of the ’856 were held to be not 
unpatentable. The Petitioner has appealed this decision to the Court of Appeals for the Federal Circuit, or CAFC. Briefs 
have been filed and we expect the CAFC to hear Oral Argument in the first quarter of 2017 and issue a final decision in 
second quarter of 2017. The ’856 Patent is one of several U.S. patents we hold that pertain to Kadcyla. Consequently, 
any adverse outcome of the Appeal is not expected to impact either the royalty revenue we are entitled to receive from 
Roche on Kadcyla sales in the U.S., or the $200 million royalty monetization transaction relating to our Kadcyla royalty 
stream that was consummated in 2015. 

Many of the processes and much of the know-how that are important to us depend upon the skills, knowledge 

and experience of our key scientific and technical personnel, which skills, knowledge and experience are not patentable. 

14 

To protect our rights in these areas, we require that all employees, consultants, advisors and collaborators enter into 
confidentiality agreements with us. Further, we require that all employees enter into assignment of invention agreements 
as a condition of employment. We cannot provide assurance, however, that these agreements will provide adequate or 
any meaningful protection for our trade secrets, know-how or other proprietary information in the event of any 
unauthorized use or disclosure of such trade secrets, know-how or proprietary information. Further, in the absence of 
patent protection, we may be exposed to competitors who independently develop substantially equivalent technology or 
otherwise gain access to our trade secrets, know-how or other proprietary information. 

Competition 

We focus on highly competitive areas of product development. Our competitors include major pharmaceutical 

companies and other biotechnology firms. For example, Pfizer, Seattle Genetics Roche, Takeda, AbbVie and 
Bristol-Myers Squibb have programs to attach a cell-killing small molecule to an antibody for targeted delivery to cancer 
cells. Pharmaceutical and biotechnology companies, as well as other institutions, also compete with us for promising 
targets for antibody-based therapeutics and in recruiting highly qualified scientific personnel. Additionally, there are 
non-ADC therapies available and/or in development for the cancer types we and our partners are targeting. Many 
competitors and potential competitors have substantially greater scientific, research and product development 
capabilities, as well as greater financial, marketing and human resources than we do. In addition, many specialized 
biotechnology firms have formed collaborations with large, established companies to support the research, development 
and commercialization of products that may be competitive with ours. 

In particular, competitive factors within the antibody and cancer therapeutic market include: 

• 

• 

• 

• 

the safety and efficacy of products; 

the timing of regulatory approval and commercial introduction; 

special regulatory designation of products, such as Orphan Drug designation; and 

the effectiveness of marketing, sales, and reimbursement efforts. 

Our competitive position depends on our ability to develop effective proprietary products, implement clinical 

development programs, production plans and marketing plans, including collaborations with other companies with 
greater marketing resources than ours, and to obtain patent protection and secure sufficient capital resources. 

Continuing development of conventional and targeted chemotherapeutics by large pharmaceutical companies 

and biotechnology companies may result in new compounds that may compete with our product candidates. Antibodies 
developed by certain of these companies have been approved for use as cancer therapeutics. In the future, new antibodies 
or other targeted therapies may compete with our product candidates. Other companies have created or have programs to 
create potent cell-killing agents for attachment to antibodies. These companies may compete with us for technology 
out-license arrangements. 

Regulatory Matters 

Government Regulation and Product Approval 

Government authorities in the U.S., at the federal, state and local level, and other countries extensively regulate, 

among other things, the research, development, testing, manufacture, quality control, approval, labeling, packaging, 
storage, record-keeping, promotion, advertising, distribution, marketing and export and import of products such as those 
we are developing. A new drug must be approved by the FDA through the new drug application, or NDA, process and a 
new biologic must be approved by the FDA through the biologics license application, or BLA, process before it may be 
legally marketed in the U.S. 

U.S. Drug Development Process 

In the U.S., the FDA regulates drugs under the federal Food, Drug, and Cosmetic Act, or FDCA, and in the case 
of biologics, also under the Public Health Service Act, or PHSA, and implementing regulations. The process of obtaining 
regulatory approvals and the subsequent compliance with appropriate federal, state, local, and foreign statutes and 
regulations require the expenditure of substantial time and financial resources. Failure to comply with the applicable 

15 

U.S. requirements at any time during the product development process, approval process or after approval, may subject 
an applicant to administrative or judicial sanctions. These sanctions could include the FDA’s refusal to approve pending 
applications, withdrawal of an approval, a clinical hold, warning letters, product recalls, product seizures, total or partial 
suspension of production or distribution, injunctions, fines, refusals of government contracts, restitution, disgorgement, 
or civil or criminal penalties. Any agency or judicial enforcement action could have a material adverse effect on us. The 
process required by the FDA before a drug or biologic may be marketed in the U.S. generally involves the following: 

• 

• 

• 

• 

• 

• 

completion of preclinical laboratory tests, animal studies and formulation studies according to current 
Good Laboratory Practices, or cGLP, or other applicable regulations; 

submission to the FDA of an IND which must become effective before human clinical trials may begin; 

performance of adequate and well-controlled human clinical trials according to current Good Clinical 
Practices, or cGCP, to establish the safety and efficacy of the proposed drug for its intended use; 

development and approval of a companion diagnostic device if the FDA or the sponsor believes that its use 
is essential for the safe and effective use of a corresponding product; 

submission to the FDA of an NDA or BLA; 

satisfactory completion of an FDA inspection of the manufacturing facility or facilities at which the drug is 
produced to assess compliance with current Good Manufacturing Practice, or cGMP, to assure that the 
facilities, methods and controls are adequate to preserve the drug’s identity, strength, quality and purity; 
and 

•  FDA review and approval of the NDA or BLA. 

Once a pharmaceutical candidate is identified for development, it enters the preclinical testing stage. Preclinical 

tests include laboratory evaluations of product chemistry, toxicity and formulation, as well as animal studies. An IND 
sponsor must submit the results of the preclinical tests, together with manufacturing information and analytical data, to 
the FDA as part of the IND. The sponsor will also include a protocol detailing, among other things, the objectives of the 
first phase of the clinical trial, the parameters to be used in monitoring safety, and the effectiveness criteria to be 
evaluated, if the first phase lends itself to an efficacy evaluation. Some preclinical testing may continue even after the 
IND is submitted. The IND automatically becomes effective 30 days after receipt by the FDA, unless the FDA, within 
the 30-day time period, places the clinical trial on a clinical hold. In such a case, the IND sponsor and the FDA must 
resolve any outstanding concerns before the clinical trial can begin. Clinical holds also may be imposed by the FDA at 
any time before or during clinical trials due to safety concerns about on-going or proposed clinical trials or 
non-compliance with specific FDA requirements, and the trials may not begin or continue until the FDA notifies the 
sponsor that the hold has been lifted. 

All clinical trials must be conducted under the supervision of one or more qualified investigators in accordance 
with cGCP regulations. They must be conducted under protocols detailing the objectives of the trial, dosing procedures, 
subject selection and exclusion criteria and the safety and effectiveness criteria to be evaluated. Each protocol must be 
submitted to the FDA as part of the IND, and timely safety reports must be submitted to the FDA and the investigators 
for serious and unexpected adverse events. An institutional review board, or IRB, at each institution participating in the 
clinical trial must review and approve each protocol before a clinical trial commences at that institution and must also 
approve the information regarding the trial and the consent form that must be provided to each trial subject or his or her 
legal representative, monitor the study until completed and otherwise comply with IRB regulations. 

Human clinical trials are typically conducted in three sequential phases that may overlap or be combined: 

•  Phase I:  The product candidate is initially introduced into healthy human subjects and tested for safety, 
dosage tolerance, absorption, metabolism, distribution and excretion. In the case of some products for 
severe or life-threatening diseases, such as cancer, especially when the product may be too inherently toxic 
to ethically administer to healthy volunteers, the initial human testing is often conducted in patients. 

16 

•  Phase II:  This phase involves clinical trials in a limited patient population to identify possible adverse 

effects and safety risks, to preliminarily evaluate the efficacy of the product for specific targeted diseases 
and to determine dosage tolerance and optimal dosage. 

•  Phase III:  Clinical trials are undertaken to further evaluate dosage, clinical efficacy and safety in an 
expanded patient population at geographically dispersed clinical study sites. These clinical trials are 
intended to establish the overall risk-benefit ratio of the product candidate and provide, if appropriate, an 
adequate basis for product labeling. 

Post-approval trials, sometimes referred to as Phase IV, may be conducted after initial marketing approval. 

These trials are used to gain additional experience from the treatment of patients in the intended therapeutic indication. 
In certain instances, the FDA may mandate the performance of Phase IV clinical trials as a condition of approval of an 
NDA or BLA. 

The FDA or the sponsor may suspend a clinical trial at any time on various grounds, including a finding that the 

research subjects or patients are being exposed to an unacceptable health risk. Similarly, an IRB can suspend or 
terminate approval of a clinical trial at its institution if the clinical trial is not being conducted in accordance with the 
IRB’s requirements or if the drug has been associated with unexpected serious harm to patients. Additionally, some 
clinical trials are overseen by an independent group of qualified experts organized by the sponsor, known as a data safety 
monitoring board or committee. Depending on its charter, this group may determine whether a trial may move forward at 
designated check points based on access to certain data from the trial. Phase I, Phase II, and Phase III testing may not be 
completed successfully within any specified period, if at all. 

During the development of a new drug, sponsors are given opportunities to meet with the FDA at certain points. 

These points may be prior to submission of an IND, at the end of Phase II, and before an NDA or BLA is submitted. 
Meetings at other times may be requested. These meetings can provide an opportunity for the sponsor to share 
information about the data gathered to date, for the FDA to provide advice, and for the sponsor and FDA to reach 
agreement on the next phase of development. Sponsors typically use the End of Phase II meeting to discuss their Phase II 
clinical results and present their plans for the pivotal Phase III clinical trial that they believe will support approval of the 
new drug. If this type of discussion occurs, a sponsor may be able to request a Special Protocol Assessment, or SPA, the 
purpose of which is to reach agreement with the FDA on the design of the Phase III clinical trial protocol design and 
analysis that will form the primary basis of an efficacy claim. 

According to FDA guidance for industry on the SPA process, a sponsor that meets the prerequisites may make a 
specific request for a special protocol assessment and provide information regarding the design and size of the proposed 
clinical trial. The FDA is required to evaluate the protocol within 45 days of the request to assess whether the proposed 
trial is adequate, and that evaluation may result in discussions and a request for additional information. A SPA request 
must be made before the proposed trial begins, and all open issues must be resolved before the trial begins. If a written 
agreement is reached, it will be documented and made part of the record. The agreement will be binding on the FDA and 
may not be changed by the sponsor or the FDA after the trial begins except with the written agreement of the sponsor 
and the FDA or if the FDA determines that a substantial scientific issue essential to determining the safety or efficacy of 
the drug was identified after the testing began. If the sponsor makes any unilateral changes to the approved protocol, the 
agreement will be invalidated. 

For some of our product candidates, including mirvetuximab soravtansine and potentially others, we plan to 

work with collaborators to develop or obtain access to in vitro companion diagnostic tests to identify appropriate patients 
for these targeted therapies. 

If a sponsor or the FDA believes that an in vitro companion diagnostic is essential for the safe and effective use 
of a corresponding therapeutic product, a sponsor will typically work with a sponsor of an in vitro companion diagnostic 
to develop the drug and the related diagnostic at the same time. In vitro diagnostic, or IVD, tests are regulated by the 
FDA as medical devices. The FDA issued a final guidance document in 2014, entitled “In Vitro Companion Diagnostic 
Devices” that is intended to assist companies developing a therapeutic product for which the use of an IVD test provides 
information that is essential for the safe and effective use of the corresponding therapeutic product and companies 
developing those IVD tests. Such tests, where the test results are essential rather than just helpful, were designated IVD 
companion diagnostic devices. It also issued a draft guidance on July 15, 2016, entitled, “Principles for Codevelopment 
of an In Vitro Companion Diagnostic Device with a Therapeutic Product” to serve as a practical guide to assist 

17 

therapeutic product sponsors and IVD sponsors in developing a therapeutic product and an accompanying IVD 
companion diagnostic. 

The FDA indicated that it will apply a risk-based approach to determine the regulatory pathway for IVD 

companion diagnostic devices, as it does with all medical devices. This means that the regulatory pathway will depend 
on the level of risk to patients, based on the intended use of the IVD companion diagnostic device and the controls 
necessary to provide a reasonable assurance of safety and effectiveness. The two primary types of marketing pathways 
for medical devices are clearance of a premarket notification under Section 510(k) of the Federal Food, Drug, and 
Cosmetic Act, or 510(k), and approval of a premarket approval application, or PMA. We expect that any IVD 
companion diagnostic device developed for use with our drug candidates will utilize the PMA pathway and that a 
clinical trial performed under an investigational device exemption, or IDE, will have to be completed before the PMA 
may be submitted. 

The FDA expects that the therapeutic sponsor will address the need for an IVD companion diagnostic device in 

its therapeutic product development plan and that, in most cases, the therapeutic product and its corresponding IVD 
companion diagnostic device will be developed contemporaneously. If the companion diagnostic test will be used to 
make critical treatment decisions such as patient selection, treatment assignment, or treatment arm, it will likely be 
considered a significant risk device for which a clinical trial will be required. 

The sponsor of the IVD companion diagnostic device will be required to comply with the FDA’s IDE 

requirements that apply to clinical trials of significant risk devices. If the diagnostic test and the therapeutic drug are 
studied together to support their respective approvals, the clinical trial must meet both the IDE and IND requirements. 

PMAs must be supported by valid scientific evidence, which typically requires extensive data, including 

technical, preclinical, clinical and manufacturing data, to demonstrate to the FDA’s satisfaction the safety and 
effectiveness of the device. For diagnostic tests, a PMA typically includes data regarding analytical and clinical 
validation studies. As part of its review of the PMA, the FDA will conduct a pre-approval inspection of the 
manufacturing facility or facilities to ensure compliance with the Quality System Regulation, or QSR, which requires 
manufacturers to follow design, testing, control, documentation and other quality assurance procedures. FDA review of 
an initial PMA may require several years to complete. 

If the FDA evaluations of both the PMA and the manufacturing facilities are favorable, the FDA will either 

issue an approval order or an approvable letter, which usually contains a number of conditions that must be met in order 
to secure the final approval of the PMA. If the FDA’s evaluation of the PMA or manufacturing facilities is not favorable, 
the FDA will send the applicant a not approvable letter or an order denying approval. A not approvable letter will outline 
the deficiencies in the application and, where practical, will identify what is necessary to make the PMA approvable. The 
FDA may also determine that additional clinical trials are necessary, in which case the PMA approval may be delayed 
for several months or years while the trials are conducted and then the data submitted in an amendment to the PMA. 
Once granted, PMA approval may be withdrawn by the FDA if compliance with post approval requirements, conditions 
of approval or other regulatory standards is not maintained or problems are identified following initial marketing. 

After approval, the use of an IVD companion diagnostic device with a therapeutic product will be stipulated in 

the instructions for use in the labeling of both the diagnostic device and the corresponding therapeutic product. In 
addition, a diagnostic test that was approved through the PMA process or one that was cleared through the 510(k) 
process and placed on the market will be subject to many of the same regulatory requirements that apply to approved 
drugs. 

Concurrent with clinical trials, companies usually complete additional animal studies and must also develop 

additional information about the chemistry and physical characteristics of the drug and finalize a process for 
manufacturing the product in commercial quantities in accordance with cGMP requirements. The manufacturing process 
must be capable of consistently producing quality batches of the product candidate and, among other things, the 
manufacturer must develop methods for testing the identity, strength, quality and purity of the final drug. Additionally, 
appropriate packaging must be selected and tested and stability studies must be conducted to demonstrate that the 
product candidate does not undergo unacceptable deterioration over its shelf life. 

While the IND is active and before approval, progress reports summarizing the results of the clinical trials and 
nonclinical studies performed since the last progress report must be submitted at least annually to the FDA, and written 
IND safety reports must be submitted to the FDA and investigators for serious and unexpected suspected adverse events, 

18 

findings from other studies suggesting a significant risk to humans exposed to the same or similar drugs, findings from 
animal or in vitro testing suggesting a significant risk to humans, and any clinically important increased incidence of a 
serious suspected adverse reaction compared to that listed in the protocol or investigator brochure. 

There are also requirements governing the reporting of ongoing clinical trials and completed trial results to 

public registries. Sponsors of certain clinical trials of FDA-regulated products are required to register and disclose 
specified clinical trial information, which is publicly available at www.clinicaltrials.gov. Information related to the 
product, patient population, phase of investigation, trial sites and investigators and other aspects of the clinical trial is 
then made public as part of the registration. Sponsors are also obligated to discuss the results of their clinical trials after 
completion. Disclosure of the results of these trials can be delayed until the new product or new indication being studied 
has been approved. However, there are evolving rules and increasing requirements for publication of all trial-related 
information, and it is possible that data and other information from trials involving drugs that never garner approval 
could require disclosure in the future. 

U.S. Review and Approval Processes 

The results of product development, preclinical and other non-clinical studies and clinical trials, along with 
descriptions of the manufacturing process, analytical tests conducted on the chemistry of the drug, proposed labeling, 
and other relevant information are submitted to the FDA as part of an NDA or BLA requesting approval to market the 
product. The submission of an NDA or BLA is subject to the payment of user fees; a waiver of such fees may be 
obtained under certain limited circumstances. The FDA reviews all NDAs and BLAs submitted to ensure that they are 
sufficiently complete for substantive review before it accepts them for filing. The FDA may request additional 
information rather than accept an NDA or BLA for filing. In this event, the NDA or BLA must be resubmitted with the 
additional information. The resubmitted application also is subject to review before the FDA accepts it for filing. Once 
the submission is accepted for filing, the FDA begins an in-depth substantive review. FDA may refer the NDA or BLA 
to an advisory committee for review, evaluation and recommendation as to whether the application should be approved 
and under what conditions. The FDA is not bound by the recommendation of an advisory committee, but it generally 
follows such recommendations. The approval process is lengthy and often difficult, and the FDA may refuse to approve 
an NDA or BLA if the applicable regulatory criteria are not satisfied or may require additional clinical or other data and 
information. Even if such data and information is submitted, the FDA may ultimately decide that the NDA or BLA does 
not satisfy the criteria for approval. Data obtained from clinical trials are not always conclusive and the FDA may 
interpret data differently than we interpret the same data. The FDA may issue a complete response letter, which may 
require additional clinical or other data or impose other conditions that must be met in order to secure final approval of 
the NDA or BLA, or an approved letter following satisfactory completion of all aspects of the review process. The FDA 
reviews an NDA to determine, among other things, whether a product is safe and effective for its intended use and 
whether its manufacturing is cGMP-compliant to assure and preserve the product’s identity, strength, quality and purity. 
The FDA reviews a BLA to determine, among other things whether the product is safe, pure and potent and the facility 
in which it is manufactured, processed, packed or held meets standards designed to assure the product’s continued 
safety, purity and potency. Before approving an NDA or BLA, the FDA will inspect the facility or facilities where the 
product is manufactured. 

NDAs or BLAs receive either standard or priority review. A drug representing a significant improvement in 

treatment, prevention or diagnosis of disease may receive priority review. Priority review for an NDA for a new 
molecular entity and original BLAs will be 6 months from the date that the NDA or BLA is filed. In addition, products 
studied for their safety and effectiveness in treating serious or life-threatening illnesses and that provide meaningful 
therapeutic benefit over existing treatments may receive accelerated approval and may be approved on the basis of 
adequate and well-controlled clinical trials establishing that the drug product has an effect on a surrogate endpoint that is 
reasonably likely to predict clinical benefit or on the basis of an effect on a clinical endpoint other than survival or 
irreversible morbidity. As a condition of approval, the FDA may require that a sponsor of a drug receiving accelerated 
approval perform adequate and well-controlled Phase IV clinical trials. Priority review and accelerated approval do not 
change the standards for approval, but may expedite the approval process. 

After the FDA evaluates an NDA or BLA, it will issue an approval letter or a Complete Response Letter. An 

approval letter authorizes commercial marketing of the drug with prescribing information for specific indications. A 
Complete Response Letter indicates that the review cycle of the application is complete and the application will not be 
approved in its present form. A Complete Response Letter usually describes the specific deficiencies in the NDA or 
BLA identified by the FDA and may require additional clinical data, such as an additional pivotal Phase III trial or other 
significant and time-consuming requirements related to clinical trials, nonclinical studies or manufacturing. If a 

19 

Complete Response Letter is issued, the sponsor must resubmit the NDA or BLA, addressing all of the deficiencies 
identified in the letter, or withdraw the application. Even if such data and information are submitted, the FDA may 
decide that the NDA or BLA does not satisfy the criteria for approval. 

If a product receives regulatory approval, the approval may be significantly limited to specific diseases and 

dosages or the indications for use may otherwise be limited, which could restrict the commercial value of the product. In 
addition, the FDA may require a sponsor to conduct Phase IV testing which involves clinical trials designed to further 
assess a drug’s safety and effectiveness after NDA or BLA approval, and may require testing and surveillance programs 
to monitor the safety of approved products which have been commercialized. The FDA may also place other conditions 
on approval including the requirement for a risk evaluation and mitigation strategy, or REMS, to assure the safe use of 
the drug. If the FDA concludes a REMS is needed, the sponsor of the NDA or BLA must submit a proposed REMS. The 
FDA will not approve the NDA or BLA without an approved REMS, if required. A REMS could include medication 
guides, physician communication plans or elements to assure safe use, such as restricted distribution methods, patient 
registries and other risk minimization tools. Any of these limitations on approval or marketing could restrict the 
commercial promotion, distribution, prescription or dispensing of products. Marketing approval may be withdrawn for 
non-compliance with regulatory requirements or if problems occur following initial marketing. 

The Pediatric Research Equity Act, or PREA, requires a sponsor to conduct pediatric clinical trials for most 

drugs and biologics, for a new active ingredient, new indication, new dosage form, new dosing regimen or new route of 
administration. Under PREA, original NDAs, BLAs and supplements thereto, must contain a pediatric assessment unless 
the sponsor has received a deferral or waiver. The required assessment must evaluate the safety and effectiveness of the 
product for the claimed indications in all relevant pediatric subpopulations and support dosing and administration for 
each pediatric subpopulation for which the product is safe and effective. The sponsor or FDA may request a deferral of 
pediatric clinical trials for some or all of the pediatric subpopulations. A deferral may be granted for several reasons, 
including a finding that the drug or biologic is ready for approval for use in adults before pediatric clinical trials are 
complete or that additional safety or effectiveness data needs to be collected before the pediatric clinical trials begin. 
Orphan indications are exempt from PREA. The FDA must send a non-compliance letter to any sponsor that fails to 
submit the required assessment, keep a deferral current or fails to submit a request for approval of a pediatric 
formulation. 

Patent Term Restoration and Marketing Exclusivity 

Depending upon the timing, duration and specifics of FDA approval of our drugs, some of our U.S. patents may 
be eligible for limited patent term extension under the Drug Price Competition and Patent Term Restoration Act of 1984, 
referred to as the Hatch-Waxman Amendments. The Hatch-Waxman Amendments permit a patent restoration term of up 
to five years as compensation for patent term lost during product development and the FDA regulatory review process. 
However, patent term restoration cannot extend the remaining term of a patent beyond a total of 14 years from the 
product’s approval date. The patent term restoration period is generally one-half the time between the effective date of 
an IND, and the submission date of an NDA or BLA, plus the time between the submission date of an NDA or BLA and 
the approval of that application. Only one patent applicable to an approved drug is eligible for the extension, and the 
extension must be applied for prior to expiration of the patent. The U.S. Patent and Trademark Office, in consultation 
with the FDA, reviews and approves the application for any patent term extension or restoration. In the future, we intend 
to apply for restorations of patent term for some of our currently owned or licensed patents to add patent life beyond 
their current expiration date, depending on the expected length of clinical trials and other factors involved in the filing of 
the relevant NDA. 

Pediatric exclusivity is a type of marketing exclusivity available in the U.S. Under the Best Pharmaceuticals for 

Children Act, or BPCA, an additional six months of marketing exclusivity may be available if a sponsor conducts 
clinical trials in children in response to a written request from the FDA, or a Written Request. If the Written Request 
does not include clinical trials in neonates, the FDA is required to include its rationale for not requesting those clinical 
trials. The FDA may request studies on approved or unapproved indications in separate Written Requests. The issuance 
of a Written Request does not require the sponsor to undertake the described clinical trials. To date, we have not 
received any Written Requests. 

Biologics Price Competition and Innovation Act of 2009 

The Patient Protection and Affordable Care Act which included the Biologics Price Competition and Innovation 

Act of 2009, or BPCIA, amended the PHSA to create an abbreviated approval pathway for two types of “generic” 

20 

biologics—biosimilars and interchangeable biologic products, and provides for a twelve-year data exclusivity period for 
the first approved biological product, or reference product, against which a biosimilar or interchangeable application is 
evaluated; however if pediatric clinical trials are performed and accepted by the FDA, the twelve-year data exclusivity 
period will be extended for an additional six months. A biosimilar product is defined as one that is highly similar to a 
reference product notwithstanding minor differences in clinically inactive components and for which there are no 
clinically meaningful differences between the biological product and the reference product in terms of the safety, purity 
and potency of the product. An interchangeable product is a biosimilar product that may be substituted for the reference 
product without the intervention of the health care provider who prescribed the reference product. 

The biosimilar applicant must demonstrate that the product is biosimilar based on data from (1) analytical 
studies showing that the biosimilar product is highly similar to the reference product; (2) animal studies (including 
toxicity); and (3) one or more clinical trials to demonstrate safety, purity and potency in one or more appropriate 
conditions of use for which the reference product is approved. In addition, the applicant must show that the biosimilar 
and reference products have the same mechanism of action for the conditions of use on the label, route of administration, 
dosage and strength, and the production facility must meet standards designed to assure product safety, purity and 
potency. 

An application for a biosimilar product may not be submitted until four years after the date on which the 
reference product was first approved. The first approved interchangeable biologic product will be granted an exclusivity 
period of up to one year after it is first commercially marketed, but the exclusivity period may be shortened under certain 
circumstances. 

The FDA has issued a number of final and draft guidances in order to implement the law. On April 28, 2015, 

the FDA issued the following four final guidances: “Scientific Considerations in Demonstrating Biosimilarity to a 
Reference Product,” “Quality Considerations in Demonstrating Biosimilarity of a Therapeutic Protein Product to a 
Reference Product,” and “Biosimilars: Questions and Answers Regarding Implementation of the Biologics Price 
Competition and Innovation Act of 2009 Guidance for Industry,” and “Formal Meetings between the FDA and 
Biosimilar Biological Product Sponsors or Applicants” issued November 17, 2015. The draft guidances include: 
“Clinical Pharmacology Data to Support a Demonstration of Biosimilarity to a Reference Product” issued May 13, 2014, 
“Reference Product Exclusivity for Biological Products Filed Under Section 351(a) of the PHS Act” issued August 4, 
2014, and “Biosimilars: Additional Questions and Answers Regarding Implementation of the Price Competition and 
Innovation Act of 2009,” issued May 12, 2015. 

The guidance documents provide FDA’s current thinking on approaches to demonstrating that a proposed 

biological product is biosimilar to a reference product. The FDA intends to issue additional guidance documents in the 
future, and has identified considerations in demonstrating interchangeability to a reference product, labeling and 
nonproprietary naming as several of the issues that it hopes to address in calendar year 2015. Nonetheless, the absence of 
final guidance documents covering all biosimilars issues does not prevent a sponsor from seeking licensure of a 
biosimilar under the BPCIA, and the FDA recently approved two biosimilar applications in the U.S. 

Orphan Drug Designation 

Under the Orphan Drug Act, the FDA may grant orphan drug designation to a drug intended to treat a rare 

disease or condition, which is generally a disease or condition that affects fewer than 200,000 individuals in the U.S., or 
more than 200,000 individuals in the U.S. and for which there is no reasonable expectation that the cost of developing 
and making available in the U.S. a drug for this type of disease or condition will be recovered from sales in the U.S. for 
that drug. Orphan drug designation must be requested before submitting an NDA or BLA. After the FDA grants orphan 
drug designation, the identity of the therapeutic agent and its potential orphan use will be disclosed publicly by the FDA; 
the posting will also indicate whether a drug is no longer designated as an orphan drug. More than one product candidate 
may receive an orphan drug designation for the same indication. Orphan drug designation does not convey any 
advantage in or shorten the duration of the regulatory review and approval process. 

If a product that has orphan drug designation subsequently receives the first FDA approval for the disease for 

which it has such designation, the product is entitled to seven years of orphan product exclusivity, except in very limited 
circumstances. The FDA issued a final rule, effective August 12, 2013, intended to clarify several regulatory provisions, 
among which was a clarification of some of those limited circumstances. One of the provisions makes clear that the FDA 
will not recognize orphan drug exclusive approval if a sponsor fails to demonstrate upon approval that the drug is 
clinically superior to a previously approved drug, regardless of whether or not the approved drug was designated an 

21 

orphan drug or had orphan drug exclusivity. Thus orphan drug exclusivity also could block the approval of one of our 
products for seven years if a competitor obtains approval of the same drug as defined by the FDA and we are not able to 
show the clinical superiority of our drug or if our product candidate is determined to be contained within the 
competitor’s product for the same indication or disease. 

The FDA and the European Union granted Orphan Drug designation to mirvetuximab soravtansine, or 

IMGN853, when used for the treatment of ovarian cancer. Orphan drug designation provides us with seven years of 
market exclusivity that begins once mirvetuximab soravtansine receives FDA marketing approval for the use for which 
the orphan drug status was granted. Orphan medicinal product designation provides ImmunoGen with ten years of 
market exclusivity that begins once mirvetuximab soravtansine receives European approval for the use for which it was 
granted. We also have been granted Orphan Drug designation for IMGN529 by the FDA and the European Union for the 
treatment of diffuse large B cell lymphoma and may pursue these designations for other indications for other product 
candidates intended for qualifying patient populations. 

Expedited Review and Approval 

The FDA has various programs, including Fast Track, priority review, and accelerated approval, which are 

intended to expedite or simplify the process for reviewing drugs, and/or provide for approval on the basis of surrogate 
endpoints. Even if a drug qualifies for one or more of these programs, the FDA may later decide that the drug no longer 
meets the conditions for qualification or that the time period for FDA review or approval will not be shortened. 
Generally, drugs that may be eligible for these programs are those for serious or life-threatening conditions, those with 
the potential to address unmet medical needs, and those that offer meaningful benefits over existing treatments. For 
example, Fast Track is a process designed to facilitate the development, and expedite the review, of drugs to treat serious 
diseases and fill an unmet medical need. The request may be made at the time of IND submission and generally no later 
than the pre-BLA or pre-NDA meeting. The FDA will respond within 60 calendar days of receipt of the request. Priority 
review, which is requested at the time of BLA or NDA submission, is designed to give drugs that offer major advances 
in treatment or provide a treatment where no adequate therapy exists an initial review within six months as compared to 
a standard review time of ten months. Although Fast Track and priority review do not affect the standards for approval, 
the FDA will attempt to facilitate early and frequent meetings with a sponsor of a Fast Track designated drug and 
expedite review of the application for a drug designated for priority review. Accelerated approval provides an earlier 
approval of drugs to treat serious diseases, and that fill an unmet medical need based on a surrogate endpoint, which is a 
laboratory measurement or physical sign used as an indirect or substitute measurement representing a clinically 
meaningful outcome. Discussions with the FDA about the feasibility of an accelerated approval typically begin early in 
the development of the drug in order to identify, among other things, an appropriate endpoint. As a condition of 
approval, the FDA may require that a sponsor of a drug receiving accelerated approval perform post-marketing clinical 
trials to confirm the appropriateness of the surrogate marker trial. 

In the Food and Drug Administration Safety and Improvement Act, or FDASIA, Congress encouraged the FDA 
to utilize innovative and flexible approaches to the assessment of products under accelerated approval. The law required 
the FDA to issue related draft guidance within a year after the law’s enactment and also promulgate confirming 
regulatory changes. The FDA published a final guidance on May 30, 2014, entitled “Expedited Programs for Serious 
Conditions—Drugs and Biologics.” One of the expedited programs added by FDASIA is that for Breakthrough Therapy. 
A Breakthrough Therapy designation is designed to expedite the development and review of drugs that are intended to 
treat a serious condition where preliminary clinical evidence indicates that the drug may demonstrate substantial 
improvement over available therapy on a clinically significant endpoint(s). A sponsor may request Breakthrough 
Therapy designation at the time that the IND is submitted, or no later than at the end-of-Phase II meeting. The FDA will 
respond to a Breakthrough Therapy designation request within sixty days of receipt of the request. A drug that receives 
Breakthrough Therapy designation is eligible for all fast track designation features, intensive guidance on an efficient 
drug development program, beginning as early as Phase I and commitment from the FDA involving senior managers. 
FDA has already granted this designation to at least 60 new drugs and seven to date have received approval. 

Post-Approval Requirements 

Once an approval is granted, the FDA may withdraw the approval if compliance with regulatory standards is 

not maintained or if problems occur after the product reaches the market. Later discovery of previously unknown 
problems with a product may result in restrictions on the product or even complete withdrawal of the product from the 
market. After approval, some types of changes to the approved product, such as adding new indications, certain 
manufacturing changes and additional labeling claims, are subject to further FDA review and approval. Drug 

22 

manufacturers and other entities involved in the manufacture and distribution of approved drugs are required to register 
their establishments with the FDA and certain state agencies, and are subject to periodic unannounced inspections by the 
FDA and certain state agencies for compliance with cGMP and other laws and regulations. We rely, and expect to 
continue to rely, on third parties for the production of clinical and commercial quantities of our products. Future 
inspections by the FDA and other regulatory agencies may identify compliance issues at the facilities of our contract 
manufacturers that may disrupt production or distribution, or require substantial resources to correct. 

Any drug products manufactured or distributed by us or our partners pursuant to FDA approvals are subject to 

continuing regulation by the FDA, including, among other things, record-keeping requirements, reporting of adverse 
experiences with the drug, providing the FDA with updated safety and efficacy information, drug sampling and 
distribution requirements, complying with certain electronic records and signature requirements, and complying with 
FDA promotion and advertising requirements. FDA strictly regulates labeling, advertising, promotion and other types of 
information on products that are placed on the market. Drugs may be promoted only for the approved indications and in 
accordance with the provisions of the approved label. 

From time to time, legislation is drafted, introduced and passed in Congress that could significantly change the 

statutory provisions governing the approval, manufacturing and marketing of products regulated by the FDA. It is 
impossible to predict whether further legislative changes will be enacted, or FDA regulations, guidance or interpretations 
changed or what the impact of such changes, if any, may be. 

Foreign Regulation 

In addition to regulations in the U.S., we will be subject to a variety of foreign regulations governing clinical 
trials and commercial sales and distribution of our products. Whether or not we obtain FDA approval for a product, we 
must obtain approval by the comparable regulatory authorities of foreign countries or economic areas, such as the 
European Union, before we may commence clinical trials or market products in those countries or areas. The approval 
process and requirements governing the conduct of clinical trials, product licensing, pricing and reimbursement vary 
greatly from place to place, and the time may be longer or shorter than that required for FDA approval. 

Under European Union regulatory systems, a company may submit marketing authorization applications either 
under a centralized or decentralized procedure. The centralized procedure, which is compulsory for medicinal products 
produced by biotechnology or those medicinal products containing new active substances for specific indications such as 
the treatment of AIDS, cancer, neurodegenerative disorders, diabetes, viral diseases and designated orphan medicines, 
and optional for other medicines which are highly innovative. Under the centralized procedure, a marketing application 
is submitted to the European Medicines Agency where it will be evaluated by the Committee for Medicinal Products for 
Human Use and a favorable opinion typically results in the grant by the European Commission of a single marketing 
authorization that is valid for all European Union member states within 67 days of receipt of the opinion. The initial 
marketing authorization is valid for five years, but once renewed is usually valid for an unlimited period. The 
decentralized procedure provides for approval by one or more “concerned” member states based on an assessment of an 
application performed by one member state, known as the “reference” member state. Under the decentralized approval 
procedure, an applicant submits an application, or dossier, and related materials to the reference member state and 
concerned member states. The reference member state prepares a draft assessment and drafts of the related materials 
within 120 days after receipt of a valid application. Within 90 days of receiving the reference member state’s assessment 
report, each concerned member state must decide whether to approve the assessment report and related materials. If a 
member state does not recognize the marketing authorization, the disputed points are eventually referred to the European 
Commission, whose decision is binding on all member states. 

As in the U.S., we may apply for designation of a product as an orphan drug for the treatment of a specific 

indication in the European Union before the application for marketing authorization is made. Orphan drugs in Europe 
enjoy economic and marketing benefits, including up to 10 years of market exclusivity for the approved indication 
unless another applicant can show that its product is safer, more effective or otherwise clinically superior to the 
orphan-designated product. 

Reimbursement 

Sales of pharmaceutical products depend in significant part on the availability of third-party reimbursement. 
Third-party payors include government healthcare programs such as Medicare, managed care providers, private health 
insurers and other organizations. We anticipate third-party payors will provide reimbursement for our products. 

23 

However, these third-party payors are increasingly challenging the price and examining the cost-effectiveness of medical 
products and services. In addition, significant uncertainty exists as to the reimbursement status of newly approved 
healthcare products. We may need to conduct expensive pharmacoeconomic studies in order to demonstrate the 
cost-effectiveness of our products. Our product candidates may not be considered cost-effective. It is time consuming 
and expensive for us to seek reimbursement from third-party payors. Reimbursement may not be available or sufficient 
to allow us to sell our products on a competitive and profitable basis. 

Medicare is a federal healthcare program administered by the federal government that covers individuals age 65 

and over as well as individuals with certain disabilities. Drugs may be covered under one or more sections of Medicare 
depending on the nature of the drug and the conditions associated with and site of administration. For example, under 
Part D, Medicare beneficiaries may enroll in prescription drug plans offered by private entities which provide coverage 
for outpatient prescription drugs. Part D plans include both stand-alone prescription drug benefit plans and prescription 
drug coverage as a supplement to Medicare Advantage plans. Unlike Medicare Part A and B, Part D coverage is not 
standardized. Part D prescription drug plan sponsors are not required to pay for all covered Part D drugs, and each drug 
plan can develop its own drug formulary that identifies which drugs it will cover and at what tier or level. 

Medicare Part B covers most injectable drugs given in an in-patient setting and some drugs administered by a 
licensed medical provider in hospital outpatient departments and doctors’ offices. Medicare Part B is administered by 
Medicare Administrative Contractors, which generally have the responsibility of making coverage decisions. Subject to 
certain payment adjustments and limits, Medicare generally pays for a Part B covered drug based on a percentage of 
manufacturer-reported average sales price which is regularly updated. We believe that most of our drugs, when 
approved, will be subject to the Medicare Part B rules. 

The American Recovery and Reinvestment Act of 2009 provides funding for the federal government to 
compare the effectiveness of different treatments for the same illness. A plan for this research will be developed by the 
Department of Health and Human Services, the Agency for Healthcare Research and Quality and the National Institutes 
for Health, and periodic reports on the status of the research and related expenditures will be made to Congress. 
Although the results of the comparative effectiveness studies are not intended to mandate coverage policies for public or 
private payors, it is not clear what effect, if any, the research will have on the sales of our product candidates, if any such 
product or the condition that it is intended to treat is the subject of a study. It is also possible that comparative 
effectiveness research demonstrating benefits in a competitor’s product could adversely affect the sales of our product 
candidates. If third-party payors do not consider our products to be cost- effective compared to other available therapies, 
they may not cover our products after approval as a benefit under their plans or, if they do, the level of payment may not 
be sufficient to allow us to sell our products on a profitable basis. 

We expect that there will continue to be a number of federal and state proposals to implement governmental 

pricing controls and limit the growth of healthcare costs, including the cost of prescription drugs. For example, the 
Patient Protection and Affordable Care Act, as amended by the Health Care and Education Affordability Reconciliation 
Act of 2010 (collectively, ACA) enacted in March 2010, was expected to have a significant impact on the health care 
industry. ACA has resulted in expanded coverage for the uninsured and is expected to help contain overall healthcare 
costs. With regard to pharmaceutical products, among other things, ACA is expected to expand and increase industry 
rebates for drugs covered under Medicaid programs and make changes to the coverage requirements under the Medicare 
Part D program. We cannot predict the impact of ACA on pharmaceutical companies as many of the ACA reforms 
require the promulgation of detailed regulations implementing the statutory provisions which has not yet occurred. In 
addition, although the U.S. Supreme Court upheld the constitutionality of most of the ACA, some states have stated their 
intentions to not implement certain sections of ACA and some members of Congress are still working to repeal ACA. 
These challenges add to the uncertainty of the changes enacted as part of ACA. 

