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Vaccinex, Inc.XOMA CORP FORM 10-K (Annual Report) Filed 03/16/17 for the Period Ending 12/31/16 Address Telephone CIK Symbol SIC Code Industry 2910 SEVENTH ST BERKELEY, CA 94710 5106441170 0000791908 XOMA 2834 - Pharmaceutical Preparations Biotechnology & Medical Research Sector Healthcare Fiscal Year 12/31 http://www.edgar-online.com © Copyright 2017, EDGAR Online, Inc. All Rights Reserved. Distribution and use of this document restricted under EDGAR Online, Inc. Terms of Use. UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549 FORM 10-K ☒☒ANNUAL REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the fiscal year ended December 31, 2016OR☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from toCommission File No. 0-14710 XOMA CORPORATION(Exact name of registrant as specified in its charter) Delaware 52-2154066(State or other jurisdictionof incorporation or organization) (I.R.S. Employer Identification No.) 2910 Seventh Street, Berkeley,California 94710 (510) 204-7200 (Address of principal executive offices,including zip code) (Telephone number)Securities registered pursuant to Section 12(b) of the Act: Title of each className of each exchange on which registeredCommon Stock, $0.0075 par valuePreferred Stock Purchase RightsThe 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 ☐ No ☒Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. Yes ☐ No ☒Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during thepreceding 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 90days. Yes ☒ No ☐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 besubmitted 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 suchfiles). Yes ☒ No ☐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 ofregistrant’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. ☒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 ☐ Accelerated Filer ☒ Non-Accelerated Filer ☐ Smaller reporting company ☐Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act of 1934). Yes ☐ No ☒The aggregate market value of voting common equity held by non-affiliates of the registrant is $64,718,498 as of June 30, 2016.Number of shares of Common Stock outstanding as of March 14, 2017: 7,544,076DOCUMENTS INCORPORATED BY REFERENCE:Portions of the Company’s Proxy Statement for the Company’s 2017 Annual General Meeting of Stockholders are incorporated by reference into Part III of this Report. XOMA Corporation2016 FORM 10-K ANNUAL REPORTTABLE OF CONTENTS PART I Item 1.Business1Item 1A.Risk Factors13Item 1B.Unresolved Staff Comments31Item 2.Properties31Item 3.Legal Proceedings31Item 4.Mine Safety Disclosures31 PART II Item 5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities32Item 6.Selected Financial Data34Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations35Item 7A.Quantitative and Qualitative Disclosures about Market Risk47Item 8.Financial Statements and Supplementary Data48Item 9.Changes in and Disagreements With Accountants on Accounting and Financial Disclosure48Item 9A.Controls and Procedures49Item 9B.Other Information49 PART III Item 10.Directors, Executive Officers, and Corporate Governance51Item 11.Executive Compensation51Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters51Item 13.Certain Relationships and Related Transactions, and Director Independence51Item 14.Principal Accountant Fees and Services51 PART IV Item 15.Exhibits and Financial Statement Schedules52Item 16.Form 10-K Summary52SIGNATURES53INDEX TO FINANCIAL STATEMENTSF-1INDEX 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 otherXOMA product and service names are registered or unregistered trademarks of XOMA Corporation or a subsidiary of XOMA Corporation in the United States andin other selected countries. All trademarks, service marks and trade names included or incorporated by reference in this annual report are the property of theirrespective owners. PART ICertain statements contained herein related to the anticipated size of clinical trials, the anticipated timing of initiation of clinical trials, the expected availability ofclinical trial results, the results of clinical trials, the timing of any application for regulatory approval of our product candidates by the FDA or other regulatoryauthority, the sufficiency of our cash resources, the estimated costs of clinical trials and the amounts of certain revenues and certain costs in comparison to prioryears, 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 ofthe Securities Exchange Act of 1934, as amended (the “Exchange Act”). All statements, other than statements of historical fact are statements that could be deemedforward 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 proveaccurate. Actual results could differ materially from those anticipated due to certain risks inherent in the biotechnology industry and for companies engaged in thedevelopment of new products in a regulated market. Among other things: our product candidates are still being developed, and we will require substantial funds tocontinue development which may not be available; we have received negative results from certain of our clinical trials, and we face uncertain results of otherclinical trials of our product candidates; if our therapeutic product candidates do not receive regulatory approval, neither our third-party licensees, our contractmanufacturers 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 orphandrug exclusivity even if we obtain such exclusivity; even once approved, a product may be subject to additional testing or significant marketing restrictions, itsapproval 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 ourdevelopment efforts; we are subject to various state and federal healthcare related laws and regulations that may impact the commercialization of our productcandidates and could subject us to significant fines and penalties; and certain of our technologies are in-licensed from third parties, so our capabilities using themare restricted and subject to additional risks. These and other risks, including those related to current economic and financial market conditions, are containedprincipally in Item 1, Business; Item 1A, Risk Factors; Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations; and othersections 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 wellas 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 weremade. These cautionary statements should be considered in connection with any written or oral forward-looking statements that we may issue in the future. We donot 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.BusinessOverviewXOMA Corporation (“XOMA”), a Delaware corporation, has an established history of discovering and developing innovative therapeutics derived from itsunique platform of antibody technologies. We typically have sought to license these therapeutic assets to our licensees who take on the responsibilities of later stagedevelopment, approval and commercialization. In addition, we have licensed our antibody technologies on a non-exclusive basis to other companies who desire toaccess this platform for their own discovery efforts.We are evolving our strategy to be focused on developing or acquiring revenue-generating assets and coupling them with a lean corporate infrastructure.Our goal is to create a sustainably profitable business and generate meaningful value for our stockholders. Since our business model is based on the goal of out-licensing to other pharmaceutical companies for them to commercialize and market any resultant products, we expect a significant portion of our future revenuewill be based on payments we may receive from our licensees.We have a portfolio of product candidates, programs, and technologies that are the subject of licenses we have in place with pharmaceutical and biotechcompanies including Novartis International Pharmaceutical Ltd. (“Novartis”), Novo Nordisk A/S (“Novo Nordisk”), Takeda Pharmaceutical Company Ltd.(“Takeda”), Johnson & Johnson, Five Prime Therapeutics, Inc. (“Five Prime”), and Alexion Pharmaceuticals, Inc. There are over 20 such programs that are fundedby other companies and could produce milestone payments and royalty payments in the future.1 Our asset base includes antibodies with unique properties including several that interact at allosteric sites on a specific protein rather than the orthosteric, oractive, sites. These compounds are designed to either enhance or diminish the target protein’s activity as desired. We believe allosteric-modulating antibodies maybe more selective or offer a safety advantage in certain disease indications when compared to more traditi onal modes of action.In February 2017, we achieved initial proof-of-concept (“POC”) with our first-in-class X358 clinical program for patients with hypoglycemia due tocongenital hyperinsulinism (“CHI”) and patients with hypoglycemia post bariatric surgery (“PBS”). These two indications are rare conditions with very fewtherapeutic options. Consistent with the strategy outlined above, it is our intention to maximize the value of X358 for shareholders through a licensing agreement,either now or after continued investment to increase its value to a prospective partner. We believe this approach will expedite potential patient access for those inneed of new treatment options in hyperinsulinemic hypoglycemia.OrganizationWe were incorporated in Delaware in 1981 and became a Bermuda-exempted company in December 1998. Effective December 31, 2011, we changed ourjurisdiction of incorporation from Bermuda to Delaware and changed our name from XOMA Ltd. to XOMA Corporation. When referring to a time or period beforeDecember 31, 1998 or after December 31, 2011, the terms “Company” and “XOMA” refer to XOMA Corporation, a Delaware corporation; when referring to atime or period between December 31, 1998 and December 31, 2011, such terms refer to XOMA Ltd., a Bermuda company.Our principal executive offices are located at 2910 Seventh Street, Berkeley, California 94710, and we maintain a registered office located at CorporationTrust Center, 1209 Orange Street, Wilmington, Delaware 19801. Our telephone number at our principal executive offices is (510) 204-7200. Our website address iswww.xoma.com.Business StrategyWe have traditionally specialized in the discovery and development of innovative antibody-based therapeutics. In 2016, we dedicated our research anddevelopment efforts to advancing our portfolio of product candidates that have the potential to treat a variety of endocrine diseases, including advancing thedevelopment of X358 in CHI and PBS studies. We have recently refined our business strategy to prioritize out-licensing of our internally developed productcandidates while reducing further internal expenditures for research and development.Our business model is designed to create value for stockholders by assembling a diversified portfolio of biotech and pharmaceutical revenue streams andoperating that business with an efficient and low corporate cost structure. Our goal is to become a sustainably profitable company that offers investors anopportunity to participate in the promise of the biotech industry in a diversified, lower-risk business investment than a typical biotech. Our business model is basedon the concept of out-licensing product candidates that we have developed internally and partnering with other pharmaceutical companies to leverage theircapabilities in the areas of late-stage development, regulatory management and commercialization to ultimately generate revenue for our company. Our revenuecurrently consists mostly of license fees and milestones from our licensees. In addition to advancing our early-stage proprietary drug candidates, we intend to usean acquisition strategy to add new assets, pipelines, and technologies that we anticipate will generate additional revenue streams in future years. Proprietary Product CandidatesWe have a portfolio of unique monoclonal antibodies and technologies that we intend to license to pharmaceutical and biotechnology companies to furthertheir clinical development. A summary of these product candidates is provided below: •X358 is a first-in-class 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 glucosecaused by excessive insulin produced by the body). There are two rare disease indications that may benefit from X358 that are of greatest interest tous: CHI, a hereditary disease resulting in lack of insulin regulation and profound hypoglycemia, and hypoglycemia in hyperinsulinemic PBS patients.In June 2015, we were granted Orphan Drug Designation for X358 by the Food and Drug Administration (“FDA”) for the treatment of CHI, and inJune 2016, we received Orphan Drug Designation for X358 in the same indication from the European Union.X358 has successfully completed Phase 1 testing in healthy volunteers, which showed the antibody reduced insulin sensitivity and decreased glucoseafter exogenous insulin injection and it appeared to be well tolerated, with no serious adverse events observed. The results were presented at theEndocrine Society's Annual Meeting in March 2015.2 In October 2015, we initiated a single-dose Phase 2 POC study of X358 in patien ts with CHI and in April 2016, we initiated a single-dose Phase 2POC study of X358 in PBS patients experiencing hypoglycemia after meals. In September 2016, we presented the initial data from nine patients whohad enrolled in the CHI and PBS studies, toge ther with safety data from 22 healthy volunteers. Shortly thereafter, we submitted a proposal to theUnited Kingdom's Medicines and Healthcare Products Regulatory Agency (“MHRA”) to initiate a multi-dose Phase 2 clinical study of X358 inchildren two years and older diagnosed with CHI. The MHRA approved the protocol in principal, and the study is in now in review at local ethicscommittees. We anticipate the site to be ready for first dosing in the UK in the second quarter of 2017. Submissions of this study are underway inGermany, Denmark and Israel as well.In January 2017, we announced that we have established POC for X358 in CHI and hypoglycemia PBS. The CHI acute studies met their objectivesof establishing initial safety and X358 POC in CHI patients aged 12 and up across several dosing levels. We are nearing the launch of a multi-dosestudy in children with CHI aged two and up that will be conducted in the United Kingdom. The PBS study has completed dosing in the single-dosecohorts and has also met its objectives. In February 2017, we initiated a multi-dose study in PBS.We believe a therapy that safely and effectively mitigates insulin-induced hypoglycemia has the potential to address a significant unmet therapeuticneed for these rare medical conditions associated with hyperinsulinism. •X213 (formerly LFA 102) is a first-in-class allosteric inhibitor of prolactin action. It is a humanized IgG1-Kappa monoclonal antibody that binds tothe 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. Prolactin is a protein that in normalpost-partum females enables the production of milk. In some cases, including prolactinomas, which are benign tumors of the pituitary gland in bothmen and women, excess secretion can lead to various clinically significant abnormal signs and symptoms. We discovered X213 under ourcollaboration with Novartis AG (formerly Chiron Corporation), and we exercised our right to bring the product back into our portfolio to develop itfor diseases of hyperprolactinemia. We have initiated a Phase 2A POC study in women who wish to suppress lactation.X213 could be developed to treat hyperprolactinemia in prolactinomas, a condition of benign tumors on the pituitary gland that leads to sexualdysfunction, infertility, and osteoporosis. For ten percent of the 140,000 prolactinoma patients in the United States, existing therapies are poorlytolerated or not effective. It also could be developed for anti-psychotic-induced hyperprolactinemia, a side effect seen in patients treated withcommonly used antipsychotics, antidepressants, and pain medications. These patients exhibit the same signs and symptoms as prolactinoma, andcompliance with anti-psychotic therapies is poor. Currently available therapies to address these side effects can worsen psychosis. •X129 is a highly potent fragment of a monoclonal antibody (“Fab”) with negative allosteric modulation activity against the insulin receptor. Inanimal model testing, it appears to have a fast-onset of action and short half-life. Hypoglycemia is a serious medical condition in patients with Type2 diabetes mellitus and Type 1 diabetes mellitus (“T1 DM”) and can occur as a result of insulin therapy, accidental insulin overdose or treatmentwith 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 acutesevere hypoglycemia, which can result in confusion, loss of consciousness, and seizure. Acute severe hypoglycemia often presents during thenocturnal hours in patients who are treated aggressively for their T1 DM, which puts them at elevated risk for loss of consciousness and seizure. Themedical community has long been challenged with how to prevent patients from experiencing nocturnal acute severe hypoglycemia, yet there havenot been any significant breakthroughs in pharmaceutical development efforts or experiments in dietary practices.We have conducted preclinical testing for X129. In vitro assays showed X129 decreases the activity of insulin on mammalian cells over-expressinghuman, rat and minipig insulin receptor (“INSR”) in a dose-dependent manner. Further studies confirmed X129 binds to the INSR and acts as anegative allosteric modulator. In animal studies, potential rescue of insulin or sulphonylurea-induced hypoglycemia was modeled in normal rats.Administration of insulin or glibenclamide (a sulfonylurea) produced abnormally low glucose levels. Intravenous administration of X129 at timepoints wherein the drug-induced glucose levels were falling below normal levels rapidly stabilized blood glucose levels thereby preventinghypoglycemia. In normal minipigs, intramuscular administration normalized the hypoglycemia induced by Vetsulin (an intermediate acting piginsulin) with the effect lasting for several hours, thereby confirming the activity in mammals. When tested in a nocturnal hypoglycemia model inminipigs, subcutaneous administration of X129 successfully prevented blood glucose drop through the eight-hour duration of the study. The resultsfrom the rat studies were presented at the Endocrine Society's Annual Meeting in April 2016. The results from the minipig studies will be presentedat the Endocrine Society's Annual Meeting in April 2017. We believe X129 could potentially offer clinicians a therapy that has rapid onset,improved efficacy and optimal duration of therapy to treat patients with acute severe hypoglycemia where currently available therapies areinadequate.3 •Gevokizumab is a potent humanized monoclonal antibody with unique allosteric properties that has the potential to treat patients with a wide varietyof inflammatory diseases. Gevokizumab binds strongly to interleukin 1 (“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 a collaboration agreement with Les Laboratories Servier (“Servier”) to jointly develop and commercializegevokizumab in multiple indications. Under the terms of that collaboration agreement, Servier had worldwide rights to gevokizumab forcardiovascular 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 theprimary endpoint of time to first acute ocular exacerbation. Due to these results and belief they would be predictive of results in our otherEYEGUARD studies of gevokizumab in patients with non-infectious uveitis (“NIU”), in August 2015 we decided to end the EYEGUARD globalPhase 3 program prior to its planned completion. Servier and we closed down the EYEGUARD clinical sites and, as anticipated, neitherEYEGUARD-A nor EYEGUARD-C produced positive results.In September 2015, Servier notified us of its intention to terminate the collaboration agreement, and return the worldwide gevokizumab rights toXOMA. The termination of the collaboration agreement became effective on March 25, 2016.In March 2016, we closed our Phase 3 study of gevokizumab in pyoderma gangrenosum (“PG”). A preliminary review of the data from the study didnot show a clear signal of activity in PG. •Additional Preclinical Product Candidates: In November 2016, we unveiled two novel oncology and oncology-related product candidates. oThe first targets interleukin 2, (“ IL-2” ), which has long been recognized as an effective therapy for metastatic melanoma and renalcell carcinoma, but it has serious dose-limiting toxicities that prevent broad clinical use. We have generated novel antibodies that,when given with IL-2, are intended to steer IL-2 to enhance its positive impact with less toxicity, potentially improving thetherapeutic index over standard IL-2 therapy. oThe other is an anti-parathyroid receptor (“ PTH1R ”) portfolio that includes several unique functional antibody antagonists targetingPTH1R, a G-protein-coupled receptor involved in the regulation of calcium metabolism. These antibodies have shown promisingefficacy in in vivo studies and could potentially address unmet medical needs, including primary hyperparathyroidism and humoralhypercalcemia of malignancy (“HHM”). HHM is present in many advanced cancers and is caused by high serum calcium due toincreased levels of the PTH1R ligand PTH-related peptide (“PTHrP”). Current HHM treatments often fall short and many cancerpatients die from ‘metabolic death'. XOMA’s PTH1R antibodies could be beneficial for the treatment of HHM.Technologies Available for Non-Exclusive LicenseWe have a unique set of antibody discovery, optimization and development technologies available for licensing, including: •ADAPT™ (Antibody Discovery Advanced Platform Technologies): proprietary human antibody phage display libraries, integrated with yeast andmammalian display, which can be integrated into antibody discovery programs through license agreements. We believe access to ADAPT™Integrated Display offers a number of benefits because it enables the diversity of phage libraries to be combined with accelerated discovery due torapid immunoglobulin (“IgG”) reformatting and fluorescence-activated cell sorting based screening using yeast and mammalian display. Thisincreases the probability of technical and business success in finding rare and unique functional antibodies directed to targets of interest. •ModulX™: technology which allows modulation of biological pathways using monoclonal antibodies and offers insights into regulation of signalingpathways, homeostatic control, and disease biology. Using ModulX™, XOMA has generated product candidates with novel mechanisms of actionthat specifically alter the kinetics of interaction between molecular constituents (e.g. receptor-ligand). ModulX™ technology enables expanded targetand therapeutic options and offers a unique approach in the treatment of disease.4 •OptimX™ technologies: oHuman Engineering™ (“HE™”): a proprietary humanization technology that allows modification of non-human monoclonalantibodies to reduce or eliminate detectable immunogenicity and make them suitable for medical purposes in humans. The technologyuses a unique method developed by us, based on analysis of the conserved structure-function relationships among antibodies. Themethod defines which residues in a non-human variable region are candidates to be modified. The result is an HE™ antibody withpreserved antigen binding, structure and function that has eliminated or greatly reduced immunogenicity. HE™ technology was usedin development of gevokizumab and certain other antibody products. oTargeted Affinity Enhancement™ (“TAE™”): a proprietary technology involving the assessment and guided substitution of aminoacids in antibody variable regions, enabling efficient optimization of antibody binding affinity and selectivity. TAE™ generates acomprehensive map of the effects of amino acid mutations in the complementarity-determining region likely to impact binding. Thetechnology has been licensed to a number of companies. •Flexible Manufacturing: patented technology relating 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 connecteasily and quickly to a central supply of utilities such as air, water, and electricity. This unique arrangement facilitates flexible manufacturing andeliminates change-over downtime. This translates into significantly reduced capital expenditures, production costs, and maintenance costs whileoffering meaningful time advantages over conventional manufacturing facilities. When MCRs are not in use, they can be easily moved tocleaning/refurbishing areas and prepared MCRs can be "plugged in" for manufacturing. The flexible manufacturing system can be applied to fieldsas diverse as pharmaceuticals, biologics, and electronics.Financial and Legal Arrangements of Product Collaborations, Licensing and Other ArrangementsLicensing and Collaboration AgreementsHistorically, we have licensed with or provided research and development collaboration services to world-class organizations, including Novartis, NovoNordisk and Takeda in pursuit of new antibody products, and we expect that we will continue to capitalize on partnered product arrangements as opportunitiesarise. Below is a list of such license arrangements:Novartis – Anti-TGFβ AntibodyIn September 2015, we and Novartis entered into a license agreement (the “License Agreement”) under which we granted Novartis an exclusive, worldwide,royalty-bearing license to our anti-TGF-β antibody program. Novartis is solely responsible for the development and commercialization of the antibodies andproducts containing the antibodies arising from this program.Under the License Agreement, we received a $37.0 million upfront fee, and are eligible to receive up to a total of $480.0 million in development, regulatoryand 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’ obligation to pay royalties with respect to a particular product and country willcontinue 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 commercialsale of the product in that country.Novartis – Anti-CD40 AntibodyIn September 2015, we and Novartis Vaccines and Diagnostics, Inc. (“NVDI”), further amended our 2008 Amended and Restated Research, Developmentand Commercialization Agreement, relating to anti-CD40 antibodies. Under this agreement, NVDI is solely responsible for the development and commercializationof the antibodies and products containing the antibodies arising from this program. The parties agreed to reduce the royalty rates that we are eligible to receive onsales 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 toa low double-digit percentage rate.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 nocollaboration product or former collaboration product is being developed or commercialized anywhere in the world and no royalty payments on these products aredue. 