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XOMA Royalty Corp.

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FY2015 Annual Report · XOMA Royalty Corp.
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A NN U AL R EPO RT  2015

D E A R   S T O C K H O L D E R

2015 was a challenging year for XOMA and all of us who are stockholders, with 
Servier’s Phase 3 EYEGUARD-B study of gevokizumab in patients with Behçet’s 
disease uveitis failing to achieve its primary endpoint. While we were surprised 
and disappointed by this unexpected finding, we didn’t let it stop us from moving 
forward toward our ultimate goal of bringing new medicines to market to help 
patients in need. Rather, while considered a setback, it was also an opportunity 
to re-focus XOMA on another disease area with significant unmet medical needs 
that we believe we can address – endocrinology. 

Paul Rubin, M.D., Senior Vice President of Research and Development and Chief Medical Officer, made sure 
we  were  prepared  for  the  unexpected.  Paul’s  team  recognized  XOMA  358  could  have  a  major  impact  on 
hyperinsulinemia,  a  rare  condition  caused  when  the  pancreas  produces  too  much  insulin.    This  led  him  to 
challenge  his  scientific  team  to  probe  XOMA’s  metabolic  platform  (XMet)  and  exceptionally  deep  antibody 
libraries to identify other antibodies that could potentially treat endocrine disorders. In a short period of time, 
his team identified several potential compounds. Today, our endocrine portfolio includes the following assets: 

•  XOMA 358 – in Phase 2 development to treat hyperinsulinemia

•  XOMA 129 – an antibody fragment (Fab) from the XMetD program in preclinical development to treat 

severe acute hypoglycemia (dangerously low blood sugar)

•  XOMA 213 – which we brought back from Novartis and now are initiating Phase 2 development for 

hyperprolactinemia conditions  

•  Research programs – antagonists against the parathyroid receptor (anti-PTH1R) and the 

adrenocorticotropic hormone (anti ACTH)

These antibodies are differentiated from our previous development activities.  They do not target one point 
within a complex inflammatory response cascade that indirectly results in symptoms.  Each of our endocrine 
antibodies impacts a clinically validated biomarker directly related to a disease condition. For instance, we 
know the body responds to insulin or prolactin production very predictably.  Therefore, we should generate 
clear answers from clinical study results with our endocrine antibodies, and we should have answers quickly.

In October 2015, we initiated our Phase 2 proof-of-concept program for XOMA 358. The first Phase 2 study 
is  enrolling  patients  experiencing  hypoglycemia  due  to  congenital  hyperinsulinism  (CHI),  a  rare  disease  in 
which  the  beta  cells  of  the  pancreas  secrete  excessive  insulin.  This  can  cause  hypoglycemia,  which  can 
lead to brain damage or, in rare cases, death. CHI manifests in infancy and remains for a lifetime. A second 
Phase 2 study will evaluate XOMA 358 in patients who experience hyperinsulinemia after undergoing bariatric 
surgery. We expect the results of these two studies to provide us with important information about the safety, 
pharmacokinetics, activity, dose response and duration of activity of XOMA 358 that will help us design the next 
phase of development including Phase 3 trials. We will be working with regulatory authorities throughout this 
process in an effort to expedite the development of this promising antibody.

In  order  to  allow  a  focus  on  our  endocrine  platform,
Jim Neal, Senior Vice President and Chief Operating Officer,
led  our  actions  to  monetize  our  non-endocrine  assets. 
To  fund  clinical  activities  for  XOMA  358,  XOMA  129 
and  XOMA  213,  we  licensed  several  of  our  late-stage 
non-core  preclinical  assets  in  deals  that  collectively 
generated  approximately  $65  million  in  immediate  non-
dilutive liquidity.  All of our financial resources have been 
redirected  toward  advancing  our  endocrine  portfolio; 
we  closed  the  three  remaining  EYEGUARD  studies  in 
September, and in early March 2016, we discontinued the 
Phase  3  pyoderma  gangrenosum  program  and  initiated 
licensing discussions for gevokizumab.

The  transactions  that  Jim’s  team  completed  included 
a  development  and  commercialization  agreement  with 
Novartis,  a  recognized  leader  in  oncology,  for  our  TGF-
beta monoclonal antibody program in immuno-oncology. 
Under  the  terms  of  the  deal,  we  received  a  $37  million 
upfront  payment,  potential  milestone  payments  of  up  to 
$480 million and, separately, deferred a $13.5 million debt 
obligation for five years. Having partnered with Novartis 
for a decade, we believe strongly it is the best company to 
champion our TGF-beta antibody program and bring it to 
market to help oncology patients. 

Also,  in  December  2015  we  entered  into  a  licensing 
agreement  with  Novo  Nordisk,  the  world’s  leader  in 
diabetes  treatments,  for  our  preclinical  XMetA  program 
–  a  portfolio  of  antibodies  designed  to  activate  the 
insulin  receptor  without  the  presence  of  insulin.  This 
is  a  potentially  ground-breaking  approach  to  diabetes 
discovered by Paul’s team, which could also offer a new 
therapeutic  option  for  a  rare  endocrine  disease.  Under 
the  terms  of  the  agreement,  we  received  a  $5  million 
license fee and are eligible for an additional $290 million 
in  milestones.  We  retained  commercialization  rights  to 
any  rare  disease  indications  that  arise  from  the  XMetA 
program.  

As  for  our  other  legacy  assets,  we  announced  in 
August  2015  our  interest  in  selling  our  biodefense  and 
manufacturing operations, as we had recently completed 
all  manufacturing  requirements  under  our  existing 
National  Institutes  of  Allergy  and  Infectious  Diseases 
(NIAID) biodefense contracts. In November 2015, we sold 

our  biologics  manufacturing  facilities,  equipment  and 
associated  real  estate  to  Agenus  Inc.  in  a  transaction 
worth approximately $5 million in cash and $1 million in 
stock. Additionally, we divested our biodefense program, 
including our anti-botulinum assets, to Nanotherapeutics, 
Inc.  

Finally, with our transformation to an endocrine company, 
we completed a reorganization to reflect our new direction. 
We transferred or reduced staff from approximately 190 to 
90 employees, all of whom are now focused exclusively 
on advancing our endocrine portfolio. 

Having  taken  these  important  actions,  we  believe  we 
have sufficient capital to fund operations through the first 
quarter of 2017. This will allow us to continue to be laser 
focused  on  advancing  our  deep  pipeline  of  endocrine 
assets, particularly XOMA 358, for which we expect data 
later this year.

While 2015 was tough, we’ve learned from the challenges 
we faced and taken the steps necessary for us to move 
forward  successfully.    Each  of  our  endocrine  portfolio 
assets has a clinically validated biomarker that is known 
to directly impact a disease condition.  We should begin to 
have clear answers from the results of our studies in 2016.

In closing, I would like to recognize and thank the patients 
and investigators in our studies. I am deeply appreciative 
of  our  employees  for  their  dedication  to  our  mission 
and  vision  throughout  the  particularly  difficult  period  of 
uncertainty  and  transition  through  which  we’ve  come.  I 
also want to thank you as stockholders for your continued 
support.  We  look  forward  to  keeping  you  apprised  of 
our  progress  during  the  year  ahead  as  we  continue  to 
advance our endocrine portfolio.

Sincerely,

John Varian

FORM 10-K 

 
 
 
 
 
 
 
 
 
 
 
 
 
(This page intentionally left blank)

UNITED STATES 
SECURITIES AND EXCHANGE COMMISSION 
Washington, D.C. 20549 

FORM 10-K 

(cid:95)  ANNUAL REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 

1934 

(cid:134)  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE 

ACT OF 1934 

For the fiscal year ended December 31, 2015 
OR 

For the transition period from                          to 
Commission File No. 0-14710 

XOMA Corporation 

(Exact name of registrant as specified in its charter) 

Delaware 
(State or other jurisdiction 
of incorporation or organization) 

2910 Seventh Street, Berkeley, 
California 94710 
(Address of principal executive offices, 
including zip code) 

52-2154066 
(I.R.S.  Employer  
Identification No.) 

(510) 204-7200 
(Telephone number) 

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

Title of each class 
Common Stock, $0.0075 par value  
Preferred Stock Purchase Rights 

Name of each exchange on which registered
The NASDAQ Stock Market, LLC

Securities registered pursuant to Section 12(g) of the Act: 
None 

Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes  (cid:134)    No  (cid:95) 
Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. Yes  (cid:134)    No  (cid:95) 
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.  Yes (cid:95)    No (cid:134) 

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

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K 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:95) 

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:134) 

Accelerated Filer 

(cid:95) 

Non-Accelerated Filer 
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act of 1934).    Yes  (cid:134)    No  (cid:95) 
The aggregate market value of voting common equity held by non-affiliates of the registrant is $451,024,815 as of June 30, 2015. 

Smaller reporting company 

   (cid:134)      

  (cid:134) 

Number of shares of Common Stock outstanding as of March 7, 2016: 119,615,729 

DOCUMENTS INCORPORATED BY REFERENCE: 

Portions of the Company’s Proxy Statement for the Company’s 2016 Annual General Meeting of Stockholders are incorporated by reference into 
Part III of this Report. 

 
 
 
 
 
 
  
 
 
  
 
 
 
 
   
 
XOMA Corporation 
2015 FORM 10-K ANNUAL REPORT 
TABLE OF CONTENTS 

PART I 

Item 1.  Business ...........................................................................................................................................................................  
Item 1A.  Risk Factors ...................................................................................................................................................................... 
Item 1B.  Unresolved Staff Comments ............................................................................................................................................. 
Properties .......................................................................................................................................................................... 
Item 2. 
Legal Proceedings ............................................................................................................................................................. 
Item 3. 
Item 4.  Mine Safety Disclosures ................................................................................................................................................... 

PART II   

Item 5.  Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities........ 
Item 6. 
Selected Financial Data .................................................................................................................................................... 
Item 7.  Management’s Discussion and Analysis of Financial Condition and Results of Operations ........................................... 
Item 7A.  Quantitative and Qualitative Disclosures about Market Risk ........................................................................................... 
Financial Statements and Supplementary Data ................................................................................................................. 
Item 8. 
Item 9.  Changes in and Disagreements With Accountants on Accounting and Financial Disclosure .......................................... 
Item 9A.  Controls and Procedures ................................................................................................................................................... 
Item 9B.  Other Information ............................................................................................................................................................. 

PART III  

Item 10.  Directors, Executive Officers, and Corporate Governance ............................................................................................... 
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 .................................................................. 
Item 14.  Principal Accountant Fees and Services ........................................................................................................................... 

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PART IV  

55
Item 15.  Exhibits and Financial Statement Schedules .................................................................................................................... 
56
SIGNATURES..................................................................................................................................................................................  
INDEX TO FINANCIAL STATEMENTS ......................................................................................................................................   F-1
INDEX TO EXHIBITS 

This annual report on Form 10-K includes trademarks, service marks and trade names owned by us or others. “XOMA,” the 
XOMA logo and all other XOMA product and service names are registered or unregistered trademarks of XOMA Corporation or a 
subsidiary of XOMA Corporation in the United States and in other selected countries. EYEGUARD is an unregistered service mark of 
a  subsidiary  of  XOMA  Corporation  in  the  United  States.  All  other  trademarks,  service  marks  and  trade  names  included  or 
incorporated by reference in this annual report are the property of their respective owners. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
PART I 

Certain  statements  contained  herein  related  to  the  anticipated  size  of  clinical  trials,  the  anticipated  timing  of  initiation  of  clinical 
trials,  the  expected  availability  of  clinical  trial  results,  the  results  of  clinical  trials,  the  timing  of  any  application  for  regulatory 
approval  of our  product  candidates  by  the  FDA  or  other  regulatory  authority,  the  sufficiency  of  our  cash  resources,  the  estimated 
costs of clinical trials and the amounts of certain revenues and certain costs in comparison to prior years, or that otherwise relate to 
future periods, are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the 
Securities  Exchange  Act  of  1934,  as  amended  (the  “Exchange  Act”).  All  statements,  other  than  statements  of  historical  fact  are 
statements  that  could  be  deemed  forward  looking  statements.  The  words  “believe,”  “may,”  “estimate,”  “continue,”  “could,” 
“anticipate,”  “assume,”  “intend,”  “expect,”  “predict,”  “potential”  “should,”  “would,”  and  similar  expressions  are  intended  to 
identify  forward-looking  statements.  These  statements  are  based  on  assumptions  that  may  not  prove  accurate.  Actual  results  could 
differ materially from those anticipated due to certain risks inherent in the biotechnology industry and for companies engaged in the 
development of new products in a regulated market. Among other things: our product candidates are still being developed, and we 
will require substantial funds to continue development which may not be available; we have received negative results from certain of 
our  clinical  trials,  and  we  face  uncertain  results  of  other  clinical  trials  of  our  product  candidates;  if  our  therapeutic  product 
candidates do not receive regulatory approval, neither our third-party collaborators, our contract manufacturers nor we will be able 
to manufacture and market them; we may not obtain orphan drug exclusivity or we may not receive the full benefit of orphan drug 
exclusivity  even  if  we  obtain  such  exclusivity;  even  once  approved,  a  product  may  be  subject  to  additional  testing  or  significant 
marketing  restrictions,  its  approval  may  be  withdrawn  or  it  may  be  voluntarily  taken  off  the  market;  we  may  not  be  successful  in 
commercializing our products, which could also affect our development efforts; we are subject to various state and federal healthcare 
related  laws  and  regulations  that  may  impact  the  commercialization  of  our  product  candidates  and  could  subject  us  to  significant 
fines and penalties; and certain of our technologies are in-licensed from third parties, so our capabilities using them are restricted 
and subject to additional risks. These and other risks, including those related to current economic and financial market conditions, 
are  contained principally  in  Item  1,  Business;  Item  1A,  Risk  Factors;  Item  7,  Management’s  Discussion  and  Analysis  of  Financial 
Condition and Results of Operations; and other sections of this Annual Report on Form 10-K.  Factors that could cause or contribute 
to these differences include those discussed in Item 1A, Risk Factors, as well as those discussed elsewhere in this Annual Report on 
Form 10-K. 

Forward-looking statements are inherently uncertain and you should not place undue reliance on these statements, which speak only 
as of the date that they were made. These cautionary statements should be considered in connection with any written or oral forward-
looking  statements  that  we  may  issue  in  the  future.  We  do  not  undertake  any  obligation  to  release  publicly  any  revisions  to  these 
forward-looking statements after completion of the filing of this Annual Report on Form 10-K to reflect later events or circumstances 
or to reflect the occurrence of unanticipated events. 

Item 1. 

Business 

Overview 

XOMA  Corporation  (“XOMA”),  a  Delaware  corporation,  is  a  development  stage  biotechnology  company  with  a  portfolio  of 
therapeutic antibodies. Our product candidates are the result of our expertise in developing new monoclonal antibodies, which have 
created new opportunities to potentially treat a wide range of endocrine diseases. We discover and develop innovative antibody-based 
therapeutics. Several of our antibodies have unique properties due to their interaction at allosteric sites on a specific protein rather than 
at  the  orthosteric,  or  active,  sites.  The  antibodies  are  designed  to  either  enhance  or  diminish  the  protein’s  activity  as  desired.   We 
believe  allosteric  modulating  antibodies  may  be  more  selective  and  offer  a  safety  advantage  in  certain  disease  indications  when 
compared to more traditional modes of action. 

Our business efforts are focused on advancing the assets in our portfolio of compounds that could treat a variety of endocrine 
diseases.    Our  product  candidates  are  in  various  stages  of  development  and  are  subject  to  regulatory  approval  before  they  can  be 
commercially launched.  

We  currently  have  five  assets  in  our  endocrine  portfolio,  two  of  which  were  developed  as  part  of  our  proprietary  XOMA 
Metabolism (“XMet”) platform. We believe the XMet platform is highly novel as it targets the insulin receptor and has generated new 
classes of fully human allosteric modulating monoclonal antibodies known as Selective Insulin Receptor Modulators (“SIRMs”). One 
program of SIRMs produced by the XMet Platform is a negative allosteric modulator of the insulin receptor (“XMetD”). We intend to 
advance the following two antibodies derived from the XMetD program, which presents potential new therapeutic approaches to the 
treatment of diseases that involve insulin and result in severe hypoglycemia.  

(cid:120) 

(cid:120) 

XOMA 358, a potential long-acting treatment for hyperinsulinemic hypoglycemia; and 

XOMA 129, a potential rapid onset, short-acting treatment for severe acute hypoglycemia. 

1 

 
 
Our endocrine portfolio also includes what we believe is a Phase 2-ready product candidate, XOMA 213, targeting the prolactin 
receptor  as  well  as  research-stage  programs  targeting  the  parathyroid  receptor  (“PTH1R”)  and  the  adrenal  corticotropic  hormone 
(“ACTH”). 

Given our focus on endocrine diseases, we have determined that gevokizumab no longer fits our strategic focus and we have 
decided  to  stop  all  development  activities  on  the  asset.  As  a  result,  we  are  closing  the  Phase  3  program  in  patients  suffering  from 
pyoderma gangrenosum (“PG”) and will immediately pursue licensing discussions with potential interested parties. 

Organization 

We were incorporated in Delaware in 1981 and became a Bermuda-exempted company in December 1998.  Effective December 
31,  2011,  we  changed  our  jurisdiction  of  incorporation  from  Bermuda  to  Delaware  and  changed  our  name  from  XOMA  Ltd.  to 
XOMA  Corporation.    When  referring  to  a  time  or  period  before  December  31,  1998,  or  when  the  context  so  requires,  the  terms 
“Company”  and  “XOMA”  refer  to  XOMA  Corporation,  a  Delaware  corporation,  and  when  referring  to  a  time  or  period  after 
December 31, 1998, and before December 31, 2011, such terms refer to XOMA Ltd., a Bermuda company. 

Corporate Strategy  

We  are  committed  to  establishing  XOMA  as  a  commercial  organization  in  the  United  States  with  a  portfolio  of  endocrine 
therapies that were discovered by our scientists and developed internally. Our commercialization strategy will be to market products in 
the  United  States  through  our  own  focused  sales  teams  calling  on  specialist  prescribers.  We  will  likely  seek  development  and 
commercialization  partners  outside  of  the  United  States,  as  our  product  candidates  could  benefit  patients  around  the  world.    For 
indications requiring clinical studies that are prohibitively large or for the targeted patient populations are not treated by the specialist 
provider,  we  will  likely  seek  a  development  and  commercialization  partner,  globally  or  regionally.  Additionally,  we  may  seek  to 
expand  our  pipeline  by  developing  additional  proprietary  products  and  technologies  and  by  entering  into  additional  licensing  and 
collaborative arrangements with pharmaceutical and biotechnology companies.  

Proprietary Products 

As part of our strategy, we are focusing our technology and resources on advancing our emerging proprietary pipeline. Below is 

a summary of our proprietary products: 

(cid:120) 

XOMA  358  is  a  fully  human  negative  allosteric  modulating  insulin  receptor  antibody  that  was  derived  from  our 
proprietary  XMet  platform.  We  are  investigating  this  antibody  as  a  novel  treatment  for  non-drug-induced,  endogenous 
hyperinsulinemic hypoglycemia (low blood glucose caused by excessive insulin produced by the body).  There are several 
rare disease indications that may benefit from XOMA 358 that are of greatest interest to us: congenital hyperinsulinism 
(“CHI”),  a  hereditary  disease  resulting  in  lack  of  insulin  regulation  and  profound  hypoglycemia,  and  post-meal 
hypoglycemia in post-bariatric surgery (“PBS”) patients. XOMA 358 has successfully completed Phase 1 testing, which 
showed the antibody reduced insulin sensitivity and decreased glucose after exogenous insulin injection and it appeared to 
be well tolerated, with no serious adverse events observed.  The results were presented at the Endocrine Society's Annual 
Meeting in March 2015.  In June 2015, we were granted Orphan Drug Designation for XOMA 358 by the FDA for the 
treatment of CHI. In October 2015, we initiated a single-dose Phase 2 proof-of-concept (“POC”) study of XOMA 358 in 
patients  with  CHI.    In  addition,  we  intend  to  initiate  a  single-administration  Phase  2  POC  study  in  PBS  patients  who 
experience hyperinsulinism. We believe a therapy that safely and effectively mitigates insulin-induced hypoglycemia has 
the  potential  to  address  a  significant  unmet  therapeutic  need  for  these  rare  medical  conditions  associated  with 
hyperinsulinism. 

2 

 
(cid:120) 

(cid:120) 

XOMA 129  is  a  highly  potent  fragment  of  a  monoclonal  antibody  (“Fab”)  with  negative  allosteric  modulation  activity 
against  the  insulin  receptor.  In  animal  model  testing,  it  appears  to  have  a  fast-onset  of  action  and  short  half-life. 
Hypoglycemia is a serious medical condition in patients with Type 2 diabetes mellitus (“T2 DM”) and Type 1 diabetes 
mellitus  (“T1  DM”)  and  can  occur  as  a  result  of  insulin  therapy,  accidental  insulin  overdose  or  treatment  with 
sulfonylureas.  Recurrent  hypoglycemia  leads  to  diminished  recognition  of  the  symptoms,  which  include  palpitations, 
tremors, anxiety, sweating, and hunger. This reduced sensitivity to hypoglycemic symptoms can lead to more prolonged 
episodes and the advancement into acute severe hypoglycemia, which can result in confusion, loss of consciousness, and 
seizure.  Acute severe hypoglycemia often presents during the nocturnal hours in patients who are treated aggressively for 
their T1 DM, which puts them at elevated risk for loss of consciousness and seizure. The  medical community has long 
been challenged with how to prevent patients from experiencing nocturnal acute severe hypoglycemia, yet there have not 
been  any  significant  breakthroughs  in  pharmaceutical  development  efforts  or  experiments  in  dietary  practices.  We  are 
conducting  preclinical  testing  for  XOMA  129  and  intend  to  advance  it  into  Phase  1  testing  as  soon  as  practicable.  We 
believe  XOMA  129  could  potentially  offer  clinicians  a  therapy  that  has  rapid  onset,  improved  efficacy  and  optimal 
duration of therapy to treat patients with acute severe hypoglycemia wherein currently available therapies are inadequate. 

XOMA 213 (formerly LFA 102) is a first-in-class allosteric inhibitor of prolactin action.  It is a humanized IgG1-Kappa 
monoclonal  antibody  that  binds  to  the  extracellular  domain  of  the  human  prolactin  receptor  with  high  affinity  at  an 
allosteric site.  The antibody has been shown to inhibit prolactin-mediated signaling, and it is potent and similarly active 
against several animal and human prolactin receptors. We discovered XOMA 213 under our collaboration with Novartis 
AG (“Novartis,” formerly Chiron Corporation), and we exercised our right to bring the product back into our portfolio to 
develop it for diseases of hyperprolactinemia. In particular, we are developing our product for prolactinoma, a condition 
of  benign  tumors  on  the  pituitary  gland  that  leads  to  hyperprolactinemia-induced  sexual  dysfunction,  infertility,  and 
osteoporosis, as well as anti-psychotic-induced hyperprolactinemia, a side effect seen in patients treated with commonly 
used  antipsychotics,  antidepressants,  and  pain  medications.  For  20  percent  of  the  140,000  prolactinoma  patients  in  the 
United States, existing therapies are poorly tolerated or not amenable to treatment with existing therapy. Anti-psychotic-
induced hyperprolactinemia is a side effect seen in patients treated with commonly used antipsychotics, antidepressants, 
and pain medications. As patients exhibit the same signs and symptoms as prolactinoma, compliance with anti-psychotic 
therapies is poor. Currently available therapies to address these side effects can worsen psychosis.  We intend to launch a 
POC  study  for  XOMA  213,  which,  if  successful,  will  allow  us  to  advance  the  compound  into  a  Phase  2  study  for 
prolactinoma and potentially into anti-psychotic medication-induced hyperprolactinemia. 

(cid:120) 

Gevokizumab is a potent humanized monoclonal antibody with unique allosteric properties that has the potential to treat 
patients  with  a  wide  variety  of  inflammatory  diseases.    Gevokizumab  binds  strongly  to  IL-1  beta,  a  pro-inflammatory 
cytokine.  By  binding  to  IL-1  beta,  gevokizumab  modulates  the  activation  of  the  IL-1  receptor,  thereby  preventing  the 
cellular signaling events that produce inflammation. 

In  December  2010,  we  entered  into  an  agreement  with  Les  Laboratories  Servier  to  jointly  develop  and  commercialize 
gevokizumab in multiple indications. Under the terms of that agreement, Servier has worldwide rights to gevokizumab for 
cardiovascular disease and diabetes indications (cardiometabolic field) and rights outside the United States and Japan to 
all other indications.  

On  July  22,  2015,  we  announced  the  Phase  3  EYEGUARD-B  study  of  gevokizumab  in  patients  with  Behçet’s  disease 
uveitis did not meet the primary endpoint of time to first acute ocular exacerbation. Due to these results and belief they 
would be predictive of results in our other EYEGUARD studies of gevokizumab in patients with non-infectious uveitis 
(“NIU”),  in  August  we  announced  our  intention  to  end  the  EYEGUARD  global  Phase  3  program  prior  to  its  planned 
completion. Servier and we closed down the EYEGUARD clinical sites and, as anticipated, neither EYEGUARD-A nor 
EYEGUARD-C produced positive results. 

In  September  2015,  Servier  notified  XOMA  of  its  intention  to  terminate  the  Amended  and  Restated  Collaboration  and 
License  Agreement,  and  return  the  worldwide  gevokizumab  rights  to  XOMA.  Termination  of  the  Agreement  will  be 
effective on March 25, 2016.  

In March 2016, we announced we are closing our Phase 3 study of gevokizumab in PG.  A preliminary review of the data 
from the study did not show a clear signal of activity in PG. 

(cid:120) 

Preclinical  Product  Pipeline:    We  are  pursuing  additional  opportunities  to  further  broaden  our  preclinical  product 
pipeline,  including  internal  discovery  programs  focused  on  endocrine  indications.    One  is  an  anti-PTH1R  program.  
Hyperparathyroidism results in significant hypercalcemia causing fatigue, loss of appetite, confusion, nausea, and muscle 
weakness.  While most can be treated surgically, 10 percent of the patient population does not respond to surgery.  We 
have  identified  PTH1R  inhibitors  and  are  in  the  process  of  attempting  to  identify  a  lead  compound  to  move  into  pre-
clinical  testing.    Another  research  program  is  focused  on  ACTH.    Inappropriate  secretion  of  ACTH  leads  to  excess 
cortisol,  which  can  lead  to  Cushing's  disease.  We  have  identified  potent  ACTH  inhibitors  and  are  testing  for  in  vivo 
activity in preclinical models. 

3 

Partnership and Licensed Products 

Historically,  we  have  provided  research  and  development  collaboration  services  for  world-class  organizations,  including 
Novartis, Novo Nordisk and Takeda, in pursuit of new antibody products.  In more recent years, we have evolved our business focus 
from a service provider model to a proprietary product development model. However, we expect that we will continue to capitalize on 
partnered product arrangements as opportunities arise. Below is a list of such partnerships: 

(cid:120) 

(cid:120) 

(cid:120) 

Therapeutic  Antibodies  with  Novartis  In  September  2015,  we  entered  into  a  license  agreement  with  Novartis 
International Pharmaceutical Ltd. (“Novartis International”) for our transforming growth factor beta (TGF-beta) antibody 
program. Novartis International will have worldwide rights to the TGF-beta program and will be solely responsible for the 
development  and  commercialization  of  the  antibodies.  We  may  receive  potential  milestones  and  royalties  on  sales  of 
antibody products in the future.  

In November 2008, we restructured our product development collaboration with Novartis, which was entered into in 2004 
with  Novartis  (then  Chiron  Corporation).    Under  the  restructured  agreement,  Novartis  received  control  over  the  two 
ongoing  programs  relating  to  CD40  and  prolactin  receptor.  Control  of  the  prolactin  receptor  antibody  program  was 
returned  to  us  in  2014.  In  September  2015,  we  and  Novartis  Vaccines  and  Diagnostics,  Inc.  (“NVDI”),  executed  an 
amendment  to  their  Amended  and  Restated  Research,  Development  and  Commercialization  Agreement  dated  July  1, 
2008, as amended, relating to anti-CD40 antibodies. The parties agreed to reduce the royalty rates that we are eligible to 
receive on sales of Novartis’ clinical stage anti-CD40 antibodies. These royalties are tiered based on sales levels and now 
range from a mid-single digit percentage rate to up to a low double-digit percentage rate.  

Therapeutic  Antibodies  with  Novo  Nordisk  In  December  2015,  we  entered  into  an  exclusive,  worldwide,  royalty-
bearing license with Novo Nordisk for the XMetA program of allosteric monoclonal antibodies that positively modulate 
the insulin receptor. Novo Nordisk will have worldwide rights to the XMetA program and will be solely responsible for 
the  development  and  commercialization  of  antibodies  and  products,  and  we  retained  commercialization  rights  for  all 
indications considered rare. We may receive potential milestones and royalties on sales of antibody products in the future. 

Therapeutic Antibodies with Takeda: Since 2006, Takeda has been a collaboration partner for therapeutic monoclonal 
antibody  discovery  and  development  against  multiple  targets  selected  by  them.    In  February  2009,  we  expanded  our 
existing collaboration to provide Takeda with access to multiple antibody technologies, including a suite of research and 
development  technologies  and  integrated  information  and  data  management  systems.    We  may  receive  potential 
milestones and royalties on sales of antibody products in the future. 

Technologies 

We have a unique set of antibody discovery, optimization and development technologies, including: 

(cid:120) 

ADAPT™  (Antibody  Discovery  Advanced  Platform  Technologies):  proprietary  phage  display  libraries  integrated  with 
yeast and mammalian display to enable antibody discovery; 

(cid:120)  ModulX™: technology that enables identification of allosteric antibodies for positive or negative modulation of biological 

pathways; and 

(cid:120) 

OptimX™:  technologies  used  for  optimizing  biophysical  properties  of  antibodies,  including  affinity,  immunogenicity, 
stability and manufacturability. 

Technology Licenses 

Below is a summary of certain proprietary technologies owned by us and available for licensing to other companies: 

(cid:120) 

Antibody  Discovery  Technologies:  We  use  human  antibody  phage  display  libraries,  integrated  with  yeast  and 
mammalian display, which we call ADAPT™ Integrated Display, in our antibody discovery programs. We offer access to 
this  platform,  including  novel  phage  libraries  developed  internally,  as  part  of  our  collaboration  business.    We  believe 
access to ADAPT™ Integrated Display offers a number of benefits to us and our collaboration partners because it enables 
us  to  combine  the  diversity  of  phage  libraries  with  accelerated  discovery  due  to  rapid  immunoglobulin  (“IgG”) 
reformatting  and  Fluorescence-Activated  Cell  Sorting  (“FACS”)  based  screening  using  yeast  and  mammalian  display. 
This increases the probability of technical and business success in finding rare and unique functional antibodies directed 
to targets of interest. 

4 

 
(cid:120)  ModulX™  technology:  ModulX™  technology  allows  modulation  of  biological  pathways  using  monoclonal  antibodies 
and  offers  insights  into  regulation  of  signaling  pathways,  homeostatic  control,  and  disease  biology.  Using  ModulX™, 
XOMA is generating product candidates with novel mechanisms of action that specifically alter the kinetics of interaction 
between  molecular  constituents  (e.g.  receptor-ligand).  ModulX™  technology  enables  expanded  target  and  therapeutic 
options and offers a unique approach in the treatment of disease. 

(cid:120) 

OptimX™ technologies: 

Human  Engineering™  (“HE™”):  HE™  is  a  proprietary  humanization  technology  that  allows  modification  of  non-
human  monoclonal  antibodies  to  reduce  or  eliminate  detectable  immunogenicity  and  make  them  suitable  for  medical 
purposes in humans.  The technology uses a unique method developed by us, based on analysis of the conserved structure-
function  relationships  among  antibodies.    The  method  defines  which  residues  in  a  non-human  variable  region  are 
candidates to be modified.  The result is an HE™ antibody with preserved antigen binding, structure and function that has 
eliminated or greatly reduced immunogenicity.  HE™ technology was used in development of gevokizumab and is used in 
the development of certain other antibody products. 

Targeted Affinity Enhancement™ (“TAE™”): TAE™ is a proprietary technology involving the assessment and guided 
substitution of amino acids in antibody variable regions, enabling efficient optimization of antibody binding affinity and 
selectivity.  TAE™ generates a comprehensive map of the effects of amino acid mutations in the CDR region likely to 
impact binding.  The technology is utilized by XOMA scientists and has been licensed to a number of our collaborators. 

(cid:120) 

Flexible  Manufacturing: This  patented  technology  relates  to  a  flexible  arrangement  of  mobile  clean  rooms  (“MCRs”) 
within  a  manufacturing  facility,  with  each  MCR  providing  a  portable,  self-contained  environment  that  allows  for  drug 
development. The facility design allows MCRs to connect easily and quickly to a central supply of utilities such as air, 
water, and electricity. This unique arrangement facilitates flexible manufacturing and eliminates change-over downtime. 
This  translates  into  significantly  reduced  capital  expenditures,  production  costs,  and  maintenance  costs  while  offering 
meaningful time advantages  over conventional  manufacturing facilities. When MCRs are not in  use, they can be easily 
moved  to  cleaning/refurbishing  areas  and  prepared  MCRs  can  be  "plugged  in"  for  manufacturing.  The  flexible 
manufacturing system can be applied to fields as diverse as pharmaceuticals, biologics, and electronics. 

Financial and Legal Arrangements of Product Collaborations, Licensing and Other Arrangements 

Collaboration and Licensing Agreements 

Servier – Gevokizumab 

In  December  2010,  we  entered  into  a  license  and  collaboration  agreement  (the  “Collaboration  Agreement”)  with  Servier  to 
jointly  develop  and  commercialize  gevokizumab  in  multiple  indications.  Under  the  terms  of  the  Collaboration  Agreement,  Servier 
obtained  worldwide  rights  to  cardiovascular  disease  and  diabetes  indications  (cardiometabolic  field)  and  rights  outside  the  United 
States and Japan to all other indications, including NIU, Behçet’s disease uveitis and other inflammatory and oncology indications. 
XOMA retained development and commercialization rights in the United States and Japan for all indications other than cardiovascular 
disease  and  diabetes.  Each  party  had  the  right  in  certain  circumstances  to  pursue  development  in  indications  not  specified  in  the 
agreement, and in such event, the other party  had certain options to participate in such  development, including reimbursement of a 
portion of the developing party’s expenses. 

We also entered into a loan agreement with Servier (the “Servier Loan Agreement”) that provided for an advance of up to €15.0 
million.  The  loan  was  fully  funded  in  January  2011,  with  the  proceeds  converting  to  approximately  $19.5  million  at  the  date  of 
funding.  The  loan  is  secured  by  an  interest  in  XOMA’s  intellectual  property  rights  to  all  gevokizumab  indications  worldwide, 
excluding certain rights in the United States and Japan. Interest is calculated at a floating rate based on a Euro Inter-Bank Offered Rate 
(“EURIBOR”) and is subject to a cap. The interest rate is reset semi-annually in January and July of each year. The interest rate for the 
initial interest period was 3.22% and was reset semi-annually ranging from 2.05% to 3.83%. Interest for the six-month period from 
mid-January 2015 through mid-July 2015 was reset to 2.16%. Interest is payable semi-annually; however, the Servier Loan Agreement 
provided for a deferral of interest payments over a period specified in the agreement. During the deferral period, accrued interest was 
added  to  the  outstanding  principal  amount  for  the  purpose  of  interest  calculation  for  the  next  six-month  interest  period.  On  the 
repayment  commencement  date,  all  unpaid  and  accrued  interest  was  paid  to  Servier,  and  thereafter,  all  accrued  and unpaid  interest 
shall be due and payable at the end of each six-month period. In January 2016, we paid $0.2 million in accrued interest to Servier as 
well as the principal amount then due as described below. 

5 

On January 9, 2015, Servier and we entered into Amendment No. 2 (“Loan Amendment”) to the Servier Loan Agreement. The 
Loan Agreement was initially entered into on December 30, 2010 and subsequently amended by a Consent, Transfer, Assumption and 
Amendment  Agreement  entered  into  as  of  August  12,  2013.  The  Loan  Amendment  extended  the  maturity  date  of  the  loan  from 
January 13, 2016 to three tranches of principal to be repaid as follows:€3.0 million on January 15, 2016, €5.0 million on January 15, 
2017,  and  €7.0  million  on  January  15,  2018.  In  addition,  the  loan  becomes  immediately  due  and  payable  upon  certain  customary 
events of default. At December 31, 2015, the outstanding principal balance under this loan was $16.4 million using the December 31, 
2015 Exchange Rate of 1.091.   

On September 28, 2015, Servier notified us of its intention to terminate the Collaboration Agreement, as amended and return the 
gevokizumab rights to us. The termination will be effective on March 25, 2016, and does not result in a change to the maturity date of 
our loan with Servier. As we will no longer be required to provide services to Servier under the Collaboration Agreement beyond the 
effective  date,  we  will  amortize  the  remaining  deferred  revenue  through  March  25,  2016.  As  of  December  31,  2015,  the  deferred 
revenue – current associated with this collaboration was $0.6 million. All such deferred revenue is expected to be recognized in the 
first quarter of 2016. 

NIAID 

In  September  2008,  we  were  awarded  a  third  NIAID  contract  for  $64.8  million  under  Contract  No.  HHSN272200800028C 
(“NIAID  3”)  to  continue  development  of  our  anti-botulinum  antibody  product  candidates,  including  XOMA  3AB  and  additional 
product candidates directed against the B and E toxin serotypes.  As part of the contract, we have developed, evaluated and produced 
the clinical supplies to support an Investigational New Drug (“IND”) application filing with the FDA for XOMA 3AB. A Phase 1 trial 
was completed on XOMA 3AB, with no product-related serious adverse events.  Subsequently, XOMA manufactured XOMA 3B and 
XOMA 3E, which are currently on stability and are in the process of IND preparation. 

In October 2011, we announced we had been awarded a fourth NIAID contract for up to $28.0 million over five years under 
Contract  No.  HHSN  272201100031C  (“NIAID  4”)  to  develop  broad-spectrum  antitoxins  for  the  treatment  of  human  botulism 
poisoning directed against the C and D toxin serotypes.  

Takeda 

In November 2006,  we entered into a fully  funded collaboration agreement  with Takeda for therapeutic  monoclonal antibody 
discovery and development activities under which we agreed to discover and optimize therapeutic antibodies against multiple targets 
selected  by  Takeda.    Takeda  agreed  to  make  up-front,  annual  maintenance  and  milestone  payments  to  us,  fund  our  research  and 
development  and  manufacturing  activities  for  preclinical  and  early  clinical  studies  and  pay  royalties  on  sales  of  products  resulting 
from  the  collaboration.    Takeda  is  responsible  for  clinical  trials  and  commercialization  of  drugs  after  an  IND  submission  and  is 
granted the right to manufacture once a product enters into Phase 2 clinical trials.  We have completed a technology transfer and do 
not  expect  to  perform  any  further  research  and  development  services  under  this  program.  From  2011  through  2015,  we  received 
milestone payments relating to one currently active program. 

Under  the  terms  of  this  agreement,  we  may  receive  milestone  payments  aggregating  up  to  $19.0  million  relating  to  one 
undisclosed  product  candidate  and  low  single-digit  royalties  on  future  sales  of  all  products  subject  to  this  license.    Our  right  to 
milestone payments expires on the later of the receipt of payment from Takeda of the last amount to be paid under the agreement or 
the cessation by Takeda of all research and development activities with respect to all program antibodies, collaboration targets and/or 
collaboration products.  Our right to royalties expires on the later of 13.5 years from the first commercial sale of each royalty-bearing 
discovery product or the expiration of the last-to-expire licensed patent. 

In  February  2009,  we  expanded  our  existing  collaboration  to  provide  Takeda  with  access  to  multiple  antibody  technologies, 
including  a  suite  of  research  and  development  technologies  and  integrated  information  and  data  management  systems.    We  may 
receive milestones of up to $3.3 million per discovery product candidate and low single-digit royalties on future sales of all antibody 
products subject to this license.  Our right to milestone payments expires on the later of the receipt of payment from Takeda of the last 
amount  to  be  paid  under  the  agreement  or the  cessation  by  Takeda  of  all  research  and  development  activities  with  respect  to  all 
program antibodies, collaboration targets and/or collaboration products.  Our right to royalties expires on the later of 10 years from the 
first commercial sale of such royalty-bearing discovery product or the expiration of the last-to-expire licensed patent. 

6 

Novartis – Anti-CD40 Antibody 

In  November  2008,  we  restructured  our  product  development  collaboration  with  Novartis.  Under  the  restructured  agreement, 
Novartis made a payment to us of $6.2 million in cash and reduced our existing debt by $7.5 million; agreed to fund all future research 
and development expenses; agreed to pay potential milestones of up to $14.0 million and royalty rates ranging from low-double-digit 
to high-teen percentage rates for certain antibody products binding to CD40 or prolactin receptor antibody programs; and has provided 
us with options to develop or receive royalties on four additional programs. In exchange, Novartis received control over the CD40 and 
prolactin  receptor  antibody  programs,  as  well  as  the  right  to  expand  the  development  of  these  programs  into  additional  indications 
outside of oncology. Novartis has initiated clinical studies to test CFZ533, an anti-CD40 antibody arising from its collaboration with 
XOMA,  in  de  novo  renal  transplantation,  Primary  Sjögren's  Syndrome  and  in  moderate  to  severe  myasthenia  gravis.  Novartis  has 
returned  control  of  the  prolactin  receptor  antibody  program,  XOMA  213,  to  us  and  we  are  evaluating  options  for  its  continued 
development. In 2013, we received a $7.0 million milestone relating to one currently active program. Our right to milestone payments 
expires at such time as no collaboration product or former collaboration product is being developed or commercialized anywhere in 
the world and no royalty payments on these products are due. Our right to royalty payments expires on the later of the expiration of 
any licensed patent covering each product or 10 years from the launch of each product. 

In September 2015, we and Novartis Vaccines and Diagnostics, Inc. (“NVDI”), executed an amendment to their Amended and 
Restated Research, Development and Commercialization Agreement dated July 1, 2008, as amended, relating to anti-CD40 antibodies. 
The parties agreed to reduce the royalty rates that we are eligible to receive on sales of Novartis’ clinical stage anti-CD40 antibodies. 
These  royalties  are  tiered  based  on  sales  levels  and  now  range  from  a  mid-single  digit  percentage  rate  to  up  to  a  low  double-digit 
percentage rate. 

In connection  with the collaboration between XOMA and  Novartis (then Chiron  Corporation), a secured note agreement  was 
executed in May 2005.  The note agreement is secured by our interest in the collaboration and was due and payable in full in June 
2015. On June 19, 2015, we and Novartis Vaccines Diagnostics, Inc. (“NVDI”), who assumed the note agreement, agreed to extend 
the maturity date of our secured note agreement from June 21, 2015 to September 30, 2015, which was then subsequently extended to 
September 30, 2020. At December 31, 2015, the outstanding principal balance under this note agreement totaled $13.7 million and 
was  included  in  our  long-term  portion  of  interest  bearing  obligations  in  our  consolidated  balance  sheet  as  of  December  31,  2015. 
Pursuant  to  the  terms  of  the  arrangement  as  restructured  in  November  2008,  we  will  not  make  any  additional  borrowings  on  the 
Novartis note. 

Novartis – Anti-TGF(cid:533) Antibody 

In  September  2015,  we  and  Novartis  International  Pharmaceutical  Ltd.  (“Novartis  International”)  entered  into  a  license 
agreement (the “License Agreement”) pursuant to which we granted Novartis International an exclusive, worldwide, royalty-bearing 
license  to  our  anti-transforming  growth  factor  beta  (“TGF-beta”)  antibody  program.  Under  the  terms  of  the  License  Agreement, 
Novartis International obtained worldwide rights to the TGF-beta antibody program and is solely responsible for the development and 
commercialization of antibodies and products containing antibodies arising from the TGF-beta antibody program.   

Under the License Agreement, we received a $37 million upfront fee. We are eligible to receive up to a total of $480 million in 
development, regulatory and commercial milestones. We also are eligible to receive royalties on sales of licensed products, which are 
tiered based on sales levels and range  from a  mid-single digit percentage rate to up to a low double-digit percentage  rate. Novartis 
International’s obligation to pay royalties with respect to a particular product and country will continue for the longer of the date of 
expiration of the last valid patent claim covering the product in that country, or ten years from the date of the first commercial sale of 
the product in that country. 

The License Agreement contains customary termination rights relating to material breach by either party. Novartis International 
also  has  a  unilateral  right  to  terminate  the  License  Agreement  on  an  antibody-by-antibody  and  country-by-country  basis  or  in  its 
entirety on one hundred eighty days’ notice. 

Pfizer 

In  August  2007,  we  entered  into  a  license  agreement  (the  “2007  Agreement”)  with  Pfizer  Inc.  (“Pfizer”)  for  non-exclusive, 
worldwide  rights  for  our  patented  bacterial  cell  expression  technology  for  research,  development  and  manufacturing  of  antibody 
products. Under the terms of the 2007 Agreement, we received a license fee payment of $30.0 million in 2007. 

7 

From 2011 through 2015, we have received milestone payments, and we were also eligible for additional milestone payments 
and  low  single-digit  royalties  on  future  sales  of  all  products  subject  to  this  license.  In  addition,  we  were  also  eligible  to  receive 
potential milestone payments aggregating up to $1.7 million for each additional qualifying product candidate. Our right to milestone 
payments would expire on the later of the expiration of the last-to-expire licensed patent or the tenth anniversary of the effective date. 
Our right to royalties  would  expire upon the expiration of the last-to-expire licensed patent.   In  December 2015,  we  entered into a 
settlement  and  amended  license  agreement  with  Pfizer,  pursuant  to  which  we  granted  Pfizer  a  fully-paid,  royalty-free,  worldwide, 
irrevocable,  non-exclusive  license  rights  to  XOMA’s  patented  bacterial  cell  expression  technology  for  phage  display  and  other 
research, development and manufacturing of antibody products for cash payment by Pfizer of $3.8 million in full satisfaction of all 
obligations  to us  under the  August 27, 2007 License  Agreement between  XOMA Ireland Limited and Pfizer Inc,  including but  not 
limited to potential milestone, royalty and other fees under the 2007 Agreement.  

In  August  2005,  we  entered  into  a  license  agreement  with  Wyeth  (subsequently  acquired  by  Pfizer)  for  non-exclusive, 
worldwide rights for certain of XOMA’s patented bacterial cell expression technology for vaccine manufacturing. Under the terms of 
this agreement, we received a milestone payment in November 2012 relating to TRUMENBA®, a meningococcal group B vaccine 
marketed by Pfizer. We  receive a fraction of a percentage of sales of TRUMENBA as royalties. Our right to royalties expires on a 
country-by-country basis upon the later of the expiration of the last-to-expire licensed patent or 10 years from the first commercial sale 
of TRUMENBA. 

Novo Nordisk 

In December 2015, we entered into a license agreement with Novo Nordisk A/S (“Novo Nordisk ”) pursuant to which we have 
granted  to  Novo  Nordisk  an  exclusive,  world-wide,  royalty-bearing  license  to  XOMA’s  XMetA  program  of  allosteric  monoclonal 
antibodies that positively modulate the insulin receptor (the “XMetA Program”), subject to our retained commercialization rights for 
rare disease indications. Novo Nordisk has an option to add these additional rights to its license upon payment of an option fee. 

Novo  Nordisk  will  have  worldwide  rights  to  the  XMetA  Program  and  will  be  solely  responsible  for  its  expenses  for  the 
development and commercialization of antibodies and products containing antibodies arising from the XMetA Program, subject to the 
our retained rights described above. We have transferred certain proprietary know-how and materials relating to the XMetA Program 
to Novo Nordisk. Under the agreement,  we received a $5.0 million, non-creditable, non-refundable, upfront payment. Based on the 
achievement  of  pre-specified  criteria,  we  are  eligible  to  receive  up  to  $290.0  million  in  development,  regulatory  and  commercial 
milestones. We are also eligible to receive royalties on sales of licensed products, which are tiered up to a high single digit percentage 
rate based on sales levels. Novo Nordisk’s obligation to pay development and commercialization milestones will continue for so long 
as Novo Nordisk is developing or selling products under the agreement, subject to the maximum milestone payment amounts set forth 
above. Novo Nordisk’s obligation to pay royalties with respect to a particular product and country will continue for the longer of the 
date of expiration of the last valid patent claim covering the product in that country, or ten years from the date of the first commercial 
sale of the product in that country. 

The  agreement  contains  customary  termination  rights  relating  to  material  breach  by  either  party.  Novo  Nordisk  also  has  a 

unilateral right to terminate the agreement in its entirety on ninety (90) days’ notice. 

Sale of Manufacturing Facility and Biodefense Assets  

On  November  4,  2015,  we  entered  into  an  asset  purchase  agreement  (the  “Nanotherapeutics  Purchase  Agreement”)  with 
Nanotherapeutics, pursuant to which Nanotherapeutics agreed, subject to the terms and conditions set forth in the Nanotherapeutics 
Purchase Agreement, to acquire our biodefense business and related assets (including, subject to regulatory approval, certain contracts 
with the U.S.  government), and to assume certain liabilities of XOMA (the  “Transaction”).   As part of the Transaction, the parties 
will,  subject  to  the  terms  and  conditions  of  the  asset  purchase  agreement  and  the  satisfaction  of  certain  conditions,  enter  into  an 
intellectual property license agreement (the “License Agreement”), pursuant to which we agree to license to Nanotherapeutics, subject 
to  the  terms  and  conditions  set  forth  in  the  License  Agreement,  certain  intellectual  property  rights  related  to  the  purchased  assets. 
Under the License Agreement, we are eligible for up to $4.5 million of cash payments upon Nanotheraputics’ execution of a contract 
with the Defense Threat Reduction Agency. In addition, we are eligible to receive 15% royalties on net sales of products.  