In addition, in some foreign countries, the proposed pricing for a drug must be approved before it may be 

lawfully marketed. The requirements governing drug pricing vary widely from country to country. For example, the 
European Union provides options for its member states to restrict the range of medicinal products for which their 
national health insurance systems provide reimbursement and to control the prices of medicinal products for human use. 
A member state may approve a specific price for the medicinal product or it may instead adopt a system of direct or 
indirect controls on the profitability of the company placing the medicinal product on the market. There can be no 
assurance that any country that has price controls or reimbursement limitations for pharmaceutical products will allow 
favorable reimbursement and pricing arrangements for any of our products. Historically, products launched in the 
European Union do not follow price structures of the U.S. and generally tend to be significantly lower. 

24 

Research and Development Spending 

During each of the three years ended June 30, 2016, 2015 and 2014, we spent approximately $148.1 million, 

$111.8 million and $107.0 million, respectively, on research and development activities. 

Raw Materials and Manufacturing 

We procure certain raw material components of finished conjugate, including antibodies, cytotoxic agents, and 
linker, for ourselves and on behalf of our collaborators. In order to meet our commitments to our collaborators as well as 
our own needs, we are required to enter into agreements with third parties to produce these components well in advance 
of our production needs. Our principal suppliers for these components include Boehringer Ingelheim, BSP 
Pharmaceuticals S.r.l., SAFC, Inc., Carbogen Amcis and Società Italiana Corticosteroidi S.r.l. 

In addition, we operate a conjugate manufacturing facility. A portion of the cost of operating this facility, 

including the cost of manufacturing personnel, is incurred to conjugate material on behalf of our collaborators for which 
we receive payments based on the number of batches of preclinical and clinical materials produced on their behalf. Over 
the past few years, we have expanded and upgraded the capabilities of our manufacturing facility. 

Employees 

As of June 30, 2016, we had 385 full-time employees, of whom 330 were engaged in research and development 
activities. Of the 330 research and development employees, 172 employees hold post-graduate degrees, of which 78 hold 
Ph.D. degrees and six hold M.D. degrees. We consider our relations with our employees to be good. None of our 
employees is covered by a collective bargaining agreement. 

We have entered into confidentiality agreements with all of our employees, members of our board of directors 

and consultants. Further, we have entered into assignment of invention agreements with all of our employees. 

Third-Party Trademarks 

Avastin, Herceptin, Kadcyla, Keytruda and Rituxan are registered trademarks of their respective owners. 

Probody is a trademark of CytomX Therapeutics, Inc. 

Item 1A.    Risk Factors 

THE RISKS AND UNCERTAINTIES DESCRIBED BELOW ARE THOSE THAT WE CURRENTLY BELIEVE MAY 
MATERIALLY AFFECT OUR COMPANY. ADDITIONAL RISKS AND UNCERTAINTIES THAT WE ARE UNAWARE 
OF OR THAT WE CURRENTLY DEEM IMMATERIAL ALSO MAY BECOME IMPORTANT FACTORS THAT AFFECT 
OUR COMPANY. 

We have a history of operating losses and expect to incur significant additional operating losses. 

We have generated operating losses since our inception. As of June 30, 2016, we had an accumulated deficit of 
$853.7 million. For the years ended June 30, 2016, 2015, and 2014, we generated losses of $144.8 million, $60.7 million 
and $71.4 million, respectively. We may never be profitable. We expect to incur substantial additional operating 
expenses over the next several years as our research, development, preclinical testing, clinical trials and collaborator 
support activities continue. We intend to continue to invest significantly in our product candidates. Further, we expect to 
invest some of our resources to support our existing collaborators as they work to develop, test and commercialize ADC 
compounds. We or our collaborators may encounter technological or regulatory difficulties as part of this development 
and commercialization process that we cannot overcome or remedy. We may also incur substantial marketing and other 
costs in the future if we decide to establish marketing and sales capabilities to commercialize our product candidates. 
Our revenues to date have been primarily from upfront and milestone payments, research and development support and 
clinical materials reimbursement from our collaborative partners and from royalties received from the commercial sales 
of Kadcyla (which we sold the cash rights to for a period of time in April 2015). We do not expect to generate revenues 
from the commercial sale of our internal product candidates in the near future, and we may never generate revenues from 
the commercial sale of internal products. Even if we do successfully develop products that can be marketed and sold 
commercially, we will need to generate significant revenues from those products to achieve and maintain profitability. 
Even if we do become profitable, we may not be able to sustain or increase profitability on a quarterly or annual basis. 

25 

 
If we are unable to obtain additional funding when needed, we may have to delay or scale back some of our 
programs or grant rights to third parties to develop and market our product candidates. 

We will continue to expend substantial resources developing new and existing product candidates, including 

costs associated with research and development, acquiring new technologies, conducting preclinical studies and clinical 
trials, obtaining regulatory approvals and manufacturing products as well as providing certain support to our 
collaborators in the development of their products. In addition, we have a recurring interest payment obligation on our 
Convertible Senior Notes and potentially a repayment obligation on July 1, 2021 unless holders of our debt convert it to 
shares of our stock. We believe that our current working capital and expected future payments from our existing 
collaboration arrangements will be sufficient to meet our current and projected operating and capital requirements 
through December 2017. However, we cannot provide assurance that such collaborative agreement funding will, in fact, 
be received. Should such future collaborator payments not be earned and paid as currently anticipated, we expect we 
could seek additional funding from other sources. We may need additional financing sooner due to a number of other 
factors as well, including: 

• 

• 

if either we incur higher than expected costs or we or any of our collaborators experience slower than 
expected progress in developing product candidates and obtaining regulatory approvals; 

acquisition of technologies and other business opportunities that require financial commitments. 

Additional funding may not be available to us on favorable terms, or at all. We may raise additional funds 

through public or private financings, collaborative arrangements or other arrangements. Debt financing, if available, may 
involve covenants that could restrict our business activities. If we are unable to raise additional funds through equity or 
debt financing when needed, we may be required to delay, scale back or eliminate expenditures for some of our 
development programs, refinance or restructure our debt or grant rights to develop and market product candidates that 
we would otherwise prefer to internally develop and market. If we are required to grant such rights, the ultimate value of 
these product candidates to us may be reduced. 

If our ADC technology does not produce safe, effective and commercially viable products, our business will be 
severely harmed. 

Our ADC technology yields novel product candidates for the treatment of cancer. To date, only one ADC using 
our technology, Kadcyla, has obtained marketing approval. Our ADC product candidates and/or our collaborators’ ADC 
product candidates may not prove to be safe, effective or commercially viable treatments for cancer and our ADC 
technology may not result in any future meaningful benefits to us or for our current or potential collaborative partners. 
Furthermore, we are aware of only two other compounds that are a conjugate of an antibody and a cytotoxic small 
molecule that have obtained marketing approval by the FDA and are based on technology similar to our ADC 
technology. One of these products was later taken off the market by its owner due to toxicity concerns. If our ADC 
technology fails to generate product candidates that are safe, effective and commercially viable treatments for cancer or 
such product candidates fail to obtain FDA approval, our business will be severely harmed. 

Clinical trials for our and our collaborative partners’ product candidates will be lengthy and expensive and their 
outcome is uncertain. 

Before obtaining regulatory approval for the commercial sale of any product candidates, we and our 

collaborative partners must demonstrate through clinical testing that our product candidates are safe and effective for use 
in humans. Conducting clinical trials is a time-consuming, expensive and uncertain process and typically requires years 
to complete. In our industry, the results from preclinical studies and early clinical trials often are not predictive of results 
obtained in later-stage clinical trials. Some compounds that have shown promising results in preclinical studies or early 
clinical trials subsequently fail to establish sufficient safety and efficacy data necessary to obtain regulatory approval. At 
any time during the clinical trials, we, our collaborative partners, or the FDA might delay or halt any clinical trials of our 
product candidates for various reasons, including: 

• 

• 

• 

occurrence of unacceptable toxicities or side effects; 

ineffectiveness of the product candidate; 

insufficient drug supply; 

26 

• 

• 

• 

• 

• 

negative or inconclusive results from the clinical trials, or results that necessitate additional studies or 
clinical trials; 

delays in obtaining or maintaining required approvals from institutions, review boards or other reviewing 
entities at clinical sites; 

delays in patient enrollment; 

insufficient funding or a reprioritization of financial or other resources; or 

other reasons that are internal to the businesses of our collaborative partners, which they may not share 
with us. 

Any failure or substantial delay in successfully completing clinical trials and obtaining regulatory approval for 

our product candidates or our collaborative partners’ product candidates could severely harm our business. 

We and our collaborative partners are subject to extensive government regulations and we and our collaborative 
partners may not be able to obtain necessary regulatory approvals. 

We and our collaborative partners may not receive the regulatory approvals necessary to commercialize our 

product candidates, which would cause our business to be severely harmed. Pharmaceutical product candidates, 
including those in development by us and our collaborative partners, are subject to extensive and rigorous government 
regulation. The FDA regulates, among other things, the development, testing, manufacture, safety, record-keeping, 
labeling, storage, approval, advertising, promotion, sale and distribution of pharmaceutical products. If our potential 
products or our collaborators’ potential products are marketed abroad, they will also be subject to extensive regulation 
by foreign governments. The regulatory review and approval process, which includes preclinical studies and clinical 
trials of each product candidate, is lengthy, complex, expensive and uncertain. Securing FDA approval requires the 
submission of extensive preclinical and clinical data and supporting information to the FDA for each indication to 
establish the product candidate’s safety and efficacy. Data obtained from preclinical studies and clinical trials are 
susceptible to varying interpretation, which may delay, limit or prevent regulatory approval. The approval process may 
take many years to complete and may involve ongoing requirements for post-marketing studies. Any FDA or other 
regulatory approvals of our or our collaborative partners’ product candidates, once obtained, may be withdrawn. The 
effect of government regulation may be to: 

• 

• 

• 

• 

delay marketing of potential products for a considerable period of time; 

limit the indicated uses for which potential products may be marketed; 

impose costly requirements on our activities; and 

place us at a competitive disadvantage to other pharmaceutical and biotechnology companies. 

We may encounter delays or rejections in the regulatory approval process because of additional government 

regulation from future legislation or administrative action or changes in FDA policy during the period of product 
development, clinical trials and FDA regulatory review. Failure to comply with FDA or other applicable regulatory 
requirements may result in criminal prosecution, civil penalties, recall or seizure of products, total or partial suspension 
of production or injunction, as well as other regulatory action against our product candidates or us. Outside the U.S., our 
ability to market a product is contingent upon receiving clearances from the appropriate regulatory authorities. The 
foreign regulatory approval process includes similar risks to those associated with the FDA approval process. In 
addition, we are, or may become, subject to various federal, state and local laws, regulations and recommendations 
relating to safe working conditions, laboratory and manufacturing practices, the experimental use of animals and the use 
and disposal of hazardous substances, including radioactive compounds and infectious disease agents, used in 
connection with our research work. If we fail to comply with the laws and regulations pertaining to our business, we may 
be subject to sanctions, including the temporary or permanent suspension of operations, product recalls, marketing 
restrictions and civil and criminal penalties. 

27 

Our and our collaborative partners’ product candidates will remain subject to ongoing regulatory review even if 
they receive marketing approval. If we or our collaborative partners fail to comply with continuing regulations, 
these approvals could be lost and the sale of our or our collaborative partners’ products could be suspended. 

Even if we or our collaborative partners receive regulatory approval to market a particular product candidate, 
the approval could be conditioned on us or our collaborative partners conducting costly post-approval studies or could 
limit the indicated uses included in product labeling. Moreover, the product may later cause adverse effects that limit or 
prevent its widespread use, force us or our collaborative partners to withdraw it from the market or impede or delay our 
or our collaborative partners’ ability to obtain regulatory approvals in additional countries. In addition, the manufacturer 
of the product and its facilities will continue to be subject to FDA review and periodic inspections to ensure adherence to 
applicable regulations. After receiving marketing approval, the manufacturing, labeling, packaging, adverse event 
reporting, storage, advertising, promotion and record-keeping related to the product remain subject to extensive 
regulatory requirements. We or our collaborative partners may be slow to adapt, or we or our collaborative partners may 
never adapt, to changes in existing regulatory requirements or adoption of new regulatory requirements. 

If we or our collaborative partners fail to comply with the regulatory requirements of the FDA and other 
applicable U.S. and foreign regulatory authorities, or if previously unknown problems with our or our partners’ products, 
manufacturers or manufacturing processes are discovered, we could be subject to administrative or judicially imposed 
sanctions, including: 

• 

restrictions on the products, manufacturers or manufacturing processes; 

•  warning letters; 

• 

• 

• 

• 

• 

• 

• 

• 

• 

civil or criminal penalties; 

fines; 

injunctions; 

product seizures or detentions; 

import bans; 

voluntary or mandatory product recalls and publicity requirements; 

suspension or withdrawal of regulatory approvals; 

total or partial suspension of production; and 

refusal to approve pending applications for marketing approval of new drugs or supplements to approved 
applications. 

Any one of these could have a material adverse effect on our business or financial condition. 

If our collaborative partners fail to perform their obligations under our agreements with them, or determine not 
to continue with clinical trials for particular product candidates, our business could be severely impacted. 

Our strategy for the development and commercialization of our product candidates depends, in large part, upon 

the formation and maintenance of collaborative arrangements. Collaborations provide an opportunity for us to: 

• 

• 

• 

• 

generate cash flow and revenue; 

fund some of the costs associated with our internal research and development, preclinical testing, clinical 
trials and manufacturing; 

seek and obtain regulatory approvals faster than we could on our own; 

successfully commercialize existing and future product candidates; and 

28 

• 

secure access to targets which, due to intellectual property restrictions, would otherwise be unavailable to 
our technology. 

If we fail to secure or maintain successful collaborative arrangements, the development and marketing of 

compounds that use our technology may be delayed, scaled back or otherwise may not occur. In addition, we may be 
unable to negotiate other collaborative arrangements or, if necessary, modify our existing arrangements on acceptable 
terms. We cannot control the amount and timing of resources our collaborative partners may devote to our product 
candidates. Our collaborative partners may separately pursue competing product candidates, therapeutic approaches or 
technologies to develop treatments for the diseases targeted by us or our collaborative efforts, or may decide, for reasons 
not known to us, to discontinue development of product candidates under our agreements with them. Any of our 
collaborative partners may slow or discontinue the development of a product candidate covered by a collaborative 
arrangement for reasons that can include, but are not limited to: 

• 

• 

• 

• 

• 

• 

a change in the collaborative partner’s strategic focus as a result of merger, management changes, adverse 
business events, or other causes; 

a change in the priority of the product candidate relative to other programs in the collaborator’s pipeline; 

a reassessment of the patent situation related to the compound or its target; 

a change in the anticipated competition for the product candidate; 

preclinical studies and clinical trial results; and 

a reduction in the financial resources the collaborator can or is willing to apply to the development of new 
compounds. 

Even if our collaborative partners continue their collaborative arrangements with us, they may nevertheless 

determine not to actively pursue the development or commercialization of any resulting products. Also, our collaborative 
partners may fail to perform their obligations under the collaborative agreements or may be slow in performing their 
obligations. Our collaborative partners can terminate our collaborative agreements under certain conditions. The decision 
to advance a product that is covered by a collaborative agreement through clinical trials and ultimately to 
commercialization is in the discretion of our collaborative partners. If any collaborative partner were to terminate or 
breach our agreements, fail to complete its obligations to us in a timely manner, or decide to discontinue its development 
of a product candidate, our anticipated revenue from the agreement and from the development and commercialization of 
the products would be severely limited. If we are not able to establish additional collaborations or any or all of our 
existing collaborations are terminated and we are not able to enter into alternative collaborations on acceptable terms, or 
at all, our continued development, manufacture and commercialization of our product candidates could be delayed or 
scaled back as we may not have the funds or capability to continue these activities. If our collaborators fail to 
successfully develop and commercialize ADC compounds, our business prospects would be severely harmed. 

We depend on a small number of collaborators for a substantial portion of our revenue. The loss of, or a material 
reduction in activity by, any one of these collaborators could result in a substantial decline in our revenue. 

We have and will continue to have collaborations with a limited number of companies. As a result, our financial 

performance depends on the efforts and overall success of these companies. Also, the failure of any one of our 
collaborative partners to perform its obligations under its agreement with us, including making any royalty, milestone or 
other payments to us, could have an adverse effect on our financial condition. Further, any material reduction by any one 
of our collaborative partners in its level of commitment of resources, funding, personnel, and interest in continued 
development under its agreement with us could have an adverse effect on our financial condition. Also, if consolidation 
trends in the healthcare industry continue, the number of our potential collaborators could decrease, which could have an 
adverse impact on our development efforts. If a present or future collaborator of ours were to be involved in a business 
combination, the collaborator’s continued pursuit and emphasis on our product development program could be delayed, 
diminished or terminated. 

29 

Royalties from commercial sales of Kadcyla will likely fluctuate and will impact our reported royalty revenues 
and rights to receive future payments from the commercial sale of Kadcyla under our license agreement with 
Roche and our royalty purchase agreement with Immunity Royalty Holdings, L.P., or IRH. 

Roche’s Kadcyla is currently the only product with respect to which we are entitled to receive royalties that has 

received marketing approval. In April 2015, IRH paid us $200 million to purchase our right to receive 100% of the 
royalty payments on commercial sales of Kadcyla arising under our development and commercialization license with 
Roche, through its Genentech unit, until IRH has received aggregate Kadcyla royalties equal to $235 million or 
$260 million, depending on when the aggregate Kadcyla royalties received by IRH reach a specified milestone. Once the 
applicable threshold is met, if ever, we will thereafter receive 85% and IRH will receive 15% of the Kadcyla royalties 
for the remaining royalty term. These royalty revenues may fluctuate considerably because they depend upon, among 
other things, the rate of growth of sales of Kadcyla as well as the mix of U.S.-based sales and ex-U.S.-based sales and 
our valid patent claims. While the royalty purchase transaction with IRH has mitigated any impact that fluctuations in 
these royalty revenues may have on our financial condition, negative fluctuations could delay, diminish or eliminate our 
right to resume receiving 85% of the royalty in the future, as described above. 

Royalty rates under our license agreements with our collaborators may vary over the royalty term depending on 
our intellectual property rights and the presence of competing products. 

Most of our license agreements with our collaborators provide that the royalty rates are subject to downward 
adjustment in the absence of ImmunoGen patent rights covering various aspects of the manufacture, use or sale of the 
products developed under such licenses, or in the presence of competition from certain third-party products. For 
example, we expect the royalty rate for Sanofi’s isatuximab anti-CD38 naked antibody compound to be reduced to low 
single digits because of (1) competitor development of alternative anti-CD38 antibody compounds, and (2) the lack of 
ImmunoGen patent rights covering isatuximab, since our ADC-related patent rights do not pertain to the compound and 
our isatuximab -specific patent rights were assigned to Sanofi under the terms of the applicable license. 

We depend on our collaborative partners for the determination of royalty payments. We may not be able to 
detect errors and payment calculations may call for retroactive adjustments. 

The royalty payments we receive are determined by our collaborative partners based on their reported net sales. 

Each collaborative partner’s calculation of the royalty payments is subject to and dependent upon the adequacy and 
accuracy of its sales and accounting functions, and errors may occur from time to time in the calculations made by a 
collaborative partner. Our agreement with Genentech provides us the right to audit the calculations and sales data for the 
associated royalty payments related to sales of Kadcyla; however, such audits may occur many months following our 
recognition of the royalty revenue, may require us to adjust our royalty revenues in later periods and generally require 
audit-related cost on our part. 

If our collaborative partners’ requirements for clinical materials to be manufactured by us are significantly lower 
than we have estimated, our financial results and condition could be adversely affected. 

We procure certain components of finished conjugate, including DM1, DM4, IGN payload agents, and linker, 

on behalf of several of our collaborators. In order to meet our commitments to our collaborative partners, we are required 
to enter into agreements with third parties to produce these components well in advance of our production of clinical 
materials on behalf of our collaborative partners. If our collaborative partners do not require as much clinical material as 
we have contracted to produce and we are unable to use these materials for our own products, we may not be able to 
recover our investment in these components and we may suffer losses. Collaborators have discontinued development of 
product candidates in the past and in the periods subsequent to these discontinuations, we had significantly reduced 
demand for DM1 and DM4 which adversely impacted our financial results. 

In addition, we operate a conjugate manufacturing facility. A portion of the cost of operating this facility, 

including the cost of manufacturing personnel, is reimbursed by our collaborators based on the number of batches of 
preclinical and clinical materials produced on their behalf. If we produce fewer batches of clinical materials for our 
collaborators, a smaller amount of the cost of operating the conjugate manufacturing facility will be charged to our 
collaborative partners and our financial condition could be adversely affected. 

30 

If our product requirements for clinical trials are significantly higher than we estimated, the inability to procure 
additional antibody or fill/finish services in a timely manner could impair our ability to initiate or advance our 
clinical trials. 

We rely on third-party suppliers to manufacture antibodies used in our own proprietary compounds. Due to the 

specific nature of the antibody and availability of production capacity, there is significant lead time required by these 
suppliers to provide us with the needed materials. If our antibody requirements for clinical materials to be manufactured 
are significantly higher than we estimated, we may not be able to readily procure additional antibody which would 
impair our ability to advance our clinical trials currently in process or initiate additional trials. We also rely on third 
parties to convert the bulk drug substance we manufacture into filled and finished vials of drug product for clinical use. 
Unanticipated difficulties or delays in the fill/finish process could impair our ability to advance our clinical trials 
currently in process or initiate additional trials. There can be no assurance that we will not have supply problems that 
could delay or stop our clinical trials or otherwise could have a material adverse effect on our business. 

We currently rely on one third-party manufacturer with commercial production experience to produce our 
cell-killing agents, DM1 and DM4. 

We rely on a third-party supplier to manufacture one of the materials used to make ADC compounds. Our 

cell-killing agents DM1 and DM4, collectively DMx, are manufactured from a precursor, ansamitocin P3. We currently 
use a single supplier, Societá Italiana Corticosteroidi S.r.l., that converts ansamitocin P3 to DMx. Any delay or 
interruption in our supply of DMx could lead to a delay or interruption in our manufacturing operations, preclinical 
studies and clinical trials of our product candidates and our collaborators’ product candidates, which could negatively 
affect our business. 

We may be delayed or unable to establish the manufacturing capabilities necessary to develop and commercialize 
our and our collaborative partners’ potential products. 

Currently, we have one conjugate manufacturing facility that we use to manufacture conjugated compounds for 
us and several of our collaborative partners for preclinical studies and early-stage clinical testing. Several of our partners 
have contracted for separate, large-scale manufacturing capacity to make materials to support potential future 
commercialization of their ADC compounds. We do not currently have the manufacturing capacity needed to make our 
product candidates for commercial sale. In addition, our manufacturing capacity may be insufficient to complete all 
clinical trials contemplated by us and our collaborative partners over time. We intend to rely in part on third-party 
contract manufacturers to produce sufficiently large quantities of drug materials that are and will be needed for 
later-stage clinical trials and commercialization of our potential products. We are currently in the process of developing 
relationships with third-party manufacturers that we believe will be necessary to continue the development of our 
product candidates. Third-party manufacturers may not be able to meet our needs with respect to timing, quantity or 
quality of materials. If we are unable to contract for a sufficient supply of needed materials on acceptable terms, or if we 
should encounter delays or difficulties in our relationships with manufacturers, our clinical trials may be delayed, 
thereby delaying the submission of product candidates for regulatory approval and the market introduction and 
subsequent commercialization of our potential products. Any such delays may lower our revenues and potential 
profitability. 

We have one conjugate manufacturing facility and any prolonged and significant disruption at that facility could 
impair our ability to manufacture our and our collaborative partners’ product candidates for clinical testing. 

Currently, in certain cases, we are contractually obligated to manufacture Phase I and non-pivotal Phase II 

clinical products for companies licensing our ADC technology. We manufacture this material, as well as material for our 
own product candidates, in our conjugate manufacturing facility. We have only one such manufacturing facility in which 
we can manufacture clinical products. Our current manufacturing facility contains highly specialized equipment and 
utilizes complex production processes developed over a number of years that would be difficult, time-consuming and 
costly to duplicate. Any prolonged disruption in the operations of our manufacturing facility would have a significant 
negative impact on our ability to manufacture products for clinical testing on our own and would cause us to seek 
additional third-party manufacturing contracts, thereby increasing our development costs. Even though we carry business 
interruption insurance policies, we may suffer losses as a result of business interruptions that exceed the coverage 
available or any losses which may be excluded under our insurance policies. Certain events, such as natural disasters, 
fire, political disturbances, sabotage or business accidents, which could impact our current or future facilities, could have 

31 

a significant negative impact on our operations by disrupting our product development efforts until such time as we are 
able to repair our facility or put in place third-party contract manufacturers to assume this manufacturing role. 

Unfavorable pricing regulations, third-party reimbursement practices or healthcare reform initiatives applicable 
to our product candidates could limit our potential product revenue. 

Antibody-based anticancer products are often much more costly to produce than traditional chemotherapeutics 
and tend to have significantly higher prices. Factors that help justify the price include the high mortality associated with 
many types of cancer and the need for more and better treatment options. 

Regulations governing drug pricing and reimbursement vary widely from country to country. Some countries 
require approval of the sales price of a drug before it can be marketed. Some countries restrict the physicians that can 
authorize the use of more expensive medications. Some countries establish treatment guidelines to help limit the use of 
more expensive therapeutics and the pool of patients that receive them. In some countries, including the U.S., third-party 
payers frequently seek discounts from list prices and are increasingly challenging the prices charged for medical 
products. Because our product candidates are in the development stage, we do not know the level of reimbursement, if 
any, we will receive for any products that we are able to successfully develop. If the reimbursement for any of our 
product candidates is inadequate in light of our development and other costs, our ability to achieve profitability would be 
affected. 

We believe that the efforts of governments and third-party payors to contain or reduce the cost of healthcare 

will continue to affect the business and financial condition of pharmaceutical and biopharmaceutical companies. A 
number of legislative and regulatory proposals to change the healthcare system in the U.S. and other major healthcare 
markets have been proposed and adopted in recent years. For example, the U.S. Congress enacted a limited prescription 
drug benefit for Medicare recipients as part of the Medicare Prescription Drug, Improvement and Modernization Act of 
2003. While the program established by this statute may increase demand for any products that we are able to 
successfully develop, if we participate in this program, our prices will be negotiated with drug procurement 
organizations for Medicare beneficiaries and are likely to be lower than prices we might otherwise obtain. Non-Medicare 
third-party drug procurement organizations may also base the price they are willing to pay on the rate paid by drug 
procurement organizations for Medicare beneficiaries. The ACA will also require discounts under the Medicare drug 
benefit program and increased rebates on drugs covered by Medicaid. In addition, the ACA imposes an annual fee, 
which will increase annually, on sales by branded pharmaceutical manufacturers. The financial impact of these 
discounts, increased rebates and fees and the other provisions of the ACA on our business is unclear and there can be no 
assurance that our business will not be materially adversely affected by the ACA. In addition, ongoing initiatives in the 
U.S. have increased and will continue to increase pressure on drug pricing. The announcement or adoption of any such 
initiative could have an adverse effect on potential revenues from any product candidate that we may successfully 
develop. 

We may be unable to establish sales and marketing capabilities necessary to successfully commercialize our 
potential products. 

We currently have no direct sales or marketing capabilities. We may rely on third parties to market and sell 

most of our primary product candidates or we may outlicense these products prior to the time when these capabilities are 
needed. If we decide to market our potential products through a direct sales force, we would need either to hire a sales 
force with expertise in pharmaceutical sales or to contract with a third party to provide a sales force which meets our 
needs. We may be unable to establish marketing, sales and distribution capabilities necessary to commercialize and gain 
market acceptance for our potential products and be competitive. In addition, co-promotion or other marketing 
arrangements with third parties to commercialize potential products could significantly limit the revenues we derive 
from these potential products, and these third parties may fail to commercialize our compounds successfully. 

If our product candidates or those of our collaborative partners do not gain market acceptance, our business will 
suffer. 

Even if clinical trials demonstrate the safety and efficacy of our and our collaborative partners’ product 

candidates and the necessary regulatory approvals are obtained, our and our collaborative partners’ products may not 
gain market acceptance among physicians, patients, healthcare payors and other members of the medical community. 

32 

The degree of market acceptance of any products that we or our collaborative partners develop will depend on a number 
of factors, including: 

• 

• 

• 

• 

their level of clinical efficacy and safety; 

their advantage over alternative treatment methods; 

our/the marketer’s and our collaborative partners’ ability to gain acceptable reimbursement and the 
reimbursement policies of government and third-party payors; and 

the quality of the distribution capabilities of the party(ies) responsible to market and distribute the 
product(s). 

Physicians may not prescribe any of our future products until such time as clinical data or other factors 
demonstrate the safety and efficacy of those products as compared to conventional drugs and other treatments. Even if 
the clinical safety and efficacy of therapies using our products is established, physicians may elect not to recommend the 
therapies for any number of other reasons, including whether the mode of administration of our products is effective for 
certain conditions, and whether the physicians are already using competing products that satisfy their treatment 
objectives. Physicians, patients, third-party payors and the medical community may not accept and use any product 
candidates that we, or our collaborative partners, develop. If our products do not achieve significant market acceptance 
and use, we will not be able to recover the significant investment we have made in developing such products and our 
business will be severely harmed. 

We may be unable to compete successfully. 

The markets in which we compete are well established and intensely competitive. We may be unable to 
compete successfully against our current and future competitors. Our failure to compete successfully may result in lower 
volume sold, pricing reductions, reduced gross margins and failure to achieve market acceptance for our potential 
products. Our competitors include research institutions, pharmaceutical companies and biotechnology companies, such 
as Pfizer, Seattle Genetics, Roche, Takeda AbbVie and Bristol-Myers Squibb. Many of these organizations have 
substantially more experience and more capital, research and development, regulatory, manufacturing, human and other 
resources than we do. As a result, they may: 

• 

• 

• 

• 

• 

• 

develop products that are safer or more effective than our product candidates; 

obtain FDA and other regulatory approvals or reach the market with their products more rapidly than we 
can, reducing the potential sales of our product candidates; 

devote greater resources to market or sell their products; 

adapt more quickly to new technologies and scientific advances; 

initiate or withstand substantial price competition more successfully than we can; 

have greater success in recruiting skilled scientific workers from the limited pool of available talent; 

•  more effectively negotiate third-party licensing and collaboration arrangements; and 

• 

take advantage of acquisitions or other opportunities more readily than we can. 

A number of pharmaceutical and biotechnology companies are currently developing products targeting the 
same types of cancer that we target, and some of our competitors’ products have entered clinical trials or already are 
commercially available. 

Our product candidates, if approved and commercialized, will also compete against well-established, existing, 

therapeutic products that are currently reimbursed by government healthcare programs, private health insurers and health 
maintenance organizations. In addition, if our product candidates are approved and commercialized, we may face 
competition from biosimilars. The route to market for biosimilars was established with the passage of the ACA in March 
2010. The ACA establishes a pathway for the FDA approval of follow-on biologics and provides twelve years data 

33 

exclusivity for reference products and an additional six months exclusivity period if pediatric studies are conducted. In 
Europe, the European Medicines Agency has issued guidelines for approving products through an abbreviated pathway, 
and biosimilars have been approved in Europe. If a biosimilar version of one of our potential products were approved in 
the U.S. or Europe, it could have a negative effect on sales and gross profits of the potential product and our financial 
condition. 

We face and will continue to face intense competition from other companies for collaborative arrangements 
with pharmaceutical and biotechnology companies, for relationships with academic and research institutions and for 
licenses to proprietary technology. In addition, we anticipate that we will face increased competition in the future as new 
companies enter our markets and as scientific developments surrounding antibody-based therapeutics for cancer continue 
to accelerate. While we will seek to expand our technological capabilities to remain competitive, research and 
development by others may render our technology or product candidates obsolete or noncompetitive or result in 
treatments or cures superior to any therapy developed by us. 

If we are unable to protect our intellectual property rights adequately, the value of our technology and our 
product candidates could be diminished. 

Our success depends in part on obtaining, maintaining and enforcing our patents and other proprietary rights 

and our ability to avoid infringing the proprietary rights of others. Patent law relating to the scope of claims in the 
biotechnology field in which we operate is still evolving, is surrounded by a great deal of uncertainty and involves 
complex legal, scientific and factual questions. To date, no consistent policy has emerged regarding the breadth of 
claims allowed in biotechnology patents. Accordingly, our pending patent applications may not result in issued patents 
or in patent claims as broad as in the original applications. Although we own numerous patents, the issuance of a patent 
is not conclusive as to its validity or enforceability. Through litigation, a third party may challenge the validity or 
enforceability of a patent after its issuance. 

Patents and applications owned or licensed by us may become the subject of interference, opposition, nullity, or 
other proceedings in a court or patent office in the U.S. or in a foreign jurisdiction to determine validity, enforceability or 
priority of invention, which could result in substantial cost to us. An adverse decision in such a proceeding may result in 
our loss of rights under a patent or patent application. It is unclear how much protection, if any, will be given to our 
patents if we attempt to enforce them or if they are challenged in court or in other proceedings. A competitor may 
successfully invalidate our patents or a challenge could result in limitations of the patents’ coverage. In addition, the cost 
of litigation or interference proceedings to uphold the validity of patents can be substantial. If we are unsuccessful in 
these proceedings, third parties may be able to use our patented technology without paying us licensing fees or royalties. 
Moreover, competitors may infringe our patents or successfully avoid them through design innovation. To prevent 
infringement or unauthorized use, we may need to file infringement claims, which are expensive and time-consuming. In 
an infringement proceeding, a court may decide that a patent of ours is not valid. Even if the validity of our patents were 
upheld, a court may refuse to stop the other party from using the technology at issue on the ground that its activities are 
not covered by our patents. 

The Leahy-Smith America Invents Act was signed into law on September 16, 2011, and became fully effective 

in March 2013. In general, the legislation attempts to address issues surrounding the enforceability of patents and the 
increase in patent litigation by, among other things, moving to a first inventor-to-file system, establishing new 
procedures for challenging patents and establishing different methods for invalidating patents. Governmental 
rule-making implementing the new statute is evolving and will continue to introduce new substantive rules and 
procedures, particularly with regard to post-grant proceedings such as inter partes review and post-grant review. In due 
course, the courts will interpret various aspects of the law and related agency rules in ways that we cannot predict, 
potentially making it easier for competitors and other interested parties to challenge our patents, which, if successful, 
could have a material adverse effect on our business and prospects. In addition, as the United States Supreme Court has 
become increasingly active in reviewing U.S. patent law in recent years, and the extent to which their recent decisions 
will affect our ability to enforce certain types of claims under our U.S. patents or obtain future patents in certain areas is 
difficult to predict at this time. 

Policing unauthorized use of our intellectual property is difficult, and we may not be able to prevent 

misappropriation of our proprietary rights, particularly in countries where the laws may not protect such rights as fully as 
in the U.S. 

34 

In addition to our patent rights, we also rely on unpatented technology, trade secrets, know-how and 
confidential information. Third parties may independently develop substantially equivalent information and techniques 
or otherwise gain access to or disclose our technology. We may not be able to effectively protect our rights in unpatented 
technology, trade secrets, know-how and confidential information. We require each of our employees, consultants and 
corporate partners to execute a confidentiality agreement at the commencement of an employment, consulting or 
collaborative relationship with us. Further, we require that all employees enter into assignment of invention agreements 
as a condition of employment. However, these agreements may not provide effective protection of our information or, in 
the event of unauthorized use or disclosure, they may not provide adequate remedies. 

Any inability to license proprietary technologies or processes from third parties which we use in connection with 
the development and manufacture of our product candidates may impair our business. 

Other companies, universities and research institutions have or may obtain patents that could limit our ability to 
use, manufacture, market or sell our product candidates or impair our competitive position. As a result, we would have to 
obtain licenses from other parties before we could continue using, manufacturing, marketing or selling our potential 
products. Any necessary licenses may not be available on commercially acceptable terms, if at all. If we do not obtain 
required licenses, we may not be able to market our potential products at all or we may encounter significant delays in 
product development while we redesign products or methods that are found to infringe on the patents held by others. 

We may incur substantial costs as a result of litigation or other proceedings relating to patent and other 
intellectual property rights held by third parties and we may be unable to protect our rights to, or to 
commercialize, our product candidates. 

Patent litigation is very common in the biotechnology and pharmaceutical industries. Third parties may assert 
patent or other intellectual property infringement claims against us with respect to our technologies, products or other 
matters. From time to time, we have received correspondence from third parties alleging that we infringe their 
intellectual property rights. Any claims that might be brought against us alleging infringement of patents may cause us to 
incur significant expenses and, if successfully asserted against us, may cause us to pay substantial damages and limit our 
ability to use the intellectual property subject to these claims. Even if we were to prevail, any litigation would be costly 
and time-consuming and could divert the attention of our management and key personnel from our business operations. 
Furthermore, as a result of a patent infringement suit, we may be forced to stop or delay developing, manufacturing or 
selling potential products that incorporate the challenged intellectual property unless we enter into royalty or license 
agreements. There may be third-party patents, patent applications and other intellectual property relevant to our potential 
products that may block or compete with our products or processes. In addition, we sometimes undertake research and 
development with respect to potential products even when we are aware of third-party patents that may be relevant to our 
potential products, on the basis that such patents may be challenged or licensed by us. If our subsequent challenge to 
such patents were not to prevail, we may not be able to commercialize our potential products after having already 
incurred significant expenditures unless we are able to license the intellectual property on commercially reasonable 
terms. We may not be able to obtain royalty or license agreements on terms acceptable to us, if at all. Even if we were 
able to obtain licenses to such technology, some licenses may be non-exclusive, thereby giving our competitors access to 
the same technologies licensed to us. Ultimately, we may be unable to commercialize some of our potential products or 
may have to cease some of our business operations, which could severely harm our business. 

We use hazardous materials in our business, and any claims relating to improper handling, storage or disposal of 
these materials could harm our business. 

Our research and development and manufacturing activities involve the controlled use of hazardous materials, 

chemicals, biological materials and radioactive compounds. We are subject to federal, state and local laws and 
regulations governing the use, manufacture, storage, handling and disposal of these materials and certain waste products. 
Although we believe that our safety procedures for handling and disposing of these materials comply with the standards 
prescribed by applicable laws and regulations, we cannot completely eliminate the risk of accidental contamination or 
injury from these materials. In the event of such an accident, we could be held liable for any resulting damages, and any 
liability could exceed our resources. We may be required to incur significant costs to comply with these laws in the 
future. Failure to comply with these laws could result in fines and the revocation of permits, which could prevent us 
from conducting our business. 

35 

We face product liability risks and may not be able to obtain adequate insurance. 

While we secure waivers from all participants in our clinical trials, the use of our product candidates during 
testing or after approval entails an inherent risk of adverse effects, which could expose us to product liability claims. 
Regardless of their merit or eventual outcome, product liability claims may result in: 

• 

• 

decreased demand for our product; 

injury to our reputation and significant negative media attention; 

•  withdrawal of clinical trial volunteers; 

• 

• 

• 

costs of litigation; 

distraction of management; and 

substantial monetary awards to plaintiffs. 

We may not have sufficient resources to satisfy any liability resulting from these claims. We currently have 

product liability insurance for products which are in clinical testing, however, our coverage may not be adequate in 
scope to protect us in the event of a successful product liability claim. Further, we may not be able to maintain our 
current insurance or obtain general product liability insurance on reasonable terms and at an acceptable cost if we or our 
collaborative partners begin commercial production of our proposed product candidates. This insurance, even if we can 
obtain and maintain it, may not be sufficient to provide us with adequate coverage against potential liabilities. 

Failure to comply with the Foreign Corrupt Practices Act, or FCPA, and other similar anti-corruption laws and 
anti-money laundering laws, as well as export control laws, customs laws, sanctions laws and other laws 
governing our operations could subject us to significant penalties and damage our reputation. 