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.5 In connecti on with the collaboration between XOMA and Novartis AG (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 on June 21, 2015. On Jun e 19, 2015, we and NVDI, whoassumed the note agreement, agreed to extend the maturity date of our secured note agreement from June 21, 2015 to September 30, 2015, which was thensubsequently extended to September 30, 2020. At December 31, 2016, the outsta nding principal balance under this note agreement totaled $14.1 million and wasincluded in our long-term portion of interest bearing obligations in our consolidated balance sheet as of December 31, 2016. Under the terms of the arrangement asrestructured in November 2008, we will not make any additional borrowings on the Novartis note.Novo NordiskIn December 2015, we entered into a license agreement with Novo Nordisk under which we granted Novo Nordisk an exclusive, world-wide, royalty-bearing license to our XMetA program of allosteric monoclonal antibodies that positively modulate the insulin receptor (the “XMetA Program”), subject to ourretained commercialization rights for rare disease indications. Novo Nordisk has an option to add these additional rights to its license upon payment of an optionfee.Novo Nordisk is solely responsible for its expenses for the development and commercialization of antibodies and products containing antibodies arisingfrom the XMetA Program, subject to our retained rights described above. We have transferred certain proprietary know-how and materials relating to the XMetAProgram 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 onsales 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 andcommercialization milestones will continue for so long as Novo Nordisk is developing or selling products under the agreement, subject to the maximum milestonepayment 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 thedate 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 thatcountry.The agreement contains customary termination rights relating to material breach by either party. Novo Nordisk also has a unilateral right to terminate theagreement in its entirety on ninety (90) days’ notice.Servier – GevokizumabIn December 2010, we entered into a license and collaboration agreement (the “Collaboration Agreement”) with Servier to jointly develop andcommercialize gevokizumab in multiple indications. Under the terms of the Collaboration Agreement, Servier obtained worldwide rights to cardiovascular diseaseand diabetes indications (cardiometabolic field) and rights outside the United States and Japan to all other indications, including NIU, Behçet’s disease uveitis andother inflammatory and oncology indications. We retained development and commercialization rights in the United States and Japan for all indications other thancardiovascular disease and diabetes.In December 2010, 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 inXOMA’s intellectual property rights to all gevokizumab indications worldwide, excluding certain rights in the United States and Japan. Interest is calculated at afloating rate based on a Euro Inter-Bank Offered Rate and is subject to a cap. The interest rate is reset semi-annually in January and July of each year. The interestrate for the initial interest period was 3.22% and was reset semi-annually ranging from 1.81% to 3.83%. Interest for the six-month period from mid-July 2016through mid-January 2017 was reset to 1.81%. Interest is payable semi-annually and in January 2017, we paid $0.1 million in accrued interest to Servier.On January 9, 2015, Servier and we entered into Amendment No. 2 (“Loan Amendment”) to the Servier Loan Agreement. The Loan Agreement wasinitially entered into on December 30, 2010 and subsequently amended by a Consent, Transfer, Assumption and Amendment Agreement entered into as of August12, 2013, where the loan was transferred from XOMA Ireland Limited to XOMA (US) LLC. The Loan Amendment extended the maturity date of the loan fromJanuary 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 onJanuary 15, 2018. In addition, the loan becomes immediately due and payable upon certain customary events of default. In January 2016, we paid the principalamount of €3.0 million. At December 31, 2016, the outstanding principal balance under this loan was $12.6 million using the December 31, 2016 Exchange Rate of1.052. In January 2017, we entered into Amendment No. 3 to the Servier Loan Agreement (“Amendment No. 3”). Amendment No. 3 extended the maturity date ofthe €5.0 million due on January 15, 2017 to July 15, 2017. The other terms of the loan remained unchanged.6 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 became effective on March 25, 2016, and did not result in a change to th e then maturity date of our loan with Servier .TakedaIn November 2006, we entered into a collaboration agreement with Takeda under which we agreed to discover and optimize therapeutic antibodies againstmultiple targets selected by Takeda.Under the terms of this agreement, we may receive milestone payments aggregating up to $19.0 million relating to one undisclosed product candidate andlow 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 paymentfrom 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 programantibodies, collaboration targets 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 anddevelopment technologies and integrated information and data management systems. We may receive milestones of up to $3.3 million per discovery productcandidate 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 thereceipt 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 withrespect to all program antibodies, collaboration targets or collaboration products. Our right to royalties expires on the later of 10 years from the first commercialsale of such royalty-bearing discovery product or the expiration of the last-to-expire licensed patent.We have completed a technology transfer and do not expect to perform any further research and development services under this program. From 2011through 2016, we received milestone payments totaling $2.3 million relating to one currently active program.PfizerIn August 2007, we entered into a license agreement (the “2007 Agreement”) with Pfizer Inc. (“Pfizer”) for non-exclusive, worldwide rights for ourpatented bacterial cell expression technology for research, development and manufacturing of antibody products. In December 2015, we entered into a settlementand amended license agreement with Pfizer, under which we granted Pfizer fully-paid, royalty-free, worldwide, irrevocable, non-exclusive license rights to ourpatented bacterial cell expression technology for phage display and other research, development and manufacturing of antibody products for cash payment byPfizer of $3.8 million in full satisfaction of all obligations to us under the 2007 Agreement between XOMA (then XOMA Ireland Limited) and Pfizer Inc.,including all potential milestone, royalty and other fees under the 2007 Agreement. As a result of the settlement with Pfizer, the 2007 Agreement was terminated.In August 2005, we entered into a license agreement with Wyeth (subsequently acquired by Pfizer) for non-exclusive, worldwide rights for certain of ourpatented bacterial cell expression technology for vaccine manufacturing. In December 2016, we sold our rights to receive further royalties under this agreement foran upfront payment of $6.5 million and potential future payments of up to $4.0 million.DyaxIn October 2006, we entered into an amended and restated license agreement with DYAX, Corp. (“Dyax”) for worldwide, non-exclusive licenses for ourpatented bacterial cell expression technology in phage display. In consideration for the rights granted to Dyax, we received an upfront fee of $3.5 million. Inaddition, we would be eligible to receive royalties equal to 0.5% on net sales of any products subject to this license. In December 2016, we sold our rights toreceive further royalties under this agreement for a payment of $11.5 million.7 Sale of Biodefense Assets and Manufacturing FacilityOn November 4, 2015, we entered into an asset purchase agreement with Nanotherapeutics Inc. (the “Nanotherapeutics Purchase Agreement”), under whichNanotherapeutics agreed 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. As part of that transaction, the parties, subject to the satisfaction of certain conditions, entered into anintellectual property license agreement (the “Nanotherapeutics License Agreement”), under which we agreed to license to Nanotherapeutics certain intellectualproperty rights related to the purchased assets. Under the Nanotherapeutics License Agreement, we are eligible for up to $4.5 million of cash payments and 23,008shares of common stock of Nanotherapeutics, based upon Nanotherapeutics achieving certain specified future operational objectives. In addition, we are eligible toreceive 15% royalties on net sales of products. In February 2017, we executed an Amendment and Restatement to both the Nanotherapeutics Purchase Agreementand Nanotherapeutics License Agreement primarily to (i) remove the obligation to issue 23,008 shares of common stock of Nanotherapeutics under theNanotherapeutics Purchase Agreement, and (ii) revise the payment schedule related to the timing of the $4.5 million cash payments due to us under theNanotherapeutics License Agreement. Of the $4.5 million, $3.0 million is contingent upon Nanotherapeutics achieving certain specified future operating objectives.On November 5, 2015, we entered into an asset purchase agreement (the “Agenus Purchase Agreement”) with Agenus West, LLC, a wholly-ownedsubsidiary of Agenus Inc. (“Agenus”), pursuant to which Agenus agreed to acquire our pilot scale manufacturing facility in Berkeley, California, together withcertain related assets, including a license to certain intellectual property related to the purchased assets, and to assume certain liabilities of XOMA, in considerationfor 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. TheAgenus 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 additionto the cash consideration, we received shares of common stock of Agenus with an aggregate value of $0.5 million, which we subsequently sold in August 2016.The remaining common stock of Agenus will only be received upon our satisfaction of certain operational matters, which we are unlikely to satisfy.Sale of Future Revenue StreamsOn December 21, 2016, we entered into two Royalty Interest Acquisition Agreements (together, the “Acquisition Agreements”) with HealthCare RoyaltyPartners II, L.P. (“HCRP”). Under the first Acquisition Agreement, we sold our right to receive milestone payments and royalties on future sales of productssubject to a license agreement, dated August 18, 2005, between XOMA and Pfizer for an upfront cash payment of $6.5 million, plus potential additional paymentstotaling $4.0 million in the event three specified net sales milestones are met by Pfizer in 2017, 2018 and 2019. Under the second Acquisition Agreement, we soldall rights to royalties under an Amended and Restated License Agreement dated October 27, 2006 between XOMA and Dyax for a cash payment of $11.5 million.Financing AgreementsHercules Loan and Security AgreementIn February 2015, we entered into a Loan and Security Agreement with Hercules Technology Growth Capital, Inc., (the “Hercules Loan Agreement”) underwhich we borrowed $20.0 million. We used a portion of the proceeds received under the Hercules Loan Agreement to repay the outstanding principal, finalpayment fee, prepayment fee, and accrued interest of $5.5 million under a loan agreement with General Electric Capital Corporation.The interest rate under the Hercules Loan Agreement is calculated at a rate equal to the greater of either (i) 9.40% plus the prime rate as reported from timeto time in The Wall Street Journal minus 7.25%, and (ii) 9.40%. Payments under the Hercules Loan Agreement were interest only until June 1, 2016, after whichwe have paid 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, will be due and payable on the Hercules Loan MaturityDate. In addition, a final payment of $1.2 million will be due on the Hercules Loan Maturity Date, or such earlier date specified in the Hercules Loan Agreement. Ifwe prepay the loan prior to the Hercules Loan Maturity Date, we may pay Hercules a prepayment charge equal to 1.00% of the amount prepaid. Our obligationsunder the Hercules Loan Agreement are secured by a security interest in substantially all of our assets, other than our intellectual property.8 The Hercules Loan Agreement includes customary affirmative and restrictive covenants, but does not include any financial maintenance covenants, and alsoincludes standard events of default, including payment defaults. Up on the occurrence of an event of default, a default interest rate of an additional 5% may beapplied to the outstanding loan balances, and Hercules may declare all outstanding obligations immediately due and payable and take such other actions as set forthin the Hercules Loan Agreement. On December 21, 2016, we entered into Amendment No. 1 (the “Hercules Amendment”) to the Hercules Loan Agreement. Underthe Hercules Amendment, Hercules agreed to release its security interest on the assets subject to the Ac quisition Agreements with HCRP. In turn, in January 2017,we paid $10.0 million of the outstanding principal balance owed to Hercules. The $10.0 million payment was not subject to any prepayment charge. After takinginto account the January 2017 payment, t he principal balance of the Hercules Loan was $6.9 million.In connection with the Hercules Loan Agreement, we issued a warrant to Hercules that is exercisable for an aggregate of up to 9,063 shares of our commonstock at an exercise price of $66.20 per share (the “Hercules Warrant”). The Hercules Warrant may be exercised on a cashless basis and is exercisable for a termbeginning 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 XOMAas 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 certainproportional adjustments as set forth in the Hercules Warrant.Research and DevelopmentOur research and development expenses currently include costs of personnel, supplies, facilities and equipment, consultants, third-party costs and otherexpenses related to preclinical and clinical testing. In 2016, our research and development expenses were $44.2 million, compared with $70.9 million in 2015 and$80.7 million in 2014.Our research and development activities can be divided into those related to our internal projects and those related to collaborative and contractarrangements, which are reimbursed by our collaborators. In 2016, research and development expenses relating to internal projects were $42.8 million, comparedwith $50.2 million in 2015 and $51.3 million in 2014. In 2016, research and development expenses related to collaborative and contract arrangements were $1.4million, compared with $20.7 million in 2015 and $29.4 million in 2014. In December 2016, we initiated a corporate reorganization to eliminate all activities notdirectly in support of X358 clinical development.CompetitionThe biotechnology and pharmaceutical industries are subject to continuous and substantial technological change. Competition in antibody-basedtechnologies is intense and is expected to increase as new technologies emerge and established biotechnology firms and large chemical and pharmaceuticalcompanies continue to advance in the field. A number of these large pharmaceutical and chemical companies have enhanced their capabilities by entering intoarrangements with or acquiring biotechnology companies or entering into business combinations with other large pharmaceutical companies. Many of thesecompanies 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 othercompanies to develop products and processes competitive with or superior to ours. In addition, a significant amount of research in biotechnology is being carriedout in universities and other non-profit research organizations. These entities are becoming increasingly interested in the commercial value of their work and maybecome more aggressive in seeking patent protection and licensing arrangements. Furthermore, many companies and universities tend not to announce or discloseimportant 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 developmentof competitive products, particularly at the early stages. There can be no assurance that developments by others will not render our products or technologiesobsolete or uncompetitive.Without limiting the above, we are aware of the following competitors for our X358 product candidate: Biodel, Inc.; Eiger Biopharmaceuticals; Eli Lillyand Company; Locemia Solutions; S-cubed Limited; Xeris Pharmaceuticals and Zealand Pharma A/S. This list is not intended to be representative of all existingcompetitors in the market.9 Government RegulationThe FDA and comparable regulatory agencies in state and local jurisdictions and in foreign countries impose substantial requirements upon the clinicaldevelopment, pre-market approval, manufacture, marketing, import, export and distribution of biopharmaceutical products. These agencies and other regulatoryagencies 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 FDA or other regulatory requirements may result in Warning Letters, civil orcriminal penalties, suspension or delays in clinical development, recall or seizure of products, partial or total suspension of production or withdrawal of a productfrom the market. The development and approval process requires substantial time, effort and financial resources, and we cannot be certain that any approvals forour product candidates will be granted on a timely basis, if at all. Our product candidates must be approved by the FDA before we can begin marketing them in theUnited 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 productcandidates and various other factors.The necessary steps before a new biopharmaceutical product may be sold in the United States ordinarily include: •preclinical in vitro and in vivo tests, which must comply with Good Laboratory Practices (“GLP”); •submission to the FDA of an Investigational New Drug application (“IND”) which must become effective before clinical trials may commence, andwhich 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 (“GMP”), compliance and FDA inspection ofselect 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.The results of preclinical tests (which include laboratory evaluation as well as preclinical GLP studies to evaluate toxicity) for a particular productcandidate, together with related manufacturing information and analytical data, are submitted as part of an IND to the FDA. The IND automatically becomeseffective 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 anyoutstanding concerns before the clinical trial can begin. IND submissions may not result in FDA authorization to commence a clinical trial. A separate submissionto 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 centerand 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 findingthat the subjects or patients are being exposed to an unacceptable health risk. Clinical testing also must satisfy extensive GCP regulations and regulations forinformed 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 theproduct into humans, the product is tested to assess safety, metabolism, pharmacokinetics and pharmacological actions associated with increasing doses. Phase 2usually involves trials in a limited patient population to evaluate the efficacy of the potential product for specific, targeted indications, determine dosage toleranceand optimum dosage and further identify possible adverse reactions and safety risks. Phase 3 and pivotal trials are undertaken to evaluate further clinical efficacyand 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 licensees. Phase 1, Phase 2or 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. Clinical trials are subject to centralregistration and results reporting requirements, such as on www.clinicaltrials.gov.10 The results of preclinical studies, pharmaceutical development and clinical trials, together with information on a product’s chemistry, manufacturing, andcontrols, are submitted to the FDA in the form of a BLA, for approval of the manufacture, marketing and commercial shipment of the biopharmaceutical pr oduct.Data from clinical trials are not always conclusive and the FDA may interpret data differently than we or our licensees interpret data. The FDA also may convenean Advisory Committee of external advisors to answer questions regarding the approvabili ty and labeling of an application. The FDA is not obligated to follow theAdvisory Committee’s recommendation. The submission of a BLA is required to be accompanied by a substantial user fee, with few exceptions or waivers. Theuser fee is administered und er the Prescription Drug User Fee Act, which sets goals for the timeliness of the FDA’s review. A standard review period is twelvemonths from submission of the application, while priority review is eight months from submission of the application. The test ing and approval process is likely torequire 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 reviewof an application by refusing to file the applicatio n or not approve an application by issuance of a complete response letter if applicable regulatory criteria are notsatisfied, require additional testing or information, or require risk management programs and post-market testing and surveillance to monito r the safety or efficacyof the product. Approval may occur with significant Risk Evaluation and Mitigation Strategies (“REMS”), which limit the clinical use in the prescribinginformation, distribution or promotion of a product. Once issued, the FDA may w ithdraw product approval if ongoing regulatory requirements are not met or ifsafety 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 rarediseases, certain governments provide regulatory and commercial incentives for the development of drugs for small disease populations. In the United States, theterm ‘‘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 drugstatus are evaluated and granted by the Office of Orphan Products Development (“OOPD”) of the FDA and must be requested before submitting a BLA. In theUnited States, orphan drugs are subject to the standard regulatory process for marketing approval but are exempt from the payment of user fees for licensure, mayreceive market exclusivity for a period of seven years and some tax benefits, and are eligible for OOPD grants. If a product with orphan designation subsequentlyreceives 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 theFDA may not approve any other applications to market the same drug or biological product for the same indication, except in very limited circumstances, for sevenyears. Competitors, however, may receive approval of different products for the indication for which the orphan product has exclusivity or obtain approval for thesame product but for a different indication for which the orphan product has exclusivity. Orphan product exclusivity also could block the approval of one of ourproducts 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 tobe contained within the competitor’s product for the same indication or disease. If a drug or biological product designated as an orphan product receives marketingapproval for an indication broader than what is designated, it may not be entitled to orphan product exclusivity.International RegulationIn addition to regulations in the United States, we are subject to a variety of foreign regulations governing clinical trials and commercial sales anddistribution of any future products. Whether or not we obtain FDA approval for a product, we must obtain approval by the comparable regulatory authorities offoreign countries before we can commence clinical trials or market the product in those countries. The approval process varies from country to country, and thetime may be longer or shorter than that required for FDA approval. The requirements governing the conduct of clinical trials, product licensing, pricing andreimbursement vary greatly from country to country.Patents and Trade SecretsPatent and trade secret protection are important to our business and our future will depend in part on our ability to obtain patents, maintain trade secretprotection 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 numberof patents in the United States and internationally to protect our products and important processes. We also have obtained or have the right to obtain licenses tocertain patents and applications filed by others. However, the patent position of biotechnology companies generally is highly uncertain and consistent policyregarding the breadth of allowed claims has not emerged from the actions of the U.S. Patent and Trademark Office (“Patent Office”) with respect to biotechnologypatents. Accordingly, no assurance can be given that our patents will afford protection against competitors with similar technologies or others will not obtainpatents claiming aspects similar to those covered by our patent applications.11 We have established a portfolio of patents in the United States, Europe and certain other countries for our insulin receptor antibody p rograms. EuropeanPatent 2 480 254 and Japanese patent 5849050 cover insulin receptor-modulating antibodies having the functional properties of X358. U.S. Patent No. 8,926,976covering insulin receptor-activating antibodies having the functional properties of the lead antibody in our XMetA program, subsequently licensed to NovoNordisk. WO2016/141111 relates to methods of treating or preventing post-prandial hypoglycemia after gastric bypass surgery using a negative modulatorantibody to the insulin recepto r. WO2017/024285 relates to methods of treating or preventing hypoglycemia using a negative modulator antibody fragment thatbinds to the insulin receptor . 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, X213, following return of the program byNovartis. 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, aswell as nucleic acids, expression vectors and production cell lines for the manufacture of such antibodies and antibody 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 withhigh 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 withcertain doses of IL-1 beta binding antibodies or binding fragments. Additional U.S. Patents relate to methods of treating certain IL-1 related inflammatory diseases,TI DM, certain cancers, certain IL-1 beta related coronary conditions, inflammatory eye disease or uveitis, with gevokizumab or other IL-1 beta antibodies andfragments 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 bindingantibodies and binding fragments. Also, patents have been granted by the European Patent Office and certain other countries for gevokizumab, as well as nucleicacids, 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 TGFβ antibody program toNovartis. The licensed intellectual property includes US Patent Nos. 8,569,464 and 9,145,458 covering our lead TGFβ antibodies and methods of use thereof, andWO2016/161410 relating to combination therapy using an inhibitor of TGF b and an inhibitor of PD-1 for treating or preventing recurrence of cancer.We established a portfolio of patents related to our bacterial expression technology, including claims to methods for expression and secretion ofrecombinant proteins from bacteria, including immunoglobulin gene products, and improved methods and cells for expression of recombinant protein products. Wehave granted more than 60 licenses to biotechnology and pharmaceutical companies to use the Company’s patented and proprietary technologies relating tobacterial expression of recombinant pharmaceutical products. The last-to-expire patent licensed under the majority of these license agreements is Canadian patent1,341,235, which is expected to expire in May 2018.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 othersin order to develop and commercialize certain potential products incorporating our technology. There can be no assurance that such licenses, if required, will beavailable 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 ourproprietary technology and processes, in part, by confidentiality agreements with our employees, consultants and collaborators. These parties may breach theseagreements, and we may not have adequate remedies for any breach. Our trade secrets may otherwise become known or be independently discovered bycompetitors. To the extent that we or our consultants or collaborators use intellectual property owned by others, we may have disputes with our collaborators orconsultants or other third parties as to the rights in related or resulting know-how and inventions.Financial Information about Geographic AreasWhen 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. 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 makerof XOMA. Our property and equipment is held 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, 2016,Financial Statements: Concentration of Risk, Segment and Geographic Information.12 Concentration of RiskFive Prime, Servier, and National Institute of Allergy and Infectious Diseases (“NIAID”) accounted for 27 percent, 22 percent, and 19 percent, respectively,of our total revenue in 2016. In 2015, Novartis 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. At December 31, 2016, NIAID accounted for 85 percent of the accounts receivable balance. At December 31, 2015, FivePrime, NIAID, Servier and Centocor accounted for 39 percent, 25 percent, 18 percent and 10 percent, respectively, of the accounts receivable balance. None ofthese 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.EmployeesAs of March 14, 2017, we employed 18 full-time employees at our headquarters in Berkeley, California. In addition, there are seven employees who willterminate employment on either March 31, 2017 or June 30, 2017 in connection with the restructuring activities in December 2016. None of our employees areunionized. Our employees are primarily engaged in clinical operations and in executive, business development, finance and administrative positions.Available InformationFor information on XOMA’s investment prospects and risks, please contact Pure Communications at (910) 726-1372 or by sending an e-mail message toinvestorrelations@xoma.com.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 RelationsDepartment: •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 orfurnished under Section 13(a) or 15(d) of the Exchange Act will be available as soon as reasonably practicable after such material is electronicallyfiled with the SEC. All reports we file with the SEC also can be obtained free of charge via EDGAR through the SEC’s website athttp://www.sec.gov. •Our policies related to corporate governance, including our Code of Ethics applying to our directors, officers and employees (including our principalexecutive officer and principal financial and accounting officer) that we have adopted to meet the requirements set forth in the rules and regulationsof the SEC and its corporate governance principles. •The charters of the Audit, Compensation and Nominating & Governance Committees of our Board of Directors.We intend to satisfy the applicable disclosure requirements regarding amendments to, or waivers from, provisions of our Code of Ethics by posting suchinformation on our website. Item 1A.Risk FactorsThe following risk factors and other information included in this annual report should be carefully considered. The risks and uncertainties described beloware 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 risksoccur, our business, financial condition, operating results and cash flows could be materially adversely affected.Risks Related to our Financial Results and Capital RequirementsWe have sustained losses in the past, and we expect to sustain losses in the foreseeable future.We had a net loss of $53.5 million, $20.6 million, and $38.3 million for the years ended December 31, 2016, 2015 and 2014, respectively. As of December31, 2016, we had an accumulated deficit of $1.2 billion.Our product candidates are still being developed, and we do not know whether we will ever achieve sustained profitability or whether cash flow from futureoperations will be sufficient to meet our needs.13 We have devoted most of our financial resources to research and develop ment, including our non-clinical development activities and clinical trials. To date,we have financed our operations primarily through the sale of equity securities and debt, and collaboration and licensing arrangements. Our total debt currentlyexceeds o ur total cash and cash equivalents. The size of our future net losses will depend, in part, on the rate of future expenditures and our ability to generaterevenues. We expect to continue to incur substantial expenses as we continue our development and lice nsing activities for our product candidates. If our productcandidates are not successfully developed or commercialized by our licensees, or if revenues are insufficient following marketing approval, we will not achieveprofitability and our business may f ail. Our ability to achieve profitability is dependent in large part on the success of our ability to license our product candidates,and the success of our licensees’ development programs, both of which are uncertain. Our success is also dependent on our licensees obtaining regulatory approvalto market our product candidates which may not materialize or prove to be successful.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 ifthey are not available, we may be forced to delay, reduce, or eliminate our product development programs or to take actions that could adversely affect aninvestment 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 onacceptable 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 weraise additional funds through collaboration and licensing arrangements with third parties, we may be required to relinquish some rights to our technologies or ourproduct 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 ofdevelopment 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: •terminate or delay clinical trials for one or more of our product candidates; •reduce or eliminate certain product development efforts; or •further reduce our 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 ourantibody technologies, debt and through sales of our common stock.Based on our cash and cash equivalents of $25.7 million at December 31, 2016, plus the $24.9 million in net proceeds received from an equity financing inFebruary 2017, and taking into consideration our anticipated spending levels and scheduled debt payments, without the receipt of funds from new licenseagreements or milestone payments based on development achievements of our licensees, we will be unable to fund our operations through the next 12 monthsfollowing the issuance of our consolidated financial statements. Based on our current projections, we expect our current cash and cash equivalents will not besufficient to fund our operations and pay scheduled debt payments beyond February of 2018. Therefore, we determined there is substantial doubt regarding ourability to continue as a going concern within one year from the date the consolidated financial statements are issued. Our independent registered public accountingfirm has included in its auditor’s report on our consolidated financial statements, included in this Annual Report on Form 10-K, a “going concern” explanatoryparagraph, meaning that we have recurring losses from operations and negative cash flows from operations that raise substantial doubt regarding our ability tocontinue as a going concern. We may not be able to obtain sufficient additional funding through monetizing certain of our existing assets, entering into new licenseagreements, issuing additional equity or debt instruments or any other means, and if we are able to do so, they may not be on satisfactory terms. Consistent with theactions we have taken in the past, we will take steps intended to enable the continued operation of the business which may include out-licensing or sale of assetsand reducing other expenditures that are within our control. These reductions in expenditures may have a material adverse impact on our ability to achieve certainof our planned objectives. 