8 

 On November 5, 2015, we entered into an asset purchase agreement (the “Agenus Purchase Agreement”) with Agenus West, 
LLC, a wholly-owned subsidiary of Agenus Inc. (“Agenus”), pursuant to which Agenus agreed, subject to the terms and conditions set 
forth  in  the  Agenus  Purchase  Agreement,  to  acquire  our  pilot  scale  manufacturing  facility  in  Berkeley,  California,  together  with 
certain  related  assets,  including  a  license  to  certain  intellectual  property  related  to  the  purchased  assets,  and  to  assume  certain 
liabilities of XOMA, in consideration for the payment to us of up to $5.0 million in cash and the issuance to us of shares of Agenus’s 
common stock having an aggregate value of up to $1.0 million.  The Agenus Purchase Agreement closed on December 31, 2015. At 
closing,  we  received  cash  of  $4.7  million,  net  of  the  assumed  liabilities  of  $0.3  million.  In  addition  to  the  cash  consideration,  we 
received  109,211  shares  of  common  stock  of  Agenus  with  an  aggregate  value  of  $0.5  million.  The  remaining  common  stock  of 
Agenus will only be received upon our satisfaction of certain operational matters, which we may or may not be able to satisfy.  

Financing Agreements 

Hercules Loan and Security Agreement 

In  February  2015,  we  entered  into  a  Loan  and  Security  Agreement  with  Hercules,  (the  “Hercules  Loan  Agreement”)  under 
which  we  borrowed  $20.0  million.  We  used  a  portion  of  the  proceeds  received  under  the  Hercules  Loan  Agreement  to  repay  the 
outstanding principal, final payment fee, prepayment fee, and accrued interest of $5.5 million under our loan agreement with General 
Electric Capital Corporation. 

The interest rate under the Hercules Loan Agreement will be calculated at a rate equal to the greater of either (i) 9.40% plus the 
prime rate as reported from time to time in The Wall Street Journal minus 7.25%, and (ii) 9.40%.  Payments under the Hercules Loan 
Agreement are interest only until one month prior to the Amortization Date, defined as July 1, 2016. The interest only period will be 
followed by equal  monthly payments of principal and interest amortized over a 30  month  schedule through the scheduled  maturity 
date  of  September  1,  2018  (the  “Hercules  Loan  Maturity  Date”).  The  entire  principal  balance,  including  a  balloon  payment  of 
principal,  as  applicable,  will  be  due  and  payable  on  the  Hercules  Loan  Maturity  Date.  In  addition,  a  final  payment  equal  to  $1.2 
million  will  be  due  on  the  Hercules  Loan  Maturity  Date,  or  such  earlier  date  specified  in  the  Hercules  Loan  Agreement.  Our 
obligations  under  the  Hercules  Loan  Agreement  are  secured  by  a  security  interest  in  substantially  all  of  our  assets,  other  than  our 
intellectual property. 

If  we  prepay  the  loan  prior  to  the  Hercules  Loan  Maturity  Date,  we  will  pay  Hercules  a  prepayment  charge,  based  on  a 
prepayment fee equal to 3.00% of the amount prepaid, if the prepayment occurs in any of the first 12 months following the closing 
date, 2.00% of the amount prepaid, if the prepayment occurs after 12 months from the closing date but prior to 24 months from the 
closing date, and 1.00% of the amount prepaid if the prepayment occurs after 24 months from the closing date. 

The  Hercules  Loan  Agreement  includes  customary  affirmative  and  restrictive  covenants,  but  does  not  include  any  financial 
maintenance covenants, and also includes standard events of default, including payment defaults. Upon the occurrence of an event of 
default,  a  default  interest  rate  of  an  additional  5%  may  be  applied  to  the  outstanding  loan  balances,  and  Hercules  may  declare  all 
outstanding  obligations  immediately  due  and  payable  and  take  such  other  actions  as  set  forth  in  the  Hercules  Loan  Agreement.  In 
connection with the Hercules Loan Agreement, we issued a warrant to Hercules that is exercisable for an aggregate of up to 181,268 
shares  of  XOMA  common  stock  at  an  exercise  price  of  $3.31  per  share  (the  “Hercules  Warrant”).  The  Hercules  Warrant  may  be 
exercised on a cashless basis and is exercisable for a term beginning on the date of issuance and ending on the earlier to occur of five 
years  from  the  date  of  issuance  or  the  consummation  of  certain  acquisitions  of  XOMA  as  set  forth  in  the  Hercules  Warrant.  The 
number of shares for which the Hercules Warrant is exercisable and the associated exercise price are subject to certain proportional 
adjustments as set forth in the Hercules Warrant. 

Research and Development 

Our  research  and  development  expenses  currently  include  costs  of  personnel,  supplies,  facilities  and  equipment,  consultants, 
third-party costs and other expenses related to preclinical and clinical testing.  In 2015, our research and development expenses were 
$70.9 million, compared with $80.7 million in 2014 and $74.9 million in 2013. 

Our  research  and  development  activities  can  be  divided  into  those  related  to  our  internal  projects  and  those  related  to 
collaborative  and  contract  arrangements,  which  are  reimbursed  by  our  collaborators.    In  2015,  research  and  development  expenses 
relating to internal projects were $50.2 million, compared with $51.3 million in 2014 and $47.5 million in 2013.  In 2015, research and 
development expenses related to collaborative and contract arrangements  were $20.6 million, compared  with $29.5 million in 2014 
and $27.4 million in 2013.   

9 

Competition 

The biotechnology and pharmaceutical industries are subject to continuous and substantial technological change.  Competition 
in antibody-based technologies is intense and is expected to increase as new technologies emerge and established biotechnology firms 
and  large  chemical  and  pharmaceutical  companies  continue  to  advance  in  the  field.    A  number  of  these  large  pharmaceutical  and 
chemical  companies  have  enhanced  their  capabilities  by  entering  into  arrangements  with  or  acquiring  biotechnology  companies  or 
entering into business combinations with other large pharmaceutical companies.  Many of these companies have significantly greater 
financial  resources,  larger  research  and  development  and  marketing  staffs,  and  larger  production  facilities  than  ours.    Moreover, 
certain of these companies have extensive experience in undertaking preclinical testing and human clinical trials.  These factors may 
enable other companies to develop products and processes competitive with or superior to ours.  In addition, a significant amount of 
research in biotechnology is being carried out in universities and other non-profit research organizations.  These entities are becoming 
increasingly  interested  in  the  commercial  value  of  their  work  and  may  become  more  aggressive  in  seeking  patent  protection  and 
licensing  arrangements.    Furthermore,  many  companies  and  universities  tend  not  to  announce  or  disclose  important  discoveries  or 
development  programs  until  their  patent  position  is  secure  or,  for  other  reasons,  later.    As  a  result,  we  may  not  be  able  to  track 
development of competitive products, particularly at the early stages.  There can be no assurance that developments by others will not 
render our products or technologies obsolete or uncompetitive. 

Without  limiting  the  foregoing,  we  are  aware  of  the  following  competitors  for  the  product  and  candidate  shown  in  the  table 

below.  This table is not intended to be representative of all existing competitors in the market: 

Product/Candidate 
XOMA 358 ........................................  Biodel Inc 

  Competitors 

S-cubed Limited 
Xeris Pharmaceuticals  

Government Regulation 

The  FDA  and  comparable  regulatory  agencies  in  state  and  local  jurisdictions  and  in  foreign  countries  impose  substantial 
requirements  upon  the  clinical  development,  pre-market  approval,  manufacture,  marketing,  import,  export  and  distribution  of 
biopharmaceutical  products.  These  agencies  and  other  regulatory  agencies  regulate  research  and  development  activities  and  the 
testing,  approval,  manufacture,  quality  control,  safety,  effectiveness,  labeling,  storage,  recordkeeping,  advertising  and  promotion  of 
products  and  product  candidates.  Failure  to  comply  with  applicable  FDA  or  other  regulatory  requirements  may  result  in  Warning 
Letters,  civil  or  criminal  penalties,  suspension  or  delays  in  clinical  development,  recall  or  seizure  of  products,  partial  or  total 
suspension  of  production  or  withdrawal  of  a  product  from  the  market.  The  development  and  approval  process  requires  substantial 
time, effort and financial resources, and we cannot be certain that any approvals for our product candidates will be granted on a timely 
basis, if at all. We must obtain approval of our product candidates from the FDA before we can begin marketing them in the United 
States. Similar approvals are also required in other countries. 

Product  development  and  approval  within  this  regulatory  framework  is  uncertain,  can  take  many  years  and  requires  the 
expenditure of substantial resources. The nature and extent of the governmental review process for our product candidates will vary, 
depending on the regulatory categorization of particular product candidates and various other factors. 

The necessary steps before a new biopharmaceutical product may be sold in the United States ordinarily include: 

(cid:120) 

(cid:120) 

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(cid:120) 

(cid:120) 

preclinical in vitro and in vivo tests, which must comply with Good Laboratory Practices (“GLP”); 

submission to the FDA of an IND which must become effective before clinical trials may commence, and which must be 
updated annually with a report on development; 

completion of adequate and well controlled human clinical trials to establish the safety and efficacy of the product 
candidate for its intended use; 

submission to the FDA of a biologic license application (“BLA”), which must often be accompanied by payment of a 
substantial user fee; 

FDA pre-approval inspection of manufacturing facilities for current Good Manufacturing Practices, or GMP, compliance 
and FDA inspection of select clinical trial sites for Good Clinical Practice (“GCP”), compliance; and 

FDA review and approval of the BLA and product prescribing information prior to any commercial sale. 

10 

  
The results of preclinical tests (which include laboratory evaluation as well as preclinical GLP studies to evaluate toxicity) for a 
particular product candidate, together with related manufacturing information and analytical data, are submitted as part of an IND to 
the FDA. The IND automatically becomes effective 30 days after receipt by the FDA, unless the FDA, within the 30-day time period, 
raises concerns or questions about the conduct of the clinical trial, including concerns that human research subjects will be exposed to 
unreasonable health risks. In such a case, the IND sponsor and the FDA must resolve any outstanding concerns before the clinical trial 
can begin. IND submissions may not result in FDA authorization to commence a clinical trial. A separate submission to an existing 
IND must also be made for each successive clinical trial conducted during product development. Further, an independent institutional 
review board (“IRB”), for each medical center proposing to conduct the clinical trial must review and approve the plan for any clinical 
trial before it commences at that center and it must monitor the study until completed. The FDA, the IRB, or the sponsor may suspend 
a clinical trial at any time on various grounds, including a finding that the subjects or patients are being exposed to an unacceptable 
health  risk.  Clinical  testing  also  must  satisfy  extensive  GCP  regulations  and  regulations  for  informed  consent  and  privacy  of 
individually identifiable information. 

Clinical trials generally are conducted in three sequential phases that may overlap or in some instances, be skipped. In Phase 1, 
the  initial  introduction  of  the  product  into  humans,  the  product  is  tested  to  assess  safety,  metabolism,  pharmacokinetics  and 
pharmacological actions associated with increasing doses. Phase 2 usually involves trials in a limited patient population to evaluate the 
efficacy  of  the  potential  product  for  specific,  targeted  indications,  determine  dosage  tolerance  and  optimum  dosage  and  further 
identify possible adverse reactions and safety risks. Phase 3 and pivotal trials are undertaken to evaluate further clinical efficacy and 
safety  often  in  comparison  to  standard  therapies  within  a  broader  patient  population,  generally  at  geographically  dispersed  clinical 
sites.  Phase  4,  or  post-marketing,  trials  may  be  required  as  a  condition  of  commercial  approval  by  the  FDA  and  may  also  be 
voluntarily initiated by us or our collaborators. Phase 1, Phase 2 or Phase 3 testing may not be completed within any specific period of 
time, if at all, with respect to any of our product candidates. Similarly, suggestions of safety, tolerability or efficacy in earlier-stage 
trials do not necessarily predict findings of safety and effectiveness in subsequent trials. Furthermore, the FDA, an IRB, or we may 
suspend  a  clinical  trial  at  any  time  for  various  reasons,  including  a  finding  that  the  subjects  or  patients  are  being  exposed  to  an 
unacceptable  health  risk.  Clinical  trials  are  subject  to  central  registration  and  results  reporting  requirements,  such  as  on 
www.clinicaltrials.gov. 

The  results  of  preclinical  studies,  pharmaceutical  development  and  clinical  trials,  together  with  information  on  a  product’s 
chemistry, manufacturing, and controls, are submitted to the FDA in the form of a BLA, for approval of the manufacture, marketing 
and  commercial  shipment  of  the  biopharmaceutical  product.  Data  from  clinical  trials  are  not  always  conclusive  and  the  FDA  may 
interpret data differently than we or our collaborators interpret data. The FDA also may convene an Advisory Committee of external 
advisors  to  answer  questions  regarding  the  approvability  and  labeling  of  an  application.  The  FDA  is  not  obligated  to  follow  the 
Advisory Committee’s recommendation. The submission of a BLA is required to be accompanied by a substantial user fee, with few 
exceptions or waivers. The user fee is administered under the Prescription Drug User Fee Act, which sets goals for the timeliness of 
the  FDA’s  review.  A  standard  review  period  is  twelve  months  from  submission  of  the  application,  while  priority  review  is  eight 
months from submission of the application. The testing and approval process is likely to require substantial time, effort and resources, 
and  there  can  be  no  assurance  that  any  approval  will  be  granted  on  a  timely  basis,  if  at  all.  The  FDA  may  deny  review  of  an 
application  by  refusing  to  file  the  application  or  not  approve  an  application  by  issuance  of  a  complete  response  letter  if  applicable 
regulatory criteria are not satisfied, require additional testing or information, or require risk management programs and post-market 
testing  and  surveillance  to  monitor  the  safety  or  efficacy  of  the  product.  Approval  may  occur  with  significant  Risk  Evaluation and 
Mitigation Strategies, or REMS,  which limit the clinical  use in the prescribing information, distribution or promotion of a product. 
Once issued, the FDA may withdraw product approval if ongoing regulatory requirements are not met or if safety problems occur after 
the product reaches the market. 

Orphan drugs are those intended for use in rare diseases or conditions.  As a result of the high cost of development and the low 
return  on  investment  for  rare  diseases,  certain  governments  provide  regulatory  and  commercial  incentives  for  the  development  of 
drugs for small disease populations.  In the United States, the term ‘‘rare disease or condition’’ means any disease or condition that 
affects  fewer  than  200,000  people  in  the  United  States.  Applications  for  U.S.  orphan  drug  status  are  evaluated  and  granted  by the 
Office of Orphan Products Development (“OOPD”) of the FDA and must be requested before submitting a BLA.  In the United States, 
orphan drugs are subject to the standard regulatory process for marketing approval but are exempt from the payment of user fees for 
licensure, may receive market exclusivity for a period of seven years and some tax benefits, and are eligible for OOPD grants.  If a 
product  with  orphan  designation  subsequently  receives  the  first  FDA  approval  for  the  disease  or  condition  for  which  it  has  such 
designation, the product is entitled to orphan product exclusivity, which means the FDA may not approve any other applications to 
market  the  same  drug  or  biological  product  for  the  same  indication,  except  in  very  limited  circumstances,  for  seven  years. 
Competitors, however, may receive approval of different products for the indication for which the orphan product has exclusivity or 
obtain  approval  for  the  same  product  but  for  a  different  indication  for  which  the  orphan  product  has  exclusivity.  Orphan  product 
exclusivity also could block the approval of one of our products for seven years if a competitor obtains approval of the same drug or 
biological product as defined by the FDA or if our product candidate is determined to be contained within the competitor’s product for 
the  same  indication  or  disease.  If  a  drug  or  biological  product  designated  as  an  orphan  product  receives  marketing  approval  for  an 
indication broader than what is designated, it may not be entitled to orphan product exclusivity. 

11 

Products  manufactured  or  distributed  pursuant  to  FDA  approvals  are  subject  to  continuing  regulation  by  the  FDA,  including 
manufacture, labeling, advertising, distribution, promotion, recordkeeping, annual product quality review and reporting requirements. 
Adverse  event  experience  with  the  product  must  be  reported  to  the  FDA  in  a  timely  fashion  and  pharmacovigilance  programs  to 
proactively look for these adverse events are mandated by the FDA. Manufacturers and their subcontractors 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 ongoing regulatory requirements, including cGMPs, which impose certain procedural and 
documentation requirements upon us and our third-party manufacturers. Following such inspections, the FDA may issue notices on 
Form 483 and Warning Letters that could cause us to modify certain activities. A Form 483 notice, if issued at the conclusion of an 
FDA inspection, can list conditions the FDA investigators believe  may  have violated cGMP or other FDA regulations or guidance. 
Failure to adequately and promptly correct the observations(s) can result in further regulatory enforcement action. In addition to Form 
483  notices  and  Warning  Letters,  failure  to  comply  with  the  statutory  and  regulatory  requirements  can  subject  a  manufacturer  to 
possible  legal  or  regulatory  action,  such  as  suspension  of  manufacturing,  seizure  of  product,  injunctive  action  or  possible  civil 
penalties. We cannot be certain that we or our present or future third-party manufacturers or suppliers will be able to comply with the 
cGMP  regulations  and  other  ongoing  FDA  regulatory  requirements.  If  we  or  our  present  or  future  third-party  manufacturers  or 
suppliers are not able to comply with these requirements, the FDA may halt our clinical trials, not approve our products, and require 
us to recall a product from distribution or withdraw approval of the BLA for that product. Failure to comply with ongoing regulatory 
obligations  can  result  in  delay  of  approval  or  Warning  Letters,  product  seizures,  criminal  penalties,  and  withdrawal  of  approved 
products, among other enforcement remedies. 

The  FDA  strictly  regulates  marketing,  labeling,  advertising  and  promotion  of  products  that  are  placed  on  the  market.  These 
regulations  include  standards  and  restrictions  for  direct-to-consumer  advertising,  industry-sponsored  scientific  and  educational 
activities,  promotional  activities  involving  the  internet,  and  off-label  promotion.  While  physicians  may  prescribe  for  off-label  uses, 
manufacturers may only promote for the approved indications and in accordance with the provisions of the approved label. The FDA 
has very broad enforcement authority under the Federal Food, Drug, and Cosmetic Act, and failure to abide by these regulations can 
result in penalties, including the issuance of a warning letter directing entities to correct deviations from FDA standards, and state and 
federal civil and criminal investigations and prosecutions. 

Federal  and  state  healthcare  laws,  including  fraud  and  abuse  and  health  information  privacy  and  security  laws,  are  also 
applicable  to  our  business.  We  could  face  substantial  penalties  and  our  business,  results  of  operations,  financial  condition  and 
prospects  could  be  adversely  affected.  The  laws  that  may  affect  our  ability  to  operate  include:  the  federal  Anti-Kickback  Statute, 
which prohibits soliciting, receiving, offering or paying remuneration, directly or indirectly, to induce, or in return for, the purchase or 
recommendation of an item or service reimbursable under a federal healthcare program, such as the Medicare and Medicaid programs; 
federal civil and criminal false claims laws and civil monetary penalty laws, which prohibit, among other things, individuals or entities 
from knowingly presenting, or causing to be presented, claims for payment from Medicare, Medicaid, or other third-party payers that 
are false or fraudulent; and the federal Health Insurance Portability and Accountability Act of 1996 (“HIPAA”), which created new 
federal  criminal  statutes  that  prohibit  executing  a  scheme  to  defraud  any  healthcare  benefit  program  and  making  false  statements 
relating to healthcare matters and was amended by the Health Information Technology and Clinical Health Act (“HITECH”), and its 
implementing  regulations,  which  imposes  certain  requirements  relating  to  the  privacy,  security  and  transmission  of  individually 
identifiable health information.  State law equivalents of each of the above federal laws exist, many of which differ from each other in 
significant ways and may not have the same effect, thus complicating compliance efforts. 

International Regulation 

In addition to regulations in the United States,  we are subject to a  variety of  foreign regulations  governing clinical trials and 
commercial  sales  and  distribution  of  any  future  products.  Whether  or  not  we  obtain  FDA  approval  for  a  product,  we  must  obtain 
approval by the comparable regulatory authorities of foreign countries before we can commence clinical trials or market the product in 
those  countries.  The  approval  process  varies  from  country  to  country,  and  the  time  may  be  longer  or  shorter  than  that  required  for 
FDA approval. The requirements governing the conduct of clinical trials, product licensing, pricing and reimbursement vary greatly 
from country to country. 

Patents and Trade Secrets 

Patent  and  trade  secret  protection  are  important  to  our  business  and  our  future  will  depend  in  part  on  our  ability  to  obtain 
patents, maintain trade secret protection and operate without infringing on the proprietary rights of others.  As a result of our ongoing 
activities, we hold and have filed applications for a number of patents in the United States and internationally to protect our products 
and important processes.  We also have obtained or have the right to obtain exclusive licenses to certain patents and applications filed 
by others.  However, the patent position of biotechnology companies generally is highly uncertain and consistent policy regarding the 
breadth of allowed claims has not emerged from the actions of the U.S. Patent and Trademark Office (“Patent Office”) with respect to 
biotechnology patents.  Accordingly, no assurance can be given that our patents will afford protection against competitors with similar 
technologies or others will not obtain patents claiming aspects similar to those covered by our patent applications. 

12 

On  January  6,  2015  we  were  awarded  U.S.  Patent  No.  8,926,976  covering  insulin  receptor-activating  antibodies  having  the 
functional properties of the lead antibody in our XMetA program, subsequently licensed to Novo Nordisk. On December 17, 2015 the 
European Patent Office issued a decision to grant European Patent 2 480 254 covering insulin receptor-activating antibodies having 
the functional properties of XOMA 358, the lead antibody in XOMA’s XMetD program. Additional patent applications covering our 
insulin receptor antibody programs are pending in the U.S. and certain other countries. 

We  have  exclusive  worldwide  rights  to  a  family  of  patents  relating  to  our  prolactin  receptor  antibody  program,  XOMA  213, 

following return of the program by Novartis. Issued patents in the family include US Patent No. 7,867,493 and EP 2 059 535. 

We  have  established  a  portfolio  of  patents  in  the  United  States,  Europe  and  certain  other  countries  for  our  gevokizumab 
program.  U.S. Patent Nos. 7,531,166 (which expires in 2027) and 7,582,742 cover gevokizumab and other antibodies and antibody 
fragments with similar binding properties for IL-1 beta, as well as nucleic acids, expression vectors and production cell lines for the 
manufacture  of  such  antibodies  and  antibody  fragments.  US  Patent  No.  9,206,252  relates  to  pharmaceutical  compositions  of 
gevokizumab and other antibodies and antibody fragments with similar binding properties for IL-1 beta.  U.S. Patent Nos. 7,744,865, 
7,744,866  and  7,943,121  relate  to  additional  IL-1  beta  binding  antibodies  and  binding  fragments.    U.S.  Patent  Nos.  7,695,718, 
8,101,166, 8,586,036, 8,545,846, 8,377,429 and 9,163,082 relate to methods of treating Type 2 diabetes or Type 2 diabetes-induced 
diseases  or  conditions  with  high  affinity  antibodies  and  antibody  fragments  that  bind  to  IL-1  beta,  including  gevokizumab.    U.S. 
Patent No. 8,637,029 relates to methods of treating gout with certain doses of IL-1 beta binding antibodies or binding fragments. U.S. 
Patent  No.  7,695,717  relates  to  methods  of  treating  certain  IL-1  related  inflammatory  diseases,  including  rheumatoid  arthritis  and 
osteoarthritis,  with  gevokizumab  and  other  antibodies  and  antibody  fragments  with  similar  binding  properties  for  IL-1  beta.    U.S. 
Patent No. 7,829,093 relates to methods of treating diabetes mellitus (“Type 1”) with gevokizumab or other IL-1 beta antibodies and 
fragments  having  similar  binding  properties.    U.S.  Patent  No.  7,829,094  relates  to  methods  of  treating  certain  cancers  with 
gevokizumab  or  other  IL-1  beta  antibodies  and  fragments  having  similar  binding  properties,  with  the  cancer  being  selected  from 
multiple myeloma, acute myelogenous leukemia and chronic myelogenous leukemia. U.S. Patent No. 7,988,968 relates to methods of 
treating certain IL-1 beta related coronary conditions, including myocardial infarction, with gevokizumab or other IL-1 beta antibodies 
and fragments having similar binding properties.  U.S. Patent No. 8,377,442 relates to methods of treating certain IL-1 beta related 
conditions,  including  inflammatory  eye  disease  or  uveitis,  with  gevokizumab  or  other  IL-1  beta  antibodies  and  fragments  having 
similar binding properties. U.S. Patent Nos. 8,551,487 and 9,139,646 relate to methods  of treating refractory  uveitis  with IL-1 beta 
binding antibodies and binding fragments. Also, patents have been granted by the European Patent Office and certain other countries 
for gevokizumab, as well as nucleic acids, expression vectors and production cell lines for the manufacture of gevokizumab. 

In October 2015, we announced that we had exclusively licensed the global development and commercialization rights to our 
TGF(cid:533)  antibody  program  to  Novartis.  The  licensed  intellectual  property  includes  US  Patent  Nos.  8,569,464  and 9,145,458  covering 
XOMA’s lead TGF(cid:533) antibodies and methods of use thereof. 

We established a portfolio of patents related to our bacterial expression technology, including claims to methods for expression 
and secretion of recombinant proteins from bacteria, including immunoglobulin gene products, and improved methods and cells for 
expression of recombinant protein products. We have granted more than 60 licenses to biotechnology and pharmaceutical companies 
to use the Company’s patented and proprietary technologies relating to bacterial expression of recombinant pharmaceutical products. 
The last-to-expire patent licensed under the majority of these license agreements is Canadian patent 1,341,235, which is expected to 
expire in May 2018. 

In  addition,  we  have  developed  a  portfolio  of  patents  and  applications  related  to  improvements  to  our  bacterial  expression 
technology,  and  to  our  display  libraries.  U.S.  Patent  Nos.  7,094,579,  7,396,661,  7,972,811,  7,977,068  and  8,476,040  relate  to 
particular  eukaryotic  signal  sequences  and  their  use  in  methods  for  prokaryotic  expression  of  polypeptides  and  for  preparing 
polypeptide display libraries.  WO 2012/106615 relates to the use of cytoplasmic fkpA and skp chaperones to enhance recombinant 
protein expression in bacteria. U.S. Patent Nos. 8,546,307 and 8,546,308 relate to novel triple tag sequences, phage display antibody 
libraries  with  such  sequences,  and  methods  of  screening  the  libraries.  WO  2011/038301  relates  to  novel  methods  of  screening  for 
kinetic  modulating  antibodies  and  WO  2012/092323  relates  to  display  of  antibodies  or  antibody  fragments  using  a  PDZ  domain 
display system. 

We  also  have  established  a  portfolio  of  patents  related  to  our  mammalian  expression  technology,  including  U.S.  Patent  Nos. 
7,192,737, 7,993,915, 7,794,976 and 8,497,096, which relate to methods of producing recombinant proteins using particular vectors, 
including  expression  vectors  comprising  multiple  copies  of  a  transcription  unit  encoding  a  polypeptide  separated  by  at  least  one 
selective marker gene. 

We  have  been  granted  patents  related  to  our Targeted  Affinity  Enhancement  (TAE)™  technology,  including  U.S.  Patent  No. 

9,102,711 and EP 2 242 843 directed to methods of mutating nucleic acids using certain primer sets. 

13 

In  November  2013,  we  were  awarded  U.S.  Patent  No.  8,584,349,  entitled  "Flexible  Manufacturing  System."  This  patent  is 
directed to a flexible system of movable manufacturing bays, adapted to easily and quickly connect to a central supply of utilities such 
as  air,  water,  and  electricity.  This  unique  arrangement  facilitates  flexible  design  and  eliminates  change-over  downtime,  which 
translates into significantly reduced capital expenditures, production costs, and maintenance costs. The flexible manufacturing system 
can be applied to fields as diverse as pharmaceuticals, biologics, and electronics. In October 2014 we announced that the Texas A&M 
University System agreed to a non-exclusive license to this technology. 

If certain patents issued to others are upheld or if certain patent applications filed by others issue and are upheld, we may require 
certain licenses from others in order to develop and commercialize certain potential products incorporating our technology.  There can 
be no assurance that such licenses, if required, will be available on acceptable terms. 

Where appropriate, we also rely on trade secrets to protect aspects of our technology.  However, trade secrets are difficult to 
protect.  We protect our proprietary technology and processes, in part, by confidentiality agreements with our employees, consultants 
and collaborators.  These parties may breach these agreements, and we may not have adequate remedies for any breach.  Our trade 
secrets  may  otherwise  become  known  or  be  independently  discovered  by  competitors.    To  the  extent  that  we  or  our  consultants  or 
collaborators  use  intellectual  property  owned  by  others,  we  may  have  disputes  with  our  collaborators  or  consultants  or  other  third 
parties as to the rights in related or resulting know-how and inventions. 

Financial Information about Geographic Areas 

We  believe,  because  the  pharmaceutical  industry  is  global  in  nature,  international  activities  will  be  a  significant  part  of  our 
future business activities, and when and if we are able to generate income, a portion of that income may be derived from product sales 
and other activities outside the United States.  One of our strategic goals is to establish XOMA as a commercial organization in the 
United States. 

We have determined that we operate in one business segment as we only report operating results on an aggregate basis to the 

chief operating decision maker of the XOMA Corporation. Our property and equipment is held primarily in the United States. 

Financial information regarding the geographic areas in which we operate and segment information is included in Note 14 to the 

December 31, 2015, Financial Statements: Concentration of Risk, Segment and Geographic Information. 

Concentration of Risk 

In 2015, Novartis International accounted for 67 percent of our total revenue. NIAID and Servier accounted for 51 percent and 
28  percent,  respectively,  of  our  total  revenue  in  2014.  Servier,  NIAID  and  Novartis  accounted  for  43  percent,  26  percent,  and  20 
percent respectively, of our total revenue in 2013. At December 31, 2015, Five Prime, NIAID, Servier and Centocor accounted for 39 
percent, 25 percent, 18 percent and 10 percent, respectively, of the accounts receivable balance. NIAID, Servier and Oncobiologics 
accounted  for  44  percent,  34  percent  and  12  percent,  respectively,  of  our  total  accounts  receivable  balance  at  December  31,  2014. 
None of these parties represent a related party to XOMA and the loss of one or more of these customers could have a material effect 
on our business and financial condition. 

Employees 

As of March 7, 2016, we employed 86 full-time employees at our facilities, principally in Berkeley, California, none of whom 
are  unionized.  Our  employees  primarily  are  engaged  in  clinical,  process  development,  research  and  product  development,  and  in 
executive, business development, finance and administrative positions.   

Available Information 

For information on XOMA’s investment prospects and risks, please contact Investor Relations and Corporate Communications 
at  (510)  204-7200  or  by  sending  an  e-mail  message  to  investorrelations@xoma.com.  Our  principal  executive  offices  are  located  at 
2910 Seventh Street, Berkeley, California 94710, U.S.A. Our telephone number is (510) 204-7200. 

14 

The following information can be found on our website at http://www.xoma.com or can be obtained free of charge by contacting 

our Investor Relations Department: 

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Our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and any amendments to 
those  reports  filed  or  furnished  pursuant  to  Section  13(a)  or  15(d)  of  the  Exchange  Act  will  be  available  as  soon  as 
reasonably practicable after such material is electronically filed or otherwise furnished to the SEC. All reports we file with 
the SEC also can be obtained free of charge via EDGAR through the SEC’s website at http://www.sec.gov. 

Our  policies  related  to  corporate  governance,  including  our  Code  of  Ethics  applying  to  our  directors,  officers  and 
employees (including our principal executive officer and principal financial and accounting officer) that we have adopted 
to  meet  the  requirements  set  forth  in  the  rules  and  regulations  of  the  SEC  and  its  corporate  governance  principles,  are 
available. 

The  charters  of  the  Audit,  Compensation  and  Nominating  &  Governance  Committees  of  our  Board  of  Directors  are 
available. 

We intend to satisfy the applicable disclosure requirements regarding amendments to, or waivers from, provisions of our Code 

of Ethics by posting such information on our website. 

Item 1A.  Risk Factors  

The following risk  factors and other information included in this annual report should be carefully considered. The risks and 
uncertainties described below are not the only ones  we face. Additional risks and uncertainties not presently known to us also  may 
impair our business operations. If any of the following risks occur, our business, financial condition, operating results and cash flows 
could be materially adversely affected.  

Risks Related to our Financial Results and Capital Requirements 

We have sustained losses in the past, and we expect to sustain losses in the foreseeable future. 

We  have  been  and  are  developing  numerous  product  candidates,  and  as  a  result  have  experienced  significant  losses.  As  of 

December 31, 2015, we had an accumulated deficit of $1.1 billion. 

For the year ended December 31, 2015, we had a net loss of approximately $20.6 million and for the year ended December 31, 

2014, we had a net loss of approximately $38.3 million.  

Our ability to achieve profitability is dependent in large part on the success of our development programs, obtaining regulatory 
approval  for  our  product  candidates  and  licensing  certain  of  our  preclinical  compounds,  all  of  which  are  uncertain.  Our  product 
candidates are still being developed, and we do not know whether we will ever achieve sustained profitability or whether cash flow 
from future operations will be sufficient to meet our needs. 

We have devoted most of our financial resources to research and development, including our non-clinical development activities 
and  clinical  trials.  Our  product  candidates  are  still  being  developed,  and  we  do  not  know  whether  we  will  ever  achieve  sustained 
profitability  or  whether  cash  flow  from  future  operations  will  be  sufficient  to  meet  our  needs.  To  date,  we  have  financed  our 
operations  primarily  through  the  sale  of  equity  securities  and  debt,  and  collaboration  and  licensing  arrangements.  The  size  of  our 
future net losses will depend, in part, on the rate of future expenditures and our ability to generate revenues. We expect to continue to 
incur  substantial  expenses  as  we  continue  our  research  and  development  activities  for  our  product  candidates.  If  our  product 
candidates are not successfully developed or commercialized, or if revenues are insufficient following marketing approval, we will not 
achieve  profitability  and  our  business  may  fail.  Our  ability  to  achieve  profitability  is  dependent  in  large  part  on  the  success  of  our 
development programs, obtaining regulatory approval for our product candidates and licensing certain of our preclinical compounds, 
all of which are uncertain. Our success is also dependent on obtaining regulatory approval to market our product candidates through 
current and future collaborations, which may not materialize or prove to be successful. 

15 

 
 
Because our product candidates are still being developed, we will require substantial funds to continue; we cannot be certain that 
funds  will  be  available,  and  if  they  are  not  available,  we  may  be  forced  to  delay,  reduce,  or  eliminate  our  product  development 
programs or to take actions that could adversely affect an investment in our common stock and we may not be able to continue 
operations. 

We will need to commit substantial funds to continue development of our product candidates, and we may not be able to obtain 
sufficient funds on acceptable terms, or at all. Any additional debt financing or additional equity that we raise may contain terms that 
are not favorable to our stockholders or us. If we raise additional funds through collaboration and licensing arrangements with third 
parties, we may be required to relinquish some rights to our technologies or our product candidates, grant licenses on terms that are 
not favorable to us or enter into a collaboration arrangement for a product candidate at an earlier stage of development or for a lesser 
amount than we might otherwise choose. 

Additional funds may not be available when we need them on terms that are acceptable to us, or at all. If adequate funds are not 

available on a timely basis, we may: 

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terminate  or  delay  clinical  trials  for  one  or  more  of  our  product  candidates;  reduce  or  eliminate  certain  product 
development efforts or commercialization efforts; 

further reduce our headcount and capital or operating expenditures; or 

curtail our spending on protecting our intellectual property. 

We  finance  our  operations  primarily  through  our  multiple  revenue  streams  resulting  from  discovery  and  development 

collaborations, the licensing of our antibody technologies, debt and through sales of our common stock. 

Based  on  our  cash,  cash  equivalents  and  marketable  securities  of  $66.3  million  at  December  31,  2015,  anticipated  spending 
levels, anticipated cash inflows from collaborations, licensing transactions, funding availability included under our loan agreements, 
and  other  sources  of  funding  that  we  believe  to  be  available,  we  anticipate  that  we  will  have  adequate  capital  to  fund  operations 
through  at  least  December  31,  2016.  Any  significant  revenue  shortfalls,  increases  in  planned  spending  on  development  programs, 
more rapid progress of development programs than anticipated, or the initiation of new clinical trials, as well as the unavailability of 
anticipated  sources  of  funding,  could  shorten  this  period  or  otherwise  have  a  material  adverse  impact  on  our  ability  to  finance  our 
continued  operations.  Progress  or  setbacks  by  potentially  competing  products  also  may  affect  our  ability  to  raise  new  funding  on 
acceptable terms. 

We do not know when or whether: 

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operations will generate meaningful funds; 

additional agreements for product development funding can be reached; 

strategic alliances can be negotiated; or 

adequate additional financing will be available for us to finance our own development on acceptable terms, or at all. 

If adequate funds are not available, we will be required to delay, reduce the scope of, or eliminate one or more of our product 

development programs and further reduce personnel-related costs. 

We may not realize the expected benefits of our cost-saving initiatives. 

Reducing  costs  is  a  key  element  of  our  current  business  strategy.  On  August  21,  2015, we,  in  connection  with  our  efforts  to 
lower operating expenses and preserve capital while continuing to focus on our product pipeline, implemented a workforce reduction, 
which led to the termination of 38 employees and the elimination of 20 open positions.  We terminated an additional five employees 
on September 29, 2015 and an additional nine employees on October 20, 2015.  

We  recorded  an  aggregate  restructuring  charge  of  approximately $2.9  million  related  to  severance,  other  termination  benefits 
and outplacement services in connection with the workforce reduction.  In addition, we recognized an additional restructuring charge 
of  $0.8  million  in  total  contract  termination  costs  in  the  second  half  of  2015,  which  primarily  include  costs  in  connection  with  the 
discontinuation of the EYEGUARD studies. 

If we experience excessive unanticipated inefficiencies or incremental costs in connection with restructuring activities, such as 
unanticipated inefficiencies caused by reducing headcount, we may be unable to meaningfully realize cost savings and we may incur 
expenses in excess of what we anticipate. Either of these outcomes could prevent us from meeting our strategic objectives and could 
adversely impact our results of operations and financial condition.  

16 

We are subject to foreign currency exchange rate risks. 

We are subject to foreign currency exchange rate risks because substantially all of our revenues and operating expenses are paid 
in U.S. Dollars, but we incur certain expenses, as well as interest and principal obligations with respect to our loan from Servier in 
Euros. To the extent the U.S. Dollar declines in value against the Euro, the effective cost of servicing our Euro-denominated debt will 
be  higher.  Changes  in  the  exchange  rate  result  in  foreign  currency  gains  or  losses.  There  can  be  no  assurance  foreign  currency 
fluctuations will not have a material adverse effect on our business, financial condition, liquidity or results of operations.  

Our ability to use our net operating loss carry-forwards and other tax attributes will be substantially limited by Section 382 of the 
U.S. Internal Revenue Code. 

Section 382 of the U.S. Internal Revenue Code of 1986, as amended, generally limits the ability of a corporation that undergoes 
an “ownership change” to utilize its net operating loss carry-forwards (“NOLs”) and certain other tax attributes against any taxable 
income in taxable periods after the ownership change. The amount of taxable income in each taxable year after the ownership change 
that  may  be  offset  by  pre-change  NOLs  and  certain  other  pre-change  tax  attributes  is  generally  equal  to  the  product  of  (a)  the  fair 
market value of the corporation’s outstanding shares (or, in the case of a foreign corporation, the fair market value of items treated as 
connected with the conduct of a trade or business in the United States) immediately prior to the ownership change and (b) the long-
term tax exempt rate (i.e., a rate of interest established by the U.S. Internal Revenue Service (“IRS”) that fluctuates from month to 
month).  In  general,  an  “ownership  change”  occurs  whenever  the  percentage  of  the  shares  of  a  corporation  owned,  directly  or 
indirectly, by “5-percent shareholders” (within the meaning of Section 382 of the Internal Revenue Code) increases by more than 50 
percentage  points  over  the  lowest  percentage  of  the  shares  of  such  corporation  owned,  directly  or  indirectly,  by  such  “5-percent 
shareholders” at any time over the preceding three years. 

Based  on  an  analysis  under  Section  382  of  the  Internal  Revenue  Code  (which  subjects  the  amount  of  pre-change  NOLs  and 
certain other pre-change tax attributes that can be utilized to an annual limitation),  we experienced ownership changes in 2009 and 
2012,  which  substantially  limit  the  future  use  of  our  pre-change  NOLs  and  certain  other  pre-change  tax  attributes  per  year.  As  of 
December  31,  2015,  we  have  excluded  the  NOLs  and  research  and  development  credits  that  will  expire  as  a  result  of  the  annual 
limitations.  To  the  extent  that  we  do  not  utilize  our  carry-forwards  within  the  applicable  statutory  carry-forward  periods,  either 
because of Section 382 limitations or the lack of sufficient taxable income, the carry-forwards will also expire unused. As a result of 
changes in our stockholder base during the third quarter of 2015, based on an initial analysis of available data, we concluded that an 
ownership change under Section 382 has not occurred beyond the ownership changes in 2009 and 2012.  Accordingly, our utilization 
of the 2012 post-change net operating loss and credit carry-forwards should not be limited.   

Risks Related to the Development and Commercialization of our Current and Future Product Candidates  

If our therapeutic product candidates do not receive regulatory approval, we will be unable to market them. 

Our  product  candidates  (including  XOMA  358)  cannot  be  manufactured  and  marketed  in  the  United  States  or  any  other 
countries without required regulatory approvals. The U.S. government and governments of other countries extensively regulate many 
aspects of our product candidates, including: 

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clinical development and testing; 

manufacturing; 

labeling; 

storage; 

record keeping; 

promotion and marketing; and 

importing and exporting. 

17 

In  the  United  States,  the  Food  and  Drug  Administration  (“FDA”)  regulates  pharmaceutical  products  under  the  Federal  Food, 
Drug, and Cosmetic Act and other laws, including, in the case of biologics, the Public Health Service Act. At the present time, we 
believe many of our product candidates (including XOMA 358) will be regulated by the FDA as biologics. Initiation of clinical trials 
requires approval by health authorities. Clinical trials involve the administration of the investigational new drug to healthy volunteers 
or to patients under the supervision of a qualified principal investigator. Clinical trials must be conducted in accordance with FDA and 
International Conference on Harmonization Good Clinical Practices and the European Clinical Trials Directive, as applicable, under 
protocols that detail the objectives of the study, the parameters to be used to monitor safety and the efficacy criteria to be evaluated. 
Other  national,  foreign  and  local  regulations  also  may  apply.  The  developer  of  the  drug  must  provide  information  relating  to  the 
characterization  and  controls  of  the  product  before  administration  to  the  patients  participating  in  the  clinical  trials.  This  requires 
developing approved assays of the product to test before administration to the patient and during the conduct of the trial. In addition, 
developers of pharmaceutical products must provide periodic data regarding clinical trials to the FDA and other health authorities, and 
these health authorities may issue a clinical hold upon a trial if they do not believe, or cannot confirm, that the trial can be conducted 
without unreasonable risk to the trial participants. Based on our interactions  with the FDA, XOMA 358 clinical testing is currently 
limited to single-dose studies in adults.  Data has been generated which will be submitted to request expanded testing as part of our 
clinical development plan.  We cannot assure you that U.S. and foreign health authorities will not issue a clinical hold with respect to 
any of our clinical trials in the future. 

The results of the preclinical studies and clinical testing, together with chemistry, manufacturing and controls information, are 
submitted to the FDA and other health authorities in the form of a New Drug Application (“NDA”) for a drug, and in the form of a 
Biologic License Application (“BLA”) for a biological product, requesting approval to commence commercial sales. In responding to 
an  NDA  or  BLA,  the  FDA  or  foreign  health  authorities  may  grant  marketing  approvals,  request  additional  information  or  further 
research, or deny the application if it determines the application does not satisfy its regulatory approval criteria. Regulatory approval 
of an NDA, BLA, or supplement is never guaranteed. The approval process can take several years, is extremely expensive and can 
vary  substantially  based  upon  the  type,  complexity,  and  novelty  of  the  products  involved,  as  well  as  the  target  indications.  FDA 
regulations and policies permit applicants to request accelerated approval or priority review pathways for products intended to treat 
certain serious or life-threatening illnesses in certain circumstances. If granted by the FDA, these pathways can provide a shortened 
timeline to commercialize the product, although the shortened timeline is often accompanied by additional post-market requirements. 
Although we may pursue the FDA’s accelerated approval or priority review programs, we cannot guarantee the FDA will permit us to 
utilize these pathways or the FDA’s review of our application will not be delayed. Moreover, even if the FDA agrees to an accelerated 
approval or priority review of any of our applications, we ultimately may not be able to obtain approval of our application in a timely 
fashion  or  at  all.  The  FDA  and  foreign  health  authorities  have  substantial  discretion  in  the  drug  and  biologics  approval  processes. 
Despite  the  time  and  expense  incurred,  failure  can  occur  at  any  stage,  and  we  could  encounter  problems  that  cause  us  to  abandon 
clinical trials or to repeat or perform additional preclinical, clinical or manufacturing-related studies. 

Changes in the regulatory approval policy during the development period, changes in, or the enactment of additional regulations 
or statutes, or changes in regulatory review for each submitted product application may cause delays in the approval or rejection of an 
application. State regulations may also affect our proposed products. 

The  FDA  and  other  regulatory  agencies  have  substantial  discretion  in  both  the  product  approval  process  and  manufacturing 
facility approval process, and as a result of this discretion and uncertainties about outcomes of testing, we cannot predict at what point, 
or whether, the FDA or other regulatory agencies will be satisfied with our or our collaborators’ submissions or whether the FDA or 
other regulatory agencies will raise questions that may be material and delay or preclude product approval or manufacturing facility 
approval. In light of this discretion and the complexities of the scientific, medical and regulatory environment, our interpretation or 
understanding of the FDA’s or other regulatory agencies’  requirements, guidelines or expectations  may prove incorrect,  which also 
could delay further or increase the cost of the approval process. As we accumulate additional clinical data,  we will submit it to the 
FDA and other regulatory agencies, as appropriate, and such data may have a material impact on the approval process. 

Given  that  regulatory  review  is  an  interactive  and  continuous  process,  we  maintain  a  policy  of  limiting  announcements  and 
comments upon the specific details of regulatory review of our product candidates, subject to our obligations under the securities laws, 
until definitive action is taken. 

18 

We have received negative results from certain of our clinical trials, and we face uncertain results of other clinical trials of our 
product candidates. 

Drug development has inherent risk, and we are required to demonstrate through adequate and well-controlled clinical trials that 
our product candidates are effective, with a favorable benefit-risk profile for use in their target profiles before we can seek regulatory 
approvals for their commercial use. It is possible we may never receive regulatory approval for any of our product candidates. Even if 
a product candidate receives regulatory approval, the resulting product may not gain market acceptance among physicians, patients, 
healthcare payors and the medical community. In March 2011, we announced our 421-patient Phase 2b trial of gevokizumab in Type 2 
diabetes  did  not  achieve  the  primary  endpoint  of  reduction  in  hemoglobin  A1c  (“HbA1c”)  after  six  monthly  treatments  with 
gevokizumab compared to placebo. In June 2011, we announced top-line trial results from our six-month 74-patient Phase 2a trial of 
gevokizumab in Type 2 diabetes, and there were no differences in glycemic control between the drug and placebo groups as measured 
by HbA1c levels. In March 2014, we reported that despite early positive results in our gevokizumab proof-of-concept study in patients 
with erosive osteoarthritis of the hand (“EOA”) and elevated C-reactive protein, the top-line data at Day 168 in that study, as well as 
data  at  Day  84  in  patients  with  EOA  and  non-elevated  CRP,  were  not  positive.  In  July  2015,  we  announced  that  Servier’s 
EYEGUARD-B  Phase  3  study  of  gevokizumab  in  patients  with  Behçet’s  disease  uveitis  did  not  meet  its  primary  endpoint.    In 
addition,  neither  EYEGUARD-A  nor  EYEGUARD-C  produced  positive  results.    In  March  2016,  we  decided  to  close  our  Phase  3 
studies of gevokizumab in pyoderma gangrenosum.  A preliminary review of the available data did not show a clear signal of activity 
in PG. 

Many  of  our  product  candidates,  including  XOMA  358,  require  significant  additional  research  and  development,  extensive 
preclinical  studies and clinical trials and regulatory approval prior to any commercial sales. This process is lengthy and expensive, 
often taking a number of years. As clinical results frequently are susceptible to varying interpretations that may delay, limit or prevent 
regulatory approvals, the length of time necessary to complete clinical trials and to submit an application for marketing approval for a 
final decision by a regulatory authority varies significantly. As a result, it is uncertain whether: 

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our future filings will be delayed; 

our preclinical and clinical studies will be successful; 

we will be successful in generating viable product candidates; 

we will be able to provide necessary data; 

results of future clinical trials will justify further development; or 

we ultimately will achieve regulatory approval for our product candidates. 