We are subject to the FCPA, which generally prohibits U.S. companies and intermediaries acting on their behalf 

from offering or making corrupt payments to “foreign officials” for the purpose of obtaining or retaining business or 
securing an improper business advantage. The FCPA also requires companies whose securities are publicly listed in the 
United States to maintain accurate books and records and to maintain adequate internal accounting controls. We are also 
subject to other similar anti-corruption laws and anti-money laundering laws, as well as export control laws, customs 
laws, sanctions laws and other laws that apply to our activities in the countries where we operate. Certain of the 
jurisdictions in which we conduct or expect to conduct business have heightened risks for public corruption, extortion, 
bribery, pay-offs, theft and other fraudulent practices. In many countries, health care professionals who serve as 
investigators in our clinical studies, or may prescribe or purchase our any product candidates if they are approved, are 
employed by a government or an entity owned or controlled by a government. Dealings with these investigators, 
prescribers and purchasers are subject to regulation under the FCPA. Under these laws and regulations, as well as other 
anti-corruption laws, anti-money-laundering laws, export control laws, customs laws, sanctions laws and other laws 
governing our operations, various government agencies may require export licenses, may seek to impose modifications 
to business practices, including cessation of business activities in sanctioned countries or with sanctioned persons or 
entities and modifications to compliance programs, which may increase compliance costs, and may subject us to fines, 
penalties and other sanctions. 

Our employees, independent contractors, principal investigators, contract research organizations, or CROs, 
consultants and collaborators may engage in misconduct or other improper activities, including noncompliance 
with regulatory standards and requirements and insider trading. 

We are exposed to the risk that our employees, independent contractors, principal investigators, CROs, 

consultants and collaborators may engage in fraudulent conduct or other illegal activity. Misconduct by these parties 
could include intentional, reckless and/or negligent conduct or unauthorized activities that violate: (1) laws or 
regulations in jurisdictions where we are performing activities in relation to our product candidates, including those laws 
requiring the reporting of true, complete and accurate information to such authorities; (2) manufacturing regulations and 
standards; (3) applicable laws prohibiting the promotion of a medical product for a use that has not been cleared or 
approved; (4) fraud and abuse, anti-corruption laws and anti-money laundering laws, as well as similar laws and 
regulations and other laws; or (5) laws that require the reporting of true and accurate financial information and data. In 
particular, sales, marketing and business arrangements in the healthcare industry are subject to laws intended to prevent 

36 

fraud, bias, misconduct, kickbacks, self-dealing and other abusive practices, and these laws may differ substantially from 
country to country. Misconduct by these parties could also include the improper use of information obtained in the 
course of clinical trials or performing other services, which could result in investigations, sanctions and serious harm to 
their or our reputation. 

We depend on our key personnel and we must continue to attract and retain key employees and consultants. 

We depend on our key scientific and management personnel. Our ability to pursue the development of our 
current and future product candidates depends largely on retaining the services of our existing personnel and hiring 
additional qualified scientific personnel to perform research and development. We will also need to hire personnel with 
expertise in clinical testing, government regulation, manufacturing, marketing and finance. Attracting and retaining 
qualified personnel will be critical to our success. We may not be able to attract and retain personnel on acceptable terms 
given the competition for such personnel among biotechnology, pharmaceutical and healthcare companies, universities 
and non-profit research institutions. Failure to retain our existing key management and scientific personnel or to attract 
additional highly qualified personnel could delay the development of our product candidates and harm our business. 

Our stock price can fluctuate significantly and results announced by us and our collaborators can cause our stock 
price to decline. 

Our stock price can fluctuate significantly due to business developments announced by us and by our 
collaborators, or as a result of market trends and daily trading volume. The business developments that could impact our 
stock price include disclosures related to clinical findings with compounds that make use of our ADC technology, new 
collaborations and clinical advancement or discontinuation of product candidates that make use of our ADC technology. 
Our stock price can also fluctuate significantly with the level of overall investment interest in small-cap biotechnology 
stocks. 

Our operating results have fluctuated in the past and are likely to continue to do so in the future. Our revenue is 
unpredictable and may fluctuate due to the timing of non-recurring licensing fees, decisions of our collaborative partners 
with respect to our agreements with them, reimbursement for manufacturing services, the achievement of milestones and 
our receipt of the related milestone payments under new and existing licensing and collaboration agreements. Revenue 
historically recognized under our prior collaboration agreements may not be an indicator of revenue from any future 
collaboration. In addition, our expenses are unpredictable and may fluctuate from quarter to quarter due to the timing of 
expenses, which may include obligations to manufacture or supply product or payments owed by us under licensing or 
collaboration agreements. It is possible that our quarterly and/or annual operating results will not meet the expectations 
of securities analysts or investors, causing the market price of our common stock to decline. We believe that 
quarter-to-quarter and year-to-year comparisons of our operating results are not good indicators of our future 
performance and should not be relied upon to predict the future performance of our stock price. 

The potential sale of additional shares of our common stock (including securities convertible into shares of our 
common stock) may cause our stock price to decline. 

On June 20, 2016, we sold $100 million aggregate principal amount of our 4.50% Convertible Senior Notes due 

2021, which are convertible into shares of our common stock at any time prior to the maturity date of the Notes at an 
initial conversion rate of 238.7775 shares per $1,000 principal amount of Notes, which is equal to an initial conversion 
price of approximately $4.19 per share. Conversion of all of the Notes at the initial conversion rate will result in the 
issuance of 23,877,750 shares of our common stock. The potential sale of additional shares of our common stock may be 
dilutive to our shares outstanding and may cause our stock price to decline. 

We do not intend to pay cash dividends on our common stock. 

We have not paid cash dividends since our inception and do not intend to pay cash dividends in the foreseeable 

future. Therefore, shareholders will have to rely on appreciation in our stock price, if any, in order to achieve a gain on 
an investment. 

A WARNING ABOUT FORWARD-LOOKING STATEMENTS 

This report includes forward-looking statements within the meaning of the Private Securities Litigation Reform 
Act of 1995. These statements relate to analyses and other information which are based on forecasts of future results and 

37 

estimates of amounts that are not yet determinable. These statements also relate to our future prospects, developments 
and business strategies. 

These forward-looking statements are identified by their use of terms and phrases, such as “anticipate,” 

“believe,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “predict,” “project,” “will” and other similar terms 
and phrases, including references to assumptions. These statements are contained in the “Business,” “Risk Factors” and 
“Management’s Discussion and Analysis of Financial Condition and Results of Operations” sections, as well as other 
sections of this Annual Report on Form 10-K. 

These forward-looking statements involve known and unknown risks, uncertainties and other factors that may 

cause actual results to be materially different from those contemplated by our forward-looking statements. These known 
and unknown risks, uncertainties and other factors are described in detail in the “Risk Factors” section and in other 
sections of this Annual Report on Form 10-K. We disclaim any intention or obligation to update or revise any 
forward-looking statements, whether as a result of new information, future events or otherwise. 

Item 1B.    Unresolved Staff Comments 

None. 

Item 2.    Properties 

We lease approximately 110,000 square feet of laboratory and office space in a building located at 830 Winter 

Street, Waltham, MA. The term of the 830 Winter Street lease expires on March 31, 2026, with an option for us to 
extend the lease for two additional five-year terms. We also lease approximately 43,850 square feet of space at 333 
Providence Highway, Norwood, MA, which serves as our conjugate manufacturing facility and office space. The 333 
Providence Highway lease expires on June 30, 2018, with an option for us to extend the lease for an additional five-year 
term. Due to space requirements, in April 2013, we entered into a lease agreement for the rental of 7,507 square feet of 
office space at 100 River Ridge Drive, Norwood, MA. The lease expires in September, 2018, with an option for us to 
extend the lease for an additional five-year term. We entered into a sublease in December 2014 for this space, effective 
January 2015 through the remaining initial term of the lease. In February 2016, we entered into a lease agreement for the 
rental of 10,281 square feet of additional office space at 930 Winter Street, Waltham, MA.  The lease expires on August 
31, 2021. 

Item 3.    Legal Proceedings 

From time to time we may be a party to various legal proceedings arising in the ordinary course of our business. 

We are not currently subject to any material legal proceedings. 

Item 3.1.    Executive Officers of the Registrant 

ImmunoGen’s executive officers are appointed by the Board of Directors at the first meeting of the Board 

following the annual meeting of shareholders or at other Board meetings as appropriate, and hold office until the first 
Board meeting following the next annual meeting of shareholders and until a successor is chosen, subject to prior death, 
resignation or removal. Information regarding our executive officers is presented below. 

Mark J. Enyedy, age 52, joined ImmunoGen in May 2016, and has served as our President and Chief Executive 

Officer since that date. Prior to joining ImmunoGen, he served in various executive capacities at Shire plc, a 
pharmaceutical company, from 2013 to May 2016, including as Executive Vice President and Head of Corporate 
Development from 2014 to May 2016, where he led Shire’s strategy, M&A and corporate planning functions and 
provided commercial oversight of Shire’s pre-Phase 3 portfolio. Prior to joining Shire he served as Chief Executive 
Officer of Proteostasis, a biopharmaceutical company, from 2011 to 2013. Prior to joining Proteostasis he served for 15 
years at Genzyme Corporation, a biotechnology company, most recently as President of the Transplant, Oncology, and 
Multiple Sclerosis divisions. Mr. Enyedy holds a JD from Harvard Law School and practiced law prior to joining 
Genzyme. Mr. Enyedy is also a director of Fate Therapeutics, Inc. 

Richard J. Gregory, age 58, joined ImmunoGen in 2015, and has served as our Executive Vice President and 

Chief Scientific Officer since that date. Prior to joining ImmunoGen, he spent 25 years at Genzyme Corporation, a 

38 

 
 
biotechnology company, in roles of increasing responsibility, including Senior Vice President and Head of Research 
from 2003 until Genzyme’s acquisition by Sanofi in 2011, and Head of Research and Development for Genzyme from 
2011 through 2014. Dr. Gregory holds a PhD from the University of Massachusetts, Amherst, and completed his 
post-doctoral work at the Worcester Foundation for Experimental Biology. 

John M. Lambert, PhD, age 65, joined ImmunoGen in 1987, and has served as Executive Vice President and 
Distinguished Research Fellow since January 2015. Prior to that he served as our Executive Vice President and Chief 
Scientific Officer from 2008 through 2014. Dr. Lambert holds a PhD in Biochemistry from University of Cambridge in 
England, and completed his postdoctoral work at the University of California at Davis and at Glasgow University in 
Scotland. 

David B. Johnston, age 61, joined ImmunoGen in 2013, and has served as our Executive Vice President and 

Chief Financial Officer since that date. Prior to joining ImmunoGen, Mr. Johnston served as Chief Financial Officer of 
AVEO Pharmaceuticals, Inc., a biotechnology company, from 2007 to 2013. Prior to that he spent nine years at 
Genzyme Corporation, a biotechnology company, in roles of increasing responsibility, including Vice President, Finance 
and Chief Financial Officer of Genzyme Biosurgery from 1999 to 2003, and as Senior Vice President, Finance, 
Corporate Planning and Analysis from 2003 to 2007. Mr. Johnston holds a Master of Business Administration from the 
University of Michigan. 

Charles Q. Morris, MB, ChB, MRCP (UK), age 51, joined ImmunoGen in 2012, and has served as our 

Executive Vice President and Chief Development Officer since that date. Prior to joining ImmunoGen, he served as 
Executive Vice President and Chief Medical Officer of Allos Therapeutics, Inc., a biotechnology company, from 2010 
until its acquisition in 2012. Prior to that he served as Vice President, Worldwide Clinical Research, at Cephalon, Inc., a 
biotechnology company, from 2008 to 2010. Dr. Morris holds his medical degrees from Sheffield University Medical 
School and is a member of the Royal College of Physicians of London. On August 3, 2016, Dr. Morris provided notice 
to ImmunoGen of his intention to resign, effective as of the close of business on September 2, 2016, in order to pursue 
another professional opportunity closer to his primary residence in Pennsylvania. 

Sandra Poole, age 52, joined ImmunoGen in 2014, and has served as our Executive Vice President of Technical 
Operations since July 1, 2015. Prior to that she served as our Senior Vice President, Technical Operations, from her date 
of hire through June 2015. Prior to joining ImmunoGen, she spent 15 years at Genzyme Corporation, a biotechnology 
company, and its subsidiaries in roles of increasing responsibility, including as Senior Vice President overseeing various 
technical operations within Genzyme from 2009 to 2013, and as Senior Vice President, Biologics Manufacturing from 
2013 to September 2014. Ms. Poole holds a master’s degree in chemical engineering from the University of Waterloo in 
Ontario. 

Craig Barrows, age 61, joined ImmunoGen in 2007, and has served as our Vice President, General Counsel and 

Secretary since that date. 

Ellie Harrison, age 61, joined ImmunoGen in 2014, and has served as our Vice President and Chief Human 

Resources Officer since that date. Prior to joining ImmunoGen, she served as Senior Vice President of Human Resources 
of Blue Cross and Blue Shield of Rhode Island, a healthcare provider, from 2013 to 2014. Prior to that she served as a 
Managing Director and Senior Human Resources Advisor to the global consumer banking organization of Citigroup, a 
financial institution, from 2009 to 2012. 

Peter J. Williams, age 62, joined ImmunoGen in August 2009, and has served as our Vice President, Business 

Development since that date. 

Item 4.    Mine Safety Disclosures 

None. 

39 

 
PART II 

Item 5.    Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity 

Securities 

Market Price of Our Common Stock and Related Stockholder Matters 

Our common stock is quoted on the NASDAQ Global Select Market under the symbol “IMGN.” The table 

below sets forth the high and low closing price per share of our common stock as reported by NASDAQ: 

First Quarter  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Second Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fourth Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fiscal Year 2016 
Low 
High 

Fiscal Year 2015 
Low 
High 
    $ 19.39     $  9.54    $ 12.74     $ 10.28
  $ 13.95   $ 10.04   $ 11.00   $  5.34
  $ 12.85   $  7.02   $  9.55   $  5.85
  $  9.76   $  2.98   $ 15.88   $  7.91

As of August 18, 2016, the closing price per share of our common stock was $3.06, as reported by NASDAQ, 

and we had approximately 503 holders of record of our common stock. 

We have not paid any cash dividends on our common stock since our inception and do not intend to pay any 

cash dividends in the foreseeable future. 

40 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Equity Compensation Plan Information (in thousands) 

(a) 

(b) 

Plan category 
Equity compensation plans approved by security 
holders(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     
Equity compensation plans not approved by 
security holders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     
Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     

  Number of securities to  Weighted(cid:1)average  
  be issued upon exercise 
  of outstanding options,   outstanding options,  
warrants and rights    warrants and rights  

exercise price of 

(c) 
Number of securities 
remaining available for   
future issuance under 
  equity compensation plans 
(excluding securities 
reflected in column (a))   

 11,813   $

 13.03   

 —  
 11,813   $

 —   
13.03   

 3,351

 —
 3,351

(1)  These plans consist of the Restated Stock Option Plan and the 2006 Employee, Director and Consultant Equity 

Incentive Plan. 

Recent Sales of Unregistered Securities; Uses of Proceeds from Registered Securities; Issuer Repurchases of 
Equity Securities 

None. 

Item 6.    Selected Financial Data 

The following table (in thousands, except per share data) sets forth our consolidated financial data for each of 

our five fiscal years through our fiscal year ended June 30, 2016. The information set forth below should be read in 
conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and the 
consolidated financial statements and related notes included elsewhere in this Annual Report on Form 10-K. 

2016 

Year Ended June 30,  
2014 

2015 

2013 

2012 

 184,993  

   139,996  

   131,427   

Consolidated Statement of Operations Data: 
Total revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    $  60,002   $  85,541   $  59,896    $   35,535    $  16,357
 89,614
Total operating expenses  . . . . . . . . . . . . . . . . . . . . . .   
Non-cash interest expense on liability related to sale 
 —
of future royalty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
Other income (expense), net . . . . . . . . . . . . . . . . . . . .   
 (62)
Net loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    $ (144,817)  $  (60,739)  $  (71,364)   $  (72,811)  $  (73,319)
Basic and diluted net loss per common share . . . . . .    $
 (0.95)
Basic and diluted weighted average common shares 
outstanding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
Consolidated Balance Sheet Data: 
Cash and cash equivalents  . . . . . . . . . . . . . . . . . . . . .    $  245,026   $ 278,109   $ 142,261    $  194,960    $ 160,938
   180,308
Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
 —
Long-term convertible notes . . . . . . . . . . . . . . . . . . . .   
 83,890
Shareholders’ (deficit) equity . . . . . . . . . . . . . . . . . . .   

   213,596   
 —   
   121,847   

   165,318   
 —   
 75,699   

   313,823  
 —  
 35,104  

 287,085  
 100,000  
 (82,304) 

 20,130  
 304  

 5,437  
 (847) 

 —   
 167   

 —   
 198   

   108,544   

 (0.83)   $ 

 (1.67)  $

 (0.71)  $

 (0.87)  $

 85,481   

 84,063   

 86,976  

 86,038  

 76,814

41 

 
 
 
 
 
    
    
    
 
 
 
                 
 
 
                 
 
 
 
 
         
 
 
         
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
      
      
      
       
      
 
 
 
 
 
  
 
 
 
 
  
 
 
 
 
  
 
 
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
 
 
 
 
Item 7.    Management’s Discussion and Analysis of Financial Condition and Results of Operations 

Overview 

Since our inception, we have been principally engaged in the development of targeted anticancer agents referred 

to as antibody-drug conjugates, or ADCs. An ADC with our technology consists of a manufactured antibody that binds 
specifically to an antigen target found on the surface of cancer cells with one of our proprietary, highly potent cancer-
killing agents attached. Its antibody component enables an ADC compound to bind specifically to a tumor cell with the 
target antigen on its surface, which the cancer-killing agent can then kill. The cancer-killing agent is attached to the 
antibody using one of our engineered linkers, which control the release and activation of the cancer-killing agent inside 
the tumor cell. With some ADC compounds, the antibody component also has anticancer activity of its own. Our ADC 
technology is designed to enable the creation of highly effective, well-tolerated anticancer products. Our lead ADC 
product candidates employ either DM1 or DM4 as the cancer-killing agent. Both DM1 and DM4, collectively DMx, are 
our proprietary derivatives of maytansine and kill tumor cells by disrupting a process, tubulin formation, the cancer cells 
undergo more frequently than most healthy cells. We also have developed DNA-alkylating agents that we call IGNs. Our 
IMGN779 ADC is the first IGN-utilizing ADC to advance into clinical testing. 

We use our proprietary ADC technology in conjunction with our extensive antibody expertise to develop our 

own anticancer product candidates. We also enter into agreements that enable companies to use our ADC technology to 
develop and commercialize product candidates to specified targets. Under the terms of our agreements, we are generally 
entitled to upfront fees, milestone payments, and royalties on any commercial product sales. In addition, under certain 
agreements we are compensated for research and development activities performed at our collaborative partner’s request 
at negotiated prices which are generally consistent with what other third parties would charge. We are compensated to 
manufacture preclinical and clinical materials and deliver cytotoxic agent material at negotiated prices which are 
generally consistent with what other third parties would charge. Currently, our partners include Amgen, Bayer, Biotest, 
Lilly, Novartis, Roche, Sanofi and Takeda. We also have a research agreement with CytomX Therapeutics that allows 
each company to develop product candidates to a specified number of cancer targets using CytomX’s Probody™ 
antibody-masking technology with our payload agents and engineered linkers. We expect that substantially all of our 
revenue for the foreseeable future will result from payments under our collaborative arrangements. Details for some of 
our major and recent collaborative agreements can be found in this Form 10-K under Item 1. Business. 

To date, we have not generated revenues from commercial sales of internal products and we expect to incur 

significant operating losses for the foreseeable future. As of June 30, 2016, we had approximately $245.0 million in cash 
and cash equivalents compared to $278.1 million as of June 30, 2015. 

We anticipate that future cash expenditures will be partially offset by collaboration-derived proceeds, including 

milestone payments and upfront fees. Accordingly, period-to-period cash balances may fluctuate dramatically based 
upon the timing of receipt of the proceeds. We believe that our established collaborative agreements, while subject to 
specified milestone achievements, will provide funding to assist us in meeting obligations under our collaborative 
agreements while also assisting in providing funding for the development of internal product candidates and 
technologies. However, we can give no assurances that such collaborative agreement funding will, in fact, be realized in 
the time frames we expect, or at all. Should we or our partners not meet some or all of the terms and conditions of our 
various collaboration agreements, we may be required to secure alternative financing arrangements, find additional 
partners and/or defer or limit some or all of our research, development and/or clinical projects. However, we cannot 
provide assurance that any such opportunities presented by additional partners or alternative financing arrangements will 
be entirely available to us, if at all. 

Critical Accounting Policies 

We prepare our consolidated financial statements in accordance with accounting principles generally accepted 

in the U.S. The preparation of these financial statements requires us to make estimates and judgments that affect the 
reported amounts of assets, liabilities, revenues and expenses and related disclosure of contingent assets and liabilities. 
On an on-going basis, we evaluate our estimates, including those related to our collaborative agreements, clinical trial 
accruals, inventory and stock-based compensation. We base our estimates on historical experience and various other 
assumptions that we believe to be reasonable under the circumstances. Actual results may differ from these estimates. 

We believe the following critical accounting policies reflect our more significant judgments and estimates used 

in the preparation of our consolidated financial statements. 

42 

Revenue Recognition 

We enter into licensing and development agreements with collaborative partners for the development of 
monoclonal antibody-based anticancer therapeutics. The terms of these agreements contain multiple deliverables which 
may include (i) licenses, or options to obtain licenses, to our ADC technology, (ii) rights to future technological 
improvements, (iii) research activities to be performed on behalf of the collaborative partner, (iv) delivery of cytotoxic 
agents and (v) the manufacture of preclinical or clinical materials for the collaborative partner. Payments to us under 
these agreements may include upfront fees, option fees, exercise fees, payments for research activities, payments for the 
manufacture of preclinical or clinical materials, payments based upon the achievement of certain milestones and 
royalties on product sales. We follow the provisions of the Financial Accounting Standards Board, or FASB, Accounting 
Standards Codification, or ASC, Topic 605-25, “Revenue Recognition—Multiple-Element Arrangements,” and ASC 
Topic 605-28, “Revenue Recognition—Milestone Method,” in accounting for these agreements. In order to account for 
these agreements, we must identify the deliverables included within the agreement and evaluate which deliverables 
represent separate units of accounting based on whether certain criteria are met, including whether the delivered element 
has stand-alone value to the collaborator. The consideration received is allocated among the separate units of accounting, 
and the applicable revenue recognition criteria are applied to each of the separate units. 

At June 30, 2016, we had the following two types of agreements with the parties identified below: 

•  Development and commercialization licenses, which provide the party with the right to use our ADC 

technology and/or certain other intellectual property to develop compounds to a specified antigen target: 

Amgen (two exclusive single-target licenses*) 

Bayer HealthCare (one exclusive single-target license) 

Biotest (one exclusive single-target license) 

Lilly (three exclusive single-target licenses) 

Novartis (five exclusive single-target licenses and one license to two related targets: one target on an 
exclusive basis and the second target on a non-exclusive basis) 

Roche, through its Genentech unit (five exclusive single-target licenses) 

Sanofi (one exclusive single-target license and one exclusive license to multiple individual targets) 

Takeda, through its wholly owned subsidiary, Millennium Pharmaceuticals, Inc. (one exclusive 
single-target license) 

•  Research license/option agreement for a defined period of time to secure development and 

commercialization licenses to use our ADC technology to develop anticancer compounds to specified 
targets on established terms (referred to herein as right-to-test agreements): 

CytomX 

Takeda, through its wholly owned subsidiary, Millennium Pharmaceuticals, Inc. 

*  Amgen has sublicensed one of its exclusive single-target licenses to Oxford BioTherapeutics Ltd. 

There are no performance, cancellation, termination or refund provisions in any of the arrangements that 

contain material financial consequences to us. 

Development and Commercialization Licenses 

The deliverables under a development and commercialization license agreement generally include the license to 

our ADC technology with respect to a specified antigen target, and may also include deliverables related to rights to 
future technological improvements, research activities to be performed on behalf of the collaborative partner and the 
manufacture of preclinical or clinical materials for the collaborative partner. 

43 

Generally, development and commercialization licenses contain non-refundable terms for payments and, 

depending on the terms of the agreement, provide that we will (i) at the collaborator’s request, provide research services 
at negotiated prices which are generally consistent with what other third parties would charge, (ii) at the collaborator’s 
request, manufacture and provide to it preclinical and clinical materials or deliver cytotoxic agents at negotiated prices 
which are generally consistent with what other third parties would charge, (iii) earn payments upon the achievement of 
certain milestones and (iv) earn royalty payments, generally until the later of the last applicable patent expiration or 10 to 
12 years after product launch. In the case of Kadcyla, however, the minimum royalty term is 10 years and the maximum 
royalty term is 12 years on a country-by-country basis, regardless of patent protection. Royalty rates may vary over the 
royalty term depending on our intellectual property rights and/or the presence of comparable competing products. We 
may provide technical assistance and share any technology improvements with our collaborators during the term of the 
collaboration agreements. We do not directly control when or whether any collaborator will request research or 
manufacturing services, achieve milestones or become liable for royalty payments. As a result, we cannot predict when 
or if we will recognize revenues in connection with any of the foregoing. 

In determining the units of accounting, management evaluates whether the license has stand-alone value from 
the undelivered elements to the collaborative partner based on the consideration of the relevant facts and circumstances 
for each arrangement. Factors considered in this determination include the research capabilities of the partner and the 
availability of ADC technology research expertise in the general marketplace. If we conclude that the license has 
stand-alone value and therefore will be accounted for as a separate unit of accounting, we then determine the estimated 
selling prices of the license and all other units of accounting based on market conditions, similar arrangements entered 
into by third parties, and entity-specific factors such as the terms of our previous collaborative agreements, recent 
preclinical and clinical testing results of therapeutic products that use our ADC technology, our pricing practices and 
pricing objectives, the likelihood that technological improvements will be made, and, if made, will be used by our 
collaborators and the nature of the research services to be performed on behalf of our collaborators and market rates for 
similar services. 

Upfront payments on development and commercialization licenses may be recognized upon delivery of the 
license if facts and circumstances dictate that the license has stand-alone value from the undelivered elements, which 
generally include rights to future technological improvements, research services, delivery of cytotoxic agents and the 
manufacture of preclinical and clinical materials. 

We recognize revenue related to research services that represent separate units of accounting as they are 

performed, as long as there is persuasive evidence of an arrangement, the fee is fixed or determinable, and collection of 
the related receivable is probable. We recognize revenue related to the rights to future technological improvements over 
the estimated term of the applicable license. 

We may also provide cytotoxic agents to our collaborators or produce preclinical and clinical materials for them 
at negotiated prices which are generally consistent with what other third parties would charge. We recognize revenue on 
cytotoxic agents and on preclinical and clinical materials when the materials have passed all quality testing required for 
collaborator acceptance and title and risk of loss have transferred to the collaborator. Arrangement consideration 
allocated to the manufacture of preclinical and clinical materials in a multiple-deliverable arrangement is below our full 
cost, and our full cost is not expected to ever be below our contract selling prices for our existing collaborations. During 
the fiscal years ended June 30, 2016, 2015 and 2014, the difference between our full cost to manufacture preclinical and 
clinical materials on behalf of our collaborators as compared to total amounts received from collaborators for the 
manufacture of preclinical and clinical materials was $6.9 million, $9.2 million, and $2.3 million, respectively. The 
majority of our costs to produce these preclinical and clinical materials are fixed and then allocated to each batch based 
on the number of batches produced during the period. Therefore, our costs to produce these materials are significantly 
impacted by the number of batches produced during the period. The volume of preclinical and clinical materials we 
produce is directly related to the number of clinical trials we and our collaborators are preparing for or currently have 
underway, the speed of enrollment in those trials, the dosage schedule of each clinical trial and the time period such 
trials last. Accordingly, the volume of preclinical and clinical materials produced, and therefore our per-batch costs to 
manufacture these preclinical and clinical materials, may vary significantly from period to period. 

We may also produce research material for potential collaborators under material transfer agreements. 
Additionally, we perform research activities, including developing antibody specific conjugation processes, on behalf of 
our collaborators and potential collaborators during the early evaluation and preclinical testing stages of drug 
development. We record amounts received for research materials produced or services performed as a component of 
research and development support revenue. We also develop conjugation processes for materials for later stage testing 

44 

and commercialization for certain collaborators. We are compensated at negotiated rates and may receive milestone 
payments for developing these processes which are recorded as a component of research and development support 
revenue. 

Our development and commercialization license agreements have milestone payments which for reporting 
purposes are aggregated into three categories: (i) development milestones, (ii) regulatory milestones, and (iii) sales 
milestones. Development milestones are typically payable when a product candidate initiates or advances into different 
clinical trial phases. Regulatory milestones are typically payable upon submission for marketing approval with the FDA 
or other countries’ regulatory authorities or on receipt of actual marketing approvals for the compound or for additional 
indications. Sales milestones are typically payable when annual sales reach certain levels. 

At the inception of each agreement that includes milestone payments, we evaluate whether each milestone is 

substantive and at risk to both parties on the basis of the contingent nature of the milestone. This evaluation includes an 
assessment of whether (a) the consideration is commensurate with either (1) the entity’s performance to achieve the 
milestone, or (2) the enhancement of the value of the delivered item(s) as a result of a specific outcome resulting from 
the entity’s performance to achieve the milestone, (b) the consideration relates solely to past performance and (c) the 
consideration is reasonable relative to all of the deliverables and payment terms within the arrangement. We evaluate 
factors such as the scientific, regulatory, commercial and other risks that must be overcome to achieve the respective 
milestone, the level of effort and investment required to achieve the respective milestone and whether the milestone 
consideration is reasonable relative to all deliverables and payment terms in the arrangement in making this assessment. 

Non-refundable development and regulatory milestones that are expected to be achieved as a result of our 

efforts during the period of substantial involvement are considered substantive and are recognized as revenue upon the 
achievement of the milestone, assuming all other revenue recognition criteria are met. Milestones that are not considered 
substantive because we do not contribute effort to the achievement of such milestones are generally achieved after the 
period of substantial involvement and are recognized as revenue upon achievement of the milestone, as there are no 
undelivered elements remaining and no continuing performance obligations, assuming all other revenue recognition 
criteria are met. 

Under our development and commercialization license agreements, we receive royalty payments based upon 
our licensees’ net sales of covered products. Generally, under these agreements we are to receive royalty reports and 
payments from our licensees approximately one quarter in arrears, that is, generally in the second or third month of the 
quarter after the licensee has sold the royalty bearing product or products. We recognize royalty revenues when we can 
reliably estimate such amounts and collectability is reasonably assured. As such, we generally recognize royalty 
revenues in the quarter reported to us by our licensees, or one quarter following the quarter in which sales by our 
licensees occurred. 

Right-to-Test Agreements 

Our right-to-test agreements provide collaborators the right to (a) test our ADC technology for a defined period 
of time through a research, or right-to-test, license, (b) take options, for a defined period of time, to specified targets and 
(c) upon exercise of those options, secure or “take” licenses to develop and commercialize products for the specified 
targets on established terms. Under these agreements, fees may be due to us (i) at the inception of the arrangement 
(referred to as “upfront” fees or payments), (ii) upon taking an option with respect to a specific target (referred to as 
option fees or payments earned, if any, when the option is “taken”), (iii) upon the exercise of a previously taken option 
to acquire a development and commercialization license(s) (referred to as exercise fees or payments earned, if any, when 
the development and commercialization license is “taken”), or (iv) some combination of all of these fees. 

The accounting for right-to-test agreements is dependent on the nature of the option granted to the collaborative 

partner. Options are considered substantive if, at the inception of a right-to-test agreement, we are at risk as to whether 
the collaborative partner will choose to exercise the options to secure development and commercialization licenses. 
Factors that are considered in evaluating whether options are substantive include the overall objective of the 
arrangement, the benefit the collaborator might obtain from the agreement without exercising the options, the cost to 
exercise the options relative to the total upfront consideration, and the additional financial commitments or economic 
penalties imposed on the collaborator as a result of exercising the options. None of our right-to-test agreements entered 
into subsequent to the adoption of Accounting Standards Update, or ASU, No. 2009-13 has been determined to contain 
substantive options. For right-to-test agreements where the options to secure development and commercialization 
licenses to our ADC technology are not considered substantive, we consider the development and commercialization 

45 

license to be a deliverable at the inception of the agreement and apply the multiple-element revenue recognition criteria 
to determine the appropriate revenue recognition. Subsequent to the adoption of ASU No. 2009-13, we determined that 
our research licenses lack stand-alone value and are considered for aggregation with the other elements of the 
arrangement and accounted for as one unit of accounting. 

We do not directly control when or if any collaborator will exercise its options for development and 

commercialization licenses. As a result, we cannot predict when or if we will recognize revenues in connection with any 
of the foregoing. 

Inventory 

We review our estimates of the net realizable value of our inventory at each reporting period. Our estimate of 

the net realizable value of our inventory is subject to judgment and estimation. The actual net realizable value of our 
inventory could vary significantly from our estimates. We consider quantities of raw materials in excess of twelve-month 
projected usage that are not supported by firm, fixed collaborator orders and projections at the time of the assessment to 
be excess. During fiscal years 2016, 2015 and 2014, we obtained additional quantities of DMx from our supplier which 
amounted to more material than would be required by our collaborators over the next twelve months and as a result, we 
recorded $1.1 million, $1.0 million and $364,000, respectively, of charges to research and development expense related 
to raw material inventory identified as excess. Our collaborators’ estimates of their clinical material requirements are 
based upon expectations of their clinical trials, including the timing, size, dosing schedule and the maximum tolerated 
dose likely to be reached for the compound being evaluated. Our collaborators’ actual requirements for clinical materials 
may vary significantly from their projections. Significant differences between our collaborators’ actual manufacturing 
orders and their projections could result in our actual twelve-month usage of raw materials varying significantly from 
our estimated usage at an earlier reporting period. Such differences and/or reductions in collaborators’ projections could 
indicate that we have excess raw material inventory and we would then evaluate the need to record write-downs, which 
would be included as charges to research and development expense. 

Stock-based Compensation 

As of June 30, 2016, we are authorized to grant future awards under one share-based compensation plan, which 

is the ImmunoGen, Inc. 2006 Employee, Director and Consultant Equity Incentive Plan. The stock-based awards are 
accounted for under ASC Topic 718, “Compensation—Stock Compensation,” pursuant to which the estimated grant date 
fair value of awards is charged to the statement of operations over the requisite service period, which is the vesting 
period. Such amounts have been reduced by our estimate of forfeitures for unvested awards. 

The fair value of each stock option is estimated on the date of grant using the Black-Scholes option-pricing 
model. Expected volatility is based exclusively on historical volatility data of our stock. The expected term of stock 
options granted is based exclusively on historical data and represents the period of time that stock options granted are 
expected to be outstanding. The expected term is calculated for and applied to one group of stock options as we do not 
expect substantially different exercise or post-vesting termination behavior amongst our employee population. The 
risk-free rate of the stock options is based on the U.S. Treasury rate in effect at the time of grant for the expected term of 
the stock options. Estimated forfeitures are based on historical data as well as current trends. Stock compensation cost 
related to stock options and restricted stock incurred during the years ended June 30, 2016, 2015 and 2014 was 
$21.9 million, $15.3 million and $15.6 million, respectively. During fiscal year 2016, we recorded approximately $3.1 
million of stock compensation cost related to the modification of certain outstanding common stock options with the 
former Chief Executive Officer’s succession plan. Stock compensation cost related to director deferred share units 
recorded during the years ended June 30, 2016, 2015 and 2014 was $380,000, $389,000 and $433,000, respectively.  

Future stock-based compensation may significantly differ based on changes in the fair value of our common 

stock and our estimates of expected volatility and the other relevant assumptions. 

Results of Operations 

Revenues 

Our total revenues for the year ended June 30, 2016 were $60.0 million compared with $85.5 million and 

$59.9 million for the years ended June 30, 2015 and 2014, respectively. The $25.5 million decrease in revenues in fiscal 
year 2016 is attributable to a decrease in license and milestone fees, royalty revenue and clinical materials revenue, 
partially offset by an increase in non-cash royalty revenue and research and development support revenue. The 

46 

$25.6 million increase in revenues in fiscal year 2015 compared to fiscal 2014 is attributable to an increase in license and 
milestone fees, royalty revenue, non-cash royalty revenue and clinical materials revenue, partially offset by a decrease in 
research and development support revenue, all of which are discussed below. 

Revenue from license and milestone fees for the year ended June 30, 2016 decreased approximately 
$30.9 million to $26.9 million from $57.8 million in the year ended June 30, 2015. Revenue from license and milestone 
fees for the year ended June 30, 2014 was $39.5 million. Included in license and milestone fees for the year ended June 
30, 2016 is $8.6 million of license revenue earned upon the execution of a development and commercialization license 
taken by Takeda, a $5 million development milestone achieved under a license agreement with Lilly, a $1 million 
development milestone achieved under a license agreement with Amgen, a $2 million development milestone achieved 
under a license agreement with Sanofi and a $10 million development milestone achieved under a license agreement 
with Bayer. Included in license and milestone fees for the year ended June 30, 2015 is $15.6 million of license revenue 
earned upon the execution of two development and commercialization licenses by Lilly, $25.7 million of license revenue 
earned upon the execution of three development and commercialization licenses by Novartis, two $5 million 
development milestones achieved under our collaboration agreement with Novartis and $4 million in development 
milestones achieved under our collaboration agreement with Sanofi. Also, during fiscal 2015, we made a change in 
estimate to our period of substantial involvement as it relates to an exclusive license with Sanofi which resulted in an 
increase to license and milestone fees of $1.5 million in fiscal 2015 compared to amounts that would have been 
recognized pursuant to the Company’s previous estimate. Additionally, during fiscal 2015, Janssen Biotech terminated 
its exclusive development and commercialization license with us, and as a result, we recognized the remaining $241,000 
of the $1 million upfront fee received upon execution of the license which had been previously deferred. Included in 
license and milestone fees for the year ended June 30, 2014 is $7.8 million of license revenue earned upon the execution 
of a development and commercialization license by Lilly, two $5 million regulatory milestones achieved under our 
collaboration agreement with Roche, $18.2 million of license revenue earned upon the execution of two development 
and commercialization licenses and a one-year extension of the original term of the multi-target agreement by Novartis, 
and $2.2 million of revenue from Amgen related to a modification of an existing arrangement. The amount of license 
and milestone fees we earn is directly related to the number of our collaborators, the collaborators’ advancement of the 
product candidates, and the overall success in the clinical trials of the product candidates. As such, the amount of license 
and milestone fees may vary widely from quarter to quarter and year to year. Total revenue recognized from license and 
milestone fees from each of our collaborative partners in the years ended June 30, 2016, 2015 and 2014 is included in the 
following table (in thousands): 

License and Milestone Fees 
Collaborative Partner: 

Year Ended June 30,  
2015 

2014 

2016 

Amgen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $  1,017   $
Bayer HealthCare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Biotest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Janssen  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Lilly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Novartis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Roche  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Sanofi  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Takeda . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  

 17    $  2,351   
   —   
—   
 25   
 25   
   —   
 241   
    7,830   
   15,644   
   18,353   
   35,915   
   10,000   
—   
 896   
 5,973   
—   
—   
Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $ 26,915   $ 57,815    $ 39,455   

   10,000  
 12  
 —  
 5,023  
 180  
 —  
 2,009  
 8,674  

Deferred revenue of $32.9 million at June 30, 2016 represents payments received from our collaborators 
pursuant to our license agreements which we have yet to earn pursuant to our revenue recognition policy. Included 
within this amount is $13 million of non-cash consideration recorded in connection with our arrangement with CytomX 
during fiscal 2014. 

In February 2013, the US FDA granted marketing approval to Kadcyla, an ADC product resulting from one of 

our development and commercialization licenses with Roche, through its Genentech unit. We receive royalty reports and 
payments related to sales of Kadcyla from Roche one quarter in arrears. In accordance with our revenue recognition 
policy, $25.3 million of non-cash royalties on net sales of Kadcyla for the twelve-month period ended March 31, 2016 
were recorded and included in royalty revenue for the year ended June 30, 2016 and $5.5 million of non-cash royalties 
and $13.9 million of cash royalties on net sales of Kadcyla for the twelve-month period ended March 31, 2015 is 
included in royalty revenue for the year ended June 30, 2015. We recorded $10.3 million of cash royalties on net sales of 

47 

 
 
 
 
 
 
 
 
    
 
 
 
 
 
    
       
    
 
 
 
  
 
 
 
 
 
 
 
 
  
 
Kadcyla for the twelve-month period ended March 31, 2014 for the year ended June 30, 2014. Kadcyla sales occurring 
after January 1, 2015 are covered by a royalty purchase agreement whereby the associated cash is remitted to Immunity 
Royalty Holdings, L.P. See further details regarding royalty obligation in Note F of the Consolidated Financial 
Statements. We expect royalty revenue to increase in future periods as the underlying net sales of Kadcyla increase. 