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: •operations will generate meaningful funds; •additional agreements for product development funding can be reached; •we will be able to repay our current debt or negotiate new debt arrangements;14 •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 andfurther reduce costs. Even if we are able to source additional funding, we may be forced to significantly reduce our operations if our business prospects do notimprove. If we are unable to source additional funding, we may be forced to shut down operations altogether.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, in connection with our efforts to lower operating expenses andpreserve capital while continuing to focus on our product pipeline, we implemented a workforce reduction, which led to the termination of 52 employees during thesecond half of 2015. On December 19, 2016, we approved a restructuring of our business based on our decision to focus our efforts on advancing our X358 clinicalprograms. The restructuring included a reduction-in-force in which we terminated 57 employees.During the year ended December 31, 2016, we recorded an aggregate restructuring charge of approximately $4.6 million related to severance, othertermination benefits and outplacement services in connection with the workforce reduction implemented in December 2016. During the year ended December 31,2015, we recorded an aggregate restructuring charge of approximately $2.9 million related to severance, other termination benefits and outplacement services inconnection with the workforce reduction implemented in August 2015. In addition, we recognized an additional restructuring charge of $0.8 million in totalcontract 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 inefficienciescaused 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 theseoutcomes could prevent us from meeting our strategic objectives and could adversely impact our results of operations and financial condition.Risks Related to the Development and Commercialization of our Current and Future Product Candidates We may not be successful in entering into out-license agreements for our product candidates, which may adversely affect our liquidity and business.We intend to pursue a strategy to out-license some of our product candidates in order to provide for potential payments, funding and/or royalties on futureproduct sales. The out-license agreements may also be structured to share in the proceeds received by a licensee as a result of further development orcommercialization of the product candidates. We may not be successful in entering into out-licensing agreements with favorable terms as a result of factors, manyof which are outside of our control. These factors include: •research and spending priorities of potential licensing partners; •willingness of, and the resources available to, pharmaceutical and biotechnology companies to in-license drug candidates to fill their clinicalpipelines; or •our inability to generate proof-of-concept data and to agree with a potential partner on the value of our product candidates, or on the related terms.If we are unable to enter into out-licensing agreements for our product candidates and realize license , milestone and royalty fees when anticipated, it mayadversely affect our liquidity and we may be forced to curtail or delay development of our product candidates, which in turn may harm our business.If our therapeutic product candidates do not receive regulatory approval, our licensees will be unable to market them.Our product candidates 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: •clinical development and testing; •manufacturing;15 •labeling; •storage; •record keeping; •promotion and marketing; and •importing and exporting.In the United States, the Food and Drug Administration (“FDA”) regulates pharmaceutical products under the Federal Food, Drug, and Cosmetic Act andother laws, including, in the case of biologics, the Public Health Service Act. At the present time, we believe all of our product candidates will be regulated by theFDA as biologics.Initiation of clinical trials requires approval by health authorities. Clinical trials involve the administration of the investigational new drug to healthyvolunteers or to patients under the supervision of a qualified principal investigator. Clinical trials must be conducted in accordance with FDA and InternationalConference on Harmonization Good Clinical Practices and the European Clinical Trials Directive, as applicable, under protocols that detail the objectives of thestudy, the parameters to be used to monitor safety and the efficacy criteria to be evaluated. Other national, foreign and local regulations also may apply. Thedeveloper of the drug must provide information relating to the characterization and controls of the product before administration to the patients participating in theclinical 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 mayissue 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 regulatory restrictions, X358 clinical testing is currently limited to studies in adults in the U.S, and patients 12 and over in continental Europe. Wesubmitted a proposal to the United Kingdom's Medicines and Healthcare Products Regulatory Agency (“MHRA”) to initiate a multi-dose Phase 2 clinical study ofX358 in children two years and older diagnosed with CHI. The MHRA approved the protocol in principal, and the study is in now in review at local ethicscommittees. We anticipate the site to be ready for first dosing in the UK in the second quarter of 2017. We cannot assure you that our proposed protocols for suchtesting will be approved, or that U.S. and foreign health authorities will not issue a clinical hold with respect to these or any of our other 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 andother 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 biologicalproduct, requesting approval to commence commercial sales. In responding to an NDA or BLA, the FDA or foreign health authorities may grant marketingapprovals, request additional information or further research, or deny the application if they determine the application does not satisfy 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 varysubstantially based upon the type, complexity, and novelty of the products involved, as well as the target indications. FDA regulations and policies permitapplicants to request accelerated approval or priority review pathways for products intended to treat certain serious or life-threatening illnesses in certaincircumstances. If granted by the FDA, these pathways can provide a shortened timeline to commercialize the product, although the shortened timeline is oftenaccompanied by additional post-market requirements. Although we may pursue the FDA’s accelerated approval or priority review programs, we cannot guaranteethe 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 acceleratedapproval 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 ormanufacturing-related studies.Changes in the regulatory approval policy during the development period, changes in, or the enactment of additional regulations or statutes, or changes inregulatory review for each submitted product application may cause delays in the approval or rejection of an application. State regulations may also affect ourproposed products.16 The FDA and other regulatory agencies have substantial discretion in both the product approval process and manufacturing facility approval process, and asa result of this discretion and uncertainties about outcomes of testing, we cannot predict at what point, or whet her, the FDA or other regulatory agencies will besatisfied with our or our licensees’ submissions or whether the FDA or other regulatory agencies will raise questions that may be material and delay or precludeproduct approval or manufacturing facility ap proval. In light of this discretion and the complexities of the scientific, medical and regulatory environment, ourinterpretation or understanding of the FDA’s or other regulatory agencies’ requirements, guidelines or expectations may prove incorrect, whi ch also could delayfurther or increase the cost of the approval process. As we accumulate additional clinical data, we and our licensees will submit it to the FDA and other regulatoryagencies, as appropriate, and such data may have a material impact on t he approval process.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 areeffective, 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 orour licensees may never receive regulatory approval for any of our product candidates. Even if a product candidate receives regulatory approval, the resultingproduct may not gain market acceptance among physicians, patients, healthcare payors and the medical community.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 notpositive. 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 itsprimary endpoint. In addition, neither EYEGUARD-A nor EYEGUARD-C produced positive results. In March 2016, we decided to close our Phase 3 studies ofgevokizumab in pyoderma gangrenosum (“PG”). A preliminary review of the available data did not show a clear signal of activity in PG.Our product candidates require significant additional research and development, extensive preclinical studies and clinical trials and regulatory approval priorto any commercial sales. This process is lengthy and expensive, often taking a number of years. As clinical results frequently are susceptible to varyinginterpretations that may delay, limit or prevent regulatory approvals, the length of time necessary to complete clinical trials and to submit an application formarketing approval for a final decision by a regulatory authority varies significantly. As a result, it is uncertain whether: •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 successful in finding collaboration and licensing partners to advance our product candidates on our behalf; •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, includingfailure 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, changes in key personnel at clinical institutions, difficulties in identifying and enrollingpatients who meet trial eligibility criteria and shortages of available drug supply. In addition, if we license our product candidates to others to fund and conductclinical trials, we may have limited control over how quickly and efficiently such licensees advance those trials. Patient enrollment is a function of many factors,including the size of the patient population, the proximity of patients to clinical sites, the concentration of patients in specialist centers, the eligibility criteria for thetrial, the existence of competing clinical trials and the availability of alternative or new treatments. Regardless of the initial size or relative complexity of a clinicaltrial, the costs of such trial may be higher than expected due to increases in duration or size of the trial, changes in the protocol under which the trial is beingconducted, additional or special requirements of one or more of the healthcare centers where the trial is being conducted, or changes in the regulatory requirementsapplicable to the trial or in the standards or guidelines for approval of the product candidate being tested or for other unforeseen reasons.17 In addition, we and our licensees conduct clinical trials in foreign countries, which may subject us to further d elays and expenses as a result of increaseddrug shipment costs, additional regulatory requirements and the engagement of foreign clinical research organizations, and may expose us to risks associated withforeign currency transactions to make contract pay ments denominated in the foreign currency where the trial is being conducted.All of our product candidates are prone to the risks of failure inherent in drug development. Preclinical studies may not yield results that satisfactorilysupport the filing of an Investigational New Drug application (“IND”) (or a foreign equivalent) with respect to our product candidates. Even if these applicationswould 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 may not predict the results of later-stage clinical trials, including the safety and efficacy profiles of any particular product candidates. Forexample, 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 or our licensees’ clinical trials will be focused on appropriate indications, patient populations, dosingregimens or other variables that will result in obtaining the desired efficacy data to support regulatory approval to commercialize the drug. Moreover, FDA officialsor foreign regulatory agency officials may question the integrity of our data or otherwise subject our or our licensees’ clinical trials to additional scrutiny when theclinical trials are conducted by principal investigators who serve, or previously served, as scientific advisors or consultants to us and receive cash compensation inconnection with such services. Preclinical and clinical data can also be interpreted in different ways. Accordingly, FDA officials or officials from foreign regulatoryauthorities 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 product candidates may produce undesirable side effects, also known as adverse effects. Toxicities and adverse effects that wehave observed in preclinical studies for some compounds in a particular research and development program may occur in preclinical studies or clinical trials ofother 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 tosuch product candidates or cause us to cease clinical trials with respect to any drug candidate. In clinical trials, administering any of our product candidates tohumans may produce adverse effects. These adverse effects could interrupt, delay or halt clinical trials of our products and product candidates and could result inthe FDA or other regulatory authorities denying approval of our product candidates for any or all targeted indications. The FDA, other regulatory authorities, ourdevelopment 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, theoccurrence of even a limited number of toxicities or adverse effects when used in large populations may cause the FDA or other regulatory authorities to imposerestrictions 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 believeare 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 inlarge populations or for extended periods of time. Any failure or significant delay in completing preclinical studies or clinical trials for our product candidates, or inreceiving 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 product candidates noncompetitive or obsolete.Developments by others may render our product candidates or technologies obsolete or uncompetitive. Technologies developed and utilized by thebiotechnology and pharmaceutical industries are changing continuously and substantially. Competition in antibody-based technologies is intense and is expected toincrease in the future as a number of established biotechnology firms and large chemical and pharmaceutical companies advance in these fields. Many of thesecompetitors may be able to develop products and processes competitive with or superior to our own for many reasons, including that they may have: •significantly greater financial resources; •larger research and development staffs; •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 licensees. In addition, asignificant amount of research in biotechnology is being carried out in universities and other non-profit research organizations. These entities are becomingincreasingly 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 secureor, for other reasons, later. As a result, we may not be able to track development of competitive products, particularly at the early stages.18 Positive or negative developments in connection with a potentially competing prod uct may have an adverse impact on our ability to raise additional fundingon acceptable terms. For example, if another product is perceived to have a competitive advantage, or another product’s failure is perceived to increase thelikelihood that our produ ct will fail, then investors may choose not to invest in us on terms we would accept or at all.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 X358, a fully human negative allosteric modulating insulin receptor antibody, as a novel treatment for non-drug-induced, endogenoushyperinsulinemic hypoglycemia (low blood glucose caused by excessive insulin produced by the body) disorders including CHI and hypoglycemia post gastricbypass. Certain other companies are developing products based on improved versions of glucagon, a hormone naturally secreted by the pancreas that counteractsthe effects of insulin by raising blood glucose levels. •Biodel Inc. is developing a formulation of glucagon designed to remain stable in solution for a longer period than existing commercial formulations.FDA and European Medicines Agency (“EMA”) have granted orphan drug designation for Biodel's glucagon for the prevention of hypoglycemia inthe CHI population. •Eiger Biopharmaceuticals is developing exendin (9-39), a glucagon-like peptide 1 (GLP-1) antagonist, for the treatment of hypoglycemic episodesfollowing gastric bypass surgery, as well as for CHI patients. FDA has granted orphan drug designation for exendin (9-39) for the treatment ofcongenital hyperinsulinemic hypoglycemia and other causes of hyperinsulinemic hypoglycemia in adults and children. •Eli Lilly and Company and Locemia Solutions are in phase 3 testing of an intranasal glucagon treatment for severe hypoglycemia in people withdiabetes treated with insulin. •S-cubed Limited is developing a synthetic form of glucagon. It is expected to be given under the skin using a special infusion pump. EMA hasgranted 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 forthe prevention of severe, persistent hypoglycemia in patients with CHI. •Zealand Pharma A/S has a glucagon analog in late-stage development.Our product candidates are monoclonal antibodies and are differentiated due to our expertise in the allosteric modulation of cellular receptors. Our productcandidates currently are delivered by intravenous administration. We are developing subcutaneous versions to allow for at-home administration or administration ina physician’s office, thereby reducing the potential that our targeted patient populations increase the demand on over-burdened infusion centers. However,physicians and patients may prefer daily oral dosing of potential competitor products to a longer-acting monoclonal antibody, which will impact the commercialvalue of X358.We or our licensees may be unable to price our products effectively or obtain adequate reimbursement for sales of our products, which would prevent ourproducts from becoming profitable.If we or our third-party licensees succeed in bringing our product candidates to the market, they may not be considered cost effective, and reimbursement tothe 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 ofmedical products and treatments are dependent, in part, on the availability of reimbursement to the patient from third-party payors, such as government and privateinsurance plans. Third-party payors are increasingly challenging the prices charged for pharmaceutical products and services. Our business is affected by the effortsof 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 tobe 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 pharmaceuticalproducts. We cannot predict whether any legislative or regulatory proposals will be adopted or the effect these proposals or managed care efforts may have on ourbusiness.19 We do not know whether there will be, or will contin ue 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 licenseesmay experience difficulties in launching new products, many of which are novel and based on technologies that are unfamiliar to the healthcare community. Wehave no assurance healthcare providers and patients will accept such products, if developed. Similarly, physicians may not accept a product if they believe otherproducts 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 tohealthcare providers and patients. Such guidelines or recommendations can be very influential and may adversely affect product usage directly (for example, byrecommending a decreased dosage of a product in conjunction with a concomitant therapy) or indirectly (for example, by recommending a competitive productover 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 ofgeneric or biosimilar 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.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 liabilityclaims filed against Genentech Inc. and, even though Genentech agreed to indemnify us in connection with these matters and these matters have been settled, therecan 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 adequateprotection against such liabilities. In the event of one or more large, unforeseen awards of damages against us, our product liability insurance may not provideadequate 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 fromcash 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 futuresales opportunities, increased costs associated with replacing products, a negative impact on our goodwill and reputation, and divert our management’s attentionfrom 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 andprocesses, and prevent the use of the covered subject matter by third parties, our ability to compete in the market will be harmed, and we may not realize ourprofit potential.We rely on patent protection, as well as a combination of copyright, trade secret, and trademark laws to protect our proprietary technology and preventothers from duplicating our products or product candidates. However, these means may afford only limited protection and may not: •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 partnershold 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 alsohave 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 notconclusive 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 findthem unenforceable. The America Invents Act introduced post-grant review procedures subjecting U.S. patents to post-grant review procedures similar to Europeanoppositions. 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. Adecision 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.20 If our intellectual property rights are not protected adequately, our licensees may not be able to commercialize our technologies, products, or services, andour competitors could commercialize our tech nologies, which could result in a decrease in our sales and market share that would harm our business and operatingresults. Specifically, the patent position of biotechnology companies generally is highly uncertain and involves complex legal and factual q uestions. The legalstandards governing the validity of biotechnology patents are in transition, and current defenses as to issued biotechnology patents may not be adequate in thefuture. Accordingly, there is uncertainty as to: •whether any pending or future patent applications held by us will result in an issued patent, or whether issued patents will provide meaningfulprotection 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 aremore 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 thepayment of substantial damages or royalties, and prevent us from using technology that is essential to our business.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 todevelop and commercialize certain potential products incorporating our technology or we may become involved in litigation to determine the proprietary rights ofothers. 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 ourbusiness, 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 continuingtechnological advancement to develop and maintain our competitive position. All of our employees have signed confidentiality agreements under which they haveagreed not to use or disclose any of our proprietary information. Research and development contracts and relationships between us and our scientific consultantsand potential customers provide access to aspects of our know-how that are protected generally under confidentiality agreements. These confidentiality agreementsmay 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 mayaffect 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 ourfavor, could be substantial. Such litigation also could divert management’s attention and resources. If this litigation is resolved against us, our patents may bedeclared invalid, and we could be held liable for significant damages.In addition, we may be subject to claims that we are infringing other parties’ patents. If such claims are resolved against us, we or our licensees may beenjoined from developing, manufacturing, selling or importing products, processes or services unless we obtain a license from the other party. Such license may notbe available on reasonable terms, thus preventing us from using these products, processes or services and adversely affecting our revenue.Risks Related to Government RegulationWe 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 X358 for the treatment of CHI. Under the Orphan Drug Act, the first company to receive FDA approval for adrug for the designated orphan drug indication will obtain seven years of marketing exclusivity, during which time the FDA may not approve another company’sapplication 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 topatient care. In June 2016, the EMA granted Orphan Drug Designation to X358 for the treatment of CHI.21 Even though we have obtained orphan drug designation for certain product candidates for certain indications and even if we obtain orphan drug designationfor our f uture product candidates or for other indications, due to the uncertainties associated with developing pharmaceutical products, we or our licensees may notbe the first to obtain marketing approval of our product candidates for any particular orphan indica tion, or we or our licensees may not obtain approval for anindication for which we have obtained orphan drug designation. Further, even if we or our licensees obtain orphan drug exclusivity for a product, that exclusivitymay not protect the product effec tively from competition because different drugs can be approved for the same indication. Orphan drug designation neithershortens the development time or regulatory review time of a drug, nor gives the drug any advantage in the regulatory review or approva l processEven after FDA approval, a product may be subject to additional testing or significant marketing restrictions, its approval may be withdrawn or it may beremoved voluntarily from the market.Even if we or our licensees receive regulatory approval for our product candidates, we or our licensees will be subject to ongoing regulatory oversight andreview by the FDA and other regulatory entities. The FDA, the EMA, or another regulatory agency may impose, as a condition of the approval, ongoingrequirements for post-approval studies or post-approval obligations, including additional research and development and clinical trials, and the FDA, EMA or otherregulatory 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 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.Furthermore, marketing approval of a product may be withdrawn by the FDA, the EMA or another regulatory agency or such a product may be withdrawnvoluntarily by us based, for example, on subsequently arising safety concerns. The FDA, EMA and other agencies also may impose various civil or criminalsanctions 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 have enacted or are considering a number of legislative and regulatory proposals to change the healthcaresystem in ways that could affect our or our licensees’ ability to sell our products, if approved, profitably. Among policy makers and payers in the United States andelsewhere, there is significant interest in promoting changes in healthcare systems with the stated goals of containing healthcare costs, improving quality andexpanding access. In the United States, the pharmaceutical industry has been a particular focus of these efforts and has been significantly affected by majorlegislative initiatives.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, reduced product utilization and adversely affect our business and results of operations. Moreover, certain politicians haveannounced plans to regulate the prices of pharmaceutical products. We cannot know what form any such legislation may take or the market’s perception of howsuch 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, orcommercialize our current product candidates and those for which we may receive regulatory approval in the future.We and our licensees are subject to various state and federal healthcare-related laws and regulations that may impact the commercialization of our productcandidates 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 the federal Anti-Kickback Statute, the federalFalse Claims Act and state and federal privacy and security laws. These laws may impact, among other things, the commercial operations for any of our productcandidates that may be approved for commercial sale.22 The federal Anti-Kickback St atute prohibits persons from knowingly and willfully soliciting, offering, receiving or providing remuneration, directly orindirectly, 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 madeunder a federal healthcare program, such as the Medicare and Medicaid programs. Several courts have interpreted the statute’s intent requirement to mean that ifany one purpose of an arrangement involving remuneration is to in duce 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 violation s ofthe 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 toobtain 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 thegovernment and such individuals, commonly known as “whistleblowers,” may share in any amounts paid by the entity to the government in fines or settlement. Thefiling 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. Whenan 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 civilpenalties 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 schemeto defraud any healthcare benefit program and making false statements relating to healthcare matters. The health care fraud statute prohibits knowingly andwillfully executing a scheme to defraud any health care benefit program, including private payors. The 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 healthcare benefits, items or services. HIPAA, as amended by the Health Information Technology and Clinical Health Act, and its implementing regulations, also imposecertain requirements relating to the privacy, security and transmission of individually identifiable health information. We take our obligation to maintain ourcompliance with these various laws and regulations seriously.