The timing of the commencement, continuation and completion of clinical trials may be subject to significant delays relating to 
various causes, including failure to complete preclinical testing and earlier-stage clinical trials in a timely manner, engaging contract 
research  organizations  and  other  service  providers,  scheduling  conflicts  with  participating  clinicians  and  clinical  institutions, 
difficulties  in  identifying  and  enrolling  patients  who  meet  trial  eligibility  criteria  and  shortages  of  available  drug  supply.  Patient 
enrollment is a  function of  many  factors, including the size of the patient population, the proximity of patients to clinical sites, the 
eligibility  criteria  for  the  trial,  the  existence  of  competing  clinical  trials  and  the  availability  of  alternative  or  new  treatments. 
Regardless  of  the  initial  size  or  relative  complexity  of  a  clinical  trial,  the  costs  of  such  trial  may  be  higher  than  expected  due  to 
increases in duration or size of the trial, changes in the protocol pursuant to which the trial is being conducted, additional or special 
requirements of one or more of the healthcare centers where the trial is being conducted, or changes in the regulatory requirements 
applicable  to  the  trial  or  in  the  standards  or  guidelines  for  approval  of  the  product  candidate  being  tested  or  for  other  unforeseen 
reasons. In addition, we conduct clinical trials in foreign countries, which may subject us to further delays and expenses as a result of 
increased drug shipment costs, additional regulatory requirements and the engagement of foreign clinical research organizations, and 
may expose us to risks associated with foreign currency transactions insofar as we might desire to use U.S. Dollars to make contract 
payments denominated in the foreign currency where the trial is being conducted. 

19 

All of our product candidates are prone to the risks of failure inherent in drug development. Preclinical studies may not yield 
results that satisfactorily support the filing of an Investigational New Drug application (“IND”) (or a foreign equivalent) with respect 
to our product candidates. Even if these applications would be or have been filed with respect to our product candidates, the results of 
preclinical studies do not necessarily predict the results of clinical trials. Similarly, early stage clinical trials in healthy volunteers do 
not predict the results of later-stage clinical trials, including the safety and efficacy profiles of any particular product candidates. For 
example, the Phase 3 EYEGUARD-B trial of gevokizumab failed to achieve success on its primary endpoint measures.  In addition, 
there can be no assurance the design of our clinical trials is focused on appropriate indications, patient populations, dosing regimens or 
other  variables  that  will  result  in  obtaining  the  desired  efficacy  data  to  support  regulatory  approval  to  commercialize  the  drug. 
Moreover, FDA officials or foreign regulatory agency officials may question the integrity of our data or otherwise subject our clinical 
trials  to  additional  scrutiny  when  the  clinical  trials  are  conducted  by  principal  investigators  who  serve,  or  previously  served,  as 
scientific advisors or consultants to us and receive cash compensation in connection with such services. Preclinical and clinical data 
can also be interpreted in different ways. Accordingly, FDA officials or officials from foreign regulatory authorities could interpret the 
data differently than we or our collaboration or development partners do, which could delay, limit or prevent regulatory approval. 

Administering any of our products or potential products may produce undesirable side effects, also known as adverse effects. 
Toxicities  and  adverse  effects  that  we  have  observed  in  preclinical  studies  for  some  compounds  in  a  particular  research  and 
development program may occur in preclinical studies or clinical trials of other compounds from the same program. Such toxicities or 
adverse effects could delay or prevent the filing of an IND (or a foreign equivalent) with respect to such products or potential products 
or cause us to cease clinical trials with respect to any drug candidate. In clinical trials, administering any of our products or product 
candidates to humans may produce adverse effects. These adverse effects could interrupt, delay or halt clinical trials of our products 
and  product  candidates  and  could  result  in  the  FDA  or  other  regulatory  authorities  denying  approval  of  our  products  or  product 
candidates for any or all targeted indications. The FDA, other regulatory authorities, our collaboration or development partners or we 
may  suspend  or  terminate  clinical  trials  at  any  time.  Even  if  one  or  more  of  our  product  candidates  were  approved  for  sale,  the 
occurrence  of  even  a  limited  number  of  toxicities  or  adverse  effects  when  used  in  large  populations  may  cause  the  FDA  or  other 
regulatory authorities to impose restrictions on, or stop, the further marketing of such drugs. Indications of potential adverse effects or 
toxicities that may occur in clinical trials and that we believe are not significant during the course of such clinical trials may actually 
turn out later to constitute serious adverse effects or toxicities when a drug has been used in large populations or for extended periods 
of time. Any failure or significant delay in completing preclinical studies or clinical trials for our product candidates, or in receiving 
and maintaining regulatory approval for the sale of any drugs resulting from our product candidates, may severely harm our reputation 
and business.  

Products and technologies of other companies may render some or all of our products and product candidates noncompetitive or 
obsolete. 

Developments by others may render our products, product candidates, or technologies obsolete or uncompetitive. Technologies 
developed and utilized by the biotechnology and pharmaceutical industries are changing continuously and substantially. Competition 
in antibody-based technologies is intense and is expected to increase in the future as a number of established biotechnology firms and 
large chemical and pharmaceutical companies advance in these fields. Many of these competitors may be able to develop products and 
processes competitive with or superior to our own for many reasons, including that they may have: 

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significantly greater financial resources; 

larger research and development and marketing staffs; 

larger production facilities; 

entered into arrangements with, or acquired, biotechnology companies to enhance their capabilities; or 

extensive experience in preclinical testing and human clinical trials. 

These  factors  may  enable  others  to  develop  products  and  processes  competitive  with  or  superior  to  our  own  or  those  of  our 
collaborators. In addition, a significant amount of research in biotechnology is being carried out in universities and other non-profit 
research organizations. These entities are becoming increasingly  interested in  the commercial value of their  work and  may become 
more aggressive in seeking patent protection and licensing arrangements. Furthermore, many companies and universities tend not to 
announce or disclose important discoveries or development programs until their patent position is secure or, for other reasons, later; as 
a  result,  we  may  not  be  able  to  track  development  of  competitive  products,  particularly  at  the  early  stages.  Positive  or  negative 
developments  in  connection  with  a  potentially  competing  product  may  have  an  adverse  impact  on  our  ability  to  raise  additional 
funding  on  acceptable  terms.  For  example,  if  another  product  is  perceived  to  have  a  competitive  advantage,  or  another  product’s 
failure  is  perceived  to  increase  the  likelihood  that  our  product  will  fail,  then  investors  may  choose  not  to  invest  in  us  on  terms  we 
would accept or at all. 

20 

The  examples  below  pertain  to  competitive  events  in  the  market,  but  are  not  intended  to  be  representative  of  all  existing 

competitive events. 

We are developing XOMA 358, a fully human negative allosteric modulating insulin receptor antibody, as a novel treatment for 
non-drug-induced,  endogenous  hyperinsulinemic  hypoglycemia  (low  blood  glucose  caused  by  excessive  insulin  produced  by  the 
body). Certain other companies are developing products based on improved versions of glucagon, a hormone naturally secreted by the 
pancreas that counteracts the effects of insulin by raising blood glucose levels.  

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Biodel Inc. is developing a formulation of glucagon designed to remain stable in solution for a longer period than existing 
commercial  formulations.  FDA  has  granted  orphan  drug  designation  for  Biodel's  glucagon  for  the  prevention  of 
hypoglycemia in the CHI population 

S-cubed  Limited  is  developing  a  synthetic  form  of  glucagon.  It  is  expected  to  be  given  under  the  skin  using  a  special 
infusion pump. The European Medicines Agency (“EMA”) has granted orphan drug designation for S-cubed glucagon for 
the treatment of CHI patients. 

Xeris Pharmaceuticals is developing a soluble  glucagon. The FDA and EMA  have  granted orphan drug designation  for 
Xeris' soluble glucagon for the prevention of severe, persistent hypoglycemia in patients with CHI. 

We  may  be  unable  to  price  our  products  effectively  or  obtain  adequate  reimbursement  for  sales  of  our  products,  which  would 
prevent our products from becoming profitable. 

If  we or our third-party collaborators or licensees succeed in bringing our product candidates to the  market, they  may not be 
considered  cost  effective,  and  reimbursement  to  the  patient  may  not  be  available  or  may  not  be  sufficient  to  allow  us  to  sell  our 
products on a competitive basis. In both the United States and elsewhere, sales of medical products and treatments are dependent, in 
part,  on  the  availability  of  reimbursement  to  the  patient  from  third-party  payors,  such  as  government  and  private  insurance  plans. 
Third-party payors are increasingly challenging the prices charged for pharmaceutical products and services. Our business is affected 
by the efforts of government and third-party payors to contain or reduce the cost of healthcare through various means. In the United 
States, there have been and will continue to be a number of federal and state proposals to implement government controls on pricing. 

In addition, the emphasis on managed care in the United States has increased and will continue to increase the pressure on the 
pricing of pharmaceutical products. We cannot predict whether any legislative or regulatory proposals  will be adopted or the effect 
these proposals or managed care efforts may have on our business. 

We do not know whether there will be, or will continue to be, a viable market for the products in which we have an ownership or 
royalty interest. 

Even if products in which we have an interest receive approval in the future, they may not be accepted in the marketplace. In 
addition,  we or our collaborators or licensees  may experience difficulties in launching new products,  many of  which are novel and 
based on technologies that are unfamiliar to the healthcare community. We have no assurance healthcare providers and patients will 
accept  such  products,  if  developed.  For  example,  physicians  and/or  patients  may  not  accept  a  product  for  a  particular  indication 
because it has been biologically derived (and not discovered and developed by more traditional means) or if no biologically derived 
products  are  currently  in  widespread  use  in  that  indication.  Similarly,  physicians  may  not  accept  a  product  if  they  believe  other 
products to be more effective or more cost effective or are more comfortable prescribing other products. 

Furthermore, government agencies, as well as private organizations involved in healthcare, from time to time publish guidelines 
or  recommendations  to  healthcare  providers  and  patients.  Such  guidelines  or  recommendations  can  be  very  influential  and  may 
adversely  affect  product  usage  directly  (for  example,  by  recommending  a  decreased  dosage  of  a  product  in  conjunction  with  a 
concomitant  therapy  or  a  government  entity  withdrawing  its  recommendation  to  screen  blood  donations  for  certain  viruses)  or 
indirectly (for example, by recommending a competitive product over our product). Consequently, we do not know if physicians or 
patients will adopt or use our products for their approved indications. 

Even approved and marketed products are subject to risks relating to changes in the market for such products. Introduction or 
increased  availability  of  generic  versions  of  products  can  alter  the  market  acceptance  of  branded  products.  In  addition,  unforeseen 
safety issues may arise at any time, regardless of the length of time a product has been on the market. 

21 

We are exposed to an increased risk of product liability claims. 

The testing, marketing and sales of medical products entails an inherent risk of allegations of product liability. In the past, we 
were party to product liability claims filed against Genentech Inc. and, even though Genentech agreed to indemnify us in connection 
with  these  matters  and  these  matters  have  been  settled,  there  can  be  no  assurance  other  product  liability  lawsuits  will  not  result  in 
liability to us or that our insurance or contractual arrangements will provide us with adequate protection against such liabilities. In the 
event  of  one  or  more  large,  unforeseen  awards  of  damages  against  us,  our  product  liability  insurance  may  not  provide  adequate 
coverage. A significant product liability claim for which we were not covered by insurance or indemnified by a third party would have 
to be paid from cash or other assets, which could have an adverse effect on our business and the value of our common stock. To the 
extent  we  have  sufficient  insurance  coverage,  such  a  claim  would  result  in  higher  subsequent  insurance  rates.  In  addition,  product 
liability  claims  can  have  various  other  ramifications,  including  loss  of  future  sales  opportunities,  increased  costs  associated  with 
replacing products, a negative impact on our goodwill and reputation, and divert our management’s attention from our business, each 
of which could also adversely affect our business and operating results. 

If  we  and  our  partners  are  unable  to  protect  our  intellectual  property,  in  particular  our  patent  protection  for  our  principal 
products, product candidates and processes, and prevent its use of the covered subject matter by third parties, our ability to compete 
in the market will be harmed, and we may not realize our profit potential. 

We rely on patent protection, as well as a combination of copyright, trade secret, and trademark laws to protect our proprietary 
technology and prevent others from duplicating our products or product candidates. However, these means may afford only limited 
protection and may not: 

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prevent our competitors from duplicating our products; 

prevent our competitors from gaining access to our proprietary information and technology; or 

permit us to gain or maintain a competitive advantage. 

Because  of  the  length  of  time  and  the  expense  associated  with  bringing  new  products  to  the  marketplace,  we  and  our 
collaboration and development partners hold and are in the process of applying for a number of patents in the United States and abroad 
to  protect  our  product  candidates  and  important  processes  and  also  have  obtained  or  have  the  right  to  obtain  exclusive  licenses  to 
certain  patents  and  applications  filed  by  others.  However,  the  mere  issuance  of  a  patent  is  not  conclusive  as  to  its  validity  or  its 
enforceability. The U.S. Federal Courts, the U.S. Patent & Trademark Office or equivalent national courts or patent offices elsewhere 
may invalidate our patents or find them unenforceable. The America Invents Act introduced post-grant review procedures subjecting 
U.S. patents to post-grant review procedures similar to European oppositions. U.S. patents owned or licensed by us may therefore be 
subject to post-grant review procedures, as well as other forms of review and re-examination. A decision in such proceedings adverse 
to  our  interests  could  result  in  the  loss  of  valuable  patent  rights  which  would  have  a  material  adverse  effect  on  our  business.  In 
addition, the laws of foreign countries may not protect our intellectual property rights effectively or to the same extent as the laws of 
the  United  States.  If  our  intellectual  property  rights  are  not  protected  adequately,  we  may  not  be  able  to  commercialize  our 
technologies, products, or services, and our competitors could commercialize our technologies, which could result in a decrease in our 
sales  and  market  share  that  would  harm  our  business  and  operating  results.  Specifically,  the  patent  position  of  biotechnology 
companies generally is highly uncertain and involves complex legal and factual questions. The legal standards governing the validity 
of biotechnology patents are in transition, and current defenses as to issued biotechnology patents may not be adequate in the future. 
Accordingly, there is uncertainty as to: 

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whether any pending or future patent applications held by us will result in an issued patent, or whether issued patents will 
provide meaningful protection against competitors or competitive technologies; 

whether competitors will be able to design around our patents or develop and obtain patent protection for technologies, 
designs or methods that are more effective than those covered by our patents and patent applications; or 

the extent to which our product candidates could infringe on the intellectual property rights of others, which may lead to 
costly litigation, result in the payment of substantial damages or royalties, and/or prevent us from using technology that is 
essential to our business. 

We  established  a  portfolio  of  patents,  both  United  States  and  foreign,  related  to  our  bacterial  cell  expression  technology, 
including claims to novel promoter sequences, secretion signal sequences, compositions and methods for expression and secretion of 
recombinant proteins from bacteria, including immunoglobulin gene products. Most of the more important licensed European patents 
in our bacterial cell expression patent portfolio expired in July 2008 or earlier. The last of the more important licensed United States 
patents in our bacterial cell expression (“BCE”) patent portfolio expired in December 2014. The last-to-expire patent licensed under 
the majority of our BCE license agreements is Canadian patent 1,341,235, which is expected to expire in May 2018. 

22 

If certain patents issued to others are upheld or if certain patent applications filed by others issue and are upheld, we may require 
licenses  from  others  to  develop  and  commercialize  certain  potential  products  incorporating  our  technology  or  we  may  become 
involved  in  litigation  to  determine  the  proprietary  rights  of  others.  These  licenses,  if  required,  may  not  be  available  on  acceptable 
terms,  and  any  such  litigation  may  be  costly  and  may  have  other  adverse  effects  on  our  business,  such  as  inhibiting  our  ability  to 
compete in the marketplace and absorbing significant management time. 

Due to the uncertainties regarding biotechnology patents, we also have relied and will continue to rely upon trade secrets, know-
how and continuing technological advancement to develop and maintain our competitive position. All of our employees have signed 
confidentiality  agreements  under  which  they  have  agreed  not  to  use  or  disclose  any  of  our  proprietary  information.  Research  and 
development contracts and relationships between us and our scientific consultants and potential customers provide access to aspects of 
our  know-how  that  are  protected  generally  under  confidentiality  agreements.  These  confidentiality  agreements  may  be  breached  or 
may  not  be  enforced  by  a  court.  To  the  extent  proprietary  information  is  divulged  to  competitors  or  to  the  public  generally,  such 
disclosure may affect our ability to develop or commercialize our products adversely by giving others a competitive advantage or by 
undermining our patent position. 

Litigation regarding intellectual property can be costly and expose us to risks of counterclaims against us. 

We  may  be  required  to  engage  in  litigation  or  other  proceedings  to  protect  our  intellectual  property.  The  cost  to  us  of  this 
litigation, even if resolved in our favor, could be substantial. Such litigation also could divert management’s attention and resources. 
In addition, if this litigation is resolved against  us, our patents  may be declared invalid, and  we could be held liable for significant 
damages. In addition, we may be subject to a claim that we are infringing another party’s patent. If such claim is resolved against us, 
we or our collaborators may be enjoined from developing, manufacturing, selling or importing products, processes or services unless 
we obtain a license from the other party. 

Such license may not be available on reasonable terms, thus preventing us from using these products, processes or services and 

adversely affecting our revenue. 

Risks Related to Government Regulation 

We may not obtain orphan drug exclusivity, or  we may not receive the full benefit of orphan drug exclusivity even if we obtain 
such exclusivity. 

The FDA has awarded orphan drug status for XOMA 358 for congenital hyperinsulinism. Under the Orphan Drug Act, the first 
company  to  receive  FDA  approval  for  a  drug  for  the  designated  orphan  drug  indication  will  obtain  seven  years  of  marketing 
exclusivity,  during  which  time  the  FDA  may  not  approve  another  company’s  application  for  the  same  drug  for  the  same  orphan 
indication unless the FDA concludes that the later drug is safer, more effective or makes a major contribution to patient care. Even 
though we have obtained orphan drug designation for certain product candidates for certain indications and even if we obtain orphan 
drug  designation  for  our  future  product  candidates  or  for  other  indications,  due  to  the  uncertainties  associated  with  developing 
pharmaceutical  products,  we  may  not  be  the  first  to  obtain  marketing  approval  of  our  product  candidates  for  any  particular  orphan 
indication, or we may not obtain approval for an indication for which we have obtained orphan drug designation. Further, even if we 
obtain  orphan  drug  exclusivity  for  a  product,  that  exclusivity  may  not  protect  the  product  effectively  from  competition  because 
different drugs can be approved for the same indication. Even after an orphan drug is approved, the FDA can subsequently approve 
another  drug  for  the  same  orphan  indication  if  the  FDA  concludes  that  the  later  drug  is  safer,  more  effective  or  makes  a  major 
contribution to patient care. Orphan drug designation neither shortens the development time or regulatory review time of a drug, nor 
gives the drug any advantage in the regulatory review or approval process. 

Even after FDA approval, a product may be subject to additional testing or significant marketing restrictions, its approval may be 
withdrawn or it may be removed voluntarily from the market. 

Even  if  we  receive  regulatory  approval  for  our  product  candidates,  we  will  be  subject  to  ongoing  regulatory  oversight  and 
review by the FDA and other regulatory entities. The FDA, the EMA, or another regulatory agency may impose, as a condition of the 
approval, ongoing requirements for post-approval studies or post-approval obligations, including additional research and development 
and  clinical  trials,  and  the  FDA,  EMA  or  other  regulatory  agency  subsequently  may  withdraw  approval  based  on  these  additional 
trials. 

Even  for  approved  products,  the  FDA,  EMA  or  other  regulatory  agency  may  impose  significant  restrictions  on  the  indicated 
uses,  conditions  for  use,  labeling,  advertising,  promotion,  marketing  and/or  production  of  such  product.  In  addition,  the  labeling, 
packaging,  adverse  event  reporting,  storage,  advertising,  promotion  and  record-keeping  for  our  products  are  subject  to  extensive 
regulatory requirements. 

23 

Furthermore, marketing approval of a product may be withdrawn by the FDA, the EMA or another regulatory agency or such a 
product may be withdrawn voluntarily by the company marketing it based, for example, on subsequently arising safety concerns. The 
FDA, EMA and other agencies also may impose various civil or criminal sanctions for failure to comply with regulatory requirements, 
including withdrawal of product approval. 

Healthcare reform measures and other statutory or regulatory changes could adversely affect our business. 

The  United  States  and  some  foreign  jurisdictions  are  considering  or  have  enacted  a  number  of  legislative  and  regulatory 
proposals to change the healthcare system in ways that could affect our ability to sell our products, if approved, profitably. Among 
policy makers and payers in the United States and elsewhere, there is significant interest in promoting changes in healthcare systems 
with  the  stated  goals  of  containing  healthcare  costs,  improving  quality  and/or  expanding  access.  In  the  United  States,  the 
pharmaceutical industry has been a particular focus of these efforts and has been significantly affected by major legislative initiatives. 

We expect that the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation 
Act  (collectively  the  “ACA”),  as  well  as  other  healthcare  reform  measures  that  may  be  adopted  in  the  future,  may  result  in  more 
rigorous  coverage  criteria  and  in  additional  downward  pressure  on  the  price  that  we  may  receive  for  any  approved  product.  An 
expansion in the government’s role in the U.S. healthcare industry may cause general downward pressure on the prices of prescription 
drug  products,  lower  reimbursements  for  providers,  reduce  product  utilization  and  adversely  affect  our  business  and  results  of 
operations.  Moreover,  certain  politicians,  including  presidential  candidates,  have  announced  plans  to  regulate  the  prices  of 
pharmaceutical products. We cannot know what form any such legislation may take or the market’s perception of how such legislation 
would  affect  us.  Any  reduction  in  reimbursement  from  government  programs  may  result  in  a  similar  reduction  in  payments  from 
private  payors.  The  implementation  of  cost  containment  measures  or  other  healthcare  reforms  may  prevent  us  from  being  able  to 
generate  revenue,  attain  profitability,  or  commercialize  our  current  product  candidates  and/or  those  for  which  we  may  receive 
regulatory approval in the future. 

We are subject to various state and federal healthcare related laws and regulations that may impact the commercialization of our 
product candidates or could subject us to significant fines and penalties. 

Our operations may be directly or indirectly subject to various state and federal healthcare laws, including, without limitation, 
the  federal  Anti-Kickback  Statute,  the  federal  False  Claims  Act  and  state  and  federal  privacy  and  security  laws.  These  laws  may 
impact, among other things, the commercial operations for any of our product candidates that may be approved for commercial sale. 

The federal Anti-Kickback Statute prohibits persons  from  knowingly and  willfully  soliciting, offering, receiving or providing 
remuneration, directly or indirectly, in exchange for or to induce either the referral of an individual, or the furnishing or arranging for 
a good or service for which payment may be made under a federal healthcare program, such as the Medicare and Medicaid programs. 
Several  courts  have  interpreted  the  statute’s  intent  requirement  to  mean  that  if  any  one  purpose  of  an  arrangement  involving 
remuneration is to induce referrals of federal healthcare covered business, the statute has been violated. The Anti-Kickback Statute is 
broad  and  prohibits  many  arrangements  and  practices  that  are  lawful  in  businesses  outside  of  the  healthcare  industry.  Penalties  for 
violations of the  federal Anti-Kickback Statute include criminal penalties and civil sanctions such as fines, penalties, imprisonment 
and possible exclusion from Medicare, Medicaid and other federal healthcare programs. 

The federal False Claims Act prohibits persons from knowingly filing, or causing to be filed, a false claim to, or the knowing 
use of false statements to obtain payment from the federal government. Suits filed under the False Claims Act, known as “qui tam” 
actions, can be brought by any individual on behalf of the government and such individuals, commonly known as “whistleblowers”, 
may  share  in  any  amounts  paid  by  the  entity  to  the  government  in  fines  or  settlement.  The  filing  of  qui  tam  actions  has  caused  a 
number  of  pharmaceutical,  medical  device  and  other  healthcare  companies  to  have  to  defend  a  False  Claims  Act  action.  When  an 
entity is determined to have violated the False Claims Act, it may be required to pay up to three times the actual damages sustained by 
the  government,  plus  civil  penalties  for  each  separate  false  claim.  Various  states  also  have  enacted  laws  modeled  after  the  federal 
False Claims Act. 

The Federal Health Insurance Portability and Accountability Act of 1996 (“HIPAA”), created new federal criminal statutes that 
prohibit executing a scheme to defraud any healthcare benefit program and making false statements relating to healthcare matters. The 
health care fraud statute prohibits knowingly and willfully executing a scheme to defraud any health care benefit program, including 
private payors. The false statements statute prohibits knowingly and willfully falsifying, concealing or covering up a material fact or 
making any materially false, fictitious or fraudulent statement in connection with the delivery of or payment for health care benefits, 
items  or  services.  HIPAA,  as  amended  by  the  Health  Information  Technology  and  Clinical  Health  Act  (“HITECH”),  and  its 
implementing  regulations,  also  impose  certain  requirements  relating  to  the  privacy,  security  and  transmission  of  individually 
identifiable health information. We take our obligation to maintain our compliance with these various laws and regulations seriously. 

24 

In addition, there has been a recent trend of increased federal and state regulation of payments made to physicians. The ACA, 
among other things, imposed new requirements on manufacturers of drugs, devices, biologics and medical supplies for which payment 
is available under Medicare, Medicaid or the Children’s Health Insurance Program (with certain exceptions) to report annually to the 
Centers for Medicare & Medicaid Services (“CMS”), information related to payments or other “transfers of value” made to physicians 
(defined to include doctors, dentists, optometrists, podiatrists and chiropractors) and teaching hospitals, and applicable manufacturers 
and  group  purchasing  organizations  to  report  annually  to  CMS  ownership  and  investment  interests  held  by  physicians  (as  defined 
above) and their immediate family members and payments or other “transfers of value” to such physician owners and their immediate 
family members. Failure to submit required information may result in civil monetary penalties of up to an aggregate of $150,000 per 
year  (or  up  to  an  aggregate  of  $1  million  per  year  for  “knowing  failures”),  for  all  payments,  transfers  of  value  or  ownership  or 
investment interests not reported in an annual submission. 

Many states also have adopted laws similar to each of the federal laws described above, some of which apply to healthcare items 
or services reimbursed by any source, not only the Medicare and Medicaid programs. In addition, some states have laws that require 
pharmaceutical  companies  to  comply  with  the  pharmaceutical  industry’s  voluntary  compliance  guidelines  and  the  applicable 
compliance guidance promulgated by the federal government, or otherwise restrict payments that may be made to healthcare providers 
and other potential referral sources, and to report information related to payments and other transfers of value to physicians and other 
healthcare providers; and state laws governing the privacy and security of health information in certain circumstances, many of which 
differ from each other in significant ways and may not have the same effect, thus complicating compliance efforts. 

Because of the breadth of these laws, it is possible that some of our business activities could be subject to challenge under one or 
more of such laws. The ACA also make several important changes to the federal Anti-Kickback Statute, false claims laws, and health 
care fraud statute by weakening the intent requirement under the anti-kickback and health care fraud statutes that may make it easier 
for the government, or whistleblowers to charge such fraud and abuse violations. A person or entity no longer needs to have actual 
knowledge of this statute or specific intent to violate it. In addition, the ACA provides that the government may assert that a claim 
including items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for 
purposes of the false claims statutes. 

If  we  are  found  to  be  in  violation  of  any  of  the  laws  and  regulations  described  above  or  other  applicable  state  and  federal 
healthcare laws,  we  may be subject to penalties, including  civil and criminal penalties, damages,  fines, exclusion  from government 
healthcare reimbursement programs and the curtailment or restructuring of our operations, any of which could have a material adverse 
effect on our business and results of operations. 

As we do more business internationally, we will be subject to additional political, economic and regulatory uncertainties. 

We may not be able to operate successfully in any foreign market. We believe that because the pharmaceutical industry is global 
in  nature, international activities  will be a significant part of our future business activities and  when and if  we are able to generate 
income, a substantial portion of that income will be derived from product sales and other activities outside the United States. Foreign 
regulatory agencies often establish  standards different  from those in the United States, and an inability to obtain  foreign regulatory 
approvals on a timely basis could put us at a competitive disadvantage or make it uneconomical to proceed with a product or product 
candidate’s development. International sales may be limited or disrupted by: 

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imposition of government controls; 

export license requirements; 

political or economic instability; 

trade restrictions; 

changes in tariffs; 

restrictions on repatriating profits; 

exchange rate fluctuations; and 

withholding and other taxation. 

25 

Risks Related to Our Reliance on Third Parties 

We rely on third parties to provide services in connection with our product candidate development and manufacturing programs. 
The inadequate performance by or loss of any of these service providers could affect our product candidate development. 

Several third parties provide services in connection with our preclinical and clinical development programs, including in vitro 
and  in  vivo  studies,  assay  and  reagent  development,  immunohistochemistry,  toxicology,  pharmacokinetics,  clinical  trial  support, 
manufacturing and other outsourced activities. If these service providers do not adequately perform the services for which  we  have 
contracted or cease to continue operations and we are not able to find a replacement provider quickly or we lose information or items 
associated with our product candidates, our development programs may be delayed. 

Our agreements with other third parties, many of which are significant to our business, expose us to numerous risks. 

Our financial resources and our marketing experience and expertise are limited. Consequently, our ability to develop products 
successfully  depends,  to  a  large  extent,  upon  securing  the  financial  resources  and/or  marketing  capabilities  of  third  parties.  For 
example, we have licensed our bacterial cell expression technology, a set of enabling technologies used to discover and screen, as well 
as develop and manufacture, recombinant antibodies and other proteins for commercial purposes, to over 60 companies. As of March 
7,  2016,  we  were  aware  of  three  products  manufactured  using  this  technology  that  have  received  FDA  approval:  Genentech’s 
LUCENTIS® (ranibizumab injection) for treatment of neovascular wet age-related macular degeneration, Macular Edema Following 
Vein  Occulsion,  Diabetic  Macular  Edema,  and  Diabetic  Retinopathy  in  patients  with  Diabetic  Macular  Edema;  UCB’s  CIMZIA® 
(certolizumab pegol) for treatment of Crohn’s disease and rheumatoid arthritis; and Pfizer’s TRUMENBA®, a meningococcal group 
B vaccine. In the third quarter of 2009, we sold our LUCENTIS royalty interest to Genentech, andin the third quarter of 2010, we sold 
our CIMZIA royalty interest. We are receiving a fraction of a percentage royalty on sales of TRUMENBA.  

Because  our  collaborators,  licensees,  suppliers  and  contractors  are  independent  third  parties,  they  may  be  subject  to  different 
risks  than  we are and have significant discretion in, and different criteria  for, determining  the efforts and resources they  will apply 
related  to  their  agreements  with  us.  If  these  collaborators,  licensees,  suppliers  and  contractors  do  not  successfully  perform  the 
functions for which they are responsible, we may not have the capabilities, resources or rights to do so on our own. 

We do not know whether we, our collaborators or licensees will successfully develop and market any of the products that are or 
may become the subject of any of our collaboration or licensing arrangements. In some cases these arrangements provide for funding 
solely  by  our  collaborators  or  licensees,  and  in  other  cases,  all  of  the  funding  for  certain  projects  and  a  significant  portion  of  the 
funding for other projects is to be provided by our collaborator or licensee, and we provide the balance of the funding. Even when we 
have a collaborative relationship, other circumstances may prevent it from resulting in successful development of marketable products. 
In addition, third-party arrangements such as ours also increase uncertainties in the related decision-making processes and resulting 
progress under the arrangements, as we and our collaborators or licensees may reach different conclusions, or support different paths 
forward,  based  on  the  same  information,  particularly  when  large  amounts  of  technical  data  are  involved.  Under  our  contract  with 
NIAID,  we  invoice  using  NIH  provisional  rates,  and  these  are  subject  to  future  audits  at  the  discretion  of  NIAID’s  contracting 
office.  These audits can result in an adjustment to revenue previously reported, which potentially could be significant.  

Although we continue to evaluate additional strategic alliances and potential partnerships, we do not know whether or when any 

such alliances or partnerships will be entered into. 

Failure of our products to meet current Good Manufacturing Practices standards may subject us to delays in regulatory approval 
and penalties for noncompliance. 

In December of 2015, we completed the sale of our manufacturing facility to Agenus and we are now almost completely reliant 

on third parties to produce material for preclinical work, clinical trials, and commercial product. 

Our contract manufacturers are required to produce our clinical product candidates under current Good Manufacturing Practices 
(“cGMP”) to meet acceptable standards for use in our clinical trials and for commercial sale, as applicable. If such standards change, 
the ability of contract manufacturers to produce our product candidates on the schedule we require for our clinical trials or to meet 
commercial  requirements  may  be  affected.  In  addition,  contract  manufacturers  may  not  perform  their  obligations  under  their 
agreements with us or may discontinue their business before the time required by us to successfully produce clinical and commercial 
supplies of our product candidates. 

26 

Our  contract  manufacturers  are  subject  to  pre-approval  inspections  and  periodic  unannounced  inspections  by  the  FDA  and 
corresponding state and foreign authorities to ensure strict compliance with cGMP and other applicable government regulations and 
corresponding  foreign  standards.  We  do  not  have  control  over  a  third-party  manufacturer’s  compliance  with  these  regulations  and 
standards.  Any  difficulties  or  delays  in  our  contractors’  manufacturing  and  supply  of  our  product  candidates  or  any  failure  of  our 
contractors to maintain compliance with the applicable regulations and standards could increase our costs, cause us to reduce revenue, 
make  us  postpone  or  cancel  clinical  trials,  prevent  or  delay  regulatory  approval  by  the  FDA  and  corresponding  state  and  foreign 
authorities, prevent the import and/or export of our product candidates, or cause any of our product candidates that may be approved 
for commercial sale to be recalled or withdrawn. 

Certain  of  our  technologies  are  in-licensed  from  third  parties,  so  our  capabilities  using  them  are  restricted  and  subject  to 
additional risks. 

We  license  technologies  from  third  parties.  These  technologies  include  but  are  not  limited  to  phage  display  technologies 
licensed to us in connection with our bacterial cell expression technology licensing program and antibody products. However, our use 
of  these  technologies  is  limited  by  certain  contractual  provisions  in  the  licenses  relating  to  them,  and  although  we  have  obtained 
numerous licenses, intellectual property rights in the area of phage display are particularly complex. If the owners of the patent rights 
underlying the technologies that we license do not properly maintain or enforce those patents, our competitive position and business 
prospects could be harmed. If we are unable to maintain our licenses, patents or other intellectual property we could lose important 
protections that are material to continuing our operations and for future prospects. They may determine not to pursue litigation against 
other companies that are infringing these patents, or they may pursue such litigation less aggressively than we would. Our licensors 
also may seek to terminate our license, which could cause us to lose the right to use the licensed intellectual property and adversely 
affect our ability to commercialize our technologies, products or services. 

Because many of the companies with which we do business also are in the biotechnology sector, the volatility of that sector can 
affect us indirectly as well as directly. 

As a biotechnology company that collaborates with other biotechnology companies, the same factors that affect us directly also 
can adversely impact us indirectly by affecting the ability of our collaborators, partners and others with whom we do business to meet 
their obligations to us and reduce our ability to realize the value of the consideration provided to us by these other companies. 

For example, in connection  with our licensing transactions,  we  have in the past and  may in the  future agree  to accept equity 
securities of the licensee in payment of license fees. The future value of these or any other shares we receive is subject both to market 
risks affecting our ability to realize the value of these shares and more generally to the business and other risks to which the issuer of 
these shares may be subject. 

Risks Related to an Investment in Our Common Stock 

Our share price may be volatile, and there may not be an active trading market for our common stock. 

There can be no assurance the market price of our common stock will not decline below its present market price or there will be 
an active trading market for our common stock. The market prices of biotechnology companies have been and are likely to continue to 
be  highly  volatile.  Fluctuations  in  our  operating  results  and  general  market  conditions  for  biotechnology  stocks  could  have  a 
significant impact on the volatility of our common stock price. We have experienced significant volatility in the price of our common 
stock. From January 1, 2015, through March 7, 2016, the share price of our common stock has ranged from a high of $4.93 to a low of 
$0.69. Factors contributing to such volatility include, but are not limited to: 

(cid:120) 

(cid:120) 

(cid:120) 

(cid:120) 

(cid:120) 

(cid:120) 

(cid:120) 

(cid:120) 

(cid:120) 

(cid:120) 

results of preclinical studies and clinical trials; 

information relating to the safety or efficacy of products or product candidates; 

developments regarding regulatory filings; 

announcements of new collaborations; 

failure to enter into collaborations; 

developments in existing collaborations; 

our funding requirements and the terms of our financing arrangements; 

technological innovations or new indications for our therapeutic products and product candidates; 

introduction of new products or technologies by us or our competitors; 

sales and estimated or forecasted sales of products for which we receive royalties, if any; 

27 

(cid:120) 

(cid:120) 

(cid:120) 

(cid:120) 

(cid:120) 

(cid:120) 

government regulations; 

developments in patent or other proprietary rights; 

the number of shares issued and outstanding; 

the number of shares trading on an average trading day; 

announcements regarding other participants in the biotechnology and pharmaceutical industries; and 

market speculation regarding any of the foregoing. 

We may issue additional equity securities and thereby materially and adversely affect the price of our common stock. 

We expect that significant additional capital will be needed in the future to continue our planned operations. To the extent we 
raise  additional  capital  by  issuing  equity  securities,  including  pursuant  to  our  At  Market  Issuance  Sales  Agreement  (“ATM”)  with 
Cowen and Company, LLC, our stockholders may experience substantial dilution. We may sell common stock, convertible securities 
or other equity securities in one or more transactions at prices and in a manner we determine from time to time. If we sell common 
stock, convertible securities or other equity securities in more than one transaction, investors may be materially diluted by subsequent 
sales. These sales may also result in material dilution to our existing stockholders, and new investors could gain rights superior to our 
existing stockholders. We are authorized to issue, without stockholder approval, 1,000,000 shares of preferred stock, of which none 
were issued and outstanding as of March 7, 2016, which may  give other stockholders dividend, conversion, voting,  and liquidation 
rights, among other rights,  which  may be superior to the rights of  holders of our common stock.  In addition,  we are authorized to 
issue,  generally  without  stockholder  approval,  up  to  277,333,332  shares  of  common  stock,  of  which  119,615,729  were  issued  and 
outstanding  as  of  March  7,  2016.  If  we  issue  additional  equity  securities,  the  price  of  our  common  stock  may  be  materially  and 
adversely affected. 

In addition, funding from collaboration partners and others has in the past and may in the future involve issuance by us of our 
common  stock.  We  cannot  be  certain  how  the  purchase  price  of  such  shares,  the  relevant  market  price  or premium,  if  any,  will  be 
determined or when such determinations will be made. 

Any issuance by us of equity securities,  whether through an underwritten public offering, an at the market offering, a private 
placement, in connection with a collaboration or otherwise could result in dilution in the value of our issued and outstanding shares, 
and a decrease in the trading price of our common stock. 

28 

We  may  sell  additional  equity  or  debt  securities  to  fund  our  operations,  which  may  result  in  dilution  to  our  stockholders  and 
impose restrictions on our business. 

In order to raise additional funds to support our operations, we may sell additional equity or debt securities, including under our 
ATM with Cowen and Company, LLC, which would result in dilution to our stockholders or impose restrictive covenants that may 
adversely impact our business. The sale of additional equity or convertible debt securities would result in the issuance of additional 
shares  of  our  capital  stock  and  dilution  to  all  of  our  stockholders.  The  incurrence  of  indebtedness  would  result  in  increased  fixed 
payment obligations and could also result in certain restrictive covenants, such as limitations on our ability to incur additional debt, 
limitations  on  our  ability  to  acquire,  sell  or  license  intellectual  property  rights  and  other  operating  restrictions  that  could  adversely 
impact  our  ability  to  conduct  our  business.  If  we  are  unable  to  expand  our  operations  or  otherwise  capitalize  on  our  business 
opportunities, our business,  financial condition and results  of operations could be  materially adversely affected and  we  may  not be 
able to meet our debt service obligations. 

If we fail to meet continued listing standards of NASDAQ, our common stock may be delisted, which could have a material adverse 
effect on the liquidity of our common stock. 

Our common stock is currently traded on the Nasdaq Global Market tier of the Nasdaq Stock Market  (“NASDAQ”).  NASDAQ 
has  requirements  that  a  company  must  meet  in  order  to  remain  listed  on  NASDAQ.  In  particular,  NASDAQ  rules require  us  to 
maintain  a  minimum  bid  price  of  $1.00  per  share  of  our  common  stock.  As  previously  disclosed  in  our  filings  with  the  SEC  on 
September 4, 2015, we received a letter from the staff (the “Staff”) of NASDAQ on September 4, 2015, providing notification that, for 
the previous 30 consecutive business days, the bid price for the Company’s common stock had closed below the minimum $1.00 per 
share requirement for continued listing under NASDAQ’s Listing Rule 5450(a)(1), requiring a minimum bid price of $1.00 per share 
(the  “Minimum  Bid  Price  Requirement”).    On  November  2,  2015,  the  Staff  notified  us  that  it  had  determined  that  for  the  last  10 
consecutive business days, from October 19, 2015 to October 30, 2015, the closing bid of our common stock had been at or above the 
minimum $1.00 per share price. Accordingly, we have regained compliance with the Minimum Bid Price Requirement and this matter 
is  now  closed.  In  February  2016  and  March  2016,  our  stock  has  closed  below  the  minimum  $1.00  per  share.    There  can  be  no 
assurance that we will continue to meet the Minimum Bid Price Requirement, or any other requirement in the future. If we fail to meet 
the Minimum Bid Price Requirement, NASDAQ  may initiate the delisting process  with another notification letter.  If our common 
stock were to be delisted, the liquidity of our common stock would be adversely affected and the market price of our common stock 
could decrease.  

Our organizational documents contain provisions that may prevent transactions that could be beneficial to our stockholders and 
may insulate our management from removal. 

Our charter and by-laws: 

(cid:120) 

(cid:120) 

require  certain  procedures  to  be  followed  and  time  periods  to  be  met  for  any  stockholder  to  propose  matters  to  be 
considered at annual meetings of stockholders, including nominating directors for election at those meetings; and 

authorize our Board of Directors to issue up to 1,000,000 shares of preferred stock without stockholder approval and to set 
the  rights,  preferences  and  other  designations,  including  voting  rights,  of  those  shares  as  the  Board  of  Directors  may 
determine. 

In addition, we are subject to the provisions of Section 203 of the Delaware General Corporation Law (the “DGCL”), that may 
prohibit large stockholders, in particular those owning 15% or more of our outstanding common stock, from merging or combining 
with us. 

These  provisions  of  our  organizational  documents  and  the  DGCL,  alone  or  in  combination  with  each  other,  may  discourage 
transactions  involving  actual  or  potential  changes  of  control,  including  transactions  that  otherwise  could  involve  payment  of  a 
premium over prevailing market prices to holders of common stock, could limit the ability of stockholders to approve transactions that 
they  may  deem  to  be  in  their  best  interests,  and  could  make  it  considerably  more  difficult  for  a  potential  acquirer  to  replace 
management. 

29 

As a public company in the United States, we are subject to the Sarbanes-Oxley Act. We have determined our disclosure controls 
and procedures and our internal control over financial reporting are effective. We can provide no assurance that we will, at all 
times, in the future be able to report that our internal controls over financial reporting are effective. 

Companies  that  file  reports  with  the  Securities  and  Exchange  Commission,  or  the  SEC,  including  us,  are  subject  to  the 
requirements of Section 404 of the Sarbanes-Oxley Act of 2002. Section 404 requires management to establish and maintain a system 
of  internal  control  over  financial  reporting,  and  annual  reports  on  Form  10-K  filed  under  the  Securities  Exchange  Act  of  1934,  as 
amended,  or  the  Exchange  Act,  must  contain  a  report  from  management  assessing  the  effectiveness  of  our  internal  control  over 
financial reporting. Ensuring we have adequate internal financial and accounting controls and procedures in place to produce accurate 
financial statements on a timely basis is a time-consuming effort that needs to be re-evaluated frequently. Failure on our part to have 
effective internal financial and accounting controls would cause our financial reporting to be unreliable, could have a material adverse 
effect on our business, operating results, and financial condition, and could cause the trading price of our common stock to fall. 

Risks Related to Employees, Location, Data Integrity, and Litigation 

The loss of key personnel, including our Chief Executive Officer, could delay or prevent achieving our objectives. 

Our research, product development and business efforts could be affected adversely by the loss of one or more key members of 
our scientific or management staff, particularly our executive officers: John Varian, our Chief Executive Officer; Patrick J. Scannon, 
M.D., Ph.D., our Executive Vice President and Chief Scientific Officer; Paul D. Rubin, M.D., our Senior Vice President, Research and 
Development and Chief Medical Officer; James R. Neal, our Senior Vice President and Chief Operating Officer; and Thomas Burns, 
our Vice President, Finance and Chief Financial Officer. We currently do not have key person insurance on any of our employees. 

Because  we  are  a  relatively  small  biopharmaceutical  company  with  limited  resources,  we  may  not  be  able  to  attract  and  retain 
qualified personnel. 

Our  success  in  developing  marketable  products  and  achieving  a  competitive  position  will  depend,  in  part,  on  our  ability  to 
attract and retain qualified scientific and management personnel, particularly in areas requiring specific technical, scientific or medical 
expertise. After a series of restructuring activities and asset sales during 2015, we had approximately 86 employees as of March 7, 
2016.    We  may  require  additional  experienced  executive,  accounting,  research  and  development,  legal,  administrative  and  other 
personnel from time to time in the  future. There is intense competition  for the services of these personnel, especially in California. 
Moreover, we expect that the high cost of living in the San Francisco Bay Area, where our headquarters are located, may impair our 
ability to attract and retain employees in the  future. If  we do not succeed in attracting  new personnel and retaining  and  motivating 
existing personnel, our operations may suffer and we may be unable to implement our current initiatives or grow effectively. 

Calamities,  power  shortages  or  power  interruptions  at  our  Berkeley  headquarters  and  research  laboratories  could  disrupt  our 
business and adversely affect our operations. 

Our principal operations are located in Northern  California, including our corporate headquarters and research laboratories in 
Berkeley, California. This location is in an area of seismic activity near active earthquake faults. Any earthquake, terrorist attack, fire, 
power  shortage  or  other  calamity  affecting  our  facilities  may  disrupt  our  business  and  could  have  material  adverse  effect  on  our 
business and results of operations. 

Our business and operations would suffer in the event of system failures. 

Despite  the  implementation  of  security  measures,  our  internal  computer  systems  and  those  of  our  current  and  any  future 
collaborators,  licensees,  suppliers,  contractors  and  consultants  are  vulnerable  to  damage  from  cyber(cid:237)attacks,  computer  viruses, 
unauthorized access, natural disasters, terrorism, war and telecommunication and electrical failures. We could experience failures in 
our information systems and computer servers, which could be the result of a cyber(cid:237)attack and could result in an interruption of our 
normal business operations and require substantial expenditure of financial and administrative resources to remedy. System failures, 
accidents  or  security  breaches  can  cause  interruptions  in  our  operations  and  can  result  in  a  material  disruption  of  our  development 
programs and other business operations. The loss of clinical trial data from completed or future clinical trials could result in delays in 
our regulatory approval efforts and significantly increase our costs to recover or reproduce the data. Similarly, we rely on third parties 
to supply components for and manufacture our products and product candidates, and conduct clinical trials of our product candidates, 
and similar events relating to their computer systems could also have a material adverse effect on our business. To the extent that any 
disruption  or  security  breach  were  to  result  in  a  loss  of,  or  damage  to,  our  data  or  applications,  or  inappropriate  disclosure  of 
confidential or proprietary information, we could incur liability and the development of any of our other product candidates could be 
delayed or otherwise adversely affected. 

30 

Data breaches and cyber-attacks could compromise our intellectual property or other sensitive information and cause significant 
damage to our business and reputation. 

In  the  ordinary  course  of  our  business,  we  maintain  sensitive  data  on  our  networks,  including  our  intellectual  property  and 
proprietary or confidential business information relating to our business and that of our customers and business partners. The secure 
maintenance of this information is critical to our business and reputation. We believe companies have been increasingly subject to a 
wide variety of security incidents, cyber-attacks and other attempts to gain unauthorized access. These threats can come from a variety 
of sources, all ranging in sophistication from an individual hacker to a state-sponsored attack. Cyber threats may be generic, or they 
may  be  custom-crafted  against  our  information  systems.  Over  the  past  year,  cyber-attacks  have  become  more  prevalent  and  much 
harder  to  detect  and  defend  against.  Our  network  and  storage  applications  may  be  subject  to  unauthorized  access  by  hackers  or 
breached due to operator error, malfeasance or other system disruptions. It is often difficult to anticipate or immediately detect such 
incidents and the damage caused by such incidents. These data breaches and any unauthorized access or disclosure of our information 
or intellectual property could compromise our intellectual property and expose sensitive business information. A data security breach 
could  also  lead  to  public  exposure  of  personal  information  of  our  clinical  trial  patients,  customers  and  others.  Cyber-attacks  could 
cause  us  to  incur  significant  remediation  costs,  result  in  product  development  delays,  disrupt  key  business  operations  and  divert 
attention of  management and key information technology  resources. These incidents could also subject us  to liability, expose  us to 
significant expense and cause significant harm to our reputation and business. 

We and certain of our officers and directors have been named as defendants in shareholder lawsuits. These lawsuits, and potential 
similar or related lawsuits, could result in substantial damages, divert management’s time and attention from our business, and 
have a material adverse effect on our results of operations. 

Securities-related class action and shareholder derivative litigation has often been brought against companies, including many 
biotechnology  companies,  which  experience  volatility  in  the  market  price  of  their  securities.  This  risk  is  especially  relevant  for  us 
because biotechnology and biopharmaceutical companies often experience significant stock price volatility  in connection  with their 
product development programs. 