Research and development support revenue was $4.0 million, $2.8 million, and $7.2 million for the fiscal years 
ended June 30, 2016, 2015 and 2014, respectively. These amounts primarily represent research funding earned based on 
actual resources utilized under our agreements with our collaborators as shown in the table below. Also included in 
research and development support revenue are fees for developing antibody-specific conjugation processes on behalf of 
our collaborators and potential collaborators during the early evaluation and preclinical testing stages of drug 
development. The amount of research and development support revenue we earn is directly related to the number of our 
collaborators and potential collaborators, the stage of development of our collaborators’ product candidates and the 
resources our collaborators allocate to the development effort. As such, the amount of development fees may vary 
widely from quarter to quarter and year to year. Total revenue recognized from research and development support from 
each of our collaborative partners in the years ended June 30, 2016, 2015 and 2014 is included in the following table (in 
thousands): 

Research and Development Support 
Collaborative Partner: 

Year Ended June 30,  
2015 

2014 

2016 

Amgen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $
Biotest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
CytomX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Lilly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Novartis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Takeda . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  

 30   $  105    $  404   
 645   
 783   
  —   
 59   
   2,906   
   1,207   
   3,012   
 512   
   —   
 264   
 82   
 56   
Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $ 4,014   $ 2,848    $ 7,187   

 338  
 1,673  
 479  
 164  
   1,066  
 264  

Clinical materials revenue decreased by approximately $1.9 million to $3.6 million in the year ended June 30, 

2016 compared to $5.5 million in the year ended June 30, 2015. We earned clinical materials revenue of $2.9 million 
during the year ended June 30, 2014. During the years ended June 30, 2016, 2015 and 2014, we shipped clinical 
materials in support of a number of our collaborators’ clinical trials, as well as preclinical materials in support of certain 
collaborators’ development efforts and DMx shipments to certain collaborators in support of development and 
manufacturing efforts. We are compensated at negotiated prices which are generally consistent with what other 
third-parties would charge. The amount of clinical materials revenue we earn, and the related cost of clinical materials 
charged to research and development expense, is directly related to the number of clinical trials our collaborators who 
use us to manufacture clinical materials are preparing or have underway, the speed of enrollment in those trials, the 
dosage schedule of each clinical trial and the time period, if any, during which patients in the trial receive clinical benefit 
from the clinical materials, and the demand our collaborators have for clinical-grade material for process development 
and analytical purposes. As such, the amount of clinical materials revenue and the related cost of clinical materials 
charged to research and development expense may vary significantly from quarter to quarter and year to year. 

Research and Development Expenses 

Our research and development expenses relate to (i) research to evaluate new targets and to develop and 

evaluate new antibodies, linkers and cytotoxic agents, (ii) preclinical testing of our own and, in certain instances, our 
collaborators’ product candidates, and the cost of our own clinical trials, (iii) development related to clinical and 
commercial manufacturing processes and (iv) manufacturing operations which also includes raw materials. Our research 
and development efforts have been primarily focused in the following areas: 

• 

• 

• 

• 

evaluation of potential antigen targets; 

evaluation of internally developed and/or in-licensed product candidates and technologies; 

development and evaluation of additional cytotoxic agents and linkers; 

activities related to the process, preclinical and clinical development of our internal product candidates; 

48 

 
 
 
 
 
 
 
 
    
 
 
 
 
     
          
           
    
 
 
  
 
 
 
 
 
 
 
  
• 

• 

• 

• 

• 

• 

• 

• 

process improvements to our ADC technology; 

process improvements related to the production of IGNs; 

process improvements related to the production of DM1, DM4 and strain development of their precursor, 
ansamitocin P3; 

operation and maintenance of our conjugate manufacturing facility, including production of our own and 
our collaborators’ clinical materials; 

production costs for the supply of clinical material for our internal product candidates, including antibody 
supply, conjugation services and fill/finish services; 

production costs for the supply of IGNs and DMx for our and our partners’ preclinical and clinical 
activities; 

non-pivotal and pivotal development activities with contract manufacturers for conjugation, fill/finish 
services and the antibody component of our internal product candidates, linkers, and DM1, DM4 and their 
precursor, ansamitocin P3; and 

activities pursuant to our development and license agreements with various collaborators. 

Research and development expense for the year ended June 30, 2016 increased $36.3 million to $148.1 million 

from $111.8 million for the year ended June 30, 2015. Research and development expense was $107.0 million for the 
year ended June 30, 2014. During the year ended June 30, 2014, we recorded a $12.8 million non-cash charge to 
research and development expense for technology rights obtained under the collaboration agreement executed with 
CytomX in January 2014. We had no such charges in fiscal years 2016 and 2015. The increases in fiscal years 2016 and 
2015 are primarily due to: (i) increased clinical trial costs, particularly related to mirvetuximab soravtansine; (ii) greater 
third-party costs related to internal product program advancement; (iii) increase in facility-related expenses due 
primarily to additional laboratory and office space occupied since July 2014 and increased depreciation and amortization 
related to major capital equipment and improvements; and (iv) increased personnel expenses, principally due to recent 
hiring and incentive compensation. Research and development salaries and related expenses increased by $10.6 million 
to $63.2 million in the year ended June 30, 2016 compared to the year ended June 30, 2015 and increased by $5 million 
in the year ended June 30, 2015 compared to the year ended June 30, 2014. The average number of our research 
personnel increased to 295 for the year ended June 30, 2016 compared to 266 for the year ended June 30, 2015. We had 
an average of 250 for the year ended June 30, 2014. Included in salaries and related expenses for the year ended June 30, 
2016 is $12.2 million of stock compensation costs compared to $9.9 million and $10.3 million of stock compensation 
costs for fiscal years 2015 and 2014, respectively. The higher stock compensation costs in fiscal year 2016 compared to 
fiscal years 2015 and 2014 are driven by increases in the number of annual options granted due to increases in personnel, 
as well as higher stock prices in fiscal 2015. 

We are unable to accurately estimate which potential product candidates, if any, will eventually move into our 

internal preclinical research program. We are unable to reliably estimate the costs to develop these products as a result of 
the uncertainties related to discovery research efforts as well as preclinical and clinical testing. Our decision to move a 
product candidate into the clinical development phase is predicated upon the results of preclinical tests. We cannot 
accurately predict which, if any, of the discovery stage product candidates will advance from preclinical testing and 
move into our internal clinical development program. The clinical trial and regulatory approval processes for our product 
candidates that have advanced or that we intend to advance to clinical testing are lengthy, expensive and uncertain in 
both timing and outcome. As a result, the pace and timing of the clinical development of our product candidates is highly 
uncertain and may not ever result in approved products. Completion dates and development costs will vary significantly 
for each product candidate and are difficult to predict. A variety of factors, many of which are outside our control, could 
cause or contribute to the prevention or delay of the successful completion of our clinical trials, or delay or prevent our 
obtaining necessary regulatory approvals. The costs to take a product through clinical trials are dependent upon, among 
other factors, the clinical indications, the timing, size and design of each clinical trial, the number of patients enrolled in 
each trial, and the speed at which patients are enrolled and treated. Product candidates may be found to be ineffective or 
to cause unacceptable side effects during clinical trials, may take longer to progress through clinical trials than 
anticipated, may fail to receive necessary regulatory approvals or may prove impractical to manufacture in commercial 
quantities at reasonable cost or with acceptable quality. 

49 

The lengthy process of securing FDA approvals for new drugs requires the expenditure of substantial resources. 

Any failure by us to obtain, or any delay in obtaining, regulatory approvals, would materially adversely affect our 
product development efforts and our business overall. Accordingly, we cannot currently estimate, with any degree of 
certainty, the amount of time or money that we will be required to expend in the future on our product candidates prior to 
their regulatory approval, if such approval is ever granted. As a result of these uncertainties surrounding the timing and 
outcome of our clinical trials, we are currently unable to estimate when, if ever, our product candidates that have 
advanced into clinical testing will generate revenues and cash flows. 

We do not track our research and development costs by project. Since we use our research and development 

resources across multiple research and development projects, we manage our research and development expenses within 
each of the categories listed in the following table and described in more detail below (in thousands): 

Research and Development Expense 
Research . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $  24,754     $  20,729      $   30,793      
 34,562   
Preclinical and Clinical Testing . . . . . . . . . . . . . . . . . . .  
 8,296   
Process and Product Development . . . . . . . . . . . . . . . . .  
Manufacturing Operations . . . . . . . . . . . . . . . . . . . . . . .  
 33,307   
Total Research and Development Expense . . . . . . . . . .   $ 148,077   $ 111,768    $  106,958   

 42,546   
 8,468   
 40,025   

 68,855  
 12,535  
 41,933  

2014 

2016 

Year Ended June 30,  
2015 

Research—Research includes expenses associated with activities to evaluate new targets and to develop and 

evaluate new antibodies, linkers and cytotoxic agents for our products and in support of our collaborators. Such expenses 
primarily include personnel, fees to in-license certain technology, facilities and lab supplies. Research expenses 
increased $4.1 million to $24.8 million in fiscal year 2016 from fiscal year 2015 and decreased $10.1 million to 
$20.7 million in fiscal year 2015 from fiscal year 2014. The increase in fiscal year 2016 was principally due to increases 
in salaries and related expenses and facility-related expenses, as well as an increase in lab supplies driven by increased 
internal and partner activities. The decrease in fiscal year 2015 was principally due to a $12.8 million non-cash charge 
recorded for technology rights obtained under the collaboration agreement executed with CytomX in January 2014, 
partially offset by an increase in salaries and related expenses and an increase in facility-related expenses.  

Preclinical and Clinical Testing—Preclinical and clinical testing includes expenses related to preclinical testing 
of our own and, in certain instances, our collaborators’ product candidates, regulatory activities, and the cost of our own 
clinical trials. Such expenses include personnel, patient enrollment at our clinical testing sites, consultant fees, contract 
services, and facility expenses. Preclinical and clinical testing expenses increased $26.4 million to $68.9 million in fiscal 
year 2016 from fiscal year 2015 and increased $7.9 million to $42.5 million in fiscal year 2015 from fiscal year 2014. 
The increase in fiscal year 2016 was principally the result of (i) greater clinical trial costs incurred related to the 
expanded mirvetuximab soravtansine studies, as well as costs incurred related to the IMGN529 combo study and 
IMGN779 study which both initiated in the current year, partially offset by lower costs related to the IMGN289 study 
that was discontinued in fiscal 2015; (ii) increased contract service expense driven by increased activities to advance our 
internal programs, particularly mirvetuxmab soravtansine; and, (iii) an increase in salaries and related expenses. The 
increase in fiscal year 2015 was principally the result of an increase in contract service expense driven primarily by 
increased study activities related to mirvetuximab soravtansine and IMGN289, and to a lesser extent, higher salaries and 
related expenses and an increase in facility-related expenses. Partially offsetting these increases, clinical trial costs 
decreased marginally due primarily to decreased costs incurred related to the IMGN901 007 study, partially offset by 
increased costs related to the mirvetuximab soravtansine and IMGN529 studies during the current year.  

Process and Product Development—Process and product development expenses include costs for development 
of clinical and commercial manufacturing processes for our own and collaborator compounds. Such expenses include the 
costs of personnel, contract services and facility expenses. Total development expenses increased $4.0 to $12.5 million 
in fiscal year 2016 from fiscal year 2015 and expenses increased $172,000 to $8.5 million in fiscal year 2015 from fiscal 
year 2014. The increase in fiscal year 2016 was primarily the result of an increase in salaries and related expenses, as 
well as an increase in contract service expense driven primarily by IGN development activities. The increase in fiscal 
year 2015 was primarily the result of an increase in facility-related expenses. 

Manufacturing Operations—Manufacturing operations expense includes costs to manufacture preclinical and 
clinical materials for our own and our collaborators’ product candidates, quality control and quality assurance activities 
and costs to support the operation and maintenance of our conjugate manufacturing facility. Such expenses include 
personnel, raw materials for our and our collaborators’ preclinical studies and clinical trials, non-pivotal and pivotal 

50 

 
 
 
 
 
 
 
 
    
 
 
 
 
 
  
 
 
  
 
 
  
development costs with contract manufacturing organizations, manufacturing supplies, and facilities expense. 
Manufacturing operations expense increased $1.9 million to $41.9 million in fiscal year 2016 from fiscal year 2015 and 
increased $6.7 million to $40.0 million in fiscal year 2015 from fiscal year 2014. The increase in fiscal year 2016 was 
primarily the result of a decrease in costs capitalized into inventory due to a lesser number of manufactured batches of 
conjugated materials on behalf of our collaborators and an increase in salaries and related expenses. Partially offsetting 
these increases, costs of clinical materials revenue charged to research and development expense decreased due to timing 
of orders and release of such clinical materials from our partners and antibody development and supply expense 
decreased driven primarily by supply required in fiscal 2015 not needed in fiscal 2016 for our currently discontinued 
IMGN289 program. The increase in fiscal year 2015 was primarily the result of i) an increase in cost of clinical materials 
revenue charged to research and development expense due to timing of orders and release of such clinical materials from 
our partners; (ii) an increase in contract service expense driven by increased third-party conjugation activities to prepare 
for commercial-scale and increased cytotoxic agent activities; (iii) an increase in antibody development and supply 
expense driven primarily by commercial-ready activities for mirvetuximab soravtansine; and (iv) an increase in salaries 
and related expenses.  

Antibody development and supply expense in anticipation of potential future clinical trials, as well as our 
ongoing trials, was $8.6 million in fiscal year 2016, $8.8 million in fiscal year 2015, and $7.2 million in fiscal year 2014. 
The process of antibody production is lengthy due in part to the lead time to establish a satisfactory production process at 
a vendor. Accordingly, costs incurred related to antibody production and development have fluctuated from period to 
period and we expect these cost fluctuations to continue in the future. 

General and Administrative Expenses 

General and administrative expenses for the year ended June 30, 2016 increased $8.7 million to $36.9 million 
from $28.2 million for the year ended June 30, 2016. General and administrative expenses for the year ended June 30, 
2014 were $24.5 million. The increases in fiscal years 2016 and 2015 were primarily due to increases in salaries and 
related expenses, as well as increases in professional service fees. Contributing to the increase in salaries and related 
expenses for fiscal 2016 is a $3.1 million non-cash stock compensation charge related to the modification of certain 
outstanding common stock options with the former Chief Executive Officer’s succession plan. No similar charges were 
recorded in fiscal years 2015 and 2014.  

Investment Income, net 

Investment income for the years ended June 30, 2016, 2015 and 2014 was $325,000, $69,000 and $44,000, 

respectively. The increase in fiscal 2016 is due to a greater average cash balance during the period driven by the 
proceeds received in the fourth quarter of fiscal 2015 resulting from the sale of future royalties, which is further 
discussed below. 

Non-Cash Interest Expense on Liability Related to Sale of Future Royalty 

In April 2015, Immunity Royalty Holdings, L.P., or IRH, purchased our right to receive 100% of the royalty 

payments on commercial sales of Kadcyla arising under our development and commercialization license with 
Genentech, until IRH has received aggregate royalties equal to $235 million or $260 million, depending on when the 
aggregate royalties received by IRH reach a specified milestone. As described in Note F to our Consolidated Financial 
Statements, this royalty sale transaction has been recorded as a liability that amortizes over the estimated royalty 
payment period as Kadcyla royalties are remitted directly to the purchaser. We impute interest on the transaction and 
record interest expense at the effective interest rate, which we currently estimate to be approximately 9.6%. There are a 
number of factors that could materially affect the estimated interest rate, in particular, the amount and timing of royalty 
payments from future net sales of Kadcyla, and we will assess this estimate on a periodic basis. As a result, future 
interest rates could differ significantly and any such change in interest rate will be adjusted prospectively. 

Other (Expense) Income, net 

Other (expense) income, net for the years ended June 30, 2016, 2015 and 2014 was $(21,000), $(916,000) and 

$123,000, respectively. In fiscal 2016, we recorded $138,000 of interest expense related to convertible senior notes 
issued in June 2016, the details of which are discussed further below. No similar charges were recorded in fiscal years 
2015 and 2014. We incurred $96,000, $(910,000), and $120,000 in foreign currency exchange gains (losses) related to 
obligations with non-U.S. dollar-based suppliers and Euro cash balances maintained to fulfill them during the years 
ended June 30, 2016, 2015 and 2014, respectively. 

51 

Liquidity and Capital Resources 

Cash and cash equivalents  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      $ 245,026      $ 278,109
   256,370
Working capital . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
    35,104
Shareholders’ (deficit) equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   

   193,341   
   (82,304) 

As of June 30,  

2016 

2015 

(In thousands) 

Year Ended June 30,  

2016 

2015 

2014 

(In thousands) 

Cash used for operating activities  . . . . . . . . . . . . . . . . .     $ (124,476)     $  (55,291)    $ (53,650)
    (8,185)
Cash used for investing activities . . . . . . . . . . . . . . . . . .  
 9,136
Cash provided by financing activities . . . . . . . . . . . . . .  

 (7,425) 
   198,564   

 (10,376)  
 101,769  

Cash Flows 

We require cash to fund our operating expenses, including the advancement of our own clinical programs, and 
to make capital expenditures. Historically, we have funded our cash requirements primarily through equity financings in 
public markets and payments from our collaborators, including license fees, milestones, research funding, royalties and 
more recently, convertible debt. As of June 30, 2016, we had approximately $245 million in cash and cash equivalents. 
Net cash used for operating activities was $124.5 million, $55.3 million and $53.7 million during the years ended June 
30, 2016, 2015 and 2014, respectively. The principal use of cash in operating activities for all periods presented was to 
fund our net loss, adjusted for non-cash items. Cash used for operating activities in fiscal 2015 benefited from the 
$20 million upfront payment received from Takeda in March 2015 with the execution of a right- to-test agreement 
between the companies. 

Net cash used for investing activities was $10.4 million, $7.4 million and $8.2 million for the years ended June 
30, 2016, 2015 and 2015, respectively, and represent cash outflows from capital expenditures. Capital expenditures for 
the years ended June 30, 2016, 2015 and 2014 consisted primarily of leasehold improvements to the laboratory and 
office space at our corporate headquarters and manufacturing facility, laboratory equipment and computer software 
applications. 

Net cash provided by financing activities was $101.8 million, $198.6 million and $9.1 million for the years 
ended June 30, 2016, 2015 and 2014, respectively. In June 2016, we issued Convertible 4.5% Senior Notes with an 
aggregate principal amount of $100 million. We received net proceeds of approximately $96.6 million from the sale of 
the Convertible Notes after deducting fees and expenses of approximately $3.4 million. See Note E to our Consolidated 
Financial Statements for further details regarding the terms of the transaction. 

As discussed above, in April 2015, Immunity Royalty Holdings, L.P. purchased our right to receive 100% of 
the royalty payments on commercial sales of Kadcyla. At consummation of the transaction in April 2015, we received 
gross cash proceeds of $200 million. We recorded these cash proceeds as a deferred royalty obligation liability which is 
being amortized over the expected royalty recovery period. As part of this transaction, the Company incurred 
approximately $5.9 million in transaction costs. 

Net cash provided by financing activities for the years ended June 30, 2016, 2015 and 2014 include the 

proceeds from the exercise of approximately 555,000, 651,000 and 1.1 million stock options, respectively. 

We anticipate that our current capital resources and expected future collaborator payments under existing 
collaborations will enable us to meet our operational expenses and capital expenditures roughly through December 2017. 
However, we cannot provide assurance that such collaborative agreement funding will, in fact, be received. Should we or 
our partners not meet some or all of the terms and conditions of our various collaboration agreements, we may be 
required to pursue additional strategic partners, secure alternative financing arrangements, and/or defer or limit some or 
all of our research, development and/or clinical projects. 

52 

 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
  
Contractual Obligations 

Below is a table that presents our contractual obligations and commercial commitments as of June 30, 2016 (in 

thousands): 

Less than  
  One Year  

Payments Due by Period 
1-3 
Years 

4-5 
Years 

  More than  

Total 

5 Years 
Waltham lease obligations(1). . . .      $  69,767     $  6,792     $ 14,167     $  14,556      $ 34,252
Other operating lease 
obligations(1)  . . . . . . . . . . . . . . . .   
Liability related to the sale of 
future royalties(2) . . . . . . . . . . . . .   
   55,531
Convertible 4.5% senior notes(3)   
 —
Total . . . . . . . . . . . . . . . . . . . . . . .    $ 365,396   $ 23,040   $ 66,906   $ 185,667    $ 89,783

   193,372  
 100,000  

   51,592  
 —  

   15,138  
 —  

 71,111   
 100,000   

 1,110  

 1,147  

 2,257  

 —   

 —

(1)  Lease agreements were signed in July 2007, November 2010 and April 2013, and amended in December 2013 and 
April 2014. In December 2014, we entered into a sublease for 7,507 square feet of office space at 100 River Ridge 
Drive, Norwood, MA through July 2018. We will receive approximately $250,000 in minimum rental payments 
over the remaining term of the sublease, which is not included in the table above. 

(2)  See Note F to the Consolidated Financial Statements in Item 8 for discussion of this liability. 

(3)  See Note E to the Consolidated Financial Statements in Item 8 for discussion of the convertible senior notes. 

In addition to the above table, we are contractually obligated to make future success-based development, 
regulatory or sales milestone payments in conjunction with certain collaborative agreements. These payments are 
contingent upon the occurrence of certain future events and, given the nature of these events, it is unclear when, if ever, 
we may be required to pay such amounts. Therefore, the timing of any future payment is not reasonably estimable. As a 
result, these contingent payments have not been included in the table above or recorded in our consolidated financial 
statements. As of June 30, 2016, the maximum amount that may be payable in the future under our current collaborative 
agreements is $162 million, $1.4 million of which is reimbursable by a third party under a separate agreement. 

In addition, we are party to a license agreement covering the manufacture of the antibodies used in certain of 

our product candidates which, under certain circumstances, requires periodic payments once the product reaches a 
specified stage of clinical development, and royalties on commercial sales of the product. We believe that the license 
agreement, by its terms, does not obligate us to make any further payments thereunder and accordingly, we have not 
accrued a potential payment of £300,000 for one of our product candidates that has reached this stage. 

Change in fiscal year  

On June 15, 2016 the company’s Board of Directors approved a change in our fiscal year from a fiscal year 
ending on the last day of June of each year to a calendar fiscal year ending on the last day of December of each year, 
effective January 1, 2017. Accordingly we will be issuing six month transitional financial statements as of December 31, 
2016, and calendar year financial statements thereafter. 

Recent Accounting Pronouncements 

In May 2014, the FASB issued ASU 2014-9, Revenue from Contracts with Customers (Topic 606), to clarify 

the principles for recognizing revenue. This update provides a comprehensive new revenue recognition model that 
requires revenue to be recognized in a manner to depict the transfer of goods or services to a customer at an amount that 
reflects the consideration expected to be received in exchange for those goods or services. In August 2015, the FASB 
issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, which 
delayed the effective date of the new standard from January 1, 2017 to January 1, 2018. The FASB also agreed to allow 
entities to choose to adopt the standard as of the original effective date. In March 2016, the FASB issued ASU No. 2016-
08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations, which clarifies the 
implementation guidance on principal versus agent considerations. In April 2016, the FASB issued ASU No. 2016-10, 
Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing, which 
clarifies certain aspects of identifying performance obligations and licensing implementation guidance. In May 2016, the 

53 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
FASB issued ASU No. 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements 
and Practical Expedients related to disclosures of remaining performance obligations, as well as other amendments to 
guidance on collectibility, non-cash consideration and the presentation of sales and other similar taxes collected from 
customers. These standards have the same effective date and transition date of January 1, 2018. The new revenue 
standard allows for either full retrospective or modified retrospective application. We are currently evaluating the timing 
of its adoption, the transition method to apply and the impact that this guidance will have on our financial statements and 
related disclosures. 

In August 2014, the FASB issued ASU 2014-15, Presentation of Financial Statements-Going Concern 

(Subtopic 205-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern. This new 
standard gives a company’s management the final responsibilities to decide whether there’s substantial doubt about the 
company’s ability to continue as a going concern and to provide related footnote disclosures. The standard provides 
guidance to management, with principles and definitions that are intended to reduce diversity in the timing and content 
of disclosures that companies commonly provide in their footnotes. Under the new standard, management must decide 
whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the company’s 
ability to continue as a going concern within one year after the date that the financial statements are issued, or within one 
year after the date that the financial statements are available to be issued when applicable. This guidance is effective for 
annual reporting beginning after December 15, 2016, including interim periods within the year of adoption, with early 
application permitted. Accordingly, the standard is effective for us on January 1, 2017. We have not yet completed our 
analysis of the impact of the adoption of this guidance. Refer to Note A, Nature of Business and Plan of Operations, of 
our consolidated financial statements for further discussion.  

In April 2015, the FASB issued ASU 2015-03, Interest-Imputation of Interest (Subtopic 835-30): Simplifying 

the Presentation of Debt Issuance Costs. To simplify presentation of debt issuance costs, this new standard requires that 
debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the 
carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for 
debt issuance costs are not affected by this update. This guidance is effective for annual reporting beginning after 
December 15, 2015, including interim periods within the year of adoption, and calls for retrospective application, with 
early application permitted. Accordingly, the standard is effective for us on July 1, 2016. Our consolidated balance sheet 
as of June 30, 2016 includes in assets $7.8 million of debt issuance costs classified as deferred financing costs. 

In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes (Topic 
740). To simplify the presentation of deferred income taxes, the amendments in this Update require that deferred tax 
liabilities and assets be classified as noncurrent in a classified statement of financial position. This guidance is effective 
for annual reporting beginning after December 15, 2016, including interim periods within the year of adoption, with 
early application permitted. We implemented the recommendations of this Update prospectively in the second quarter of 
fiscal year 2016, resulting in a reduction of long-term assets and current liabilities of approximately $843,000 as of 
December 31, 2015. The prior period balances were not retrospectively adjusted. 

In January 2016, the FASB issued ASU 2016-1, Recognition and Measurement of Financial Assets and 

Financial Liabilities (Topic 825). The amendments in this Update supersede the guidance to classify equity securities 
with readily determinable fair values into different categories (that is, trading or available-for-sale) and require equity 
securities (including other ownership interests, such as partnerships, unincorporated joint ventures, and limited liability 
companies) to be measured at fair value with changes in the fair value recognized through net income. The amendments 
allow equity investments that do not have readily determinable fair values to be remeasured at fair value either upon the 
occurrence of an observable price change or upon identification of an impairment. The amendments also require 
enhanced disclosures about those investments. The amendments improve financial reporting by providing relevant 
information about an entity’s equity investments and reducing the number of items that are recognized in other 
comprehensive income. This guidance is effective for annual reporting beginning after December 15, 2017, including 
interim periods within the year of adoption, and calls for prospective application, with early application permitted. 
Accordingly, the standard is effective for us on January 1, 2018. The adoption of this guidance is not expected to have a 
material impact on our consolidated financial statements. 

In February 2016, the FASB issued ASU 2016-2, Leases (Topic 842) that primarily requires lessees to 

recognize most leases on their balance sheets but record expenses on their income statements in a manner similar to 
current accounting. For lessors, the guidance modifies the classification criteria and the accounting for sales-type and 
direct financing leases. The guidance is effective for fiscal years beginning after December 15, 2018, including interim 

54 

 
 
 
 
periods within those fiscal years, and calls for retrospective application, with early adoption permitted. Accordingly, the 
standard is effective for us on January 1, 2019. We are currently evaluating the impact of this guidance on our financial 
statements and the timing of adoption. 

In March 2016, the FASB issued ASU 2016-9, Improvements to Employee Share-Based Payment Accounting 

(Topic 718) that changes the accounting for certain aspects of share-based payments to employees. The guidance 
requires the recognition of the income tax effects of awards in the income statement when the awards vest or are settled, 
thus eliminating additional paid in capital pools. The guidance also allows for the employer to repurchase more of an 
employee’s shares for tax withholding purposes without triggering liability accounting. In addition, the guidance allows 
for a policy election to account for forfeitures as they occur rather than on an estimated basis. The guidance is effective 
for annual periods beginning after December 15, 2016, and interim periods within those annual periods with early 
adoption permitted. Accordingly, the standard is effective for us on January 1, 2017. We are currently evaluating the 
impact of this guidance on our financial statements and the timing of adoption.   

Off-Balance Sheet Arrangements 

None. 

Item 7A.  Quantitative and Qualitative Disclosure About Market Risk 

We maintain an investment portfolio in accordance with our investment policy. The primary objectives of our 

investment policy are to preserve principal, maintain proper liquidity to meet operating needs and maximize yields. 
Although our investments are subject to credit risk, our investment policy specifies credit quality standards for our 
investments and limits the amount of credit exposure from any single issue, issuer or type of investment. Our 
investments are also subject to interest rate risk and will decrease in value if market interest rates increase. However, due 
to the conservative nature of our investments and relatively short duration, interest rate risk is mitigated. We do not 
currently own derivative financial instruments in our investment portfolio. Accordingly, we do not believe there is any 
material market risk exposure with respect to derivative or other financial instruments that would require disclosure 
under this item. 

Our foreign currency hedging program uses either forward contracts or a Euro-denominated bank account to 
manage the foreign currency exposures that exist as part of our ongoing business operations. Our foreign currency risk 
management strategy is principally designed to mitigate the future potential financial impact of changes in the value of 
transactions, anticipated transactions and balances denominated in foreign currency, resulting from changes in foreign 
currency exchange rates. Our market risks associated with changes in foreign currency exchange rates are currently 
limited to a Euro-denominated bank account as we have no forward contracts at June 30, 2016. 

55 

 
 
 
 
 
Item 8.  Financial Statements and Supplementary Data 

IMMUNOGEN, INC. 

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS 

Report of Independent Registered Public Accounting Firm  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Consolidated Financial Statements: 

Page 
57

Consolidated Balance Sheets as of June 30, 2016 and 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Consolidated Statements of Operations and Comprehensive Loss for the Years Ended June 30, 2016, 2015, 

and 2014  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Consolidated Statements of Shareholders’ (Deficit) Equity for the Years Ended June 30, 2016, 2015, and 2014 
Consolidated Statements of Cash Flows for the Years Ended June 30, 2016, 2015, and 2014 . . . . . . . . . . . . . . . .  
Notes to Consolidated Financial Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  

58

59
60
61
62

56 

 
 
 
 
 
Report of Independent Registered Public Accounting Firm 

The Board of Directors and Shareholders of ImmunoGen, Inc. 

We have audited the accompanying consolidated balance sheets of ImmunoGen, Inc. as of June 30, 2016 and 
2015, and the related consolidated statements of operations and comprehensive loss, shareholders’ (deficit) equity and 
cash flows for each of the three years in the period ended June 30, 2016. These financial statements are the responsibility 
of the Company’s management. Our responsibility is to express an opinion on these financial statements based on our 
audits. 

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board 
(United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether 
the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence 
supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting 
principles used and significant estimates made by management, as well as evaluating the overall financial statement 
presentation. We believe that our audits provide a reasonable basis for our opinion. 

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated 

financial position of ImmunoGen, Inc. at June 30, 2016 and 2015, and the consolidated results of its operations and its 
cash flows for each of the three years in the period ended June 30, 2016, in conformity with U.S. generally accepted 
accounting principles. 

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board 

(United States), ImmunoGen, Inc.’s internal control over financial reporting as of June 30, 2016, based on criteria 
established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the 
Treadway Commission (2013 framework) and our report dated August 25, 2016 expressed an unqualified opinion 
thereon. 

/s/ Ernst & Young LLP 

Boston, Massachusetts 
August 25, 2016 

57 

 
 
IMMUNOGEN, INC. 

CONSOLIDATED BALANCE SHEETS 

In thousands, except per share amounts 

June 30,  
2016 

June 30,  
2015 

ASSETS 

Cash and cash equivalents  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     $   245,026    $  278,109
 5,088
Accounts receivable  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 714
Unbilled revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 2,935
Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 1,159
Current portion of deferred financing costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 4,175
Prepaid and other current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 292,180
Total current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 16,254
Property and equipment, net of accumulated depreciation . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 4,415
Deferred financing costs, net of current portion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 974
Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     $   287,085    $  313,823

 883   
 1,409   
 907   
 1,674   
 4,881   
    254,780   
 22,704   
 6,171   
 3,430   

LIABILITIES AND SHAREHOLDERS’ (DEFICIT) EQUITY 

Accounts payable  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     $ 
Accrued compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Other accrued liabilities  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Current portion of deferred lease incentive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Current portion of liability related to the sale of future royalties . . . . . . . . . . . . . . . . . . . . . .    
Current portion of deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Total current liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Deferred lease incentive, net of current portion  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Deferred revenue, net of current portion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Convertible 4.5% senior notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Liability related to the sale of future royalties, net of current portion . . . . . . . . . . . . . . . . . .    
Other long-term liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Total liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    

 11,510    $
 10,724   
 9,713   
 772   
 15,138   
 13,582   
 61,439   
 6,236   
 19,288   
 100,000   
 178,234   
 4,192   
    369,389   

 8,138
 8,346
 10,441
 646
 7,906
 333
 35,810
 6,301
 40,855
 —
 191,756
 3,997
 278,719

Commitments and contingencies (Note I) 
Shareholders’ (deficit) equity: 
Preferred stock, $.01 par value; authorized 5,000 shares; no shares issued and outstanding   
Common stock, $0.01 par value; authorized 150,000 shares; issued and outstanding 
87,209 and 86,579 shares as of June 30, 2016 and June 30, 2015, respectively . . . . . . . . . .    
Additional paid-in capital . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Accumulated deficit  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Total shareholders’ (deficit) equity  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    

 866
 743,108
   (708,870)
 35,104
Total liabilities and shareholders’ (deficit) equity  . . . . . . . . . . . . . . . . . . . . . . . . . . . .     $   287,085    $  313,823

 872   
    770,511   
    (853,687) 
 (82,304) 

 —   

 —

The accompanying notes are an integral part of the consolidated financial statements. 

58 

 
 
 
 
 
     
    
 
 
 
 
 
 
   
 
   
  
 
  
 
  
 
 
 
  
 
 
  
 
 
 
  
 
 
   
 
   
  
 
  
 
  
 
 
 
  
 
  
 
  
 
  
 
 
 
 
 
  
 
 
 
   
 
   
 
   
 
   
  
 
  
 
 
  
 
 
 
IMMUNOGEN, INC. 

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS 

In thousands, except per share amounts 

Revenues: 

Year Ended June 30,  

2016 

2015 

2014 

License and milestone fees  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $  26,915    $   57,815    $  39,455
 10,346
Royalty revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 —
Non-cash royalty revenue related to the sale of future royalties . . . . . . . . . . . . .    
 7,187
Research and development support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 2,908
Clinical materials revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 59,896
Total revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    

 13,867   
 5,484   
 2,848   
 5,527   
 85,541   

 195   
 25,299   
 4,014   
 3,579   
 60,002   

Operating Expenses: 

Research and development  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
General and administrative  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Total operating expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    

 148,077   
 36,916   
 184,993   
Loss from operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      (124,991) 
Investment income, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 325   
Non-cash interest expense on liability related to the sale of future royalties and 
 —
convertible senior notes  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Other (expense) income, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 123
Net loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $ (144,817)  $  (60,739)  $  (71,364)
 (0.83)
Basic and diluted net loss per common share . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $
 85,481
Basic and diluted weighted average common shares outstanding . . . . . . . . . . . . . .    
Total comprehensive loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $ (144,817)  $  (60,739)  $  (71,364)

   111,768   
 28,228   
   139,996   
    (54,455) 
 69   

   106,958
 24,469
   131,427
   (71,531)
 44

 (20,130) 
 (21) 

 (5,437) 
 (916) 

(1.67)  $ 

 (0.71)  $

 86,976   

 86,038   

The accompanying notes are an integral part of the consolidated financial statements. 

59 

 
 
 
 
 
 
 
 
 
       
           
          
  
 
 
 
  
 
  
 
  
 
 
 
   
 
   
  
 
  
 
 
 
  
 
  
 
 
 
CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ (DEFICIT) EQUITY 

IMMUNOGEN, INC. 

In thousands 

  Additional  

Common Stock 
Shares    Amount 

Paid-In 
Capital 

  Accumulated  

Deficit 

Total 
Shareholders’  
(Deficit) Equity 

 —  
 11  
 —  
1  
 —  

 —  
 1,134  
 —  
 44  
 —  

 —  
 9,125  
 15,647  
 (1) 
 433  

    (71,364) 
 —  
 —  
 —  
 —  

Balance at June 30, 2013  . . . . . . . . . . . . . . . . . . . . . . . . .       84,725     $  847    $ 697,767     $ (576,767)    $
Net loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Stock options exercised . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Stock option and restricted stock compensation expense    
Directors’ deferred share units converted . . . . . . . . . . . .    
Directors’ deferred share unit compensation . . . . . . . . . .    
Balance at June 30, 2014  . . . . . . . . . . . . . . . . . . . . . . . . .      85,903   $  859   $ 722,971   $ (648,131)  $
Net loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Stock options exercised . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Restricted stock award  . . . . . . . . . . . . . . . . . . . . . . . . . . .   
Stock option and restricted stock compensation expense    
Directors’ deferred share unit compensation . . . . . . . . . .    
Balance at June 30, 2015  . . . . . . . . . . . . . . . . . . . . . . . . .      86,579   $  866   $ 743,108   $ (708,870)  $
Net loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Stock options exercised . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Restricted stock award  . . . . . . . . . . . . . . . . . . . . . . . . . . .   
Stock option and restricted stock compensation expense    
Directors’ deferred share unit compensation . . . . . . . . . .    
Balance at June 30, 2016  . . . . . . . . . . . . . . . . . . . . . . . . .      87,209   $  872   $ 770,511   $ (853,687)  $

   (144,817) 
 —  
 —  
 —  
 —  

    (60,739) 
 —  
 —  
 —  
 —  

 —  
 5,156  
 (1) 
 21,868  
 380  

 —  
 4,422  
 —  
 15,326  
 389  

 —  
 555  
 75  
 —  
 —  

 —  
 651  
 25  
 —  
 —  

 —  
 5  
 1  
 —  
 —  

 —  
 7  
 —  
 —  
 —  

 121,847
 (71,364)
 9,136
 15,647
 —
 433
 75,699
 (60,739)
 4,429
 —
 15,326
 389
 35,104
 (144,817)
 5,161
 —
 21,868
 380
 (82,304)

The accompanying notes are an integral part of the consolidated financial statements. 

60 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
  
  
 
 
  
  
 
 
  
  
 
 
  
  
 
 
  
 
 
  
  
 
 
 
 
 
 
  
  
 
 
  
  
 
 
  
 
 
  
  
 
 
 
 
 
 
  
  
 
 
  
  
 
 
IMMUNOGEN, INC. 

CONSOLIDATED STATEMENTS OF CASH FLOWS 

In thousands 

Year Ended June 30,  

2016 

2015 

2014 

Cash flows from operating activities: 
Net loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $ (144,817)  $  (60,739)  $  (71,364)
Adjustments to reconcile net loss to net cash used for operating activities: 

Non-cash royalty revenue related to sale of future royalties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Non-cash interest expense on liability related to sale of future royalties and convertible senior notes 
Depreciation and amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
(Gain) Loss on sale/disposal of fixed assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Gain on forward contracts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Non-cash licensing fee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Stock and deferred share unit compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Deferred rent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Change in operating assets and liabilities: 

 (25,299) 
 20,130   
 5,327   
 (21) 
 —   
 —   
 22,248   
 161   

 (5,484) 
 5,437  
 5,513  
 7  
 —  
 —  
 15,715  
 195  

 —
 —
 4,598
 20
 (2)
 12,830
 16,080
 297

Accounts receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Unbilled revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Prepaid and other current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Restricted cash  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Accounts payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Accrued compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Other accrued liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Deferred revenue, net of non-cash upfront license payment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Proceeds from landlord for tenant improvements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Net cash used for operating activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  

 4,205   
 (695) 
 2,028   
 (706) 
 —   
 (2,456) 
 2,649   
 2,378   
 (1,434) 
 (8,318) 
 144   
   (124,476) 

 (3,192) 
 615  
 15  
 (1,855) 
 —  
 (761) 
 3,319  
 1,481  
 3,248  
   (20,155) 
 1,350  
   (55,291) 

 (1,896)
 792
 (2,247)
 571
 2,231
 4
 321
 712
 (394)
   (16,675)
 472
   (53,650)

Cash flows from investing activities: 

Purchases of property and equipment, net  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Payments from settlement of forward contracts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Net cash used for investing activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  

    (10,376) 
 —   
    (10,376) 

 (7,425) 
 —  
 (7,425) 

 (8,184)
 (1)
 (8,185)

Cash flows from financing activities: 

 9,136
Proceeds from stock options exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
 —
Proceeds from sale of future royalties, net of $5,865 of transaction costs . . . . . . . . . . . . . . . . . . . . .  
 —
Proceeds from issuance of convertible 4.5% notes, net of $3,392 of transaction costs . . . . . . . . . . .  
 9,136
Net cash provided by financing activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
   (52,699)
Net change in cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Cash and cash equivalents, beginning of period  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
   194,960
Cash and cash equivalents, end of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $  245,026    $ 278,109   $ 142,261

 5,161   
 —   
 96,608   
    101,769   
    (33,083) 
    278,109   

 4,429  
 194,135  
 —  
   198,564  
   135,848  
   142,261  

The accompanying notes are an integral part of the consolidated financial statements. 