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 byany source, not only the Medicare and Medicaid programs. In addition, some states have laws that require pharmaceutical companies to comply with thepharmaceutical industry’s voluntary compliance guidelines and the applicable compliance guidance promulgated by the federal government, or otherwise restrictpayments that may be made to healthcare providers and other potential referral sources, and to report information related to payments and other transfers of value tophysicians and other healthcare providers; and state laws governing the privacy and security of health information in certain circumstances, many of which differfrom 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 or our licensees’ business activities could be subject to challenge under one or more ofsuch laws.If we or our licensees 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 thecurtailment or restructuring of our operations, any of which could have a material adverse effect on our business and results of operations.As we or our licensees do more business internationally, we will be subject to additional political, economic and regulatory uncertainties.We or our licensees 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 future business activities and when and if we or our licensees are able to generate income, a substantial portion ofthat income will be derived from product sales and other activities outside the United States. Foreign regulatory agencies often establish standards different fromthose 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 ituneconomical to proceed with a product or product candidate’s development. International sales may be limited or disrupted by: •imposition of government controls; •export license requirements; •political or economic instability; •trade restrictions;23 •changes in tariffs; •restrictions on repatriating profits; •exchange rate fluctuations; and •withholding and other taxation.Risks Related to Our Reliance on Third PartiesWe and our licensees rely on third parties to provide services in connection with our product candidate development and manufacturing programs. Theinadequate performance by or loss of any of these service providers could affect our product candidate development.Third parties provide services in connection with preclinical and clinical development programs, including in vitro and in vivo studies, assay and reagentdevelopment, immunohistochemistry, toxicology, pharmacokinetics, clinical trial support, manufacturing and other outsourced activities. If these service providersdo not adequately perform the services for which we or our licensees have contracted, or cease to continue operations, and we are not able to find a replacementprovider quickly or we lose information or items associated with our product candidates, our development programs may be delayed.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 alarge extent, upon securing the financial resources and marketing capabilities of third parties. For example, we have licensed our bacterial cell expressiontechnology, a set of enabling technologies used to discover and screen, as well as develop and manufacture, recombinant antibodies and other proteins forcommercial purposes, to over 60 companies.Because our licensees, suppliers and contractors are independent third parties, they may be subject to different risks than we are and have significantdiscretion in, and different criteria for, determining the efforts and resources they will apply related to their agreements with us. If these licensees, suppliers andcontractors 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 or our licensees will successfully develop and market any of the products that are or may become the subject of any of ourlicensing arrangements. In addition, third-party arrangements such as ours also increase uncertainties in the related decision-making processes and resultingprogress under the arrangements, as we and our 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, a part of the National Institute of Health (“NIH”), we invoiced using NIH provisional rates, and these are subject to futureaudits at the discretion of NIAID’s contracting office. These audits can result in an adjustment to revenue previously reported, which potentially could besignificant.Although we continue to evaluate additional strategic alliances and potential partnerships, we do not know whether or when any such alliances orpartnerships will be entered into.Failure of our product candidates to meet current Good Manufacturing Practices standards may subject us to delays in regulatory approval and penalties fornoncompliance.In December of 2015, we completed the sale of our manufacturing facility to Agenus and we are now completely reliant on third parties to produce materialfor preclinical work, clinical trials, and commercial product. Our licensees may similarly rely on third party manufacturers.These contract manufacturers are required to produce clinical product candidates under current Good Manufacturing Practices (“cGMP”) to meet acceptablestandards for use in clinical trials and for commercial sale, as applicable. If such standards change, the ability of contract manufacturers to produce our productcandidates on the schedule required for our clinical trials or to meet commercial requirements may be affected. In addition, contract manufacturers may not performtheir obligations under their agreements with us or our licensees, may discontinue their business before the time required by us to successfully produce clinical andcommercial supplies of our product candidates.24 Contract manufacturers are subject to pre-approval inspections and periodic unannounced inspections by the FDA and correspondin g state and foreignauthorities to ensure strict compliance with cGMP and other applicable government regulations and corresponding foreign standards. We do not have control over athird-party manufacturer’s compliance with these regulations and standards. Any difficulties or delays in contractors’ manufacturing and supply of our productcandidates or any failure of our contractors to maintain compliance with the applicable regulations and standards could increase costs, cause us to reduce revenue,make us or our licensees postpone or cancel clinical trials, prevent or delay regulatory approval by the FDA and corresponding state and foreign authorities, preventthe import and/or export of our product candidates, or cause any of our product candidates that ma y be approved for commercial sale to be recalled or withdrawn.Certain of our technologies are in-licensed from third parties, so our and our licensees’ capabilities using them are restricted and subject to additional risks.We license technologies from third parties. These technologies include phage display technologies licensed to us in connection with our bacterial cellexpression technology licensing program and antibody products. However, our and our licensees’ use of these technologies is limited by certain contractualprovisions in the licenses relating to them, and although we have obtained numerous licenses, intellectual property rights in the area of phage display areparticularly complex. If the owners of the patent rights underlying the technologies that we license do not properly maintain or enforce those patents, ourcompetitive position and business prospects could be harmed. 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. If we are unable to maintain our licenses, patents or other intellectual property, we could loseimportant protections that are material to continuing our operations and for future prospects. Our licensors also may seek to terminate our license, which couldcause us and our licensees to lose the right to use the licensed intellectual property and adversely affect our ability to commercialize our technologies, products orservices.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 asdirectly.The same factors that affect us directly also can adversely affect us indirectly by affecting the ability of our partners and others with whom we do businessto 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 dispositions, we have in the past and may in the future agree to accept equity securities of the licensee in payment offees. 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 moregenerally to the business and other risks to which the issuer of these shares may be subject.Risks Related to an Investment in Our Common StockOur 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 forour common stock. The market prices of biotechnology companies have been and are likely to continue to be highly volatile. Fluctuations in our operating resultsand general market conditions for biotechnology stocks could have a significant impact on the volatility of our common stock price. We have experiencedsignificant volatility in the price of our common stock. From January 1, 2016, through March 14, 2017, the share price of our common stock has ranged from a highof $27.20 to a low of $3.96. Factors contributing to such volatility include: •results of preclinical studies and clinical trials; •information relating to the safety or efficacy of products or product candidates; •developments regarding regulatory filings; •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; •government regulations; •developments in patent or other proprietary rights;25 •quar terly variations in our results of operations and those of our competitors; •failure to meet any guidance that we have previously provided regarding our anticipated results; •changes in earnings estimates or recommendations by securities analysts; •failure to meet securities analysts’ estimates; •our involvement in litigation and developments relating to such litigation; •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 above.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 ourcommon stock. Our common stock is currently traded on the Nasdaq Global Market. The NASDAQ Stock Market LLC (“NASDAQ”) has requirements that a companymust meet in order to remain listed on NASDAQ. We have in the past temporarily fallen out of compliance with NASDAQ listing standards and there can be no assurance that we will continue to meetNASDAQ listing requirements in the future. For example, on March 15, 2016, NASDAQ notified us that we were out of compliance with NASDAQ Listing Rule5450(a)(1), requiring maintenance of a minimum bid price of $1.00 per share. In accordance with Nasdaq Listing Rule 5810(c)(3)(A), if during the 180 calendardays following the date of the notification, or prior to September 12, 2016, the closing bid price of our common stock was at or above $1.00 for a minimum of 10consecutive business days, the Listing Qualifications Staff of NASDAQ (the “Staff”) would provide us with written confirmation of compliance. We did notachieve compliance with the minimum bid price requirement, and on September 13, 2016, we received notice from the Staff that our securities were subject todelisting, based upon non-compliance with the minimum bid price requirement set forth in NASDAQ listing rules. On October 14, 2016, we effected a reverse splitof shares of our common stock, and as a result regained compliance with NASDAQ listing requirements as of November 1, 2016. If future events cause ourcommon stock to be delisted, the liquidity of our common stock would be adversely affected and the market price of our common stock could decrease.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 byissuing equity securities, including under our At Market Issuance Sales Agreement (“ATM”) with Cowen and Company, LLC, our stockholders may experiencesubstantial dilution. We may sell common stock, convertible securities or other equity securities in one or more transactions at prices and in a manner we determinefrom time to time. If we sell common stock, convertible securities or other equity securities in more than one transaction, investors may be materially diluted bysubsequent sales. These sales may also result in material dilution to our existing stockholders, and new investors could gain rights superior to our existingstockholders.We are authorized to issue, without stockholder approval, 1,000,000 shares of preferred stock, of which 5,003 were issued and outstanding as of March 142017, which give other stockholders dividend, conversion, and liquidation rights, among other rights, which may be superior to the rights of holders of our commonstock. In addition, we are authorized to issue, generally without stockholder approval, up to 277,333,332 shares of common stock, of which 7,544,076 were issuedand outstanding as of March 14, 2017. 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 becertain 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 witha 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.26 We may sell additional equity or debt securities to fund our operations, which may result in dilution to our stockholders and impose restrictions on ourbusiness.In order to raise additional funds to support our operations, we may sell additional equity or debt securities, including under our ATM with Cowen andCompany, LLC, which would result in dilution to our stockholders and may impose restrictive covenants that would adversely impact our business. The sale ofadditional equity or convertible debt securities could result in the issuance of additional shares of our capital stock and dilution to all of our stockholders. Theincurrence of indebtedness would result in increased fixed payment obligations and could also result in certain restrictive covenants, such as limitations on ourability to incur additional debt, limitations on our ability to acquire, sell or license intellectual property rights and other operating restrictions that could adverselyimpact our ability to conduct our business. If we are unable to expand our operations or otherwise capitalize on our business opportunities, our business, financialcondition and results of operations could be materially adversely affected and we may not be able to meet our debt service obligations.Our organizational documents contain provisions that may prevent transactions that could be beneficial to our stockholders and may insulate our managementfrom removal.Our charter and by-laws: •require certain procedures to be followed and time periods to be met for any stockholder to propose matters to be considered at annual meetings ofstockholders, 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 andother 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 orpotential 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 apotential acquirer to replace management.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 ourinternal 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 internalcontrols over financial reporting are effective.Companies that file reports with the Securities and Exchange Commission (“SEC”), including us, are subject to the requirements of Section 404 of theSarbanes-Oxley Act of 2002 (“SOX”). Section 404 requires management to establish and maintain a system of internal control over financial reporting, and annualreports on Form 10-K filed under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), must contain a report from management assessing theeffectiveness of our internal control over financial reporting. Ensuring we have adequate internal financial and accounting controls and procedures in place toproduce 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 effectiveinternal financial and accounting controls would cause our financial reporting to be unreliable, could have a material adverse effect on our business, operatingresults, and financial condition, and could cause the trading price of our common stock to fall.We incur significant costs as a result of operating as a public company, which may adversely affect our operating results and financial condition.As a public company, we incur significant accounting, legal and other expenses, including costs associated with our public company reporting requirements.We also anticipate that we will continue to incur costs associated with corporate governance requirements, including requirements and rules under SOX and theDodd-Frank Wall Street Reform and Consumer Protection Act ("Dodd-Frank") among other rules and regulations implemented by the SEC, as well as listingrequirements of NASDAQ. Furthermore, these laws and regulations could make it difficult or costly for us to obtain certain types of insurance, including directorand officer liability insurance, and we may be forced to accept reduced policy limits and coverage or incur substantially higher costs to obtain the same or similarcoverage. The impact of these requirements could also make it difficult for us to attract and retain qualified persons to serve on our Board of Directors, our BoardCommittees or as executive officers.27 New laws and regulations as well as changes to existing laws and regulations a ffecting public companies, including the provisions of SOX and Dodd-Frankand rules adopted by the SEC and NASDAQ, would likely result in increased costs to us as we respond to their requirements. We continue to invest resources tocomply with evolving law s and regulations, and this investment may result in increased general and administrative expense.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 weincur 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 valueagainst 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 ofoperations.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” toutilize its net operating loss carry-forwards (“NOLs”) and certain other tax attributes against any taxable income in taxable periods after the ownership change. Theamount 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 isgenerally 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 ofitems 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 exemptrate (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 theInternal Revenue Code) increases by more than 50 percentage points over the lowest percentage of the shares of such corporation owned, directly or indirectly, bysuch “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 taxattributes 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, 2016, we have excluded the NOLs and research and development creditsthat 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. On February 16, 2017, we completedan equity financing for net proceeds of $24.9 million which may have potentially triggered an additional ownership change under Section 382. We will beanalyzing the effects of the February 2017 financing; if such a change under Section 382 is deemed to have occurred, the use of our NOLs and tax attributes peryear will be further limited.Risks Related to Employees, Location, Data Integrity, and LitigationThe loss of key personnel, including our Chief Executive Officer or Chief Financial Officer, could delay or prevent achieving our objectives.Our product development and business efforts could be affected adversely by the loss of one or more key members of our staff, particularly our executiveofficers: James R. Neal, our Chief Executive Officer and Thomas Burns, our Senior Vice President, Finance and Chief Financial Officer. We currently do not havekey person insurance on any of our employees.28 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 qualifiedscientific and management personnel, particularly in areas requiring specific technical, scientific or medical expertise. After a series of restructuring activities andasset sales during 2016, we had 18 full-time employees as of March 14, 2017. In addition, there are seven employees who will terminate employment on eitherMarch 31, 2017 or June 30, 2017 in connection with the restructuring activities in December 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 abilityto attract and retain employees in the future. If we do not succeed in attracting new personnel and retaining and motivating existing personnel, our operations maysuffer and we may be unable to implement our current initiatives or grow effectively.Calamities, power shortages or power interruptions at our Berkeley headquarters could disrupt our business and adversely affect our operations.Our principal operations are located in Northern California, including our corporate headquarters in Berkeley, California. This location is in an area ofseismic activity near active earthquake faults. Any earthquake, terrorist attack, fire, power shortage or other calamity affecting our facilities may disrupt ourbusiness and could have material adverse effect on our 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 licensees, suppliers, contractors andconsultants are vulnerable to damage from cyber−attacks, computer viruses, unauthorized access, natural disasters, terrorism, war and telecommunication andelectrical failures. We could experience failures in our information systems and computer servers, which could be the result of a cyber−attack and could result in aninterruption of our normal business operations and require substantial expenditure of financial and administrative resources to remedy. System failures, accidents orsecurity breaches can cause interruptions in our operations and can result in a material disruption of our development programs and other business operations. Theloss of clinical trial data from completed or future clinical trials could result in delays in our regulatory approval efforts and significantly increase our costs torecover or reproduce the data. Similarly, we rely on third parties to manufacture our product candidates, and conduct clinical trials of our product candidates, andsimilar 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 wereto 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 thedevelopment of any of our product candidates could be delayed or otherwise adversely affected.Data breaches and cyber-attacks could compromise our intellectual property or other sensitive information and cause significant damage to our business andreputation.In the ordinary course of our business, we maintain sensitive data on our networks, including our intellectual property and proprietary or confidentialbusiness information relating to our business and that of our customers and business partners. The secure maintenance of this information is critical to our businessand reputation. We believe companies have been increasingly subject to a wide variety of security incidents, cyber-attacks and other attempts to gain unauthorizedaccess. 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 begeneric, or they may be custom-crafted against our information systems. 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 ordisclosure of our information or intellectual property could compromise our intellectual property and expose sensitive business information. A data security breachcould also lead to public exposure of personal information of our clinical trial patients, customers and others. Cyber-attacks could cause us to incur significantremediation costs, result in product development delays, disrupt key business operations and divert attention of management and key information technologyresources. These incidents could also subject us to liability, expose us to significant expense and cause significant harm to our reputation and business.29 We and certain of our officers and directors have been named as defendants in shareholder lawsuits. These lawsuits, and potential similar or rela ted 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 companiesoften 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, captionedMarkette v. XOMA Corp., et al. (Case No. 3:15-cv-3425) naming as defendants us and certain of our officers. The complaint asserts that all defendants violatedSection 10(b) of the Exchange Act and SEC Rule 10b-5, by making materially false or misleading statements regarding our EYEGUARD-B study betweenNovember 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 classcertification, an award of unspecified compensatory damages, an award of reasonable costs and expenses, including attorneys’ fees, and other further relief as theCourt may deem just and proper. On May 13, 2016, the Court appointed a lead plaintiff and lead counsel. The lead plaintiff filed an amended complaint on July 8,2016 asserting the same claims and adding a former director as a defendant. On September 2, 2016, defendants filed a motion to dismiss with prejudice theamended complaint. Plaintiff filed his opposition to the motion to dismiss on October 7, 2016. Defendants filed a reply in support of their motion to dismiss onOctober 21, 2016. The judge in the case has advised that he will rule on the motion based on those pleadings, but has not yet issued a ruling. Based on a review ofthe allegations, management believes that the plaintiff’s allegations are without merit, and intends to vigorously defend against the claims. Currently, we do notbelieve that the outcome of this matter will have a material adverse effect on our business or financial condition, although an unfavorable outcome could have amaterial adverse effect on our results of operations for the period in which such a loss is recognized. We cannot reasonably estimate the possible loss or range ofloss that may arise from this lawsuit.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 us 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 andmisleading statements related to our EYEGUARD-B study. The plaintiff is seeking unspecified monetary damages and other relief, including reforms andimprovements to our corporate governance and internal procedures. This action is currently stayed pending further developments in the securities classaction. 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 NorthernDistrict 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), againstcertain 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 thedissemination of allegedly false and misleading statements related to the our EYEGUARD-B study. Plaintiffs seek unspecified monetary damages and other reliefincluding reforms and improvements to our corporate governance and internal procedures. Both actions are currently stayed pending further developments in thesecurities class action. Management believes the allegations have no merit and intends to vigorously defend against the claims. 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 usand/or our officers and directors as defendants. These and any other related lawsuits are subject to inherent uncertainties, and the actual defense and dispositioncosts will depend upon many unknown factors. The outcome of these lawsuits are uncertain. We could be forced to expend significant resources in the defense ofthese 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 toestimate 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 orthe 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 ispossible 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 actionscould 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 financialposition.Monitoring, initiating and defending against legal actions, including the currently pending litigation, are time-consuming for our management, are likely tobe 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 insome 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 couldlead to increased volatility in our stock price and a decrease in the value of an investment in our common stock. 30 Item 1B.Unresolved Staff CommentsNone. Item 2.PropertiesOur corporate headquarters and research laboratories are located in Berkeley and Emeryville, California. We currently lease two buildings that house ouroffice space and research and development laboratories. Our building leases expire in the period from 2021 to 2023, and total minimum lease payments due fromJanuary 2017 until expiration of the leases is $21.4 million. We have the option to renew our lease agreements for up to two successive five-year periods. Item 3.Legal ProceedingsOn July 24, 2015, a purported securities class action lawsuit was filed in the United States District Court for the Northern District of California captionedMarkette 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 thatall 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 ormisleading statements regarding the Company’s EYEGUARD-B study between November 6, 2014 and July 21, 2015. The plaintiff also alleges that Messrs. Varianand Rubin violated Section 20(a) of the Exchange Act. The plaintiff seeks class certification, an award of unspecified compensatory damages, an award ofreasonable costs and expenses, including attorneys’ fees, and other further relief as the Court may deem just and proper. On May 13, 2016, the Court appointed alead plaintiff and lead counsel. The lead plaintiff filed an amended complaint on July 8, 2016 asserting the same claims and adding a former director as a defendant.On September 2, 2016, defendants filed a motion to dismiss with prejudice the amended complaint. Plaintiff filed his opposition to the motion to dismiss onOctober 7, 2016. Defendants filed a reply in support of their motion to dismiss on October 21, 2016. The judge in the case has advised that he will rule on themotion based on those pleadings, but has not yet issued a ruling. Based on a review of the allegations, the Company believes that the plaintiff’s allegations arewithout 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 allegedlyfalse and misleading statements related to the Company’s EYEGUARD-B study. The plaintiff is seeking unspecified monetary damages and other relief, includingreforms and improvements to our corporate governance and internal procedures. This action is currently stayed pending further developments in the securities classaction 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 NorthernDistrict 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), againstcertain 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 thedissemination of allegedly false and misleading statements related to the Company’s EYEGUARD-B study. Plaintiffs seek unspecified monetary damages andother relief including reforms and improvements to our corporate governance and internal procedures. Both actions are currently stayed pending furtherdevelopments in the securities class action. Management believes the allegations have no merit and intend to vigorously defend against the claims. Item 4.Mine Safety DisclosuresNot applicable. 31 PART II Item 5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity SecuritiesMarket for Registrant’s Common EquityOur common stock trades on The Nasdaq Global Market tier of the Nasdaq Stock Market LLC (“NASDAQ”) under the symbol “XOMA.” All references tonumbers of common shares and per-share information in this Annual Report have been adjusted retroactively to reflect the Company’s 1-for-20 reverse stock spliteffective October 17, 2016. The following table sets forth the quarterly range of high and low reported sale prices of our common stock on NASDAQ for theperiods indicated: Price Range High Low 2016 First Quarter $27.20 $13.80 Second Quarter $19.00 $8.80 Third Quarter $14.00 $8.80 Fourth Quarter $9.60 $4.16 2015 First Quarter $86.60 $64.40 Second Quarter $88.20 $58.40 Third Quarter $98.60 $13.80 Fourth Quarter $40.60 $18.00 On March 14, 2017, there were 216 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 depositedinto participant accounts at DTC and are therefore considered to be held of record by Cede & Co. as one stockholder.Dividend PolicyWe have not paid dividends on our common stock. We currently intend to retain any earnings for use in the operations of our business. We, therefore, do notanticipate paying cash dividends on our common stock in the foreseeable future. In addition, our loan agreement with Hercules generally restricts the declarationand payment of cash dividends. Recent Sales of Unregistered SecuritiesExcept 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(“SEC”), during the year ended December 31, 2016, there were no unregistered sales of equity securities by us during the year ended December 31, 2016. 