On  July  24,  2015,  a  purported  securities  class  action  lawsuit  was  filed  in  the  United  States  District  Court  for  the  Northern 
District of California, captioned Markette v. XOMA Corp., et al. (Case No. 3:15-cv-3425-HSG) naming as defendants us and certain 
of our officers.  The complaint asserts that all defendants  violated Section 10(b) of the  the Exchange  Act and SEC  Rule 10b-5, by 
making  materially  false  or  misleading  statements  regarding  the  Company’s  EYEGUARD-B  study  between  November  6,  2014  and 
July 21, 2015. The plaintiff also alleges that certain of our officers violated Section 20(a) of the Exchange Act.  The plaintiff seeks 
class certification, an award of unspecified compensatory damages, an award of reasonable costs and expenses, including attorneys’ 
fees, and other further relief as the Court may deem just and proper. We are awaiting the appointment of a lead plaintiff by the Court.  
We believe the allegations have no merit and we intend to vigorously defend against the claims. 

On October 1, 2015, a stockholder purporting to act on our behalf, filed a derivative lawsuit in the Superior Court of California 
for the County of Alameda, purportedly asserting claims on behalf of the Company against certain of our officers and the members of 
our board of directors, captioned Silva v. Scannon, et al. (Case No. RG15787990).  The lawsuit asserts claims for breach of fiduciary 
duty, corporate  waste and unjust enrichment based on the  dissemination of allegedly false and  misleading  statements related to the 
Company’s  EYEGUARD-B  study.   The  plaintiff  is  seeking  unspecified  monetary  damages  and  other  relief,  including  reforms  and 
improvements to our corporate governance and internal procedures. This action is currently stayed pending further developments in 
the securities class action.  Management believes the allegations have no merit and intends to vigorously defend against the claims. 

On November 16, and November 25, 2015, two derivative lawsuits  were filed purportedly on our behalf in the United States 
District Court for the Northern District of California, captioned Fieser v. Van Ness, et al. (Case No. 4:15-CV-05236-HSG) and Csoka 
v. Varian, et al. (Case No. 3:15-cv-05429-SI), against certain of our officers and the members of our board of directors.  The lawsuits 
assert claims  for breach of  fiduciary duty and other  violations of law  based on the dissemination of allegedly false and  misleading 
statements related to the our EYEGUARD-B study.  Plaintiffs seek unspecified monetary damages and other relief including reforms 
and improvements to our corporate governance and internal procedures. Our response to the Fieser complaint is currently due on April 
4, 2016. Our response to the Csoka Complaint is currently due on April 18, 2016. Management believes the allegations have no merit 
and intend to vigorously defend against the claims.  

31 

It is possible that additional suits  will be filed, or allegations received  from stockholders,  with respect to these  same  or other 
matters and also naming us and/or our officers and directors as defendants. These and any other related lawsuits are subject to inherent 
uncertainties, and the actual defense and disposition costs will depend upon many unknown factors. The outcome of these lawsuits are 
necessarily  uncertain.  We  could  be  forced  to  expend  significant  resources  in  the  defense  of  these  suits  and  we  may  not  prevail.  In 
addition,  we  may incur substantial legal fees and costs in connection  with these lawsuits. We currently are not able to estimate the 
possible cost to us from these lawsuits, as they are currently at an early stage, and we cannot be certain how long it may take to resolve 
these matters or the possible amount of any damages that we may be required to pay. We have not established any reserve for any 
potential  liability  relating  to  these  lawsuits.  It  is  possible  that  we  could,  in  the  future,  incur  judgments  or  enter  into  settlements  of 
claims for monetary damages. A decision adverse to our interests on these actions could result in the payment of substantial damages, 
or possibly fines, and could have a material adverse effect on our cash flow, results of operations and financial position. 

Monitoring, initiating and defending against legal actions, including the currently pending litigation, are time-consuming for our 
management,  are  likely  to  be  expensive  and  may  detract  from  our  ability  to  fully  focus  our  internal  resources  on  our  business 
activities. The outcome of litigation is always uncertain, and in some cases could include judgments against us that require us to pay 
damages, enjoin us from certain activities, or otherwise affect our legal or contractual rights, which could have a significant adverse 
effect on our business. In addition, the inherent uncertainty of the currently pending litigation and any future litigation could lead to 
increased volatility in our stock price and a decrease in the value of an investment in our common stock. 

Item 1B.  Unresolved Staff Comments 

None. 

Item 2. 

Properties 

Our  corporate  headquarters  and  research  laboratories  are  located  in  Berkeley  and  Emeryville,  California.  We  currently  lease 
three buildings that house our office space and research and development laboratories. Our building leases expire in the period from 
2021 to 2023, and total minimum lease payments due from January 2016 until expiration of the leases is $26.0 million. We have the 
option to renew our lease agreements for periods ranging from three to ten years. 

Item 3. 

Legal Proceedings 

On  July  24,  2015,  a  purported  securities  class  action  lawsuit  was  filed  in  the  United  States  District  Court  for  the  Northern 
District of California captioned Markette v. XOMA Corp., et al. (Case No. 3:15-cv-3425-HSG) against us, our Chief Executive Officer 
and our Chief Medical Officer.  The complaint asserts that all defendants violated Section 10(b) the Securities Exchange Act of 1934, 
as  amended  (the  “Exchange  Act”),  and  SEC  Rule  10b-5,  by  making  materially  false  or  misleading  statements  regarding  the 
Company’s EYEGUARD-B study between November 6, 2014 and July 21, 2015. The plaintiff also alleges that Messrs. Varian and 
Rubin  violated  Section  20(a)  of  the  Exchange  Act.    The  plaintiff  seeks  class  certification,  an  award  of  unspecified  compensatory 
damages, an award of reasonable costs and expenses, including attorneys’ fees, and other further relief as the Court may deem just and 
proper. We are awaiting the appointment of a lead plaintiff by the Court. Based on a review of the allegations, the Company believes 
that the plaintiff’s allegations are without merit, and intends to vigorously defend against the claims.  

On October 1, 2015, a stockholder purporting to act on our behalf, filed a derivative lawsuit in the Superior Court of California 
for the County of Alameda, purportedly asserting claims on behalf of the Company against certain of our officers and the members of 
our board of directors, captioned Silva v. Scannon, et al. (Case No. RG15787990). The lawsuit asserts claims for breach of fiduciary 
duty, corporate  waste and unjust enrichment based on the  dissemination of allegedly false and  misleading  statements related to the 
Company’s  EYEGUARD-B  study.   The  plaintiff  is  seeking  unspecified  monetary  damages  and  other  relief,  including  reforms  and 
improvements to our corporate governance and internal procedures. This action is currently stayed pending further developments in 
the securities class action Management believes the allegations have no merit and intends to vigorously defend against the claims. 

On November 16, and November 25, 2015, two derivative lawsuits  were filed purportedly on our behalf in the United States 
District Court for the Northern District of California, captioned Fieser v. Van Ness, et al. (Case No. 4:15-CV-05236-HSG) and Csoka 
v. Varian, et al. (Case No. 3:15-cv-05429-SI), against certain of our officers and the members of our board of directors.  The lawsuits 
assert claims  for breach of  fiduciary duty and other  violations of law  based on the dissemination of allegedly false and  misleading 
statements related to the Company’s EYEGUARD-B study.  Plaintiffs seek unspecified monetary damages and other relief including 
reforms and improvements to our corporate governance and internal procedures. Our response to the Fieser complaint is currently due 
on April 4, 2016. Our response to the Csoka Complaint is currently due on April 18, 2016. Management believes the allegations have 
no merit and intend to vigorously defend against the claims. 

32 

 
 
 
 
 
 
 
 
Item 4.  Mine Safety Disclosures 

Not applicable. 

33 

 
PART II 

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

Market for Registrant’s Common Equity 

Our common stock trades on The Nasdaq Global Market tier of the Nasdaq Stock Market (“NASDAQ”) under the symbol 
“XOMA.” The following table sets forth the quarterly range of high and low reported sale prices of our common stock on NASDAQ 
for the periods indicated: 

2015 
First Quarter ...............................................................................   $
Second Quarter ..........................................................................   $
Third Quarter .............................................................................   $
Fourth Quarter............................................................................   $

2014 
First Quarter ...............................................................................   $
Second Quarter ..........................................................................   $
Third Quarter .............................................................................   $
Fourth Quarter............................................................................   $

Price Range 

High 

Low 

4.33    $ 
4.41    $ 
4.93    $ 
2.03    $ 

9.57    $ 
5.54    $ 
4.95    $ 
5.95    $ 

3.22  
2.92  
0.69  
0.90  

4.77  
3.42  
3.66  
3.50  

On March 7, 2016, there were 832 stockholders of record of our common stock, one of which was Cede & Co., a nominee for 
Depository  Trust  Company  (“DTC”).    All  of  the  shares  of  our  common  stock  held  by  brokerage  firms,  banks  and  other  financial 
institutions as nominees for beneficial owners are deposited into participant accounts at DTC and are therefore considered to be held 
of record by Cede & Co. as one stockholder. 

Dividend Policy 

We have not paid dividends on our common stock. We currently intend to retain any earnings for use in the development and 
expansion of our business. We, therefore, do not anticipate paying cash dividends on our common stock in the foreseeable future. In 
addition, our loan agreement with Hercules generally restricts the declaration and payment of cash dividends. 

Recent Sales of Unregistered Securities 

Except as previously reported in our quarterly reports on Form 10-Q and current reports on Form 8-K filed with the Securities 
and Exchange Commission, or SEC, during the year ended December 31, 2015, there were no unregistered sales of equity securities 
by us during the year ended December 31, 2015. 

34 

 
 
  
  
 
 
  
 
    
 
   
      
  
  
   
      
  
   
      
  
  
 
Performance Graph 

The following graph compares the five-year cumulative total stockholder return for XOMA common stock with the comparable 
cumulative return of certain indices. The graph assumes $100 invested on the same date in each of the indices. Returns of the company 
are not indicative of future performance. 

FIVE-YEAR PERFORMANCE GRAPH

S
R
A
L
L
O
D

.

.

S
U

 $400

 $350

 $300

 $250

 $200

 $150

 $100

 $50

 $-

2010

2011

2012

2013

2014

2015

XOMA
Corporation

Nasdaq
Composite…

AMEX
Biotechnology…

This Section is not “soliciting material,” is not deemed “filed” with the SEC and is not to be incorporated by reference in any 
filing  of  XOMA  Corporation  under  the  Securities  Act,  or  the  Exchange  Act,  whether  made  before  or  after  the  date  hereof  and 
irrespective of any general incorporation language in any such filing. 

As of December 31, 
2010 ..........................................................................................  $
2011 ..........................................................................................  $
2012 ..........................................................................................  $
2013 ..........................................................................................  $
2014 ..........................................................................................  $
2015 ..........................................................................................  $

XOMA 

Corporation    

Nasdaq 
Composite 
Index 

AMEX 
Biotechnology
Index

100.00    $
22.42    $
46.78    $
131.19    $
69.98    $
25.93    $

100.00     $ 
98.20     $ 
113.82     $ 
157.44     $ 
178.53     $ 
188.75     $ 

100.00 
84.11 
119.22 
179.59 
265.03 
293.92  

35 

 
 
  
  
 
    
 
  
 
 
Item 6. 

Selected Financial Data 

The following table contains our selected financial information including consolidated statement of operations and consolidated 
balance sheet data for the years 2011 through 2015. The selected financial information has been derived from our audited consolidated 
financial  statements.  The  selected  financial  information  should  be  read  in  conjunction  with  Item  8:  Financial  Statements  and 
Supplementary Data and Item 7: Management’s Discussion and Analysis of Financial Condition and Results of Operations included 
in this Annual Report. The data set forth below is not necessarily indicative of the results of future operations. 

2015 

Year Ended December 31, 
2012 
2013 
2014 
(In thousands, except per share amounts) 

Consolidated Statement of Operations Data 
Total revenues .......................................................................   $
Restructuring costs ................................................................  
Operating costs and expenses................................................  
Loss from operations .............................................................  
Other income (expense), net (1) .............................................  
Loss before taxes ...................................................................  
Income tax benefit (expense), net .........................................  
Net loss .................................................................................   $
Basic net loss per share of common stock .............................   $
Diluted net loss per share of common stock..........................   $

55,447   $
3,699    
91,472    
(39,724)    
19,118    
(20,606)    
—    
(20,606)   $
(0.17)   $
(0.17)   $

18,866    $
84     
100,614     
(81,832)    
43,531     
(38,301)    
—     

35,451     $ 
328       
93,328       
(58,205 )     
(65,867 )     
(124,072 )     
14       
(38,301)   $ (124,058 )   $ 
(1.43 )   $ 
(1.43 )   $ 

(0.36)   $
(0.67)   $

33,782    $
5,074     
85,332     
(56,624)    
(14,515)    
(71,139)    
74     
(71,065)   $
(1.10)   $
(1.10)   $

2011 

58,196 
— 
92,151 
(33,955)
1,227 
(32,728)
(15)
(32,743)
(1.04)
(1.04)

2015 

2014 

December 31, 
2013 
(In thousands) 

2012 

2011 

Balance Sheet Data 
48,344 
Cash and cash equivalents ......................................................   $
— 
Marketable securities .............................................................   $
62,695 
Current assets .........................................................................   $
42,064 
Working capital ......................................................................   $
78,036 
Total assets .............................................................................   $
20,631 
Current liabilities ...................................................................   $
Long-term liabilities (2) ...........................................................   $
42,394 
Redeemable convertible preferred stock, at par value............   $
— 
Accumulated deficit ...............................................................   $(1,140,083)   $(1,119,477)   $(1,081,176 )   $  (957,118)   $ (886,053)
15,011  
Total stockholders' (deficit) equity.........................................   $

45,345    $
39,987    $
95,837    $
72,004    $
134,782     $  105,676    $
23,833    $
60,376    $
—    $

78,445    $
—    $
83,613    $
47,367    $
89,402    $
36,246    $
50,057    $
—    $

65,767    $
496    $
72,219    $
48,924    $
74,880    $
23,295    $
53,894    $
—    $

101,659     $ 
19,990     $ 
127,060     $ 
97,415     $ 

29,645     $ 
109,124     $ 
—     $ 

(3,987 )   $ 

21,467    $

(2,309)   $

3,099    $

We have paid no dividends in the past five years. 
(1) 

(2) 

2015, 2014 and 2013 and 2012 include $17.8 million, $45.8 million, ($61.0) million and ($9.2) million, respectively, related to 
the revaluation of contingent warrant liabilities issued in connection with equity financings in June 2009, February 2010, March 
2012 and December 2014. All outstanding warrants issued in June 2009 and February 2010 expired in June 2014 and February 
2015, respectively.  
2015,  2014  2013  and  2012  include  $10.5  million,  $31.8  million,  $69.9  million  and  $15.0  million,  respectively,  related  to 
contingent  warrant  liabilities  in  connection  with  equity  financings  in  June  2009,  February  2010,  March  2012  and  December 
2014. All outstanding warrants issued in June 2009 and February 2010 expired in June 2014 and February 2015, respectively. 
The balance in 2015, 2014, 2013, 2012, and 2011 includes a term loan from Hercules, which had a principal balance equal to 
$20.0 million as of December 31, 2015 and a term loan from GECC, which had a principal balance equal to zero, $5.2 million, 
$9.4 million, $12.5 million, and $10.0 million as of December 31, 2015, 2014, 2013, 2012, and 2011, respectively. 

36 

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

Overview 

XOMA  Corporation  (“XOMA”),  a  Delaware  corporation,  is  a  development  stage  biotechnology  company  with  a  portfolio  of 
therapeutic antibodies. Our product candidates are the result of our expertise in developing new monoclonal antibodies, which have 
created new opportunities to potentially treat a wide range of endocrine diseases. We discover and develop innovative antibody-based 
therapeutics. Several of our antibodies have unique properties due to their interaction at allosteric sites on a specific protein rather than 
at  the  orthosteric,  or  active,  sites.  The  antibodies  are  designed  to  either  enhance  or  diminish  the  protein’s  activity  as  desired.   We 
believe  allosteric  modulating  antibodies  may  be  more  selective  and  offer  a  safety  advantage  in  certain  disease  indications  when 
compared to more traditional modes of action. 

Our business efforts are focused on advancing the assets in our portfolio of compounds that could treat a variety of endocrine 
diseases.    Our  product  candidates  are  in  various  stages  of  development  and  are  subject  to  regulatory  approval  before  they  can  be 
commercially launched.  

We  currently  have  five  assets  in  our  endocrine  portfolio,  two  of  which  were  developed  as  part  of  our  proprietary  XOMA 
Metabolism (“XMet”) platform. We believe the XMet platform is highly novel as it targets the insulin receptor and has generated new 
classes of fully human allosteric modulating monoclonal antibodies known as Selective Insulin Receptor Modulators (“SIRMs”). One 
program of SIRMs produced by the XMet Platform is a negative allosteric modulator of the insulin receptor (“XMetD”). We intend to 
advance the following two antibodies derived from the XMetD program, which presents potential new therapeutic approaches to the 
treatment of rare diseases that involve insulin and result in severe hypoglycemia.  

(cid:120) 

(cid:120) 

XOMA 358, a potential long-acting treatment for hyperinsulinemic hypoglycemia; and 

XOMA 129, a potential rapid onset, short-acting treatment for severe acute hypoglycemia. 

Our endocrine portfolio also includes what we believe is a Phase 2-ready product candidate, XOMA 213, targeting the prolactin 
receptor  as  well  as  research-stage  programs  targeting  the  parathyroid  receptor  (“PTH1R”)  and  the  adrenal  corticotropic  hormone 
(“ACTH”). 

Given our focus on endocrine diseases, we have determined that gevokizumab no longer fits our strategic focus and we have 
decided  to  stop  all  development  activities  on  the  asset.  As  a  result,  we  are  closing  the  Phase  3  program  in  patients  suffering  from 
pyoderma  gangrenosum  (“PG”)  and  will  immediately  pursue  licensing  discussions  with  potential  interested  parties.  Further 
information regarding our corporate strategy and proprietary products is included in Part 1 Item 1 of this annual report on Form 10-K. 

Significant Developments in 2015  

Licensing 

(cid:120) 

(cid:120) 

On September 30, 2015, we entered into a license agreement with Novartis International Pharmaceutical Ltd. (“Novartis 
International”)  pursuant  to  which  we  have  granted  to  Novartis  International  an  exclusive,  world-wide,  royalty-bearing 
license to XOMA’s anti-TGF(cid:533) program. Under the terms of the license agreement, we received $37 million in the form of 
an  upfront  payment  and  are  eligible  to  receive  up  to  $480  million  if  all  development,  regulatory,  and  commercial 
milestones are met. In addition, we are eligible to receive royalties on product sales that range from the mid-single digits 
to the low double digits. In connection with this license agreement, we have agreed to reduce our royalty rate associated 
with  sales  of  Novartis  International'  clinical  stage  anti-CD40  antibodies.  All  other  terms  of  the  2004  collaboration 
agreement remained unchanged. 

In December 2015, we entered into a settlement and amended license agreement with Pfizer Inc. (“Pfizer”), pursuant to 
which  we  granted  Pfizer  a  fully-paid,  royalty-free,  worldwide,  irrevocable,  non-exclusive  license  rights  to  our  patented 
bacterial  cell  expression  technology  for  phage  display  and  other  research,  development  and  manufacturing  of  antibody 
products for a cash payment by Pfizer of $3.8 million in full satisfaction of all obligations to us under the August 27, 2007 
license agreement between XOMA Ireland  Limited and Pfizer, including but  not limited to potential  milestone, royalty 
and other fees under the 2007 license agreement. 

37 

(cid:120) 

In December 2015, we entered into a license agreement with Novo Nordisk A/S (“Novo Nordisk”) pursuant to which we 
granted  to  Novo  Nordisk  an  exclusive,  world-wide,  royalty-bearing  license  to  our  XMetA  program  of  allosteric 
monoclonal antibodies that positively modulate the insulin receptor, subject to our retained commercialization rights for 
rare  disease  indications.  Novo  Nordisk  has  an  option  to  add  these  additional  rights  to  its  license  upon  payment  of  an 
option  fee  to  us.  Under  the  agreement,  we  received  a  $5.0  million  upfront  payment.  Based  on  the  achievement  of  pre-
specified criteria, we are eligible to receive up to $290.0 million in development, regulatory and commercial milestones. 
We are also eligible to receive royalties on sales of licensed products,  which are tiered based on sales levels and range 
from a mid-single digit percentage rate to up to a high single digit percentage rate. 

XOMA 358 

(cid:120) 

(cid:120) 

(cid:120) 

In  March  2015,  we  announced  that  we  successfully  completed  a  Phase  1  clinical  study  of  XOMA  358,  a  fully  human, 
allosteric  monoclonal  antibody  that  attenuates  both  the  binding  of  insulin  to  its  receptor  and  downstream  insulin 
signaling.  We  have  presented  the  data  at  the  ENDO  2015  meeting  and  at  the  American  Diabetes  Association’s  75th 
Scientific Sessions.  XOMA 358 is being evaluated for the treatment of non-drug-induced, endogenous hyperinsulinemic 
hypoglycemia. 

In June 2015,  we announced  that  we have been  granted Orphan Drug Designation  for XOMA 358 by the FDA  for the 
treatment  of  congenital  hyperinsulinism,  a  hereditary  disease  resulting  in  lack  of  insulin  regulation  and  profound 
hypoglycemia that can result in seizures and brain damage. 

In  October  2015,  we  initiated  a  single-dose  Phase  2  proof-of-concept  study  of  XOMA  358  in  patients  with  congenital 
hyperinsulinism.  In  addition,  we  intend  to  initiate  a  single-dose  Phase  2  proof-of-concept  study  in  patients  who 
experience hyperinsulinism post bariatric surgery.   

Financing 

(cid:120) 

(cid:120) 

(cid:120) 

On  January  9,  2015,  we  entered  into  Amendment  No.  2  to  our  loan  agreement  with  Servier,  initially  entered  into  on 
December 30, 2010, and subsequently amended by a Consent, Transfer, Assumption and Amendment Agreement entered 
into  as  of  August  12,  2013.  Amendment  No.  2  modified  the  maturity  date  of  the  loan  from  January  13,  2016  to  three 
tranches of principal to be paid as follows: €3.0 million on January 15, 2016, €5.0 million on January 15, 2017 and €7.0 
million on January 15, 2018. All other terms of the Servier Loan Agreement remained unchanged. 

On February 27, 2015, we entered into a loan and security agreement with Hercules Technology Growth Capital, Inc. (the 
“Hercules Term Loan”), under which we borrowed $20.0 million. We used a portion of the proceeds under the Hercules 
Term Loan to repay the General Electric Capital Corporation (“GECC”) outstanding principle balance, final payment fee, 
prepayment fee, and accrued interest amounts totaling $5.5 million.   

On June 19, 2015, we and Novartis Vaccines and Diagnostics, Inc. (“NVDI”), agreed to extend the maturity date on the 
approximately $13.5 million of outstanding debt under our secured note agreement from June 21, 2015 to September 30, 
2015. On September 30, 2015, in connection with the license agreement entered into with Novartis International, NVDI 
agreed  to  extend  the  maturity  date  on  the  $13.5  million  of  outstanding  debt  under  our  secured  note  agreement  to 
September 30, 2020. All other terms of the note agreement remained unchanged. 

Restructuring 

(cid:120) 

On August 21, 2015, in connection with our efforts to lower operating expenses and preserve capital while continuing to 
focus on our product pipeline,  we implemented a  workforce reduction of 38 employees  and the elimination of 20 open 
positions. On September 29, 2015, we terminated an additional five employees and on October 20, 2015, we terminated 
an additional nine employees.  In addition, we cancelled our contracts with clinical manufacturing organizations and site 
investigators following the discontinuation of our EYEGUARD-B and EYEGUARD-E studies, as discussed below.  

38 

Sale of Manufacturing Facility and Biodefense Assets  

(cid:120) 

(cid:120) 

On November 4, 2015, we entered into an asset purchase agreement (the “Nanotherapeutics Purchase Agreement”) with 
Nanotherapeutics  Inc.  (“Nanotherapeutics”),  pursuant  to  which  Nanotherapeutics  agreed,  subject  to  the  terms  and 
conditions set  forth in the Nanotherapeutics Purchase  Agreement, to acquire our biodefense business and related assets 
(including, subject to regulatory approval, certain contracts with the U.S. government), and to assume certain liabilities of 
XOMA (the “Transaction”).  As part of the Transaction, the parties will, subject to the terms and conditions of the asset 
purchase  agreement  and  the  satisfaction  of  certain  conditions,  enter  into  an  intellectual  property  license  agreement  (the 
“License Agreement”), pursuant to which we agreed to license to Nanotherapeutics, subject to the terms and conditions 
set forth in the License Agreement, certain intellectual property rights related to the purchased assets. Under the License 
Agreement, we are eligible for up to $4.5 million of cash payments upon Nanotheraputics’ execution of a contract with 
the Defense Threat Reduction Agency. In addition, we are eligible to receive 15% royalties on net sales of products.  

On  November  5,  2015,  we  entered  into  an  asset  purchase  agreement  (the  “Agenus  Purchase  Agreement”)  with  Agenus 
West, LLC, a wholly-owned subsidiary of Agenus Inc. (“Agenus”), pursuant to which Agenus agreed, subject to the terms 
and conditions set forth in the Agenus Purchase Agreement, to acquire our pilot scale manufacturing facility in Berkeley, 
California, together with certain related assets, including a license to certain intellectual property related to the purchased 
assets, and to assume certain liabilities of XOMA, in consideration for the payment to us of up to $5.0 million in cash and 
the issuance to XOMA of shares of Agenus’ common stock having an aggregate value of up to $1.0 million. The Agenus 
Purchase Agreement closed on December 31, 2015. At closing, we received net cash of $4.7 million, net of the assumed 
liabilities of $0.3 million. In addition to the cash consideration, we received 109,211 shares of common stock of Agenus 
with  an  aggregate  value  of  $0.5  million.  The  remaining  common  stock  of  Agenus  will  only  be  received  upon  our 
satisfaction of certain operational  matters,  which XOMA  may or  may  not be able to satisfy. We believe that the assets 
related to the manufacturing facility and certain other assets sold to Agenus include all key inputs and processes necessary 
to generate output from a market participant’s perspective. Accordingly, we have determined that such assets qualify as a 
business. 

Gevokizumab 

(cid:120) 

On May 28, 2015, we announced that the gevokizumab Phase 3 EYEGUARD-B study, sponsored by Servier, reached its 
target exacerbation event as specified in the study design. The objective of the first part of this study was to demonstrate 
the  superiority  of  gevokizumab,  as  compared  to  placebo,  on  top  of  the  current  standard  of  care  (immunosuppressant 
therapy and oral corticosteroids) in reducing the risk of Behçet's disease uveitis exacerbations and to assess the safety of 
gevokizumab. On July 22, 2015, we announced the Phase 3 EYEGUARD-B study did not reach its primary endpoint of 
time  to  first  acute  ocular  exacerbation.  On  September  28,  2015,  Servier  notified  us  of  its  intention  to  terminate  our 
collaboration and license agreement and return the  gevokizumab rights to XOMA. The termination of the collaboration 
and license agreement will be effective on March 25, 2016.   

(cid:120) 

In March 2016, we announced we are closing our Phase 3 study of gevokizumab in PG.  A preliminary review of the data 
from the study did not show a clear signal of activity in PG. 

Critical Accounting Estimates 

The accompanying discussion and analysis of our financial condition and results of operations are based upon our consolidated 
financial  statements  and  the  related  disclosures,  which  have  been  prepared  in  accordance  with  accounting  principles  generally 
accepted in the United States. The preparation of these financial statements requires us to make estimates, assumptions and judgments 
that affect the reported amounts in our consolidated financial statements and accompanying notes. On an ongoing basis, we evaluate 
our  estimates,  assumptions  and  judgments  described  below  that  have  the  greatest  potential  impact  on  our  consolidated  financial 
statements,  including  those  related  to  revenue  recognition,  research  and  development  activities  warrant  liabilities  and  stock-based 
compensation.    We  base  our  estimates  on  historical  experience  and  on  various  other  assumptions  that  we  believe  to  be  reasonable 
under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities 
that are not readily apparent from other sources. Accounting assumptions and estimates are inherently uncertain and actual results may 
differ materially from these estimates under different assumptions or conditions. 

The  consolidated  financial  statements  include  the  accounts  of  XOMA  and  its  wholly-owned  subsidiaries.  All  significant 

intercompany accounts and transactions among the entities have been eliminated. 

While  our  significant  accounting  policies  are  more  fully  described  in  Note  2  to  the  Consolidated  Financial  Statements,  we 
believe the following policies to be the most critical to an understanding of our financial condition and results of operations because 
they require us to make estimates, assumptions and judgments about matters that are inherently uncertain. 

39 

Revenue Recognition 

License and Collaborative Fees 

Revenue from non-refundable license, technology access or other payments under license and collaborative agreements where 
we  have  a  continuing  obligation  to  perform  is  recognized  as  revenue  over  the  estimated  period  of  the  continuing  performance 
obligation.  We  estimate  the  performance  period  at  the  inception  of  the  arrangement  and  re-evaluate  it  each  reporting  period. 
Management  makes  its  best  estimate  of  the  period  over  which  it  expects  to  fulfill  the  performance  obligations,  which  may  include 
clinical development activities. Given the uncertainties of research and development collaborations, significant judgment is required to 
determine the duration of the performance period. This re-evaluation  may shorten or lengthen the period over  which the remaining 
revenue is recognized. Changes to these estimates are recorded on a prospective basis.  

Our license and collaboration agreements with certain third parties also provide for contingent payments to be paid to us based 
solely upon the performance of the partner. For such contingent payments we recognize the payments as revenue upon completion of 
the milestone event, once confirmation is received from the third party, provided that collection is reasonably assured and the other 
revenue recognition criteria have been satisfied. 

Contract Revenue 

Contract revenue for research and development involves our providing research and development and manufacturing services to 
collaborative partners, biodefense contractors or others. Cost reimbursement revenue under collaborative agreements is recognized as 
the  related  research  and  development  costs  are  incurred,  as  provided  for  under  the  terms  of  these  agreements.  Revenue  for  certain 
contracts is accounted for by a proportional performance, or output-based, method where performance is based on estimated progress 
toward elements defined in the contract. The amount of contract revenue and related costs recognized in each accounting period are 
based  on  estimates  of  the  proportional  performance  during  the  period.  Adjustments  to  estimates  based  on  actual  performance  are 
recognized on a prospective basis and do not result in reversal of revenue should the estimate to complete be extended. 

In addition, revenue related to certain research and development contracts is billed based on actual hours incurred by XOMA 
related to the contract, multiplied by full-time equivalent (“FTE”) rates plus a mark-up. The FTE rates are developed based on our best 
estimates  of  labor,  materials  and  overhead  costs.  For  certain  contracts,  such  as  our  government  contracts,  the  FTE  rates  are  agreed 
upon at the beginning of the contract and are subject to review or audit by the contracting party at any time. Under our contracts with 
NIAID,  a  part  of  the  NIH,  we  bill  using  NIH  provisional  rates  and  thus  are  subject  to  future  audits  at  the  discretion  of  NIAID’s 
contracting office. These audits can result in adjustments to previously reported revenue. 

In  2011,  the  NIH  conducted  an  audit  of  our  actual  data  under  two  contracts  for  the  period  from  January  1,  2007,  through 
December  31,  2009,  and  developed  final  billing  rates  for  this  period.  As  a  result,  we  retroactively  applied  these  NIH  rates  to  the 
invoices from this period, which resulted in an increase in revenue of $3.1 million from the NIH, excluding $0.9 million billed to the 
NIH in 2010 as a result of a comparison of 2009 calculated costs incurred and costs billed to the government under provisional rates. 
Final  rates  were  settled  for  one  contract  resulting  in  the  recognition  of  revenue  of  $2.0  million  in  2012.  The  remaining  deferred 
revenue in connection with the 2011 NIH rate audit will be recognized upon negotiation with and approval by NIH. In 2014, upon 
completion of a NIAID review of hours and external expenses for the period spanning from 2008 to 2013, XOMA agreed to exclude 
certain hours and external expense resulting in a $1.8 million adjustment, which reduced deferred revenue and accounts receivable. 

Upfront fees associated with contract revenue are recorded as license and collaborative fees and are recognized ratably over the 
expected  benefit  period  under  the  arrangement.  Given  the  uncertainties  of  research  and  development  collaborations,  significant 
judgment is required to determine the duration of the arrangement. 

Research and Development Expenses 

We  expense  research  and  development  costs  as  incurred.  Research  and  development  expenses  consist  of  direct  costs  such  as 
salaries  and  related  personnel  costs,  and  material  and  supply  costs,  and  research-related  allocated  overhead  costs,  such  as  facilities 
costs.  In  addition,  research  and  development  expenses  include  costs  related  to  clinical  trials.  From  time  to  time,  research  and 
development expenses may include up-front fees and milestones paid to collaborative partners for the purchase of rights to in-process 
research and development. Such amounts are expensed as incurred. 

40 

Our  accrual  for  clinical  trials  is  based  on  estimates  of  the  services  received  and  efforts  expended  pursuant  to  contracts  with 
clinical trial centers and clinical research organizations. Payments under the contracts depend on factors such as the achievement of 
certain  events,  successful  enrollment  of  patients,  and  completion  of  portions  of  the  clinical  trial  or  similar  conditions.  We  may 
terminate these contracts upon written notice and we are generally only liable for actual effort expended by the organizations to the 
date of termination, although in certain instances we may be further responsible for termination fees and penalties. We make estimates 
of  our  accrued  expenses  as  of  each  balance  sheet  date  based  on  the  facts  and  circumstances  known  to  us  at  that  time.  Expenses 
resulting from clinical trials are recorded when incurred based, in part, on estimates as to the status of the various trials. There have 
been no material adjustments to our prior period accrued estimates for clinical trial activities through December 31, 2015. 

Biopharmaceutical development includes a series of steps, including in vitro and in vivo preclinical testing, and Phase 1, 2 and 3 
clinical studies in humans. Each of these steps is typically more expensive than the previous step, but actual timing and the cost to us 
depends on the product being tested, the nature of the potential disease indication and the terms of any collaborative or development 
arrangements  with  other  companies  or  entities.  After  successful  conclusion  of  all  of  these  steps,  regulatory  filings  for  approval  to 
market the products must be completed, including approval of manufacturing processes and facilities for the product.  

Stock-based Compensation 

Stock-based compensation expense for stock options and other stock awards is estimated at the grant date based on the award’s 
fair  value-based  measurement  and  is  recognized  on  a  straight-line  basis  over  the  award’s  vesting  period,  assuming  appropriate 
forfeiture rates. The valuation of stock-based compensation awards is determined at the date of grant using the Black-Scholes option 
pricing model (the “Black-Scholes Model”). This model requires highly complex and subjective inputs, such as the expected term of 
the  option,  expected  volatility,  and  risk-free  interest  rate.  Further,  the  forfeiture  rate  also  impacts  the  amount  of  aggregate 
compensation. These inputs are subjective and generally require significant analysis and judgment to develop. Our current estimate of 
volatility is based on the historical volatility of our stock price. To the extent volatility in our stock price increases in the future, our 
estimates  of  the  fair  value  of  options  granted  in  the  future  could  increase,  thereby  increasing  stock-based  compensation  cost 
recognized in future periods. To establish an estimate of expected term, we consider the vesting period and contractual period of the 
award  and  our  historical  experience  of  stock  option  exercises,  post-vesting  cancellations  and  volatility.  To  establish  an  estimate  of 
forfeiture rate,  we consider our historical experience of option  forfeitures and terminations. The risk-free rate is based on the  yield 
available on United States Treasury zero-coupon issues. We review our valuation assumptions quarterly and, as a result, we likely will 
change our valuation assumptions used to value stock-based awards granted in future periods. Stock-based compensation expense is 
recognized  ratably  over  the  requisite  service  period.  In  the  future,  as  additional  empirical  evidence  regarding  these  input  estimates 
becomes  available,  we  may  change  or  refine  our  approach  of  deriving  these  input  estimates.  These  changes  could  impact  our  fair 
value-based measurement of stock options granted in the future. Changes in the fair value-based measurement of stock awards could 
materially impact our operating results. 

Warrants 

We have issued warrants to purchase shares of our common stock in connection with financing activities. We account for some 
of  these  warrants  as  a  liability  at  estimated  fair  value  and  others  as  equity  at  estimated  fair  value.  The  estimated  fair  value  of  the 
outstanding  warrants  is  estimated  using  the  Black-Scholes  Model.  The  Black-Scholes  Model  requires  inputs,  such  as  the  expected 
term  of  the  warrants,  expected  volatility  and  risk-free  interest  rate.  These  inputs  are  subjective  and  require  significant  analysis  and 
judgment to develop. For the estimate of the expected term, we use the full remaining contractual term of the warrant. We determine 
the expected volatility based  on the historical  stock price volatility of XOMA’s  underlying  stock. The assumptions  associated  with 
contingent warrant liabilities are reviewed each reporting period and changes in the estimated fair value of these contingent warrant 
liabilities  are  recognized  as  gain  or  loss  in  the  revaluation  of  contingent  warrant  liabilities  line  in  the  consolidated  statement  of 
comprehensive loss. 

Results of Operations 

Revenues 

Total revenues for the years ended December 31, 2015, 2014, and 2013, were as follows (in thousands): 

License and collaborative fees ..............................................   $
Contract and other .................................................................  
Total revenues .......................................................................   $

49,064   $
6,383    
55,447   $

5,683    $
13,183     
18,866    $

Year Ended December 31, 
2014 

2015 

41 

2013 
11,028     $ 
24,423       
35,451     $ 

2014-2015 
Change 

2013-2014 
Change 

43,381    $
(6,800)    
36,581    $

(5,345)
(11,240)
(16,585)

  
  
 
     
   
 
  
 
   
   
     
   
 
  
License and Collaborative Fees 

License  and  collaborative  fees  include  fees  and  milestone  payments  related  to  the  out-licensing  of  our  products  and 
technologies.  The  primary  components  of  license  and  collaboration  fees  in  2015  were  $46.3  million  in  upfront  and  milestone 
payments  relating  to  various  out-licensing  arrangements,  $1.6  million  in  annual  maintenance  fees  relating  to  various  out-licensing 
arrangements and $1.2 million in revenue recognized related to the loan agreement  with Servier. The $46.3 million  included $37.0 
million upfront payment from Novartis, $5.0 million upfront payment from Novo Nordisk and $3.8 million payment from Pfizer. 

The primary components of license and collaboration fees in 2014 were $3.0 million in milestone payments relating to various 
out-licensing arrangements, $1.9 million in revenue recognized related to the loan agreement with Servier and $0.8 million in upfront 
fees and annual maintenance fees relating to various out-licensing arrangements. 

The primary components of license and collaboration fees in 2013 were $8.6 million in milestone payments relating to various 
out-licensing arrangements, including $7.0 million milestone payment from Novartis, $1.6 million in revenue recognized related to the 
loan  agreement  with  Servier,  and  $0.8  million  in  upfront  fees  and  annual  maintenance  fees  relating  to  various  out-licensing 
arrangements.  

The  generation  of  future  revenues  related  to  license  and  other  collaborative  fees  is  dependent  on  our  ability  to  attract  new 

licensees and new collaboration partners to our antibody technologies, or the achievement of milestones by our existing licensees. 

Contract and Other Revenues 

Contract and other revenues include agreements where we provide contracted research and development services to our contract 
and collaboration partners, including Servier and NIAID. Contract and other revenues also include net product sales and royalties. The 
following  table  shows  the  activity  in  contract  and  other  revenues  for  the  years  ended  December  31,  2015,  2014,  and  2013  (in 
thousands): 

NIAID ...................................................................................   $
Servier ...................................................................................  
Other .....................................................................................  
Total contract and other revenues .........................................   $

5,084   $
1,178    
121    
6,383   $

9,565    $
3,523     
95     
13,183    $

9,098     $ 
13,568       
1,757       
24,423     $ 

(4,481)   $
(2,345)    
26     
(6,800)   $

467 
(10,045)
(1,662)
(11,240)

Year Ended December 31, 
2014 

2015 

2013 

2014-2015 
Change 

2013-2014 
Change 

The  2015  decrease  in  contract  and  other  revenues,  as  compared  with  2014,  was  primarily  due  to  reduced  activity  under  our 

existing NIAID contracts and decreased reimbursements from Servier under our collaboration agreement.  

The 2014 decrease in contract and other revenues, as compared with 2013, was primarily due to a decrease of $6.3 million in 
reimbursements  from  Servier  under  our  collaboration  agreement  due  to  meeting  the  initial  $50.0  million  cap  of  fully  reimbursable 
NIU costs in third quarter of 2013. Also contributing to the decrease were a decrease of $3.9 million for the partial funding of fixed 
dose combination of perindopril arginine and amlodipine besylate (“FDC1”) Phase 3 trial received  from Servier in 2013 for  which 
there  was  no  equivalent  payment  received  in  2014,  a decrease  of  $0.8  million  received  from  ACEON  sales  and  a  decrease  of  $0.7 
million in manufacturing activities for Allergan. The decreases in contract and other revenue were partially offset by a $0.5 million 
increase in NIAID related revenue. 

We expect total revenue to decrease in 2016 compared to 2015 levels based on anticipated licensing activities, the termination of 

our collaboration with Servier, and the expected novation of our NIAID contract to Nanotherapeutics. 

Research and Development Expenses 

Research  and  development  expenses  were  $70.9  million  in  2015,  compared  with  $80.7  million  in  2014  and  $74.9 million  in 
2013. The decrease of $9.8 million in 2015, as compared with 2014, was primarily due to a decrease of $3.1 million in salaries and 
related expenses, a decrease of $3.5 million in internal and external manufacturing costs, a decrease of $1.9 million in clinical trial 
costs related to spending on our erosive osteoarthritis of the hand (“EOA”) studies in 2014, and a decrease of $1.1 million in research 
and development materials costs.  The increase of $5.8 million in 2014, as compared with 2013, was primarily due to an increase of 
$4.9 million in clinical trial-related costs, an increase of $4.8 million in salaries and related personnel costs and an increase of $2.2 
million in outside consulting services, partially offset by a $5.9 million decrease in external manufacturing activities.  

42 

  
  
 
     
   
 
  
 
   
   
     
   
 
  
 
 
Salaries  and  related  personnel  costs  are  a  significant  component  of  research  and  development  expenses.  We  recorded  $28.7 
million in research and development salaries and employee-related expenses in 2015, compared with $31.8 million in 2014 and $27.0 
million in 2013. Included in these expenses for 2015 were $21.8 million for salaries and benefits, $1.9 million for bonus expense and 
$5.0  million  for  stock-based  compensation,  which  is  a  non-cash  expense.  The  decrease  of  $3.1  million  in  2015,  as  compared  with 
2014,  was  primarily  due  to  a  decrease  of  $2.6  million  in  salaries  and  benefits  and  a  decrease  of  $0.5  million  in  stock-based 
compensation.  The  decrease  in  stock-based  compensation  in  2015,  included  $0.8  million  related  to  the  reversal  of  expense  for 
forfeitures of stock awards related to our restructuring activities in the second half of 2015. 

We recorded $31.8 million in research and development salaries and employee-related expenses in 2014, compared with $27.0 
million in 2013. Included in these expenses for 2014 were $23.4 million for salaries and benefits, $2.8 million for bonus expense and 
$5.6  million  for  stock-based  compensation.  The  increase  of  $4.8  million  in  2014,  as  compared  with  2013,  was  primarily  due  to  an 
increase  of  $1.6  million  in  salaries  and  benefits  resulting  from  increased  headcount  and  an  increase  of  $3.2  million  in  stock-based 
compensation, which is a non-cash expense. 

Our  research  and  development  activities  can  be  divided  into  earlier-stage  programs  and  later-stage  programs.  Earlier-stage 
programs include molecular biology, process development, pilot-scale production and preclinical testing. Later-stage programs include 
clinical  testing,  regulatory  affairs  and  manufacturing  clinical  supplies.  The  costs  associated  with  these  programs  are  summarized 
below (in thousands): 

Earlier stage programs .............................................................   $
Later stage programs ...............................................................  
Total .........................................................................................   $

39,495   $
31,357    
70,852   $

28,327     $ 
52,421       
80,748     $ 

40,840 
34,011 
74,851  

Year Ended December 31, 
2014 

2015 

2013 

Our research and development activities also can be divided into those related to our internal projects and those projects related 
to collaborative and contract arrangements. The costs related to internal projects versus collaborative and contract arrangements are 
summarized (in thousands): 

Internal projects .......................................................................   $
Collaborative and contract arrangements.................................  
Total .........................................................................................   $

50,206   $
20,646    
70,852   $

51,281     $ 
29,467       
80,748     $ 

47,489 
27,362 
74,851  

Year Ended December 31, 
2014 

2015 

2013 

In 2015, the gevokizumab program, for which we incurred the largest amount of expense, accounted for more than 40% but less 
than 50% of our total research and development expenses. A second development program, XMet, accounted for more than 30% but 
less than 40% of our total research and development expenses. All remaining development programs accounted for less than 10% of 
our total research and development. 

In 2014, the gevokizumab program, for which we incurred the largest amount of expense, accounted for more than 40% but less 
than 50% of our total research and development expenses. A second development program, XMet, accounted for more than 10% but 
less  than  20%  of  our  total  research  and  development  expenses  and  a  third  development  program,  NIAID,  accounted  for  more  than 
10% but less than 20% of our total research and development expenses. 

In 2013, the gevokizumab program, for which we incurred the largest amount of expense, accounted for more than 40% but less 
than 50% of our total research and development expenses. XMet, accounted for more than 20% but less than 30% of our total research 
and development expenses. NIAID accounted for more than 10% but less than 20% of our total research and development expenses. 

We  expect  our  research  and  development  spending  in  2016  will  be  reduced  as  compared  with  2015  levels  due  to  our  2015 

restructuring efforts, our strategic focus on our endocrine portfolio, and reduced spending on gevokizumab. 

Future research and development spending also may be impacted by potential new licensing or collaboration arrangements, as 
well as the termination of existing agreements. Beyond this, the scope and magnitude of future research and development expenses are 
difficult to predict at this time. 

43 

  
   
 
 
  
 
  
    
 
  
  
  
 
 
  
 
  
    
 
  
Selling, General and Administrative Expenses 

Selling, general and administrative expenses include salaries and related personnel costs, facilities cost and professional fees. In 
2015, selling, general and administrative expenses were $20.6 million compared with $19.9 million in 2014 and $18.5 million in 2013. 
The  increase  of  $0.7  million  in  2015  as  compared  with  2014  was  primarily  due  to  a  $1.5  million  increase  in  consulting  services, 
primarily related to our out-licensing activities and a $1.0 million increase in legal fees, partially offset by a $0.5 million decrease in 
stock-based  compensation,  which  is  a  non-cash  expense  and  a  $2.0  million  decrease  in  salaries  and  related  personnel  costs.  The 
decrease in stock-based compensation for the year ended December 31, 2015 included $0.7 million related to the reversal of expense 
for forfeitures of stock awards related to our restructuring activities in the second half of 2015.  

The increase in selling, general and administrative expenses in 2014, as compared with 2013 was primarily due to a $3.6 million 
increase in salaries and related personnel costs, primarily reflecting an increase of $2.5 million in stock-based compensation, partially 
offset by a $1.7 million decrease in professional service costs. 

We  expect  selling,  general  and  administrative  expenses  in  2016  to  be  reduced  as  compared  to  2015  levels  due  to  our  2015 

restructuring efforts.  

Restructuring and Other Charges 

On July 22, 2015, we announced the Phase 3 EYEGUARD-B study of gevokizumab in patients with Behçet’s disease uveitis, 
run  by  Servier, did  not  meet  the  primary  endpoint  of  time  to  first  acute  ocular  exacerbation.  In  August  2015,  we  announced  our 
intention to end the EYEGUARD  global Phase 3 program.  On  August 21, 2015, in connection  with our efforts to lower operating 
expenses and preserve capital while continuing to focus on our endocrine product pipeline, we implemented a restructuring plan (the 
“2015 Restructuring”) that included a workforce reduction resulting in the termination of 38 employees and the elimination of 20 open 
positions. On September 29, 2015, we terminated an additional five employees and on October 20, 2015, we terminated an additional 
nine employees.   

During the year ended December 31, 2015, we recorded charges of $2.9 million related to severance, other termination benefits 
and outplacement services. In addition, we recognized an additional restructuring charge of $0.8 million in contract termination costs 
in  the  year  ended  December  31,  2015,  which  primarily  include  costs  in  connection  with  the  discontinuation  of  the  EYEGUARD 
studies.  

In 2014 and 2013, we recorded restructuring charges of $0.1 million and $0.3 million, respectively, for facility costs related to 

restructuring activities initiated in 2012. 

Other Income (Expense), Net 

Interest Expense 

Amortization of debt issuance costs and discounts are included in interest expense. Interest expense is shown below for the years 

ended December 31, 2015, 2014, and 2013 (in thousands): 

Year Ended December 31, 
2014 

2015 

2013 

2014-2015 
Change 

2013-2014 
Change 

Hercules loan ........................................................................   $
Servier loan ...........................................................................  
GECC term loan ....................................................................  
Novartis note .........................................................................  
Other .....................................................................................  
Total interest expense ............................................................   $

2,223   $
1,083    
548    
329    
11    
4,194   $

—    $
2,330     
1,638     
312     
23     
4,303    $

—     $ 
2,152       
2,064       
362       
53       
4,631     $ 

2,223    $
(1,247)    
(1,090)    
17     
(12)    
(109)   $

— 
178 
(426)
(50)
(30)
(328)

Interest expense related to the Servier loan and GECC term loan decreased by $1.2 million and $1.1 million, respectively, in 
2015, compared with 2014. The decrease was due to the $1.9 million balance of imputed interest remaining at the time the Servier 
loan was amended in January 2015 now being amortized over the extended term of the loan and the extinguishment of the GECC term 
loan in February 2015. This decrease was partially offset by an increase of $2.2 million in interest expense due to our $20.0 million 
term loan with Hercules Technology Growth Capital, Inc. that was entered into in February 2015.  A portion of the proceeds from the 
Hercules  Term  Loan  was  used  to  repay  our  outstanding  loan  with  GECC  and  we  recorded  a  loss  of  $0.4  million  upon  the 
extinguishment of the GECC term loan.  