61 

 
 
 
 
 
 
 
 
  
 
 
 
           
          
          
 
 
 
 
 
   
 
 
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
 
 
 
 
 
   
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
  
 
 
 
   
 
 
 
   
 
 
  
 
 
 
 
 
   
 
 
 
   
  
 
 
 
 
  
 
 
 
 
 
IMMUNOGEN, INC. 

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 

AS OF JUNE 30, 2016 

A.       Nature of Business and Plan of Operations 

ImmunoGen, Inc. (the Company) was incorporated in Massachusetts in 1981 and is focused on the development 

of antibody-based anticancer therapeutics. The Company has incurred operating losses and negative cash flows from 
operations since inception, incurred a net loss of approximately $144.8 million during the fiscal year ended June 30, 
2016, and has an accumulated deficit of approximately $853.7 million as of June 30, 2016. The Company has primarily 
funded these losses through payments received from its collaborations and equity and convertible debt financings. To 
date, the Company has no product revenue and management expects operating losses to continue for the foreseeable 
future. 

At June 30, 2016, the Company had $245 million of cash and cash equivalents on hand. The Company 
anticipates that its current capital resources and expected future collaborator payments under existing collaborations will 
enable it to meet its operational expenses and capital expenditures through approximately December 2017. The 
Company may raise additional funds through equity or debt financings or generate revenues from collaborative partners 
through a combination of upfront license payments, milestone payments, royalty payments, research funding, and 
clinical material reimbursement. There can be no assurance that the Company will be able to obtain additional debt or 
equity financing or generate revenues from collaborative partners on terms acceptable to the Company or at all. The 
failure of the Company to obtain sufficient funds on acceptable terms when needed could have a material adverse effect 
on the Company’s business, results of operations and financial condition and require the Company to defer or limit some 
or all of its research, development and/or clinical projects. 

The Company is subject to risks common to companies in the biotechnology industry including, but not limited 

to, the development by its competitors of new technological innovations, dependence on key personnel, protection of 
proprietary technology, manufacturing and marketing limitations, collaboration arrangements, third-party 
reimbursements and compliance with governmental regulations. 

On June 15, 2016 the company’s Board of Directors approved a change in the Company’s fiscal year from a 
fiscal year ending on the last day of June of each year to a calendar fiscal year ending on the last day of December of 
each year, effective January 1, 2017. Accordingly the Company will be issuing six month transitional financial 
statements as of December 31, 2016, and calendar year financial statements thereafter. 

B.       Summary of Significant Accounting Policies 

Principles of Consolidation 

The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries, 

ImmunoGen Securities Corp., ImmunoGen Europe Limited and Hurricane, LLC. All intercompany transactions and 
balances have been eliminated. 

Use of Estimates 

The preparation of financial statements in conformity with accounting principles generally accepted in the 

United States (U.S.) requires management to make estimates and assumptions that affect the reported amounts of assets 
and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported 
amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. 

Subsequent Events 

The Company has evaluated all events or transactions that occurred after June 30, 2016 up through the date the 

Company issued these financial statements. The Company did not have any material recognizable or unrecognizable 
subsequent events. 

62 

 
 
 
Related party transaction 

During fiscal year 2016, the Company entered into a transaction with Sanofi to purchase drug product along 

with the master and working cell banks for a product that Sanofi previously discontinued and had returned its rights back 
to the Company. The Company entered into this transaction, at a cost of €1.6 million, in order to continue development 
of the product, or make it more attractive to re-license the target to another partner. A relationship between an executive 
from the Company and an executive from Sanofi qualified this transaction as potentially between related parties, and 
accordingly, the audit committee of the Board of Directors of the Company approved the terms and conditions of the 
transaction, believing that it was in the best interest of the Company to proceed and that it was done at an arms-length 
amount. The transaction was substantially completed during the year; however, as of June 30, 2016, $44,000 is classified 
as a prepaid expense and approximately $258,000 more will be payable when a deliverable still pending from Sanofi is 
received. 

Revenue Recognition 

The Company enters into licensing and development agreements with collaborative partners for the 
development of monoclonal antibody-based anticancer therapeutics. The terms of these agreements contain multiple 
deliverables which may include (i) licenses, or options to obtain licenses, to the Company’s antibody-drug conjugate, or 
ADC, technology, (ii) rights to future technological improvements, (iii) research activities to be performed on behalf of 
the collaborative partner, (iv) delivery of cytotoxic agents and (v) the manufacture of preclinical or clinical materials for 
the collaborative partner. Payments to the Company under these agreements may include upfront fees, option fees, 
exercise fees, payments for research activities, payments for the manufacture of preclinical or clinical materials, 
payments based upon the achievement of certain milestones and royalties on product sales. The Company follows the 
provisions of the Financial Accounting Standards Board, or FASB, Accounting Standards Codification, or ASC, Topic 
605-25, “Revenue Recognition—Multiple-Element Arrangements,” and ASC Topic 605-28, “Revenue Recognition—
Milestone Method,” in accounting for these agreements. In order to account for these agreements, the Company must 
identify the deliverables included within the agreement and evaluate which deliverables represent separate units of 
accounting based on whether certain criteria are met, including whether the delivered element has stand-alone value to 
the collaborator. The consideration received is allocated among the separate units of accounting, and the applicable 
revenue recognition criteria are applied to each of the separate units. 

At June 30, 2016, the Company had the following two types of agreements with the parties identified below: 

•  Development and commercialization licenses, which provide the party with the right to use the Company’s 
ADC technology and/or certain other intellectual property to develop compounds to a specified antigen 
target: 

Amgen (two exclusive single-target licenses(1))  

Bayer (one exclusive single-target license) 

Biotest (one exclusive single-target license) 

CytomX (one exclusive single-target license) 

Lilly (three exclusive single-target licenses) 

Novartis (five exclusive single-target licenses and one license to two related targets: one target on an 
exclusive basis and the second target on a non-exclusive basis) 

Roche, through its Genentech unit (five exclusive single-target licenses) 

Sanofi (one exclusive single-target license and one exclusive license to multiple individual targets) 

Takeda, through its wholly owned subsidiary, Millennium Pharmaceuticals, Inc. (one exclusive single-
target license) 

(1)  Amgen has sublicensed one of its exclusive single-target licenses to Oxford BioTherapeutics Ltd. 

63 

•  Research license/option agreement for a defined period of time to secure development and 

commercialization licenses to use the Company’s ADC technology to develop anticancer compounds to 
specified targets on established terms (referred to herein as right-to-test agreements): 

CytomX 

Takeda, through its wholly owned subsidiary, Millennium Pharmaceuticals, Inc.   

There are no performance, cancellation, termination or refund provisions in any of the arrangements that 

contain material financial consequences to the Company. 

Development and Commercialization Licenses 

The deliverables under a development and commercialization license agreement generally include the license to 

the Company’s ADC technology with respect to a specified antigen target, and may also include deliverables related to 
rights to future technological improvements, research activities to be performed on behalf of the collaborative partner 
and the manufacture of preclinical or clinical materials for the collaborative partner. 

Generally, development and commercialization licenses contain non-refundable terms for payments and, 
depending on the terms of the agreement, provide that the Company will (i) at the collaborator’s request, provide 
research services at negotiated prices which are generally consistent with what other third parties would charge, (ii) at 
the collaborator’s request, manufacture and provide to it preclinical and clinical materials or deliver cytotoxic agents at 
negotiated prices which are generally consistent with what other third parties would charge, (iii) earn payments upon the 
achievement of certain milestones and (iv) earn royalty payments, generally until the later of the last applicable patent 
expiration or 10 to 12 years after product launch. In the case of Kadcyla, however, the minimum royalty term is 10 years 
and the maximum royalty term is 12 years on a country-by-country basis, regardless of patent protection. Royalty rates 
may vary over the royalty term depending on the Company’s intellectual property rights and/or the presence of 
comparable competing products. The Company may provide technical assistance and share any technology 
improvements with its collaborators during the term of the collaboration agreements. The Company does not directly 
control when or whether any collaborator will request research or manufacturing services, achieve milestones or become 
liable for royalty payments. As a result, the Company cannot predict when or if it will recognize revenues in connection 
with any of the foregoing. 

In determining the units of accounting, management evaluates whether the license has stand-alone value from 
the undelivered elements to the collaborative partner based on the consideration of the relevant facts and circumstances 
for each arrangement. Factors considered in this determination include the research capabilities of the partner and the 
availability of ADC technology research expertise in the general marketplace. If the Company concludes that the license 
has stand-alone value and therefore will be accounted for as a separate unit of accounting, the Company then determines 
the estimated selling prices of the license and all other units of accounting based on market conditions, similar 
arrangements entered into by third parties, and entity-specific factors such as the terms of the Company’s previous 
collaborative agreements, recent preclinical and clinical testing results of therapeutic products that use the Company’s 
ADC technology, the Company’s pricing practices and pricing objectives, the likelihood that technological 
improvements will be made, and, if made, will be used by the Company’s collaborators and the nature of the research 
services to be performed on behalf of its collaborators and market rates for similar services. 

Upfront payments on development and commercialization licenses may be recognized upon delivery of the 
license if facts and circumstances dictate that the license has stand-alone value from the undelivered elements, which 
generally include rights to future technological improvements, research services, delivery of cytotoxic agents and the 
manufacture of preclinical and clinical materials. 

The Company recognizes revenue related to research services that represent separate units of accounting as they 
are performed, as long as there is persuasive evidence of an arrangement, the fee is fixed or determinable, and collection 
of the related receivable is probable. The Company recognizes revenue related to the rights to future technological 
improvements over the estimated term of the applicable license. 

The Company may also provide cytotoxic agents to its collaborators or produce preclinical and clinical 
materials at negotiated prices which are generally consistent with what other third parties would charge. The Company 

64 

 
recognizes revenue on cytotoxic agents and on preclinical and clinical materials when the materials have passed all 
quality testing required for collaborator acceptance and title and risk of loss have transferred to the collaborator. 
Arrangement consideration allocated to the manufacture of preclinical and clinical materials in a multiple-deliverable 
arrangement is below the Company’s full cost, and the Company’s full cost is not expected to ever be below its contract 
selling prices for its existing collaborations. During the fiscal years ended June 30, 2016, 2015 and 2014, the difference 
between the Company’s full cost to manufacture preclinical and clinical materials on behalf of its collaborators as 
compared to total amounts received from collaborators for the manufacture of preclinical and clinical materials was 
$6.9 million, $9.2 million and $2.3 million, respectively. The majority of the Company’s costs to produce these 
preclinical and clinical materials are fixed and then allocated to each batch based on the number of batches produced 
during the period. Therefore, the Company’s costs to produce these materials are significantly impacted by the number 
of batches produced during the period. The volume of preclinical and clinical materials the Company produces is 
directly related to the number of clinical trials the Company and its collaborators are preparing for or currently have 
underway, the speed of enrollment in those trials, the dosage schedule of each clinical trial and the time period such 
trials last. Accordingly, the volume of preclinical and clinical materials produced, and therefore the Company’s 
per-batch costs to manufacture these preclinical and clinical materials, may vary significantly from period to period. 

The Company may also produce research material for potential collaborators under material transfer 

agreements. Additionally, the Company performs research activities, including developing antibody specific conjugation 
processes, on behalf of its collaborators and potential collaborators during the early evaluation and preclinical testing 
stages of drug development. The Company records amounts received for research materials produced or services 
performed as a component of research and development support revenue. The Company also develops conjugation 
processes for materials for later stage testing and commercialization for certain collaborators. The Company is 
compensated at negotiated rates and may receive milestone payments for developing these processes which are recorded 
as a component of research and development support revenue. 

The Company’s development and commercialization license agreements have milestone payments which for 

reporting purposes are aggregated into three categories: (i) development milestones, (ii) regulatory milestones, and 
(iii) sales milestones. Development milestones are typically payable when a product candidate initiates or advances into 
different clinical trial phases. Regulatory milestones are typically payable upon submission for marketing approval with 
the U.S. Food and Drug Administration, or FDA, or other countries’ regulatory authorities or on receipt of actual 
marketing approvals for the compound or for additional indications. Sales milestones are typically payable when annual 
sales reach certain levels. 

At the inception of each agreement that includes milestone payments, the Company evaluates whether each 

milestone is substantive and at risk to both parties on the basis of the contingent nature of the milestone. This evaluation 
includes an assessment of whether (a) the consideration is commensurate with either (1) the entity’s performance to 
achieve the milestone, or (2) the enhancement of the value of the delivered item(s) as a result of a specific outcome 
resulting from the entity’s performance to achieve the milestone, (b) the consideration relates solely to past performance 
and (c) the consideration is reasonable relative to all of the deliverables and payment terms within the arrangement. The 
Company evaluates factors such as the scientific, regulatory, commercial and other risks that must be overcome to 
achieve the respective milestone, the level of effort and investment required to achieve the respective milestone and 
whether the milestone consideration is reasonable relative to all deliverables and payment terms in the arrangement in 
making this assessment. 

Non-refundable development and regulatory milestones that are expected to be achieved as a result of the 

Company’s efforts during the period of substantial involvement are considered substantive and are recognized as 
revenue upon the achievement of the milestone, assuming all other revenue recognition criteria are met. Milestones that 
are not considered substantive because we do not contribute effort to the achievement of such milestones are generally 
achieved after the period of substantial involvement and are recognized as revenue upon achievement of the milestone, 
as there are no undelivered elements remaining and no continuing performance obligations, assuming all other revenue 
recognition criteria are met. 

Under the Company’s development and commercialization license agreements, the Company receives royalty 
payments based upon its licensees’ net sales of covered products. Generally, under these agreements the Company is to 
receive royalty reports and payments from its licensees approximately one quarter in arrears, that is, generally in the 
second or third month of the quarter after the licensee has sold the royalty bearing product or products. The Company 
recognizes royalty revenues when it can reliably estimate such amounts and collectability is reasonably assured. As such, 

65 

the Company generally recognizes royalty revenues in the quarter reported to the Company by its licensees, or one 
quarter following the quarter in which sales by the Company’s licensees occurred. 

Right-to-Test Agreements 

The Company’s right-to-test agreements provide collaborators the right to (a) test the Company’s ADC 
technology for a defined period of time through a research, or right-to-test, license, (b) take options, for a defined period 
of time, to specified targets and (c) upon exercise of those options, secure or “take” licenses to develop and 
commercialize products for the specified targets on established terms. Under these agreements, fees may be due to the 
Company (i) at the inception of the arrangement (referred to as “upfront” fees or payments), (ii) upon taking an option 
with respect to a specific target (referred to as option fees or payments earned, if any, when the option is “taken”), 
(iii) upon the exercise of a previously taken option to acquire a development and commercialization license(s) (referred 
to as exercise fees or payments earned, if any, when the development and commercialization license is “taken”), or 
(iv) some combination of all of these fees. 

The accounting for right to test agreements is dependent on the nature of the options granted to the 

collaborative partner. Options are considered substantive if, at the inception of a right to test agreement, the Company is 
at risk as to whether the collaborative partner will choose to exercise the options to secure development and 
commercialization licenses. Factors that are considered in evaluating whether options are substantive include the overall 
objective of the arrangement, the benefit the collaborator might obtain from the agreement without exercising the 
options, the cost to exercise the options relative to the total upfront consideration, and the additional financial 
commitments or economic penalties imposed on the collaborator as a result of exercising the options. None of the 
Company’s right to test agreements entered into subsequent to the adoption of Accounting Standards Update, or ASU, 
No. 2009 13, “Revenue Arrangements with Multiple Deliverables” on July 1, 2010 has been determined to contain 
substantive options. For right to test agreements where the options to secure development and commercialization 
licenses to the Company’s ADC technology are not considered substantive, the Company considers the development and 
commercialization licenses to be a deliverable at the inception of the agreement and applies the multiple element revenue 
recognition criteria to determine the appropriate revenue recognition. Subsequent to the adoption of ASU No. 2009-13, 
the Company determined that its research licenses lack stand-alone value and are considered for aggregation with the 
other elements of the arrangement and accounted for as one unit of accounting. 

The Company does not directly control when or if any collaborator will exercise its options for development 

and commercialization licenses. As a result, the Company cannot predict when or if it will recognize revenues in 
connection with any of the foregoing. 

Inventory 

Inventory costs relate to clinical trial materials being manufactured for sale to the Company’s collaborators. 

Inventory is stated at the lower of cost or market as determined on a first-in, first-out (FIFO) basis. 

Inventory at June 30, 2016 and 2015 is summarized below (in thousands): 

June 30,  

Raw materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Work in process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    2016 

$  317   $ 
 590  

      2015 
 279
   2,656
$  907   $  2,935

Raw materials inventory consists entirely of proprietary cell-killing agents the Company developed as part of its 

ADC technology. All raw materials inventory is currently procured from two suppliers. 

Work in process inventory consists of conjugate manufactured for sale to the Company’s collaborators to be 
used in preclinical and clinical studies. All conjugate is made to order at the request of the collaborators and subject to 
the terms and conditions of respective supply agreements. As such, no excess reserve for work in process inventory is 
required. As discussed above, the Company’s costs to manufacture conjugate on behalf of its partners are greater than 
the supply prices charged to partners, and therefore costs are capitalized into inventory at the supply prices. 

66 

 
 
 
 
 
 
 
Raw materials inventory cost is stated net of write-downs of $1.4 million as of June 30, 2016 and June 30, 

2015. The write-downs represent the cost of raw materials that the Company considers to be in excess of a twelve-month 
supply based on firm, fixed orders and projections from its collaborators as of the respective balance sheet date. 

Due to yield fluctuations, the actual amount of raw materials that will be produced in future periods under 

third-party supply agreements is highly uncertain. As such, the amount of raw materials produced could be more than is 
required to support the development of the Company’s collaborators’ product candidates. Such excess supply, as 
determined under the Company’s inventory reserve policy, is charged to research and development expense. 

The Company produces preclinical and clinical materials for its collaborators either in anticipation of or in 

support of preclinical studies and clinical trials, or for process development and analytical purposes. Under the terms of 
supply agreements with its collaborators, the Company generally receives rolling six-month firm, fixed orders for 
conjugate that the Company is required to manufacture, and rolling twelve-month manufacturing projections for the 
quantity of conjugate the collaborator expects to need in any given twelve-month period. The amount of clinical material 
produced is directly related to the number of collaborator anticipated or on-going clinical trials for which the Company 
is producing clinical material, the speed of enrollment in those trials, the dosage schedule of each clinical trial and the 
time period, if any, during which patients in the trial receive clinical benefit from the clinical materials. Because these 
elements are difficult to estimate over the course of a trial, substantial differences between collaborators’ actual 
manufacturing orders and their projections could result in the Company’s usage of raw materials varying significantly 
from estimated usage at an earlier reporting period. To the extent that a collaborator has provided the Company with a 
firm, fixed order, the collaborator is required by contract to reimburse the Company the full negotiated price of the 
conjugate, even if the collaborator subsequently cancels the manufacturing run. 

The Company capitalizes raw material as inventory upon receipt and accounts for the raw material inventory as 

follows: 

a) 

b) 

c) 

to the extent that the Company has up to twelve months of firm, fixed orders and/or projections from 
its collaborators, the Company capitalizes the value of raw materials that will be used in the production 
of conjugate subject to these firm, fixed orders and/or projections; 

the Company considers more than a twelve month supply of raw materials that is not supported by 
firm, fixed orders and/or projections from its collaborators to be excess and establishes a reserve to 
reduce to zero the value of any such excess raw material inventory with a corresponding charge to 
research and development expense; and 

the Company also considers any other external factors and information of which it becomes aware and 
assesses the impact of such factors or information on the net realizable value of the raw material 
inventory at each reporting period. 

During fiscal years 2016, 2015 and 2014, the Company obtained additional amounts of its cell-killing agents 
DMx from its supplier which yielded more material than would be required by the Company’s collaborators over the 
next twelve months, and as a result, the Company recorded $1.1 million, $1.0 million and $364,000,respectively, of 
charges to research and development expense related to raw material inventory identified as excess. Increases in the 
Company’s on-hand supply of raw materials, or a reduction to the Company’s collaborators’ projections, could result in 
significant changes in the Company’s estimate of the net realizable value of such raw material inventory. Reductions in 
collaborators’ projections could indicate that the Company has excess raw material inventory and the Company would 
then evaluate the need to record write-downs as charges to research and development expense. 

Unbilled Revenue 

The majority of the Company’s unbilled revenue at June 30, 2016 and 2015 represents research funding earned 

based on actual resources utilized under the Company’s various collaborator agreements. 

67 

Other Accrued Liabilities 

Other accrued liabilities consisted of the following at June 30, 2016 and 2015 (in thousands): 

Accrued contract payments  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      $ 4,202      $  5,830
    1,735
Accrued clinical trial costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
 788
Accrued professional services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
 567
Accrued employee benefits  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
 192
Accrued public reporting charges  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
Other current accrued liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
    1,329
Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    $ 9,713    $ 10,441

   3,096   
   1,028   
 640   
 192   
 555   

June 30,  

2016 

2015 

Research and Development Expenses 

The Company’s research and development expenses are charged to expense as incurred and relate to 
(i) research to evaluate new targets and to develop and evaluate new antibodies, linkers and cytotoxic agents, 
(ii) preclinical testing of its own and, in certain instances, its collaborators’ product candidates, and the cost of its own 
clinical trials, (iii) development related to clinical and commercial manufacturing processes and (iv) manufacturing 
operations which also include raw materials. Payments made by the Company in advance for research and development 
services not yet provided and/or materials not yet delivered and accepted are recorded as prepaid expenses and are 
included in the accompanying Consolidated Balance Sheets as prepaid and other current assets. 

Income Taxes 

The Company uses the liability method to account for income taxes. Deferred tax assets and liabilities are 

determined based on differences between the financial reporting and income tax basis of assets and liabilities, as well as 
net operating loss carry forwards and tax credits and are measured using the enacted tax rates and laws that will be in 
effect when the differences reverse. A valuation allowance against net deferred tax assets is recorded if, based on the 
available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. 

Financial Instruments and Concentration of Credit Risk 

Cash and cash equivalents are primarily maintained with three financial institutions in the U.S. Deposits with 

banks may exceed the amount of insurance provided on such deposits. Generally, these deposits may be redeemed upon 
demand and, therefore, bear minimal risk. The Company’s cash equivalents consist of money market funds with 
underlying investments primarily being U.S. Government- issued securities and high quality, short-term commercial 
paper. Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of 
cash, cash equivalents and marketable securities. The Company held no marketable securities as of June 30, 2016. The 
Company’s investment policy, approved by the Board of Directors, limits the amount it may invest in any one type of 
investment, thereby reducing credit risk concentrations. 

Cash and Cash Equivalents 

All highly liquid financial instruments with maturities of three months or less when purchased are considered 

cash equivalents. As of June 30, 2016 and June 30, 2015, the Company held $245.0 million and $278.1 million, 
respectively, in cash and money market funds consisting principally of U.S. Government-issued securities and high 
quality, short-term commercial paper which were classified as cash and cash equivalents.  

Non-cash Investing Activities 

The Company had $804,000 of accrued capital expenditures as of June 30, 2016 which have been treated as a 

non-cash investing activity and, accordingly, are not reflected in the consolidated statement of cash flows. Accrued 
capital expenditures as of June 30, 2015 were not material and are included in the consolidated statement of cash flows. 

68 

 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
Fair Value of Financial Instruments 

ASC Topic 820 defines fair value, establishes a framework for measuring fair value in accordance with 
accounting principles generally accepted in the U.S., and expands disclosures about fair value measurements. Fair value 
is defined under ASC Topic 820 as the exchange price that would be received for an asset or paid to transfer a liability 
(an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between 
market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of 
observable inputs and minimize the use of unobservable inputs. The standard describes a fair value hierarchy to measure 
fair value which is based on three levels of inputs, of which the first two are considered observable and the last 
unobservable, as follows: 

•  Level 1—Quoted prices in active markets for identical assets or liabilities. 

•  Level 2—Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices 

for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are 
observable or can be corroborated by observable market data for substantially the full term of the assets or 
liabilities. 

•  Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to 

the fair value of the assets or liabilities. 

As of June 30, 2016, the Company held certain assets that are required to be measured at fair value on a 

recurring basis. The following table represents the fair value hierarchy for the Company’s financial assets measured at 
fair value on a recurring basis as of June 30, 2016 (in thousands): 

Fair Value Measurements at June 30, 2016 Using 
  Quoted Prices in   
  Active Markets for 

Significant   
Significant Other   Unobservable 

Identical Assets    Observable Inputs 

Inputs 

Cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    $ 219,918   $

 219,918   $ 

 —   $

Total 

(Level 1) 

(Level 2) 

(Level 3) 
 —

As of June 30, 2015, the Company held certain assets that are required to be measured at fair value on a 

recurring basis. The following table represents the fair value hierarchy for the Company’s financial assets measured at 
fair value on a recurring basis as of June 30, 2015 (in thousands): 

Fair Value Measurements at June 30, 2015 Using 
  Quoted Prices in  
  Active Markets for 

Significant   
Significant Other   Unobservable 

Identical Assets    Observable Inputs 

Inputs 

Cash equivalents  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total 
  $ 269,304   $

(Level 1) 

(Level 2) 

 269,304    $ 

 —     $

(Level 3) 
 —

The fair value of the Company’s cash equivalents is based primarily on quoted prices from active markets. 

The carrying amounts reflected in the consolidated balance sheets for accounts receivable, unbilled revenue, 

prepaid and other current assets, accounts payable, accrued compensation, and other accrued liabilities approximate fair 
value due to their short-term nature. The carrying amount and estimated fair value of the convertible 4.5% senior notes 
was $100.0 million and $91.2 million, respectively, as of June 30, 2016. The fair value of the Convertible Notes is 
influenced by interest rates, the Company’s stock price and stock price volatility and is determined by prices for the 
Convertible Notes observed in a market which is a Level 2 input for fair value purposes. 

69 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
    
    
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
    
   
    
Property and Equipment 

Property and equipment are stated at cost. The Company provides for depreciation based upon expected useful 

lives using the straight-line method over the following estimated useful lives: 

Machinery and equipment  . . . . . . . . . . . . . . . . . . . .      5 years 
Computer hardware and software  . . . . . . . . . . . . . .      3 years 
Furniture and fixtures . . . . . . . . . . . . . . . . . . . . . . . .      5 years 
Leasehold improvements . . . . . . . . . . . . . . . . . . . . .      Shorter of remaining lease term or 7 years

Equipment under capital leases is amortized over the lives of the respective leases or the estimated useful lives 

of the assets, whichever is shorter, and included in depreciation expense. 

Maintenance and repairs are charged to expense as incurred. Upon retirement or sale, the cost of disposed assets 
and the related accumulated depreciation are removed from the accounts and any resulting gain or loss is included in the 
statement of operations. The Company recorded $21,000, $(7,000) and $(20,000) of gains (losses) on the sale/disposal of 
certain furniture and equipment during the years ended June 30, 2016, 2015, and 2014, respectively. 

Impairment of Long-Lived Assets 

In accordance with ASC Topic 360, “Property, Plant, and Equipment,” the Company continually evaluates 
whether events or circumstances have occurred that indicate that the estimated remaining useful life of its long-lived 
assets may warrant revision or that the carrying value of these assets may be impaired if impairment indicators are 
present. The Company evaluates the realizability of its long-lived assets based on cash flow expectations for the related 
asset. Any write-downs to fair value are treated as permanent reductions in the carrying amount of the assets. Based on 
this evaluation, the Company believes that, as of each of the balance sheet dates presented, none of the Company’s 
long-lived assets were impaired. 

Computation of Net Loss per Common Share 

Basic and diluted net loss per share is calculated based upon the weighted average number of common shares 
outstanding during the period. During periods of income, participating securities are allocated a proportional share of 
income determined by dividing total weighted average participating securities by the sum of the total weighted average 
common shares and participating securities (the “two-class method”). Shares of the Company’s restricted stock 
participate in any dividends that may be declared by the Company and are therefore considered to be participating 
securities. Participating securities have the effect of diluting both basic and diluted earnings per share during periods of 
income. During periods of loss, no loss is allocated to participating securities since they have no contractual obligation to 
share in the losses of the Company. Diluted (loss) income per share is computed after giving consideration to the dilutive 
effect of stock options that are outstanding during the period, except where such non-participating securities would be 
anti-dilutive. 

The Company’s common stock equivalents, as calculated in accordance with the treasury-stock method for the 

options and the if-converted method for the convertible notes, are shown in the following table (in thousands): 

June 30,  

2014 
Options outstanding to purchase common stock and unvested restricted stock     11,919       9,739       8,486
 770      1,820
Common stock equivalents under treasury stock method for options  . . . . . . .    
 —   
Shares issuable upon conversion of convertible notes. . . . . . . . . . . . . . . . . . . .   
 —
 —   
Common stock equivalents under if-converted method for convertible notes .   
 —

 735    
 23,878  
 718  

2015 

2016 

The Company’s common stock equivalents have not been included in the net loss per share calculation because 

their effect is anti-dilutive due to the Company’s net loss position. 

Stock-based Compensation 

As of June 30, 2015, the Company is authorized to grant future awards under one employee share-based 

compensation plan, which is the ImmunoGen, Inc. 2006 Employee, Director and Consultant Equity Incentive Plan, or 
the 2006 Plan. At the annual meeting of shareholders on November 11, 2014, an amendment to the 2006 Plan was 

70 

 
 
 
 
 
 
 
 
 
  
 
 
 
approved and an additional 5,500,000 shares were authorized for issuance under this plan. As amended, the 2006 Plan 
provides for the issuance of Stock Grants, the grant of Options and the grant of Stock-Based Awards for up to 
17,500,000 shares of the Company’s common stock, as well as 1,676,599 shares of common stock which represent 
awards granted under the previous stock option plan, the ImmunoGen, Inc. Restated Stock Option Plan, or the Former 
Plan, that were forfeited, expired or were cancelled without delivery of shares of common stock or which resulted in the 
forfeiture of shares of common stock back to the Company between November 11, 2006 and June 30, 2014. Option 
awards are granted with an exercise price equal to the market price of the Company’s stock at the date of grant. Options 
vest at various periods of up to four years and may be exercised within ten years of the date of grant. 

The stock-based awards are accounted for under ASC Topic 718, “Compensation—Stock Compensation.” 

Pursuant to Topic 718, the estimated grant date fair value of awards is charged to the statement of operations over the 
requisite service period, which is the vesting period. Such amounts have been reduced by an estimate of forfeitures of all 
unvested awards. The fair value of each stock option is estimated on the date of grant using the Black- Scholes 
option-pricing model with the weighted average assumptions noted in the following table. As the Company has not paid 
dividends since inception, nor does it expect to pay any dividends for the foreseeable future, the expected dividend yield 
assumption is zero. Expected volatility is based exclusively on historical volatility data of the Company’s stock. The 
expected term of stock options granted is based exclusively on historical data and represents the period of time that stock 
options granted are expected to be outstanding. The expected term is calculated for and applied to one group of stock 
options as the Company does not expect substantially different exercise or post-vesting termination behavior amongst its 
employee population. The risk-free rate of the stock options is based on the U.S. Treasury rate in effect at the time of 
grant for the expected term of the stock options. 

2014    
Dividend  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    None      None       None  
Volatility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
Risk-free interest rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
Expected life (years) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   

 66.34 %   60.86 %    60.40 %
 1.80 %    1.84 %     1.74 %
 6.3  
 6.3  

 6.3  

Year Ended June 30,  
2015 

    2016 

Using the Black-Scholes option-pricing model, the weighted average grant date fair values of options granted 

during fiscal years 2016, 2015 and 2014 were $8.91, $6.04, and $10.50 per share, respectively. 

A summary of option activity under the 2006 Plan as of June 30, 2016, and changes during the twelve month 

period then ended is presented below (in thousands, except weighted-average data): 

    Weighted(cid:827)    Weighted(cid:827)      

  Number of  Average    Average    Aggregate 
Intrinsic  
  Exercise    Remaining  
Value 
  Life in Yrs  

  Options   

Stock 

Price 

Outstanding at June 30, 2015 . . . . . . . . . . . . . . . . . .
Granted  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited/Canceled . . . . . . . . . . . . . . . . . . . . . . . . . .
Outstanding at June 30, 2016 . . . . . . . . . . . . . . . . . .
Outstanding at June 30, 2016—vested or unvested 
and expected to vest . . . . . . . . . . . . . . . . . . . . . . . .
Exercisable at June 30, 2016  . . . . . . . . . . . . . . . . . .

 9,689   $  12.49  
3,340   $ 14.34  
(555)  $
9.30  
(661)  $ 14.84  
   11,813   $ 13.03   

6.82    $ 

 —

   11,475   $ 13.05   
6,453   $ 12.63   

6.76    $ 
5.30    $ 

 —
 —

In May 2016, November 2012 and January 2015, the Company granted three officers of the Company 75,000, 
50,000 and 25,000 shares of restricted stock, respectively, upon hire. Pursuant to the agreements, the shares vest ratably 
in annual installments over the subsequent four years. The fair value of the restricted stock was determined by the 

71 

 
 
 
 
 
  
 
 
 
 
 
 
 
 
    
 
 
 
 
 
 
 
 
  
 
 
   
  
 
 
   
  
 
 
   
  
 
 
   
  
closing price on the date of grant. A summary of restricted stock activity under the 2006 Plan as of June 30, 2016, and 
changes during the twelve month period then ended is presented below (in thousands, except weighted-average data): 

     Weighted(cid:827)  
  Number of    Average   
Exercise   
  Restricted   
Price 
  Stock Shares 

Unvested at June 30, 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Awarded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vested  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unvested at June 30, 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9.23
 50,000   $ 
 75,000   $ 
5.65
(18,750)  $  10.13
6.54
106,250   $ 

In August 2016, the Company granted 117,800 shares of restricted common stock to certain officers of the 
Company. These restrictions will lapse in three equal installments over five years upon the achievement of specified 
performance goals. 

Stock compensation expense related to stock options and restricted stock awards granted under the 2006 Plan 

was $21.9 million, $15.3 million and $15.6 million during the fiscal years ended June 30, 2016, 2015, and 2014, 
respectively. During fiscal year 2016, the Company recorded approximately $3.1 million of stock compensation cost 
related to the modification of certain outstanding common stock options with the former Chief Executive Officer’s 
succession plan. No similar charges were recorded in fiscal years 2015 and 2014. As of June 30, 2016, the estimated fair 
value of unvested employee awards was approximately $26.6 million, net of estimated forfeitures. The weighted-average 
remaining vesting period for these awards is approximately two years. Included in stock compensation expense for the 
fiscal years ended June 30, 2016, 2015 and 2014 are $380,000, $389,000 and $433,000, respectively, of expense 
recorded for directors’ deferred share units, the details of which are discussed in Note H of the Company’s consolidated 
financial statements.    

A summary of option activity for options vested during the fiscal years ended June 30, 2016, 2015 and 2014 is 

presented below (in thousands): 

Year Ended June 30,  
2015 

2014 

2016 

Total fair value of options vested . . . . . . . . . . . . . . . . . . . . . .
Total intrinsic value of options exercised . . . . . . . . . . . . . . .
Cash received for exercise of stock options  . . . . . . . . . . . . .

Comprehensive Loss 

    $ 15,298     $ 16,145     $ 12,535
    9,961
    9,136

 3,275  
 4,429  

 3,142  
 5,161  

The Company presents comprehensive loss in accordance with ASC Topic 220, Comprehensive Income. 

Comprehensive loss is comprised of the Company’s net loss for the years ended June 30, 2016, 2015 and 2014. 

Segment Information 

During the three fiscal years ended June 30, 2016, the Company continued to operate in one reportable business 

segment under the management approach of ASC Topic 280, Segment Reporting, which is the business of discovery of 
monoclonal antibody-based anticancer therapeutics. 

72 

 
 
 
 
 
    
 
 
 
 
 
  
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The percentages of revenues recognized from significant customers of the Company in the years ended June 30, 

2016, 2015 and 2014 are included in the following table: 

Collaborative Partner: 
Bayer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lilly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Novartis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Roche . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Takeda . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year Ended  
June 30,  

    2016      2015      2014 

 17 %   — %   — %  
 11 %   21 %   18 %
 1 %   43 %   38 %
 43 %   23 %   34 %
 16 %   — %   — %

There were no other customers of the Company with significant revenues in the years ended June 30, 2016, 

2015 and 2014. 

Recent Accounting Pronouncements 

In May 2014, the FASB issued ASU 2014-9, Revenue from Contracts with Customers (Topic 606) (“ASU 

2014-09”), to clarify the principles for recognizing revenue. This update provides a comprehensive new revenue 
recognition model that requires revenue to be recognized in a manner to depict the transfer of goods or services to a 
customer at an amount that reflects the consideration expected to be received in exchange for those goods or services. In 
August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the 
Effective Date, which delayed the effective date of the new standard from January 1, 2017 to January 1, 2018. The FASB 
also agreed to allow entities to choose to adopt the standard as of the original effective date. In March 2016, the FASB 
issued ASU No. 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations, 
which clarifies the implementation guidance on principal versus agent considerations. In April 2016, the FASB issued 
ASU No. 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and 
Licensing, which clarifies certain aspects of identifying performance obligations and licensing implementation guidance. 
In May 2016, the FASB issued ASU No. 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope 
Improvements and Practical Expedients related to disclosures of remaining performance obligations, as well as other 
amendments to guidance on collectibility, non-cash consideration and the presentation of sales and other similar taxes 
collected from customers. These standards have the same effective date and transition date of January 1, 2018. The new 
revenue standard allows for either full retrospective or modified retrospective application. The Company is currently 
evaluating the timing of its adoption, the transition method to apply and the impact that this guidance will have on its 
consolidated financial statements and related disclosures. 

In August 2014, the FASB issued ASU 2014-15, Presentation of Financial Statements-Going Concern 

(Subtopic 205-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern. This new 
standard gives a company’s management the final responsibilities to decide whether there’s substantial doubt about the 
company’s ability to continue as a going concern and to provide related footnote disclosures. The standard provides 
guidance to management, with principles and definitions that are intended to reduce diversity in the timing and content 
of disclosures that companies commonly provide in their footnotes. Under the new standard, management must decide 
whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the company’s 
ability to continue as a going concern within one year after the date that the financial statements are issued, or within one 
year after the date that the financial statements are available to be issued when applicable. This guidance is effective for 
annual reporting beginning after December 15, 2016, including interim periods within the year of adoption, with early 
application permitted. Accordingly, the standard is effective for the Company on January 1, 2017. The Company has not 
yet completed its analysis of the impact of the adoption of this guidance. Refer to Note A, Nature of Business and Plan 
of Operations for further discussion. 

In April 2015, the FASB issued ASU 2015-03, Interest-Imputation of Interest (Subtopic 835-30): Simplifying 

the Presentation of Debt Issuance Costs. To simplify presentation of debt issuance costs, this new standard requires that 
debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the 
carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for 
debt issuance costs are not affected by this update. This guidance is effective for annual reporting beginning after 
December 15, 2015, including interim periods within the year of adoption, and calls for retrospective application, with 
early application permitted. Accordingly, the standard is effective for the Company on July 1, 2016. The Company’s 

73 

 
 
 
 
 
 
 
  
 
 
  
 
 
 
 
 
consolidated balance sheet as of June 30, 2016 includes in assets $7.8 million of debt issuance costs classified as 
deferred financing costs. 