32 Item 7.Management’s Discussion and Analysis of Financial Condition and Results of OperationsOverviewXOMA Corporation, (“XOMA”), a Delaware corporation, has a long history of discovering and developing innovative therapeutics derived from its uniqueplatform of antibody technologies. We have typically sought to license these therapeutic assets to our licensees who take on the responsibilities of later stagedevelopment, approval and commercialization. In addition, we have licensed our antibody technologies on a non-exclusive basis to other companies who desire toaccess this platform for their own discovery efforts.In 2016, we dedicated our research and development efforts to advancing our portfolio of product candidates that have the potential to treat a variety ofendocrine diseases, including advancing the development of X358 for the treatment of congenital hyperinsulinism (“CHI”) and hypoglycemia in hyperinsulinemicpatients post-bariatric surgery (“PBS”). We are evolving our strategy to be focused on developing or acquiring revenue generating assets and coupling them with alean corporate infrastructure. Our goal is to create a sustainably profitable business and generate meaningful value for our stockholders. Since our business model isbased on the goal of out-licensing to other pharmaceutical companies for them to commercialize and market any resultant products, we expect a significant portionof our future revenue will be based on payments we may receive from our licensees.Our asset base includes antibodies with unique properties including several that interact at allosteric sites on a specific protein rather than the orthosteric, oractive, sites. These compounds are designed to either enhance or diminish the target protein’s activity as desired. We believe allosteric-modulating antibodies maybe more selective or offer a safety advantage in certain disease indications when compared to more traditional modes of action.Significant Developments in 2016X358 •In September 2016, the initial data from our ongoing Phase 2 X358 proof-of-concept (“POC”) studies indicated that X358 is exhibiting an inhibitionon insulin signaling. These studies, initiated in April 2016, are evaluating the safety and clinical pharmacology of X358 in patients with CHI and inpatients who experience dangerously low blood glucose levels (hypoglycemia) after undergoing gastric bypass surgery. In January 2017, weannounced that we have established POC for X358 in CHI and hypoglycemia in hyperinsulinemic patients PBS. The CHI acute studies have mettheir objectives of establishing initial safety and X358 POC in CHI patients aged 12 and up across several dosing levels. The PBS study hascompleted dosing in the single-dose cohorts and has also met its objectives. In February 2017, we initiated a multi-dose study in PBS. •In October 2016, the United Kingdom’s Medicines and Healthcare Products Regulatory Agency (“MHRA”) accepted in principle our proposal toinitiate a multi-dose Phase 2 clinical study of X358 in children older than two who are diagnosed with CHI and the study was approved by theMHRA in December 2016. This multi-dose study is under planning in Q1 2017 and the site is expected to be ready for first dosing in the UK in Q22017. Submissions of this study are underway in Germany, Denmark and Israel as well.Sale Future Revenue Streams •On December 21, 2016, we entered into two Royalty Interest Acquisition Agreements (together, the “Acquisition Agreements”) with HealthCareRoyalty Partners II, L.P. (“HCRP”). Under the first Acquisition Agreement, we sold our right to receive milestone payments and royalties on futuresales of products subject to a License Agreement, dated August 18, 2005, between XOMA and Wyeth Pharmaceuticals (now Pfizer, Inc.) for anupfront cash payment of $6.5 million, plus potential additional payments totaling $4.0 million in the event that three specified net sales milestonesare met by Pfizer in 2017, 2018 and 2019. Under the second Acquisition Agreement, we sold all rights to royalties under an Amended and RestatedLicense Agreement dated October 27, 2006 between XOMA and Dyax Corp. for a cash payment of $11.5 million.Amendment to the Hercules Loan Agreement •On December 21, 2016, we entered into Amendment No. 1 (the “Amendment”) to the Hercules Loan Agreement. Under the Amendment, Herculesagreed to release its security interest in the assets subject to the Acquisition Agreements. In turn, in January of 2017, we paid $10.0 million of theoutstanding principal balance owed to Hercules. After payment of this amount, the outstanding principal balance under the Hercules LoanAgreement was reduced to $6.9 million.35 Restructuring •In December 2016, we effected a restructuring of XOMA’s business. The restructuring included a reduction-in-force in which we reduced ourheadcount by 57 employees. The restructuring was based on our decision to focus our efforts on clinical development, with an initial focus onadvancing our X358 clinical program. Subsequent to the restructuring in December 2016, we have revised our strategy to prioritize out-licensingactivities.In addition, effective December 21, 2016, John Varian retired from his position as Chief Executive Officer and was replaced in that position by JimNeal. Mr. Varian is entitled to a severance payment and payments for benefits and outplacement services pursuant to the terms of his retentionbenefit agreement.Sale of Biodefense Assets •In March 2016, in connection with the November 4, 2015 asset purchase agreement with Nanotherapeutics, Inc. (“Nanotherapeutics”), we effectedthe novation of our contract with the National Institute of Allergy and Infectious Diseases (“NIAID”), and completed the transfer of certain relatedthird-party service contracts and materials, and the grant of exclusive and non-exclusive licenses for certain of our patents and general know-how toNanotherapeutics. We are eligible to receive contingent consideration up to a maximum of $4.5 million in cash and 23,008 shares of common stockof Nanotherapeutics, based upon Nanotherapeutics achieving certain specified future operating objectives. In addition, we are eligible to receive 15%royalties on net sales of any future Nanotherapeutics products covered by or involving the related patents or know-how. In February 2017, weexecuted an Amendment and Restatement to both the asset purchase agreement and license agreement primarily to (i) remove the issuance of 23,008shares of common stock of Nanotherapeutics under the asset purchase agreement, and (ii) revise the payment schedule related to the timing of the$4.5 million cash payments due under the license agreement. Of the $4.5 million, $3.0 million is contingent upon Nanotherapeutics achieving certainspecified future operating objectives.Critical Accounting EstimatesThe accompanying discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements and therelated disclosures, which have been prepared in accordance with generally accepted accounting principles in the United States. The preparation of theseconsolidated financial statements requires us to make estimates, assumptions and judgments that affect the reported amounts in our consolidated financialstatements and accompanying notes. On an ongoing basis, we evaluate our estimates, assumptions and judgments described below that have the greatest potentialimpact 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, theresults of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Accountingassumptions and estimates are inherently uncertain and actual results may differ materially from these estimates under different assumptions or conditions.While our significant accounting policies are more fully described in Note 2 to the consolidated financial statements, we believe the following policies to bethe most critical to an understanding of our financial condition and results of operations because they require us to make estimates, assumptions and judgmentsabout matters that are inherently uncertain.Revenue RecognitionLicense and Collaborative FeesRevenue from non-refundable license, technology access or other payments under license and collaborative agreements where we have a continuingobligation to perform is recognized as revenue over the estimated period of the continuing performance obligation. We estimate the performance period at theinception of the arrangement and re-evaluate it each reporting period. Management makes its best estimate of the period over which it expects to fulfill theperformance obligations, which may include clinical development activities. Given the uncertainties of research and development collaborations, significantjudgment is required to determine the duration of the performance period. This re-evaluation may shorten or lengthen the period over which the remaining revenueis 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 performanceof the partner. For such contingent payments, we recognize the payments as revenue upon completion of the milestone event, once confirmation is received fromthe third party, provided that collection is reasonably assured and the other revenue recognition criteria have been satisfied.36 Contract RevenueContract revenue for research and development involves providing research and development services to collaborative partners or others. Costreimbursement revenue under collaborative agreements is recognized as the related research and development costs are incurred, as provided for under the terms ofthese agreements. Revenue for certain contracts is accounted for by a proportional performance, or output-based, method where performance is based on estimatedprogress toward elements defined in the contract. The amount of contract revenue and related costs recognized in each accounting period are based on estimates ofthe proportional performance during the period. Adjustments to estimates based on actual performance are recognized on a prospective basis and do not result inreversal 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 thecontracting party at any time. Under our contracts with NIAID, a part of the National Institute of Health (“NIH”), we bill using NIH provisional rates and thus aresubject 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 developedfinal 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 thegovernment under provisional rates. Final rates were settled for one contract resulting in the recognition of revenue of $2.0 million in 2012. In 2014, uponcompletion of a NIAID review of hours and external expenses for the period spanning from 2008 to 2013, we agreed to exclude certain hours and external expenseresulting in a $1.8 million adjustment, which reduced deferred revenue and accounts receivable. The remaining deferred revenue in connection with the 2011 NIHrate audit will be recognized upon negotiation with and approval by NIH.Upfront fees associated with contract revenue are recorded as license and collaborative fees and are recognized ratably over the expected benefit periodunder the arrangement. Given the uncertainties of research and development collaborations, significant judgment is required to determine the duration of thearrangement.Sale of Future Revenue StreamsIn December 2016, we sold our rights to receive milestone payments and royalties on future sales of products under our license agreement with Pfizer andour right to receive royalties on future sales of products under our license agreement with Dyax Corp. to HCRP. In the circumstance where we have sold our rightsto future milestones and royalties under a license agreement and also maintain limited continuing involvement in the arrangement (but not significant continuinginvolvement in the generation of the cash flows that are due to the purchaser), we defer recognition of the proceeds we receive for the milestone or royalty streamand recognize such deferred revenues as contract and other revenue over the life of the underlying license agreement. We recognize this revenue under the "units-of-revenue" method. Under this method, amortization for a reporting period is calculated by computing a ratio of the proceeds received from the purchaser to thetotal payments expected to be made to the purchaser over the term of the agreement, and then applying that ratio to the period’s cash payment.Estimating the total payments expected to be received by the purchaser over the term of such arrangements requires management to use subjective estimatesand assumptions. Changes to our estimate of the payments expected to be made to the purchaser over the term of such arrangements could have a material effect onthe amount of revenues we recognize in any particular period.Research and Development ExpensesWe expense research and development costs as incurred. Research and development expenses consist of direct costs such as salaries and related personnelcosts, and material and supply costs, and research-related allocated overhead costs, such as facilities costs. In addition, research and development expenses includecosts related to clinical trials. From time to time, research and development expenses may include up-front fees and milestones paid to collaborative partners for thepurchase of rights to in-process research and development. Such amounts are expensed as incurred.37 Our accrual for clinical trials is based on estimates of the services received and efforts expended under contracts with clinical trial centers and clinicalresearch organizations. Payments under the contracts depend on factors such a s the achievement of certain events, successful enrollment of patients, andcompletion of portions of the clinical trial or similar conditions. We may terminate these contracts upon written notice and we are generally only liable for actualeffort expended by the organizations to the date of termination, although in certain instances we may be further responsible for termination fees and penalties. Wemake estimates of our accrued expenses as of each balance sheet date based on the facts and circumstances k nown to us at that time. Expenses resulting fromclinical 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 priorperiod accrued estimates for clinical tria l activities through December 31, 2016.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 thepotential disease indication and the terms of any collaborative or development arrangements with other companies or entities. After successful conclusion of all ofthese steps, regulatory filings for approval to market the products must be completed, including approval of manufacturing processes and facilities for the product.Stock-based CompensationStock-based compensation expense for stock options and other stock awards is estimated at the grant date based on the award’s fair value-basedmeasurement and is recognized on a straight-line basis over the award’s vesting period, assuming appropriate forfeiture rates. The valuation of stock-basedcompensation awards is determined at the date of grant using the Black-Scholes option pricing model (the “Black-Scholes Model”). This model requires highlycomplex and subjective inputs, such as the expected term of the option, expected volatility, and risk-free interest rate. Further, the forfeiture rate also impacts theamount of aggregate compensation. These inputs are subjective and generally require significant analysis and judgment to develop. Our current estimate ofvolatility 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 ofoptions granted in the future could increase, thereby increasing stock-based compensation cost recognized in future periods. To establish an estimate of expectedterm, we consider the vesting period and contractual period of the award and our historical experience of stock option exercises, post-vesting cancellations andvolatility. To establish an estimate of forfeiture rate, we consider our historical experience of option forfeitures and terminations. The risk-free rate is based on theyield available on United States Treasury zero-coupon issues. We review our valuation assumptions quarterly and, as a result, we likely will change our valuationassumptions 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 inputestimates. These changes could impact our fair value-based measurement of stock options granted in the future. Changes in the fair value-based measurement ofstock awards could materially impact our operating results.WarrantsWe have issued warrants to purchase shares of our common stock in connection with financing activities. We account for some of these warrants as aliability 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 aresubjective and require significant analysis and judgment to develop. For the estimate of the expected term, we use the full remaining contractual term of thewarrant. We determine the expected volatility based on the historical stock price volatility of XOMA’s underlying stock. The assumptions associated withcontingent warrant liabilities are reviewed each reporting period and changes in the estimated fair value of these contingent warrant liabilities are recognized asgain or loss in the revaluation of contingent warrant liabilities line in the consolidated statement of comprehensive loss.Results of OperationsRevenuesTotal revenues for the years ended December 31, 2016, 2015, and 2014, were as follows (in thousands): Year Ended December 31, 2015-2016 2014-2015 2016 2015 2014 Change Change License and collaborative fees $3,296 $49,064 $5,683 $(45,768) $43,381 Contract and other $2,268 6,383 13,183 $(4,115) (6,800)Total revenues $5,564 $55,447 $18,866 $(49,883) $36,581 38 License and Collaborative FeesLicense and collaborative fees include fees and milestone payments related to the out-licensing of our product candidates and technologies. The primarycomponents of license and collaboration fees in 2016 were $2.0 million in upfront and milestone payments relating to various out-licensing arrangements, $0.7million in annual maintenance fees related to various out-licensing arrangements and $0.6 million in revenue recognized related to the collaboration agreement withServier, which was terminated in March 2016. The $2.0 million of upfront and milestone payments included a $1.5 million fee for a phage display library licensedelivered during the first quarter of 2016.The primary components of license and collaboration fees in 2015 were $46.3 million in upfront and milestone payments relating to various out-licensingarrangements, $1.6 million in annual maintenance fees relating to various out-licensing arrangements and $1.2 million in revenue recognized related to the loanagreement with Servier. The $46.3 million included $37.0 million upfront payment from Novartis, $5.0 million upfront payment from Novo Nordisk and $3.8million 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.Contract and Other RevenuesContract and other revenues include agreements where we have provided contracted research and development services to our contract and collaborationpartners, including Servier and NIAID. Contract and other revenues also include royalties. The following table shows the activity in contract and other revenues forthe years ended December 31, 2016, 2015, and 2014 (in thousands): Year Ended December 31, 2015-2016 2014-2015 2016 2015 2014 Change Change NIAID $1,082 $5,084 $9,565 $(4,002) $(4,481)Servier 586 1,178 3,523 (592) (2,345)Royalties and other 600 121 95 479 26 Total contract and other revenues $2,268 $6,383 $13,183 $(4,115) $(6,800) The 2016 decrease in contract and other revenues, as compared with 2015 was primarily due to the novation of our NIAID contract to Nanotherapeutics inMarch 2016, discontinuation of the gevokizumab studies under our collaboration agreement with Servier in the third quarter of 2015 and the termination of thecollaboration agreement with Servier in March 2016. The 2015 decrease in contract and other revenues, as compared with 2014, was primarily due to reduced activity under our existing NIAID contracts anddecreased reimbursements from Servier under our collaboration agreement due to the discontinuation of the gevokizumab studies under our collaborationagreement with Servier in the third quarter of 2015.The generation of future revenues related to license, milestone, and contract revenues is dependent on our ability to attract new licensees to our antibodytechnologies and the achievement of milestones or product sales by our existing licensees.Research and Development ExpensesResearch and development expenses were $44.2 million in 2016, compared with $70.9 million in 2015 and $80.7 million in 2014. The decrease of $26.7million in 2016, as compared with 2015, was primarily due to a decrease of $13.7 million in salaries and related expenses, a decrease of $6.8 million in clinical trialcosts , a decrease of $2.2 million in consulting services due to the termination of the EYEGUARD global Phase 3 program in the third quarter of 2015 andgevokizumab in pyoderma gangrenosum (“PG”) global Phase 3 program in the first quarter of 2016, and a decrease of $0.8 million in depreciation and facilityexpenses due to the sale of our manufacturing facility to Agenus in December 2015. The decrease of $9.8 million in 2015, as compared with 2014, was primarilydue 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 millionin clinical trial costs related to spending on our erosive osteoarthritis of the hand studies in 2014, and a decrease of $1.1 million in research and developmentmaterials costs.39 Salaries and related personnel costs are a significant component of research and development expenses. We recorded $15.0 million in research anddevelopment salaries and employee-related expenses in 2016, compared with $28.7 million in 2015 and $31.8 million in 2014. Included in these expenses for 2016were $11.2 million for salaries and benefits, $1.0 million for bonus expense and $2.8 million for stock-based compensation, which is a non-cash expe nse. Thedecrease of $13.7 million in 2016, as compared with 2015, was primarily due to a decrease of $10.6 million in salaries and benefits costs due to fewer employeesresulting from our 2015 restructuring activities , a decrease of $0.9 million in bonus expense and a decrease of $2.2 million in stock-based compensation.We recorded $28.7 million in research and development salaries and employee-related expenses in 2015, compared with $31.8 million in 2014. Included inthese 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 anon-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 adecrease 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 expensefor forfeitures of stock awards related to our restructuring activities in the second half of 2015.Our research and development activities can be divided into earlier-stage programs and later-stage programs. Earlier-stage programs include molecularbiology, process development, pilot-scale production and preclinical testing. Later-stage programs include clinical testing, regulatory affairs and manufacturingclinical supplies. The costs associated with these programs are summarized below (in thousands): Year Ended December 31, 2016 2015 2014 Earlier stage programs $11,834 $39,495 $28,327 Later stage programs 32,400 31,357 52,421 Total $44,234 $70,852 $80,748 Our research and development activities also can be divided into those related to our internal projects and those projects related to collaborative and contractarrangements. The costs related to internal projects versus collaborative and contract arrangements are summarized (in thousands): Year Ended December 31, 2016 2015 2014 Internal projects $42,845 $50,206 $51,281 Collaborative and contract arrangements 1,389 20,646 29,467 Total $44,234 $70,852 $80,748 In 2016, X358, for which we incurred the largest amount of expense, accounted for between 50% and 60% of our total research and development expenses.The gevokizumab program and our endocrine research-stage programs each accounted for between 10% and 20% of our total research and development expenses.Each of our remaining development programs accounted for less than 10% of our total research and development.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 totalresearch and development expenses. A second development program, XMet, accounted for more than 30% but less than 40% of our total research and developmentexpenses. 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 totalresearch and development expenses. A second development program, XMet, accounted for more than 10% but less than 20% of our total research and developmentexpenses and a third development program, 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 2017 will be reduced as compared with 2016 levels due to our 2016 restructuring activities and furtherresearch and development reductions planned for 2017.40 Selling, General and Administrative ExpensesSelling, general and administrative expenses include salaries and related personnel costs, facilities cost and professional fees. In 2016, selling, general andadministrative expenses were $18.3 million compared with $20.6 million in 2015 and $19.9 million in 2014. The decrease of $2.3 million in 2016 as compared with2015 was primarily due to a $2.4 million decrease in salaries and related personnel costs due to fewer employees resulting from our 2015 restructuring activities, ofwhich $0.5 million was a decrease in stock-based compensation, which is a non-cash expense.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 expenseand 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 $0.7million related to the reversal of expense for forfeitures of stock awards related to our restructuring activities in the second half of 2015.We expect selling, general and administrative expenses in 2017 to be reduced as compared to 2016 levels due to our 2016 restructuring activities.Restructuring and Other ChargesOn December 21, 2016, we announced a restructuring of our business based on our decision to focus our efforts on clinical development, with an initialfocus on the X358 clinical programs. The restructuring included a reduction-in-force in which we terminated 57 employees, which was implemented in December2016. Subsequent to the December 2016 restructuring action, we have revised our strategy to prioritize out-licensing activities. During the year ended December31, 2016, we recorded a charge of $3.8 million related to severance, other termination benefits and outplacement services. In addition, we recognized an additionalrestructuring charge of $0.6 million in stock-based compensation resulting from the acceleration of vesting of stock awards granted to a former executive under hisretention benefit agreement. In connection with this restructuring, we recorded an asset impairment charge of $0.2 million for leasehold improvements that have nofuture use. There were no impairment charges recognized during the years ended December 31, 2015 and 2014.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 meetthe primary endpoint of time to first acute ocular exacerbation. In August 2015, we announced our intention to end the EYEGUARD global Phase 3 program. OnAugust 21, 2015, in connection with our efforts to lower operating expenses and preserve capital while continuing to focus on our endocrine product pipeline, weimplemented a restructuring plan that included a workforce reduction resulting in the termination of 52 employees during the second half of 2015. During the yearsended December 31, 2016 and 2015, we recorded a credit of $32,000 and a charge of $2.9 million, respectively, related to severance, other termination benefits andoutplacement services. In addition, we recognized additional restructuring charges of $29,000 and $0.8 million in contract termination costs in the years endedDecember 31, 2016 and 2015, respectively, which primarily include costs in connection with the discontinuation of the EYEGUARD studies.In 2014, we recorded restructuring charges of $0.1 million for facility costs related to restructuring activities initiated in 2012.Other Income (Expense)Interest ExpenseAmortization of debt issuance costs and discounts are included in interest expense. Interest expense is shown below for the years ended December 31, 2016,2015, and 2014 (in thousands): Year Ended December 31, 2015-2016 2014-2015 2016 2015 2014 Change Change Hercules loan $2,628 $2,223 $— $405 $2,223 Servier loan 892 1,083 2,330 (191) (1,247)GECC term loan — 548 1,638 (548) (1,090)Novartis note 405 329 312 76 17 Other 21 11 23 10 (12)Total interest expense $3,946 $4,194 $4,303 $(248) $(109) 41 Interest expense related to the Servier loan and General Electric Capital Corporation (“GECC”) term loan decreased by $0.2 million and $0.5 million,respectively in 2016, compared with 2015. The decrease was due to the payment of €3.0 million in principal under the Servier loan in January 2016 and theextinguishment of the GECC term loan in February 2015. Thi s decrease was partially offset by an increase of $0.4 million in interest expense due under our termloan with Hercules Technology Growth Capital, Inc. (“Hercules”) that was entered into in February 2015. 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. Thedecrease 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 theextended 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 ininterest expense due under our $20.0 million term loan with Hercules in February 2015. A portion of the proceeds from the Hercules Term Loan was used to repayour outstanding loan with GECC and we recorded a loss of $0.4 million upon the extinguishment of the GECC term loan. We expect interest expense during 2017 to decrease as compared with 2016 due to the decrease in the principal balances of the Hercules and Servier loans.Other Income, NetThe following table shows the activity in other income, net for the years ended December 31, 2016, 2015, and 2014 (in thousands): Year Ended December 31, 2015-2016 2014-2015 2016 2015 2014 Change Change Other income, net Gain on sale of business $— 3,505 $— $(3,505) $3,505 Unrealized foreign exchange gain 489 1,870 2,447 (1,381) (577)Sublease income 398 — — 398 — Loss on impairment of investment (171) — — (171) — Other 794 125 (386) 669 511 Total other income, net $1,510 $5,500 $2,061 $(3,990) $3,439 Unrealized foreign exchange gains for the years ended December 31, 2016, 2015, and 2014 are primarily related to the re-measurement of the Servier loan.The sublease income in 2016 is related to the sublease arrangements executed with Agenus in December 2015 and Nanotherapeutics in March 2016. In 2016, werecognized an other-than-temporary impairment of $0.2 million related to a non-marketable cost method investment that we determined was impaired. Otherincome in 2016 primarily consist of $0.4 million generated from our transition service agreements with Agenus and Nanotherapeutics. The gain on sale of businessfor 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 certainequipment, 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 andprocesses necessary to generate output from a market participant’s perspective. Accordingly, we have determined that such assets qualify as a business.Revaluation of Contingent Warrant LiabilitiesWe have issued warrants that contain provisions that are contingent on the occurrence of a change in control, which could conditionally obligate us torepurchase 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 theseprovisions, 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 eachreporting 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, 2016 using the Black-Scholes Model and recorded a $7.5 million reduction in the estimated fairvalue as a gain on the revaluation of contingent warrant liabilities line of our consolidated statement of comprehensive loss for the year ended December 31, 2016.