44 

  
  
 
     
   
 
  
 
   
   
     
   
 
  
 
The decrease in interest expense in 2014 as compared to 2013 was due primarily to a decrease in the principal balance of the 

GECC term loan. 

We expect interest expense during 2016 to decrease as compared with 2015 due to the decrease in the principal balances of  the 

Hercules and Servier loans. 

Other Income (Expense), Net 

The following table shows the activity in other income (expense), net for the years ended December 31, 2015, 2014, and 2013 

(in thousands): 

Year Ended December 31, 
2014 

2013 

2015 

2014-2015 
Change 

2013-2014 
Change 

Other income (expense), net 

Gain on sale of business ...................................................   $
Unrealized foreign exchange gains (losses) ......................    
Realized foreign exchange gain (loss) ..............................    
Gain (loss) on sale of assets ..............................................    
Unrealized loss on foreign exchange options ...................    
Other .................................................................................    
Total other income (expense), net ....................................   $

3,505    $
1,870     
69     
18     
(6)    
44     
5,500    $

—    $
2,447     
—     
—     
(355)    
(31)    
2,061    $

—     $ 
(442 )     
(90 )     
(281 )     
(127 )     
743       
(197 )   $ 

3,505    $
(577)    
69     
18     
349     
75     
3,439    $

— 
2,889 
90 
281 
(228)
(774)
2,258   

The gain on sale of business for the year ended December 31, 2015 is related to the $3.5 million gain recognized from the sale 
of  our  pilot  scale  manufacturing  facility,  including  certain  equipment,  to  Agenus  in  2015.  We  believe  that  the  assets  related  to  the 
manufacturing facility and certain other assets sold to Agenus include all key inputs and processes necessary to generate output from a 
market participant’s perspective. Accordingly, we have determined that such assets qualify as a business. Unrealized foreign exchange 
gains (losses) for the years ended December 31, 2015, 2014, and 2013 are primarily related to the re-measurement of the €15 million 
Servier loan. 

Revaluation of Contingent Warrant Liabilities 

We  have  issued  warrants  that  contain  provisions  that  are  contingent  on  the  occurrence  of  a  change  in  control,  which  could 
conditionally obligate us to repurchase the warrants for cash in an amount equal to their estimated fair value using the Black-Scholes 
Model on the date of such change in control. Due to these provisions, we account for the warrants issued as a liability at estimated fair 
value. In addition, the estimated liability related to the warrants is revalued at each reporting period until the earlier of the exercise of 
the warrants, at which time the liability will be reclassified to stockholders’ equity at its then estimated fair value, or expiration of the 
warrants. 

We  revalued  the  March  2012  warrants  at  December  31,  2015  using  the  Black-Scholes  Model  and  recorded  a  $15.6  million 
reduction in the estimated fair value as a gain on the revaluation of contingent warrant liabilities line of our consolidated statement of 
comprehensive loss for the year ended December 31, 2015. The decrease in the estimated fair value of the warrants is primarily due to 
the decrease in the market price of our common stock at December 31, 2015 as compared to December 31, 2014.  We revalued the 
warrants at December 31, 2014 and recorded a $39.5 million reduction in the estimated fair value in 2014 as a gain on the revaluation 
of contingent warrant liabilities line of our consolidated statement of comprehensive loss for the year ended December 31, 2014. 

45 

 
  
  
  
 
     
   
 
  
 
   
   
     
   
 
   
     
     
       
     
 
 
We revalued the December 2014 warrants at December 31, 2015 using the Black-Scholes Model and recorded a $2.2 million 
reduction in the estimated fair value as a gain on the revaluation of contingent warrant liabilities line of our consolidated statement of 
comprehensive loss for the year ended December 31, 2015. The decrease in the estimated fair value of the warrants is primarily due to 
the decrease in the market price of our common stock at December 31, 2015 as compared to December 31, 2014. We revalued the 
warrants at December 31, 2014 and recorded a $5.1 million reduction in the estimated fair value in 2014 as a gain on the revaluation 
of contingent warrant liabilities line of our consolidated statement of comprehensive loss for the year ended December 31, 2014. 

The activity during the year ended December 31, 2014 also included the change in estimated fair value for the February 2010 
warrants that expired in February 2015. We revalued the warrants at December 31, 2014 using the Black-Scholes Model and recorded 
a  $1.0  million  reduction  in  the  estimated  fair  value  as  a  gain  on  the  revaluation  of  contingent  warrant  liabilities  line  of  our 
consolidated statement of comprehensive loss for the year ended December 31, 2014. 

Liquidity and Capital Resources 

The following table summarizes our cash, cash equivalents and marketable securities, our working capital and our cash flow 

activities for each of the periods presented (in thousands): 

Cash and cash equivalents ........................................................  $
Marketable securities ................................................................  $
Working capital ........................................................................  $

65,767   $
496   $
48,924   $

78,445     $ 
—     $ 
47,367     $ 

(12,678)
496 
1,557  

December 31, 

2015 

2014 

Change 

Net cash used in operating activities ......................................   $
Net cash provided by investing activities ...............................    
Net cash provided by financing activities ..............................    
Effect of exchange rate changes on cash ................................    
Net (decrease) increase in cash and cash equivalents ............   $

Year Ended December 31, 
2014 
(78,282)   $
19,675     
35,560     
(167)    
(23,214)   $

2015 
(30,892)   $
4,450     
13,801     
(37)    
(12,678)   $

2013 
(45,915 )   $ 
18,840       
83,389       
—       
56,314     $ 

2014-2015 
Change 

2013-2014 
Change 

47,390    $
(15,225)    
(21,759)    
130     
10,536    $

(32,367)
835 
(47,829)
(167)
(79,528)

Cash Used in Operating Activities 

The decrease in net cash used in operating activities in 2015 as compared to 2014 was due to increased licensing fee revenue, 
including  the  $37.0  million  upfront  fee  from  Novartis,  combined  with  decreased  R&D  spending  related  to  internal  and  external 
manufacturing  costs  and  a  decrease  in  clinical  trial  costs  primarily  resulting  from  the  completion  in  2014  of  our  Phase  2  study  in 
EOA.   

The increase in net cash used in operating activities in 2014 as compared to 2013 was primarily due to an increase in research 
and  development  spending  primarily  related  to  gevokizumab  clinical  development  programs  and  an  increase  in  salaries  and  related 
personnel expenses primarily related to an increase in headcount. 

Cash Used in Investing Activities 

Net cash provided by investing activities for the year ended December 31, 2015 was primarily related to proceeds from the sale 

of our manufacturing facility of $4.9 million, partially offset by $0.4 million in purchases of property and equipment.  

Net  cash  provided  by  investing  activities  for  the  year  ended  December  31,  2014  was  primarily  due  to  the  $20.0  million  in 

proceeds from maturities of short-term investments, partially offset by $0.3 million in purchases of property and equipment.  

Net  cash  provided  by  investing  activities  for  the  year  ended  December  31,  2013  was  primarily  due  to  the  $40.0  million  in 
proceeds from maturities of short-term investments, partially offset by $20.0 million in purchases of short-term investments and $1.2 
million in purchases of property and equipment.  

46 

  
  
 
       
  
 
  
 
  
    
 
  
  
 
     
   
 
  
 
   
   
     
   
 
  
Cash Provided by Financing Activities 

Net  cash  provided  by  financing  activities  for  the  year  ended  December  31,  2015  was  primarily  related  to  proceeds  from  the 
Hercules  Term  Loan  of  $20.0  million  and  proceeds  from  the  issuance  of  common  stock  of  $0.5  million.  These  cash  inflows  were 
partially offset by $6.1 million of principal payments on the GECC Term Loan, and payment of debt issuance costs of $0.5 million on 
the Hercules Term Loan. 

Net cash provided by financing activities for the year ended December 31, 2014 was primarily related to net proceeds received 
from the issuance of common stock of $37.7 million, net of offering expenses, from the December 2014 registered direct offering, and 
$3.7 million from employee stock purchases. These cash inflows were partially offset by $5.9 million of principal payments on our 
loans with GECC and Novartis.  

Net cash provided by financing activities for the year ended December 31, 2013 was primarily related to net proceeds received 
from the issuance of common stock of $29.4 million from the August 2013 public offering, $53.6 million from the December 2013 
public offering, $2.2 million of net proceeds from the exercise of warrants, and $1.4 million of net proceeds received from employee 
stock purchases. These cash inflows were partially offset by $3.1 million of principal payments on our loan with GECC. 

ATM Agreement 

On November 12, 2015, we entered into an At Market Issuance Sales Agreement (the “2015 ATM Agreement”) with Cowen 
and Company, LLC (“Cowen”), under which we may offer and sell from time to time at our sole discretion shares of our common 
stock  through  Cowen  as  our  sales  agent,  in  an  aggregate  amount  not  to  exceed  the  amount  that  can  be  sold  under  our  registration 
statement  on  Form  S-3  (File  No.  333-201882)  filed  with  the  SEC  on  the  same  date.  Cowen  may  sell  the  shares  by  any  method 
permitted by law deemed to be an “at the market” offering as defined in Rule 415 of the Securities Act, including without limitation 
sales  made  directly  on  The  Nasdaq  Global  Market,  on  any  other  existing  trading  market  for  our  common  stock  or  to  or  through  a 
market maker. Cowen also may sell the shares in privately negotiated transactions, subject to our prior approval. We will pay Cowen a 
commission  equal  to  3%  of  the  gross  proceeds  of  the  sales  price  of  all  shares  sold  through  it  as  sales  agent  under  the  2015  ATM 
Agreement. For the year ended December 31, 2015, no shares of common stock have been sold under this agreement.  

Hercules Term Loan 

The Company and Hercules Technology Growth Capital, Inc. entered into the Hercules Term Loan on February 27, 2015 (the 
“Closing Date”), under which we borrowed $20.0 million. The Hercules Term Loan has a variable interest rate that is the greater of 
either  (i)  9.40%  plus  the  prime  rate  as  reported  from  time  to  time  in  The  Wall  Street  Journal  minus  7.25%,  or  (ii)  9.40%.  The 
payments  under  the  Hercules  Term  Loan  are  interest  only  until  one  month  prior  to  July  1,  2016.  The  interest-only  period  will  be 
followed by equal  monthly payments of principal and interest amortized over a 30-month  schedule  through the  scheduled  maturity 
date of September 1, 2018. As security for its obligations under the Hercules Term Loan, we granted a security interest in substantially 
all of our existing and after-acquired assets, excluding our intellectual property assets. We used a portion of the proceeds under the 
Hercules Term Loan to repay the outstanding principle balance, final payment fee, prepayment fee, and accrued interest totaling $5.5 
million from GECC. 

If we prepay the loan prior to the loan maturity date, we will pay Hercules a prepayment charge, based on a prepayment fee 
equal to 3.00% of the amount prepaid, if the prepayment occurs in any of the first 12 months following the Closing Date, 2.00% of the 
amount prepaid, if the prepayment occurs after 12 months from the Closing Date but prior to 24 months from the closing date, and 
1.00%  of  the  amount  prepaid  if  the  prepayment  occurs  after  24  months  from  the  Closing  Date.  The  Hercules  Term  Loan  includes 
customary affirmative and restrictive covenants, but does not include any financial maintenance covenants, and also includes standard 
events of default, including payment defaults. Upon the occurrence of an event of default, a default interest rate of an additional 5% 
may be applied to the outstanding loan balances, and Hercules may declare all outstanding obligations immediately due and payable 
and take such other actions as set forth in the Hercules Term Loan. 

We incurred debt issuance costs of $0.5 million in connection with the Hercules Term Loan. We will be required to pay a final 
payment fee equal to $1.2 million on the maturity date, or such earlier date as the term loan is paid in full. The debt issuance costs and 
final payment fee are being amortized and accreted, respectively, to interest expense over the term of the term loan using the effective 
interest method.  

47 

In  connection  with  the  Hercules  Term  Loan,  we  issued  unregistered  warrants  that  entitle  Hercules  to  purchase  up  to  an 
aggregate of 181,268 unregistered shares of XOMA common stock at an exercise price equal to $3.31 per share. These warrants were 
exercisable immediately and have a five-year term expiring in February 2020. We allocated the aggregate proceeds of the Hercules 
Term Loan between the warrants and the debt obligation.  The estimated fair value of the warrants issued to Hercules of $0.5 million 
was determined using the Black-Scholes Model and was recorded as a discount to the debt obligation. The discount is being amortized 
over the term of the loan using the effective interest method. The warrants are classified in stockholders’ equity on the consolidated 
balance sheet. At December 31, 2015, the net carrying value of the Hercules Term Loan was $19.7 million. 

Servier Loan 

In  December  2010,  we  entered  into  a  loan  agreement  with  Servier  (the  “Servier  Loan  Agreement”),  which  provided  for  an 
advance  of  up  to  €15.0  million.  The  loan  was  fully  funded  in  January  2011,  with  the  proceeds  converting  to  approximately  $19.5 
million at the exchange rate on the date of funding. The loan is secured by an interest in XOMA’s intellectual property rights to all 
gevokizumab indications worldwide, excluding certain rights in the U.S. and Japan. Interest is calculated at a floating rate based on a 
Euro Inter-Bank Offered Rate (“EURIBOR”) and is subject to a cap. The interest rate is reset semi-annually in January and July of 
each  year.  The  interest  rate  for  the  initial  interest  period  was  3.22%  and  was  reset  semi-annually  ranging  from  2.05%  to  3.83%. 
Interest for the six-month period from mid-January 2015 through mid-July 2015 was reset to 2.16%. Interest for the six-month period 
from mid-July 2015 through mid-January 2016 was reset to 2.05%. In January 2015 and July 2015, the Company made payments of 
$0.2  million  in  accrued  interest  to  Servier.  Interest  is  payable  semi-annually;  however,  the  Servier  Loan  Agreement  provides  for  a 
deferral of interest payments over a period specified in the agreement. During the deferral period, accrued interest will be added to the 
outstanding  principal  amount  for  the  purpose  of  interest  calculation  for  the  next  six-month  interest  period.  On  the  repayment 
commencement date, all unpaid and accrued interest shall be paid to Servier, and thereafter, all accrued and unpaid interest shall be 
due  and  payable  at  the  end  of  each  six-month  period.  The  loan  would  have  matured  in  2016.  In  addition,  the  loan  becomes 
immediately due and payable upon certain customary events of default. On January 9, 2015, Servier and we entered into Amendment 
No. 2 (“Loan Amendment”) which extended the maturity date of the loan from January 13, 2016 to three tranches of principal to be 
repaid  as  follows:  €3.0  million  on  January  15,  2016,  €5.0 million  on  January  15,  2017,  and  €7.0  million  on  January  15,  2018.  On 
September  28,  2015,  Servier  notified  us  of  its  intention  to  terminate  the  Collaboration  Agreement,  as  amended  and  return  the 
gevokizumab rights to XOMA. The termination will be effective on March 25, 2016 and does not result in a change to the maturity 
date of our loan with Servier. At December 31, 2015, the outstanding principal balance under this loan was $16.4 million using the 
December 31, 2015 Euro to U.S. Dollar exchange rate of 1.091. 

*        *        * 

We  have  incurred  operating  losses  since  inception  and  have  an  accumulated  deficit  of  $1.1  billion  at  December 31, 
2015.   Management  expects  operating  losses  and  negative  cash  flows  to  continue  for  the  foreseeable  future.    As  of  December 31, 
2015, we had $66.3 million in cash, cash equivalents and marketable securities, which is available to fund future operations. Taking 
into  account  the  repayment  of  our  outstanding  debt  classified  within  current  liabilities  on  our  Consolidated  Balance  Sheet  as  of 
December 31, 2015, we anticipate that we have adequate resources to fund operations through at least December 31, 2016.  

Our ability to raise additional capital in the equity and debt markets, should we choose to do so, is dependent on a number of 
factors, including, but not limited to, the market demand for our common stock, which itself is subject to a number of pharmaceutical 
development and business risks and uncertainties, as well as the uncertainty that we would be able to raise such additional capital at a 
price or on terms that are favorable to us. 

48 

Commitments and Contingencies 

Schedule of Contractual Obligations 

Payments by period due under contractual obligations at December 31, 2015, are as follows (in thousands): 

Contractual Obligations 
Operating leases(1) ........................................................   $
Capital lease(1) ..............................................................    
Debt obligations(2) ........................................................    
Principal and final payment fee ..............................    
Interest ....................................................................    
Total ..................................................................   $

Total 
26,015    $
319     

Less than 
1 year

    1 to 3 years       3 to 5 years     

More than
5 years

3,631    $
131     

7,574     $
188       

8,016     $
—      

6,794 
— 

51,192     
6,066     
83,592    $

6,892     
2,147     
12,801    $

30,617       
1,938       
40,317     $

13,683      
1,981      
23,680     $

— 
— 
6,794  

(1) 
 See Note 13: Commitment and Contingencies to the accompanying consolidated financial statements for further discussion. 
(2)  See Item 7A: Quantitative and Qualitative Disclosures about Market Risk and Note 8: Long-Term Debt and Other Financings to 
the  accompanying  consolidated  financial  statements  for  further  discussion  of  our  debt  obligation.  Refer  to  Management’s 
Discussion and Analysis of Financial Condition and Results of Operations for further information regarding the Hercules Loan 
Agreement. 

We lease administrative and research facilities and office equipment under operating leases expiring on various dates through 
April 2023. These leases require us to pay taxes, insurance, maintenance and minimum lease payments. In addition to the above, we 
have committed to make potential future milestone payments to third parties as part of licensing and development programs. Payments 
under  these  agreements  become  due  and  payable  only  upon  the  achievement  by  us  of  certain  developmental,  regulatory  and/or 
commercial milestones. Because it is uncertain if and when these milestones will be achieved, such contingencies, aggregating up to 
$57.7 million (assuming one product per contract meets all milestones) have not been recorded on our consolidated balance sheet as of 
December 31, 2015. We are also obligated to pay royalties, ranging generally from 0.5% to 3.5% of the selling price of the licensed 
component  and  up  to  40%  of  any  sublicense  fees  to  various  universities  and  other  research  institutions  based  on  future  sales  or 
licensing of products that incorporate certain products and technologies developed by those institutions. We are unable to determine 
precisely when and if our payment obligations under the agreements will become due as these obligations are based on future events, 
the achievement of which is subject to a significant number of risks and uncertainties. 

Although  operations  are  influenced  by  general  economic  conditions,  we  do  not  believe  inflation  had  a  material  impact  on 
financial  results  for  the  periods  presented.  We  believe  that  we  are  not  dependent  on  materials  or  other  resources  that  would  be 
significantly impacted by inflation or changing economic conditions in the foreseeable future. 

Recent Accounting Pronouncements 

In  May  2014,  the  Financial  Accounting  Standards  Board  (“FASB”)  issued  guidance  codified  in  Accounting  Standards 
Codification (“ASC”) 606, Revenue Recognition — Revenue from Contracts with Customers, which amends the guidance in ASC 605, 
Revenue  Recognition.  The  standard’s  core  principle  is  that  a  company  will  recognize  revenue  when  it  transfers  promised  goods  or 
services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those 
goods or services. In August 2015, the FASB issued an accounting update to defer the effective date by one year for public entities 
such  that  it  is  now  applicable  for  annual  and  interim  periods  beginning  after  December  15,  2017.  Early  adoption  is  permitted  for 
periods  beginning  after  December  15,  2016.  Entities  would  have  the  option  of  using  either  a  full  retrospective  or  a  modified 
retrospective  approach  to  adopt  this  new  guidance.  We  are  currently  evaluating  the  impact  of  the  adoption  of  this  standard  on  our 
consolidated financial statements. 

In August 2014, the FASB issued Accounting Standards Update (“ASU”) No. 2014-15, Disclosure of Uncertainties about an 
Entity’s Ability to Continue as a Going Concern (“ASU 2014-15”). This ASU introduces an explicit requirement for management to 
assess if there is substantial doubt about an entity’s ability to continue as a going concern, and to provide related footnote disclosures 
in  certain  circumstances.  In  connection  with  each  annual  and  interim  period,  management  must  assess  if  there  is  substantial  doubt 
about an entity’s ability to continue as a going concern within one year after the issuance date. Disclosures are required if conditions 
give rise to substantial doubt. ASU 2014-15 is effective for all entities in the first annual period ending after December 15, 2016. The 
adoption of this guidance is not expected to have any impact on our financial position and results of operations.  

49 

 
 
   
 
     
     
       
      
 
 
 
In April 2015, the FASB issued ASU 2015-03, Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation 
of Debt Issuance Costs (“ASU 2015-03”), which 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.  We  early 
adopted ASU 2015-03 as of January 1, 2015, as permitted. There is no impact of early adoption of ASU 2015-03 on the consolidated 
statements of comprehensive loss. 

In  November  2015,  the  FASB  issued  ASU  2015-17, Balance  Sheet  Classification  of  Deferred  Taxes,  which  simplifies  the 
presentation  of  deferred  income  taxes.    This  ASU  amends  the  existing  guidance  to  require  presentation  of  deferred  tax  assets  and 
liabilities as noncurrent within a classified statement of financial position. We early adopted ASU 2015-17 effective December 2015 
on a prospective basis. The adoption did not have an impact on our consolidated financial statements. 

In  January  2016,  the  FASB  issued  ASU  2016-01,  Financial  Instruments—Overall  (Subtopic  825-10):  Recognition  and 
Measurement of Financial Assets and Financial Liabilities, related to accounting for equity investments, financial liabilities under the 
fair  value  option,  and  the  presentation  and  disclosure  requirements  for  financial  instruments.  In  addition,  the  FASB  clarified  the 
guidance  related  to  the  valuation  allowance  assessment  when  recognizing  deferred  tax  assets  resulting  from  unrealized  losses  on 
available-for-sale debt securities. The guidance will become effective for us beginning in the first quarter of 2018. Early adoption is 
permitted. We are evaluating the impact of the adoption of this accounting guidance on our consolidated financial statements. 

In  February  2016,  the  FASB  issued  ASU  2016-02,  Leases  (Topic  842)  which  supersedes  Topic  840,  Leases.  From  a  lessee 
accounting perspective, the core principle of Topic 842 is that a lessee should recognize the assets and liabilities that arise from leases. 
A lessee should recognize in the statement of financial position a liability to make lease payments (the lease liability) and a right-of-
use  asset  representing  its  right  to  use  the  underlying  asset  for  the  lease  term.  When  measuring  assets  and  liabilities  arising  from  a 
lease, a lessee (and a lessor) should include payments to be made in optional periods only if the lessee is reasonably certain to exercise 
an  option  to  extend  the  lease  or  not  to  exercise  an  option  to  terminate  the  lease.  Similarly,  optional  payments  to  purchase  the 
underlying asset should be included in the measurement of lease assets and lease liabilities only if the lessee is reasonably certain to 
exercise that purchase option. Reasonably certain is a high threshold that is consistent with and intended to be applied in the same way 
as  the  reasonably  assured  threshold  under  Topic  840.  In  addition,  also  consistent  with  Topic  840,  a  lessee  (and  a  lessor)  should 
exclude most variable lease payments in measuring lease assets and lease liabilities, other than those that depend on an index or a rate 
or are in substance fixed payments. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy 
election  by  class  of  underlying  asset  not  to  recognize  lease  assets  and  lease  liabilities.  If  a  lessee  makes  this  election,  it  should 
recognize lease expense for such leases generally on a straight-line basis over the lease term. Under Topic 842, there continues to be a 
differentiation between finance leases (which replaces capital leases) and operating leases. However, the principal difference from the 
previous guidance is that the lease assets and lease liabilities arising from operating leases should be recognized in the statement of 
financial  position.  The  accounting  applied  by  a  lessor  is  largely  unchanged  from  that  applied  under  Topic  840.  The  guidance  will 
become  effective  for  us  beginning  in  the  first  quarter  of  2019.  Early  adoption  is  permitted.  In  transition,  lessees  and  lessors  are 
required to recognize and  measure leases at the beginning  of the earliest period presented using a  modified retrospective approach. 
The modified retrospective approach includes a number of optional practical expedients primarily focused on leases that commenced 
before  the  effective  date  of  Topic  842,  including  continuing  to  account  for  leases  that  commence  before  the  effective  date  in 
accordance with previous guidance, unless the lease is modified. We are evaluating the impact of the adoption of the standard on our 
consolidated financial statements. 

Off Balance Sheet Arrangements 

We do not have any off balance sheet arrangements, as defined in Item 303(a)(4)(ii) of Regulation S-K promulgated by the SEC. 

Item 7A.  Quantitative and Qualitative Disclosures about Market Risk 

Interest Rate Risk 

Our exposure to market rate risk for changes in interest rates relates primarily to our investment portfolio and our loan facilities. 
By policy, we make our investments in high-quality debt securities, limit the amount of credit exposure to any one non-U.S. Treasury 
issuer,  and  limit  duration  by  restricting  the  term  of  the  instrument.  We  generally  hold  investments  to  maturity,  with  a  weighted 
average portfolio period of less than twelve months. However, if the need arose to liquidate such securities before maturity, we may 
experience losses on liquidation. 

We hold interest-bearing instruments that are classified as cash and cash equivalents. Fluctuations in interest rates can affect the 
principal values and yields of fixed income investments. If interest rates in the general economy were to rise rapidly in a short period 
of  time,  our  fixed  income  investments  could  lose  value.  As  of  December  31,  2015,  our  marketable  securities  of  $0.5  million  were 
comprised of equity held in a publicly traded company. We do not believe that a change in the market rates of interest would have any 
significant impact on the realizable value of our investment portfolio. 

50 

 
 
The  following  table  presents  the  amounts  and  related  weighted  average  interest  rates  of  our  cash  and  cash  equivalents  at 

December 31, 2015 and 2014 (in thousands, except interest rate): 

Carrying 
Amount 
(in 
thousands)

Fair Value 
(in 
thousands)     

Weighted 
Average 
Interest Rate   

Maturity 

December 31, 2015 

Cash and cash equivalents ................................................   Daily to 90 days  $

65,767     $ 

65,767      

0.05%

December 31, 2014 

Cash and cash equivalents ................................................   Daily to 90 days  $

78,445     $ 

78,445      

0.07%

As of December 31, 2015, we have an outstanding principal balance on our note with Novartis of $13.7 million, which is due in 
2020. The interest rate on this note is charged at a rate of USD six-month London Interbank Offered Rate (“LIBOR”) plus 2%, which 
was 2.81% at December 31, 2015. No further borrowing is available under this note. 

As of December 31, 2015, we have an outstanding principal balance on our loan with Servier of €15.0 million, which converts 
to approximately $16.4 million at December 31, 2015. The interest rate on this loan is charged at a floating rate based on a Euro Inter-
Bank Offered Rate (“EURIBOR”) and subject to a cap. The interest rate for the initial interest period was 3.22% and was reset semi-
annually ranging from 2.05% to 3.83%. Interest for the six-month period from mid-January 2015 through mid-July 2015 was reset to 
2.16%. Interest for the six-month period from mid-July 2015 through mid-January 2016 was reset to 2.05%. No further borrowing is 
available under this loan. 

As of December 31, 2015, we have an outstanding principal balance on our loan with Hercules of $20.0 million. The interest 
rate on this loan is the greater of either (i) 9.40% plus the prime rate as reported from time to time in The Wall Street Journal minus 
7.25%, or (ii) 9.40%. 

The variable interest rate related to our long-term debt instruments is based on LIBOR for our Novartis note, EURIBOR for our 
Servier  loan  and  the  prime  rate  for  the  Hercules  loan.  We  estimate  a  hypothetical  100  basis  point  change  in  interest  rates  could 
increase or decrease our interest expense by approximately $0.3 million on an annualized basis.  

Foreign Currency Risk 

We  have  debt,  incur  expenses,  and  may  be  owed  milestones  denominated  in  foreign  currencies.  The  amount  of  debt  owed, 
expenses  incurred,  or  milestones  owed  to  us  will  be  impacted  by  fluctuations  in  these  foreign  currencies.  When  the  U.S.  Dollar 
weakens  against  foreign  currencies,  the  U.S.  Dollar  value  of  the  foreign-currency  denominated  debt,  expense,  and  milestones 
increases, and when the U.S. Dollar strengthens against these currencies, the U.S. dollar value of the foreign-currency denominated 
debt, expense, and milestones decreases. Consequently, changes in exchange rates will affect the amount we are required to repay on 
our €15.0 million loan from Servier and may affect our results of operations. We estimate that a hypothetical 0.01 change in the Euro 
to USD exchange rate could increase or decrease our unrealized gains or losses by approximately $0.2 million. 

Our loan from Servier was fully funded in January 2011, with the proceeds converting to approximately $19.5 million using the 
January  13,  2011  Euro-to-U.S.-Dollar  exchange  rate  of  1.3020.    At  December  31,  2015,  the  €15.0  million  outstanding  principal 
balance under the Servier Loan Agreement equaled approximately $16.4 million using the December 31, 2015 Euro-to-USD exchange 
rate of 1.091. In May 2011, in order to manage our foreign currency exposure relating to our principal and interest payments on our 
loan from Servier, we entered into two foreign exchange option contracts to buy €1.5 million and €15.0 million in January 2014 and 
January 2016, respectively. Upfront premiums paid on these foreign exchange option contracts totaled $1.5 million. As of December 
31, 2015, one option contract had expired. The remaining foreign exchange option contract had a fair value of zero at December 31, 
2015  and  expired  in  January  2016.  Our  use  of  derivative  financial  instruments  represents  risk  management;  we  do  not  enter  into 
derivative financial contracts for trading purposes. 

51 

  
  
 
 
    
 
  
   
       
      
  
  
 
  
   
       
      
  
 
  
   
       
      
  
  
 
 
Item 8. 

Financial Statements and Supplementary Data 

The  following  consolidated  financial  statements  of  the  registrant,  related  notes  and  report  of  independent  registered  public 

accounting firm are set forth beginning on page F-1 of this report. 

Report of Independent Registered Public Accounting Firm ...........................................................................................................  
Consolidated Balance Sheets ..........................................................................................................................................................  
Consolidated Statements of Comprehensive Loss ..........................................................................................................................  
Consolidated Statements of Stockholders' (Deficit) Equity ............................................................................................................  
Consolidated Statements of Cash Flows .........................................................................................................................................  
Notes to the Consolidated Financial Statements .............................................................................................................................  

F-2
F-3
F-4
F-5
F-6
F-7

Item 9. 

Changes in and Disagreements with Accountants on Accounting and Financial Disclosure 

Not applicable. 

Item 9A.  Controls and Procedures 

Under  the  supervision  and  with  the  participation  of  our  management,  including  our  Chief  Executive  Officer  and  our  Vice 
President, Finance, and Chief Financial Officer, we conducted an evaluation of our disclosure controls and procedures, as such term is 
defined  under  Rule  13a-15the  promulgated  under  the  Securities  Exchange  Act  of  1934,  as  amended,  as  of  the  end  of  the  period 
covered by this report. Our disclosure controls and procedures are intended to ensure that the information we are required to disclose 
in the reports that we file or submit under the Securities Exchange Act of 1934 is (i) recorded, processed, summarized and reported 
within  the  time  periods  specified  in  the  Securities  and  Exchange  Commission’s  rules  and  forms  and  (ii)  accumulated  and 
communicated to our management, including the Chief Executive Officer and Vice President, Finance and Chief Financial Officer, as 
the  principal  executive  and  financial  officers,  respectively,  to  allow  timely  decisions  regarding  required  disclosures.  Based  on  this 
evaluation,  our  Chief  Executive  Officer  and  our  Vice  President,  Finance  and  Chief  Financial  Officer  concluded  that  our  disclosure 
controls and procedures were effective as of the end of the period covered by this report. 

Management’s Report on Internal Control over Financial Reporting 

Management, including our Chief Executive Officer and our Vice President, Finance and Chief Financial Officer, is responsible 
for  establishing  and  maintaining  adequate  internal  control  over  financial  reporting  (as  such  term  is  defined  in  Exchange  Act  Rules 
13a-159f). The Company’s internal control system was designed to provide reasonable assurance to the Company’s management and 
board  of  directors  regarding  the  preparation  and  fair  presentation  of  published  financial  statements  in  accordance  with  accounting 
principles generally accepted in the United States. 

Management assessed the effectiveness of our internal control over financial reporting as of December 31, 2015. In making this 
assessment,  management  used  the  criteria  set  forth  by  the  Committee  of  Sponsoring  Organizations  of  the  Treadway  Commission 
(“COSO”) in Internal Control—Integrated Framework (2013 Framework). Based on our assessment we believe that, as of December 
31, 2015, our internal control over financial reporting is effective based on those criteria. 

The Company’s internal control over financial reporting as of December 31, 2015, has been audited by Ernst & Young, LLP, 
independent registered public accounting firm who also audited the Company’s consolidated financial statements. Ernst & Young’s 
report on the Company’s internal control over financial reporting follows. 

Changes in Internal Control over Financial Reporting 

There were no changes in our internal control over financial reporting identified in connection with the evaluation required by 
paragraph (d) of Exchange Act Rules 13a-15 or 15d-15 that occurred during our last fiscal quarter that have materially affected, or are 
reasonably likely to materially affect, our internal control over financial reporting. 

Item 9B.  Other Information 

None. 

52 

  
 
 
 
 
 
 
 
 
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 

The Board of Directors and Stockholders of XOMA Corporation 

We have audited XOMA Corporation’s internal control over financial reporting as of December 31, 2015, 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). XOMA Corporation’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 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, XOMA Corporation maintained, in all material respects, effective internal control over financial reporting as of 

December 31, 2015, 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 XOMA Corporation as December 31, 2015 and 2014, and the related consolidated statements of 
comprehensive loss, stockholders’ (deficit) equity, and cash flows for each of the three years in the period ended December 31, 2015, 
of XOMA Corporation and our report dated March 9, 2016 expressed an unqualified opinion thereon. 

/s/ Ernst & Young LLP 

Redwood City, California 
March 9, 2016  

53 

  
PART III 

Item 10.  Directors, Executive Officers, Corporate Governance 

Certain information regarding our executive officers required by this Item is set forth as a Supplementary Item at the end of Part 
I  of  this  Form  10-K  (pursuant  to  Instruction  3  to  Item  401(b)  of  Regulation  S-K).  Other  information  required  by  this  Item  will be 
included in the Company’s proxy statement for the 2016 Annual General Meeting of Stockholders (“2016 Proxy Statement”), under 
the sections labeled “Item 1—Election of Directors” and “Compliance with Section 16(a) of the Securities Exchange Act of 1934”, 
and is incorporated herein by reference.  The 2016 Proxy Statement will be filed with the SEC within 120 days after the end of the 
fiscal year to which this report relates. 

Code of Ethics 

The Company’s Code of Ethics applies to all employees, officers and directors including the Chief Executive Officer (principal 
executive officer) and the Vice President, Finance and Chief Financial Officer (principal financial and principal accounting officer) 
and  is  posted  on  the  Company’s  website  at  www.xoma.com.  We  intend  to  satisfy  the  applicable  disclosure  requirements  regarding 
amendments to, or waivers from, provisions of our Code of Ethics by posting such information on our website. 

Item 11.  Executive Compensation 

Information  required  by  this  Item  will  be  included  in  the  sections  labeled “Compensation  of  Executive  Officers”,  “Summary 
Compensation Table”, “Grants of Plan-Based Awards”, “Outstanding Equity Awards as of December 31, 2015”, “Option Exercises 
and Shares Vested”, “Pension Benefits”, “Non-Qualified Deferred  Compensation” and “Compensation of Directors” appearing  in 
our 2016 Proxy Statement, and is incorporated herein by reference. 

Item 12. 

Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters 

Information required by this Item will be included in the sections labeled “Stock Ownership” and “Equity Compensation Plan 

Information” appearing in our 2016 Proxy Statement, and is incorporated herein by reference. 

Item 13.  Certain Relationships and Related Transactions, and Director Independence 

Information required by this Item will be included in the section labeled “Transactions with Related Persons” appearing in our 

2016 Proxy Statement, and is incorporated herein by reference. 

Item 14.  Principal Accountant Fees and Services 

Information  required  by  this  Item  will  be  included  in  the  section  labeled  “Item  3—Appointment  of  Independent  Registered 

Public Accounting Firm” appearing in our 2016 Proxy Statement, and is incorporated herein by reference. 

54 

 
 
 
 
 
 
 
 
 
 
 
 
PART IV 

Item 15.  Exhibits and Financial Statement Schedules 

(a) The following documents are included as part of this Annual Report on Form 10-K: 

(1) Financial Statements: 

All financial statements of the registrant referred to in Item 8 of this Report on Form 10-K. 

(2) Financial Statement Schedules: 

All  financial  statements  schedules  have  been  omitted  because  the  required  information  is  included  in  the 
consolidated financial statements or the notes thereto or is not applicable or required. 

(3) Exhibits: 

The exhibits listed in the accompanying index to exhibits are filed or incorporated by reference as part of this Annual Report on 

Form 10-K. 

55 

 
 
 
 
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, on this 9th day of March 2016. 

SIGNATURES 

XOMA CORPORATION 

By:  

/s/ JOHN VARIAN 
John Varian 
Chief Executive Officer and Director 

POWER OF ATTORNEY 

KNOW  ALL  PERSONS  BY  THESE  PRESENTS,  that  each  person  whose  signature  appears  below  constitutes  and  appoints 
John  Varian  and  Thomas  Burns,  and  each  of  them,  as  his  or  her  true  and  lawful  attorneys-in-fact  and  agents,  with  full  power  of 
substitution and resubstitution for him or her and in his or her name, place, and stead, in any and all capacities, to sign any and all 
amendments  to  this  Annual  Report  on  Form 10-K,  and  to  file  the  same,  with  exhibits  thereto  and  other  documents  in  connection 
therewith, with the SEC, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform 
each and every act and thing requisite and necessary to be done therewith, as fully to all intents and purposes as he might or could do 
in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, and any of them or their substitute or substitutes, 
may lawfully do or cause to be done by virtue hereof. 

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 and in the capacities and on the dates indicated. 

Signature 

Title 

Date 

/s/ John Varian 

  Chief Executive Officer (Principal Executive Officer) and Director 

  March 9, 2016

(John Varian) 

/s/ Thomas Burns 

  Vice President, Finance and Chief Financial Officer (Principal 

  March 9, 2016

(Thomas Burns) 

Financial and Principal Accounting Officer) 

/s/ Patrick J. Scannon 

(Patrick J. Scannon) 

  Executive Vice President and Chief Scientific 
  Officer and Director 

  March 9, 2016

/s/ W. Denman Van Ness 

  Chairman of the Board of Directors 

  March 9, 2016

(W. Denman Van Ness) 

/s/ William K. Bowes, Jr. 

  Director 

(William K. Bowes, Jr.) 

/s/ Peter Barton Hutt 

(Peter Barton Hutt) 

(Joseph M. Limber) 

  Director 

  Director 

/s/ Timothy P. Walbert 

  Director 

(Timothy P. Walbert) 

/s/ Jack L. Wyszomierski 

  Director 

(Jack L. Wyszomierski) 

56 

  March 9, 2016

  March 9, 2016

  March 9, 2016

  March 9, 2016

  March 9, 2016

  
 
 
  
 
  
  
 
  
     
     
    
    
  
    
    
  
    
  
     
     
    
  
     
     
    
    
  
     
     
    
    
  
     
     
    
    
  
     
     
 
    
    
  
     
     
  
     
     
    
    
  
     
     
    
    
 
 
Index to Consolidated Financial Statements 

Report of Independent Registered Public Accounting Firm .........................................................................................................    
Consolidated Balance Sheets ........................................................................................................................................................    
Consolidated Statements of Comprehensive Loss ........................................................................................................................    
Consolidated Statements of Stockholders' (Deficit) Equity ..........................................................................................................    
Consolidated Statements of Cash Flows .......................................................................................................................................    
Notes to the Consolidated Financial Statements ...........................................................................................................................    

F-2
F-3
F-4
F-5
F-6
F-7

F-1 

 
 
 
 
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 

The Board of Directors and Stockholders of XOMA Corporation 

We have audited the accompanying consolidated balance sheets of XOMA Corporation as of December 31, 2015 and 2014, and 

the related consolidated statements of comprehensive loss, stockholders’ (deficit) equity and cash flows for each of the three years in 
the period ended December 31, 2015. 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 XOMA Corporation at December 31, 2015 and 2014, and the consolidated results of its operations, and its cash flows for 
each of the three years in the period ended December 31, 2015, 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), 

XOMA Corporation’s internal control over financial reporting as of December 31, 2015, 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 March 9, 2016 expressed an unqualified opinion thereon. 

/s/ Ernst & Young LLP 

Redwood City, California 
March 9, 2016  

F-2 

 
 
 
XOMA Corporation 
CONSOLIDATED BALANCE SHEETS 
(in thousands, except share data) 

Current assets: 

ASSETS 

Cash and cash equivalents ...............................................................................................    $
Marketable securities .......................................................................................................     
Trade and other receivables, net ......................................................................................     
Prepaid expenses and other current assets .......................................................................     
Total current assets .....................................................................................................     
Property and equipment, net .................................................................................................     
Other assets ...........................................................................................................................     
Total assets .................................................................................................................    $

LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY 

Current liabilities: 

Accounts payable .............................................................................................................    $
Accrued and other liabilities ............................................................................................     
Deferred revenue – current ..............................................................................................     
Interest bearing obligations – current ..............................................................................     
Accrued interest on interest bearing obligations – current ..............................................     
Total current liabilities ...............................................................................................     
Deferred revenue – non-current  ...........................................................................................     
Interest bearing obligations – non-current ............................................................................     
Contingent warrant liabilities ................................................................................................     
Other liabilities – non-current ...............................................................................................     
Total liabilities ...........................................................................................................     

Commitments and Contingencies (Note 13) 

Stockholders’ (deficit) equity: 

December 31, 

2015 

2014 

65,767      $
496       
4,069       
1,887       
72,219       
1,997       
664       
74,880      $

6,831      $
7,025       
3,198       
5,910       
331       
23,295       
—       
42,757       
10,464       
673       
77,189       

78,445 
— 
3,309 
1,859 
83,613 
5,120 
669 
89,402 

5,990 
9,892 
1,089 
19,018 
257 
36,246 
1,939 
16,290 
31,828 
— 
86,303 

Preferred stock, $0.05 par value, 1,000,000 shares authorized, 0 issued and 
   outstanding ...................................................................................................................     
Common stock, $0.0075 par value, 277,333,332 shares authorized, 119,045,592 
   and 115,892,450 shares issued and outstanding at December 31, 2015 and 2014, 
   respectively ...................................................................................................................     
Additional paid-in capital ................................................................................................     
Accumulated deficit .........................................................................................................     
Total stockholders’ (deficit) equity ............................................................................     
Total liabilities and stockholders’ (deficit) equity ................................................    $

—       

— 

893       
1,136,881       
(1,140,083 )     
(2,309 )     
74,880      $

869 
1,121,707 
(1,119,477)
3,099 
89,402   

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

F-3 

 
  
  
  
 
  
  
     
 
    
       
 
    
       
 
  
    
       
 
    
       
 
    
       
 
  
    
       
 
    
       
 
  
    
       
 
  
       
 
  
 
 
XOMA Corporation 
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS 
(in thousands, except per share amounts) 

2015 

Year Ended December 31, 
2014 

2013 

Revenues: 

License and collaborative fees ..............................................................  $
Contract and other ................................................................................. 
Total revenues .................................................................................. 

$ 

49,064
6,383
55,447

$

5,683
13,183
18,866

Operating expenses: 

Research and development .................................................................... 
Selling, general and administrative ....................................................... 
Restructuring ......................................................................................... 
Total operating expenses ................................................................. 

70,852
20,620
3,699
95,171

80,748
19,866
84
100,698

11,028
24,423
35,451

74,851
18,477
328
93,656

Loss from operations ....................................................................... 

(39,724)

(81,832)

(58,205)

Other income (expense): 

Interest expense ..................................................................................... 
Other income (expense), net .................................................................. 
Revaluation of contingent warrant liabilities ........................................ 
Loss before taxes ............................................................................. 
Benefit from income taxes ............................................................... 
Net loss ............................................................................................  $

(4,194)
5,500
17,812
(20,606)
—
(20,606) $ 

(4,303)
2,061
45,773
(38,301)
—
(38,301) $

Basic net loss per share of common stock ......................................................... $
Diluted net loss per share of common stock...................................................... $
Shares used in computing basic net loss per share of common stock ...............
Shares used in computing diluted net loss per share of common stock.............

(0.17) $ 
(0.17) $ 

(0.36) $
(0.67) $

117,803
117,803

107,435
115,333

(4,631)
(197)
(61,039)
(124,072)
14
(124,058)

(1.43)
(1.43)
86,938
86,938

Other comprehensive loss: 

Net loss ........................................................................................................ $
Net unrealized (loss) gain on available-for-sale securities ..........................

Comprehensive loss ............................................................................... $

(20,606) $ 
—
(20,606) $ 

(38,301) $
1
(38,300) $

(124,058)
(9)
(124,067)

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

F-4 

XOMA Corporation 
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ (DEFICIT) EQUITY  
(in thousands) 

Common Stock 

Shares 

Amount 

Paid-In 
Capital 
977,962    $

Accumulated 
Comprehensive      Accumulated    

Income 

Deficit 
8     $  (957,118)   $

Total 
Stockholders'  
    (Deficit) Equity 
21,467 

615    $

82,447    $

Balance, December 31, 2012 .......................     
Exercise of stock options, contributions to 
933     
   401(k) and incentive plans ........................     
801     
Vesting of restricted stock units ...................     
—     
Stock-based compensation expense .............     
19,661     
Sale of shares of common stock ...................     
1,544     
Exercise of warrants .....................................     
—     
Net loss ........................................................     
Other comprehensive loss ............................     
—     
Balance, December 31, 2013 .......................      105,386     
Exercise of stock options, contributions to 
1,065     
   401(k) and incentive plans ........................     
981     
Vesting of restricted stock units ...................     
—     
Stock-based compensation expense .............     
8,097     
Sale of shares of common stock ...................     
—     
Issuance of warrants .....................................     
363     
Exercise of warrants .....................................     
—     
Net loss ........................................................     
Other comprehensive income .......................     
—     
Balance, December 31, 2014 .......................      115,892     
Exercise of stock options, contributions to 
542     
   401(k) and incentive plans ........................     
1,202     
Vesting of restricted stock units ...................     
—     
Stock-based compensation expense .............     
—     
Issuance of warrants .....................................     
1,410     
Exercise of warrants .....................................     
Net loss ........................................................     
—     
Balance, December 31, 2015 .......................      119,046    $

7     
6     
—     
147     
12     
—     
—     

2,213     
(6)    
5,099     
82,799     
8,336     
—     
—     
787      1,076,403     

11     
7     
—     
61     
—     
3     
—     
—     

4,515     
(7)    
10,772     
37,725     
(10,258)    
2,557     
—     
—     
869      1,121,707     

4     
9     
—     
—     
11     
—     

1,463     
(9)    
9,727     
450     
3,543     
—     
893    $ 1,136,881    $

—     
—       
—     
—       
—     
—       
—     
—       
—     
—       
(124,058)    
—       
(9 )     
—     
(1 )     (1,081,176)    

—     
—       
—     
—       
—     
—       
—     
—       
—     
—       
—     
—       
(38,301)    
—       
1       
—     
—       (1,119,477)    

—     
—       
—     
—       
—     
—       
—     
—       
—     
—       
—       
(20,606)    
—     $ (1,140,083)   $

2,220 
— 
5,099 
82,946 
8,348 
(124,058)
(9)
(3,987)

4,526 
— 
10,772 
37,786 
(10,258)
2,560 
(38,301)
1 
3,099 

1,467 
— 
9,727 
450 
3,554 
(20,606)
(2,309)

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

F-5 

 
  
  
  
  
   
   
  
  
   
   
   
    
 
 
 
XOMA Corporation 
CONSOLIDATED STATEMENTS OF CASH FLOWS 
(in thousands)  

Cash flows used in operating activities: 

Net loss ......................................................................................................................    $
Adjustments to reconcile net loss to net cash used in operating activities: 

(20,606)    $ 

(38,301)    $

(124,058)

2015 

Year Ended December 31, 
2014 

2013 

Depreciation ........................................................................................................     
Common stock contribution to 401(k) ................................................................     
Stock-based compensation expense ....................................................................     
Revaluation of contingent warrant liabilities.......................................................     
Amortization of debt discount, final payment fee on debt, and debt 
   issuance costs ...................................................................................................     
Gain on sale of business in connection with Agenus asset purchase 
   agreement .........................................................................................................     
(Gain) loss on sale and retirement of property and equipment ............................     
Loss on loan extinguishment ...............................................................................     
Unrealized (gain) loss on foreign currency exchange .........................................     
Unrealized loss on foreign exchange options ......................................................     
Other non-cash adjustments ................................................................................     

Changes in assets and liabilities: 

Trade and other receivables, net .............................................................     
Prepaid expenses and other current assets ..............................................     
Accounts payable and accrued liabilities ................................................     
Accrued interest on interest bearing obligations .....................................     
Deferred revenue ....................................................................................     
Other liabilities ........................................................................................    
Net cash used in operating activities .................................................    

Cash flows from investing activities: 

Purchase of investments .............................................................................................    
Proceeds from maturities of investments ....................................................................    
Purchases of property and equipment .........................................................................    
Proceeds from sale of business in connection with Agenus asset purchase 
   agreement ................................................................................................................    
Proceeds from sale of property and equipment ...........................................................    
Net cash provided by investing activities ..........................................    