In July 2015, the FASB issued ASU 2015-11, Simplifying the Measurement of Inventory (Topic 330). To 

simplify the principles for subsequent measurement of inventory, this new standard requires inventory measured using 
any method other than LIFO or the retail method shall be measured at the lower of cost and net realizable value, rather 
than lower of cost or market. This guidance is effective for annual reporting beginning after December 15, 2016, 
including interim periods within the year of adoption, and calls for prospective application, with early application 
permitted. Accordingly, the standard is effective for the Company on January 1, 2017. The adoption of this guidance is 
not expected to have a material impact on the Company’s consolidated financial statements. 

In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes (Topic 
740). To simplify the presentation of deferred income taxes, the amendments in this Update require that deferred tax 
liabilities and assets be classified as noncurrent in a classified statement of financial position. This guidance is effective 
for annual reporting beginning after December 15, 2016, including interim periods within the year of adoption, with 
early application permitted. The Company implemented the recommendations of this Update prospectively in the second 
quarter of fiscal year 2016, resulting in a reduction of long-term assets and current liabilities of approximately $843,000 
as of December 31, 2015. The prior period balances were not retrospectively adjusted. 

In January 2016, the FASB issued ASU 2016-1, Recognition and Measurement of Financial Assets and 

Financial Liabilities (Topic 825). The amendments in this Update supersede the guidance to classify equity securities 
with readily determinable fair values into different categories (that is, trading or available-for-sale) and require equity 
securities (including other ownership interests, such as partnerships, unincorporated joint ventures, and limited liability 
companies) to be measured at fair value with changes in the fair value recognized through net income. The amendments 
allow equity investments that do not have readily determinable fair values to be remeasured at fair value either upon the 
occurrence of an observable price change or upon identification of an impairment. The amendments also require 
enhanced disclosures about those investments. The amendments improve financial reporting by providing relevant 
information about an entity’s equity investments and reducing the number of items that are recognized in other 
comprehensive income. This guidance is effective for annual reporting beginning after December 15, 2017, including 
interim periods within the year of adoption, and calls for prospective application, with early application permitted. 
Accordingly, the standard is effective for the Company on January 1, 2018. The adoption of this guidance is not 
expected to have a material impact on the Company’s consolidated financial statements. 

In February 2016, the FASB issued ASU 2016-2, Leases (Topic 842) that primarily requires lessees to 

recognize most leases on their balance sheets but record expenses on their income statements in a manner similar to 
current accounting. For lessors, the guidance modifies the classification criteria and the accounting for sales-type and 
direct financing leases. The guidance is effective for fiscal years beginning after December 15, 2018, including interim 
periods within those fiscal years, and calls for retrospective application, with early adoption permitted. Accordingly, the 
standard is effective for the Company on January 1, 2019. The Company is currently evaluating the impact of this 
guidance on our financial statements and the timing of adoption. 

In March 2016, the FASB issued ASU 2016-9, Improvements to Employee Share-Based Payment Accounting 

(Topic 718) that changes the accounting for certain aspects of share-based payments to employees. The guidance 
requires the recognition of the income tax effects of awards in the income statement when the awards vest or are settled, 
thus eliminating additional paid in capital pools. The guidance also allows for the employer to repurchase more of an 
employee’s shares for tax withholding purposes without triggering liability accounting. In addition, the guidance allows 
for a policy election to account for forfeitures as they occur rather than on an estimated basis. The guidance is effective 
for annual periods beginning after December 15, 2016, and interim periods within those annual periods with early 
adoption permitted. Accordingly, the standard is effective for the Company on January 1, 2017. The Company is 
currently evaluating the impact of this guidance on our financial statements and the timing of adoption. 

74 

 
 
 
 
 
 
 
 
 
C.       Agreements 

Significant Collaborative Agreements 

Roche 

In 2000, the Company granted Genentech, now a unit of Roche, an exclusive license to use the Company’s 

maytansinoid ADC technology with antibodies, such as trastuzumab, or other proteins that target HER2. Under the terms 
of this agreement, Roche has exclusive worldwide rights to develop and commercialize maytansinoid ADC compounds 
targeting HER2. In 2013, the HER2-targeting ADC compound, Kadcyla, was approved for marketing in the U.S., Japan 
and the European Union, or EU. Roche has also received marketing approval in various other countries around the 
world. Roche is responsible for the manufacturing, product development and marketing of any products resulting from 
the agreement. The Company is compensated for any preclinical and clinical materials that the Company manufactures 
under the agreement. The Company received a $2 million non-refundable upfront payment from Roche upon execution 
of the agreement. The Company is also entitled to receive up to a total of $44 million in milestone payments, plus 
royalties on the commercial sales of Kadcyla or any other resulting products. Total milestones are categorized as 
follows: development milestones—$13.5 million; and regulatory milestones—$30.5 million. Through June 30, 2016, the 
Company has received and recognized $13.5 million and $20.5 million in development and regulatory milestone 
payments, respectively, related to Kadcyla. The Company received two $5 million regulatory milestone payments in 
connection with marketing approval of Kadcyla in Japan and in the EU, which is included in license and milestone fees 
for the fiscal year ended June 30, 2014. Based on an evaluation of the effort contributed to the achievement of these 
milestones in fiscal year 2014, the Company determined these milestones were not substantive. In consideration that 
there were no undelivered elements remaining, no continuing performance obligations and all other revenue recognition 
criteria had been met, the Company recognized the non-refundable payments as revenue upon achievement of the 
milestones. The next potential milestone the Company will be entitled to receive will be a $5 million regulatory 
milestone for marketing approval of Kadcyla for a first extended indication as defined in the agreement. Based on an 
evaluation of the effort contributed towards the achievement of this future milestone, the Company determined this 
milestone is not substantive. 

The Company receives royalty reports and payments related to sales of Kadcyla from Roche one quarter in 

arrears. In accordance with the Company’s revenue recognition policy, $25.3 million of non-cash royalties on net sales 
of Kadcyla for the twelve-month period ended March 31, 2016 were recorded and included in royalty revenue for the 
year ended June 30, 2016 and $5.5 million of non-cash royalties and $13.9 million of cash royalties on net sales of 
Kadcyla for the twelve-month period ended March 31, 2015 is included in royalty revenue for the year ended June 30, 
2015. The Company recorded $10.3 million of cash royalties on net sales of Kadcyla for the twelve-month period ended 
March 31, 2014 for the year ended June 30, 2014. Kadcyla sales occurring after January 1, 2015 are covered by a royalty 
purchase agreement whereby the associated cash is remitted to Immunity Royalty Holdings, L.P, or IRH, as discussed 
further in Note F.  

Roche, through its Genentech unit, also has licenses for the exclusive right to use the Company’s maytansinoid 

ADC technology with antibodies to four undisclosed targets, which were granted under the terms of a separate, now 
expired 2000 right-to-test agreement with Genentech. For each of these licenses the Company received a $1 million 
license fee and is entitled to receive up to a total of $38 million in milestone payments and also royalties on the sales of 
any resulting products. The total milestones are categorized as follows: development milestones—$8 million; regulatory 
milestones—$20 million; and sales milestones—$10 million. The Company has not received any milestone payments 
from these agreements through June 30, 2016. Roche is responsible for the development, manufacturing, and marketing 
of any products resulting from these licenses. The next potential milestone the Company will be entitled to receive under 
any of these agreements will be a development milestone for filing of an IND application which will result in a 
$1 million payment being due. At the time of execution of each of these development and commercialization licenses, 
there was significant uncertainty as to whether this milestone would be achieved. In consideration of this, as well as the 
Company’s past involvement in the research and manufacturing these products, this milestone was deemed substantive. 
The Company received non-refundable technology access fees totaling $5 million for the eight-year term of the 
right-to-test agreement. The upfront fees were deferred and recognized ratably over the period during which Genentech 
could elect to obtain product licenses. 

75 

Amgen 

Under a now-expired right-to-test agreement established in 2000, Amgen took three exclusive development and 
commercialization licenses, for which the Company received an exercise fee of $1 million for each license taken. In May 
2013, Amgen took one non-exclusive development and commercialization license, for which the Company received an 
exercise fee of $500,000. In October 2013, the non-exclusive license was amended and converted to an exclusive 
license, for which Amgen paid an additional $500,000 fee to the Company. Amgen has sublicensed its rights under this 
license to Oxford BioTherapeutics Ltd. In December 2015, Amgen advised the Company that it had discontinued 
development of two product candidates, AMG 595 and AMG 172 that had been covered by two of Amgen’s four 
exclusive licenses, and in February 2016, Amgen terminated these two licenses.  

For each of the two remaining development and commercialization license taken, the Company is entitled to 

receive up to a total of $34 million in milestone payments, plus royalties on the commercial sales of any resulting 
products. The total milestones per license are categorized as follows: development milestones—$9 million; regulatory 
milestones—$20 million; and sales milestones—$5 million. Amgen (or its sublicensee(s)) is responsible for the 
manufacturing, product development and marketing of any products resulting from these development and 
commercialization licenses. Through June 30, 2016, the Company has received and recognized an aggregate of $3 
million in milestone payments for compounds covered under this agreement now or in the past. In September 2015, 
Amgen’s IND application under the remaining license not sublicensed to Oxford BioTherapeutics became effective, 
triggering a $1 million milestone payment to the Company which is included in license and milestone fee revenue for the 
year ended June 30, 2016. The next potential milestone the Company will be entitled to receive under this license will be 
a development milestone for the first dosing of a patient in a Phase II clinical trial, which will result in a $3 million 
payment being due. The next potential milestone the Company will be entitled to receive under the May 2013 license 
will be a $1 million development milestone for an IND becoming effective. At the time of execution of each of these 
development and commercialization licenses, there was significant uncertainty as to whether these milestones would be 
achieved. In consideration of this, as well as the Company’s past involvement in the research and manufacturing of these 
product candidates, these milestones were deemed substantive. 

Since a deliverable to the original right-to-test agreement was determined to be materially modified at the time 
the non-exclusive license was converted to exclusive in October 2013, the Company accounted for the multiple-element 
agreement in accordance with ACS 605-25 (as amended by ASU No. 2009-13). As a result, all of the deferred revenue 
recorded on the date of the modification and the new consideration received as part of the modification was allocated to 
all of the remaining deliverables at the time of amendment of the right-to-test agreement based on the estimated selling 
price of each element. The remaining amount represents consideration for previously delivered elements and was 
recognized upon the execution of the modification. 

The outstanding licenses, including the exclusive license delivered upon the signing of the amendment, contain 

the rights to future technological improvements as well as options to purchase materials and research and development 
services. The Company concluded that additional materials and research and development services would be paid at a 
contractual price equal to the estimated selling price based estimated prices that would be charged by third parties for 
similar services. The estimated selling price of the right to technological improvements is the Company’s best estimate 
of selling price and was determined by estimating the probability that technological improvements will be made and the 
probability that such technological improvements made will be used by Amgen. In estimating these probabilities, we 
considered factors such as the technology that is the subject of the development and commercialization licenses, our 
history of making technological improvements, and when such improvements, if any, were likely to occur relative to the 
stage of development of any product candidates pursuant to the development and commercialization licenses. The 
Company’s estimate of probability considered the likely period of time that any improvements would be utilized, which 
was estimated to be ten years following delivery of a commercialization and development license. The value of any 
technological improvements made available after this ten year period was considered to be de minimis due to the 
significant additional costs that would be incurred to incorporate such technology into any existing product candidates. 
The estimate of probability was multiplied by the estimated selling price of the development and commercialization 
licenses and the resulting cash flow was discounted at a rate of 13%, representing the Company’s estimate of its cost of 
capital at the time of amendment of the right-to-test agreement. 

The $430,000 determined to be the estimated selling price of the future technological improvements is being 

recognized as revenue ratably over the period the Company is obligated to make available any technological 
improvements, which is equivalent to the estimated term of the agreement. The Company estimates the term of a 
development and commercialization license to be approximately 25 years, which reflects management’s estimate of the 

76 

time necessary to develop and commercialize products pursuant to the license plus the estimated royalty term. The 
Company reassesses the estimated term at the end of each reporting period. 

After accounting for the undelivered elements at the estimated selling price, the Company had $2.2 million of 

remaining allocable consideration which was determined to represent consideration for the previously delivered 
elements, including the exclusive license that was delivered upon the execution of the modification. This amount was 
recorded as revenue and is included in license and milestone fees for the year ended June 30, 2014. 

Costs directly attributable to the Amgen collaborative agreement are comprised of compensation and benefits 
related to employees who provided research and development services on behalf of Amgen as well as costs of clinical 
materials sold. Indirect costs are not identified to individual collaborators. The costs related to the research and 
development services amounted to approximately $15,000, $62,000 and $179,000 for fiscal years 2016, 2015 and 2014, 
respectively. The costs related to clinical materials sold were approximately $664,000 for fiscal year 2014. There were 
no similar costs recorded in fiscal years 2016 and 2015. 

Sanofi 

Collaboration Agreement 

In 2003, the Company entered into a broad collaboration agreement with Sanofi (formerly Aventis) to discover, 

develop and commercialize antibody-based products. The collaboration agreement provides Sanofi with worldwide 
development and commercialization rights to new antibody-based products directed to targets that are included in the 
collaboration, including the exclusive right to use the Company’s maytansinoid ADC technology in the creation of 
products developed to these targets. The product candidates (targets) as of June 30, 2016 in the collaboration include 
isatuximab (CD38), SAR566658 (CA6), SAR408701 (CEACAM5) and one earlier-stage program that has yet to be 
disclosed. 

The Company is entitled to receive milestone payments potentially totaling $21.5 million, per target, plus 
royalties on the commercial sales of any resulting products. The total milestones are categorized as follows: development 
milestones—$7.5 million; and regulatory milestones—$14 million. Through June 30, 2016, the Company has received 
and recognized an aggregate of $20.5 million in milestone payments for compounds covered under this agreement now 
or in the past, including a $3 million development milestone related to initiation of a Phase IIb clinical trial (as defined in 
the agreement) for isatuximab and a $1 million development milestone related to initiation of a Phase I clinical trial for 
SAR408701 which are included in license and milestone fee revenue for the year ended June 30, 2015. The next 
potential milestone the Company will be entitled to receive for each of SAR566658 and SAR408701 will be a 
development milestone for initiation of a Phase IIb clinical trial (as defined in the agreement), which will result in each 
case in a $3 million payment being due. The next potential milestone the Company will be entitled to receive with 
respect to isatuximab will be a development milestone for initiation of a Phase III clinical trial, which will result in a 
$3 million payment being due. The next potential milestone the Company will be entitled to receive for the unidentified 
target will be a development milestone for commencement of a Phase I clinical trial, which will result in a $1 million 
payment being due. At the time of execution of this agreement, there was significant uncertainty as to whether these 
milestones would be achieved. In consideration of this, as well as the Company’s past involvement in the research and 
manufacturing of these product candidates, these milestones were deemed substantive. 

Right-to-Test Agreement 

Under a separate, now expired right-to-test agreement, in December 2013, Sanofi took one exclusive 
development and commercialization license. Under this license, the Company received an exercise fee of $2 million and 
was recognizing this amount as revenue ratably over the Company’s estimated period of its substantial involvement. The 
Company had previously estimated this development period would conclude at the end of non-pivotal Phase II testing. 
During fiscal 2015, the Company determined it would not be substantially involved in the development and 
commercialization of the product based on Sanofi’s current plans to develop and manufacture the product without the 
assistance of the Company. As a result of this determination, the Company recognized the balance of the upfront 
exercise fee during the first quarter of fiscal 2015. This change in estimate resulted in an increase to license and 
milestone fees of $1.5 million for the year ended June 30, 2015 compared to amounts that would have been recognized 
pursuant to the Company’s previous estimate.  

77 

Under this license, the Company is entitled to receive up to a total of $30 million in milestone payments, plus 

royalties on the commercial sales of any resulting products. The total milestones are categorized as follows: development 
milestones—$10 million; and regulatory milestones—$20 million. In October 2015, Sanofi initiated Phase I, first-in-
human clinical testing of its ADC product candidate, SAR428926 (LAMP1), triggering a $2 million development 
milestone payment to the Company which is included in license and milestone fee revenue for the year ended June 30, 
2016. The next milestone payment the Company could receive would be a $4 million development milestone for 
commencement of a Phase IIb clinical trial (as defined in the agreement) under this license. At the time of execution of 
this agreement, there was significant uncertainty as to whether these milestones would be achieved. In consideration of 
this, as well as the Company’s expected involvement in the research and manufacturing of this product candidate, these 
milestones were deemed substantive. Sanofi is responsible for the manufacturing, product development and marketing of 
any products resulting from the agreement. 

Biotest 

In 2006, the Company granted Biotest an exclusive development and commercialization license to our 
maytansinoid ADC technology for use with antibodies that target CD138. The product candidate indatuximab ravtansine 
is in development under this agreement. Biotest is responsible for the manufacturing, product development and 
marketing of any products resulting from the agreement. The Company received a $1 million upfront payment upon 
execution of the agreement and could receive up to $35.5 million in milestone payments, as well as royalties on the 
commercial sales of any resulting products. The total milestones are categorized as follows: development milestones—
$4.5 million; and regulatory milestones—$31 million. The Company receives payments for manufacturing any 
preclinical and clinical materials made at the request of Biotest. In September 2008, Biotest began Phase I evaluation of 
indatuximab ravtansine which triggered a $500,000 milestone payment to the Company. The next potential milestone the 
Company will be entitled to receive will be a development milestone for commencement of a Phase IIb clinical trial (as 
defined in the agreement) which will result in a $2 million payment being due. At the time of execution of this 
agreement, there was significant uncertainty as to whether these milestones would be achieved. In consideration of this, 
as well as the Company’s past involvement in the research and manufacturing of this product, these milestones were 
deemed substantive. 

The agreement also provided the Company with the right to elect at specific stages during the clinical 
evaluation of any compound created under this agreement, to participate in the U.S. development and commercialization 
of that compound in lieu of receiving the milestone payments not yet earned and royalties on sales in the U.S. Currently, 
the Company can exercise this right during an exercise period specified in the agreement by notice and payment to 
Biotest of an agreed upon opt-in fee of $15 million. Upon exercise of this right, the Company would share equally with 
Biotest the associated further costs of product development and commercialization in the U.S. along with the profit, if 
any, from product sales in the U.S. The Company would also be entitled to receive royalties, on a reduced basis, on 
product sales outside the U.S. 

Costs directly attributable to the Biotest collaborative agreement are comprised of compensation and benefits 
related to employees who provided research and development services on behalf of Biotest as well as costs of clinical 
materials sold. Indirect costs are not identified to individual collaborators. The costs related to the research and 
development services amounted to approximately $160,000, $309,000 and $305,000 for fiscal years 2016, 2015 and 
2014, respectively. The costs related to clinical materials sold were approximately $1.8 million, $3 million and $670,000 
for fiscal years 2016, 2015 and 2014, respectively. 

Bayer  

In 2008, the Company granted Bayer an exclusive development and commercialization license to the 

Company’s maytansinoid ADC technology for use with antibodies or other proteins that target mesothelin. Bayer 
HealthCare is responsible for the research, development, manufacturing and marketing of any products resulting from 
the license. The Company received a $4 million upfront payment upon execution of the agreement, and—for each 
compound developed and marketed by Bayer under this collaboration—the Company is entitled to receive a total of 
$170.5 million in milestone payments, plus tiered royalties between 4 - 7% on the commercial sales of any resulting 
products. The total milestones are categorized as follows: development milestones—$16 million; regulatory 
milestones—$44.5 million; and sales milestones—$110 million. Through June 30, 2016, the Company has received and 
recognized an aggregate of $13 million in milestone payments under this agreement. In January 2016, Bayer initiated a 
Phase II clinical study designed to support registration of its ADC product candidate, anetumab ravtansine, triggering a 
$10 million development milestone payment to the Company which is included in license and milestone fee revenue for 

78 

the year ended June 30, 2016. The next potential milestone the Company will be entitled to receive will be either a 
development milestone for commencement of a pivotal clinical trial for a second indication for anetumab ravtansine 
which will result in a $2 million payment being due or a regulatory milestone for filing of regulatory approval for its first 
indication for anetumab ravtansine which will result in a $6 million payment being due. At the time of execution of this 
agreement, there was significant uncertainty as to whether these milestones would be achieved. In consideration of this, 
as well as the Company’s past involvement in the research and supply of cytotoxic agent for this product candidate, 
these milestones was deemed substantive. 

The Company had previously deferred the $4 million upfront payment received and was recognizing this 
amount as revenue ratably over the estimated period of substantial involvement. The Company had previously estimated 
this development period would conclude at the end of non-pivotal Phase II testing. During the first quarter of fiscal 2012, 
Bayer initiated Phase I clinical testing of its product candidate. In reaching this stage of clinical testing, Bayer developed 
its own processes for manufacturing required clinical material and produced clinical material in its own manufacturing 
facility. Considering that Bayer was able to accomplish this without significant reliance on the Company, and 
considering that the Company’s expected future involvement would be primarily supplying Bayer with small quantities 
of cytotoxic agents for a limited period of time, the Company believed its period of substantial involvement would end 
prior to the completion of non-pivotal Phase II testing. As a result of this determination, beginning in September 2011, 
the Company recognized the balance of the upfront payment as revenue ratably through September 2012.  

Novartis 

Novartis took six exclusive development and commercialization licenses under a now-expired right-to-test 

agreement established in 2010. The Company received a $45 million upfront payment in connection with the execution 
of the right-to-test agreement in 2010, and for each development and commercialization license taken for a specific 
target, the Company received an exercise fee of $1 million and is entitled to receive up to a total of $199.5 million in 
milestone payments, plus royalties on the commercial sales of any resulting products. The total milestones are 
categorized as follows: development milestones—$22.5 million; regulatory milestones—$77 million; and sales 
milestones—$100 million. The initial three-year term of the right-to-test agreement was extended by Novartis in October 
2013 for an additional one-year period by payment of a $5 million fee to the Company. The Company also is entitled to 
receive payments for research and development activities performed on behalf of Novartis. Novartis is responsible for 
the manufacturing, product development and marketing of any products resulting from this agreement. 

In March 2013, the Company and Novartis amended the right-to-test agreement so that Novartis could take a 

license to develop and commercialize products directed at two undisclosed, related targets, one target licensed on an 
exclusive basis and the other target initially licensed on a non-exclusive basis. The target licensed on a non-exclusive 
basis may no longer be converted to an exclusive target due to the expiration of the right-to-test agreement. The 
Company received a $3.5 million fee in connection with the execution of the amendment to the agreement. The 
Company may be required to credit this fee against future milestone payments if Novartis discontinues the development 
of a specified product under certain circumstances. 

In connection with the amendment, in March 2013, Novartis took the license referenced above under the 

right-to-test agreement, as amended, enabling it to develop and commercialize products directed at the two targets. The 
Company received a $1 million upfront fee with the execution of this license. Additionally, the execution of this license 
provides the Company the opportunity to receive milestone payments totaling $199.5 million (development 
milestones—$22.5 million; regulatory milestones—$77 million; and sales milestones—$100 million) or $238 million 
(development milestones—$22.5 million; regulatory milestones—$115.5 million; and sales milestones—$100 million), 
depending on the composition of any resulting products. 

In October 2013 and November 2013, Novartis took its second and third exclusive licenses to single targets, 

and in October 2014, took three remaining exclusive licenses, each triggering a $1 million payment to the Company and 
the opportunity to receive milestone payments totaling $199.5 million, as outlined above, plus royalties on the 
commercial sales of any resulting products. In January 2015 and May 2015, Novartis initiated Phase I, first-in-human 
clinical testing of its cKit-targeting ADC product candidate, LOP628, and P-cadherin-targeting ADC product candidate, 
PCA062, respectively, triggering a $5 million development milestone payment to the Company with each event, both of 
which are included in license and milestone fee revenue for the year ended June 30, 2015. The next payment the 
Company could receive would be either a $7.5 million development milestone for commencement of a Phase II clinical 
trial under these two licenses or a $5 million development milestone for commencement of a Phase I clinical trial under 
any of its other four licenses. At the time of execution of these agreements, there was significant uncertainty as to 

79 

whether these milestones would be achieved. In consideration of this, as well as the Company’s past involvement in the 
research and manufacturing of these product candidates, these milestones were deemed substantive. Additionally, the 
Company is entitled to receive royalties on product sales, if any. 

In accordance with ACS 605-25 (as amended by ASU No. 2009-13), the Company identified all of the 
deliverables at the inception of the right-to-test agreement and subsequently when amended. The significant deliverables 
were determined to be the right-to-test, or research, license, the development and commercialization licenses, rights to 
future technological improvements, and the research services. The options to obtain development and commercialization 
licenses in the right-to-test agreement were determined not to be substantive and, as a result, the exclusive development 
and commercialization licenses were considered deliverables at the inception of the right-to-test agreement. Factors that 
were considered in determining the options were not substantive included (i) the overall objective of the agreement was 
for Novartis to obtain development and commercialization licenses, (ii) the size of the exercise fee of $1 million for each 
development and commercialization license obtained is not significant relative to the $45 million upfront payment that 
was due at the inception of the right-to-test agreement, (iii) the limited economic benefit that Novartis could obtain from 
the right-to-test agreement unless it exercised its options to obtain development and commercialization licenses, and 
(iv) the lack of economic penalties as a result of exercising the options. 

The Company has determined that the research license together with the development and commercialization 
licenses represent one unit of accounting as the research license does not have stand-alone value from the development 
and commercialization licenses due to the lack of transferability of the research license and the limited economic benefit 
Novartis would derive if they did not obtain any development and commercialization licenses. The Company has also 
determined that this unit of accounting does have stand-alone value from the rights to future technological improvements 
and the research services. The rights to future technological improvements and the research services are considered 
separate units of accounting as each of these was determined to have stand-alone value. The rights to future 
technological improvements have stand-alone value as Novartis would be able to use those items for their intended 
purpose without the undelivered elements. The research services have stand-alone value as similar services are sold 
separately by other vendors. 

The estimated selling prices for the development and commercialization licenses are the Company’s best 

estimate of selling price and were determined based on market conditions, similar arrangements entered into by third 
parties, including the Company’s understanding of pricing terms offered by its competitors for single-target development 
and commercialization licenses that utilize ADC technology, and entity-specific factors such as the pricing terms of the 
Company’s previous single-target development and commercialization licenses, recent preclinical and clinical testing 
results of therapeutic products that use the Company’s ADC technology, and the Company’s pricing practices and 
pricing objectives. The estimated selling price of the right to technological improvements is the Company’s best estimate 
of selling price and was determined by estimating the probability that technological improvements will be made and the 
probability that such technological improvements made will be used by Novartis. In estimating these probabilities, we 
considered factors such as the technology that is the subject of the development and commercialization licenses, our 
history of making technological improvements, and when such improvements, if any, were likely to occur relative to the 
stage of development of any product candidates pursuant to the development and commercialization licenses. The 
Company’s estimate of probability considered the likely period of time that any improvements would be utilized, which 
was estimated to be ten years following delivery of a commercialization and development license. The value of any 
technological improvements made available after this ten year period was considered to be de minimis due to the 
significant additional costs that would be incurred to incorporate such technology into any existing product candidates. 
The estimate of probability was multiplied by the estimated selling price of the development and commercialization 
licenses and the resulting cash flow was discounted at a rate of 16%, representing the Company’s estimate of its cost of 
capital at the time. The estimated selling price of the research services was based on third-party evidence given the 
nature of the research services to be performed for Novartis and market rates for similar services. 

Upon payment of the extension fee in October 2013, the total arrangement consideration of $60.2 million 

(which comprises the $45 million upfront payment, the amendment fee of $3.5 million, the $5 million extension fee, the 
exercise fee for each license, and the expected fees for the research services to be provided under the remainder of the 
arrangement) was reallocated to the deliverables based on the relative selling price method as follows: $55 million to the 
delivered and undelivered development and commercialization licenses; $4.5 million to the rights to future technological 
improvements; and $710,000 to the research services. The Company recorded $25.7 million of the $55 million of the 
arrangement consideration outlined above for the three development and commercialization licenses taken in October 
2014, which is included in license and milestone fee revenue for the year ended June 30, 2015, $17.2 million for the two 
development and commercialization licenses taken by Novartis in October 2013 and November 2013, which is included 

80 

in license and milestone fee revenue for the year ended June 30, 2014, and $11.1 million for the development and 
commercialization licenses taken in March 2013. The Company also recorded a cumulative catch-up of $1 million for 
the license delivered in March 2013 and the delivered portion of the license covering future technological improvements, 
which is included in license and milestone fee revenue for the year ended June 30, 2014. 

Since execution of the first development and commercialization license taken in March 2013, the amount of the 

total arrangement consideration allocated to future technological improvements is being recognized as revenue ratably 
over the period the Company is obligated to make available any technological improvements, which is equivalent to the 
estimated term of the agreement. The Company estimates the term of a development and commercialization license to be 
approximately 25 years, which reflects management’s estimate of the time necessary to develop and commercialize 
products pursuant to the license plus the estimated royalty term. The Company reassesses the estimated term at the end 
of each reporting period. The Company will recognize research services revenue as the related services are delivered. 

Costs directly attributable to the Novartis collaborative agreement are comprised of compensation and benefits 
related to employees who provided research and development services on behalf of Novartis as well as costs of clinical 
materials sold. Indirect costs are not identified to individual collaborators. The costs related to the research and 
development services amounted to $67,000, $141,000 and $1.4 million for fiscal years 2016, 2015 and 2014, 
respectively. The costs related to clinical materials sold were approximately $644,000 and $1.3 million for fiscal years 
2015 and 2014, respectively. There were no similar costs recorded in fiscal year 2016. 

Lilly 

Eli Lilly and Company (Lilly) took three exclusive development and commercialization licenses under a now-

expired right-to-test agreement established in 2011. The Company received a $20 million upfront payment in connection 
with the execution of the right-to-test agreement in 2011. Under the terms of this right-to-test agreement, the first license 
had no associated exercise fee, and the second and third licenses each had a $2 million exercise fee. The first 
development and commercialization license was taken in August 2013 and the agreement was amended in December 
2013 to provide Lilly with an extension provision and retrospectively include a $2 million exercise fee for the first 
license in lieu of the fee due for either the second or third license. The second and third licenses were taken in December 
2014, with one including the $2 million exercise fee and the other not. Under the two licenses with the $2 million 
exercise fee, the Company is entitled to receive up to a total of $199 million in milestone payments, plus royalties on the 
commercial sales of any resulting products. Under the license taken in December 2014 without the exercise fee, the 
Company is entitled to receive up to a total of $200.5 million in milestone payments, plus royalties on the commercial 
sales of any resulting products. The total milestones are categorized as follows: development milestones—$29 million 
for the two development and commercialization licenses with the $2 million exercise fee, and $30.5 million for the one 
development and commercialization license with no exercise fee; regulatory milestones—$70 million in all cases; and 
sales milestones—$100 million in all cases. In September 2015, Lilly began Phase I evaluation of one of its licensed 
ADC products which triggered a $5 million milestone payment to the Company which is included in license and 
milestone fee revenue for the fiscal year ended June 30, 2016. The next payment the Company could receive would be 
either a $9 million development milestone for commencement of a Phase II clinical trial under this license or a 
$5 million development milestone payment with the initiation of a Phase I clinical trial under either of its other two 
development and commercialization licenses taken. At the time of execution of this agreement, there was significant 
uncertainty as to whether these milestones would be achieved. In consideration of this, as well as the Company’s 
expected involvement in the research and manufacturing of these product candidates, these milestones were deemed 
substantive. The Company also is entitled to receive payments for delivery of cytotoxic agents to Lilly and research and 
development activities performed on behalf of Lilly. Lilly is responsible for the manufacturing, product development and 
marketing of any products resulting from this collaboration.  

In accordance with ASC 605-25 (as amended by ASU No. 2009-13), the Company identified all of the 

deliverables at the inception of the right- to-test agreement. The significant deliverables were determined to be the 
right-to-test, or research, license, the exclusive development and commercialization licenses, rights to future 
technological improvements, delivery of cytotoxic agents and the research services. The options to obtain development 
and commercialization licenses in the right-to-test agreement were determined not to be substantive and, as a result, the 
exclusive development and commercialization licenses were considered deliverables at the inception of the right-to-test 
agreement. Factors that were considered in determining the options were not substantive included (i) the overall 
objective of the agreement was for Lilly to obtain development and commercialization licenses, (ii) the size of the 
exercise fees of $2 million for each development and commercialization license taken beyond the first license is not 
significant relative to the $20 million upfront payment that was due at the inception of the right-to-test agreement, 

81 

(iii) the limited economic benefit that Lilly could obtain from the right-to-test agreement unless it exercised its options to 
obtain development and commercialization licenses, and (iv) the lack of economic penalties as a result of exercising the 
options. 

The Company has determined that the research license together with the development and commercialization 
licenses represent one unit of accounting as the research license does not have stand-alone value from the development 
and commercialization licenses due to the lack of transferability of the research license and the limited economic benefit 
Lilly would derive if they did not obtain any development and commercialization licenses. The Company has also 
determined that this unit of accounting has stand-alone value from the rights to future technological improvements, the 
delivery of cytotoxic agents and the research services. The rights to future technological improvements, delivery of 
cytotoxic agents and the research services are considered separate units of accounting as each of these was determined to 
have stand-alone value. The rights to future technological improvements have stand-alone value as Lilly would be able 
to use those items for their intended purpose without the undelivered elements. The research services and cytotoxic 
agents have stand-alone value as similar services and products are sold separately by other vendors. 

The estimated selling prices for the development and commercialization licenses are the Company’s best 

estimate of selling price and were determined based on market conditions, similar arrangements entered into by third 
parties, including pricing terms offered by our competitors for single-target development and commercialization licenses 
that utilize antibody-drug conjugate technology, and entity-specific factors such as the pricing terms of the Company’s 
previous single-target development and commercialization licenses, recent preclinical and clinical testing results of 
therapeutic products that use the Company’s ADC technology, and the Company’s pricing practices and pricing 
objectives. The estimated selling price of the rights to technological improvements is the Company’s best estimate of 
selling price and was determined by estimating the probability that technological improvements will be made, and the 
probability that technological improvements made will be used by Lilly. In estimating these probabilities, we considered 
factors such as the technology that is the subject of the development and commercialization licenses, our history of 
making technological improvements, and when such improvements, if any, were likely to occur relative to the stage of 
development of any product candidates pursuant to the development and commercialization licenses. The company’s 
estimate of probability considered the likely period of time that any improvements would be utilized, which was 
estimated to be ten years following delivery of a commercialization and development license. The value of any 
technological improvements made available after this ten year period was considered to be de minimis due to the 
significant additional costs that would be incurred to incorporate such technology into any existing product candidates. 
The estimate of probability was multiplied by the estimated selling price of the development and commercialization 
licenses and the resulting cash flow was discounted at a rate of 16%, representing the Company’s estimate of its cost of 
capital at the time. The estimated selling price of the cytotoxic agent was based on third-party evidence given market 
rates for the manufacture of such cytotoxic agents. The estimated selling price of the research services was based on 
third-party evidence given the nature of the research services to be performed for Lilly and market rates for similar 
services. 

The total arrangement consideration of $28.2 million (which comprises the $20 million upfront payment, the 

exercise fee, if any, for each license, the expected fees for the research services to be provided and the cytotoxic agent to 
be delivered under the arrangement) was allocated to the deliverables based on the relative selling price method as 
follows: $23.5 million to the development and commercialization licenses; $0.6 million to the rights to future 
technological improvements, $0.8 million to the sale of cytotoxic agent; and $3.3 million to the research services. Upon 
execution of the development and commercialization license taken by Lilly in August 2013, the Company recorded 
$7.8 million of the $23.5 million of the arrangement consideration outlined above, which is included in license and 
milestone fee revenue for the year ended June 30, 2014. With this first development and commercialization license 
taken, the amount of the total arrangement consideration allocated to future technological improvements will commence 
to be recognized as revenue ratably over the period the Company is obligated to make available any technological 
improvements, which is the equivalent to the estimated term of the license. The Company estimates the term of a 
development and commercialization license to be approximately 25 years, which reflects management’s estimate of the 
time necessary to develop and commercialize therapeutic products pursuant to the license plus the estimated royalty 
term. The Company will reassess the estimated term at each subsequent reporting period. Upon execution of two 
development and commercialization licenses taken by Lilly in December 2014, the Company recognized as license 
revenue the remaining $15.6 million of arrangement consideration allocated to the development and commercialization 
licenses, which is included in license and milestone fee revenue for the year ended June 30, 2015. The Company will 
recognize research services revenue and revenue from the delivery of cytotoxic agents as the related services and 
cytotoxic agents are delivered. 

82 

Costs directly attributable to the Lilly collaborative agreement are comprised of compensation and benefits 
related to employees who provided research and development services on behalf of Lilly as well as costs of clinical 
materials sold. Indirect costs are not identified to individual collaborators. The costs related to the research and 
development services amounted to approximately $182,000, $499,000 and $1.2 million for fiscal years 2016, 2015 and 
2014 respectively. The costs related to clinical materials sold were approximately $1.1 million, $1.1 million and $26,000 
for fiscal years 2016, 2015 and 2014, respectively. 

CytomX 

In January 2014, the Company entered into a reciprocal right-to-test agreement with CytomX Therapeutics, Inc. 

(CytomX). The agreement provides CytomX and the Company with the right to test the Company's ADC technology 
with CytomX masked antibodies, which it calls Probodies™, to create product candidates for a specified number of 
targets. Each company has defined rights to test the other company’s technology with its technology under a right-to-
test, or research, license, and to subsequently take an exclusive, worldwide license to use the other company’s 
technology with its technology to develop and commercialize products for the specified targets on terms agreed upon at 
the inception of the right-to-test agreement. The Company received no upfront cash payment in connection with the 
execution of the right-to-test agreement. The terms of the right-to-test agreement require the Company and CytomX to 
each take its respective development and commercialization licenses by the end of the term of the research licenses. In 
addition, both the Company and CytomX are required to perform specific research activities under the right-to-test 
agreement on behalf of the other party for no monetary consideration. 

In February 2016, CytomX took its development and commercialization license for a specified target. An 

amendment of the agreement executed simultaneously with that license granted CytomX the right, for a specified period 
of time, to substitute the specified target with another as yet unspecified target. Accordingly, the revenue associated with 
this license is being deferred until the expiration of that substitution right. With respect to the development and 
commercialization license taken by CytomX, the Company is entitled to receive up to a total of $160 million in 
milestone payments plus royalties on the commercial sales of any resulting product. The total milestones are categorized 
as follows: development milestones—$10 million; regulatory milestones—$50 million; and sales milestones—
$100 million. Assuming no annual maintenance fee is payable as described below, the next payment the Company could 
receive would be a $1 million development milestone payment with commencement of a Phase I clinical trial. At the 
time of execution of the right-to-test agreement, there was significant uncertainty as to whether the milestone related to 
the Phase I clinical trial would be achieved. In consideration of this, as well as the Company’s expected involvement in 
the research and manufacturing of any product candidate, this milestone was deemed substantive. CytomX is responsible 
for the manufacturing, product development and marketing of any PDC resulting from the development and 
commercialization license taken by CytomX under this collaboration. 

With respect to any development and commercialization license that may be taken by the Company, the 
Company will potentially be required to pay up to a total of $80 million in milestone payments per license, plus royalties 
on the commercial sales of any resulting product. The total milestones per license are categorized as follows: 
development milestones—$7 million; regulatory milestones—$23 million; and sales milestones—$50 million. Assuming 
no annual maintenance fee is payable as described below, the next payment the Company could be required to make is a 
$1 million development milestone payment with commencement of a Phase I clinical trial. The Company is responsible 
for the manufacturing, product development and marketing of any PDC resulting from any development and 
commercialization license taken by the Company under this collaboration. 

In addition, each party may be liable to pay annual maintenance fees to the other party if the licensed PDC 
product candidate covered under each development and commercialization license has not progressed to a specified 
stage of development within a specified time frame. 

The arrangement was accounted for based on the fair value of the items exchanged. The items to be delivered to 

CytomX under the arrangement are accounted for under the Company’s revenue recognition policy. The items to be 
received from CytomX are recorded as research and development expenses as incurred. 

In accordance with ASC 605-25 (as amended by ASU No. 2009-13), the Company identified all of the 

deliverables at the inception of the right- to-test agreement. The significant deliverables were determined to be the 
right-to-test, or research, license, the exclusive development and commercialization license, rights to future 
technological improvements, and the research services. The research license in the right-to-test agreement was 
determined not to be substantive and, as a result, the exclusive development and commercialization license was 

83 

considered a deliverable at the inception of the right-to-test agreement. Factors that were considered in determining the 
research license was not substantive included (i) the overall objective of the agreement is for CytomX to obtain a 
development and commercialization license, (ii) there are no exercise fees payable upon taking the development and 
commercialization license, (iii) the limited economic benefit that CytomX could obtain from the right-to-test agreement 
unless CytomX was able to take the development and commercialization license, and (iv) the lack of economic penalties 
as a result of taking the license. 