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, 2016 ascompared to December 31, 2015. We revalued the warrants at December 31, 2015 and 2014 and recorded a $15.6 million and a $39.5 million reduction in theestimated fair value in 2015 and 2014, respectively, as gains on the revaluation of contingent warrant liabilities line of our consolidated statements ofcomprehensive loss for the years ended December 31, 2015 and 2014.42 The December 2014 warrants expired in December 2016. During the year ended December 31, 2016, we revalued the December 2014 warrants using theBlack-Scholes Model and recorded a $3.0 million reduction in the estimated fair value as a gain on the revaluation of contingent warrant liabilities line of ourconsolidated 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 ourcommon stock during 2016 as compare d to December 31, 2015. We revalued the warrants at December 31, 2015 and 2014 and recorded a $2.2 million and a $5.1million reduction in the estimated fair value in 2015 and 2014, respectively, as gains on the revaluation of contingent warrant liabilitie s line of our consolidatedstatements of comprehensive loss for the years ended December 31, 2015 and 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 inFebruary 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 asa 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 ResourcesThe following table summarizes our cash, cash equivalents and marketable securities, our working capital and our cash flow activities for each of theperiods presented (in thousands): December 31, 2016 2015 Change Cash and cash equivalents $25,742 $65,767 $(40,025)Marketable securities $— $496 $(496)Working (deficit) capital $(5,346) $48,924 $(54,270) Year Ended December 31, 2015-2016 2014-2015 2016 2015 2014 Change Change Net cash used in operating activities $(33,689) $(30,892) $(78,282) $(2,797) $47,390 Net cash provided by investing activities 612 4,450 19,675 (3,838) (15,225)Net cash (used in) provided by financing activities (6,942) 13,801 35,560 (20,743) (21,759)Effect of exchange rate changes on cash (6) (37) (167) 31 130 Net decrease in cash and cash equivalents $(40,025) $(12,678) $(23,214) $(27,347) $10,536 Cash Used in Operating ActivitiesThe increase in net cash used in operating activities in 2016 as compared to 2015 was primarily due to lower cash received from revenue sources in 2016 ascompared with 2015. This increase was partially offset by lower salaries and related costs resulting from our 2015 restructuring activities combined with decreasedresearch and development spending related to manufacturing and clinical trial costs primarily due to the discontinuation of the gevokizumab studies under ourcollaboration agreement with Servier in the third quarter of 2015 and the termination of the collaboration agreement with Servier in March 2016. Also contributingto the decrease in clinical trial costs was the termination of the gevokizumab PG global Phase 3 program in March 2016.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 millionupfront fee from Novartis, combined with decreased R&D spending related to internal and external manufacturing costs and a decrease in clinical trial costsprimarily resulting from the completion in 2014 of our Phase 2 study in EOA.Cash Provided by Investing ActivitiesNet cash provided by investing activities for the year ended December 31, 2016 was primarily related to proceeds from the sale of marketable securities of$0.6 million.Net cash provided by investing activities for the year ended December 31, 2015 was primarily related to proceeds from the sale of our manufacturingfacility 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.43 Cash (Used in) Provided by Financing ActivitiesNet cash used in financing activities for the year ended December 31, 2016 was primarily related to $6.9 million of principal payments on our loans withServier and Hercules.Net cash provided by financing activities for the year ended December 31, 2015 was primarily related to proceeds from the Hercules Term Loan of $20.0million 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 theGECC 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 ofcommon 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.ATM AgreementOn 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 anaggregate 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 samedate. 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, includingwithout 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 grossproceeds of the sales price of all shares sold through it as sales agent under the 2015 ATM Agreement. Offering costs, consisting of legal, accounting, and filingfees, incurred in connection with the 2015 ATM Agreement are capitalized. The capitalized offering costs will be offset against proceeds from the sale of commonstock under this agreement. In the event the offering is terminated, all capitalized offering costs will be expensed. As of December 31, 2016, $0.2 million ofoffering costs were capitalized, which are included in prepaid expenses and other current assets in the consolidated balance sheet. For the year ended December 31,2016, we sold 10,365 shares of common stock under this agreement for aggregate gross proceeds of $56,000. Total offering costs of $56,000 were offset against theproceeds upon sale of common stock.Hercules Term LoanThe Company and Hercules entered into the Hercules Loan Agreement (“Hercules Term Loan”) on February 27, 2015, under which we borrowed $20.0million. 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 WallStreet Journal minus 7.25%, or (ii) 9.40%. The payments under the Hercules Term Loan were interest only until June 1, 2016. The interest-only period wasfollowed by equal monthly payments of principal and interest amortized over a 30-month schedule through the scheduled maturity date of September 1, 2018. Assecurity for its obligations under the Hercules Term Loan, we granted a security interest in substantially all of our existing and after-acquired assets, excluding ourintellectual 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 may pay Hercules a prepayment charge equal to 1.00% of the amount. The Hercules Term Loanincludes 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 $1.2million 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.44 In connection with the Hercules Term Loan, we issued unregistered warrants that entit le Hercules to purchase up to an aggregate of 9,063 unregisteredshares of XOMA common stock at an exercise price equal to $66.20 per share. These warrants were exercisable immediately and have a five-year term expiring inFebruary 2020. We allocated the a ggregate proceeds of the Hercules Term Loan between the warrants and the debt obligation. The estimated fair value of thewarrants issued to Hercules of $0.5 million was determined using the Black-Scholes Model and was recorded as a discount to the debt ob ligation. The discount isbeing 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, 2016, the net carrying value of the Hercules Ter m Loan was $16.9 million.On December 21, 2016, we entered into Amendment No. 1 (the “Amendment”) to the Hercules Loan Agreement. Under the Amendment, Hercules agreedto release its security interest in the assets subject to the Acquisition Agreements. In turn, we paid $10.0 million of the current outstanding principal balance owedto Hercules in January 2017. The $10.0 million payment was not subject to any prepayment charge.Servier LoanIn 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 issecured by an interest in XOMA’s intellectual property rights to all gevokizumab indications worldwide, excluding certain rights in the U.S. and Japan. Interest iscalculated 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 andJuly of each year. The interest rate for the initial interest period was 3.22% and was reset semi-annually ranging from 1.81% to 3.83%. Interest for the six-monthperiod from mid-July 2016 through mid-January 2017 was reset to 1.81%. In January 2016 and July 2016, we made payments of $0.1 million in accrued interest toServier. In addition, the loan becomes immediately due and payable upon certain customary events of default. On January 9, 2015, Servier and we entered intoAmendment 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 itsintention to terminate the Collaboration Agreement, as amended and return the gevokizumab rights to XOMA. The termination, which became effective on March25, 2016, did not result in a change to the maturity date of our loan with Servier. At December 31, 2016, the outstanding principal balance under this loan was$12.6 million using the December 31, 2016 Euro to U.S. Dollar exchange rate of 1.052. In January 2017, we entered into Amendment No. 3 to the Servier LoanAgreement (“Amendment No. 3”). Amendment No. 3 extended the maturity date of the €5.0 million due on January 15, 2017 to July 15, 2017. The other terms ofthe loan remained unchanged.* * *In February 2017, we sold 1,200,000 shares of our common stock and 5,003 shares of Series X convertible preferred stock directly to Biotechnology ValueFund, L.P. and certain of its affiliates (“BVF”) in a registered direct offering, for aggregate net cash proceeds of $24.9 million. BVF purchased the shares ofcommon stock from us at a price of $4.03 per share, the closing stock price on the date of purchase. Each share of Series X convertible preferred stock has a statedvalue of $4,030 per share and is convertible into 1,000 shares of registered common stock based on a conversion price of $4.03 per share of common stock. Thetotal number of shares of common stock issued upon conversion of all issued Series X convertible preferred stock will be 5,003,000 shares. Each share isconvertible at the option of the holder at any time, provided that the holder will be prohibited from converting into common stock if, as a result of such conversion,the holder, together with its affiliates, would beneficially own a number of shares above a conversion blocker, which is initially set at 19.99% of the total commonstock then issued and outstanding immediately following the conversion of such shares. We may use a portion of the proceeds to prepay the remaining balance dueunder the Hercules Term Loan.We have incurred operating losses since inception and have an accumulated deficit of $1.2 billion at December 31, 2016. Management expects operatinglosses and negative cash flows to continue for the foreseeable future. As of December 31, 2016, we had $25.7 million in cash and cash equivalents, which isavailable to fund future operations. Taking into account the net proceeds of $24.9 million from the registered direct offering with BVF in February 2017 andrepayment of our outstanding debt classified within current liabilities on our consolidated balance sheet as of December 31, 2016, without the receipt of additionalfunds from license agreements or additional equity or debt financing, we will not be able to fund our operations and make loan payments as they become due forthe next 12 months following the issuance of our consolidated financial statements. We may not be able to obtain sufficient additional funding by entering into newlicense agreements, issuing additional equity or debt instruments or any other means, and if we are able to do so, they may not be on satisfactory terms. Theanalysis used to determine our ability to continue as a going concern does not include cash sources outside of our direct control that we expect to be available to usin within the next twelve months, such as a $10.0 million milestone expected under one of our existing license agreements.45 Our ability to raise additional capital in the equity and debt markets, should we choose to do so, is dependent on a nu mber of factors, including the marketdemand for our common stock or debt, which itself is subject to a number of pharmaceutical development and business risks and uncertainties, as well as theuncertainty that we would be able to raise such additional cap ital at a price or on terms that are favorable to us. Therefore, we determined there is substantial doubtabout our ability to continue as a going concern within one year from the date that the consolidated financial statements are issued. Our independent registeredpublic accounting firm has included in its auditor’s report on our consolidated financial statements, included in this Annual Report on Form 10-K, a “goingconcern” explanatory paragraph, meaning that we have recurring losses from operations and negative cash flows from operations that raise substantial doubtregarding our ability to continue as a going concern. Consistent with the actions we have taken in the past, we will take steps intended to enable the continuedoperation of the business whi ch may include out-licensing or sale of assets and reducing other expenditures that are within our control. These reductions inexpenditures may have a material adverse impact on our ability to achieve certain of our planned objectives. Even if we are able to source additional funding, wemay be forced to significantly reduce our operations if our business prospects do not improve. If we are unable to source additional funding, we may be forced toshut down operations altogether.Commitments and ContingenciesSchedule of Contractual ObligationsPayments by period due under contractual obligations at December 31, 2016, are as follows (in thousands): Contractual Obligations Total Less than1 year 1 to 3 years 3 to 5 years More than5 years Operating leases (1) $21,633 $3,621 $7,565 $7,041 $3,406 Capital lease (1) 188 116 72 — — Debt obligations (2) Principal and final payment fee 44,235 18,465 11,685 14,085 — Interest 2,868 750 222 1,896 — Total $68,924 $22,952 $19,544 $23,022 $3,406 (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 accompanyingconsolidated financial statements for further discussion of our debt obligation. Refer to Management’s Discussion and Analysis of Financial Condition andResults 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 leasesrequire us to pay taxes, insurance, maintenance and minimum lease payments. In addition to the above, we have committed to make potential future milestonepayments to third parties as part of licensing and development programs. Payments under these agreements become due and payable only upon the achievement byus 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 $7.5 million (assuming one product per contract meets all milestones) have not been recorded on our consolidated balance sheet as of December31, 2016. 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 anysublicense fees to various universities and other research institutions based on future sales or licensing of products that incorporate certain products andtechnologies developed by those institutions. We are unable to determine precisely when and if our payment obligations under the agreements will become due asthese 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 periodspresented. We believe that we are not dependent on materials or other resources that would be significantly impacted by inflation or changing economic conditionsin the foreseeable future.46 Recent Accounting PronouncementsIn May 2014, the Financial Accounting Standards Board (“FASB”) issued guidance codified in Accounting Standards Codification (“ASC”) 606, RevenueRecognition — Revenue from Contracts with Customers , which amends the guidance in ASC 605, Revenue Recognition . The standard’s core principle is that acompany will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the companyexpects 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 forpublic entities such that it is now applicable for annual and interim periods beginning after December 15, 2017. Early adoption is permitted for periods beginningafter December 15, 2016. ASC 606 also permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), orretrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (the modified retrospective method). Weplan to adopt the standard on January 1, 2018. A decision regarding the adoption method has not been finalized at this time. Our final determination will depend ona number of factors such as the significance of the impact of the new standard on our financial results and our ability to accumulate and analyze the informationnecessary to assess the impact on prior period financial statements, as necessary. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) . ASU 2016-2 is aimed at making leasing activities more transparent and comparable,and requires substantially all leases be recognized by lessees on their balance sheet as a right-of-use asset and corresponding lease liability, including leasescurrently accounted for as operating leases. ASU 2016-2 is effective for our interim and annual reporting periods during the year ending December 31, 2019, andall annual and interim reporting periods thereafter. Early adoption is permitted. We are evaluating the impact of the adoption of the standard on our consolidatedfinancial statements.In March 2016, the FASB issued ASU 2016-09, Compensation-Stock Compensation (Topic 718) Improvements to Employee Share-Based PaymentAccounting (“ASU 2016-09”), which is intended to simplify several aspects of the accounting for employee share-based payment transactions, including theincome tax consequences, the determination of forfeiture rates, classification of awards as either equity or liabilities, and classification on the statement of cashflows. This ASU is effective for fiscal years and interim periods within those years beginning after December 15, 2016 and early adoption is permitted. We arecurrently evaluating the impact that the adoption of ASU 2016-09 will have on our consolidated financial statements.Off Balance Sheet ArrangementsWe 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 RiskInterest Rate RiskOur exposure to market rate risk for changes in interest rates relates primarily to our investment portfolio and our loan facilities. By policy, we make ourinvestments 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 theinstrument. We generally hold investments to maturity, with a weighted average portfolio period of less than twelve months. However, if the need arose to liquidatesuch 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 yieldsof 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.The following table presents the amounts and related weighted average interest rates of our cash and cash equivalents at December 31, 2016 and 2015 (inthousands, except interest rate): Maturity CarryingAmount(in thousands) Fair Value(in thousands) WeightedAverageInterest Rate December 31, 2016 Cash and cash equivalents Daily to 90 days $25,742 $25,742 0.23% December 31, 2015 Cash and cash equivalents Daily to 90 days $65,767 $65,767 0.05% 47 As of December 31, 2016, we have an outstanding principal balance on our note with Novartis of $14.1 million, which is due in 2020. The interest rate onthis note is charged at a rate of USD six-month London Interbank Offered Rate (“LIBOR”) plus 2%, which was 3.32% at December 31, 2016. No furtherborrowing is available under this note.As of December 31, 2016, we have an outstanding principal balance on our loan with Servier of €12.0 million, which converts to approximately $12.6million at December 31, 2016. The interest rate on this loan is charged at a floating rate based on EURIBOR and subject to a cap. The interest rate for the initialinterest period was 3.22% and was reset semi-annually ranging from 1.81% to 3.83%. Interest for the six-month period from mid-July 2015 through mid-January2016 was reset to 2.05%. Interest for the six-month period from mid-January 2016 through mid-July 2016 was reset to 1.95%. Interest for the six-month periodfrom mid-July 2016 through mid-January 2017 was reset to 1.81%. Interest is payable semi-annually. No further borrowing is available under this loan.As of December 31, 2016, we have an outstanding principal balance on our loan with Hercules of $17.5 million. The interest rate on this loan is the greaterof 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%. We paid $10.0 million of the currentoutstanding principal balance owed to Hercules in January 2017.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 primerate for the Hercules loan. We estimate a hypothetical 100 basis point change in interest rates could increase or decrease our interest expense by approximately $0.3million on an annualized basis.Foreign Currency RiskWe have debt and incur expenses denominated in foreign currencies. The amount of debt owed or expenses incurred will be impacted by fluctuations inthese foreign currencies. When the U.S. Dollar weakens against foreign currencies, the U.S. Dollar value of the foreign-currency denominated debt, and expenseincreases, and when the U.S. Dollar strengthens against these currencies, the U.S. Dollar value of the foreign-currency denominated debt, and expense decreases.Consequently, changes in exchange rates will affect the amount we are required to repay on our €12.0 million loan from Servier and may affect our results ofoperations. We estimate that a hypothetical 0.01 change in the Euro to USD exchange rate could increase or decrease our unrealized gains or losses byapproximately $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, 2016, the €12.0 million outstanding principal balance under the Servier Loan Agreement equaledapproximately $12.6 million using the December 31, 2016 Euro-to-USD exchange rate of 1.052. In May 2011, in order to manage our foreign currency exposurerelating 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 €15.0million in January 2014 and January 2016, respectively. Upfront premiums paid on these foreign exchange option contracts totaled $1.5 million. As of December31, 2016, both option contracts had expired. Our use of derivative financial instruments represents risk management; we do not enter into derivative financialcontracts for trading purposes. Item 8.Financial Statements and Supplementary DataThe following consolidated financial statements of the registrant, related notes and report of independent registered public accounting firm are set forthbeginning on page F-1 of this report. Report of Independent Registered Public Accounting Firm F-2Consolidated Balance Sheets F-3Consolidated Statements of Comprehensive Loss F-4Consolidated Statements of Stockholders' (Deficit) Equity F-5Consolidated Statements of Cash Flows F-6Notes to the Consolidated Financial Statements F-7 Item 9.Changes in and Disagreements with Accountants on Accounting and Financial DisclosureNot applicable. 48 Item 9A.Control s and ProceduresUnder the supervision and with the participation of our management, including our Chief Executive Officer and our Vice President, Finance, and ChiefFinancial Officer, we conducted an evaluation of our disclosure controls and procedures, as such term is defined under Rule 13a-15 promulgated under theSecurities 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 thatthe 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, summarizedand reported within the time periods specified in the Securities and Exchange Commission’s rules and forms and (ii) accumulated and communicated to ourmanagement, including the Chief Executive Officer and Senior Vice President, Finance and Chief Financial Officer, as the principal executive and financialofficers, respectively, to allow timely decisions regarding required disclosures. Based on this evaluation, our Chief Executive Officer and our Senior VicePresident, Finance and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of the end of the period covered by thisreport.Management’s Report on Internal Control over Financial ReportingManagement, including our Chief Executive Officer and our Senior Vice President, Finance and Chief Financial Officer, is responsible for establishing andmaintaining adequate internal control over financial reporting (as such term is defined in Exchange Act Rules 13a-15(f). The Company’s internal control systemwas designed to provide reasonable assurance to the Company’s management and board of directors regarding the preparation and fair presentation of publishedfinancial 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, 2016. In making this assessment, managementused 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, 2016, our internal control over financial reporting is effective based on thosecriteria.The Company’s internal control over financial reporting as of December 31, 2016, has been audited by Ernst & Young, LLP, independent registered publicaccounting firm who also audited the Company’s consolidated financial statements. Ernst & Young’s report on the Company’s internal control over financialreporting follows.Changes in Internal Control over Financial ReportingThere were no changes in our internal control over financial reporting identified in connection with the evaluation required by paragraph (d) of ExchangeAct 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 internalcontrol over financial reporting. Item 9B.Other InformationNone.49 REPORT OF INDEPENDENT REGISTE RED PUBLIC ACCOUNTING FIRMThe Board of Directors and Stockholders of XOMA CorporationWe have audited XOMA Corporation’s internal control over financial reporting as of December 31, 2016, based on criteria established in Internal Control –Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). XOMACorporation’s management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internalcontrol over financial reporting included in the accompanying Management’s Report on Internal Control Over Financial Reporting. Our responsibility is to expressan 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 thatwe plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all materialrespects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing andevaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessaryin 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 reportingand the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control overfinancial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect thetransactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation offinancial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only inaccordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection ofunauthorized 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 ofeffectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance withthe 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, 2016, basedon the COSO criteria.We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheetsof XOMA Corporation as December 31, 2016 and 2015, and the related consolidated statements of comprehensive loss, stockholders’ (deficit) equity, and cashflows for each of the three years in the period ended December 31, 2016 of XOMA Corporation and our report dated March 16, 2017 expressed an unqualifiedopinion thereon that included an explanatory paragraph regarding XOMA Corporation’s ability to continue as a going concern. /s/ Ernst & Young LLPRedwood City, CaliforniaMarch 16, 2017 50 PART III Item 10.Directors, Executive Officers, Corporate GovernanceCertain 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 (underInstruction 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 2017 AnnualGeneral Meeting of Stockholders (“2017 Proxy Statement”), under the sections labeled “Item 1—Election of Directors” and “Compliance with Section 16(a) of theSecurities Exchange Act of 1934” , and is incorporated by reference. The 2017 Proxy Statement will be filed with the SEC within 120 days after the end of thefiscal year to which this report relates.Code of EthicsThe Company’s Code of Ethics applies to all employees, officers and directors including the Chief Executive Officer (principal executive officer) and theVice President, Finance and Chief Financial Officer (principal financial and principal accounting officer) and is posted on the Company’s website atwww.xoma.com. We intend to satisfy the applicable disclosure requirements regarding amendments to, or waivers from, provisions of our Code of Ethics byposting such information on our website. Item 11.Executive CompensationInformation required by this Item will be included in the sections labeled “Compensation of Executive Officers”, “Summary Compensation Table”, “Grantsof Plan-Based Awards”, “Outstanding Equity Awards as of December 31, 2016”, “Option Exercises and Shares Vested”, “Pension Benefits”, “Non-QualifiedDeferred Compensation” and “Compensation of Directors” appearing in our 2017 Proxy Statement, and is incorporated by reference. Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder MattersInformation required by this Item will be included in the sections labeled “Common Stock of Certain Beneficial Owners and Management” and “EquityCompensation Plan Information” appearing in our 2017 Proxy Statement, and is incorporated by reference. Item 13.Certain Relationships and Related Transactions, and Director IndependenceInformation required by this Item will be included in the section labeled “Transactions with Related Persons” appearing in our 2017 Proxy Statement, andis incorporated by reference. Item 14.Principal Accountant Fees and ServicesInformation required by this Item will be included in the section labeled “Appointment of Independent Registered Public Accounting Firm” appearing in our2017 Proxy Statement, and is incorporated by reference. 51 PART IVItem 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 orthe 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.Item 16 .Form 10-K SummaryNone. 