Cash flows from financing activities: 

Proceeds from issuance of common stock, net of issuance costs ................................    
Proceeds from exercise of warrants ............................................................................    
Proceeds from issuance of long term debt ..................................................................    
Debt issuance costs and loan fees ...............................................................................    
Principal payments – debt ..........................................................................................    
Principal payments – capital lease ..............................................................................    
Net cash provided by financing activities .........................................    

1,532       
986       
9,727       
(17,812)      

1,856      
870      
10,772      
(45,773)     

1,413       

2,707      

(3,505)      
 (18)      
429       
(1,870)      
6       
—       

(761)      
(28)      
(1,621)      
380       
356       
500       
(30,892)      

—       
—       
(430)      

4,862       
18       
4,450       

481       
1       
20,000       
(512)      
(6,128)      
 (41)      
13,801       

—      
—      
—      
(2,280)     
355      
(9)     

472      
(662)     
(3,774)     
(1,444)     
(2,983)     
(88)     
(78,282)     

—      
20,000      
(325)     

—      
—      
19,675      

41,442      
35      
—      
—      
(5,917)     
—      
35,560      

Effect of exchange rate changes on cash .................................................................................    

(37)      

(167)     

Net (decrease) increase in cash and cash equivalents ..............................................................    
Cash and cash equivalents at the beginning of the year ..........................................................    
Cash and cash equivalents at the end of the year.....................................................................   $

(12,678)      
78,445       
65,767     $ 

(23,214)     
101,659      
78,445     $

2,575 
828 
5,099 
61,039 

2,470 

— 
281 
— 
662 
127 
(20)

4,486 
481 
2,901 
2,284 
(3,399)
(1,671)
(45,915)

(19,991)
40,000 
(1,169)

— 
— 
18,840 

84,338 
2,176 
— 
— 
(3,125)
— 
83,389 

— 

56,314 
45,345 
101,659 

Supplemental Cash Flow Information: 

Cash paid for interest ........................................................................................................   $
Non-cash investing and financing activities: 

1,927     $ 

3,009     $

1,262 

Marketable securities received in conjunction with the disposal of business .......   $
Equipment acquired through capital lease ............................................................   $
Reclassification of contingent warrant liability to equity upon 
   exercise of warrants ..........................................................................................   $
Issuance of warrants .............................................................................................   $
Interest added to principal balances on long-term debt ........................................   $
Investment in Symplmed Pharmaceuticals, LLC .................................................   $

496     $ 
323     $ 

(3,552)

$ 
450     $ 
327     $ 
—     $ 

—     $
—     $

$
(2,526)
10,258     $
313     $
—     $

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

— 
— 

(6,171)
— 
935 
171   

F-6 

 
 
  
  
  
  
  
     
     
  
    
       
      
 
    
       
      
 
    
       
      
 
  
  
  
     
  
     
  
  
    
       
      
 
  
  
  
     
  
     
  
  
    
       
      
 
  
  
  
     
  
     
  
  
  
    
       
      
 
  
  
  
     
  
     
  
  
    
       
      
 
    
       
      
 
  
  
XOMA Corporation 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 

1. Description of Business 

XOMA  Corporation  (“XOMA”  or  the  “Company”),  a  Delaware  corporation,  combines  a  portfolio  of  clinical  programs  and 
research activities to develop innovative therapeutic antibodies that it intends to commercialize. XOMA focuses its scientific research 
on allosteric modulation, which offers opportunities for new classes of therapeutic antibodies to treat a wide range of human diseases. 
XOMA’s  scientific  research  has  produced  five  product  candidates  to  treat  diseases  within  the  endocrine  therapeutic  area.    These 
include candidates from the XMet platform, which consists of several Selective Insulin Receptor Modulator antibodies that could offer 
new approaches in the treatment of metabolic diseases.  The lead compound from the XMet platform, XOMA 358, is a fully human 
monoclonal negative allosteric modulating antibody that binds to insulin receptors and attenuates insulin action.  XOMA intends to 
investigate this compound as a novel treatment for non-drug-induced, endogenous hyperinsulinemic hypoglycemia (low blood glucose 
caused  by  excessive  insulin  produced  by  the  body).  In  October  2015,  the  Company  initiated  a  Phase  2  proof-of-concept  study  for 
XOMA  358  in  patients  with  congenital  hyperinsulinemia.    XOMA’s  endocrine  portfolio  also  includes  a  Phase  2  ready  product 
candidate  targeting  the  prolactin  receptor  as  well  as  other  preclinical  or  research  stage  programs.    The  Company’s  products  are 
presently in various stages of development and are subject to regulatory approval before they can be commercially launched. 

On July 22, 2015, the Company announced the Phase 3 EYEGUARD-B study of gevokizumab in patients with Behçet’s disease 
uveitis, run by Servier, its partner for gevokizumab, did not meet the primary endpoint of time to first acute ocular exacerbation.  In 
August 2015, XOMA announced its intention to end the EYEGUARD global Phase 3 program.  In September 2015, Servier notified 
XOMA  of  its  intention  to  terminate  the  Amended  and  Restated  Collaboration  and  License  Agreement  dated  February  14,  2012,  as 
later  amended  on  November  4,  2014  and  January  9,  2015,  and  return  the  gevokizumab  rights  to  XOMA.  Termination  of  the 
collaboration agreement with Servier will be effective on March 25, 2016. As gevokizumab does not fit the Company’s strategic focus 
on endocrine diseases, the Company announced in March 2016 it is closing its Phase 3 study in pyoderma gangrenosum. 

Liquidity and Management Plans 

The Company has incurred operating losses since its inception and had an accumulated deficit of $1.1 billion at December 31, 
2015.   Management  expects  operating  losses  and  negative  cash  flows  to  continue  for  the  foreseeable  future.    As  of  December  31, 
2015, the Company had $66.3 million in cash, cash equivalents and marketable securities, which is available to fund future operations. 
Taking into account the repayment of its outstanding debt classified within current liabilities on the Company’s consolidated balance 
sheet as of December 31, 2015, the Company anticipates that it has adequate resources to fund its operations through December 31, 
2016. 

The  Company’s  ability  to  raise  additional  capital  in  the  equity  and  debt  markets,  should  the  Company  choose  to  do  so,  is 
dependent on a number of factors, including, but not limited to, the market demand for the Company’s common stock, which itself is 
subject to a number of pharmaceutical development and business risks and uncertainties, as well as the uncertainty that the Company 
would be able to raise such additional capital at a price or on terms that are favorable to the Company.   

2. Basis of Presentation and Significant Accounting Policies 

Principles of Consolidation 

The  consolidated  financial  statements  include  the  accounts  of  the  Company  and  its  wholly-owned  subsidiaries.  All 

intercompany accounts and transactions among consolidated entities were eliminated upon consolidation.  

F-7 

 
 
 
 
 
Use of Estimates 

The preparation of financial statements in conformity with generally accepted accounting principles in the United States requires 
management  to  make  estimates  and  assumptions  that  affect  the  reported  amounts  of  assets,  liabilities,  revenue  and  expenses,  and 
related disclosures. On an on-going basis, management evaluates its estimates including, but not limited to, those related to contingent 
warrant  liabilities,  revenue  recognition,  debt  amendments,  research  and  development  expense,  long-lived  assets,  restructuring 
liabilities, legal contingencies, derivative instruments and stock-based compensation. The Company bases its estimates on historical 
experience  and  on  various  other  market-specific  and  other  relevant  assumptions  that  are  believed  to  be  reasonable  under  the 
circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not 
readily apparent from other sources. Actual results may differ significantly from these estimates, such as the Company’s billing under 
government  contracts  and  the  Company’s  accrual  for  clinical  trial  expenses.  Under  the  Company’s  contracts  with  the  National 
Institute of Allergy and Infectious Diseases (“NIAID”), a part of the National Institutes of Health (“NIH”), the Company bills using 
NIH provisional rates and thus is subject to future audits at the discretion of NIAID’s contracting office. These audits can result in an 
adjustment to revenue previously reported which potentially could be significant. The Company’s accrual for clinical trials is based on 
estimates  of  the  services  received  and  efforts  expended  pursuant  to  contracts  with  clinical  trial  centers  and  clinical  research 
organizations.  Payments  under  the  contracts  depend  on  factors  such  as  the  achievement  of  certain  events,  successful  enrollment  of 
patients, and completion of portions of the clinical trial or similar conditions. 

Revenue Recognition 

Revenue is recognized when the four basic criteria of revenue recognition are met: (1) persuasive evidence of an arrangement 
exists;  (2)  delivery  has  occurred  or  services  have  been  rendered;  (3)  the  fee  is  fixed  or  determinable;  and  (4)  collectability  is 
reasonably  assured.  The  determination  of  criteria  (2)  is  based  on  management’s  judgments  regarding  whether  a  continuing 
performance obligation exists. The determination of criteria (3) and (4) are based on management’s judgments regarding the nature of 
the  fee  charged  for  products  or  services  delivered  and  the  collectability  of  those  fees.  Allowances  are  established  for  estimated 
uncollectible amounts, if any. 

The Company recognizes revenue from its license and collaboration arrangements, contract services, product sales and royalties. 
Revenue  arrangements  with  multiple  elements  are  divided  into  separate  units  of  accounting  if  certain  criteria  are  met,  including 
whether the delivered element has stand-alone value to the customer and whether there is objective and reliable evidence of the fair 
value  of  the  undelivered  items.  Each  deliverable  in  the  arrangement  is  evaluated  to  determine  whether  it  meets  the  criteria  to  be 
accounted for as a separate unit of accounting or whether it should be combined with other deliverables. In order to account for the 
multiple-element  arrangements,  the  Company  identifies  the  deliverables  included  within  the  arrangement  and  evaluates  which 
deliverables represent separate units of accounting. Analyzing the arrangement to identify deliverables requires the use of judgment, 
and each deliverable may be an obligation to deliver services, a right or license to use an asset, or another performance obligation. The 
consideration  received  is  allocated  among  the  separate  units  of  accounting  based  on  their  respective  fair  values  and  the  applicable 
revenue  recognition  criteria  are  applied  to  each  of  the  separate  units.  Advance  payments  received  in  excess  of  amounts  earned  are 
classified as deferred revenue until earned. 

License and Collaborative Fees 

Revenue from non-refundable license, technology access or other payments under license and collaborative agreements where 
the Company has a continuing obligation to perform is recognized as revenue over the estimated period of the continuing performance 
obligation.  The  Company  estimates  the  performance  period  at  the  inception  of  the  arrangement  and  reevaluates  it  each  reporting 
period.  Management  makes  its  best  estimate  of  the  period  over  which  it  expects  to  fulfill  the  performance  obligations,  which  may 
include  clinical  development  activities.  Given  the  uncertainties  of  research  and  development  collaborations,  significant  judgment  is 
required to determine the duration of the performance period. This reevaluation  may shorten or lengthen the period over  which the 
remaining revenue is recognized. Changes to these estimates are recorded on a prospective basis.  

License and collaboration agreements with certain third parties also provide for contingent payments to be paid to XOMA based 
solely  upon the performance  of the partner. For such contingent payments revenue is recognized upon completion of the  milestone 
event,  once  confirmation  is  received  from  the  third  party,  provided  that  collection  is  reasonably  assured  and  the  other  revenue 
recognition  criteria  have  been  satisfied.  Milestone  payments  that  are  not  substantive  or  that  require  a  continuing  performance 
obligation on the part of the Company are recognized over the expected period of the continuing performance obligation. Amounts 
received in advance are recorded as deferred revenue until the related milestone is completed. 

F-8 

 
Payment related to an option to purchase the Company’s commercialization rights is considered substantive if, at the inception 
of the arrangement, the Company is at risk as to whether the collaboration partner will choose to exercise the option. Factors that the 
Company  considers  in  evaluating  whether  an  option  is  substantive  include  the  overall  objective  of  the  arrangement,  the  benefit  the 
collaborator might obtain from the arrangement without exercising the option, the cost to exercise the option and the likelihood that 
the option will be exercised. For arrangements under which an option is considered substantive, the Company does not consider the 
item underlying the option to be a deliverable at the inception of the arrangement and the associated option fees are not included in 
allocable  arrangement  consideration,  assuming  the  option  is  not  priced  at  a  significant  and  incremental  discount.  Conversely,  for 
arrangements under which an option is not considered substantive or if an option is priced at a significant and incremental discount, 
the  Company  would  consider  the  item  underlying  the  option  to  be  a  deliverable  at  the  inception  of  the  arrangement  and  a 
corresponding amount would be included in allocable arrangement consideration. 

Contract and Other Revenues 

Contract revenue for research and development involves the Company providing research and development and manufacturing 
services  to  collaborative  partners,  biodefense  contractors  or  others.  Cost  reimbursement  revenue  under  collaborative  agreements  is 
recorded as contract and other revenues and is recognized as the related research and development costs are incurred, as provided for 
under the terms of these agreements. Revenue for certain contracts is accounted for by a proportional performance, or output-based, 
method where performance is based on estimated progress toward elements defined in the contract. The amount of contract revenue 
and related costs recognized in each accounting period are based on management’s estimates of the proportional performance during 
the period. Adjustments to estimates based on actual performance are recognized on a prospective basis and do not result in reversal of 
revenue  should  the  estimate  to  complete  be  extended.  In  2014,  the  Company  had  a  $1.8  million  adjustment  to  decrease  previously 
invoiced balances from the NIAID contract (see Note 4). 

Up-front  fees  associated  with  contract  revenue  are  recorded  as  license  and  collaborative  fees  and  are  recognized  in  the  same 
manner  as  the  final  deliverable,  which  is  generally  ratably  over  the  period  of  the  continuing  performance  obligation.  Given  the 
uncertainties  of  research  and  development  collaborations,  significant  judgment  is  required  to  determine  the  duration  of  the 
arrangement. 

Royalty  revenue  and  royalty  receivables  are  recorded  in  the  periods  these  royalty  amounts  are  earned,  if  estimable  and 
collectibility is reasonably assured. The royalty revenue and receivables recorded in these instances are based upon communication 
with collaborative partners or licensees, historical information and forecasted sales trends. 

Research and Development Expenses 

The Company expenses research and development costs as incurred. Research and development expenses consist of direct costs 
such  as  salaries  and  related  personnel  costs,  and  material  and  supply  costs,  and  research-related  allocated  overhead  costs,  such  as 
facilities costs. In addition, research and development expenses include costs related to clinical trials. From time to time, research and 
development expenses may include up-front fees and milestones paid to collaborative partners for the purchase of rights to in-process 
research and development. Such amounts are expensed as incurred. 

The  Company’s  accrual  for  clinical  trials  is  based  on  estimates  of  the  services  received  and  efforts  expended  pursuant  to 
contracts  with  clinical  trial  centers  and  clinical  research  organizations.  The  Company  may  terminate  these  contracts  upon  written 
notice  and  is  generally  only  liable  for  actual  effort  expended  by  the  organizations  to  the  date  of  termination,  although  in  certain 
instances the Company may be further responsible for termination fees and penalties. The Company makes estimates of its accrued 
expenses as of each balance sheet date based on the facts and circumstances known to the Company at that time. Expenses resulting 
from clinical trials are recorded when incurred based, in part on estimates as to the status of the various trials. In 2014, the Company 
changed its methodology of accrual for the per-patient component of clinical trial expense from straight-line over the patient treatment 
period to scheduled costs as projected by the contract research organization. The change resulted in a $0.2 million adjustment to the 
Company’s accrued estimates for clinical trial activities from inception of the trials through December 31, 2014. 

Stock-Based Compensation 

The  Company  recognizes  compensation  expense  for  all  stock-based  payment  awards  made  to  the  Company’s  employees, 
consultants and directors that are expected to vest based on estimated fair values. The valuation of stock option awards is determined 
at the date of grant using the Black-Scholes Option Pricing Model (the “Black-Scholes Model”). The Black-Scholes Model requires 
inputs such as the expected term of the option, expected volatility and risk-free interest rate. To establish an estimate of expected term, 
the Company considers the vesting period and contractual period of the award and its historical experience of stock option exercises, 
post-vesting cancellations and volatility. The estimate of expected volatility is based on the Company’s historical volatility. The risk-
free rate is based on the yield available on United States Treasury zero-coupon issues corresponding to the expected term of the award.  

F-9 

 
The valuation of restricted stock units (“RSUs”) is determined at the date of grant using the Company’s closing stock price.  

To  establish  an  estimate  of  forfeiture  rate,  the  Company  considers  its  historical  experience  of  option  forfeitures  and 
terminations. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ 
from estimates. 

Restructuring Charges 

Restructuring costs, which primarily include termination benefits and contract termination costs, are recorded at estimated fair 
value.  Key  assumptions  in  determining  the  restructuring  costs  include  the  terms  and  payments  that  may  be  negotiated  to  terminate 
certain contractual obligations and the timing of employees leaving the Company. 

Cash, Cash Equivalents and Marketable Securities 

The  Company  considers  all  highly  liquid  debt  instruments  with  maturities  of  three  months  or  less  at  the  time  the  Company 

acquires them and that can be liquidated without prior notice or penalty to be cash equivalents. 

All  marketable  securities  have  been  classified  as  “available-for-sale”  and  are  carried  at  fair  value,  with  unrealized  gains  and 
losses,  net  of  tax,  if  any,  reported  in  other  comprehensive  income  (loss).  The  estimate  of  fair  value  is  based  on  publicly  available 
market information. Realized gains and losses and declines in value judged to be other-than-temporary on available-for-sale securities 
are included in other income (expense), net. The Company reviews its instruments for other-than-temporary impairment whenever the 
value of the instrument is less than the amortized cost. The cost of investments sold is  based on the specific identification  method. 
Interest and dividends on securities classified as available-for-sale are included in other income (expense), net. 

Property and Equipment and  Long-Lived Assets 

Property and equipment is stated at cost less depreciation. Equipment depreciation is calculated using the straight-line method 
over the estimated useful lives of the assets (three to seven years). Leasehold improvements, buildings and building improvements are 
depreciated using the straight-line method over the shorter of the lease terms or the useful lives (one to fifteen years). Depreciation 
expense for assets acquired through capital leases is included in depreciation expense in the consolidated statements of comprehensive 
loss.  Upon  the  sale  or  retirement  of  assets,  the  cost  and  related  accumulated  depreciation  and  amortization  are  removed  from  the 
consolidated  balance  sheets,  and  the  resulting  gain  or  loss,  if  any,  is  reflected  in  other  income  (expense),  net  in  the  consolidated 
statements of comprehensive loss. Repairs and maintenance costs are charged to expense as incurred. 

Long-lived  assets  include  property  and  equipment.  The  carrying  value  of  our  long-lived  assets  is  reviewed  for  impairment 
whenever events or changes in circumstances indicate that the asset may not be recoverable. An impairment loss would be recognized 
when  estimated  future  cash  flows  expected  to  result  from  the  use  of  the  asset  and  its  eventual  disposition  is  less  than  its  carrying 
amount. During the years ended December 31, 2015, 2014, and 2013, there were no such impairment losses recognized. 

Warrants 

The Company has issued warrants to purchase shares of its common stock in connection with financing activities. The Company 
accounts  for  some  of  these  warrants  as  a  liability  at  fair  value  and  others  as  equity  at  fair  value.  The  fair  value  of  the  outstanding 
warrants  is  estimated  using  the  Black-Scholes  Model.  The  Black-Scholes  Model  requires  inputs  such  as  the  expected  term  of  the 
warrants, expected volatility and risk-free interest rate. These inputs are subjective and require significant analysis and judgment to 
develop. For the estimate of the expected term, the Company uses the full remaining contractual term of the warrant. The Company 
determines  the  expected  volatility  assumption  in  the  Black-Scholes  Model  based  on  historical  stock  price  volatility  observed  on 
XOMA’s  underlying  stock.  The  assumptions  associated  with  contingent  warrant  liabilities  are  reviewed  each  reporting  period  and 
changes in the estimated fair value of these contingent warrant liabilities are recognized in revaluation of contingent warrant liabilities 
within the consolidated statements of comprehensive loss. 

Income Taxes 

The  Company  accounts  for  income  taxes  using  the  liability  method  under  which  deferred  tax  assets  and  liabilities  are 
determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using the enacted 
tax  rates  and  laws  that  will  be  in  effect  when  the  differences  are  expected  to  reverse.  Valuation  allowances  are  established  when 
necessary to reduce deferred tax assets to the amount which is more likely than not to be realizable.  

F-10 

 
The  recognition,  derecognition  and  measurement  of  a  tax  position  is  based  on  management’s  best  judgment  given  the  facts, 
circumstances and information available at each reporting date. The Company’s policy is to recognize interest and penalties related to 
the underpayment of income taxes as a component of income tax expense. To date, there have been no interest or penalties charged in 
relation to the unrecognized tax benefits. 

Net Loss per Share of Common Stock 

Basic  net  loss  per  share  of  common  stock  is  based  on  the  weighted  average  number  of  shares  of  common  stock  outstanding 
during the period. Diluted net loss per share of common stock is based on the weighted average number of shares outstanding during 
the  period,  adjusted  to  include  the  assumed  conversion  of  certain  stock  options,  RSUs,  and  warrants  for  common  stock.  The 
calculation of diluted loss per share of common stock requires that, to the extent the average market price of the underlying shares for 
the reporting period exceeds the exercise price of the warrants and the presumed exercise of such securities are dilutive to earnings 
(loss) per share of common stock for the period, adjustments to net income or net loss used in the calculation are required to remove 
the change in  fair  value of the  warrants  for the period. Likewise, adjustments to the denominator are required to reflect the related 
dilutive shares. 

Recent Accounting Pronouncements 

In  May  2014,  the  Financial  Accounting  Standards  Board  (“FASB”)  issued  guidance  codified  in  Accounting  Standards 
Codification (“ASC”) 606, Revenue Recognition — Revenue from Contracts with Customers, which amends the guidance in ASC 605, 
Revenue  Recognition.  The  standard’s  core  principle  is  that  a  company  will  recognize  revenue  when  it  transfers  promised  goods  or 
services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those 
goods or services. In August 2015, the FASB issued an accounting update to defer the effective date by one year for public entities 
such  that  it  is  now  applicable  for  annual  and  interim  periods  beginning  after  December  15,  2017.  Early  adoption  is  permitted  for 
periods  beginning  after  December  15,  2016.  Entities  would  have  the  option  of  using  either  a  full  retrospective  or  a  modified 
retrospective approach to adopt this new guidance. The Company is currently evaluating the impact of the adoption of this standard on 
its consolidated financial statements. 

In August 2014, the FASB issued Accounting Standards Update (“ASU”) No. 2014-15, Disclosure of Uncertainties about an 
Entity’s Ability to Continue as a Going Concern (“ASU 2014-15”). This ASU introduces an explicit requirement for management to 
assess if there is substantial doubt about an entity’s ability to continue as a going concern, and to provide related footnote disclosures 
in  certain  circumstances.  In  connection  with  each  annual  and  interim  period,  management  must  assess  if  there  is  substantial  doubt 
about an entity’s ability to continue as a going concern within one year after the issuance date. Disclosures are required if conditions 
give rise to substantial doubt. ASU 2014-15 is effective for all entities in the first annual period ending after December 15, 2016. The 
adoption of this guidance is not expected to have any impact on the Company’s financial position and results of operations.  

F-11 

 
  
In April 2015, the FASB issued ASU 2015-03, Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation 
of Debt Issuance Costs (“ASU 2015-03”), which 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 Company 
early  adopted  ASU  2015-03  as  of  January  1,  2015,  as  permitted.  There  is  no  impact  of  early  adoption  of  ASU  2015-03  on  the 
consolidated  statements  of  comprehensive  loss.  The  impact  of  early  adoption  on  the  consolidated  balance  sheets  for  the  periods 
presented is noted in the table below (in thousands): 

December 31, 2015 

December 31, 2014 

Prior to 
Adoption of 
ASU 2015-03   

ASU 2015-03 
Adjustment    As Adopted   

Prior to 
Adoption of 
ASU 2015-03   

ASU 2015-03 
Adjustment    As Adopted   

Prepaid expenses and other 
   current assets .............................   $ 
Total current assets.......................   $ 
Other assets ..................................   $ 
Total assets ...................................   $ 

Interest bearing obligations –  
   current .......................................   $ 
Total current liabilities .................   $ 
Interest bearing obligations –  
   long-term ...................................   $ 
Total liabilities .............................   $ 

2,076   $
72,408   $
838   $
75,243   $

6,099   $
23,484   $

42,931   $
77,552   $

(189) $
(189) $
(174) $
(363) $

(189) $
(189) $

(174) $
(363) $

1,887    $
72,219    $
664    $
74,880    $

5,910    $
23,295    $

42,757    $
77,189    $

2,088   $ 
83,842   $ 
669   $ 
89,631   $ 

19,247   $ 
36,475   $ 

16,290   $ 
86,532   $ 

(229) $
(229) $
-  $
(229) $

(229) $
(229) $

-  $
(229) $

1,859 
83,613 
669 
89,402 

19,018 
36,246 

16,290 
86,303   

In  November  2015,  the  FASB  issued  ASU  2015-17, Balance  Sheet  Classification  of  Deferred  Taxes,  which  simplifies  the 
presentation  of  deferred  income  taxes.    This  ASU  amends  the  existing  guidance  to  require  presentation  of  deferred  tax  assets  and 
liabilities  as  noncurrent  within  a  classified  statement  of  financial  position.  The  Company  early  adopted  ASU  2015-17 effective 
December 2015 on a prospective basis. The adoption did not have an impact on the consolidated financial statements of the Company. 

In  January  2016,  the  FASB  issued  ASU  2016-01,  Financial  Instruments—Overall  (Subtopic  825-10):  Recognition  and 
Measurement of Financial Assets and Financial Liabilities, related to accounting for equity investments, financial liabilities under the 
fair  value  option,  and  the  presentation  and  disclosure  requirements  for  financial  instruments.  In  addition,  the  FASB  clarified  the 
guidance  related  to  the  valuation  allowance  assessment  when  recognizing  deferred  tax  assets  resulting  from  unrealized  losses  on 
available-for-sale debt securities. The guidance will become effective for the Company beginning in the first quarter of 2018. Early 
adoption is permitted. The Company is evaluating the impact of the adoption of this accounting guidance on its consolidated financial 
statements. 

F-12 

 
 
  
 
 
  
  
  
    
 
 
     
     
 
 
 
 
In  February  2016,  the  FASB  issued  ASU  2016-02,  Leases  (Topic  842)  which  supersedes  Topic  840,  Leases.  From  a  lessee 
accounting perspective, the core principle of Topic 842 is that a lessee should recognize the assets and liabilities that arise from leases. 
A lessee should recognize in the statement of financial position a liability to make lease payments (the lease liability) and a right-of-
use  asset  representing  its  right  to  use  the  underlying  asset  for  the  lease  term.  When  measuring  assets  and  liabilities  arising  from  a 
lease, a lessee (and a lessor) should include payments to be made in optional periods only if the lessee is reasonably certain to exercise 
an  option  to  extend  the  lease  or  not  to  exercise  an  option  to  terminate  the  lease.  Similarly,  optional  payments  to  purchase  the 
underlying asset should be included in the measurement of lease assets and lease liabilities only if the lessee is reasonably certain to 
exercise that purchase option. Reasonably certain is a high threshold that is consistent with and intended to be applied in the same way 
as  the  reasonably  assured  threshold  under  Topic  840.  In  addition,  also  consistent  with  Topic  840,  a  lessee  (and  a  lessor)  should 
exclude most variable lease payments in measuring lease assets and lease liabilities, other than those that depend on an index or a rate 
or are in substance fixed payments. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy 
election  by  class  of  underlying  asset  not  to  recognize  lease  assets  and  lease  liabilities.  If  a  lessee  makes  this  election,  it  should 
recognize lease expense for such leases generally on a straight-line basis over the lease term. Under Topic 842, there continues to be a 
differentiation between finance leases (which replaces capital leases) and operating leases. However, the principal difference from the 
previous guidance is that the lease assets and lease liabilities arising from operating leases should be recognized in the statement of 
financial  position.  The  accounting  applied  by  a  lessor  is  largely  unchanged  from  that  applied  under  Topic  840.  The  guidance  will 
become effective for the Company beginning in the first quarter of 2019. Early adoption is permitted. In transition, lessees and lessors 
are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. 
The modified retrospective approach includes a number of optional practical expedients primarily focused on leases that commenced 
before  the  effective  date  of  Topic  842,  including  continuing  to  account  for  leases  that  commence  before  the  effective  date  in 
accordance  with  previous  guidance,  unless  the  lease  is  modified.  The  Company  is  evaluating  the  impact  of  the  adoption  of  the 
standard on its consolidated financial statements. 

3. Consolidated Financial Statement Detail 

Cash and Cash Equivalents 

At December 31, 2015, cash and cash equivalents consisted of demand deposits of $23.2 million and money market funds of 
$42.6 million with maturities of less than 90 days at the date of purchase. At December 31, 2014, cash and cash equivalents consisted 
of  demand  deposits  of  $10.8  million  and  money  market  funds  of  $67.6  million  with  maturities  of  less  than  90  days  at  the  date  of 
purchase. 

Marketable Securities 

At December 31, 2015, marketable securities consisted of an investment in the common stock of a public entity of $0.5 million. 
At  December  31,  2014,  there  were  no  marketable  securities.  The  Company  had  no  unrealized  gains  or  losses  associated  with  its 
marketable securities as of December 31, 2015. 

Foreign Exchange Options 

The Company holds debt and may incur revenue and expenses denominated in foreign currencies, which exposes it to market 
risk associated with foreign currency exchange rate fluctuations between the U.S. dollar and the Euro. The Company is required in the 
future  to  make  principal  and  accrued  interest  payments  in  Euros  on  its  €15.0  million  loan  from  Servier  (see  Note  8).  In  order  to 
manage its foreign currency exposure related to these payments, in May 2011, the Company entered into two foreign exchange option 
contracts to buy €1.5 million and €15.0 million in January 2014 and January 2016, respectively. By having these option contracts in 
place, the Company’s foreign exchange rate risk is reduced if the U.S. dollar weakens against the Euro. However, if the U.S. dollar 
strengthens against the Euro, the Company is not required to exercise these options, but will not receive any refund on premiums paid. 

Upfront premiums paid on these foreign exchange option contracts totaled $1.5 million. The fair values of these option contracts 
are revalued at each reporting period and are estimated based on pricing models using readily observable inputs from actively quoted 
markets. The fair values of these option contracts are included in other assets on the consolidated balance sheet and changes in fair 
value on these contracts are included in other income (expense), net on the consolidated statements of comprehensive loss. 

As of December 31, 2014, one option contract had expired.  The remaining foreign exchange option was revalued at December 
31, 2015 and 2014 and the fair value was zero.  The Company recognized losses of $6,000, $0.4 million, and $0.1 million related to 
the revaluation of these options for the years ended December 31, 2015, 2014, and 2013, respectively. 

F-13 

 
 
 
Trade and Other Receivables, net 

Trade receivables are stated at their net realizable value.  Specific allowances are recorded for known troubled accounts or based 
on other available information. The Company reviews their exposure to accounts receivable, including the requirement for allowances 
based on  management’s judgment. The Company  has  not  historically experienced any significant losses. As of December 31, 2015 
and 2014, the allowance for doubtful accounts amounted to $0.2 million and $0.4 million, respectively. Trade receivables are written 
off  after  all  reasonable  means  to  collect  the  full  amount  have  been  exhausted.  The  Company  has  not  historically  experienced  any 
significant losses. 

Trade and other receivables consisted of the following (in thousands): 

Trade receivables, net ...............................................................    $
Other receivables ......................................................................   

Total ....................................................................................    $

3,718    $ 
351      
4,069    $ 

2,993  
316  
3,309  

December 31, 

2015 

2014 

Property and Equipment, net 

Property and equipment, net consisted of the following (in thousands): 

Equipment and furniture ...........................................................    $
Buildings, leasehold and building improvements .....................  
Construction-in-progress ...........................................................   
Land ..........................................................................................   

Less:  Accumulated depreciation and amortization ..................  
Property and equipment, net .....................................................   $

December 31, 

2015 

2014 

14,431    $ 
2,776      
243      
—      
17,450      
(15,453)     
1,997    $ 

28,638  
9,343  
337  
310  
38,628  
(33,508 )
5,120   

As  of  December  31,  2015,  property  and  equipment  held  under  capital  leases,  included  under  construction-in-progress  above, 
amounted  to  $0.2  million,  with  accumulated  depreciation  of  zero.  Depreciation  and  amortization  expense  was  $1.5  million,  $1.9 
million,  and  $2.9  million  for  the  years  ended  December  31,  2015,  2014,  and  2013,  respectively.  In  December  2015,  the  Company 
completed the sale of its land, building and certain equipment used for its manufacturing operations (see Note 6). The related cost and 
accumulated  depreciation  and  amortization  amounts  of  $15.9  million  and  $13.7  million,  respectively,  have  been  removed  from  the 
consolidated  balance  sheet  and  a  gain  of  $3.5  million  was  recorded  on  the  other  income  (expense),  net  line  of  the  Company’s  
consolidated statements of comprehensive loss for the year ended December 31, 2015.   

Accrued and Other Liabilities 

Accrued and other liabilities consisted of the following (in thousands): 

Accrued management incentive compensation .........................................   $
Accrued payroll and other benefits ...........................................................    
Accrued legal and accounting fees ...........................................................    
Accrued restructuring costs ......................................................................    
Accrued clinical trial costs........................................................................    
Other .........................................................................................................    
Total ....................................................................................................   $

December 31, 

2015 

2014 

2,609      $ 
2,156       
517       
459       
406        
878        
7,025      $ 

4,295 
3,061 
409 
— 
1,424 
703 
9,892  

F-14 

 
  
  
 
 
  
 
   
 
  
  
  
 
 
  
 
    
 
  
 
  
  
  
  
 
  
  
    
 
 
 
4. Collaborative, Licensing and Other Arrangements 

Collaborative and Other Agreements 

Novartis 

In November 2008, the Company restructured its product development collaboration with Novartis AG (“Novartis”) entered into 
in  2004  for  the  development  and  commercialization  of  antibody  products  for  the  treatment  of  cancer.  Under  the  restructured 
agreement, the Company received $6.2 million in cash and $7.5 million in the form of debt reduction on its existing loan facility with 
Novartis. In addition, the Company could, in the future, receive potential milestones of up to $14.0 million and royalty rates which 
ranged from low-double digit to high-teen percentage rates for two ongoing product programs, CD40 and prolactin receptor antibodies 
and  options  to  develop  or  receive  royalties  on  additional  programs.  In  exchange,  Novartis  received  control  over  the  CD40  and 
prolactin  receptor  antibody  programs,  as  well  as  the  right  to  expand  the  development  of  these  programs  into  additional  indications 
outside of oncology. Novartis has returned control of the prolactin receptor antibody program to the Company; which is now referred 
to as XOMA 213. The Company’s right to royalty-style payments expires on the later of the expiration of any licensed patent covering 
each product or 20 years from the launch of each product that is produced from a cell line provided to Novartis by XOMA. In 2013, 
the  Company  received  a  $7.0  million  milestone  relating  to  one  currently  active  program.  Pursuant  to  the  obligations  under  the 
agreement, in January 2014, the Company made a payment, equal to 25 percent of the milestone received, or $1.75 million, toward its 
outstanding  debt  obligation  to  Novartis.  In  2014  and  2015,  no  revenue  was  recognized  under  the  collaboration  agreement  with 
Novartis. 

A loan facility of up to $50.0 million was available to the Company to fund up to 75% of its share of development expenses 

incurred beginning in 2005 (see Note 8). 

On  September  30,  2015  (the  “Effective  Date”),  the  Company  and  Novartis  International  Pharmaceutical  Ltd.  (“Novartis 
International”)  entered  into  a  license  agreement  (the  “License  Agreement”)  pursuant  to  which  the  Company  granted  Novartis 
International  an  exclusive,  world-wide,  royalty-bearing  license  to  the  Company’s  anti-transforming  growth  factor  beta  (TGF(cid:533)) 
antibody program (the “anti-TGF(cid:533) Program”). Under the terms of the License Agreement, Novartis International has worldwide rights 
to  the  anti-TGF(cid:533)  Program  and  is  responsible  for  the  development  and  commercialization  of  antibodies  and  products  containing 
antibodies arising from the anti-TGF(cid:533) Program. Within 90 days of the Effective Date, the Company was required to transfer certain 
proprietary know-how,  materials and inventory relating to the anti-TGF(cid:533) Program to Novartis International. The transfer of certain 
proprietary  know-how,  materials  and  inventory  relating  to  the  anti-TGF(cid:533)  Program  to  Novartis  International  was  completed  in  the 
fourth quarter of 2015. 

Under the License Agreement, the Company received a $37.0 million upfront fee. The Company is also eligible to receive up to 
a  total  of  $480.0  million  in  development,  regulatory  and  commercial  milestones.  Any  such  payments  will  be  treated  as  contingent 
consideration and recognized as revenue when they are achieved, as the Company has no performance obligations under the License 
Agreement beyond the initial 90-day period. No milestone payments have been received as of December 31, 2015. The Company is 
also eligible to receive royalties on sales of licensed products, which are tiered based on sales levels and range from a mid-single digit 
percentage  rate  to  up  to  a  low  double-digit  percentage  rate.  Novartis  International’s  obligation  to  pay  royalties  with  respect  to  a 
particular product and country will continue for the longer of the date of expiration of the last valid patent claim covering the product 
in that country, or ten years from the date of the first commercial sale of the product in that country. 

The License Agreement contains customary termination rights relating to material breach by either party. Novartis International 
also  has  a  unilateral  right  to  terminate  the  License  Agreement  on  an  antibody-by-antibody  and  country-by-country  basis  or  in  its 
entirety on one hundred eighty days’ notice. 

The  Company  identified  the  following  performance  deliverables  under  the  License  Agreement:  (i)  the  license,  (ii)  regulatory 
services  to  be  delivered  within  90  days  from  the  Effective  Date  and  (iii)  transfer  of  materials,  process  and  know-how,  also  to  be 
delivered  within  90  days  from  the  Effective  Date.  The  Company  considered  the  provisions  of  the  multiple-element  arrangement 
guidance in determining how to recognize the revenue associated with these deliverables. The Company determined that none of the 
deliverables  have  standalone  value  and  therefore  has  accounted  for  them  as  a  single  unit  of  account.  The  Company  recognized  the 
entire upfront payment as revenue in the consolidated statement of comprehensive loss as it had completed its performance obligations 
as of December 31, 2015. 

F-15 

 
 In  connection  with  the  execution  of  the  License  Agreement,  XOMA  and  Novartis  Vaccines  Diagnostics,  Inc.  (“NVDI”) 
executed  an  amendment  to  their  Amended  and  Restated  Research,  Development  and  Commercialization  Agreement  dated  July  1, 
2008,  as  amended,  relating  to  anti-CD40  antibodies  (the  “Collaboration  Agreement  Amendment”).  Pursuant  to  the  Collaboration 
Agreement Amendment, the parties agreed to reduce the royalty rates and period that XOMA is eligible to receive on sales of NVDI’s 
clinical stage anti-CD40 antibodies. These royalties are tiered based on sales levels and now range from a mid-single digit percentage 
rate to up to a low double-digit percentage rate and royalties are payable until the later of any licensed patent covering each product or 
ten years from the launch of each product. In addition, XOMA and NVDI amended the note agreement to extend the maturity date of 
the  note  from  September  30,  2015  to  September  30,  2020  (see  Note  8).  All  other  terms  of  the  Amended  and  Restated  Research, 
Development and Commercialization Agreement remained unchanged. 

Servier 

In December 2010, the Company entered into a license and collaboration agreement (“Collaboration Agreement”) with Servier, 
to jointly develop and commercialize gevokizumab in multiple indications, which provided for a non-refundable upfront payment of 
$15.0 million that was received by the Company in January 2011. The upfront payment was recognized over the eight month period 
that the initial group of deliverables were provided to Servier. In addition, the Company received a loan of €15.0 million, which was 
fully funded in January 2011, with the proceeds converting to $19.5 million at the date of funding (see Note 8). Under the terms of the 
Collaboration Agreement, Servier had worldwide rights to cardiovascular disease and diabetes indications and had rights outside the 
United  States  and  Japan  to  all  other  indications,  including  non-infectious  intermediate,  posterior  or  pan-uveitis  (“NIU”),  Behçet’s 
disease  uveitis,  pyoderma  gangrenosum,  and  other  inflammatory  and  oncology  indications.  XOMA  retained  development  and 
commercialization rights in the United States and Japan for all indications other than cardiovascular disease and diabetes.   

Under  the  Collaboration  Agreement,  Servier  funded  all  activities  to  advance  the  global  clinical  development  and  future 
commercialization  of  gevokizumab  in  cardiovascular-related  diseases and  diabetes.    Also,  Servier  funded  the  first  $50.0  million  of 
gevokizumab  global  clinical  development  and  chemistry,  manufacturing  and  controls  expenses  related  to  the  three  pivotal  clinical 
trials  under  the  EYEGUARD  program.  All  remaining  expenses  related  to  these  three  pivotal  clinical  trials  were  shared  equally 
between Servier and the Company. For the years ended December 31, 2015, 2014, and 2013, the Company recorded revenue of $1.2 
million, $3.5 million, and $13.6 million, respectively, from this Collaboration Agreement. 

On January 9, 2015, concurrent with a loan amendment (see Note 8), the Company and Servier entered into Amendment No. 2 
to  the  Collaboration  Agreement  (“Collaboration  Amendment”).  Under  the  Collaboration  Agreement,  the  Company  was  eligible  to 
receive up to approximately €356.5 million in the aggregate in milestone payments if the Company re-acquired cardiovascular and/or 
diabetes rights for use in the United States, and approximately €633.8 million in aggregate milestone payments if the Company did not 
re-acquire  those  rights.  Under  the  Collaboration  Amendment,  the  Company  was  eligible  to  receive  up  to  €341.5  million  in  the 
aggregate in milestone payments in the event the Company re-acquired the cardiovascular and/or diabetes rights for use in the United 
States and approximately €618.8 million if the Company did not re-acquire those rights. The milestone reductions were related to a 
low prevalence indication for which Servier would not have pursued development had these payments been required. All other terms 
of the Collaboration Agreement remained unchanged. 

On  September  28,  2015,  Servier  notified  XOMA  of  its  intention  to  terminate  the  Collaboration  Agreement,  as  amended,  and 
return the gevokizumab rights to XOMA. The termination will be effective on March 25, 2016, and does not result in a change to the 
maturity  date  of  the  Company’s  loan  with  Servier  (see  Note  8).  As  the  Company  will  no  longer  be  required  to provide  services  to 
Servier  under  the  Collaboration  Agreement  beyond  the  effective  date,  the  Company  will  amortize  the  remaining  deferred  revenue 
through March 2016. As of December 31, 2015, the deferred revenue – current associated with this collaboration was $0.6 million. 

F-16 

 
NIAID 

In  September  2008,  the  Company  announced  that  it  had  been  awarded  a  $64.8  million  multiple-year  contract  funded  with 
federal  funds  from  NIAID  (Contract  No.  HHSN272200800028C),  to  continue  the  development  of  anti-botulinum  antibody  product 
candidates. The contract work is being performed on a cost plus fixed fee basis over a three-year period. The Company recognizes 
revenue  under  the  arrangement  as  the  services  are  performed  on  a  proportional  performance  basis.  In  2011,  the  NIH  conducted  an 
audit of the Company’s actual data for period from January 1, 2007 through December 31, 2009 and developed final billing rates for 
this period. As a result, the Company retroactively applied these NIH rates to the invoices from this period resulting in an increase in 
revenue of $1.1 million from the NIH, excluding $0.9 million billed to the NIH in 2010 resulting from the Company’s performance of 
a comparison of 2009 calculated costs incurred and costs billed to the government under provisional rates. In 2014, upon completion 
of a NIAID review of hours and external expenses, XOMA agreed to exclude certain hours and external expenses resulting in a $1.8 
million adjustment to decrease previously invoiced balances. The adjustment was offset by a $1.9 million deferred revenue balance 
that was recorded in 2012 as a result of a rate adjustment for the period 2007 to 2009. This adjustment reduced accounts receivable 
and deferred revenue by $1.8 million to reflect the final settlement of the 2008 to 2013 hours and external review. The remaining $0.1 
million in deferred revenue in connection with the 2011 NIH rate audit will be recognized upon completion of negotiations with and 
approval  by  the  NIH.  The  Company  recognized  revenue  of  $0.2  million,  $1.2  million  and  $4.4  million  under  this  contract,  for  the 
years ended December 31, 2015, 2014 and 2013, respectively. 

In  October  2011,  the  Company  announced  that  NIAID  had  awarded  the  Company  a  new  contract  under  Contract  No. 
HHSN272201100031C  for  up  to  $28.0  million  over  five  years  to  develop  broad-spectrum  antitoxins  for  the  treatment  of  human 
botulism poisoning. The contract work is being performed on a cost plus fixed fee basis over the life of the contract and the Company 
is  recognizing  revenue  under  the  arrangement  as  the  services  are  performed  on  a  proportional  performance  basis.  The  Company 
recognized revenue of $4.9 million, $8.4 million and $4.7 million under this contract, for the years ended December 31, 2015, 2014 
and 2013, respectively.  

Takeda 

In November 2006, the Company entered into a fully funded collaboration agreement with Takeda for therapeutic monoclonal 
antibody discovery and development. Under the agreement, Takeda will make up-front, annual maintenance and milestone payments 
to  the  Company,  fund  its  research  and  development  and  manufacturing  activities  for  preclinical  and  early  clinical  studies  and  pay 
royalties on sales of products resulting from the collaboration. Takeda will be responsible for clinical trials and commercialization of 
drugs after an Investigational New Drug Application submission and is granted the right to manufacture once the product enters into 
Phase 2 clinical trials. During the collaboration, the Company will discover therapeutic antibodies against targets selected by Takeda. 
The  Company  will  recognize  revenue  on  the  up-front  and  annual  payments  on  a  straight-line  basis  over  the  expected  term  of  each 
target antibody discovery, on the research and development and manufacturing services as they are performed on a time and materials 
basis,  on  the  milestones  when  they  are  achieved  and  on  the  royalties  when  the  underlying  sales  occur.  The  Company  recognized 
revenue of $0.1 million, $1.6 million and $0.1 million under this agreement for the years ended December 31, 2015, 2014 and 2013, 
respectively. 

Under the terms of this agreement, the Company may receive milestone payments aggregating up to $19.0 million relating to 
one undisclosed product candidate and low single-digit royalties on future sales of all products subject to this license.  In addition, in 
the  event  Takeda  were  to  develop  additional  future  qualifying  product  candidates  under  the  terms  of  the  agreement,  the  Company 
would be eligible for milestone payments aggregating up to $20.8 million for each such qualifying product candidate.  The Company’s 
right  to  milestone  payments  expires  on  the  later  of  the  receipt  of  payment  from Takeda  of  the  last  amount  to  be  paid  under  the 
agreement  or  the  cessation  of  all  research  and  development  activities  with  respect  to  all  program  antibodies,  collaboration  targets 
and/or collaboration products.  The Company’s right to royalties expires on the later of 13.5 years from the first commercial sale of 
each royalty-bearing discovery product or the expiration of the last-to-expire licensed patent. 

In February 2009, the Company expanded its existing collaboration agreement with Takeda to provide Takeda with access to 
multiple  antibody  technologies,  including  a  suite  of  research  and  development  technologies  and  integrated  information  and  data 
management systems. The Company  may receive  milestones of up to $3.3 million per discovery product candidate and low single-
digit royalties on future sales of all antibody products subject to this license. The Company’s right to milestone payments expires on 
the later of the receipt of payment from Takeda of the last amount to be paid under the agreement or the cessation of all research and 
development  activities  with  respect  to  all  program  antibodies,  collaboration  targets  and/or  collaboration  products.  The  Company’s 
right  to  royalties  expires  on  the  later  of  10  years  from  the  first  commercial  sale  of  such  royalty-bearing  discovery  product,  or  the 
expiration of the last-to-expire licensed patent.  

F-17 

 
Pfizer 

In  August  2007,  the  Company  entered  into  a  license  agreement  (the  “2007  Agreement”)  with  Pfizer  Inc.  (“Pfizer”)  for  non-
exclusive, worldwide rights for XOMA’s patented bacterial cell expression technology for research, development and manufacturing 
of antibody products. Under the terms of the 2007 Agreement, the Company received a license fee payment of $30.0 million in 2007. 

From 2011 through 2015, the Company received milestone payments aggregating $4.2 million. 

On  December  3,  2015,  the  Company  and  Pfizer  entered  into  a  settlement  and  amended  license  agreement  pursuant  to  which 
XOMA  granted  Pfizer  a  fully-paid,  royalty-free,  worldwide,  irrevocable,  non-exclusive  license  right  to  XOMA’s  patented  bacterial 
cell  expression  technology  for  phage  display  and  other  research,  development  and  manufacturing  of  antibody  products.  Under  the 
amended  license  agreement,  the  Company  received  a  cash  payment  of  $3.8  million  in  full  satisfaction  of  all  obligations  to  XOMA 
under the 2007 Agreement, including but not limited to potential  milestone, royalty and other fees under the 2007 Agreement. The 
Company recognized the entire payment from Pfizer as revenue upon delivery of the license in 2015.  

In August 2005, the Company entered into a license agreement with Wyeth (subsequently acquired by Pfizer) for non-exclusive, 
worldwide rights for certain of XOMA’s patented bacterial cell expression technology for vaccine manufacturing. Under the terms of 
this agreement, the Company received a milestone payment in November 2012 relating to TRUMENBA®, a meningococcal group B 
vaccine marketed by Pfizer. The Company receives a fraction of a percentage of sales of TRUMENBA as royalties. The Company’s 
right to royalties expires on a country-by-country basis upon the later of the expiration of the last-to-expire licensed patent or 10 years 
from the first commercial sale of TRUMENBA.    