The Company has determined that the research license from the Company to CytomX together with the 

development and commercialization license from the Company to CytomX represent one unit of accounting as the 
research license does not have stand-alone value from the development and commercialization license due to the lack of 
transferability of the research license and the limited economic benefit CytomX would derive if they did not obtain any 
development and commercialization license. The Company has also determined that this unit of accounting has 
stand-alone value from the rights to future technological improvements and the research services. The rights to future 
technological improvements and the research services are considered separate units of accounting as each of these was 
determined to have stand-alone value. The rights to future technological improvements have stand-alone value as 
CytomX would be able to use those items for their intended purpose without the undelivered elements. The research 
services have stand-alone value as similar services are sold separately by other vendors. 

The estimated selling price for the development and commercialization license is the Company’s best estimate 

of selling price and was determined based on market conditions, similar arrangements entered into by third parties, 
including pricing terms offered by the Company’s competitors for single-target development and commercialization 
licenses that utilize antibody-drug conjugate technology, and entity-specific factors such as the pricing terms of the 
Company’s previous single-target development and commercialization licenses, recent preclinical and clinical testing 
results of therapeutic products that use the Company’s ADC technology, and the Company’s pricing practices and 
pricing objectives. In order to determine the best estimate of selling price, the Company determined the overall value of 
a license by calculating a risk- adjusted net present value of a recent, comparable transaction the Company entered into 
with another collaborator. This overall value was then decreased by risk-adjusting the net present value of the contingent 
consideration (the milestones and royalties) payable by CytomX under the development and commercialization license. 
This amount represents the value that a third party would be willing to pay as an upfront payment for this license to the 
Company’s technology. 

The estimated selling price of the rights to technological improvements is the Company’s best estimate of 

selling price and was determined by estimating the probability that technological improvements will be made, and the 
probability that technological improvements made will be used by CytomX. In estimating these probabilities, the 
Company considered factors such as the technology that is the subject of the development and commercialization 
license, the Company’s history of making technological improvements, and when such improvements, if any, were likely 
to occur relative to the stage of development of the product candidate pursuant to the development and 
commercialization license. The Company’s estimate of probability considered the likely period of time that any 
improvements would be utilized, which was estimated to be ten years following delivery of the commercialization and 
development license. The value of any technological improvements made available after this ten year period was 
considered to be de minimis due to the significant additional costs that would be incurred to incorporate such technology 
into any existing product candidate. The estimate of probability was multiplied by the estimated selling price of the 
development and commercialization license and the resulting cash flow was discounted at a rate of 13%, representing the 
Company’s estimate of its cost of capital at the time. 

The estimated selling price of the research services was based on third-party evidence given the nature of the 

research services to be performed for CytomX and market rates for similar services. 

The total allocable consideration of $13.1 million (which comprises the $13.0 million that a third party would 

be willing to pay as an upfront payment for this license to the Company’s technology plus $140,000 for the fair value of 
fees for the research services to be provided) was allocated to the deliverables based on the relative selling price method 
as follows: $12.7 million to the development and commercialization license; $350,000 to the rights to future 
technological improvements and $140,000 to the research services. The Company will recognize as license revenue the 
amount of the total allocable consideration allocated to the development and commercialization license when the 
substitution right under the license expires, as discussed previously above. At that time, the amount of the total allocable 
consideration allocated to future technological improvements will commence to be recognized as revenue ratably over 
the period the Company is obligated to make available any technological improvements, which is the equivalent to the 
estimated term of the license. The Company estimates the term of a development and commercialization license to be 

84 

approximately 25 years, which reflects management’s estimate of the time necessary to develop and commercialize 
therapeutic products pursuant to the license plus the estimated royalty term. The Company will be required to reassess 
the estimated term at each subsequent reporting period.  

No license fee revenue has been recognized related to this agreement through June 30, 2016 as the research 

license was not considered to be substantive and a non-substitutable development and commercialization license had not 
been delivered at this time. The period for CytomX to exercise its substitution right expires in January 2017. 
Accordingly, the $12.7 million allocated to the development and commercialization license is included in short-term 
deferred revenue as of June 30, 2016. The Company will recognize research services revenue as the related services are 
delivered. 

The $13.1 million of total allocable consideration to be accounted for as revenue described above is also the 

amount that was used to account for the expense of the licenses and research services the Company received or will 
receive from CytomX. Based on an estimate of the research services that CytomX will be providing to the Company for 
no monetary consideration, $310,000 was allocated to such services and will be expensed over the period the services 
are provided. The balance of $12.8 million pertains to technology rights received and these amounts have been charged 
to research and development expense during the year ended June 30, 2014 upon execution of the research agreement. 

Costs directly attributable to the CytomX collaborative agreement are comprised of compensation and benefits 

related to employees who provided research and development services on behalf of CytomX. Indirect costs are not 
identified to individual collaborators. The costs related to the research and development services amounted to 
approximately $868,000 and $130,000 for fiscal years 2016 and 2015, respectively. There were no similar costs recorded 
in fiscal year 2014. 

Takeda 

In March 2015, the Company entered into a right-to-test agreement with Takeda Pharmaceutical Company 
Limited (Takeda) through its wholly owned subsidiary, Millennium Pharmaceuticals, Inc. The agreement provides 
Takeda with the right to (a) take exclusive options, with certain restrictions, to individual targets selected by Takeda for 
specified option periods, (b) test the Company’s ADC technology with Takeda’s antibodies directed to the targets 
optioned under a right-to-test, or research, license, and (c) take exclusive licenses to use the Company’s ADC 
technology to develop and commercialize products to targets optioned for up to two individual targets on terms specified 
in the right-to-test agreement. Takeda must exercise its options for the development and commercialization licenses by 
the end of the three-year term of the right-to-test agreement, after which any then outstanding options will lapse. Takeda 
has the right to extend the three-year right-to-test period for one additional year by payment to the Company of $4 
million. Alternatively, Takeda has the right to expand the scope of the right-to-test agreement by payment to the 
Company of $8 million. If Takeda opts to expand the scope of the right-to-test agreement, it will be entitled to take 
additional exclusive options, one of which may be exercised for an additional development and commercialization 
license, and the right-to test period will be extended until the fifth anniversary of the effective date of the right-to-test 
agreement. Takeda is responsible for the manufacturing, product development and marketing of any products resulting 
from this collaboration. 

The Company received a $20 million upfront payment in connection with the execution of the right-to-test 

agreement and, for each development and commercialization license taken, is entitled to receive up to a total of $210 
million in milestone payments, plus royalties on the commercial sales of any resulting products. The total milestones are 
categorized as follows: development milestones—$30 million; regulatory milestones—$85 million; and sales 
milestones—$95 million. The first potential milestone the Company will be entitled to receive will be a $5 million 
development milestone payment with the initiation of a Phase I clinical trial under the first development and 
commercialization license taken. At the time of execution of this agreement, there was significant uncertainty as to 
whether the milestone related to initiation of a Phase I clinical trial under the first development and commercialization 
license would be achieved. In consideration of this, as well as the Company’s expected involvement in the research and 
manufacturing of these product candidates, this milestone was deemed substantive. The Company also is entitled to 
receive payments for delivery of cytotoxic agents to Takeda and research and development activities performed on 
behalf of Takeda.  

In accordance with ASC 605-25 (as amended by ASU No. 2009-13), the Company identified all of the 
deliverables at the inception of the right-to-test agreement. The significant deliverables were determined to be the right-
to-test, or research, license, the two exclusive development and commercialization licenses, rights to future technological 

85 

improvements, the development and commercialization license contained in the option to expand the agreement and the 
research services. The options to obtain two development and commercialization licenses in the right-to-test agreement 
were determined not to be substantive and, as a result, the exclusive development and commercialization licenses were 
considered deliverables at the inception of the right-to-test agreement. Factors that were considered in determining the 
options were not substantive included (i) the overall objective of the agreement was for Takeda to obtain development 
and commercialization licenses, (ii) no additional consideration required for each development and commercialization 
license taken beyond the $20 million upfront payment that was due at the inception of the right-to-test agreement, (iii) 
the limited economic benefit that Takeda could obtain from the right-to-test agreement unless it exercised its options to 
obtain development and commercialization licenses, and (iv) the lack of economic penalties as a result of exercising the 
options.  

The option to expand the scope of the right-to-test agreement and obtain, among other deliverables, a third 

development and commercialization license was not determined to be substantive and, as a result, the third development 
and commercialization license was considered a deliverable at the inception of the right-to-test agreement. Factors that 
were considered in determining this option was not substantive included (i) the overall objective of the agreement was 
for Takeda to obtain development and commercialization licenses and (ii) the relative size of the $8 million option 
payment in exchange for this third development and commercialization license and two year extension of the right-to-
test period when compared to the $20 million upfront payment in exchange for, among other deliverables, two 
development and commercialization licenses and the separate ability to extend the right-to-test period for one year in 
exchange for a $4 million payment. 

The Company has determined that the research license together with the development and commercialization 
licenses represent one unit of accounting as the research license does not have stand-alone value from the development 
and commercialization licenses due to the lack of transferability of the research license and the limited economic benefit 
Takeda would derive if they did not obtain any development and commercialization licenses. The Company has also 
determined that this unit of accounting has stand-alone value from the rights to future technological improvements, the 
license contained in the option to expand the agreement and the research services. The license contained in the option to 
expand the agreement has stand-alone value as it would result in an additional license with which Takeda would derive 
economic benefit. The rights to future technological improvements have stand-alone value as Takeda would be able to 
use those items for their intended purpose without the undelivered elements. The research services have stand-alone 
value as similar services are sold separately by other vendors. 

The estimated selling prices for the development and commercialization licenses are the Company’s best 

estimate of selling price and were determined based on market conditions, similar arrangements entered into by third 
parties, including pricing terms offered by our competitors for single-target development and commercialization licenses 
that utilize antibody-drug conjugate technology, and entity-specific factors such as the pricing terms of the Company’s 
previous single-target development and commercialization licenses, recent preclinical and clinical testing results of 
therapeutic products that use the Company’s ADC technology, and the Company’s pricing practices and pricing 
objectives. The estimated selling price of the rights to technological improvements is the Company’s best estimate of 
selling price and was determined by estimating the probability that technological improvements will be made, and the 
probability that technological improvements made will be used by Takeda. In estimating these probabilities, the 
Company considered factors such as the technology that is the subject of the development and commercialization 
licenses, our history of making technological improvements, and when such improvements, if any, were likely to occur 
relative to the stage of development of any product candidates pursuant to the development and commercialization 
licenses. The Company’s estimate of probability considered the likely period of time that any improvements would be 
utilized, which was estimated to be ten years following delivery of a commercialization and development license. The 
value of any technological improvements made available after this ten year period was considered to be de minimis due 
to the significant additional costs that would be incurred to incorporate such technology into any existing product 
candidates. The estimate of probability was multiplied by the estimated selling price of the development and 
commercialization licenses and the resulting cash flow was discounted at a rate of 13%, representing the Company’s 
estimate of its cost of capital at the time. The estimated selling price of the research services was based on third-party 
evidence given the nature of the research services to be performed for Takeda and market rates for similar services. 

The total arrangement consideration of $31.4 million (which comprises the $20 million upfront payment, the $8 
million payment to expand the agreement and the expected fees for the research services to be provided) was allocated to 
the deliverables based on the relative selling price method as follows: $25.9 million to the three development and 
commercialization licenses; $2.1 million to the rights to future technological improvements; and $3.4 million to the 
research services. The first license was taken by Takeda in December 2015, and as a result, the Company recognized 

86 

$8.6 million of the $25.9 million of arrangement consideration allocated to the development and commercialization 
licenses, which is included in license and milestone fee revenue for the year ended June 30, 2016. With this first 
development and commercialization license taken, the amount of the total arrangement consideration allocated to future 
technological improvements will commence to be recognized as revenue ratably over the period the Company is 
obligated to make available any technological improvements, which is the equivalent to the estimated term of the 
license. The Company estimates the term of a development and commercialization license to be approximately 25 years, 
which reflects management’s estimate of the time necessary to develop and commercialize therapeutic products pursuant 
to the license plus the estimated royalty term. The Company will reassess the estimated term at each subsequent 
reporting period. The Company will recognize as license revenue an equal amount of the total remaining $17.3 million 
of arrangement consideration allocated to the development and commercialization licenses as each individual license is 
delivered to Takeda upon Takeda’s exercise of its remaining options to such licenses. The Company does not control 
when Takeda will exercise its options for development and commercialization licenses. As a result, the Company cannot 
predict when it will recognize the related license revenue except that it will be within the term of the research license. 
The Company will recognize research services revenue as the related services are delivered. 

Costs directly attributable to the Takeda collaborative agreement are comprised of compensation and benefits 

related to employees who provided research and development services on behalf of Takeda. Indirect costs are not 
identified to individual collaborators. The costs related to the research and development services amounted to 
approximately $469,000 and $113,000 for fiscal years 2016 and 2015, respectively. There were no similar costs recorded 
in fiscal year 2014. 

Other Collaborative Agreements 

In December 2004, the Company entered into a development and license agreement with a predecessor to 

Janssen Biotech (formerly known as Centocor), a wholly owned subsidiary of Johnson & Johnson. Under the terms of 
this agreement, Janssen was granted exclusive worldwide rights to develop and commercialize anticancer therapeutics 
that consist of the Company’s maytansinoid cell- killing agent attached to an (cid:302)v integrin-targeting antibody that was 
developed by Janssen. Per notice to the Company, effective July 2014, Janssen relinquished its rights to the target. 
Accordingly, the Company recognized the remaining $241,000 of the $1 million upfront fee received from Janssen upon 
execution of the 2004 license agreement and is included in license and milestone fee revenue for the fiscal year ended 
June 30, 2015. 

D.       Property and Equipment 

Property and equipment consisted of the following at June 30, 2016 and 2015 (in thousands): 

June 30,  

2016 

2015 

Leasehold improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      $  34,743     $  32,355
    18,398
Machinery and equipment  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
 6,897
Computer hardware and software  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
 3,290
Furniture and fixtures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
 2,361
Assets under construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
  $  73,307   $  63,301
   (47,047)
Less accumulated depreciation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
Property and equipment, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    $  22,704   $  16,254

 24,324  
 8,277  
 3,636  
 2,327  

   (50,603) 

Depreciation expense was approximately $5.3 million, $5.5 million and $4.6 million for each of the years ended 

June 30, 2016, 2015 and 2014, respectively. Included in the table above, the Company’s investment in equipment under 
capital leases was $876,000, net of accumulated amortization of $414,000, at June 30, 2016 and $724,000, net of 
accumulated amortization of $190,000, at June 30, 2015. 

E.       Convertible 4.5% Senior Notes 

In June 2016, the Company issued Convertible 4.5% Senior Notes with an aggregate principal amount of $100 

million. The Company received net proceeds of approximately $96.6 million from the sale of the Convertible Notes, 
after deducting fees and expenses of approximately $3.4 million. 

87 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
 
 
The Convertible Notes are governed by the terms of an indenture between the Company, as issuer, and 
Wilmington Trust, National Association, as the trustee. The Convertible Notes are senior unsecured obligations and bear 
interest at a rate of 4.5% per year, payable semi-annually in arrears on January 1 and July 1 of each year, commencing 
on January 1, 2017. The Company recorded approximately $138,000 of interest expense for the year ended June 30, 
2016 which is included in other (expense) income, net in the consolidated statements of operations. The Convertible 
Notes will mature on July 1, 2021, unless earlier repurchased or converted. Holders may convert their notes at their 
option at any time prior to the close of business on the business day immediately preceding the stated maturity date. 
Upon conversion, the Company will deliver for each $1,000 principal amount of converted notes a number of shares 
equally to the conversion rate, which will initially be 238.7775 shares of common stock, equivalent to an initial 
conversion price of approximately $4.19. The conversion rate will be subject to adjustment in some circumstances, but 
will not be adjusted for any accrued and unpaid interest. In addition, if a “make-whole fundamental change” (as defined 
in the offering memorandum) occurs prior to the stated maturity date, the Company will increase the conversion rate for 
a holder who elects to convert its notes in connection with such make-whole fundamental change in certain 
circumstances. If the Company undergoes a fundamental change, subject to certain conditions, holders may require the 
Company to repurchase for cash all or part of their notes at a purchase price equal to 100% of the principal amount of the 
notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change purchase date. In 
addition, upon an event of default, the holders may require the Company to repurchase for cash all of their notes at a 
purchase price equal to 100% of the principal amount, plus accrued and unpaid interest. Upon bankruptcy, this becomes 
an automatic repurchase obligation. Also, if the Company fails to comply with certain reporting requirements as 
described in the indenture it will constitute an event of default, however the Company may elect to pay additional 
interest at an annual rate equal to 0.5% of the principal amount for the 90 days following such event as a remedy for the 
default. Subsequent to the 90 days, if still in default, the principal amount of the notes and accrued interest may become 
immediately due and payable. If a “restricted event” occurs as described in the indenture that causes the notes not to 
become freely tradable by holders other than our affiliates after the first anniversary of the original issuance date of the 
notes, the Company would also become obligated to pay additional interest at an annual rate equal to 0.5% of the 
principal amount. The combined additional interest rate under these two circumstances, however, cannot exceed 0.5%. 

The Company analyzed the terms of the Convertible Notes and determined that under current accounting 

guidance the notes would be entirely accounted for as debt and none of the terms of the notes require separate 
accounting. As part of the issuance of the Convertible Notes, the Company incurred $3.4 million of transaction costs, 
which are capitalized in the accompanying consolidated balance sheet as deferred financing costs and will be amortized 
to interest expense ratably over the term of the Convertible Notes. 

F.       Liability Related to Sale of Future Royalties 

In April 2015, IRH purchased the right to receive 100% of the royalty payments on commercial sales of 
Kadcyla arising under the Company’s development and commercialization license with Genentech, until IRH has 
received aggregate royalties equal to $235 million or $260 million, depending on when the aggregate royalties received 
by IRH reach a specified milestone. Once the applicable threshold is met, if ever, the Company will thereafter receive 
85% and IRH will receive 15% of the Kadcyla royalties for the remaining royalty term. At consummation of the 
transaction in April 2015, the Company received cash proceeds of $200 million. As part of this sale, the Company 
incurred $5.9 million of transaction costs, which are capitalized in the accompanying consolidated balance sheet as 
deferred financing costs and will be amortized to interest expense over the estimated life of the royalty purchase 
agreement. Although the Company sold its rights to receive royalties from the sales of Kadcyla, as a result of its ongoing 
involvement in the cash flows related to these royalties, the Company will continue to account for these royalties as 
revenue and recorded the $200 million in proceeds from this transaction as a liability related to sale of future royalties 
(Royalty Obligation) that will be amortized using the interest method over the estimated life of the royalty purchase 
agreement. 

88 

 
 
 
The following table shows the activity within the liability account during the year ended June 30, 2016 (in 

thousands): 

Year  

  Period from  

ended 

  inception to   

  June 30,  

June 30,    

2016 

2016 

Liability related to sale of future royalties — beginning balance . . . . . . . $  199,662  $ 

 —

Proceeds from sale of future royalties . . . . . . . . . . . . . . . . . . . . . . . . . .

 — 

   200,000

Non-cash Kadcyla royalty revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    (25,299)

    (30,783)

Non-cash interest expense recognized . . . . . . . . . . . . . . . . . . . . . . . . . .

 19,009 

 24,155

Liability related to sale of future royalties — ending balance . . . . . . . . . $  193,372  $  193,372

As royalties are remitted to IRH, the balance of the Royalty Obligation will be effectively repaid over the life of 
the agreement. In order to determine the amortization of the Royalty Obligation, the Company is required to estimate the 
total amount of future royalty payments to be received and remitted to IRH as noted above over the life of the 
agreement. The sum of these amounts less the $200 million proceeds the Company received will be recorded as interest 
expense over the life of the Royalty Obligation. Since inception, the Company’s  estimate of this total interest expense 
resulted in an effective annual interest rate of approximately 9.6%. The Company periodically assesses the estimated 
royalty payments to IRH and to the extent such payments are greater or less than its initial estimates, or the timing of 
such payments is materially different than its original estimates, the Company will prospectively adjust the amortization 
of the Royalty Obligation. There are a number of factors that could materially affect the amount and timing of royalty 
payments from Genentech, most of which are not within the Company’s control. Such factors include, but are not limited 
to, changing standards of care, the introduction of competing products, manufacturing or other delays, biosimilar 
competition, patent protection, adverse events that result in governmental health authority imposed restrictions on the 
use of the drug products, significant changes in foreign exchange rates as the royalties remitted to IRH are made in U.S. 
dollars (USD) while significant portions of the underlying sales of Kadcyla are made in currencies other than USD, and 
other events or circumstances that could result in reduced royalty payments from Kadcyla, all of which would result in a 
reduction of non-cash royalty revenues and the non-cash interest expense over the life of the Royalty Obligation. 
Conversely, if sales of Kadcyla are more than expected, the non-cash royalty revenues and the non-cash interest expense 
recorded by the Company would be greater over the term of the Royalty Obligation. 

In addition, the royalty purchase agreement grants IRH the right to receive certain reports and other information 
relating to the royalties and contains other representations and warranties, covenants and indemnification obligations that 
are customary for a transaction of this nature. 

89 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
    
 
  
 
 
 
G.       Income Taxes 

The difference between the Company’s expected tax benefit, as computed by applying the U.S. federal 
corporate tax rate of 34% to loss before the benefit for income taxes, and actual tax is reconciled in the following chart 
(in thousands): 

Year Ended June 30,  
2015 

2016 

2014 

Loss before income tax expense  . . . . . . . . . . . . . . . . . . .      $ (144,817)    $ (60,739)    $ (71,364)
Expected tax benefit at 34% . . . . . . . . . . . . . . . . . . . . . . .     $  (49,238)  $ (20,651)  $ (24,264)
 215
Permanent differences. . . . . . . . . . . . . . . . . . . . . . . . . . . .   
Incentive stock options . . . . . . . . . . . . . . . . . . . . . . . . . . .   
 1,738
    (4,062)
State tax benefit net of federal benefit . . . . . . . . . . . . . . .   
    26,011
Increase in valuation allowance, net  . . . . . . . . . . . . . . . .   
    (1,002)
Federal research credit . . . . . . . . . . . . . . . . . . . . . . . . . . .   
 —
Federal orphan drug credit . . . . . . . . . . . . . . . . . . . . . . . .   
 1,364
Expired loss and credit carryforwards . . . . . . . . . . . . . . .   
 —
Other  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   
 —
Benefit for income taxes . . . . . . . . . . . . . . . . . . . . . . . . . .    $

 818   
 1,948   
 (3,252) 
 27,940   
 (1,407) 
 (5,471) 
 75   
 —   
 —    $

 345  
 2,501  
 (7,954) 
 62,505  
 (4,109) 
 (4,241) 
 184  
 7  
 —   $

At June 30, 2016, the Company has net operating loss, or NOL, carryforwards of approximately $377.9 million 

available to reduce federal taxable income, if any, that expire in 2028 through 2036 and $214.0 million available to 
reduce state taxable income, if any, that expire in fiscal 2033 through fiscal 2036. Included in the federal and state 
carryforwards is $27.0 million and $20.5 million, respectively, related to deductions from the exercise of stock options 
and the related tax benefit which will result in an increase in additional paid-in capital if and when realized through a 
reduction of taxes paid in cash. The Company also has federal and state credit carryforwards of approximately 
$40.4 million available to offset federal and state income taxes, which expire beginning in 2017. Due to the degree of 
uncertainty related to the ultimate use of the loss carryforwards and tax credits, the Company has established a valuation 
allowance to fully reserve these tax benefits. 

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of 

assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant 
components of the Company’s deferred tax assets and liabilities as of June 30, 2016 and 2015 are as follows (in 
thousands): 

June 30,  

2016 

2015 

Deferred tax assets: 

Net operating loss carryforwards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $   139,791    $  89,362
 25,131
Research and development tax credit carryforwards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
 2,532
Property and other intangible assets  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
 16,179
Deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
 11,379
Stock-based compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
 4,279
Deferred lease incentive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
 3,177
Other liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
 78,427
Royalty sale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Total deferred tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $   292,047    $  230,466

 36,879   
 2,395   
 12,911   
 16,033   
 4,356   
 3,726   
 75,956   

Deferred tax liabilities: 

Accounting method change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Royalty sale transaction costs  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Total deferred tax liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $ 
Valuation allowance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Net deferred tax assets/(liabilities) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   $ 

 (492) 
 (1,757) 
 (2,249)  $

   (289,798) 

 —    $

 (983)
 (2,190)
 (3,173)
   (227,293)
 —

The Company has evaluated the positive and negative evidence bearing upon the realizability of its deferred tax 

assets. As required by the provisions of ASC 740, the Company has determined that it is not more-likely-than-not that 
the tax benefits related to the federal and state deferred tax assets will be realized for financial reporting purposes. 

90 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
      
 
     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Accordingly, the deferred tax assets have been fully reserved at June 30, 2016 and 2015. The valuation allowance 
increased by $62.5 million during 2016 due primarily to additional net loss incurred during the year and additional 
research and development tax credits earned during the year, partially offset by the expiration of net operating loss 
carryforwards. 

Utilization of the NOL and credit carryforwards may be subject to a substantial annual limitation due to 
ownership change limitations that have occurred previously or that could occur in the future as provided by Section 382 
of the Internal Revenue Code of 1986, as well as similar state and foreign provisions. These ownership changes may 
limit the amount of NOL and credit carry forwards that can be utilized annually to offset future taxable income and tax, 
respectively. In general, an ownership change, as defined by Section 382, results from transactions increasing the 
ownership of certain shareholders or public groups in the stock of a corporation by more than 50 percentage points over 
a three-year period. Since the Company’s formation, it has raised capital through the issuance of capital stock on several 
occasions (both pre and post initial public offering) which, combined with the purchasing shareholders’ subsequent 
disposition of those shares, may have resulted in a change of control, as defined by Section 382, or could result in a 
change of control in the future upon subsequent disposition. During fiscal year 2015, the Company completed a study to 
assess whether a change of control has occurred or whether there have been multiple changes of control since its 
formation and determined no ownership change occurred under Section 382. The study has not been updated for fiscal 
year 2016. Additionally, the Company has not completed a Research and Development Credit Study; accordingly, it is 
probable that a portion of the tax credit carryforward may not be available to offset future income.  

The Company accounts for uncertain tax positions under the recognition and measurement criteria of ASC 740-
10. For those tax positions for which it is more likely than not that a tax benefit will be sustained, the Company records 
the largest amount of tax benefit with a greater than 50% likelihood of being realized upon settlement with a taxing 
authority that has full knowledge of all relevant information. If the Company does not believe that it is not more likely 
than not that a tax benefit will be sustained, no tax benefit is recognized. As of June 30, 2016 and 2015, no uncertain tax 
positions have been recorded. Interest and penalties related to the settlement of uncertain tax positions, if any, will be 
reflected in income tax expense. The Company did not recognize any interest and penalties associated with unrecognized 
tax benefits in the accompanying consolidated financial statements. The Company does not expect any material changes 
to the unrecognized benefits within 12 months of the reporting date. Due to existence of the valuation allowance, future 
changes in the Company’s unrecognized tax benefits will not impact our effective tax rate.  

The statute of limitations for assessment by the Internal Revenue Service, or IRS, and state tax authorities is 
open for tax years ending June 30, 2013, 2014, 2015 and 2016, although carryforward attributes that were generated 
prior to fiscal year 2013 may still be adjusted upon examination by the IRS or state tax authorities if they either have 
been or will be used in a future period.  

H.       Capital Stock 

Common Stock Reserved 

At June 30, 2016, the Company has reserved 15.5 million shares of authorized common stock for the future 
issuance of shares under the 2006 Plan and the 2004 Director Plan. See “Stock-Based Compensation” in Note B for a 
description of the 2006 Plan and the Former Plan and below for a description of the 2004 Director Plan. 

Stock Options 

As of June 30, 2016, the 2006 Plan was the only employee share-based compensation plan of the Company. 

During the year ended June 30, 2016, holders of options issued under the 2006 Plan and the Former Plan exercised their 
rights to acquire an aggregate of 555,000 shares of common stock at prices ranging from $3.19 to $17.00 per share. The 
total proceeds to the Company from these option exercises were approximately $5.2 million. 

91 

 
The Company granted options with an exercise price equal to the fair market value of the common stock on the 

date of such grant. The following options and their respective weighted- average exercise prices per share were 
exercisable at June 30, 2016, 2015 and 2014: 

June 30, 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
June 30, 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
June 30, 2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    

(in thousands)   Exercise Price 
12.63
 11.89
 9.79

 6,453   $ 
 5,380   $ 
 4,637   $ 

  Exercisable   

     Weighted(cid:827)   
Average 

2001 Non-Employee Director Stock Plan 

In November 2001, the Company’s shareholders approved the establishment of the 2001 Non-Employee 

Director Stock Plan, or the 2001 Director Plan, and 50,000 shares of common stock to be reserved for grant thereunder. 
The 2001 Director Plan provided for the granting of awards to Non-Employee Directors and, at the election of 
Non-Employee Directors, to have all or a portion of their awards in the form of cash, stock, or stock units. All stock or 
stock units are immediately vested. The number of stock or stock units issued was determined by the market value of the 
Company’s common stock on the last date of the Company’s fiscal quarter for which the services are rendered. The 2001 
Director Plan was administered by the Board of Directors which was authorized to interpret the provisions of the 2001 
Director Plan, determine which Non-Employee Directors would be granted awards, and determine the number of shares 
of stock for which a stock right will be granted. The 2001 Director Plan was replaced in 2004 by the 2004 
Non-Employee Director Compensation and Deferred Share Unit Plan. 

During the years ended June 30, 2016, 2015 and 2014, the Company recorded approximately $(72,000), 
$16,000, and $(30,000) in (expense reduction) compensation expense, respectively, related to approximately 6,000 stock 
units outstanding under the 2001 Director Plan. The value of the stock units is adjusted to market value at each reporting 
period. No stock units have been issued under the 2001 Plan subsequent to June 30, 2004.  

2004 Non-Employee Director Compensation and Deferred Share Unit Plan 

In June 2004, the Board of Directors approved the establishment of the 2004 Non-Employee Director 

Compensation and Deferred Share Unit Plan, or the 2004 Director Plan. The 2004 Director Plan provided for the 
compensation of Non-Employee Directors, awarding their annual retainers in the form of deferred share units, and, at 
their discretion, to have all or a portion of their other compensation such as meeting fees in the form of cash or deferred 
share units. The deferred share units for annual retainers vested one-twelfth monthly over the next year after the award; 
other deferred share units vested immediately upon issuance. The number of deferred share units issued was determined 
by the market value of the Company’s common stock on the last date of the Company’s fiscal year prior to the fiscal 
year for which services were rendered. The deferred share units were to be paid out in cash to each non-employee 
director based upon the market value of the Company’s common stock on the date of such director’s retirement from the 
Board of Directors of the Company. The 2004 Director Plan was administered by the Board of Directors. 

The 2004 Director Plan was amended on September 5, 2006. Under the terms of the amended 2004 Director 

Plan, the redemption amount of deferred share units will be paid in shares of common stock of the Company under the 
2006 Plan in lieu of cash. As a result of the change in payout structure, the value of the vested awards was transferred to 
additional paid-in capital as of the modification date and the total value of the awards, as calculated on the modification 
date, was expensed over the remainder of the vesting period. Accordingly, the value of the share units is fixed and will 
no longer be adjusted to market value at each reporting period. In addition, the amended 2004 Director Plan changed the 
vesting for annual retainers to take place quarterly over the three years after the award and the number of deferred share 
units awarded for all compensation is now based on the market value of the Company’s common stock on the date of the 
award. 

Compensation Policy for Non-Employee Directors 

On September 16, 2009, the Board adopted a new Compensation Policy for Non-Employee Directors, which 

superseded the 2004 Plan and made certain changes to the compensation of its non-employee directors. The policy was 
amended on November 11, 2009 to provide that, whenever the Board has a non-employee Chairman in lieu of a Lead 
Director, the cash payment for the non-employee Chairman of the Board shall be the same as the cash compensation that 
would otherwise have been payable to the Lead Director. Effective November 12, 2009, non-employee directors became 
entitled to receive annual meeting fees and committee fees under the new policy. The new policy made changes to the 

92 

 
 
 
 
 
    
 
 
 
 
 
equity portion of the non-employee director compensation, but left the cash portion unchanged. Effective November 11, 
2009, non-employee directors became entitled to receive deferred stock units under the new policy as follows: 

•  New non-employee directors will be initially awarded a number of deferred stock units having an aggregate 

market value of $65,000, based on the closing price of our common stock on the date of their initial 
election to the Board. These awards will vest quarterly over three years from the date of grant, contingent 
upon the individual remaining a director of ImmunoGen as of each vesting date. 

•  On the first anniversary of a non-employee director’s initial election to the Board, such non-employee 

director will be awarded a number of deferred stock units having an aggregate market value of $30,000, 
based on the closing price of our common stock on such date of grant and pro-rated based on the number of 
whole months remaining between the first day of the month in which such grant date occurs and the first 
October 31 following the grant date. These awards will generally vest quarterly over approximately the 
period from the grant date to the first November 1 following the grant date, contingent upon the individual 
remaining a director of ImmunoGen as of each vesting date. 

•  Thereafter, non-employee directors in general will be annually awarded a number of deferred stock units 
having an aggregate market value of $30,000, based on the closing price of our common stock on the date 
of our annual meeting of shareholders. These awards will vest quarterly over approximately one year from 
the date of grant, contingent upon the individual remaining a director of ImmunoGen as of each vesting 
date. 

As with the 2004 Plan, vested deferred stock units are redeemed on the date a director ceases to be a member of 
the Board, at which time such director’s deferred stock units will be settled in shares of our common stock issued under 
our 2006 Plan at a rate of one share for each vested deferred stock unit then held. Any deferred stock units that remain 
unvested at that time will be forfeited. The new policy provides that all unvested deferred stock units will automatically 
vest immediately prior to the occurrence of a change of control, as defined in the 2006 Plan. Pursuant to the 
Compensation Policy for Non- Employee Directors, the Company issued a retiring director 43,615 shares of common 
stock in November 2013. 

In connection with the adoption of the new compensation policy, the Board also amended the 2004 Plan as 

follows: 

•  All unvested deferred stock awards (other than any unvested initial awards) were vested in full on 

September 16, 2009 unless the date such deferred stock units were credited to the non-employee director 
was less than one year prior to September 16, 2009, in which case such unvested deferred stock units will 
vest on the first anniversary of the date such deferred stock units were credited to the non-employee 
director. 

•  All unvested deferred stock awards will automatically vest immediately prior to the occurrence of a change 

of control. 

On September 22, 2010, the Board revised the Compensation Policy for Non-Employee Directors to provide 
that, in addition to the compensation they received previously, they would also become entitled to receive stock option 
awards having a grant date fair value of $30,000, determined using the Black- Scholes option pricing model measured on 
the date of grant, which would be the date of the annual meeting of shareholders. 

On November 12, 2013, the Board amended the Compensation Policy for Non-Employee Directors to make 

certain changes to the compensation of its non-employee directors, including an increase in the fees paid in cash to the 
non-employee directors. Under the terms of the amended policy, the redemption amount of deferred share units issued 
will continue to be paid in shares of common stock of the Company on the date a director ceases to be a member of the 
Board. Annual retainers vest quarterly over approximately one year from the date of grant, contingent upon the 
individual remaining a director of ImmunoGen as of each vesting date. The number of deferred share units awarded is 
now fixed per the plan on the date of the award and is no longer based on the market price of the Company’s common 
stock on the date of the award. All unvested deferred stock awards will automatically vest immediately prior to the 
occurrence of a change of control. 

In addition to the deferred share units, the Non-Employee Directors are now also entitled to receive a fixed 

number of stock options instead of a fixed grant date fair value of options, determined using the Black-Scholes option 

93 

pricing model measured on the date of grant, which would be the date of the annual meeting of shareholders. These 
options vest quarterly over approximately one year from the date of grant. Any new directors will receive a pro-rated 
award, depending on their date of election to the Board. The directors received a total of 80,000 options in each fiscal 
year ended 2016, 2015 and 2014, and the related compensation expense is included in the amounts discussed in the 
“Stock-Based Compensation” section of footnote B above. 

Pursuant to the Compensation Policy for Non-Employee Directors, as amended, the Company recorded 

approximately: 

• 

• 

• 

$380,000 in compensation expense during the year ended June 30, 2016 related to the grant of 41,000 
deferred share units and 12,000 deferred share units previously granted; 

$389,000 in compensation expense during the year ended June 30, 2015 related to the grant of 31,000 
deferred share units and 15,000 deferred share units previously granted; and 

$433,000 in compensation expense during the year ended June 30, 2014 related to the grant of 28,000 
deferred share units and 19,000 deferred share units previously granted. 

I.       Commitments and Contingencies 

Leases 

The Company currently has a lease agreement with CRP/King 830 Winter L.L.C. for the rental of 
approximately 110,000 square feet of laboratory and office space at 830 Winter Street, Waltham, MA through March 
2026. The Company uses this space for its corporate headquarters and other operations. The Company may extend the 
lease for two additional terms of five years. Pursuant to lease amendments executed in December 2013 and April 2014, 
the Company received construction allowances of approximately $746,000 and $1.1 million, respectively, to build out 
office and lab space to the Company’s specifications, and will receive up to $196,000 as a construction allowance 
pursuant to an amendment executed in December 2015. The Company is required to pay certain operating expenses for 
the leased premises subject to escalation charges for certain expense increases over a base amount.  

In February 2016, the Company entered into a lease agreement with PDM 930 Unit, LLC for the rental of 

10,281 square feet of additional office space at 930 Winter Street, Waltham, MA through August 31, 2021. The 
Company will receive up to approximately $617,000 as a construction allowance to build out the office space to the 
Company’s specifications. The Company is required to pay certain operating expenses for the leased premises based on 
its pro-rata share of such expenses for the entire rentable space of the building.  

The Company also leases 43,850 square feet of manufacturing and office space at 333 Providence Highway, 

Norwood, MA under an agreement through 2018 with an option to extend the lease for an additional term of five years. 
The Company is required to pay certain operating expenses for the leased premises subject to escalation charges for 
certain expense increases over a base amount. 

Effective April 2013, the Company entered into a lease agreement with River Ridge Limited Partnership for the 

rental of 7,507 square feet of additional office space at 100 River Ridge Drive, Norwood, MA. The initial term of the 
lease was for five years and two months commencing in July 2013 with an option for the Company to extend the lease 
for an additional term of five years. The Company is required to pay certain operating expenses for the leased premises 
subject to escalation charges for certain expense increases over a base amount. The Company entered into a sublease in 
December 2014 for this space, effective January 2015 through the remaining initial term of the lease. 

Facilities rent expense, net of sublease income, was approximately $6.5 million, $6.0 million and $5.4 million 

during fiscal years 2016, 2015 and 2014, respectively. 

94 

As of June 30, 2016, the minimum rental commitments, including real estate taxes and other expenses, for the 
next five fiscal years and thereafter under the non-cancelable operating lease agreements discussed above are as follows 
(in thousands): 

2017 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .       $   7,902   
 8,056   
2018 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 7,258   
2019 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 7,254   
2020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
2021 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 7,302   
   34,252   
Thereafter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
Total minimum lease payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     $  72,024   
Total minimum rental income from subleases  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    
 (250) 
Total minimum lease payments, net  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     $  71,774   

There are no obligations under capital leases as of June 30, 2016, as all of the capital leases were single 

payment obligations which have all been made. 

Collaborations and Licenses 

The Company is contractually obligated to make potential future success-based regulatory milestone payments 

in conjunction with certain collaborative agreements. These payments are contingent upon the occurrence of certain 
future events and, given the nature of these events, it is unclear when, if ever, the Company may be required to pay such 
amounts. Further, the timing of any future payment is not reasonably estimable. As of June 30, 2014, the maximum 
amount that may be payable in the future under the Company’s current collaborative agreements is $162 million, 
$1.4 million of which is reimbursable by a third party under a separate agreement. 