52 S IGNAT URESPursuant 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 itsbehalf by the undersigned, thereunto duly authorized, on this 16 th day of March 2017. XOMA Corporation By: /s/ JAMES R. NEAL James R. NealChief Executive Officer and DirectorPOWER OF ATTORNEYKNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints James Neal 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 otherdocuments 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 performeach 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 ratifyingand 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 registrantand in the capacities and on the dates indicated. Signature Title Date /s/ James R. Neal Chief Executive Officer (Principal Executive Officer) and Director March 16, 2017(James R. Neal) /s/ Thomas Burns Senior Vice President, Finance and Chief Financial Officer (Principal Financialand Principal Accounting Officer) March 16, 2017(Thomas Burns) /s/ W. Denman Van Ness Chairman of the Board of Directors March 16, 2017(W. Denman Van Ness) /s/ John W. Varian Director March 16, 2017(John W. Varian) /s/ Peter Barton Hutt Director March 16, 2017(Peter Barton Hutt) Director March 16, 2017(Joseph M. Limber) /s/ Timothy P. Walbert Director March 16, 2017(Timothy P. Walbert) /s/ Jack L. Wyszomierski Director March 16, 2017(Jack L. Wyszomierski) /s/ Matthew Perry Director March 16, 2017(Matthew Perry) 53 Index to Consolidated Financial Statements Report of Independent Registered Public Accounting Firm F-2Consolidated Balance Sheets F-3Consolidated Statements of Comprehensive Loss F-4Consolidated Statements of Stockholders' (Deficit) Equity F-5Consolidated Statements of Cash Flows F-6Notes to the Consolidated Financial Statements F-7 F-1 REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRMThe Board of Directors and Stockholders of XOMA CorporationWe have audited the accompanying consolidated balance sheets of XOMA Corporation as of December 31, 2016 and 2015, and the related consolidatedstatements of comprehensive loss, stockholders’ (deficit) equity and cash flows for each of the three years in the period ended December 31, 2016. These financialstatements 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 thatwe plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includesexamining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principlesused and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide areasonable 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 atDecember 31, 2016 and 2015, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 31, 2016, inconformity with U.S. generally accepted accounting principles.The accompanying consolidated financial statements have been prepared assuming that the Company will continue as a going concern. As discussed in Note1 to the financial statements, the Company’s recurring losses from operations and its need for additional capital raise substantial doubt about its ability to continueas a going concern. Management's plans in regard to these matters are also described in Note 1. The financial statements do not include any adjustments to reflectthe possible future effects on the recoverability and classification of assets or the amounts and classification of liabilities that may result from the outcome of thisuncertainty.We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), XOMA Corporation’s internalcontrol over financial reporting as of December 31, 2016, based on criteria established in Internal Control – Integrated Framework issued by the Committee ofSponsoring Organizations of the Treadway Commission (2013 framework) and our report dated March 16, 2017 expressed an unqualified opinion thereon. /s/ Ernst & Young LLPRedwood City, CaliforniaMarch 16, 2017 F-2 XOMA CorporationCONSOLIDATED BALANCE SHEETS(in thousands, except share data) December 31, 2016 2015 ASSETS Current assets: Cash and cash equivalents $25,742 $65,767 Marketable securities — 496 Trade and other receivables, net 566 4,069 Prepaid expenses and other current assets 852 1,887 Total current assets 27,160 72,219 Property and equipment, net 1,036 1,997 Other assets 481 664 Total assets $28,677 $74,880 LIABILITIES AND STOCKHOLDERS’ DEFICIT Current liabilities: Accounts payable $5,689 $6,831 Accrued and other liabilities 4,215 6,566 Accrued restructuring costs 3,594 459 Deferred revenue – current 899 3,198 Interest bearing obligations – current 17,855 5,910 Accrued interest on interest bearing obligations – current 254 331 Total current liabilities 32,506 23,295 Deferred revenue – non-current 18,000 — Interest bearing obligations – non-current 25,312 42,757 Contingent warrant liabilities — 10,464 Other liabilities – non-current 69 673 Total liabilities 75,887 77,189 Commitments and Contingencies (Note 13) Stockholders’ deficit: Preferred stock, $0.05 par value, 1,000,000 shares authorized, 0 issued and outstanding at December 31, 2016 and 2015 — — Common stock, $0.0075 par value, 277,333,332 shares authorized, 6,114,145 and 5,952,278 shares issued and outstanding at December 31, 2016 and 2015, respectively 46 45 Additional paid-in capital 1,146,357 1,137,729 Accumulated deficit (1,193,613) (1,140,083)Total stockholders’ deficit (47,210) (2,309)Total liabilities and stockholders’ deficit $28,677 $74,880 The accompanying notes are an integral part of these consolidated financial statements. F-3 XOMA CorporationCONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS(in thousands, except per share amounts) Year Ended December 31, 2016 2015 2014 Revenues: License and collaborative fees $3,296 $49,064 $5,683 Contract and other 2,268 6,383 13,183 Total revenues 5,564 55,447 18,866 Operating expenses: Research and development 44,234 70,852 80,748 Selling, general and administrative 18,322 20,620 19,866 Restructuring 4,566 3,699 84 Total operating expenses 67,122 95,171 100,698 Loss from operations (61,558) (39,724) (81,832) Other income (expense): Interest expense (3,946) (4,194) (4,303)Other income, net 1,510 5,500 2,061 Revaluation of contingent warrant liabilities 10,464 17,812 45,773 Net loss $(53,530) $(20,606) $(38,301) Basic net loss per share of common stock $(8.89) $(3.50) $(7.13)Diluted net loss per share of common stock $(8.89) $(3.50) $(13.49)Shares used in computing basic net loss per share of common stock 6,021 5,890 5,372 Shares used in computing diluted net loss per share of common stock 6,021 5,890 5,767 Other comprehensive loss: Net loss $(53,530) $(20,606) $(38,301)Net unrealized gain on available-for-sale securities — — 1 Comprehensive loss $(53,530) $(20,606) $(38,300) The accompanying notes are an integral part of these consolidated financial statements. F-4 XOMA CorporationCONSOLIDATED STATEMENTS OF STOCKHOLDERS’ (DEFICIT) EQUITY(in thousands) Common Stock AdditionalPaid-In AccumulatedComprehensive Accumulated TotalStockholders' Shares Amount Capital Income Deficit (Deficit) Equity Balance, December 31, 2013 5,269 $40 $1,077,150 $(1) $(1,081,176) $(3,987)Exercise of stock options, contributions to 401(k) and incentive plans 54 1 4,525 — — 4,526 Vesting of restricted stock units 49 — — — — — Stock-based compensation expense — — 10,772 — — 10,772 Sale of shares of common stock 405 3 37,783 — — 37,786 Issuance of warrants — — (10,258) — — (10,258)Exercise of warrants 18 — 2,560 — — 2,560 Net loss — — — — (38,301) (38,301)Other comprehensive income — — — 1 — 1 Balance, December 31, 2014 5,795 44 1,122,532 — (1,119,477) 3,099 Exercise of stock options, contributions to 401(k) and incentive plans 27 — 1,467 — — 1,467 Vesting of restricted stock units 60 — — — — — Stock-based compensation expense — — 9,727 — — 9,727 Issuance of warrants — — 450 — — 450 Exercise of warrants 70 1 3,553 — — 3,554 Net loss — — — — (20,606) (20,606)Balance, December 31, 2015 5,952 45 1,137,729 — (1,140,083) (2,309)Contributions to 401(k) and incentive plans 36 — 844 — — 844 Vesting of restricted stock units 113 1 (1) — — — Stock-based compensation expense — — 7,645 — — 7,645 Issuance of warrants — — 97 — — 97 Issuance of common stock 13 — 43 — — 43 Net loss — — — — (53,530) (53,530)Balance, December 31, 2016 6,114 $46 $1,146,357 $— $(1,193,613) $(47,210) The accompanying notes are an integral part of these consolidated financial statements.F-5 XOMA CorporationCONSOLIDATED STATEMENTS OF CASH FLOWS(in thousands) Year Ended December 31, 2016 2015 2014 Cash flows used in operating activities: Net loss $(53,530) $(20,606) $(38,301)Adjustments to reconcile net loss to net cash used in operating activities: Depreciation and amortization 769 1,532 1,856 Common stock contribution to 401(k) 785 986 870 Stock-based compensation expense 7,645 9,727 10,772 Revaluation of contingent warrant liabilities (10,464) (17,812) (45,773)Amortization of debt issuance costs, debt discount and final payment fee on debt 1,451 1,413 2,707 Gain on sale of business in connection with Agenus asset purchase agreement — (3,505) — Loss on loan extinguishment — 429 — Gain on sale of marketable securities (126) — — Unrealized gain on foreign currency exchange (489) (1,870) (2,280)Impairment of long-lived assets and non-marketable cost method investment 370 — — Other 112 (12) 346 Changes in assets and liabilities: Trade and other receivables, net 3,532 (761) 472 Prepaid expenses and other current assets 1,034 (28) (662)Accounts payable and accrued liabilities (3,938) (2,080) (3,753)Accrued restructuring 3,135 459 (21)Accrued interest on interest bearing obligations 331 380 (1,444)Deferred revenue 15,694 356 (2,983)Other liabilities — 500 (88)Net cash used in operating activities (33,689) (30,892) (78,282) Cash flows from investing activities: Proceeds from sale of marketable securities 622 — — Proceeds from maturities of investments — — 20,000 Purchases of property and equipment (59) (430) (325)Proceeds from sale of business in connection with Agenus asset purchase agreement — 4,862 — Proceeds from sale of property and equipment 49 18 — Net cash provided by investing activities 612 4,450 19,675 Cash flows from financing activities: Proceeds from issuance of common stock, net of issuance costs 57 481 41,442 Proceeds from exercise of warrants — 1 35 Proceeds from issuance of long term debt — 20,000 — Debt issuance costs and loan fees — (512) — Principal payments – debt (6,890) (6,128) (5,917)Principal payments – capital lease (109) (41) — Net cash (used in) provided by financing activities (6,942) 13,801 35,560 Effect of exchange rate on cash (6) (37) (167) Net decrease in cash and cash equivalents (40,025) (12,678) (23,214)Cash and cash equivalents at the beginning of the year 65,767 78,445 101,659 Cash and cash equivalents at the end of the year $25,742 $65,767 $78,445 Supplemental Cash Flow Information: Cash paid for interest $2,142 $1,927 $3,009 Non-cash investing and financing activities: Marketable securities received in conjunction with the disposal of business $— $496 $— Equipment acquired through capital lease $— $323 $— Reclassification of contingent warrant liability to equity upon exercise of warrants $— $(3,552) $(2,526)Issuance of warrants $— $450 $10,258 Interest added to principal balances on long-term debt $402 $327 $313 The accompanying notes are an integral part of these consolidated financial statements. F-6 XOMA CorporationNOTES TO CONSOLIDATED FINANCIAL STATEMENTS 1. Description of BusinessXOMA Corporation (referred to as “XOMA” or the “Company”), a Delaware corporation, has a long history of discovering and developing innovativetherapeutics derived from our unique platform of antibody technologies. The Company has typically sought to license these therapeutic assets to licensees who takeon the responsibilities of later stage development, approval and commercialization. In addition, XOMA has licensed antibody technologies on a non-exclusive basisto other companies who desire to access this platform for their own discovery efforts. As XOMA’s business model is based on the goal of out-licensing to otherpharmaceutical companies for them to commercialize and market any resultant products, the Company expects that a significant portion of its future revenue willbe based on payments it may receive from its licensees.XOMA’s asset base includes antibodies with unique properties including several that interact at allosteric sites on a specific protein rather than theorthosteric, or active, sites. These compounds are designed to either enhance or diminish the target protein’s activity as desired.Going ConcernThe Company has incurred operating losses since its inception resulting in an accumulated deficit of $1.2 billion, has a working capital deficiency of $5.3million and $43.2 million in total outstanding debt at December 31, 2016. Management expects operating losses and negative cash flows to continue for theforeseeable future and, as a result, the Company will require additional capital to fund its operations and execute its business plan. As of December 31, 2016, theCompany had $25.7 million in cash and cash equivalents, which is available to fund future operations. In February 2017, the Company received net proceeds of$24.9 million from a registered direct offering. Taking into account the net proceeds of $24.9 million from the registered direct offering in February 2017, therepayment of its outstanding debt classified within current liabilities on the Company’s consolidated balance sheet as of December 31, 2016, and without thereceipt of additional funds from license and collaboration agreements or additional equity or debt financing, it will be unable to fund its operations and makescheduled loan payments beyond February 2018. Therefore, the Company determined there is substantial doubt about its ability to continue as a going concernwithin one year after the date the consolidated financial statements are issued. The analysis used to determine the Company’s ability to continue as a going concerndoes not include cash sources outside of XOMA’s direct control that management expects to be available within the next twelve months. The Company may not be able to obtain sufficient additional funding through monetizing certain of its existing assets, entering into new license andcollaboration agreements, issuing additional equity or debt instruments or any other means, and if it is able to do so, they may not be on satisfactory terms. TheCompany’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 anduncertainties, 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.Consistent with the actions the Company has taken in the past, including the restructuring in December 2016, it will take steps intended to enable the continuedoperation of the business which may include out-licensing or sale of assets and reducing other expenditures that are within the Company’s control. Thesereductions in expenditures may have a material adverse impact on the Company’s ability to achieve certain of its planned objectives. Even if the Company is ableto source additional funding, it may be forced to significantly reduce its operations if its business prospects do not improve. If the Company is unable to sourceadditional funding, it may be forced to shut down operations altogether. These consolidated financial statements have been prepared on a going concern basis anddo not include any adjustments to the amounts and classification of assets and liabilities that may be necessary in the event the Company can no longer continue asa going concern.Reverse Stock SplitIn October 2016, the Company’s stockholders voted at a special meeting of stock holders to approve a series of alternate amendments to the Company’sAmended Certificate of Incorporation to effect a reverse stock split of the Company’s issued and outstanding common stock. The Company’s Board of Directorsthen approved a specific reverse split ratio of 1-for-20. The par value per share of the Company’s common stock and preferred stock remained at $0.0075 and$0.05, respectively. The consolidated financial statements have been retroactively adjusted to reflect the reverse stock split for all periods presented. F-7 2. Basis of Presentation and Significant Accounting PoliciesPrinciples of ConsolidationThe consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactionsamong consolidated entities were eliminated upon consolidation.Use of EstimatesThe preparation of financial statements in conformity with generally accepted accounting principles in the United States requires management to makeestimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosures. On an ongoing basis, managementevaluates its estimates including, but not limited to, those related to contingent warrant liabilities, revenue recognition, debt amendments, research and developmentexpense, long-lived assets, restructuring liabilities, legal contingencies, derivative instruments and stock-based compensation. The Company bases its estimates onhistorical experience and on various other market-specific and other relevant assumptions that are believed to be reasonable under the circumstances, the results ofwhich form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results maydiffer significantly from these estimates, such as the Company’s billing under government contracts and the Company’s accrual for clinical trial expenses. Underthe Company’s contracts with the National Institute of Allergy and Infectious Diseases (“NIAID”), a part of the National Institutes of Health (“NIH”), theCompany 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 anadjustment to revenue previously reported which potentially could be significant. In March 2016, the Company effected the novation of its remaining activecontract with NIAID to Nanotherapeutics, Inc. (“Nanotherapeutics”) (see Note 6). The billings made prior to the effective date of the novation of such contract arestill subject to future audits, which may result in significant adjustments to reported revenues. The Company’s accrual for clinical trials is based on estimates of theservices received and efforts expended under contracts with clinical trial centers and clinical research organizations.Revenue RecognitionRevenue is recognized when the four basic criteria of revenue recognition are met: (1) persuasive evidence of an arrangement exists; (2) delivery hasoccurred or services have been rendered; (3) the fee is fixed or determinable; and (4) collectability is reasonably assured. The determination of criteria (2) is basedon management’s judgments regarding whether a continuing performance obligation exists. The determination of criteria (3) and (4) are based on management’sjudgments regarding the nature of the fee charged for products or services delivered and the collectability of those fees. Allowances are established for estimateduncollectible amounts, if any.The Company recognizes revenue from its license and collaboration arrangements, contract services, and royalties. Revenue arrangements with multipleelements are divided into separate units of accounting if certain criteria are met, including whether the delivered element has stand-alone value to the customer andwhether there is objective and reliable evidence of the fair value of the undelivered items. Each deliverable in the arrangement is evaluated to determine whether itmeets 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 ofaccounting. Analyzing the arrangement to identify deliverables requires the use of judgment, and each deliverable may be an obligation to deliver services, a rightor license to use an asset, or another performance obligation. The consideration received is allocated among the separate units of accounting based on theirrespective fair values and the applicable revenue recognition criteria are applied to each of the separate units. Advance payments received in excess of amountsearned are classified as deferred revenue until earned.License and Collaborative FeesRevenue from non-refundable license, technology access or other payments under license and collaborative agreements where the Company has acontinuing obligation to perform is recognized as revenue over the estimated period of the continuing performance obligation. The Company estimates theperformance period at the inception of the arrangement and reevaluates it each reporting period. Management makes its best estimate of the period over which itexpects to fulfill the performance obligations, which may include clinical development activities. Given the uncertainties of research and developmentcollaborations, significant judgment is required to determine the duration of the performance period. This reevaluation may shorten or lengthen the period overwhich the remaining revenue is recognized. Changes to these estimates are recorded on a prospective basis.F-8 License and collaboration agreements with certain third parties also provide for contingent payments to be paid to the Company based solely upon theperformance of the partner. For such contingent payments revenue is recognized upon completion of the milestone event, once confirmation is received from thethird party, provided that collection is reasonably assured and the other revenue recognition criteria have been satisfied. Milestone payments that are not substantiveor that require a continu ing 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.Payment related to an option to purchase the Company’s commercialization rights is considered substantive if, at the inception of the arrangement, theCompany 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 issubstantive include the overall objective of the arrangement, the benefit the collaborator might obtain from the arrangement without exercising the option, the costto exercise the option and the likelihood that the option will be exercised. For arrangements under which an option is considered substantive, the Company does notconsider the item underlying the option to be a deliverable at the inception of the arrangement and the associated option fees are not included in allocablearrangement consideration, assuming the option is not priced at a significant and incremental discount. Conversely, for arrangements under which an option is notconsidered substantive or if an option is priced at a significant and incremental discount, the Company would consider the item underlying the option to be adeliverable at the inception of the arrangement and a corresponding amount would be included in allocable arrangement consideration.Contract and Other RevenuesContract revenue for research and development involves the Company providing research and development services to collaborative parties or others. Costreimbursement revenue under collaborative agreements is recorded as contract and other revenues and is recognized as the related research and development costsare 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 ineach accounting period are based on management’s estimates of the proportional performance during the period. Adjustments to estimates based on actualperformance 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 hada $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, significantjudgment 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 collectability is reasonably assured.The royalty revenue and receivables recorded in these instances are based upon communication with the Company’s licensees, historical information and forecastedsales trends.Sale of Future Revenue Streams The Company has sold its rights to receive certain milestones and royalties on product sales. In the circumstance where the Company has sold its rights tofuture milestones and royalties under a license agreement and also maintains limited continuing involvement in the arrangement (but not significant continuinginvolvement in the generation of the cash flows that are due to the purchaser), the Company defers recognition of the proceeds it receives for the milestone orroyalty stream and recognizes such deferred revenue as contract and other revenue over the life of the underlying license agreement. The Company recognizes thisrevenue under the "units-of-revenue" method. Under this method, amortization for a reporting period is calculated by computing a ratio of the proceeds receivedfrom the purchaser to the total payments expected to be made to the purchaser over the term of the agreement, and then applying that ratio to the period’s cashpayment.Estimating the total payments expected to be received by the purchaser over the term of such arrangements requires management to use subjective estimatesand assumptions. Changes to the Company’s estimate of the payments expected to be made to the purchaser over the term of such arrangements could have amaterial effect on the amount of revenues recognized in any particular period.F-9 Research and Development ExpensesThe Company expenses research and development costs as incurred. Research and development expenses consist of direct costs such as salaries and relatedpersonnel costs, and material and supply costs, and research-related allocated overhead costs, such as facilities costs. In addition, research and developmentexpenses include costs related to clinical trials. From time to time, research and development expenses may include up-front fees and milestones paid tocollaborative 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 under contracts with clinical trial centers andclinical research organizations. The Company may terminate these contracts upon written notice and is generally only liable for actual effort expended by theorganizations to the date of termination, although in certain instances the Company may be further responsible for termination fees and penalties. The Companymakes 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 resultingfrom clinical trials are recorded when incurred based in part on estimates as to the status of the various trials.Stock-Based CompensationThe Company recognizes compensation expense for all stock-based payment awards made to the Company’s employees, consultants and directors that areexpected 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 PricingModel (the “Black-Scholes Model”). The Black-Scholes Model requires inputs such as the expected term of the option, expected volatility and risk-free interestrate. To establish an estimate of expected term, the Company considers the vesting period and contractual period of the award and its historical experience of stockoption exercises, post-vesting cancellations and volatility. The estimate of expected volatility is based on the Company’s historical volatility. The risk-free rate isbased on the yield available on United States Treasury zero-coupon issues corresponding to the expected term of the award.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. F orfeitures are estimatedat the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from estimates.Restructuring and Impairment ChargesRestructuring costs are primarily comprised of severance costs related to workforce reductions, contract termination costs and asset impairments. TheCompany recognizes restructuring charges when the liability has been incurred, except for employee termination benefits that are incurred over time. Generally,employee termination benefits (i.e., severance costs) are accrued at the date management has committed to a plan of termination and employees have been notifiedof their termination dates and expected severance payments. Key assumptions in determining the restructuring costs include the terms and payments that may benegotiated to terminate certain contractual obligations and the timing of employees leaving the Company. Other costs, including contract termination costs, arerecorded when the arrangement is terminated. Asset impairment charges have been, and will be, recognized when management has concluded that the assets havebeen impaired.Cash, Cash Equivalents and Marketable SecuritiesThe Company considers all highly liquid debt instruments with maturities of three months or less at the time the Company acquires them and that can beliquidated 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 declinesin value judged to be other-than-temporary on available-for-sale securities are included in other income (expense), net. The Company reviews its instruments forother-than-temporary impairment whenever the value of the instrument is less than the amortized cost. The cost of investments sold is based on the specificidentification method. Interest and dividends on securities classified as available-for-sale are included in other income (expense), net.F-10 Property and Equipment and Long-Lived AssetsProperty and equipment is stated at cost less depreciation. Equipment depreciation is calculated using the straight-line method over the estimated usefullives of the assets (three to seven years). Leasehold improvements, buildings and building improvements are depreciated using the straight-line method over theshorter of the lease terms or the useful lives (one to fifteen years). Amortization expense for assets acquired through capital leases is included in depreciationexpense in the consolidated statements of comprehensive loss. Upon the sale or retirement of assets, the cost and related accumulated depreciation and amortizationare 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 ofcomprehensive 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 incircumstances indicate that the asset may not be recoverable. An impairment loss would be recognized when estimated future cash flows expected to result from theuse of the asset and its eventual disposition is less than its carrying amount. During the year ended December 31, 2016, the Company recognized an impairmentcharge of $0.2 million (see Note 3). During the years ended December 31, 2015, and 2014, there were no material impairment losses recognized. WarrantsThe Company has issued warrants to purchase shares of its common stock in connection with financing activities. The Company accounts for some of thesewarrants 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. TheBlack-Scholes Model requires inputs such as the expected term of the warrants, expected volatility and risk-free interest rate. These inputs are subjective andrequire 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 the Company’sunderlying stock. The assumptions associated with contingent warrant liabilities are reviewed each reporting period and changes in the estimated fair value of thesecontingent warrant liabilities are recognized in revaluation of contingent warrant liabilities within the consolidated statements of comprehensive loss.Income TaxesThe Company accounts for income taxes using the liability method under which deferred tax assets and liabilities are determined based on differencesbetween 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 differencesare expected to reverse. Valuation allowances are established when necessary to reduce deferred tax assets to the amount which is more likely than not to berealizable.The recognition, derecognition and measurement of a tax position is based on management’s best judgment given the facts, circumstances and informationavailable at each reporting date. The Company’s policy is to recognize interest and penalties related to the underpayment of income taxes as a component ofincome 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 StockBasic net loss per share of common stock is based on the weighted average number of shares of common stock outstanding during the period. Diluted netloss per share of common stock is based on the weighted average number of shares outstanding during the period, adjusted to include the assumed conversion ofcertain stock options, RSUs, and warrants for common stock. The calculation of diluted loss per share of common stock requires that, to the extent the averagemarket 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 toearnings (loss) per share of common stock for the period, adjustments to net loss used in the calculation are required to remove the change in fair value of thewarrants for the period. Likewise, adjustments to the denominator are required to reflect the related dilutive shares. F-11 Recent Accounting PronouncementsIn May 2014, the Financial Accounting Standards Board (“FASB”) issued guidance codified in Accounting Standards Codification (“ASC”) 606, RevenueRecognition — Revenue from Contracts with Customers , which amends the guidance in ASC 605, Revenue Recognition . The standard’s core principle is that acompany will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the companyexpects 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 forpublic entities such that it is now applicable for annual and interim periods beginning after December 15, 2017. Early adoption is permitted for periods beginningafter December 15, 2016. ASC 606 also permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), orretrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (the modified retrospective method). TheCompany currently plans to adopt the standard on January 1, 2018. A decision regarding the adoption method has not been finalized at this time. The Company’sfinal determination will depend on a number of factors such as the significance of the impact of the new standard on the Company’s financial results and theCompany’s ability to accumulate and analyze the information necessary to assess the impact on prior period financial statements, as necessary.In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) . ASU 2016-2 is aimed at making leasing activities more transparent and comparable,and requires substantially all leases be recognized by lessees on their balance sheet as a right-of-use asset and corresponding lease liability, including leasescurrently accounted for as operating leases. ASU 2016-2 is effective for the Company’s interim and annual reporting periods during the year ending December 31,2019, and all annual and interim reporting periods thereafter. Early adoption is permitted. The Company is evaluating the impact of the adoption of the standard onits consolidated financial statements.In March 2016, the FASB issued ASU 2016-09, Compensation-Stock Compensation (Topic 718) Improvements to Employee Share-Based PaymentAccounting (“ASU 2016-09”), which is intended to simplify several aspects of the accounting for employee share-based payment transactions, including theincome tax consequences, the determination of forfeiture rates, classification of awards as either equity or liabilities, and classification on the statement of cashflows. This ASU is effective for fiscal years and interim periods within those years beginning after December 15, 2016 and early adoption is permitted. TheCompany is currently evaluating the impact that the adoption of ASU 2016-09 will have on its consolidated financial statements and related disclosures. 