Novo Nordisk 

On December 1, 2015, the Company and Novo Nordisk  A/S (“Novo Nordisk ”) entered into a license agreement pursuant to 
which  XOMA  has  granted  to  Novo  Nordisk  an  exclusive,  world-wide,  royalty-bearing  license  to  XOMA’s  XMetA  program  of 
allosteric monoclonal antibodies that positively modulate the insulin receptor (the “XMetA Program”), subject to XOMA’s retained 
commercialization  rights  for  rare  disease  indications.  Novo  Nordisk  has  an  option  to  add  these  retained  rights  to  its  license  upon 
payment of an option fee. 

Novo  Nordisk  will  have  worldwide  rights  to  the  XMetA  Program  and  will  be  solely  responsible  at  its  expense  for  the 
development and commercialization of antibodies and products containing antibodies arising from the XMetA Program, subject to the 
Company’s retained rights described above. The Company has transferred certain proprietary know-how and materials relating to the 
XMetA  Program  to  Novo  Nordisk.  Under  the  agreement,  XOMA  received  a  $5.0  million,  non-creditable,  non-refundable,  upfront 
payment.  Based  on  the  achievement  of  pre-specified  criteria,  XOMA  is  eligible  to  receive  up  to  $290.0  million  in  development, 
regulatory and commercial milestones. No milestone payments have been received as of December 31, 2015.  XOMA is also eligible 
to receive royalties on sales of licensed products, which are tiered based on sales levels and range from a mid-single digit percentage 
rate to up to a high single digit percentage rate. Novo Nordisk’s obligation to pay development and commercialization milestones will 
continue  for  so  long  as  Novo  Nordisk  is  developing  or  selling  products  under  the  agreement,  subject  to  the  maximum  milestone 
payment  amounts  set  forth  above.  Novo  Nordisk’s  obligation  to  pay  royalties  with  respect  to  a  particular  product  and  country  will 
continue for the longer of the date of expiration of the last valid patent claim covering the product in that country, or ten years from 
the date of the first commercial sale of the product in that country. 

The  agreement  contains  customary  termination  rights  relating  to  material  breach  by  either  party.  Novo  Nordisk  also  has  a 

unilateral right to terminate the agreement in its entirety upon 90 days’ notice. 

The  Company  identified  the  following  performance  deliverables  under  the  agreement:  (i)  the  license,  and  (ii)  the  transfer  of 
technology and know-how to be delivered within 60 days from December 1, 2015. The Company has delivered the majority of the 
technology and know-how to Novo Nordisk as of December 31, 2015 and determined that any remaining items are perfunctory to the 
arrangement. Accordingly, the Company has recognized the entire $5.0 million upfront fee as revenue in 2015.   

F-18 

 
 
 
5. Fair Value Measurements 

The  Company  records  its  financial  assets  and  liabilities  at  fair  value.  The  carrying  amounts  of  certain  of  the  Company’s 
financial instruments, including cash and cash equivalents, marketable securities, trade receivable and accounts payable, approximate 
their fair value due to their short maturities. Fair value is defined as the exchange price that would be received from selling an asset or 
paid to transfer a liability in an orderly transaction between market participants at the measurement date. The accounting guidance for 
fair  value  establishes  a  framework  for  measuring  fair  value  and  a  fair  value  hierarchy  that  prioritizes  the  inputs  used  in  valuation 
techniques.  The  accounting  standard  describes  a  fair  value  hierarchy  based  on  three  levels  of  inputs,  of  which  the  first  two  are 
considered observable and the last unobservable, that may be used to measure fair value which are the following: 

Level 1 – Observable inputs, such as quoted prices in active markets for identical assets or liabilities. 

Level  2  –  Observable  inputs,  either  directly  or  indirectly,  other  than  quoted  prices  in  active  markets  for  similar  assets  or 
liabilities,  that  are  not  active  or  other  inputs  that  are  not  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; therefore, requiring an entity to develop its own valuation techniques and assumptions. 

The following tables set forth the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on 

a recurring basis as follows (in thousands): 

Fair Value Measurements at December 31, 2015 Using 

Quoted Prices in 
Active Markets for
Identical Assets
(Level 1) 

Significant Other 
Observable 
Inputs
(Level 2) 

Significant 
Unobservable 
Inputs 
(Level 3) 

Total 

Assets: 

Money market funds (1) .................................   $
Marketable securities ....................................    
Total ........................................................   $

42,590    $
496     
43,086    $

—    $ 
—     
—    $ 

—     $
—      
—     $

42,590 
496 
43,086 

Liabilities: 

Contingent warrant liabilities ........................   $

—    $

—    $ 

10,464     $

10,464   

Fair Value Measurements at December 31, 2014 Using 

Quoted Prices in 
Active Markets for
Identical Assets
(Level 1) 

Significant Other
Observable 
Inputs
(Level 2) 

Significant 
Unobservable 
Inputs 
(Level 3) 

Total 

Assets: 

Money market funds (1) ..................................  $
Foreign exchange options (2) ..........................   
Total .........................................................  $

67,569    $
—     
67,569    $

—    $ 
6     
6    $ 

—     $
—      
—     $

67,569 
6 
67,575 

Liabilities: 

Contingent warrant liabilities .........................  $

—    $

—    $ 

31,828     $

31,828   

(1) Included in cash and cash equivalents 
(2) Included in other assets 

During the years ended December 31, 2015 and 2014, there were no transfers between Level 1, Level 2, or Level 3 assets or 
liabilities  reported  at  fair  value  on  a  recurring  basis  and  the  valuation  techniques  used  did  not  change  compared  to  the  Company’s 
established practice. 

The estimated fair value of the foreign exchange options as of December 31, 2015 was zero.  The estimated fair value of the 
foreign  exchange  options  at  December  31,  2015  and  2014  was  determined  using  readily  observable  market  inputs  from  actively 
quoted markets obtained from various third-party data providers. These inputs, such as spot rate, forward rate and volatility have been 
derived from readily observable market data, meeting the criteria for Level 2 in the fair value hierarchy. The change in the fair value is 
recorded in other income (expense), net line of the consolidated statements of comprehensive loss. 

F-19 

 
 
  
 
 
  
 
   
   
          
 
  
 
   
   
     
 
   
     
     
      
 
  
   
     
     
      
 
   
     
     
      
 
  
  
 
 
  
 
   
   
       
  
 
  
 
   
   
     
 
   
     
     
      
 
  
   
     
     
      
 
   
     
     
      
 
  
The estimated fair value of the contingent warrant liabilities at December 31, 2015 and 2014 was determined using the Black-
Scholes Model, which requires inputs such as the expected term of the warrants, volatility and risk-free interest rate. These inputs are 
subjective  and  generally  require  significant  analysis  and  judgment  to  develop.  The  Company’s  common  stock  price  represents  a 
significant input that affects the valuation of the warrants. The change in the fair value is recorded as a gain or loss in the revaluation 
of contingent warrant liabilities line of the consolidated statements of comprehensive loss. 

The  estimated  fair  value  of  the  contingent  warrant  liabilities  was  estimated  using  the  following  range  of  assumptions  at 

December 31, 2015 and 2014: 

December 31, 

Expected volatility .........................................................................  166% - 183%    
Risk-free interest rate .....................................................................  0.64% - 0.74%    0.03% - 0.67%
Expected term (in years) ................................................................ 

0.94 - 1.19 

0.09 - 2.19 

2015 

2014 
70% - 73% 

The following table provides a summary of changes in the fair value of the Company’s Level 3 financial liabilities for the years 

ended December 31, 2015 and 2014 (in thousands): 

Balance at December 31, 2013 ...................................................... 
Initial fair value of warrants issued in December 2014 warrant .... 
Reclassification of contingent warrant liability to equity upon 
   exercise of warrants .................................................................... 
Decrease in estimated fair value of contingent warrant liabilities 
   upon revaluation ......................................................................... 
Balance at December 31, 2014 ...................................................... 
Reclassification of contingent warrant liability to equity upon 
   exercise of warrants .................................................................... 
Decrease in estimated fair value of contingent warrant liabilities 
   upon revaluation ......................................................................... 
Balance at December 31, 2015 ...................................................... 

$

$

69,869 
10,258 

(2,526 ) 

(45,773 ) 
31,828   

(3,552 ) 

(17,812 ) 
10,464    

The  fair  value  of  the  Company’s  outstanding  interest-bearing  obligations  is  estimated  using  the  net  present  value  of  the 
payments, discounted at an interest rate that is consistent with market interest rates, which is a Level 2 input. The carrying amount and 
the estimated fair value of the Company’s outstanding interest-bearing obligations at December 31, 2015 and 2014 are as follows (in 
thousands): 

Hercules term loan ...........................................................................   $
Servier loan ......................................................................................    
Novartis note ....................................................................................    
General Electric Capital Corporation term loan ...............................    
Total .................................................................................................   $

19,653    $
15,331     
13,683     
—     
48,667    $

21,231     $ 
15,185       
13,394       
—       
49,810     $ 

—    $
16,290     
13,357     
5,661     
35,308    $

— 
17,068 
12,923 
6,470 
36,461  

December 31, 2015 

December 31, 2014 

  Carrying Amount    

Fair Value 

     Carrying Amount   

Fair Value 

F-20 

 
  
  
  
  
  
  
   
 
 
 
 
 
 
 
 
 
  
  
 
    
 
  
 
 
 
6. Dispositions 

Biodefense Assets 

On November 4, 2015, XOMA and Nanotherapeutics Inc. (“Nanotherapeutics”) entered into an asset purchase agreement (the 
“Nanotherapeutics Purchase Agreement”), pursuant to which Nanotherapeutics agreed, subject to the terms and conditions set forth in 
the  Nanotherapeutics  Purchase  Agreement,  to  acquire  XOMA’s  biodefense  business  and  related  assets  (including,  subject  to 
regulatory approval, certain contracts with the U.S. government), and to assume certain liabilities of XOMA (the “Transaction”).  As 
part of the Transaction, the parties  will, subject to the terms and conditions of the asset purchase agreement and the satisfaction of 
certain conditions, enter into an intellectual property license agreement (the “License Agreement”), pursuant to which XOMA agreed 
to license to Nanotherapeutics, subject to the terms and conditions set  forth  in the  License  Agreement, certain intellectual property 
rights related to the purchased assets.  Under the  License  Agreement, the  Company is  eligible to receive  up to $4.5  million of cash 
payments upon Nanotherapeutics’ execution of a contract with the Defense Threat and Reduction Agency. In addition, the Company is 
eligible to receive 15% royalties on net sales of products.  

Manufacturing Facility 

On November 5, 2015, XOMA and Agenus West, LLC, a wholly-owned subsidiary of Agenus Inc. (“Agenus”), entered into an 
asset purchase agreement (the “Agenus Purchase Agreement”), pursuant to which Agenus agreed, subject to the terms and conditions 
set forth in the Agenus Purchase Agreement, to acquire XOMA’s manufacturing facility in Berkeley, California, together with certain 
related assets, including certain intellectual property related to the purchased assets under an intellectual property license agreement, 
and to assume certain liabilities of XOMA, in consideration for the payment to XOMA of up to $5.0 million in cash and the issuance 
to XOMA of shares of Agenus’ common stock having an aggregate value of up to $1.0 million. 

On  December  31,  2015,  XOMA  completed  the  sale  of  the  manufacturing  facility,  including  certain  related  equipment  and 
furniture, and the grant of non-exclusive licenses for certain of its patents and general know-how to Agenus for cash consideration of 
$4.7 million, net of the assumed liabilities of $0.3 million at closing. In addition to the cash consideration, XOMA received 109,211 
shares of common stock of Agenus with an aggregate value of $0.5 million.  The remaining $0.5 million of Agenus common stock 
will only be received  upon the Company’s satisfaction of  certain organizational  matters,  which XOMA  may or  may  not be able to 
satisfy.    Agenus  also  paid  $0.2  million  to  the  Company  as  consideration  for  the  employees  who  would  not  have  otherwise  been 
retained by the Company had the manufacturing facility closed on October 31, 2015. At closing, the carrying value of the assets sold 
was $2.2 million. The Company believes that the assets related to the manufacturing facility and certain other assets sold to Agenus 
include all key inputs and processes necessary to generate output from a market participant’s perspective. Accordingly, the Company 
has determined that such assets qualify as a business. The Company recorded the gain on the sale of a business of $3.5 million in the 
other income (expense), net line of the consolidated statement of comprehensive loss for the year ended December 31, 2015.  

7. Restructuring Charges 

On July 22, 2015, the Company announced the Phase 3 EYEGUARD-B study of gevokizumab in patients with Behçet’s disease 
uveitis,  run  by  Servier,  did  not  meet  the  primary  endpoint  of  time  to  first  acute  ocular  exacerbation.    Due  to  the  results  and  the 
Company’s  belief  they  would  be  predictive  of  results  in  its  other  EYEGUARD  studies,  in  August  2015,  XOMA  announced  its 
intention to end the EYEGUARD global Phase 3 program.  On August 21, 2015, the Company, in connection with its efforts to lower 
operating expenses and preserve capital while continuing to focus on its endocrine product pipeline, implemented a restructuring plan 
(the  “2015  Restructuring”)  that  included  a  workforce  reduction  resulting  in  the  termination  of  38  employees.    The  Company 
terminated an additional five employees on September 29, 2015 and an additional nine employees on October 20, 2015.  

During  the  year  ended  December  31,  2015,  the  Company  recorded  charges  of  $2.9  million  related  to  severance,  other 
termination benefits and outplacement services in connection with the workforce reduction resulting from the 2015 Restructuring. In 
addition,  the  Company  recognized  an  additional  restructuring  charge  of  $0.8  million  in  contract  termination  costs,  which  primarily 
include costs in connection with the discontinuation of the EYEGUARD studies.  

Of the $3.7  million total expenses associated  with the restructuring activities during 2015, the Company paid $3.2 million in 

2015 and expects to pay approximately $0.5 million in 2016. 

F-21 

 
 
 
In  January  2012,  the  Company  implemented  a  streamlining  of  operations,  which  resulted  in  a  restructuring  plan  (the  “2012 
Restructuring”) designed to sharpen its focus on value-creating opportunities led by gevokizumab and its unique antibody discovery 
and development capabilities. The restructuring plan included a reduction of XOMA’s personnel by 84 positions, or 34%. These staff 
reductions  resulted  primarily  from  the  Company’s  decisions  to  utilize  a  contract  manufacturing  organization  for  Phase  3  and 
commercial antibody production, and to eliminate internal research functions that are non-differentiating or that can be obtained cost 
effectively by contract service providers. 

During  the  years  ended  December  31,  2015,  2014  and  2013,  the  Company  incurred  zero,  $0.1  million  and  $0.3  million, 

respectively in restructuring charges related to facility costs resulting from the 2012 Restructuring. 

The outstanding restructuring liabilities are included in accrued and other liabilities on the consolidated balance sheets. As of 

December 31, 2015 and 2014, the components of these liabilities are shown below (in thousands): 

Employee 
Severance
and Other 
Benefits

Contract 
Termination
Costs

Facility 

Charges (1)      

Total 

Balance at December 31, 2013 ................................................   $
Restructuring charges ..............................................................    
Cash payments.........................................................................    
Adjustments .............................................................................    
Balance at December 31, 2014 ................................................    
Restructuring charges ..............................................................    
Cash payments.........................................................................    
Balance at December 31, 2015 ................................................   $

—    $
—     
—     
—     
—     
2,933     
(2,590)    
343    $

—    $ 
—      
—      
—      
—      
766      
(650)     
116    $ 

21     $
84      
(128 )    
23      
—      
—      
—      
—     $

21 
84 
(128)
23 
— 
3,699 
(3,240)
459  

(1) 

Includes moving and relocation costs, and lease payments, net of sublease payments. 

8. Long-Term Debt and Other Financings 

Novartis Note 

In  May  2005,  the  Company  executed  a  secured  note  agreement  (the  “Note  Agreement”)  with  Novartis,  which  was  due  and 
payable in full in June 2015. Under the Note Agreement, the Company borrowed semi-annually to fund up to 75% of the Company’s 
research and development and commercialization costs under its collaboration arrangement with Novartis, not to exceed $50.0 million 
in aggregate principal amount. Interest on the principal amount of the loan accrues at six-month LIBOR plus 2%, which was equal to 
2.81% at December 31, 2015, and is payable semi-annually in June and December of each year. Additionally, the interest rate resets in 
June and December of each  year. At the Company’s election, the  semi-annual interest  payments could be added to the outstanding 
principal amount, in lieu of a cash payment, as long as the aggregate principal amount does not exceed $50.0 million. The Company 
made this election for all interest payments. Accrued interest of $0.3 million, $0.3 million and $0.4 million was added to the principal 
balance  of  the  note  for  the  years  ended  December  31,  2015,  2014  and  2013,  respectively.  Loans  under  the  Note  Agreement  were 
secured by the Company’s interest in its collaboration with Novartis, including any payments owed to it thereunder. Pursuant to the 
terms of the arrangement as restructured in November 2008, the Company did not make any additional borrowings under the Novartis 
note. 

In June 2015, the Company and Novartis Vaccines and Diagnostics, Inc. (“NVDI”), agreed to extend the maturity date of the 

Note Agreement from June 21, 2015, to September 30, 2015 (the “June 2015 Extension Letter”). 

On  September 30, 2015, concurrent  with the execution of the  License  Agreement  with Novartis International as discussed in 
Note 4, XOMA and NVDI executed an amendment to the June 2015 Extension Letter (the “Secured Note Amendment”). Pursuant to 
the Secured Note Amendment, the parties further extended the maturity date of the June 2015 Extension Letter from September 30, 
2015 to September 30, 2020, and eliminated the mandatory prepayment previously required to be made with certain proceeds of pre-
tax  profits  and  royalties.  In  addition,  upon  achievement  of  a  specified  development  and  regulatory  milestone,  the  then-outstanding 
principal amount of the note will be reduced by $7.3 million rather than the Company receiving such amount as a cash payment. All 
other terms of the original Note Agreement remain unchanged.  

Pursuant  to  its  obligations  under  the  collaboration  with  NVDI,  in  January  2014,  the  Company  made  a  payment,  equal  to  25 

percent of a $7.0 million milestone received, or $1.75 million, toward its outstanding debt obligation to NVDI. 

F-22 

 
  
  
 
   
    
     
  
  
 
  
 
  
 
   
    
 
  
 
 
As of December 31, 2015, the outstanding principal balance under this Secured Note Amendment was $13.7 million and was 
included  in  interest  bearing  obligations  –  long  term  in  the  Company’s  consolidated  balance  sheet.  As  of  December  31,  2014,  the 
outstanding principal balance under this arrangement was $13.4 million and was included in interest bearing obligations – current in 
the Company’s consolidated balance sheet.  

Servier Loan Agreement 

In December 2010, in connection  with the  Collaboration  Agreement entered into  with Servier, the Company executed a loan 
agreement with Servier (the “Servier Loan Agreement”), which provided for an advance of up to €15.0 million. The loan was fully 
funded in January 2011, with the proceeds converting to approximately $19.5 million at that time. The loan is secured by an interest in 
XOMA’s intellectual property rights to all gevokizumab indications worldwide, excluding certain rights in the U.S. and Japan. Interest 
is calculated at a floating rate based on a Euro Inter-Bank Offered Rate (“EURIBOR”) and subject to a cap. The interest rate is reset 
semi-annually in January and July of each year. The interest rate for the initial interest period was 3.22% and was reset semi-annually 
ranging from 2.05% to 3.83%. Interest for the six-month period from mid-January 2015 through mid-July 2015 was reset to 2.16%.  
Interest for the six-month period from mid-July 2015 through mid-January 2016 was reset to 2.05%. Interest is payable semi-annually; 
however, the Servier Loan Agreement provides for a deferral of interest payments over a period specified in the agreement. During the 
deferral period, accrued interest will be added to the outstanding principal amount for the purpose of interest calculation for the next 
six-month  interest  period.  On  the  repayment  commencement  date,  all  unpaid  and  accrued  interest  shall  be  paid  to  Servier  and 
thereafter, all accrued and unpaid interest shall be due and payable at the end of each six-month period. In January 2016, the Company 
made payments to Servier of $0.2 million in accrued interest as well as the principal balance due described below. 

On  January  9,  2015,  Servier  and  the  Company  entered  into  Amendment  No.  2  (“Loan  Amendment”)  to  the  Servier  Loan 
Agreement  initially  entered  into  on  December  30,  2010  and  subsequently  amended  by  a  Consent,  Transfer,  Assumption  and 
Amendment  Agreement  entered  into  as  of  August  12,  2013.  The  Loan  Amendment  extended  the  maturity  date  of  the  loan  from 
January 13, 2016 to three tranches of principal to be repaid as follows: €3.0 million on January 15, 2016, €5.0 million on January 15, 
2017, and €7.0 million on January 15, 2018. All other terms of the Servier Loan Agreement remained unchanged. The loan will be 
immediately due and payable upon certain customary events of default. The Company determined that the Loan Amendment resulted 
in a loan modification.   

Upon initial issuance, the loan had a stated interest rate lower than the market rate based on comparable loans held by similar 
companies,  which  represents  additional  value  to  the  Company.  The  Company  recorded  this  additional  value  as  a  discount  to  the 
carrying  value  of  the  loan  amount,  at  its  fair  value  of  $8.9  million.  The  fair  value  of  this  discount,  which  was  determined  using  a 
discounted cash flow model, represents the differential between the stated terms and rates of the loan, and market rates. Based on the 
association of the loan with the collaboration arrangement, the Company recorded the offset to this discount as deferred revenue. 

The loan discount was amortized to interest expense under the effective interest method over the remaining life of the loan. The 
loan discount balance at the time of the Loan Amendment was $1.9 million, which was being amortized over the remaining term of 
the Loan Amendment. The Company recorded non-cash interest expense resulting from the amortization of the loan discount of $0.7 
million, $1.9 million and $1.6 million for the years ended December 31, 2015, 2014 and 2013, respectively. At December 31, 2015 
and 2014, the net carrying value of the loan was $15.3 million and $16.2 million, respectively. For the years ended December 31, 2015 
and 2014, the Company recorded unrealized foreign exchange losses of $0.2 million and $0.3 million, respectively, related to the re-
measurement of the loan discount. For the year ended December 31, 2013, the Company recorded an unrealized foreign exchange gain 
of $0.2 million related to the re-measurement of the loan discount. 

On  September  28,  2015,  Servier  terminated  the  Collaboration  Agreement  with  the  required  180-day  notice  and  none  of  the 
acceleration clauses were triggered; therefore, the termination of the Collaboration Agreement had no impact on the loan balance as of 
December 31, 2015.    

The outstanding principal balance under this loan was $16.4 million and $18.2 million, using a euro to US dollar exchange rate 
of 1.091 and 1.216, as of December 31, 2015 and 2014, respectively. The Company recorded unrealized foreign exchange gains of 
$1.9  million  and  $2.4  million  for  the  years  ended  December  31,  2015  and  2014,  related  to  the  re-measurement  of  the  loan.  The 
Company recognized an unrealized foreign exchange loss  of $0.8 million  for the  year ended December 31, 2013, related to the re-
measurement of the loan. 

General Electric Capital Corporation Term Loan 

In December 2011, the Company entered into a loan agreement (the “GECC Loan Agreement”) with General Electric Capital 
Corporation (“GECC”), under which GECC agreed to make a term loan in an aggregate principal amount of $10.0 million (the “Term 
Loan”) to the Company, and upon execution of the GECC Loan Agreement, GECC funded the Term Loan.  

F-23 

 
In  connection  with  the  GECC  Loan  Agreement,  the  Company  issued  to  GECC  unregistered  warrants  that  entitle  GECC  to 
purchase up to an aggregate of 263,158 unregistered shares of XOMA common stock at an exercise price equal to $1.14 per share. 
These  warrants  are  exercisable  immediately  and  have  a  five-year  term  expiring  in  December  2016.  As  of  December  31,  2015  and 
2014, all of these warrants were outstanding.    

In September 2012, the Company entered into an amendment to the GECC Loan Agreement which provided for an additional 
term  loan  in  the  amount  of  $4.6  million,  increasing  the  term  loan  obligation  to  $12.5  million  (the  “Amended  Term  Loan”)  and 
provided for an interest-only monthly repayment period following the effective date of the amendment through March 1, 2013, at a 
stated interest rate of 10.9% per annum. Thereafter, the Company  was obligated to  make  monthly principal payments of $347,222, 
plus accrued interest, over a 27-month period commencing on April 1, 2013, and through June 15, 2015, at which time the remaining 
outstanding  principal  amount  of  $3.1  million,  plus  accrued  interest,  was  due.  The  Company  incurred  debt  issuance  costs  of 
approximately  $0.2  million  and  was  required  to  make  a  final  payment  fee  in  the  amount  of  $875,000  on  the  date  upon  which  the 
outstanding  principal  amount  was  required  to  be  repaid  in  full.  This  final  payment  fee  replaced  the  original  final  payment  fee  of 
$500,000. The debt issuance costs and final payment fee were being amortized and accreted, respectively, to interest expense over the 
term of the Amended Term Loan using the effective interest method. 

In connection with the amendment, on September 27, 2012 the Company issued to GECC unregistered stock purchase warrants, 
which entitle GECC to purchase up to an aggregate of 39,346 shares of XOMA common stock at an exercise price equal to $3.54 per 
share. These warrants are exercisable immediately and have a five-year term expiring in September 2017. As of December 31, 2015, 
all of these warrants were outstanding. 

The Company allocated the aggregate proceeds of the GECC Term Loan between the warrants and the debt obligation based on 
their relative fair values.  The estimated fair value of the warrants issued to GECC was determined using the Black-Scholes Model. 
The fair value of the warrants with the GECC Loan Agreement and the subsequent September 27, 2012 amendment had estimated fair 
values of $0.2 million and $0.1 million, respectively, and were recorded as a discount to the debt obligation,  which  was amortized 
over  the  term  of  the  loan  using  the  effective  interest  method.  The  warrants  are  classified  in  permanent  equity  on  the  consolidated 
balance sheets. 

The Company may prepay the Amended Term Loan voluntarily in full, but not in part, and any voluntary and certain mandatory 
prepayments were subject to a prepayment premium of 3% in the first year after the effective date of the loan amendment, 2% in the 
second  year and 1% thereafter,  with certain exceptions.  The Company  was also required to pay  the $875,000 final payment  fee in 
connection with any voluntary or mandatory prepayment. On the effective date of the loan amendment, the Company paid an accrued 
final payment fee in the amount of $0.2 million relating to the original final payment fee of $500,000. 

At December 31, 2014, the outstanding principal balance under the Amended Term Loan was $5.2 million.  

The GECC Term Loan was paid in full on February 27, 2015, when Hercules Technology Growth Capital, Inc. (“Hercules”) and 
the  Company  entered  into  a  loan  and  security  agreement  (the  “Hercules  Term  Loan”),  under  which  the  Company  borrowed  $20.0 
million. The Company used a portion of the proceeds under the Hercules Term Loan to repay GECC’s outstanding principle balance, 
final  payment  fee,  prepayment  fee,  and  accrued  interest  totaling  $5.5  million.  A  loss  on  extinguishment  of  $0.4  million  from  the 
payoff of the GECC Term Loan was recognized as interest expense during the year ended December 31, 2015. 

Hercules Term Loan 

On February 27, 2015 (“Closing Date”), the Company entered into the Hercules Term Loan as described above.  The Hercules 
Term Loan has a variable interest rate that is the greater of either (i) 9.40% plus the prime rate as reported from time to time in The 
Wall Street Journal minus 7.25%, or (ii) 9.40%. The payments under the Hercules Term Loan are interest only until one month prior 
to July 1, 2016. The interest-only period will be followed by equal monthly payments of principal and interest amortized over a 30-
month schedule through the scheduled maturity date of September 1, 2018. As security for its obligations under the Hercules Term 
Loan, the  Company  granted a security interest in  substantially all of its existing and after-acquired assets, excluding  its intellectual 
property assets. 

F-24 

 
If  the  Company  prepays  the  loan  prior  to  the  loan  maturity  date,  it  will  pay  Hercules  a  prepayment  charge,  based  on  a 
prepayment fee equal to 3.00% of the amount prepaid, if the prepayment occurs in any of the first 12 months following the Closing 
Date, 2.00% of the amount prepaid, if the prepayment occurs after 12 months from the Closing Date but prior to 24 months from the 
Closing Date, and 1.00% of the amount prepaid if the prepayment occurs after 24 months from the Closing Date. The Hercules Term 
Loan  includes  customary  affirmative  and  restrictive  covenants,  but  does  not  include  any  financial  maintenance  covenants,  and  also 
includes standard events of default, including payment defaults. Upon the occurrence of an event of default, a default interest rate of 
an additional 5% may be applied to the outstanding loan balances, and Hercules may declare all outstanding obligations immediately 
due and payable and take such other actions as set forth in the Hercules Term Loan. 

The Company incurred debt issuance costs of $0.5 million in connection with the Hercules Term Loan. The Company will be 
required to pay a final payment fee equal to $1.2 million on the maturity date, or such earlier date as the term loan is paid in full. The 
debt issuance costs and final payment fee are being amortized and accreted, respectively, to interest expense over the term of the term 
loan using the effective interest method. The Company recorded non-cash interest expense resulting from the amortization of the debt 
issuance costs and accretion of the final payment of $0.5 million for the year ended December 31, 2015. 

In connection with the Hercules Term Loan, the Company issued unregistered warrants that entitle Hercules to purchase up to 
an aggregate of 181,268 unregistered shares of XOMA common stock at an exercise price equal to $3.31 per share. These warrants 
were exercisable immediately and have a five-year term expiring in February 2020. The Company allocated the aggregate proceeds of 
the  Hercules  Term  Loan  between  the  warrants  and  the  debt  obligation. The  fair  value  of  the  warrants  issued  to  Hercules  was 
determined  using  the  Black-Scholes  Model  and  was  estimated  to  be  $0.5  million.  The  estimated  fair  value  of  the  warrants  was 
recorded  as  a  discount  to  the  debt  obligation.    The  debt  discount  is  being  amortized  over  the  term  of  the  loan  using  the  effective 
interest method. The warrants are classified in stockholders’ equity on the consolidated balance sheets. As of December 31, 2015, all 
of these warrants were outstanding. 

The Company evaluated the Hercules Term Loan in accordance with accounting guidance for derivatives and determined there 

was de minimis value to the identified derivative features of the loan at inception and December 31, 2015. 

As of December 31, 2015, the outstanding principal balance of the Hercules Term Loan was $20.0 million. At December 31, 

2015, the net carrying value of the Hercules Term Loan was $ 19.7 million. 

Aggregate  future  principal,  final  fee  payments  and  discounts  of  the  Company’s  total  interest  bearing  obligations  as  of 

December 31, 2015 are as follows (in thousands): 

Year Ended December 31, 
2016 ................................................................................................................................     $ 
2017 ................................................................................................................................       
2018 ................................................................................................................................       
2019 ................................................................................................................................       
2020 ................................................................................................................................       

Less: Interest, final payment fee, discount and issuance cost .........................................       

Less: interest bearing obligations – current ....................................................................       
Interest bearing obligations – non-current ......................................................................     $ 

Amounts 

9,038 
14,677 
17,879 
— 
15,664 
57,258 
(8,591)
48,667 
(5,910)
42,757  

F-25 

 
  
  
 
  
     
  
     
  
Interest Expense 

Amortization  of  debt  issuance  costs  and  discounts  are  included  in  interest  expense.  Interest  expense  in  the  consolidated 
statements of comprehensive loss for the years ended December 31, 2015, 2014, and 2013 relates to the following debt instruments (in 
thousands): 

Hercules loan ...........................................................................   $
Servier loan ..............................................................................  
GECC term loan ......................................................................  
Novartis note ...........................................................................  
Other ........................................................................................  
Total interest expense ..............................................................   $

Year Ended December 31, 
2014 

2015 

2013 

2,223   $
1,083    
548    
329    
11    
4,194   $

—     $ 
2,330       
1,638       
312       
23       
4,303     $ 

— 
2,152 
2,064 
362 
53 
4,631  

9. Income Taxes   

The total income tax benefit consists of the following (in thousands): 

Federal income tax benefit.......................................................   $
Total ...................................................................................   $

—   $
—   $

—     $ 
—     $ 

(14)
(14)

Year Ended December 31, 
2014 

2015 

2013 

The Company has significant losses in 2015, 2014 and 2013 and as such there was no income tax expense for the years ended 

December 31, 2015, 2014, and 2013. The income tax benefit in 2013 relates to federal refundable credits. 

Reconciliation between the tax provision computed at the federal statutory income tax rate of 34% and the Company’s actual 

effective income tax rate is as follows: 

Federal tax at statutory rate......................................................  
Warrant valuation ....................................................................  
Permanent items and other.......................................................  
Valuation allowance ................................................................  
Total ...................................................................................  

Year Ended December 31, 
2014 

2015 

2013 

34%   
29%   
-15%   
-48%   
0%   

34 %     
40 %     
-1 %     
-73 %     
0 %     

34%
-17%
0%
-17%
0%

The significant components of net deferred tax assets as of December 31, 2015 and 2014 were as follows (in thousands): 

Capitalized research and development expenses ......................   $
Net operating loss carryforwards ..............................................  
Research and development and other credit carryforwards ......  
Other .........................................................................................   
Total deferred tax assets ......................................................   
Valuation allowance..................................................................   

Net deferred tax assets .........................................................    $

December 31, 

2015 

50,808    $ 
115,869      
24,268      
18,748      
209,693      
(209,693)     
—    $ 

2014 

50,852  
105,042  
12,108  
22,060  
190,062  
(190,062 )
—   

The net increase (decrease) in the valuation allowance was $19.6 million, $29.9 million, and $(73.9) million for the years ended 

December 31, 2015, 2014, and 2013, respectively. 

F-26 

 
  
  
 
 
  
 
  
    
 
  
 
  
  
 
 
  
 
  
    
 
  
  
  
 
  
  
 
   
  
  
  
  
  
  
 
 
  
 
    
 
  
As of December 31, 2015, the Company had federal net operating loss carry-forwards of approximately $311.5 million and state 
net  operating  loss  carry-forwards  of  approximately  $202.7  million  to  offset  future  taxable  income.  The  net  operating  loss  carry-
forwards include $5.2 million which relates to stock option deductions that will be recognized through additional paid in capital when 
utilized.  As such, these deductions are not reflected in the Company’s deferred tax assets.  No federal net operating loss carry-forward 
expired  in  2015, 2014,  and  2013.  California  net  operating  losses  of  $22.4  million,  $54.3  million,  and  $16.8  million,  expired  in  the 
years 2015, 2014, and 2013, respectively. 

Accounting  standards  provide  for  the  recognition  of  deferred  tax  assets  if  realization  of  such  assets  is  more  likely  than  not.  
Based  upon  the  weight  of  available  evidence,  which  includes  the  Company’s  historical  operating  performance  and  carry-back 
potential, the Company has determined that total deferred tax assets should be fully offset by a valuation allowance. 

Based  on  an  analysis  under  Section  382  of  the  Internal  Revenue  Code  (which  subjects  the  amount  of  pre-change  NOLs  and 
certain other pre-change tax attributes that can be utilized to an annual limitation), the Company experienced ownership changes in 
2009 and 2012 which substantially limit the future use of its pre-change Net Operating Losses (“NOLs”) and certain other pre-change 
tax attributes per year.  The Company has excluded the NOLs and R&D credits that will expire as a result of the annual limitations in 
the  deferred  tax  assets  as  of  December  31,  2015.  To  the  extent  that  the  Company  does  not  utilize  its  carry-forwards  within  the 
applicable statutory carry-forward periods, either because of Section 382 limitations or the lack of sufficient taxable income, the carry-
forwards will expire unused. 

The  Company  files  income  tax  returns  in  the  U.S.  federal  jurisdiction,  State  of  California,  Maryland,  Alabama,  Texas  and 
Ireland.  The  Internal  Revenue  Service  has  completed  an  audit  of  the  Company's  2009  and  2010  federal  income  tax  returns  which 
resulted in no change. The Company’s federal income tax returns for tax years 2012 and beyond remain subject to examination by the 
Internal  Revenue  Service.    The  Company’s  State  and  Irish  income  tax  returns  for  tax  years  2011  and  beyond  remain  subject  to 
examination  by  state  tax  authorities  and  Irish  Revenue  Commissioner.  In  addition,  all  of  the  net  operating  losses  and  research and 
development credit carry-forwards that may be used in future years are still subject to adjustment. 

The following table summarizes the Company's activity related to its unrecognized tax benefits (in thousands): 

Balance at January 1 ................................................................   $
Increase related to current year tax position ............................  
Increase related to prior year tax position ................................  
Balance at December 31 ..........................................................   $

5,503   $
2,687    
1,476    
9,666   $

4,274     $ 
720       
509       
5,503     $ 

4,104 
164 
6 
4,274  

Year Ended December 31, 
2014 

2015 

2013 

As of December 31, 2015, the Company had a total of $8.0 million of net unrecognized tax benefits, none of which would affect 
the effective tax rate upon realization. The Company currently has a full valuation allowance against its U.S. net deferred tax assets 
which would impact the timing of the effective tax rate benefit should any of these uncertain tax positions be favorably settled in the 
future. 

The Company does not expect the unrecognized tax benefits to change significantly over the next twelve months. The Company 
will recognize interest and penalties accrued on any unrecognized tax benefits as a component of income tax expense. As of December 
31, 2015, the Company has not accrued interest or penalties related to uncertain tax positions. 

10. Compensation and Other Benefit Plans 

The  Company  grants  qualified  and  non-qualified  stock  options,  RSUs,  common  stock  and  other  stock-based  awards  under 
various plans to directors, officers, employees and other individuals. Stock options are granted at exercise prices of not less than the 
fair market value of the Company’s common stock on the date of grant. Generally, stock options granted to employees fully vest four 
years from the grant date and expire ten years from the date of the grant or three months from the date of termination of employment 
(longer in case of death or certain retirements). However, certain options granted to employees vest monthly or immediately, certain 
options granted to directors vest monthly over one year or three years and certain options may fully vest upon a change of control of 
the Company or may accelerate based on performance-driven measures. Additionally, the Company has an Employee Stock Purchase 
Plan (“ESPP”) that allows employees to purchase Company shares at a purchase price equal to 85% of the lower of the fair market 
value of the Company’s common stock on the first trading day of the offering period or on the last day of the offering period. 

F-27 

 
  
  
 
 
  
 
  
    
 
  
 
 
Employee Stock Purchase Plan 

Under the ESPP plan approved by the Company’s stockholders in May 1998 (the “1998 ESPP”), the Company is authorized to 
issue up to 233,333 shares of common stock to employees through payroll deductions at a purchase price per share equal to 95% of the 
closing price of XOMA shares on the exercise date. An employee may elect to have payroll deductions made under the 1998 ESPP for 
the purchase of shares in an amount not to exceed 15% of the employee’s compensation. 

In May 2015, the Company’s stockholders approved the Employee Stock Purchase Plan (the “2015 ESPP”) which replaced the 
1998 ESPP. Under the 2015 ESPP, the Company reserved 300,000 shares of common stock for issuance as of its effective date of July 
1, 2015, subject to adjustment in the event of a stock split, stock dividend, combination or reclassification or similar event. The 2015 
ESPP allows eligible employees to purchase shares of the Company’s common stock at a discount through payroll deductions of up to 
10% of their eligible compensation, subject to any plan limitations. The 2015 ESPP provides for six-month offering periods ending on 
May  31  and  November  30  of  each  year,  with  the  exception  of  the  first  offering  period,  which  lasts  from  July  1,  2015  through 
November 30, 2015, as the Company transition from the Company’s legacy employee stock purchase plan. At the end of each offering 
period, employees are able to purchase shares at 85% of the lower of the fair market value of the Company’s common stock on the 
first trading day of the offering period or on the last day of the offering period. 

During  the  years  ended  December  31,  2015,  2014,  and  2013,  employees  purchased  120,595,  17,702,  and  15,262  shares  of 
common  stock,  respectively,  under  the  ESPP  plans.  Net  payroll  deductions  under  1998  ESPP  and  2015  ESPP  totaled  $170,000, 
$74,000, and $60,000 for the years ended December 31, 2015, 2014, and 2013, respectively. 

Deferred Savings Plan 

Under  section  401(k)  of  the  Internal  Revenue  Code  of  1986,  the  Board  of  Directors  adopted,  effective  June  1,  1987,  a  tax-
qualified deferred compensation plan for employees of the Company. Participants may make contributions which defer up to 50% of 
their eligible compensation per payroll period, up to a maximum for 2015 of $18,000 (or $24,000 for employees over 50 years of age) 
and  for  2014  of  $17,500  (or  $23,000  for  employees  over  50  years  of  age).  The  Company  may,  at  its  sole  discretion,  make 
contributions each plan year, in cash or in shares of the Company’s common stock, in amounts which match up to 50% of the salary 
deferred by the participants. The expense related to these contributions was $0.8 million, $1.0 million, and $0.9 million for the years 
ended December 31, 2015, 2014, and 2013, respectively, and 100% was paid in common stock in each year. 

Stock Option Plans 

In May 2010, the Compensation Committee and the full Board adopted, and in July 2010 the Company’s stockholders approved, 
a  new  equity-based  compensation  plan,  the  2010  Long  Term  Incentive  and  Share  Award  Plan,  which  has  since  been  amended  and 
restated as the Amended and Restated 2010 Long Term Incentive and Stock Award Plan (the “Long Term Incentive Plan”). The Long 
Term Incentive Plan is intended to consolidate the Company’s long-term incentive compensation under a single plan, by replacing the 
Option  Plan,  the  Restricted  Plan  and  the  1992  Directors  Share  Option  Plan  (the  “Directors  Plan”)  going  forward,  and  to  provide a 
more current set of terms pursuant to which to provide this type of compensation. In May 2014, the Company’s stockholders approved 
an amendment to the Company’s Long Term Incentive Plan to (a) increase the number of shares of common stock issuable over the 
term of the plan by an additional 5,350,000 to 18,771,206 shares  in the aggregate and (b) provide that, for each stock appreciation 
right,  restricted  share,  restricted  stock  unit,  performance  share,  performance  unit,  dividend  equivalent  or  other  stock-based  award 
issued, the number of available shares under the plan will be reduced by 1.18 shares. 

The Long Term Incentive Plan grants stock options, RSUs, and other stock-based awards to eligible employees, consultants and 
directors. No further  grants or awards  will be  made  under  the Option Plan, the  Restricted Share Plan or the Directors Plan. Shares 
underlying  options  previously  issued  under  the  Option  Plan,  the  Restricted  Share  Plan  or  the  Directors  Plan  that  are  currently 
outstanding will, upon forfeiture, cancellation, surrender or other termination, become available under the Long Term Incentive Plan. 
Stock-based awards granted under the Long Term Incentive Plan may be exercised when vested and generally expire ten years from 
the date of the grant or three to six months from the date of termination of employment (longer in case of death or certain retirements). 
Vesting periods vary based on awards granted, however, certain stock-based awards may vest immediately or may accelerate based on 
performance-driven measures. 

As of December 31, 2015, the Company had 3,935,778 shares available for grant under the stock option plans. As of December 

31, 2015, options and RSUs covering 10,148,543 shares of common stock were outstanding under the stock option plans. 

F-28 

 
Stock Options 

The stock options vest monthly over four years for employees and one year for directors. Stock options held by employees who 
qualify for retirement age (defined as employees that are a minimum of 55 years of  age and the sum of their age plus years of full-
time employment with the Company exceeds 70 years) vest  on the earlier of scheduled vest date or the date of retirement. 

Stock Option Plans Summary 

The following table summarizes the Company’s stock option activity: 

2015 

2014 

2013 

Outstanding at beginning of year ................................  
Granted ........................................................................  
Exercised .....................................................................  
Forfeited, expired or cancelled ....................................  
Outstanding at end of year ..........................................  
Exercisable at end of year ...........................................  
Weighted-average grant-date fair value ......................  

Weighted
Average 
Exercise 
Price 
Per Share   

Weighted 
Average 
Exercise 
Price 

Per Share      

Number of 
shares

Number of 
shares

8.15     7,216,041    $
3.78     1,891,989   
1.89     (915,911)  
12.51     (489,810)  
6.33     7,702,309     
6.93     4,908,925    $
    $
2.60    

8.42       6,788,383    $
6.69       1,168,203   
3.91        (589,355)  
14.36        (151,190)  
8.15       7,216,041     
9.98       4,814,926    $
    $
4.49       

Weighted
Average 
Exercise 
Price 
Per Share  
8.99 
3.13 
2.26 
17.46 
8.42 
11.14 
2.27  

Number of 
shares
7,702,309   $
1,797,222  
(163,663)  
(1,645,571)  
7,690,297  
5,604,615   $
  $

The  aggregate  intrinsic  value  of  stock  options  exercised  in  2015,  2014,  and  2013  was  $0.4  million,  $2.9  million,  and  $1.7 

million, respectively.  

As  of  December  31,  2015,  there  were  7,486,402  stock  options  vested  and  expected  to  vest  with  a  weighted  average  exercise 
price per share of $6.37, aggregate intrinsic value of $13,000, and a weighted average remaining contractual term of 6.3 years. As of 
December  31,  2015,  there  were  5,604,615  stock  options  exercisable  with  an  aggregate  intrinsic  value  of  $10,000  and  a  weighted 
average remaining contractual term of 5.7 years. 

As of December 31, 2015, $4.8 million of total unrecognized compensation expense related to stock options is expected to be 

recognized over a weighted average period of 2.2 years. 

Restricted Stock Units 

RSUs generally vest over three years for employees and one year for directors.  In 2015, the Company granted certain RSUs 
with a one-year vesting period.  RSUs held by employees who qualify for retirement age (defined as employees that are a minimum of 
55 years of  age and the sum of their age plus years of full-time employment with the Company exceeds 70 years) vest on the earlier 
of scheduled vest date or the date of retirement. 

Unvested RSU activity for the year ended December 31, 2015 is summarized below: 

Unvested balance at January 1, 2015 ........................................  
Granted .....................................................................................  
Vested .......................................................................................  
Forfeited ....................................................................................  
Unvested balance at December 31, 2015 ..................................  

  Number of 

     Weighted- 
     Average Grant- 
     Date Fair Value 
5.46 
3.25 
4.64 
4.48 
4.07   

Shares 
1,953,879   $ 
2,113,432   
(1,184,147)  
(757,403)  
2,125,761   $ 

The  total  grant-date  fair  value  of  RSUs  that  vested  in  2015,  2014  and 2013  was  $5.5 million,  $3.9  million  and  $1.6  million, 
respectively.  As  of  December  31,  2015,  $4.9  million  of  total  unrecognized  compensation  expense  related  to  employee  RSUs  was 
expected to be recognized over a weighted average period of 1.5 years. 

F-29 

 
  
  
 
  
    
 
  
 
   
   
   
  
  
   
 
  
  
  
 
 
 
 
  
Stock-based Compensation Expense 

The fair value of stock options granted during the years ended December 31, 2015, 2014, and 2013, was estimated based on the 

following weighted average assumptions for: 

Dividend yield .........................................................................  
Expected volatility ...................................................................  
Risk-free interest rate ...............................................................  
Expected term ..........................................................................  

Year Ended December 31, 
2014 

2015 

2013 

0%   
84%   
1.40%   

0 %     
92 %     
1.72 %     

5.6 years

5.6 years 

0%
92%
0.89%
5.6 years  

The  following  table  shows  total  stock-based  compensation  expense  for  stock  options,  RSUs  and  ESPP  in  the  consolidated 

statements of comprehensive loss (in thousands): 

Research and development ......................................................   $
Selling, general and administrative ..........................................  
Total stock-based compensation expense ................................   $

5,022   $
4,705    
9,727   $

5,557     $ 
5,215       
10,772     $ 

2,358 
2,741 
5,099  

Year Ended December 31, 
2014 

2015 

2013 

11. Net Loss per Share of Common Stock 

Potentially dilutive securities are excluded from the calculation of diluted net loss per share of common stock if their inclusion is 

anti-dilutive.  

The following table shows the weighted-average outstanding securities considered anti-dilutive and therefore excluded from the 

computation of diluted net loss per share (in thousands): 

Common stock options and RSUs ...........................................  
Warrants for common stock.....................................................  
Total .........................................................................................  

Year Ended December 31, 
2014 

2015 

2013 

11,011    
19,210    
30,221    

6,666       
2,073       
8,739       

7,087 
15,839 
22,926  

The following is a reconciliation of the numerators and denominators used in calculating basic and diluted net loss per share of 

common stock (in thousands): 

Numerator 
Net loss ....................................................................................   $
Basic 

Adjustment for revaluation of contingent warrant 
   liabilities ..........................................................................  
Diluted .....................................................................................   $

Denominator 
Weighted average shares outstanding used for basic net 
   loss per share ........................................................................  
Effect of dilutive warrants .......................................................  
Weighted average shares outstanding and dilutive 
   securities used for diluted net loss per share .........................  