In addition, The Company is party to a license agreement covering the manufacture of the antibodies used in 

certain of product candidates which, under certain circumstances, requires periodic payments once the product reaches a 
specified stage of clinical development, and royalties on commercial sales of the product. The Company believes that the 
license agreement, by its terms, does not obligate it to make any further payments thereunder and accordingly, has not 
accrued a potential payment of £300,000 for one of its product candidates that has reached this stage. 

Litigation 

The Company is not party to any material litigation. 

J.       Employee Benefit Plans 

The Company has a deferred compensation plan under Section 401(k) of the Internal Revenue Code (the 401(k) 
Plan). Under the 401(k) Plan, eligible employees are permitted to contribute, subject to certain limitations, up to 100% of 
their gross salary and the Company’s matching contribution is 50% of the first 6% of the eligible employees’ 
contributions. In fiscal years 2016, 2015 and 2014, the Company’s contributions to the 401(k) Plan totaled 
approximately $1.1 million, $875,000, and $710,000, respectively. 

95 

 
 
 
 
  
  
  
  
  
 
 
K.       Quarterly Financial Information (Unaudited) 

Fiscal Year 2016 

First Quarter 
Ended 

Second Quarter    Third Quarter   Fourth Quarter 
Ended 

Ended 

Ended 
June 30, 2016  

  September 30, 2015  December 31, 2015  March 31, 2016  

(In thousands, except per share data) 

Revenues: 

License and milestone fees  . . . . . . . . . . . . . . . .     $
Royalty revenue . . . . . . . . . . . . . . . . . . . . . . . . .    
Non-cash royalty revenue related to the sale of 
future royalties . . . . . . . . . . . . . . . . . . . . . . . . . .    
Research and development support . . . . . . . . . .    
Clinical materials revenue . . . . . . . . . . . . . . . . .    
Total revenues . . . . . . . . . . . . . . . . . . . . . . . . .    

Expenses: 

Research and development  . . . . . . . . . . . . . . . .    
General and administrative  . . . . . . . . . . . . . . . .    
Total expenses . . . . . . . . . . . . . . . . . . . . . . . . .    
Loss from operations . . . . . . . . . . . . . . . . . . . . . . . .    
Non-cash interest expense on liability related to 
sale of future royalty and senior convertible notes   
Other income (expense), net . . . . . . . . . . . . . . .    
Net loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     $
Basic and diluted net loss per common share . .     $

 6,070   $
 —  

 10,692   $ 
 195  

 10,077    $
 —   

 5,684  
 772  
 2,325  
 14,851  

 35,132  
 8,329  
 43,461  
 (28,610) 

 6,291  
 848  
 3  
 18,029  

 38,199  
 8,054  
 46,253  
 (28,224) 

 7,380   
 1,059   
 1,198   
 19,714   

 36,094   
 11,235   
 47,329   
 (27,615) 

 (5,143) 
 13  
 (33,740)  $
(0.39)  $

 (5,059) 
 56  
 (33,227)  $ 
(0.38)  $ 

 (4,972) 
 659   
 (31,928)  $
(0.37)  $

 76
 —

 5,944
 1,335
 53
 7,408

 38,652
 9,298
 47,950
 (40,542)

 (4,956)
 (424)
 (45,922)
(0.53)

Fiscal Year 2015 

First Quarter 
Ended 

Second Quarter    Third Quarter   Fourth Quarter 
Ended 

Ended 

Ended 

  September 30, 2014    December 31, 2014    March 31, 2015      June 30, 2015  
(In thousands, except per share data) 

Revenues: 

License and milestone fees  . . . . . . . . . . . . . . . . .    $
Royalty revenue . . . . . . . . . . . . . . . . . . . . . . . . . .   
Non-cash royalty revenue related to the sale of 
future royalties . . . . . . . . . . . . . . . . . . . . . . . . . . .   
Research and development support . . . . . . . . . . .   
Clinical materials revenue . . . . . . . . . . . . . . . . . .   
Total revenues . . . . . . . . . . . . . . . . . . . . . . . . . .   

Expenses: 

Research and development  . . . . . . . . . . . . . . . . .   
General and administrative  . . . . . . . . . . . . . . . . .   
Total expenses . . . . . . . . . . . . . . . . . . . . . . . . . .   
(Loss) income from operations . . . . . . . . . . . . . . . . .   
Non-cash interest expense on liability related to 
sale of future royalty  . . . . . . . . . . . . . . . . . . . . . .   
Other (expense) income, net . . . . . . . . . . . . . . . .   
Net (loss) income  . . . . . . . . . . . . . . . . . . . . . . . . . . .    $
Basic and diluted net (loss) income per common 
share  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    $

 6,234   $
 4,166  

 41,417   $ 
 4,625  

 5,078    $
 5,099   

 5,086
 (23)

 —  
 776  
 2,027  
 13,203  

 28,018  
 7,095  
 35,113  
 (21,910) 

 —  
 832  
 1,426  
 48,300  

 27,647  
 6,872  
 34,519  
 13,781  

 —   
 532   
 718   
 11,427   

 25,666   
 7,000   
 32,666   
 (21,239) 

 5,484
 708
 1,356
 12,611

 30,437
 7,261
 37,698
 (25,087)

 —  
 (372) 
 (22,282)  $

 —  
 (146) 
 13,635   $ 

 —   
 (379) 
 (21,618)  $

 (5,437)
 50
 (30,474)

 (0.26)  $

 0.16   $ 

 (0.25)  $

 (0.35)

96 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
     
    
     
          
           
  
  
  
 
 
 
 
 
  
  
  
 
  
  
  
 
  
  
  
 
 
 
 
 
 
 
 
   
 
   
  
  
  
 
  
  
  
 
  
  
  
 
  
  
  
 
 
 
 
 
  
  
  
 
 
 
 
 
 
 
 
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
  
  
  
 
 
 
 
 
  
  
  
 
  
  
  
 
  
  
  
 
 
 
 
 
 
 
 
   
 
   
  
  
  
 
  
  
  
 
  
  
  
 
  
  
  
 
 
 
 
 
  
  
  
 
 
 
 
 
Item 9.  Changes in and Disagreements with Accountants on Accounting and Financial Disclosure 

None. 

Item 9A.  Controls and Procedures 

1. 

Disclosure Controls and Procedures 

Our management, with the participation of our principal executive officer and principal financial officer, has 

evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) or 15d-15(e) under 
the Securities Exchange Act of 1934, as amended) as of the end of the period covered by this Annual Report on 
Form 10-K. Based on such evaluation, our principal executive officer and principal financial officer have concluded that, 
as of the end of such period, our disclosure controls and procedures were adequate and effective. 

2. 

Internal Control Over Financial Reporting 

(a) 

Management’s Annual Report on Internal Control Over Financial Reporting 

Our management is responsible for establishing and maintaining adequate internal control over financial 

reporting. Internal control over financial reporting is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act 
as a process designed by, or under the supervision of, our principal executive and principal financial officers and 
effected by our board of directors, management and other personnel to provide reasonable assurance regarding the 
reliability of financial reporting and the preparation of financial statements for external purposes in accordance with 
generally accepted accounting principles in the U.S. and includes those policies and procedures that: 

• 

• 

• 

pertain to the maintenance of records that in reasonable detail accurately and fairly reflect our transactions 
and dispositions of our assets; 

provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial 
statements in accordance with generally accepted accounting principles, and that our receipts and 
expenditures are being made only in accordance with authorizations of our management and directors; and 

provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or 
disposition of our assets that could have a material effect on the financial statements. 

Because of its inherent limitations, internal control over financial reporting may not prevent or detect 
misstatements. Projections of any evaluation of effectiveness to future periods are subject to the risks that controls may 
become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures 
may deteriorate. 

Management assessed the effectiveness of our internal control over financial reporting as of June 30, 2016. In 

making this assessment, management used the criteria established in Internal Control—Integrated Framework issued by 
the Committee of Sponsoring Organizations of the Treadway Commission, or COSO, in 2013. 

Based on this assessment, management has concluded that, as of June 30, 2016 our internal control over 

financial reporting is effective. 

Ernst & Young LLP, our independent registered public accounting firm, has issued a report on the effectiveness 

of our internal control over financial reporting as of June 30, 2016. This report appears immediately below. 

(b) 

Attestation Report of the Independent Registered Public Accounting Firm 

97 

 
 
Report of Independent Registered Public Accounting Firm 

The Board of Directors and Shareholders of ImmunoGen, Inc. 

We have audited ImmunoGen, Inc.’s internal control over financial reporting as of June 30, 2016, based on 

criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of 
the Treadway Commission (2013 framework)(the COSO criteria). ImmunoGen, Inc.’s management is responsible for 
maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal 
control over financial reporting included in the accompanying Management’s Annual Report on Internal Control Over 
Financial Reporting. Our responsibility is to express an opinion on the company’s internal control over financial 
reporting based on our audit. 

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board 

(United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether 
effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining 
an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing 
and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such 
other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis 
for our opinion. 

A company’s internal control over financial reporting is a process designed to provide reasonable assurance 

regarding the reliability of financial reporting and the preparation of financial statements for external purposes in 
accordance with generally accepted accounting principles. A company’s internal control over financial reporting 
includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately 
and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that 
transactions are recorded as necessary to permit preparation of financial statements in accordance with generally 
accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance 
with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding 
prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a 
material effect on the financial statements. 

Because of its inherent limitations, internal control over financial reporting may not prevent or detect 
misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls 
may become inadequate because of changes in conditions, or that the degree of compliance with the policies or 
procedures may deteriorate. 

In our opinion, ImmunoGen, Inc. maintained, in all material respects, effective internal control over financial 

reporting as of June 30, 2016, based on the COSO criteria. 

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board 

(United States), the consolidated balance sheets of ImmunoGen, Inc. as of June 30, 2016 and 2015, and the related 
consolidated statements of operations and comprehensive loss, shareholders’ (deficit) equity and cash flows for each of 
the three years in the period ended June 30, 2016 and our report dated August 25, 2016 expressed an unqualified opinion 
thereon. 

/s/ Ernst & Young LLP 

Boston, Massachusetts 
August 25, 2016 

98 

 
 
 
(c) 

Changes in Internal Control Over Financial Reporting 

There have not been any changes in our internal control over financial reporting (as such term is defined in 
Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the quarter endedJune 30, 2016 that have materially 
affected, or are reasonably likely to materially affect, our internal control over financial reporting. 

3. 

Limitations on the Effectiveness of Controls 

Our management, including our principal executive officer and principal financial officer, does not expect that 
our disclosure controls and procedures or its internal control over financial reporting will prevent all error and all fraud. 
A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that 
the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are 
resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent 
limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and 
instances of fraud, if any, within an organization have been detected. These inherent limitations include the realities that 
judgments in decision-making can be faulty, and that breakdowns can occur because of simple error or mistake. 

Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more 
people, or by management override of the control. The design of any system of controls also is based in part upon certain 
assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in 
achieving our stated goals under all potential future conditions. Over time, controls may become inadequate because of 
changes in conditions, or the degree of compliance with the policies or procedures may deteriorate. Because of the 
inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be 
detected. 

99 

 
 
Item 9B.  Other Information 

None. 

PART III 

The information called for by Part III of Form 10-K (Item 10—Directors, Executive Officers and Corporate 

Governance of the Registrant, Item 11—Executive Compensation, Item 12—Security Ownership of Certain Beneficial 
Owners and Management and Related Stockholder Matters, Item 13—Certain Relationships and Related Transactions, 
and Director Independence, and Item 14—Principal Accounting Fees and Services) is incorporated by reference from 
our proxy statement related to our 2016 annual meeting of shareholders, which will be filed with the Securities and 
Exchange Commission not later than October 28, 2016 (120 days after the end of the fiscal year covered by this Annual 
Report on Form 10-K), except that information required by Item 10 concerning our executive officers appears in Part I, 
Item 3.1 of this Annual Report on Form 10-K. 

Item 15.  Exhibits, Financial Statement Schedules 

(a) 

Financial Statements: 

PART IV 

(1) 

See “Index to Consolidated Financial Statements” at Item 8 of this Annual Report on 

Form 10-K. Schedules not included herein are omitted because they are not applicable or the required 
information appears in the accompanying Consolidated Financial Statements or Notes thereto. 

(2) 

See Exhibit Index following the signature page to this Annual Report on Form 10-K. 

100 

 
 
 
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has 

duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. 

SIGNATURES 

IMMUNOGEN, INC.

By:

/s/Mark J. Enyedy 
Mark J. Enyedy 
President and 
Chief Executive Officer 
(Principal Executive Officer)

Dated: August 25, 2016 

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the 

following persons on behalf of the Registrant in the capacities and on the dates indicated. 

Signature 

Title

Date

/s/ MARK J. ENYEDY 
Mark J. Enyedy 

President, Chief Executive Officer and Director 
(Principal Executive Officer) 

August 25, 2016 

/s/ DAVID B. JOHNSTON 
David B. Johnston 

/s/ STEPHEN MCCLUSKI 
Stephen McCluski 

/s/ DANIEL M. JUNIUS 
Daniel M. Junius 

/s/ MARK GOLDBERG, M.D. 
Mark Goldberg, M.D. 

/s/ DEAN MITCHELL 
Dean Mitchell 

/s/ NICOLE ONETTO, M.D. 
Nicole Onetto, M.D. 

/s/ KRISTINE PETERSON 
Kristine Peterson 

/s/ HOWARD PIEN 
Howard Pien 

/s/ JOSEPH VILLAFRANCA PH.D. 
Joseph Villafranca, Ph.D. 

/s/ RICHARD WALLACE 
Richard Wallace 

Executive Vice President and 
Chief Financial Officer 
(Principal Financial and Accounting Officer) 

August 25, 2016 

Chairman of the Board of Directors 

August 25, 2016 

August 25, 2016 

August 25, 2016 

August 25, 2016 

August 25, 2016 

August 25, 2016 

August 25, 2016 

August 25, 2016 

August 25, 2016 

Director 

Director 

Director 

Director 

Director 

Director 

Director 

Director 

101 

 
 
 
 
 
 
 
 
 
 
 
 
 
     
     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
EXHIBIT INDEX 

Filed
with this
Form 10-K  

Exhibit 
Number 
 3.1 

     Restated Articles of Organization, as amended 

Exhibit Description 

 3.1(a) 

  Articles of Amendment 

 3.2 

 4.1 

 4.1(a) 

  Amended and Restated By-Laws 

Article 4 of Restated Articles of Organization, as 
amended (see Exhibit 3.1) 

Indenture, dated as of June 20, 2016, by and 
between the Registrant and Wilmington Trust, 
National Association, as Trustee 

 4.2 

Form of Common Stock  certificate 

 4.2(a) 

10.1 

10.1(a) 

10.1(b) 

10.1(c) 

10.1(d) 

10.1(e) 

10.1(f) 

10.1(g) 

10.1(h) 

Form of Note representing the Registrant’s 
4.50% Convertible Senior Notes due 2021 
(included as Exhibit A to the Indenture filed as 
Exhibit 4.1(a)) 

Leases dated as of December 1, 1986 and 
June 21, 1988 by and between James H. Mitchell, 
Trustee of New Providence Realty Trust, lessor, 
and Charles River Biotechnical Services, Inc. 
(“Lessee”), together with Assignment of Leases 
dated June 29, 1989 between Lessee and the 
Registrant 

First Amendment to Lease dated May 9, 1991 by 
and between James H. Mitchell, Trustee of New 
Providence Realty Trust, lessor, and the 
Registrant 

Confirmatory Second Amendment to Lease dated 
September 17, 1997 by and between James H. 
Mitchell, Trustee of New Providence Realty 
Trust, lessor, and the Registrant 

Third Amendment and Partial Termination of 
Lease dated as of August 8, 2000 by and between 
James H. Mitchell, Trustee of New Providence 
Realty Trust, lessor, and the Registrant 

Fourth Amendment to Lease dated as of 
October 3, 2000 by and between James H. 
Mitchell, Trustee of New Providence Realty 
Trust, lessor, and the Registrant 

Fifth Amendment to Lease dated as of June 7, 
2001 by and between James H. Mitchell, Trustee 
of New Providence Realty Trust, lessor, and the 
Registrant 

Sixth Amendment to Lease dated as of April 30, 
2002 by and between Bobson 333 L.L.C., lessor, 
and the Registrant 

Seventh Amendment to Lease dated as of 
October 20, 2005 by and between Bobson 333 
L.L.C., lessor, and the Registrant 

Eighth Amendment to Lease dated as of 
February 21, 2007 by and between Bobson 333 
L.L.C., lessor, and the Registrant 

102 

Incorporated by Reference

Filing Date 
with SEC 

April 30, 2010    

January 30, 2013 

June 20, 2016 

Exhibit
Number
3.1

3.1

3.1

June 20, 2016

4.1

November 15, 1989
(File No. 33-31219) 

4.2

Form
10-Q 

10-Q 

8-K 

8-K 

S-1 

S-1 

September 22, 1989
(File No. 33-31219)

10.10

S-1 

November 6, 1991
(File No. 33-43725)

10.10a

10-K 

September 26, 1997

10.10

10-K 

September 2, 2008

10.1(c)

10-K 

September 2, 2008

10.1(d)

10-K 

September 2, 2008

10.1(e)

10-K 

September 2, 2008

10.1(f)

10-K 

September 2, 2008

10.1(g)

10-K 

September 2, 2008

10.1(h)

 
 
 
 
 
 
 
 
 
 
 
     
    
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 
Number 
10.1(i) 

10.2 

10.2(a) 

10.2(b) 

10.2(c) 

10.3* 

10.3(a)* 

10.3(b)* 

10.3(c) 

10.4* 

10.4(a) 

10.4(b) 

10.4(c) 

10.5* 

10.5(a)* 

Exhibit Description 

Ninth Amendment to Lease dated as of 
November 17, 2010 by and between Bobson 
333 LLC and the Registrant 

Lease Agreement, dated as of July 27, 2007, by 
and between Intercontinental Fund III 830 Winter 
Street LLC, landlord, and the Registrant 

First Amendment to Lease Agreement dated as of 
December 9, 2013, by and between 
Intercontinental Fund III 830 Winter Street LLC, 
landlord, and the Registrant 

Second Amendment to Lease Agreement dated as 
of April 28, 2014, by and between 
Intercontinental Fund III 830 Winter Street LLC, 
landlord, and the Registrant 

Third Amendment to Lease Agreement dated as 
of December 14, 2015 by and between CRP/King 
830 Winter, L.L.C., landlord, and the Registrant   

License Agreement dated effective May 2, 2000 
by and between the Registrant and 
Genentech, Inc. 

Amendment to License Agreement for 
Anti-HER2 Antibodies, dated as of May 3, 2006, 
between the Registrant and Genentech, Inc. 

Amendment to License Agreements made 
effective as of March 11, 2009, between the 
Registrant and Genentech, Inc. 

Third Amendment to License Agreement for 
Anti-HER2 Antibodies, made effective as of 
December 18, 2012, between the Registrant and 
Genentech, Inc. 

Collaboration and License Agreement dated as of 
July 30, 2003 by and between the Registrant and 
sanofi-aventis U.S. LLC (as successor-in-interest 
to Aventis Pharmaceuticals Inc.) 

Amendment No. 1, dated as of August 31, 2006, 
to the Collaboration and License Agreement 
between the Registrant and sanofi-aventis 
U.S. LLC 

Amendment No. 2, dated as of December 7, 
2007, to the Collaboration and License 
Agreement between the Registrant and 
sanofi-aventis U.S. LLC 

Amendment No. 3, dated as of August 31, 2008, 
to the Collaboration and License Agreement 
between the Registrant and sanofi-aventis 
U.S. LLC 

Collaborative Development and License 
Agreement dated as of July 7, 2006 by and 
between the Registrant and Biotest AG 

Amendment No. 1, dated August 23, 2006, to 
Collaborative Development and License 
Agreement by and between the Registrant and 
Biotest AG 

Filed
with this
Form 10-K  

Incorporated by Reference

Form
8-K 

Filing Date 
with SEC 
November 18, 2010

Exhibit
Number
10.1

10-Q 

November 7, 2007

10.2

10-Q 

February 5, 2014

10.1

10-Q 

May 2, 2014

10.1

10-Q 

February 4, 2016 

10.1

10-Q 

October 31, 2011

10.1

10-K 

August 28, 2006

10.32

10-Q 

May 7, 2009

10.1

10-Q 

January 30, 2013

10.11

10-K 

August 28, 2014

10.4

10-Q 

October 30, 2014

10.4

10-Q 

October 30, 2014

10.5

10-Q 

October 30, 2014

10.6

10-Q 

November 3, 2006

10.2

10-Q 

November 3, 2006

10.3

103 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 
Number 
10.5(b)* 

10.6* 

10.7* 

10.7(a)* 

10.8* 

10.9* 

Exhibit Description 
Amendment No. 2, dated December 10, 2014, to 
Collaborative Development and License 
Agreement by and between the Registrant and 
Biotest AG 

Development and License Agreement dated as of 
October 20, 2008 by and between the Registrant 
and Bayer HealthCare AG 

Multi-Target Agreement dated as of October 8, 
2010 by and between the Registrant and Novartis 
Institutes for BioMedical Research, Inc. 

First Amendment, effective as of March 29, 
2013, to Multi-Target Agreement by and between 
the Registrant and Novartis Institutes for 
BioMedical Research, Inc. 

Clinical Supply Agreement effective as of 
December 12, 2010 by and between the 
Registrant and Societá Italiana 
Corticosteroidi S.r.l. (Sicor) 

Multi-Target Agreement dated as of 
December 19, 2011 by and between the 
Registrant and Eli Lilly and Company 

10.9(a)* 

First Amendment to Agreements dated as of 
December 9, 2013 by and between the Registrant 
and Eli Lilly and Company 

10.10* 

10.11* 

10.12† 

Multi-Target Agreement dated as of March 20, 
2015 by and between the Registrant and 
Millennium Pharmaceuticals, Inc. 

Royalty Purchase Agreement dated as of 
March 24, 2015 by and among the Registrant, 
Hurricane, LLC and Immunity Royalty 
Holdings, L.P. 

2006 Employee, Director and Consultant Equity 
Incentive Plan, as amended and restated through 
November 11, 2014 

10.12(a)† 

Form of Incentive Stock Option Agreement for 
Executives 

10.12(b)† 

Form of Non-Qualified Stock Option Agreement 
for Executives 

10.12(c)† 

Form of Non-Qualified Stock Option Agreement 
for Directors 

10.12(d)†   Form of Director Deferred Stock Unit Agreement  

10.12(e)† 

Form of Incentive Stock Option Agreement for 
all employees (including executives) 

10.12(f)† 

Form of Non-Qualified Stock Option Agreement 
for all employees (including executives) 

10.12(g)† 

Form of Non-Qualified Stock Option Agreement 
for Directors 

10.12(h)† 

Form of Restricted Stock Agreement for all 
employees (including executives) 

10.12(i)† 

Form of Incentive Stock Option for all employees 
(including executives) 

10.12(j)† 

Form of Non-Qualified Stock Option Agreement 
for all employees (including executives) 

Filed
with this
Form 10-K  

Incorporated by Reference

Form
10-Q 

Filing Date 
with SEC 

February 5, 2015

Exhibit
Number
10.1

10-Q/A 

October 10, 2012

10.1

10-Q/A 

August 19, 2015

10.2

10-Q 

May 6, 2013

10.1

10-Q 

February 8, 2011

10.1

10-Q/A 

August 19, 2015

10.3

10-Q 

February 5, 2014

10.2

10-Q 

10-Q 

May 8, 2015

10.1

May 8, 2015

10.2

8-K 

November 13, 2014

10.1

S-8 

S-8 

10-Q 

10-Q 

10-K 

10-K 

10-K 

S-8 

8-K 

8-K 

November 15, 2006

99.4

November 15, 2006

99.5

October 29, 2010

10.1

October 29, 2010 

10.1

August 29, 2012

10.14(g)

August 29, 2012

10.14(h)

August 29, 2012

10.14(i)

November 21, 2012

99.1

April 26, 2016

10.1

April 26, 2016

10.2

104 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 
Number 
10.12(k)† 

Exhibit Description 

Form of Performance Based Restricted Stock 
Agreement dated August 12, 2016 

10.13† 

  2001 Non-Employee Director Stock Plan 

10.14† 

10.15† 

10.16† 

10.17† 

10.18† 

10.19† 

10.20† 

10.21† 

10.22† 

10.23† 

10.24† 

10.25† 

2004 Non-Employee Director Compensation and 
Deferred Stock Unit Plan, as amended on 
September16, 2009 

Form of Proprietary Information, Inventions and 
Competition Agreement between the Registrant 
and each of its executive officers 

Change in Control Severance Agreement dated as 
of November 30, 2012 between the Registrant 
and Craig Barrows 

Change in Control Severance Agreement dated as 
of November 30, 2012 between the Registrant 
and John M. Lambert 

Change in Control Severance Agreement dated as 
of November 30, 2012 between the Registrant 
and Charles Q. Morris 

Change in Control Severance Agreement dated as 
of November 30, 2012 between the Registrant 
and Peter Williams 

Compensation Policy for Non-Employee 
Directors, as amended through November 12, 
2013 

Change in Control Severance Agreement dated as 
of December 30, 2013 between the Registrant 
and David B. Johnston 

Change in Control Severance Agreement dated as 
of February 20, 2014 between the Registrant and 
Ellie Harrison 

Severance Pay Plan for Vice Presidents and 
Higher 

Employment offer letter between the Registrant 
and Sandra E. Poole 

Change in Control Severance Agreement dated as 
of September 15, 2014 between the Registrant 
and Sandra E. Poole 

10.26† 

  Summary of Annual Bonus Program 

10.27† 

10.28† 

10.29† 

10.30† 

10.31† 

Change in Control Severance Agreement dated as 
of January 5, 2015 between the Registrant and 
Richard J. Gregory 

Amendment to Option Agreements between the 
Registrant and Daniel M. Junius 

Letter Agreement dated March 31, 2016 between 
the Registrant and Charles Q. Morris 

Employment offer letter between the Registrant 
and Mark J. Enyedy 

Change in Control Severance Agreement dated as 
of May 16, 2016 between the Registrant and 
Mark J Enyedy 

21 

23 

  Subsidiaries of the Registrant 

  Consent of Ernst & Young LLP 

X 

X 

X 

X 

105 

Filed
with this
Form 10-K  

Incorporated by Reference

Filing Date 
with SEC 
August 17, 2016

Exhibit
Number
10.1

December 18, 2001 

November 4, 2009

99

10.1

Form
8-K 

S-8 

10-Q 

10-Q 

February 8, 2007

10.15

10-Q 

January 30, 2013

10.1

10-Q 

January 30, 2013

10.3

10-Q 

January 30, 2013

10.4

10-Q 

January 30, 2013

10.7

10-Q 

February 5, 2014

10.3

10-Q 

February 5, 2014

10.6

10-Q 

May 2, 2014

10.3

8-K 

September 18, 2014

10.1

10-Q 

10-Q 

8-K 

10-Q 

10-Q 

October 30, 2014

10.1

October 30, 2014

10.2

November 13, 2014 

February 5, 2015

10.2

10.3

May 4, 2016

10.1

10-K 

August 28, 2015 

21

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 
Number 
31.1 

31.2 

32 

Exhibit Description 

Certification of the Chief Executive Officer 
pursuant to Section 302 of the Sarbanes-Oxley 
Act of 2002 

Certification of the Chief Financial Officer 
pursuant to Section 302 of the Sarbanes-Oxley 
Act of 2002 

Certifications of Chief Executive Officer and 
Chief Financial Officer pursuant to Section 906 
of the Sarbanes-Oxley Act of 2002 

101.INS    XBRL Instance Document 

101.SCH   XBRL Taxonomy Extension Schema 

101.CAL 

XBRL Taxonomy Extension Calculation 
Linkbase 

101.DEF   XBRL Taxonomy Extension Definition Linkbase  

101.LAB   XBRL Taxonomy Extension Label Linkbase 

101.PRE 

XBRL Taxonomy Extension Presentation 
Linkbase 

Filed
with this
Form 10-K  
X 

Incorporated by Reference

Form

Filing Date 
with SEC 

Exhibit
Number

X 

X 

X 

X 

X 

X 

X 

X 

*  Portions of this Exhibit were omitted, as indicated by [***], and have been filed separately with the Secretary of the 

Commission pursuant to the Registrant’s application requesting confidential treatment. 

†  Exhibit is a management contract or compensatory plan, contract or arrangement required to be filed as an exhibit to 

the annual report on Form 10-K.  

106 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
EXHIBIT 31.1 

I, Mark J. Enyedy, certify that: 

CERTIFICATIONS UNDER SECTION 302 

1. 

2. 

3. 

4. 

I have reviewed this Annual Report on Form 10-K of ImmunoGen, Inc.; 

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact 
necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading 
with respect to the period covered by this report; 

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all 
material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods 
presented in this report; 

The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and 
procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as 
defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have: 

a) 

b) 

c) 

d) 

designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed 
under our supervision, to ensure that material information relating to the registrant, including its consolidated 
subsidiaries, is made known to us by others within those entities, particularly during the period in which this report 
is being prepared; 

designed such internal control over financial reporting, or caused such internal control over financial reporting to be 
designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and 
the preparation of financial statements for external purposes in accordance with generally accepted accounting 
principles; 

evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our 
conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by 
this report based on such evaluation; and 

disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during 
the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that 
has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial 
reporting; and 

5. 

The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over 
financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons 
performing the equivalent functions): 

a) 

b) 

all significant deficiencies and material weaknesses in the design or operation of internal control over financial 
reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and 
report financial information; and 

any fraud, whether or not material, that involves management or other employees who have a significant role in the 
registrant’s internal control over financial reporting. 

Date: August 25, 2016 

/s/ Mark J. Enyedy 
Mark J. Enyedy 
President and Chief Executive Officer 
(Principal Executive Officer) 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
EXHIBIT 31.2 

I, David B. Johnston, certify that: 

CERTIFICATIONS UNDER SECTION 302 

1. 

2. 

3. 

4. 

I have reviewed this Annual Report on Form 10-K of ImmunoGen, Inc.; 

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact 
necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading 
with respect to the period covered by this report; 

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all 
material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods 
presented in this report; 

The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and 
procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as 
defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have: 

a) 

b) 

c) 

d) 

designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed 
under our supervision, to ensure that material information relating to the registrant, including its consolidated 
subsidiaries, is made known to us by others within those entities, particularly during the period in which this report 
is being prepared; 

designed such internal control over financial reporting, or caused such internal control over financial reporting to be 
designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and 
the preparation of financial statements for external purposes in accordance with generally accepted accounting 
principles; 

evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our 
conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by 
this report based on such evaluation; and 

disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during 
the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that 
has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial 
reporting; and 

5. 

The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over 
financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons 
performing the equivalent functions): 

a) 

b) 

all significant deficiencies and material weaknesses in the design or operation of internal control over financial 
reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and 
report financial information; and 

any fraud, whether or not material, that involves management or other employees who have a significant role in the 
registrant’s internal control over financial reporting. 

Date: August 25, 2016 

/s/ DAVID B. JOHNSTON 
David B. Johnston 
Executive Vice President and Chief Financial Officer 
(Principal Financial and Accounting Officer) 

 
 
 
 
 
 
CERTIFICATIONS UNDER SECTION 906 

EXHIBIT 32 

Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 
of title 18, United States Code), each of the undersigned officers of ImmunoGen, Inc., a Massachusetts corporation (the 
“Company”), does hereby certify, to such officer’s knowledge, that: 

The Annual Report for the year ended June 30, 2016 (the “Form 10- K”) of the Company fully complies with 
the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and the information contained in the 
Form 10-K fairly presents, in all material respects, the financial condition and results of operations of the Company. 

Dated: August 25, 2016 

Dated: August 25, 2016 

/s/ Mark J. Enyedy 
Mark J. Enyedy 
President and Chief Executive Officer 
(Principal Executive Officer) 

/s/ DAVID B. JOHNSTON 
David B. Johnston 
Executive Vice President and Chief Financial Officer 
(Principal Financial and Accounting Officer) 

A signed original of this written statement required by Section 906 has been provided to the Company and will 

be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request. 

 
 
 
 
 
 
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(This page has been left blank intentionally.)

IMMUNOGEN, INC. 
Stock Price Performance Graph 

The graph and table below compare the annual percentage change in our cumulative total shareholder return on 

our common stock for the period from June 30, 2011 through June 30, 2016 (as measured by dividing (i) the sum of 
(A) the cumulative amount of dividends for the measurement period, assuming dividend reinvestment, and (B) the 
difference between our share price at the end and the beginning of the measurement period; by (ii) the share price at the 
beginning of the measurement period) with the total cumulative return of the NASDAQ Stock Market Index (U.S.) and 
the NASDAQ Pharmaceutical Stocks Total Return Index during such period. We have not paid any dividends on our 
common stock, and no dividends are included in the representation of our performance. The stock price performance on 
the graph below is not necessarily indicative of future price performance. This graph is not “soliciting material,” is not 
deemed filed with the Commission and is not to be incorporated by reference in any of our filings under the Securities 
Act of 1933, or the Securities Exchange Act of 1934, whether made before or after the date hereof and irrespective of 
any general incorporation language in any such filing. Information used on the graph for the NASDAQ Pharmaceutical 
Stocks Total Return Index and the NASDAQ Stock Market Index (U.S.) was prepared by the Center for Research in 
Security Prices, a source believed to be reliable, but we are not responsible for any errors or omissions in such 
information. 

IMMUNOGEN, INC. . . . . . . . . . . . . . . . . . . . . . .   $ 100.00
NASDAQ STOCK MARKET INDEX (U.S.)  . .   $ 100.00
NASDAQ PHARMACEUTICAL STOCKS 
TOTAL RETURN INDEX*  . . . . . . . . . . . . . . . .   $ 100.00

2011 

2012 
$ 137.33
$ 108.88

2013 
$ 136.10
$ 128.17

2014 

2015 

$  97.21  $ 117.97
$ 167.42  $ 192.03

2016 
$  25.27
$ 191.78

$ 117.39

$ 162.31

$ 230.41  $ 319.41

$ 229.80

*  This index represents a group of peer issuers compiled by the Center for Research in Security Prices. 

The above graph and table assume $100 invested on June 30, 2011 with all dividends reinvested, in each of our common 
stock, the NASDAQ Stock Market Index (U.S.) and the NASDAQ Pharmaceutical Stocks Total Return Index. Upon 
written request by any shareholder, we will promptly provide a list of the companies comprising the NASDAQ 
Pharmaceutical Stocks Total Return Index. 

 
 
 
 
 
 
 
 
    
    
    
    
    
    
 
(This page has been left blank intentionally.)

Positioned for Sustainable Value Creation

Industry-Leading ADC Pipeline

Corporate Information

Wholly-owned programs

COMPOUND | TARGET

PRECLINICAL

PHASE 1

PHASE 2

PHASE 3

MARKETED

Met with FDA;

Phase 3 starting 4Q16

Directors

Executive Offi cers

Corporate Headquarters

Chairman of the Board
Stephen C. McCluski
Former Senior Vice President and 
Chief Financial Offi cer,
Bausch & Lomb, Inc.

Mark J. Enyedy
President and Chief Executive Offi cer, 
ImmunoGen, Inc.

Mark Goldberg, MD
Former Executive Vice President,
Medical and Regulatory Strategy
Synageva BioPharma Corp.

Daniel M. Junius
Former President and Chief Executive 
Offi cer, ImmunoGen, Inc.

Dean J. Mitchell
Executive Chairman of the Board, 
Covis Pharma Holdings S.a.r.l.

Mark J. Enyedy
President and 
Chief Executive Offi cer

Richard Gregory, PhD
Executive Vice President, 
Chief Scientifi c Offi cer

David B. Johnston
Executive Vice President and 
Chief Financial Offi cer

John M. Lambert, PhD
Executive Vice President and 
Distinguished Research Fellow

Sandra E. Poole
Executive Vice President, 
Technical and Commercial Operations

Craig Barrows
Vice President, General Counsel 
and Secretary

Nicole Onetto, MD, MSc
Former Deputy Director and 
Chief Scientifi c Offi cer, 
Ontario Institute for Cancer Research

Peter J. Williams
Vice President, 
Business Development

Kristine Peterson
Former Chief Executive Offi cer, 
Valeritas, Inc.

Howard H. Pien
Former Chairman and Chief Executive
Offi cer, Medarex, Inc.

Joseph J. Villafranca, PhD
President, 
BioPharmaceutical Consultants, LLC

Richard J. Wallace
Former Senior Vice President
Research and Development, 
GlaxoSmithKline plc 

ImmunoGen, Inc.
830 Winter Street
Waltham, MA 02451
781-895-0600
www.immunogen.com

Annual Meeting

11:00 AM on December 9, 2016
at the offi ces of the Company
830 Winter Street
Waltham, MA 02451

Stock Transfer Agent
and Registrar

Broadridge Corporate Issuer 
Solutions, Inc.
P.O. Box 1342
Brentwood, NY 11717
Phone: 877-830-4936
Fax: 215-553-5402
Email: shareholder@broadridge.com

Auditors

Ernst & Young LLP
Boston, MA

Shareholder Inquiries

Information about ImmunoGen can 
be found at www.immunogen.com. 
Inquiries related to the Company may 
be directed to the Investor Relations 
department at our headquarters. 
Communications related to stock and 
transfer requirements, including lost 
stock certifi cates and change of name 
or address, should be directed to the 
Transfer Agent.

Entered clinic in 2015

This  annual  report  includes  forward-looking  statements  based  on  management’s  current  expectations.  These  statements  include,  but  are  not  limited  to,  ImmunoGen’s  expectations  related  to 
the advancement of new Company and partner compounds into clinical testing, the initiation of new clinical trials, the timing of next-step clinical decisions, and the timing and occurrence of the 
presentation of new preclinical and clinical data, of potential business development events, and of potential future regulatory submissions. For these statements, ImmunoGen claims the protection 
of 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 
annual report. 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 partners’ 
research and clinical development processes; the diffi culties 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 fi nancially 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 fi scal year ended June 30, 2016 and other reports fi led with the Securities and Exchange Commission.

Avastin®, Kadcyla®, Keytruda® and Rituxan® are registered trademarks of their respective owners.

Leadership in antibody-drug 

conjugates (ADCs) 

Lead program entering 

Phase 3 before year-end

Platform generating

novel clinical candidates

$

Technology validated clinically and 

through partnerships

Strong cash

position

Experienced

management team 

Strategic Direction and Priorities 

Building a fully-integrated biotech delivering innovative ADC therapies

that meaningfully improve the lives of cancer patients

Execute on

Accelerate

Continue to drive 

Lever partnerships

speed-to-market 

earlier-stage portfolio 

innovation in ADCs

to expand impact

for mirvetuximab 

with an emphasis on

as cancer therapies

of innovations

soravtansine

IGN ADCs

With a focus on enhanced fi nancial discipline

Mirvetuximab soravtansine 

Ovarian - monotherapy

(formerly IMGN853) | 

Folate receptor α

Ovarian - combination

IMGN779 | CD33

Acute myeloid leukemia

IMGN632 | CD123

Hematological malignancies

IMGN529 | CD37

DLBCL* with Rituxan®

Coltuximab ravtansine | CD19

DLBCL

Partner programs

Indatuximab ravtansine

(BT-062) | CD138

Multiple myeloma

Isatuximab† | CD38

Multiple myeloma

SAR566658 | CA6

Solid tumors

SAR408701 | CeCAM5

Solid tumors

Roche

Bayer

Biotest

Sanofi 

Novartis

Lilly

Amgen

AMG Undisclosed

CytomX

CX-2009 | CD166

Takeda

TBD | GCC

* DLBCL: Diffuse large B-cell lymphoma. † Naked antibody; all other compounds are ADCs

COMPOUND | TARGET

PRECLINICAL

PHASE 1

PHASE 2

PHASE 3

MARKETED

KADCYLA® Ado-trastuzumab 

emtansine | HER2

Second-line metastatic breast cancer

Anetumab ravtansine

(BAY 94-9343) | Mesothelin

Mesothelioma

Registration-enabling;

Phase 2 started in 2016

SAR428926 | LAMP1

Solid tumors

Entered clinic in 2015

PCA062 | p-Cadherin

Solid tumors

Entered clinic in 2015

LY3076226 | FGFR3

Solid tumors

Entered clinic in 2015

Delivering 

Innovative 

Cancer 

Therapies

830 WINTER STREET, WALTHAM, MA 02451

PHONE: 781-895-0600

W W W. I M M U N O G E N .C O M

2016 F O R M

10 - K

A N N UA L

R E P O R T