Year Ended December 31, 
2014 

2015 

2013 

(20,606)  $

(38,301 )   $ 

(124,058)

—    
(20,606)  $

(39,512 )     
(77,813 )   $ 

— 
(124,058)

117,803    
—    

107,435       
7,898       

86,938 
— 

117,803    

115,333       

86,938  

F-30 

 
  
  
 
  
  
 
   
  
  
  
 
     
  
  
 
 
  
 
  
    
 
  
 
  
  
 
 
  
 
  
    
 
  
  
  
 
 
  
 
  
    
 
 
   
       
 
 
   
       
 
  
 
   
       
 
 
   
       
 
 
 
12. Capital Stock 

Registered Direct Offerings 

On  December  8,  2014,  the  Company  completed  a  registered  direct  offering  of  8,097,165  shares  of  its  common  stock,  and 
accompanying warrants to purchase one share of common stock for each share purchased at an offering price of $4.94 per share to 
certain institutional investors. Total gross proceeds from the offering were approximately $40.0 million before deducting underwriting 
discounts, commissions and estimated offering expenses totaling approximately $2.3 million. The warrants, which represent the right 
to acquire up to an aggregate of 8,097,165 shares of common stock, are exercisable immediately, have a two-year term and an exercise 
price of $7.90 per share. As of December 31, 2015, all of these warrants were outstanding. 

Underwritten Offerings 

On  August  23,  2013,  the  Company  completed  an  underwritten  public  offering  of  8,736,187  shares  of  its  common  stock, 
including 1,139,502 shares of its common stock that were issued upon the exercise of the underwriters’ 30-day over-allotment option, 
at  a  public  offering  price  of  $3.62  per  share.  Total  gross  proceeds  from  the  offering  were  approximately  $31.6  million,  before 
deducting underwriting discounts and commissions and estimated offering expenses totaling approximately $2.2 million. 

On  December  18,  2013,  the  Company  completed  an  underwritten  public  offering  of  10,925,000  shares  of  its  common  stock, 
including 1,425,000 shares of its common stock that were issued upon the exercise of the underwriters’ 30-day over-allotment option, 
at  a  public  offering  price  of  $5.25  per  share.  Total  gross  proceeds  from  the  offering  were  approximately  $57.4  million,  before 
deducting underwriting discounts and commissions and estimated offering expenses totaling approximately $3.8 million. 

ATM Agreements 

On February 4, 2011, the Company entered into an At Market Issuance Sales Agreement (the “2011 ATM Agreement”), with 
McNicoll,  Lewis  &  Vlak  LLC  (now  known  as  MLV  &  Co.  LLC).    From  the  inception  of  the  2011  ATM  Agreement  through 
December 31, 2012, the Company sold a total of 7,572,327 shares of common stock under this agreement for aggregate gross proceeds 
of $14.6 million.  No shares of common stock have been sold under this agreement since February 3, 2012. Total offering expenses 
incurred related to sales under the 2011 ATM Agreement from inception to December 31, 2012, were $0.5 million. As of December 
31, 2014, the 2011 ATM Agreement expired. 

On November 12, 2015, the Company entered into an At Market Issuance Sales Agreement (the “2015 ATM Agreement”) with 
Cowen and Company, LLC (“Cowen”), under which the Company may offer and sell from time to time at its sole discretion shares of 
its  common  stock  through  Cowen  as  its  sales  agent,  in  an  aggregate  amount  not  to  exceed  the  amount  that  can  be  sold  under  the 
Company’s registration statement on Form S-3 (File No. 333-201882) filed with the SEC on the same date. Cowen may sell the shares 
by  any  method  permitted  by  law  deemed  to  be  an  “at  the  market”  offering  as  defined  in  Rule  415  of  the  Securities  Act,  including 
without  limitation  sales  made  directly  on  The  NASDAQ  Global  Market,  on  any  other  existing  trading  market  for  the  Company’s 
common stock or to or through a  market  maker. Cowen also  may sell the shares in privately negotiated transactions, subject to the 
Company’s prior approval.  The Company will pay Cowen a commission equal to 3% of the gross proceeds of the sales price of all 
shares sold through it as sales agent under the 2015 ATM Agreement. For the year ended December 31, 2015, no shares of common 
stock have been sold under this agreement. 

Common Stock Warrants 

As of December 31, 2015 and 2014, the following common stock warrants were outstanding (in thousands, except for per share 

amounts): 

Issuance Date 

   Expiration Date 

February 2010 ........    February 2015 
December 2011 ......    December 2016 
March 2012 ............    March 2017 
September 2012 ......    September 2017 
December 2014 ......    December 2016 
February 2015 ........    February 2020 

   Balance Sheet Classification 
 Contingent warrant liabilities   $
 Stockholders' equity 
  $
  Contingent warrant liabilities   $
  Stockholders' equity 
  $
  Contingent warrant liabilities   $
  $
  Stockholders' equity 

10.50      
1.14      
1.76      
3.54      
7.90      
3.31      

  Exercise Price     
per Share 

Number of Shares at  
December 31, 

2015 

2014 

—      
263      
9,585      
39      
8,097      
181      
18,165      

1,260 
263 
12,109 
39 
8,097 
— 
21,768  

F-31 

 
 
  
    
    
 
 
   
    
 
  
    
    
   
      
In February 2015, the Company issued Hercules five-year warrants in connection with the Hercules Term Loan (see Note 8) that 
entitle Hercules to purchase up to an aggregate of 181,268 unregistered shares of XOMA’s common stock at an exercise price equal to 
$3.31 per share. The warrants are classified in stockholders’ (deficit) equity on the consolidated balance sheets. As of December 31, 
2015, all of these warrants were outstanding. 

In December 2014, in connection with a registered direct offering to select institutional investors, the Company issued two-year 
warrants to purchase up to an aggregate of 8,097,165 shares of XOMA’s common stock at an exercise price of $7.90 per share. These 
warrants  contain  provisions  that  are  contingent  on  the  occurrence  of  a  change  in  control,  which  could  conditionally  obligate  the 
Company to repurchase the warrants for cash in an amount equal to their estimated fair value using the Black-Scholes Model on the 
date of such change in control. Due to these provisions, the Company accounts for the warrants issued in December 2014 as a liability 
at estimated fair value. In addition, the estimated fair value of the liability related to the warrants is revalued at each reporting period 
until  the  earlier  of  the  exercise  of  the  warrants,  at  which  time  the  liability  will  be  reclassified  to  stockholders’  equity  at  its  then 
estimated  fair  value,  or  expiration  of  the  warrants.  On  December  8,  2014,  the  date  of  issuance,  the  fair  value  of  the  warrants  was 
estimated to be $10.3 million using the Black-Scholes Model. The Company revalued the warrants at December 31, 2015 using the 
Black-Scholes  Model,  and  recorded  a  $2.2  million  reduction  in  the  estimated  fair  value  as  a  gain  on  the  revaluation  of  contingent 
warrant liabilities line of the Company’s consolidated statement of comprehensive loss. The decrease in the estimated fair value of the 
warrants  is  primarily  due  to  the  decrease  in  the  market  price  of  XOMA’s  common  stock  at  December  31,  2015  as  compared  to 
December  31,  2014.  As  of  December  31,  2015  and  2014,  8,097,165  of  these  warrants  were  outstanding  and  had  an  estimated  fair 
value of $3.0 million and $5.2 million, respectively. 

In  September  2012,  the  Company  issued  to  GECC  five-year  warrants  in  connection  with  the  amendment  to  the  GECC  Loan 
Agreement (see Note 8) that entitle GECC to purchase up to an aggregate of 39,346 unregistered shares of XOMA’s common stock at 
an exercise price equal to $3.54 per share. The warrants are classified in stockholders’ equity on the consolidated balance sheets. As of 
December 31, 2015 and 2014, all of these warrants were outstanding. 

In  March  2012,  in  connection  with  an  underwritten  offering,  the  Company  issued  five-year  warrants  to  purchase  14,834,577 
shares of XOMA’s common stock at an exercise price of $1.76 per share. These warrants contain provisions that are contingent on the 
occurrence of a change in control, which could conditionally obligate the Company to repurchase the warrants for cash in an amount 
equal to their estimated fair value using the Black-Scholes Model on the date of such change in control. Due to these provisions, the 
Company accounts for the warrants issued in March 2012 as a liability at estimated fair value. In addition, the estimated fair value of 
the liability related to the warrants is revalued at each reporting period until the earlier of the exercise of the warrants, at which time 
the liability will be reclassified to stockholders' equity at its then estimated fair value, or expiration of the warrants. During the year 
ended  December  31,  2015,  warrants  to  purchase  2,524,265  of  common  stock  were  exercised,  of  which  2,523,515  were  cashless 
exercises, resulting in an issuance of 1,410,474 shares of common stock. The Company revalued the warrants immediately prior to the 
exercise  dates  and  recognized  $2.2  million  as  a  gain  on  the  revaluation  of  contingent  warrant  liabilities  line  of  the  Company’s 
consolidated statement of comprehensive loss. The estimated fair value of the exercised warrants of $3.6 million was reclassified from 
contingent warrant liabilities to stockholders’ (deficit) equity on the consolidated balance sheet. The Company revalued the remaining 
warrants at December 31, 2015 using the Black-Scholes Model and recorded a $13.4 million reduction in the estimated fair value as a 
gain  on  the  revaluation  of  contingent  warrant  liabilities  line  of  the  Company’s  consolidated  statement  of  comprehensive  loss.  The 
decrease in the estimated fair value of the warrants is primarily due to the decrease in the market price of XOMA’s common stock at 
December 31, 2015 compared to December 31, 2014. As of December 31, 2015 and 2014, 9,585,153 and 12,109,418, respectively, of 
these warrants were outstanding and had an estimated fair value of $7.5 million and $26.7 million, respectively. 

In  December  2011,  the  Company  issued  to  GECC  five-year  warrants  in  connection  with  a  loan  agreement  (see  Note  8)  that 
entitle GECC to purchase up to an aggregate of 263,158 unregistered shares of XOMA’s common stock at an exercise price equal to 
$1.14 per share. The warrants are classified in stockholders’ equity on the consolidated balance sheets. As of December 31, 2015 and 
2014, all of these warrants were outstanding. 

In February 2010, in connection with an underwritten offering, the Company issued five-year warrants to purchase 1,260,000 
shares of XOMA’s common stock at an exercise price of $10.50 per share. The warrants contained provisions that were contingent on 
the  occurrence  of  a  change  in  control,  which  could  conditionally  obligate  the  Company  to  repurchase  the  warrants  for  cash  in  an 
amount  equal  to  their  estimated  fair  value  using  the  Black-Scholes  Model  on  the  date  of  such  change  in  control.  Due  to  these 
provisions, the Company accounted for the  warrants as liabilities at their estimated fair value.  As of December 31, 2014, all of the 
warrants were outstanding and the estimated fair value was de minimis. All of these warrants expired unexercised in February 2015. 

F-32 

 
In June 2009, the Company issued warrants to certain institutional investors as part of a registered direct offering. The warrants 
represented the right to acquire an aggregate of up to 347,826 shares of XOMA’s common stock over a five year period beginning 
December 11, 2009 at an exercise price of $19.50 per share. The warrants contained provisions that were contingent on the occurrence 
of a change in control, which could conditionally obligate the Company to repurchase the warrants for cash in an amount equal to their 
estimated  fair  value  using  the  Black-Scholes  Model  on  the  date  of  such  change  in  control.  Due  to  these  provisions,  the  Company 
accounted  for  the  warrants  as  liabilities  at  their  estimated  fair  value.  As  of  December  31,  2014,  all  of  these  warrants  had  expired 
unexercised. 

13.  Legal Proceedings, Commitments and Contingencies 

Collaborative Agreements, Royalties and Milestone Payments 

The Company has committed to make potential future milestone payments to third parties as part of licensing and development 
programs.  Payments  under  these  agreements  become  due  and  payable  only  upon  the  achievement  by  the  Company  of  certain 
developmental, regulatory and/or commercial milestones. Because it is uncertain if and when these milestones will be achieved, such 
contingencies,  aggregating  up  to  $57.7  million  (assuming  one  product  per  contract  meets  all  milestones  events)  have  not  been 
recorded  on  the  accompanying  consolidated  balance  sheets.  The  Company  is  unable  to  determine  precisely  when  and  if  payment 
obligations under the agreements  will become due as these obligations are based on  milestone events, the achievement of  which  is 
subject to a significant number of risks and uncertainties. 

Legal Proceedings 

On  July  24,  2015,  a  purported  securities  class  action  lawsuit  was  filed  in  the  United  States  District  Court  for  the  Northern 
District  of  California,  captioned  Markette  v.  XOMA  Corp.,  et  al.  (Case  No.  3:15-cv-3425-HSG)  against  the  Company,  its  Chief 
Executive  Officer  and  its  Chief  Medical  Officer.   The  complaint  asserts  that  all  defendants  violated  Section  10(b)  of the  Securities 
Exchange Act of 1934, as amended (the “Exchange Act”), and SEC Rule 10b-5, by making materially false or misleading statements 
regarding the Company’s EYEGUARD-B study between November 6, 2014 and July 21, 2015. The plaintiff also alleges that Messrs. 
Varian  and  Rubin  violated  Section  20(a)  of  the  Exchange  Act.   The  plaintiff  seeks  class  certification,  an  award  of  unspecified 
compensatory damages, an award of reasonable costs and expenses, including attorneys’ fees, and other further relief as the Court may 
deem just and proper. The Company is awaiting the appointment of a lead plaintiff by the Court. Based on a review of the allegations, 
the Company believes that the plaintiff’s allegations are without merit, and intends to vigorously defend against the claims. Currently, 
the Company does not believe that the outcome of this matter will have a material adverse effect on its business or financial condition, 
although an unfavorable outcome could have a material adverse effect on its results of operations for the period in which such a loss is 
recognized. The Company cannot reasonably estimate the possible loss or range of loss that may arise from this lawsuit. 

On October 1, 2015, a stockholder purporting to act on  the behalf of the Company,  filed a derivative lawsuit in the Superior 
Court of California for the County of Alameda, purportedly asserting claims on behalf of the Company against certain of officers and 
the members of board of directors of the Company, captioned Silva v. Scannon, et al. (Case No. RG15787990).  The lawsuit asserts 
claims  for  breach  of  fiduciary  duty,  corporate  waste  and  unjust  enrichment  based  on  the  dissemination  of  allegedly  false  and 
misleading statements related to the Company’s EYEGUARD-B study.  The plaintiff is seeking unspecified monetary damages and 
other  relief,  including  reforms  and  improvements  to  the  Company’s  corporate  governance  and  internal  procedures.   This  action  is 
currently stayed pending further developments in the securities class action. Management believes the allegations have no merit and 
intends to vigorously defend against the claims. Currently, the Company does not believe that the outcome of this matter will have a 
material adverse effect on its business or financial condition, although an unfavorable outcome could have a material adverse effect on 
its results of operations for the period in which such a loss is recognized. The Company cannot reasonably estimate the possible loss 
or range of loss that may arise from this lawsuit. 

On  November  16,  and  November  25,  2015,  two  derivative  lawsuits  were  filed  purportedly  on  the  Company’s  behalf  in  the 
United States District Court for the Northern District of California, captioned Fieser v. Van Ness, et al. (Case No. 4:15-CV-05236-
HSG)  and  Csoka  v.  Varian,  et  al.  (Case  No.  3:15-cv-05429-SI),  against  certain  of  the  Company’s  officers  and  the  members  of  its 
board of directors.  The lawsuits assert claims for breach of fiduciary duty and other violations of law based on the dissemination of 
allegedly  false  and  misleading  statements  related  to  the  Company’s  EYEGUARD-B  study.  Plaintiffs  seek  unspecified  monetary 
damages and other relief including reforms and improvements to the Company’s corporate governance and internal procedures. The 
Company’s response to the Fieser complaint is currently due on April 4, 2016. The Company’s response to the Csoka Complaint is 
currently  due  on  April  18,  2016.  Management  believes  the  allegations  have  no  merit  and  intend  to  vigorously  defend  against  the 
claims.  Currently, the Company does not believe that the outcome of this matter will have a material adverse effect on its business or 
financial condition, although an unfavorable outcome could have a material adverse effect on its results of operations for the period in 
which such a loss is recognized. The Company cannot reasonably estimate the possible loss or range of loss that may arise from this 
lawsuit. 

F-33 

 
 
 
Operating Leases 

As of December 31, 2015, the Company leased administrative, research facilities, and office equipment under operating leases 
expiring on various dates through April 2023. These leases require the Company to pay taxes, insurance, maintenance and minimum 
lease payments. For each facility lease, the Company has two successive renewal options to extend the lease for five years upon the 
expiration of the initial lease term, or the expiration of the first renewal lease term.  

The  Company  estimates  future  minimum  lease  payments,  excluding  sub-lease  income  as  of  December  31,  2015  to  be  (in 

thousands): 

Year Ended December 31, 
2016...............................................................................................  $
2017...............................................................................................   
2018...............................................................................................   
2019...............................................................................................   
2020...............................................................................................   
Thereafter ......................................................................................   
Total minimum lease payments ...............................................  $

Amounts 

3,631   
3,732   
3,842   
3,956   
4,060   
6,794   
26,015   

Total rental expense, including other costs required under the Company’s leases, was approximately $3.7 million, $3.5 million 
and $3.5 million for the years ended December 31, 2015, 2014, and 2013, respectively. Rental expense based on leases allowing for 
escalated  rent  payments  are  recognized  on  a  straight-line  basis.  At  the  expiration  of  the  lease,  the  Company  is  required  to  restore 
certain of its leased property to certain conditions in place at the time of lease inception. The Company believes these costs will not be 
material to its operations. 

On December 31, 2015, in conjunction with the closing of the Agenus Purchase Agreement, the Company entered into sublease 
agreements  with  Agenus  for  portions  of  two  leased  buildings  through  December  31,  2016.  The  terms  of  the  sublease  agreements 
commenced on December 31, 2015 and will expire on December 31, 2016, subject to early termination by Agenus. Under the terms of 
the agreements, the Company will receive an aggregate of $0.3 million over the sublease term.   

Capital Leases 

During the year ended December 31, 2015, the Company has entered into capital lease agreements for certain network hardware 
and  equipment  for  use  by  the  Company  and  its  employees.  The  lease  term  is  for  three  years.  The  current  portion  of  capital  lease 
obligations  is  included  in  the  accrued  and  other  liabilities  line  and  the  noncurrent  capital  lease  obligations  is  included  in  other 
liabilities – long term line in the consolidated balance sheet as of December 31, 2015. 

The following is a schedule of future minimum lease payments due under the capital lease obligation as of December 31, 2015 

(in thousands): 

Year Ended December 31, 
2016..............................................................................................   $
2017..............................................................................................    
2018..............................................................................................    
Total capital lease obligations .................................................    
Less: amount representing interest ...............................................    
Present value of net minimum capital lease payments ...........    
Less: current portion ....................................................................    
Total noncurrent capital lease obligations ..............................   $

Amounts 

131   
116   
72   
319   
(37 ) 
282   
(109 ) 
173   

14.  Concentration of Risk, Segment and Geographic Information 

Concentration of Risk 

Cash  equivalents,  marketable  securities,  and  receivables  are  financial  instruments  which  potentially  subject  the  Company  to 
concentrations of credit risk, as well as liquidity risk for certain cash equivalents such as money market funds. The Company has not 
encountered such issues during 2015. The Company’s policy is to focus on investments with high credit quality and liquidity to limit 
the amount of credit exposure. The Company currently maintains a portfolio of cash equivalents and have not experienced any losses. 

F-34 

 
  
 
  
  
  
 
  
  
 
The Company has not experienced any significant credit losses and does not generally require collateral on receivables. For the 
year  ended  December  31,  2015,  one  customer  represented  67%  of  total  revenue,  and  as  of  December  31,  2015,  four  customers 
represented 39%, 25%, 18% and 10% of the accounts receivable balance. 

For the  year ended December 31, 2014, two customers represented 51% and 28% of total revenues, and as of December 31, 

2014, three customers represented 44%, 34% and 12% of the accounts receivable balance. 

For the year ended December 31, 2013, three customers represented 43%, 26%, and 20% of total revenues. 

Segment Information 

The Company has determined that it operates in one business segment as it only reports operating results on an aggregate basis 

to the chief operating decision maker of the Company. The Company’s property and equipment is held primarily in the United States. 

Geographic Information 

Revenue attributed to the following geographic regions for the years ended December 31, 2015, 2014, and 2013 was as follows 

(in thousands): 

United States ............................................................................   $
Europe .....................................................................................  
Asia Pacific ..............................................................................  
Total .........................................................................................   $

10,685   $
44,662    
100    
55,447   $

11,756     $ 
5,510       
1,600       
18,866     $ 

19,955 
15,396 
100 
35,451  

Year Ended December 31, 
2014 

2015 

2013 

15. Subsequent Events  

The Company has evaluated, for potential recognition and disclosure, events that occurred from the balance sheet date through 

March 9th, 2016, the date the financial statements were available to be issued. 

F-35 

 
  
  
 
 
  
 
  
    
 
 
 
 
 
16. Quarterly Financial Information (unaudited) 

The following is a summary of the quarterly results of operations for the years ended December 31, 2015 and 2014: 

Consolidated Statements of Operations 
Quarter Ended 

  March 31 

June 30 

     September 30      December 31  

(In thousands, except per share amounts) 

2015 
Total revenues (1) .....................................................................   $
Restructuring costs ..................................................................    
Operating costs and expenses ..................................................    
(Loss) income from operations ................................................    
Other income (expense), net (2) ................................................    
Net (loss) income ....................................................................   $
Basic net (loss) income per share of common stock ................   $
Diluted net (loss) income per share of common stock (3) ........   $

2014 
Total revenues .........................................................................   $
Restructuring costs ..................................................................    
Operating costs and expenses (4) ..............................................    
Loss from operations ...............................................................    
Other income (expense), net (2) ................................................    
Net loss ....................................................................................   $
Basic net loss per share of common stock ...............................   $
Diluted net loss  per share of common stock ...........................   $

2,651    $
—     
(25,224)    
(22,573)    
855     
(21,718)   $
(0.19)   $
(0.19)   $

3,410    $
(84)    
(26,800)    
(23,474)    
18,787     
(4,687)   $
(0.04)   $
(0.21)   $

2,539    $ 
—      
(24,752)     
(22,213)     
(1,546)     
(23,759)   $ 
(0.20)   $ 
(0.20)   $ 

2,074     $
(2,561 )    
(23,191 )    
(23,678 )    
23,198      
(480 )   $
(0.00 )   $
(0.00 )   $

5,973    $ 
—      
(24,750)     
(18,777)     
6,880      
(11,897)   $ 
(0.11)   $ 
(0.17)   $ 

5,136     $
—      
(25,589 )    
(20,453 )    
6,054      
(14,399 )   $
(0.13 )   $
(0.17 )   $

48,183 
(1,138)
(18,305)
28,740 
(3,389)
25,351 
0.21 
0.21 

4,347 
— 
(23,475)
(19,128)
11,810 
(7,318)
(0.07)
(0.12)

(1) 

In  the  fourth  quarter  of  2015,  the  total  revenues  include  upfront  and  milestone  payments  relating  to  various  out-licensing 
arrangements,  including  a  $37.0  million  upfront  payment  from  Novartis,  a  $5.0  million  upfront  payment  from  Novo  Nordisk 
and a $3.8 million payment from Pfizer.   

(2)  Fluctuations in 2015 and 2014 primarily relate to (losses) gains on the revaluation of the contingent warrant liabilities and a $3.5 
million gain from the sale of the Company’s manufacturing facility during the three months ended December 31, 2015 (see Note 
6). 

(3)  For  the  quarter  ended  December  31,  2015,  the  Company’s  diluted  net  income  per  share  of  common  stock  was  computed  by 

(4) 

giving effect to all potentially dilutive common stock equivalents outstanding during the period. 
In 2014, the Company corrected an immaterial error driven by certain stock-based compensation expense in the fourth quarter of 
2014, resulting in a decrease to operating expenses and net loss by $1.6 million and a decrease to basic and diluted loss per share 
of $0.01 and $0.02, respectively, for the three months ended December 31, 2014.  

F-36 

 
  
  
 
 
  
 
 
  
   
  
 
 
   
     
      
      
 
  
   
     
      
      
 
   
     
      
      
 
  
 
 
Exhibit 
Number 

Exhibit Description 

Form 

SEC File No.    Exhibit 

Filing Date 

Incorporation By Reference 

    3.1 

 Certificate of Incorporation of XOMA Corporation 

8-K 

000-14710   

3.1 

01/03/2012 

8-K 

000-14710   

3.1 

05/31/2012 

    3.2A 

Certificate of Amendment of Certificate of Incorporation of 
XOMA Corporation 

    3.2B 

Certificate of Amendment of Certificate of Incorporation of 
XOMA Corporation 

    3.3 

 By-laws of XOMA Corporation 

    4.1 

 Reference is made to Exhibits 3.1, 3.2 and 3.3 

    4.2 

 Specimen of Common Stock Certificate 

    4.3 

 Form of Warrant (December 2011 Warrants) 

    4.4 

 Form of Warrant (March 2012 Warrants) 

8-K 

000-14710   

8-K 

000-14710   

8-K 

000-14710   

10-K 

000-14710   

8-K 

000-14710   

3.1 

3.2 

4.1 

4.9 

4.1 

    4.5 

 Form of Warrant (September 2012 Warrants) 

8-K 

000-14710   

4.10 

    4.6 

Registration Rights Agreement, dated June 12, 2014, by and among 
XOMA Corporation, 667, L.P., Baker Brothers Life Sciences, L.P., 
and 14159, L.P. 

    4.7 

 Form of Warrants (December 2014 Warrants) 

8-K 

000-14710   

8-K 

000-14710   

4.1 

4.1 

    4.8 

Warrant Agreement, by and between XOMA Corporation and 
Hercules Technology III, L.P., dated February 27, 2015 

10-Q 

000-14710   

4.10 

  10.1* 

 1981 Share Option Plan as amended and restated 

S-8 

333-171429  

10.1 

05/28/2014 

01/03/2012 

01/03/2012 

03/14/2012 

03/07/2012 

10/03/2012 

06/12/2014 

12/09/2014 

05/07/2015 

12/27/2010 

  10.2* 

 Form of Share Option Agreement for 1981 Share Option Plan 

10-K 

000-14710    10.1A 

03/11/2008 

  10.3* 

 Restricted Share Plan as amended and restated 

S-8 

333-171429  

10.1 

12/27/2010 

  10.4* 

 Form of Share Option Agreement for Restricted Share Plan 

10-K 

000-14710    10.2A 

03/11/2008 

  10.5* 

 2007 CEO Share Option Plan 

8-K 

000-14710   

10.7 

  10.6* 

 1992 Directors Share Option Plan as amended and restated 

S-8 

333-171429  

10.1 

08/07/2007 

12/27/2010 

  10.7* 

Form of Share Option Agreement for 1992 Directors Share Option 
Plan (initial grants) 

10-K 

000-14710    10.3A 

03/11/2008 

  10.8* 

Form of Share Option Agreement for 1992 Directors Share Option 
Plan (subsequent grants) 

10-K 

000-14710    10.3B 

03/11/2008 

  10.9* 

 2002 Director Share Option Plan 

S-8 

333-151416  

10.10 

06/04/2008 

  10.10* 

XOMA Corporation Amended and Restated 2010 Long Term 
Incentive and Stock Award Plan 

S-8 

000-14710   

99.1 

09/12/2014 

  10.11* 

Form of Stock Option Agreement for Amended and Restated 2010 
Long Term Incentive and Stock Award Plan 

10-K 

000-14710    10.6A 

03/14/2012 

  10.12* 

Form of Restricted Stock Unit Agreement for Amended and 
Restated 2010 Long Term Incentive and Stock Award Plan 

  10.13* 

Management Incentive Compensation Plan as amended and 
restated 

10-K 

000-14710    10.6B 

03/14/2012 

8-K 

000-14710   

10.3 

11/06/2007 

  10.14* 

 CEO Incentive Compensation Plan 

10-K 

000-14710    10.4A 

03/11/2008 

 
 
 
 
  
 
  
  
  
 
  
  
  
 
  
  
  
  
 
  
 
  
  
  
  
  
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
  
  
    
 
  
 
  
  
  
  
  
  
  
 
  
  
  
  
    
 
  
 
  
  
  
  
  
  
 
  
 
 
 
 
 
 
  
  
    
 
  
 
  
  
  
  
  
  
  
    
 
  
 
  
  
  
  
  
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
  
  
    
 
  
 
  
  
  
  
  
  
  
    
 
  
 
  
  
  
  
  
  
  
    
 
  
 
  
  
  
  
  
  
  
    
 
  
 
  
  
  
  
  
  
  
    
 
  
 
  
  
  
  
  
  
  
    
 
  
 
  
  
  
  
  
 
  
 
  
 
 
 
 
 
 
 
  
  
    
 
  
 
  
  
  
  
  
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
 
  
 
 
 
 
 
 
  
  
    
 
  
 
  
  
  
  
  
Exhibit 
Number 

Exhibit Description 

Form 

SEC File No.    Exhibit 

Filing Date 

Incorporation By Reference 

  10.15* 

 Amendment No. 1 to CEO Incentive Compensation Plan 

10-K 

000-14710    10.7B 

03/14/2012 

  10.16* 

 Bonus Compensation Plan 

10-K 

000-14710    10.4B 

03/11/2008 

  10.17 

Form of Amended and Restated Indemnification Agreement for 
Officers 

10-K 

000-14710   

10.6 

03/08/2007 

  10.18 

Form of Amended and Restated Indemnification Agreement for 
Employee Directors 

10-K 

000-14710   

10.7 

03/08/2007 

  10.19 

Form of Amended and Restated Indemnification Agreement for 
Non-employee Directors 

10-K 

000-14710   

10.8 

03/08/2007 

  10.20* 

Employment Agreement entered into between XOMA (US) LLC 
and Fred Kurland, dated as of December 29, 2008 

10-K/A 000-14710    10.7B 

12/27/2010 

  10.21* 

Amended and Restated Employment Agreement entered into 
between XOMA (US) LLC and Charles C. Wells, dated as of 
December 30, 2008 

10-K/A 000-14710    10.7D 

12/27/2010 

  10.22* 

Officer Employment Agreement dated March 19, 2013 between 
XOMA Corporation and Paul Rubin 

10-K 

000-14710   

10.23  

 03/12/3014 

  10.23* 

Employment Agreement effective as of January 4, 2012 between 
XOMA (US) LLC and John Varian 

10-K 

000-14710    10.10G 

03/14/2012 

  10.24* 

Officer Employment Agreement dated March 10, 2014 between 
XOMA Corporation and Pat Scannon 

10-K 

000-14710   

10.25  

03/12/2014 

  10.25* 

Change of Control Agreement entered into between XOMA Ltd. 
and John Varian, dated January 4, 2012 

10-K 

000-14710    10.12A 

03/14/2012 

  10.26* 

Retention Benefit Agreement entered into between XOMA 
Corporation and John Varian, dated March 11, 2014 

 10-K 

 000-14710   

10.28  

03/12/2014 

  10.27* 

Employment Agreement by and between XOMA Corporation and 
Thomas Burns, dated as of April 3, 2015 

  10.28* 

 2015 Employee Stock Purchase Plan 

10-Q 

000-14710   

10.4 

S-8 

333-204367  

99.1 

05/07/2015 

05/21/2015 

  10.29* 

Form of Subscription Agreement and Authorization of Deduction 
under the 2015 Employee Stock Purchase Plan 

S-8 

333-204367  

99.2 

05/21/2015 

  10.30+* 

  10.31+* 

  10.32+* 

Change of Control and Severance Agreement entered into between 
XOMA Corporation and Thomas Burns, dated October 28, 2015 

Change of Control Agreement entered into between XOMA 
Corporation and Jim Neal, dated January 3, 2011 

Employment Agreement entered into between XOMA Corporation 
and Jim Neal, dated October 29, 2014 

  10.33 

Lease of premises at 804 Heinz Street, Berkeley, California dated 
February 13, 2013 

 10-K 

 000-14710   

 10.29 

03/12/2014 

  10.34 

Lease of premises at 2910 Seventh Street, Berkeley, California 
dated February 13, 2013 

 10-K 

 000-14710   

 10.30 

03/12/2014 

  10.35 

First amendment to lease of premises at 2910 Seventh Street, 
Berkeley, California dated February 22, 2013 

 10-K 

 000-14710   

 10.31 

03/12/2014 

 
 
 
 
  
 
  
  
  
 
  
  
  
 
  
  
  
  
 
  
 
  
  
  
  
  
  
  
    
 
  
 
  
  
  
  
  
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
 
  
 
 
 
 
 
 
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
 
  
 
 
 
 
 
 
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
 
 
  
 
 
 
 
 
 
  
 
  
 
 
 
 
 
 
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
Exhibit 
Number 

  10.36 

Exhibit Description 

Form 

SEC File No.    Exhibit 

Filing Date 

Lease of premises at 5860 and 5864 Hollis Street, Emeryville, 
California dated February 13, 2013 

 10-K 

 000-14710   

 10.32 

03/12/2014 

Incorporation By Reference 

  10.37† 

License Agreement by and between XOMA Ireland Limited and 
MorphoSys AG, dated as of February 1, 2002 

10-K 

000-14710   

10.43 

02/01/2002 

  10.38† 

License Agreement, dated as of December 29, 2003, by and 
between Diversa Corporation (n/k/a BP Biofuels Advanced 
Technology Inc.) and XOMA Ireland Limited 

  10.39 

First Amendment, dated October 28, 2014, to the License 
Agreement between XOMA (US) LLC (assigned to it by XOMA 
Ireland Limited) and BP Biofuels Advanced Technology Inc. 
(previously Diversa Corporation, previously Verenium 
Corporation). 

  10.40† 

GSSM License Agreement, effective as of May 2, 2008, by and 
between Verenium Corporation (n/k/a BP Biofuels Advanced 
Technology Inc.) and XOMA Ireland Limited 

8-K/A 000-14710   

2 

03/19/2004 

10-Q 

000-14710   

10.3 

11/06/2014 

10-K 

000-14710    10.25A 

03/10/2011 

  10.41† 

Secured Note Agreement, dated as of May 26, 2005, by and 
between Chiron Corporation and XOMA (US) LLC 

10-Q 

000-14710   

10.3 

08/08/2005 

  10.42† 

  10.43† 

Amended and Restated Research, Development and 
Commercialization Agreement, executed November 7, 2008, by 
and between Novartis Vaccines and Diagnostics, Inc. (formerly 
Chiron Corporation) and XOMA (US) LLC 

Amendment No. 1 to Amended and Restated Research, 
Development and Commercialization Agreement, effective as of 
April 30, 2010, by and between Novartis Vaccines and Diagnostics, 
Inc. and XOMA (US) LLC 

10-K 

000-14710    10.24C 

03/11/2009 

10-K 

000-14710    10.25B 

03/14/2012 

  10.44† 

Collaboration Agreement, dated as of November 1, 2006, between  
Takeda Pharmaceutical Company Limited and XOMA (US) LLC 

10-K 

000-14710   

10.46 

03/08/2007 

  10.45 

  10.46 

First Amendment to Collaboration Agreement, effective as of 
February 28, 2007, between Takeda Pharmaceutical Company 
Limited and XOMA (US) LLC 

Second Amendment to Collaboration Agreement, effective as of 
February 9, 2009, among Takeda Pharmaceutical Company 
Limited and XOMA (US) LLC 

10-Q/A 000-14710   

10.48 

03/05/2010 

10-K 

000-14710    10.31B 

03/11/2009 

  10.47† 

License Agreement, effective as of August 27, 2007, by and 
between Pfizer Inc. and XOMA Ireland Limited 

8-K 

000-14710   

2 

09/13/2007 

  10.48† 

Discovery Collaboration Agreement dated September 9, 2009, by 
and between XOMA Development Corporation and Arana 
Therapeutics Limited 

  10.49† 

Collaboration and License Agreement dated as of December 30, 
2010, by and between XOMA Ireland Limited, Les Laboratoires 
Servier and Institut de Recherches Servier 

  10.50† 

Amended and Restated Collaboration and License Agreement dated 
as of February 14, 2012, by and between XOMA Ireland Limited, 
Les Laboratoires Servier and Institut de Recherches Servier 

10-Q/A 000-14710   

10.35 

03/05/2010 

10-K 

000-14710   

10.42 

03/10/2011 

10-K 

000-14710    10.41A 

03/14/2012 

 
 
 
 
  
 
  
  
  
 
  
  
  
 
  
  
  
  
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
 
  
 
 
 
 
 
 
 
  
 
  
 
 
 
 
 
 
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
Exhibit 
Number 

  10.51† 

  10.52† 

  10.53† 

  10.54† 

  10.55 

  10.56 

  10.57 

Exhibit Description 

Form 

SEC File No.    Exhibit 

Filing Date 

Loan Agreement dated as of December 30, 2010, by and between 
XOMA Ireland Limited and Les Laboratoires Servier 

10-K/A 000-14710    10.42A 

05/26/2011 

Incorporation By Reference 

Amended and Restated License and Commercialization Agreement 
effective as of January 11, 2012, by and between Les Laboratoires 
Servier and XOMA Ireland Limited 

Amendment No. 2, effective January 9, 2015, to the Loan 
Agreement, effective December 30, 2010, by and among XOMA 
(US) LLC, Les Laboratoires Servier and Institut de Recherches 
Servier 
Amendment No. 2, effective January 9, 2015, to the Amended and 
Restated Collaboration and License Agreement, effective February 
14, 2012, by and among XOMA (US) LLC, Les Laboratoires 
Servier and Institut de Recherches Servier 

Amendment No. 1, effective November 4, 2014, to the Amended 
and Restated Collaboration and License Agreement, effective 
February 14, 2012, by and among XOMA (US) LLC (assigned 
from XOMA Ireland Limited), Les Laboratoires Servier and 
Institut de Recherches Servier 

Amendment No. 1 (Consent, Transfer, Assumption and 
Amendment), effective January 9, 2015, to the Loan Agreement, 
effective December 30, 2010, by and among XOMA (US) LLC, 
Les Laboratoires Servier and Institut de Recherches Servier 

Loan and Security Agreement, dated February 27, 2015, by and 
among XOMA Corporation, XOMA(US) LLC and XOMA 
Commercial as borrowers and Hercules Technology Growth 
Capital, Inc., as agent and lender 

10-K 

000-14710   

10.44 

03/14/2012 

10-K 

 000-14710   

10.71 

03/11/2015 

10-K 

000-14710   

10.72  

03/11/2015 

10-K 

000-14710   

10.73 

 03/11/2015 

10-K 

000-14710   

10.74 

 03/11/2015 

10-Q 

000-14710   

10.3 

05/07/2015 

  10.58 

Letter Agreement, dated June 19, 2015, by and between XOMA 
(US) LLC and Novartis Vaccines and Diagnostics, Inc. 

10-Q 

000-14710   

10.1 

08/10/2015 

  10.59† 

License Agreement, dated September 30, 2015, by and between 
XOMA (US) LLC and Novartis Institutes for Biomedical Research, 
Inc. 

  10.60 

Amended Secured Note Agreement, dated September 30, 2015, by 
and between XOMA (US) LLC and Novartis Institutes for 
Biomedical Research, Inc. 

  10.61† 

Amendment to Amended and Restated Research, Development and 
Commercialization Agreement, dated September 30, 2015, by and 
between XOMA (US) LLC and Novartis Institutes for Biomedical 
Research, Inc. 

  10.62 

Sales Agreement, dated November 12, 2015, by and between 
XOMA Corporation and Cowen and company, LLC 

  10.63+† 

  10.64+ 

License Agreement, dated December 1, 2015, by and between 
XOMA (US) LLC and Novo Nordisk A/S 

Settlement and Amended License Agreement dated December 3, 
2015, by and between XOMA (US) LLC, as a successor-in-interest 
of XOMA Ireland Limited and Pfizer Inc.  

10-Q 

000-14710   

10.2 

11/06/2015 

10-Q 

000-14710   

10.3 

11/06/2015 

10-Q 

000-14710   

10.4 

11/06/2015 

8-K 

001-14710   

10.1 

11/12/2015 

 
 
 
 
  
 
  
  
  
 
  
  
  
 
  
  
  
  
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
    
 
  
 
  
  
  
  
  
 
  
  
   
 
  
 
  
  
  
  
  
 
 
  
   
 
  
 
  
  
  
  
  
 
 
  
   
 
  
 
  
  
  
  
  
 
 
  
   
 
  
 
  
  
  
  
  
 
 
  
   
 
  
 
  
  
  
  
  
 
 
 
 
 
 
 
  
   
 
  
 
  
  
  
  
  
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
Exhibit 
Number 

  10.65+† 

  21.1+ 

  23.1+ 

  24.1+ 

  31.1+ 

  31.2+ 

  32.1+ 

Exhibit Description 

Form 

SEC File No.    Exhibit 

Filing Date 

Incorporation By Reference 

Asset Purchase Agreement dated November 5, 2015 by and 
between the Company and Agenus West, LLC 

 Subsidiaries of the Company 

 Consent of Independent Registered Public Accounting Firm 

 Power of Attorney (included on the signature pages hereto) 

Certification of Chief Executive Officer, as required by Rule 13a-
14(a) or Rule 15d-14(a) 

Certification of Chief Financial Officer, as required by Rule 13a-
14(a) or Rule 15d-14(a) 

Certification of Chief Executive Officer and Chief Financial 
Officer, as required by Rule 13a-14(b) or Rule 15d-14(b) and 
Section 1350 of Chapter 63 of Title 18 of the United States Code 
(18 U.S.C. §1350)(1) 

  99.1+ 

 Press Release dated March 9, 2016 

101.INS+   XBRL Instance Document 

101.SCH+  XBRL Taxonomy Extension Schema Document 

101.CAL
+ 

XBRL Taxonomy Extension Calculation Linkbase Document 

101.DEF+  XBRL Taxonomy Extension Definition Linkbase Document 

101.LAB
+ 

XBRL Taxonomy Extension Labels Linkbase Document 

101.PRE+  XBRL Taxonomy Extension Presentation Linkbase Document 

† 

Confidential treatment has been granted with respect to certain portions of this exhibit. This exhibit omits the information 
subject to this confidentiality request. Omitted portions have been filed separately with the SEC. 
Indicates a management contract or compensation plan or arrangement. 
Filed herewith 

* 
+ 
(1)  This certification accompanies the Form 10-K to which it relates, is not deemed filed with the Securities and Exchange 

Commission and is not to be incorporated by reference into any filing of the Registrant under the Securities Act of 1933, as 
amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of the Form 10-K), 
irrespective of any general incorporation language contained in such filing. 

 
 
 
 
  
 
  
  
  
 
  
  
  
 
  
  
  
  
 
  
 
  
  
  
  
  
 
 
 
 
 
 
 
  
   
 
  
 
  
  
  
  
  
  
  
 
  
  
  
  
    
 
  
 
  
  
  
  
  
  
  
 
  
  
  
  
    
 
  
 
  
  
  
  
  
  
  
 
  
  
  
  
    
 
  
 
  
  
  
  
  
 
  
  
 
  
  
  
  
    
 
  
 
  
  
  
  
  
 
  
  
 
  
  
  
 
  
 
 
 
 
 
 
 
  
  
 
  
  
  
  
    
 
  
 
  
  
  
  
  
  
  
 
  
  
  
  
    
 
  
 
  
  
  
  
  
  
  
 
  
  
  
  
    
 
  
 
  
  
  
  
  
  
  
 
  
  
  
  
    
 
  
 
  
  
  
  
  
 
  
  
 
  
  
  
  
    
 
  
 
  
  
  
  
  
  
  
 
  
  
  
  
    
 
  
 
  
  
  
  
  
 
  
  
 
  
  
  
  
    
 
  
 
  
  
  
  
  
  
  
 
  
  
  
  
 
 
Subsidiaries of the Company 
XOMA Ireland Limited 
XOMA Technology Ltd. 
XOMA (US) LLC 
XOMA Commercial LLC 
XOMA CDRA LLC 
XOMA UK Limited 

  Jurisdiction of Organization 
  Ireland 
  Bermuda 
  Delaware 
  Delaware 
  Delaware 
  United Kingdom 

Exhibit 21.1 

 
 
  
 
 
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 

We consent to the incorporation by reference in the Registration Statements on Form S-8 of XOMA Corporation (Nos. 333-108306, 
333-151416, 333-171429, 333-174730, 333-181849 and 333-198719) pertaining to the 1981 Share Option Plan, the Restricted Share 
Plan, the 1992 Directors Share Option Plan, the Amended and Restated 1998 Employee Stock Purchase Plan, the 2007 CEO Share 
Option Plan and the Amended and Restated 2010 Long Term Incentive and Stock Award Plan and in the Registration Statement on 
Form  S-3  of  XOMA  Corporation  (Nos.  333-183486,  333-191078,  333-196707  and  333-201882)  and  the  related  Prospectuses  of 
XOMA Corporation, of our reports dated March 9, 2016, with respect to the consolidated financial statements of XOMA Corporation, 
and the effectiveness of internal control over financial reporting of XOMA Corporation included in this Annual Report (Form 10-K) 
for the year ended December 31, 2015. 

Exhibit 23.1 

/s/   ERNST & YOUNG LLP 
Redwood City, California 
March 9, 2016 

 
 
  
 
 
CERTIFICATION 

Exhibit 31.1 

I, John Varian, certify that: 

1. 

2. 

3. 

4. 

I have reviewed this annual report on Form 10-K of XOMA Corporation; 

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  officers  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))) for the registrant and we have: 

a)  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; 

b)  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. 

c) 

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 

d)  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  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  officers  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 registrant’s board of directors (or persons performing 
the equivalent function): 

a)  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 

b)  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: March 9, 2016 

/s/    JOHN VARIAN 
John Varian 
Chief Executive Officer 

 
 
  
 
 
 
 
 
 
 
CERTIFICATION 

Exhibit 31.2 

I, Thomas Burns, certify that: 

1. 

2. 

3. 

4. 

I have reviewed this annual report on Form 10-K of XOMA Corporation; 

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  officers  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))) for the registrant and we have: 

a)  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; 

b)  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. 

c) 

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 

d)  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  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  officers  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 registrant’s board of directors (or persons performing 
the equivalent function): 

a)  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 

b)  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:  March 9, 2016 

/s/    THOMAS BURNS 
Thomas Burns 
Vice President, Finance and Chief Financial Officer 

 
 
  
 
 
 
 
 
 
 
CERTIFICATION 

Exhibit 32.1 

Pursuant to the requirement set forth in Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended, (the “Exchange Act”) 
and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. §1350), John Varian,  Chief Executive Officer of 
XOMA Corporation (the “Company”), and Thomas Burns, Chief Financial Officer of the Company, each hereby certifies that, to the 
best of his or her knowledge: 

1. 
as Exhibit 32.1, fully complies with the requirements of Section 13(a) or Section 15(d) of the Exchange Act; and 

The Company’s Annual Report on Form 10-K for the year ended December 31, 2015, to which this Certification is attached 

2. 
operations of the Company. 

The  information  contained  in  Exhibit  32.1  fairly  presents,  in  all  material  respects,  the  financial  condition  and  results  of 

IN WITNESS WHEREOF, the undersigned have set their hands hereto as of the 9th day of March, 2016. 

/s/    JOHN VARIAN 
John Varian 
Chief Executive Officer 

/s/    THOMAS BURNS 
Thomas Burns 
Vice President, Finance, and Chief Financial Officer 

3. 
This  certification  accompanies  the  Form  10-K  to  which  it  relates,  is  not  deemed  filed  with  the  Securities  and  Exchange 
Commission and is  not to be  incorporated by reference into any filing of XOMA  Corporation under the Securities  Act of 1933, as 
amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of the Form 10-K), irrespective 
of any general incorporation language contained in such filing. 

 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
C O R P O R A T E   I N F O R M A T I O N

DIRECTORS

EXECUTIVE OFFICERS

ANNUAL MEETING

W. Denman Van Ness 1,2,3
Chairman of the Board
Hidden Hill Advisors

William K. Bowes, Jr. 3
Founding Partner
U.S. Venture Partners

Peter Barton Hutt 3
Senior Counsel
Covington & Burling LLP

John Varian 
Chief Executive Officer

Patrick J. Scannon, M.D., Ph.D.
Executive Vice President and  
Chief Scientific Officer

Paul D. Rubin, M.D.
Senior Vice President,  
Research and Development and  
Chief Medical Officer

Joseph M. Limber 2
President and Chief Executive Officer
Gradalis, Inc.

Thomas Burns
Vice President, Finance and
Chief Financial Officer 

XOMA CORPORATION
2910 Seventh Street
Berkeley, CA 94710
Tel: (510) 204-7200
www.xoma.com

INDEPENDENT AUDITORS

Ernst & Young LLP
San Francisco, CA

TRANSFER AGENT AND 
REGISTRAR

Wells Fargo Shareowner Services
P.O. Box 64874
St. Paul, MN 55164
www.shareowneronline.com
Tel: (800) 468-9716 or  
(651) 450-4064

Patrick J. Scannon, M.D., Ph.D.
Executive Vice President and  
Chief Scientific Officer
XOMA Corporation

John Varian 
Chief Executive Officer
XOMA Corporation

Timothy P. Walbert 1,3
Chairman, President and
Chief Executive Officer
Horizon Pharma, Inc.

Jack L. Wyszomierski 1,2
Former Executive Vice
President and Chief Financial Officer
VWR International, LLC

1  Audit Committee

2  Compensation Committee

3 Nominating & Governance 

Committee

The annual meeting of shareholders 
will be held at 9:00 a.m. on May 19, 
2016 at the company’s offices at 2910 
Seventh Street, Berkeley, CA

SOURCES OF INFORMATION

XOMA’s website, with news releases, 
financial and other information, is 
accessible on the internet at:  
www.xoma.com

SEC FORM 10-K

A copy of XOMA’s annual report filed 
with the Securities and Exchange 
Commission on Form 10-K was made 
available to all shareholders of record 
and is available on XOMA’s website.  
To request a copy contact:

Investor Relations
XOMA Corporation
2910 Seventh Street
Berkeley, CA 94710
Tel: (510) 204-7200
investorrelations@xoma.com

XOMA is an affirmative action,  
equal-opportunity employer.

XOMA CORPORATION

2910 Seventh Street

Berkeley, CA 94710

(510) 204-7200