3. Consolidated Financial Statement DetailCash and Cash EquivalentsAt December 31, 2016, cash and cash equivalents consisted of demand deposits of $21.5 million and money market funds of $4.2 million with maturities ofless than 90 days at the date of purchase. At December 31, 2015, cash and cash equivalents consisted of demand deposits of $23.2 million and money market fundsof $42.6 million with maturities of less than 90 days at the date of purchase.Marketable SecuritiesAt December 31, 2015, marketable securities of $0.5 million consisted of an investment in the common stock of a public entity. In August 2016, theCompany sold its marketable securities and recognized a gain of $0.1 million in the Company’s consolidated statement of comprehensive loss. Accordingly, as ofDecember 31, 2016, the Company did not hold any marketable securities.Foreign Exchange OptionsThe Company holds debt and may incur revenue and expenses denominated in foreign currencies, which exposes it to market risk associated with foreigncurrency 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 inEuros on its €15.0 million loan from Les Laboratories Servier (“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 was reduced if the U.S. dollar weakens against the Euro.However, if the U.S. dollar strengthens against the Euro, the Company was not required to exercise these options, but would not receive any refund on premiumspaid.F-12 Upfront premiums paid on these foreign exchange option contracts totaled $1.5 million. The fair values of these option contracts were revalued at eachreporting period and were estimated based on pricing models using readily observable inputs from actively quoted markets. The fair values of these optioncontracts were included in other assets on the consolidated balance sheet and changes in fair value on these contracts were included in other income (expense), neton the consolidated statements of comprehensive loss.As of December 31, 2016, the Company has no foreign exchange option contracts outstanding. The Company recognized losses of zero, $6,000 and $0.4million, related to the revaluation of these options for the years ended December 31, 2016, 2015, and 2014, respectively.Trade and Other Receivables, netTrade receivables are stated at their net realizable value. Specific allowances are recorded for doubtful accounts or based on other available information. TheCompany reviews their exposure to accounts receivable, including the requirement for allowances based on management’s judgment. The Company has nothistorically experienced any significant losses. As of December 31, 2016 and 2015, the allowance for doubtful accounts amounted to $13,000 and $0.2 million,respectively.Trade and other receivables consisted of the following (in thousands): December 31, 2016 2015 Trade receivables, net $474 $3,718 Other receivables 92 351 Total $566 $4,069 Property and Equipment, netProperty and equipment, net consisted of the following (in thousands): December 31, 2016 2015 Equipment and furniture $14,023 $14,431 Leasehold improvements 554 2,776 Construction-in-progress — 243 14,577 17,450 Less: Accumulated depreciation and amortization (13,541) (15,453)Property and equipment, net $1,036 $1,997 As of December 31, 2016, property and equipment held under capital leases, included under equipment and furniture above, amounted to $0.3 million, withaccumulated amortization of $0.1 million. As of December 31, 2015, property and equipment held under capital leases, included under construction-in-progressabove, amounted to $0.2 million, with accumulated amortization of zero. Depreciation and amortization expense was $0.8 million, $1.5 million, and $1.9 millionfor the years ended December 31, 2016, 2015, and 2014, respectively. In December 2015, the Company completed the sale of its land, building and certainequipment used for its manufacturing operations (see Note 6). The related cost and accumulated depreciation and amortization amounts of $15.9 million and $13.7million, 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 theCompany’s consolidated statement of comprehensive loss.In connection with the restructuring implemented in December 2016, the Company determined that the leasehold improvements located in one of its leasedfacilities are no longer expected to be used by the Company. The Company determined that an impairment charge equal to the net book value of the leaseholdimprovements of $0.2 million should be recorded as the economic value, if any, that may be realized from the leasehold improvements would be negligible in asublease transaction. The impairment charge is reflected within the restructuring charge in the consolidated statement of comprehensive loss for the year endedDecember 31, 2016. There were no impairment charges recognized during the years ended December 31, 2015 and 2014.F-13 Accrued and Other LiabilitiesAccrued and other liabilities consisted of the following (in thousands): December 31, 2016 2015 Accrued payroll and other benefits $1,582 $2,156 Accrued legal and accounting fees 385 517 Accrued clinical trial costs 743 406 Accrued incentive compensation — 2,609 Other 1,505 878 Total $4,215 $6,566 4. Collaborative, Licensing and Other ArrangementsCollaborative and Other AgreementsNovartisIn November 2008, the Company restructured its product development collaboration with Novartis AG (“Novartis”) entered into in 2004 for thedevelopment and commercialization of antibody products for the treatment of cancer. Under the restructured agreement, the Company could, in the future, receivepotential 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 CD40and 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 X213. The Company’s right toroyalty-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 isproduced from a cell line provided to Novartis by the Company. In 2016, 2015, and 2014, no revenue was recognized under the collaboration agreement withNovartis.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 (seeNote 8).On September 30, 2015 (the “Effective Date”), the Company and Novartis International entered into a license agreement (the “License Agreement”) underwhich the Company granted Novartis International an exclusive, world-wide, royalty-bearing license to the Company’s anti-transforming growth factor beta(TGFβ) antibody program (the “anti-TGFβ Program”). Under the terms of the License Agreement, Novartis International has worldwide rights to the anti-TGFβProgram and is responsible for the development and commercialization of antibodies and products containing antibodies arising from the anti-TGFβ 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-TGFβProgram to Novartis International. The transfer of certain proprietary know-how, materials and inventory relating to the anti-TGFβ Program to NovartisInternational 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 indevelopment, regulatory and commercial milestones. Any such payments will be treated as contingent consideration and recognized as revenue when they areachieved, as the Company has no performance obligations under the License Agreement beyond the initial 90-day period. No milestone payments have beenreceived as of December 31, 2016. The Company is also eligible to receive royalties on sales of licensed products, which are tiered based on sales levels and rangefrom 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 particularproduct 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 thedate 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 toterminate the License Agreement on an antibody-by-antibody and country-by-country basis or in its entirety on one hundred eighty days’ notice.F-14 The Company identified the follo wing performance deliverables under the License Agreement: (i) the license, (ii) regulatory services to be delivered within90 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 Companyconsidered the provisions of the multiple-element arrangement guidance in determining how to recognize the revenue associated with these deliverables. TheCompany determined that none of the deliverables have standalone value an d therefore has accounted for them as a single unit of account. The Companyrecognized the entire upfront payment as revenue in the consolidated statement of comprehensive loss in 2015 as it had completed its performance obligations as ofDecember 31, 2015 .In connection with the execution of the License Agreement, XOMA and Novartis Vaccines Diagnostics, Inc. (“NVDI”) executed an amendment to theirAmended 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 thatXOMA 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 tenyears 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, 2015to September 30, 2020 (see Note 8). All other terms of the Amended and Restated Research, Development and Commercialization Agreement remainedunchanged. ServierIn December 2010, the Company entered into a license and collaboration agreement (“Collaboration Agreement”) with Servier, to jointly develop andcommercialize gevokizumab in multiple indications, which provided for a non-refundable upfront payment of $15.0 million that was received by the Company inJanuary 2011. 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 atthe date of funding (see Note 8). Under the terms of the Collaboration Agreement, Servier had worldwide rights to cardiovascular disease and diabetes indicationsand had rights outside the United States and Japan to all other indications, including non-infectious intermediate, posterior or pan-uveitis, Behçet’s disease uveitis,pyoderma gangrenosum, and other inflammatory and oncology indications. XOMA retained development and commercialization rights in the United States andJapan 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 gevokizumabin 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 threepivotal clinical trials were shared equally between Servier and the Company. For the years ended December 31, 2016, 2015, and 2014, the Company recordedrevenue of $0.6 million, $1.2 million and $3.5 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 CollaborationAgreement (“Collaboration Amendment”). Under the Collaboration Agreement, the Company was eligible to receive up to approximately €356.5 million in theaggregate in milestone payments if the Company re-acquired cardiovascular and/or diabetes rights for use in the United States, and approximately €633.8 million inaggregate 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 Statesand approximately €618.8 million if the Company did not re-acquire those rights. The milestone reductions were related to a low prevalence indication for whichServier 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 rightsto XOMA. The termination, which became effective on March 25, 2016, did not result in a change to the maturity date of the Company’s loan with Servier (seeNote 8). As the Company is no longer required to provide services to Servier under the Collaboration Agreement, the Company recognized all remaining deferredrevenue of $0.6 million from the date of notification to March 25, 2016. The Company and Servier completed the final reconciliation of cost sharing under thecollaboration and all related adjustments are reflected in the consolidated statement of comprehensive loss for the year ended December 31, 2016. F-15 NIAIDIn 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 was being performed on acost plus fixed fee basis over a three-year period. The Company recognizes revenue under the arrangement as the services are performed on a proportionalperformance basis. Consistent with the Company’s other contracts with the U.S. government, invoices are provisional until finalized. The Company operated underprovisional rates from 2010 through 2014, subject to adjustment based on actual rates upon agreement with the government. In 2014, upon completion of a NIAIDreview of hours and external expenses, XOMA agreed to exclude certain hours and external expenses resulting in a $1.8 million adjustment to decrease previouslyinvoiced 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 period2007 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 andexternal review. NIAID has deferred payment of the remaining $0.4 million in accounts receivable pending the final agreement on the ongoing 2010 to 2013 finalrate submission. The remaining $0.1 million in deferred revenue in connection with the 2011 NIH rate audit will be recognized upon completion of negotiationswith and approval by the NIH. The Company recognized revenue of zero, $0.2 million and $1.2 million under this contract, for the years ended December 31, 2016,2015, and 2014, respectively.In October 2011, the Company announced that NIAID had awarded the Company a new contract under Contract No. HHSN272201100031C (“NIAID 4”)for up to $28.0 million over five years to develop broad-spectrum antitoxins for the treatment of human botulism poisoning. The contract work was beingperformed on a cost plus fixed fee basis over the life of the contract and the Company recognized revenue under the arrangement as the services were performed ona proportional performance basis. The Company recognized revenue of $1.1 million, $4.9 million and $8.4 million under this contract, for the years endedDecember 31, 2016, 2015, and 2014, respectively. In March 2016, the Company effected a novation of the NIAID 4 to Nanotherapeutics. The novation waseffected upon obtaining government approval to transfer the contract to Nanotherapeutics pursuant to the asset purchase agreement executed in November 2015(see Note 6).TakedaIn November 2006, the Company entered into a 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 andmanufacturing activities for preclinical and early clinical studies and pay royalties on sales of products resulting from the collaboration. Takeda will be responsiblefor clinical trials and commercialization of drugs after an Investigational New Drug Application submission and is granted the right to manufacture once theproduct enters into Phase 2 clinical trials. The Company will recognize revenue on the annual payments when they are received, on the milestones when they areachieved and on the royalties when the underlying sales occur. The Company recognized revenue of $0.1 million, $0.1 million and $1.6 million under thisagreement for the years ended December 31, 2016, 2015, and 2014, respectively.Under the terms of this agreement, the Company may receive milestone payments aggregating up to $19.0 million relating to one undisclosed productcandidate 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 futurequalifying product candidates under the terms of the agreement, the Company would be eligible for milestone payments aggregating up to $20.8 million for eachsuch 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 bepaid under the agreement or the cessation of all research and development activities with respect to all program antibodies, collaboration targets or collaborationproducts. 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 theexpiration 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 antibodytechnologies, including a suite of research and development technologies and integrated information and data management systems. The Company may receivemilestones 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. TheCompany’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 thecessation of all research and development activities with respect to all program antibodies, collaboration targets or collaboration products. The Company’s right toroyalties 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 licensedpatent.F-16 PfizerIn August 2007, the Company entered into a license agreement (the “2007 Agreement”) with Pfizer Inc. (“Pfizer”) for non-exclusive, worldwide rights forXOMA’s patented bacterial cell expression technology for research, development and manufacturing of antibody products. From 2011 through 2015, the Companyreceived 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 otherresearch, development and manufacturing of antibody products. Under the amended license agreement, the Company received a cash payment of $3.8 million infull satisfaction of all obligations to XOMA under the 2007 Agreement, including but not limited to potential milestone, royalty and other fees under the 2007Agreement. 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 forcertain of XOMA’s patented bacterial cell expression technology for vaccine manufacturing. Under the terms of this agreement, the Company received a milestonepayment in November 2012 relating to TRUMENBA®, a meningococcal group B vaccine marketed by Pfizer. The Company received a fraction of a percentage ofsales of TRUMENBA as royalties. The Company’s right to royalties expires on a country-by-country basis upon the expiration of the last-to-expire licensed patent.The Company recognized $0.4 million of royalties earned from the sales of TRUMENBA during the year ended December 31, 2016. The royalties on sales ofTRUMENBA for the years ended December 31, 2015 and 2014 were not material. As discussed below under Sale of Future Revenue Streams, the Company soldits right to receive milestones and royalties on future sales of products to HealthCare Royalty Partners II, L.P. (“HCRP”) in connection with the Royalty InterestAcquisition Agreement entered into in December 2016.Novo NordiskOn December 1, 2015, the Company and Novo Nordisk A/S (“Novo Nordisk ”) entered into a license agreement under which XOMA has granted to NovoNordisk an exclusive, world-wide, royalty-bearing license to XOMA’s XMetA program of allosteric monoclonal antibodies that positively modulate the insulinreceptor (the “XMetA Program”), subject to XOMA’s retained commercialization rights for rare disease indications. Novo Nordisk has an option to add theseretained rights to its license upon payment of an option fee.Novo Nordisk obtained worldwide rights to the XMetA Program and is solely responsible at its expense for the development and commercialization ofantibodies and products containing antibodies arising from the XMetA Program, subject to the Company’s retained rights described above. The Company hastransferred certain proprietary know-how and materials relating to the XMetA Program to Novo Nordisk. Under the agreement, the Company received a $5.0million, non-creditable, non-refundable, upfront payment. Based on the achievement of pre-specified criteria, the Company is eligible to receive up to $290.0million in development, regulatory and commercial milestones. No milestone payments have been received as of December 31, 2016. The Company is also eligibleto 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 digitpercentage rate. Novo Nordisk’s obligation to pay development and commercialization milestones will continue for so long as Novo Nordisk is developing orselling products under the agreement, subject to the maximum milestone payment amounts set forth above. Novo Nordisk’s obligation to pay royalties with respectto 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 tenyears 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 theagreement 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 bedelivered within 60 days from December 1, 2015. The Company delivered the majority of the technology and know-how to Novo Nordisk as of December 31, 2015and determined that any remaining items are perfunctory to the arrangement. Accordingly, the Company recognized the entire $5.0 million upfront fee as revenuein 2015.F-17 Sale of Future Revenue StreamsOn December 21, 2016, the Company entered into two Royalty Interest Acquisition Agreements (together, the “Acquisition Agreements”) with HCRP.Under the first Acquisition Agreement, the Company sold its right to receive milestone payments and royalties on future sales of products subject to a LicenseAgreement, dated August 18, 2005, between XOMA and Wyeth Pharmaceuticals (now Pfizer, Inc.) for an upfront cash payment of $6.5 million, plus potentialadditional payments totaling $4.0 million in the event three specified net sales milestones are met in 2017, 2018 and 2019. Under the second AcquisitionAgreement, the Company sold all rights to royalties under an Amended and Restated License Agreement dated October 27, 2006 between XOMA and Dyax Corp.for a cash payment of $11.5 million.The Company classified the proceeds received from HCRP as deferred revenue, to be recognized as contract and other revenue over the life of the licenseagreements because of the Company's limited continuing involvement in the Acquisition Agreements. Such limited continuing involvement is related to theCompany’s undertaking to cooperate with HCRP in the event of a litigation or dispute related to the license agreements. Because the transaction was structured as anon-cancellable sale, the Company does not have significant continuing involvement in the generation of the cash flows due to HCRP and there are no guaranteedrates of return to HCRP, the Company has recorded the total proceeds of $18.0 million as deferred revenue. The deferred revenue will be recognized as contractand other revenue over the life of the underlying license agreements under the "units-of-revenue" method. Under this method, amortization for a reporting period iscalculated by computing a ratio of the proceeds received from HCRP to the payments expected to be made to HCRP over the term of the Acquisition Agreements,and then applying that ratio to the period’s cash payment. There was no revenue recognized under these arrangements during the year ended December 31, 2016 asthe Acquisition Agreements include an economic commencement date of January 1, 2017. 5. Fair Value MeasurementsThe Company records its financial assets and liabilities at fair value. The carrying amounts of certain of the Company’s financial instruments, includingcash and cash equivalents, trade receivable and accounts payable, approximate their fair value due to their short maturities. Fair value is defined as the exchangeprice 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. Theaccounting guidance for fair value establishes a framework for measuring fair value and a fair value hierarchy that prioritizes the inputs used in valuationtechniques. The accounting standard describes a fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the lastunobservable, 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 orother 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, 2016 Using Quoted Prices inActive Markets forIdentical Assets Significant OtherObservableInputs SignificantUnobservableInputs (Level 1) (Level 2) (Level 3) Total Assets: Money market funds (1) $4,161 $— $— $4,161 F-18 Fair Value Measurements at December 31, 2015 Using Quoted Prices inActive Markets forIdentical Assets Significant OtherObservableInputs SignificantUnobservableInputs (Level 1) (Level 2) (Level 3) Total Assets: Money market funds (1) $42,590 $— $— $42,590 Marketable securities 496 — — 496 Total $43,086 $— $— $43,086 Liabilities: Contingent warrant liabilities $— $— $10,464 $10,464 (1) Included in cash and cash equivalents During the years ended December 31, 2016 and 2015, there were no transfers between Level 1, Level 2, or Level 3 assets or liabilities reported at fair valueon a recurring basis and the valuation techniques used did not change compared to the Company’s established practice.The estimated fair value of the remaining foreign exchange option contract as of December 31, 2015 was zero. The estimated fair value of the foreignexchange option contract at December 31, 2015 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 forLevel 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 comprehensiveloss. In January 2016, the foreign exchange option contract expired.The estimated fair value of the contingent warrant liabilities was determined using the Black-Scholes Model, which requires inputs such as the expectedterm of the warrants, volatility and risk-free interest rate. These inputs are subjective and generally require significant analysis and judgment to develop. TheCompany’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 inthe 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, 2016 and 2015: December 31, 2016 2015Expected volatility 64% 166% - 183%Risk-free interest rate 0.51% 0.64% - 0.74%Expected term (in years) 0.19 0.94 - 1.19 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, 2016and 2015 (in thousands): Balance at December 31, 2014 $31,828 Reclassification of contingent warrant liability to equity upon exercise of warrants (3,552)Decrease in estimated fair value of contingent warrant liabilities upon revaluation (17,812)Balance at December 31, 2015 10,464 Decrease in estimated fair value of contingent warrant liabilities upon revaluation (10,464)Balance at December 31, 2016 $— F-19 The fair value of the Company’s outstanding interest-bearing obligations is estimated using the net present value of the payments, discounted at an interestrate 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, 2016 and 2015 are as follows (in thousands): December 31, 2016 December 31, 2015 Carrying Amount Fair Value Carrying Amount Fair Value Hercules term loan $16,850 $16,453 $19,653 $21,231 Servier loan 12,231 12,242 15,331 15,185 Novartis note 14,086 13,836 13,683 13,394 Total interest bearing obligations $43,167 $42,531 $48,667 $49,810 6. DispositionsBiodefense AssetsOn November 4, 2015, the Company and Nanotherapeutics entered into an asset purchase agreement under which Nanotherapeutics agreed to acquireXOMA’s biodefense business and related assets (including, subject to government approval, certain contracts with the U.S. government), and to assume certainliabilities of XOMA. As part of that transaction, the parties certain conditions, entered into an intellectual property license agreement (the “NanotherapeuticsLicense Agreement”), under which XOMA agreed to license to Nanotherapeutics certain intellectual property rights related to the purchased assets. Under theNanotherapeutics License Agreement, the Company is eligible to receive contingent consideration up to a maximum of $4.5 million in cash and 23,008 shares ofcommon stock of Nanotherapeutics, based upon Nanotherapeutics achieving certain specified future operational objectives. In addition, the Company is eligible toreceive 15% royalties on net sales of any future Nanotherapeutics products covered by or involving the related patents or know-how.On March 17, 2016, the Company effected a novation of the NIAID 4 to Nanotherapeutics. On March 23, 2016, the Company completed the transfer of theNIAID 4 and certain related third-party service contracts and materials, and the grant of exclusive and non-exclusive licenses for certain of its patents and generalknow-how to Nanotherapeutics. The Company believes that the NIAID 4 and certain related third-party service contracts and materials related to the biodefenseprogram transferred to Nanotherapeutics include a sufficient number of key inputs and processes necessary to generate output from a market participant’sperspective. Accordingly, the Company has determined that such assets qualify as a business. The transaction had no impact on the Company’s consolidatedfinancial statements as of, and for the year ended, December 31, 2016. Any contingent consideration or royalties will be recognized in the consolidated statementsof comprehensive loss when received.Manufacturing FacilityOn November 5, 2015, the Company and Agenus West, LLC, a wholly-owned subsidiary of Agenus Inc. (“Agenus”), entered into an asset purchaseagreement under which Agenus agreed, to acquire XOMA’s manufacturing facility in Berkeley, California, together with certain related assets, including certainintellectual property related to the purchased assets under an intellectual property license agreement, and to assume certain liabilities of XOMA, in considerationfor 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 $1.0million.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 atclosing. In addition to the cash consideration, XOMA received 109,211 shares of common stock of Agenus with an aggregate value of $0.5 million, which theCompany subsequently sold in August 2016. The remaining $0.5 million of Agenus common stock will only be received upon the Company’s satisfaction ofcertain organizational matters, which XOMA is unlikely to satisfy. Agenus also paid $0.2 million to the Company as consideration for the employees who wouldnot 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 processesnecessary to generate output from a market participant’s perspective. Accordingly, the Company determined that such assets qualify as a business. The Companyrecorded 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 yearended December 31, 2015. F-20 7. Restructuring ChargesOn December 19, 2016, the Board of Directors approved a restructuring of its business based on its decision to focus the Company’s efforts on clinicaldevelopment, with an initial focus on the X358 clinical programs. The restructuring included a reduction-in-force in which the Company terminated 57 employees(the “2016 Restructuring”). In addition, effective December 21, 2016, the Company’s Chief Executive Officer retired from his position. Subsequent to the 2016Restructuring, the Company further revised its strategy in early 2017 to prioritize out-licensing activities.During the year ended December 31, 2016, the Company recorded charges of $3.8 million related to severance, other termination benefits and outplacementservices in connection with the workforce reduction resulting from the 2016 Restructuring. The Company recognized $0.6 million of non-cash stock-basedcompensation as a result of the acceleration of a former executive’s options and RSUs under his retention benefit agreement. In addition, the Company recognizedan asset impairment charge of $0.2 million related to leasehold improvements. Of the $3.8 million total expenses recognized during 2016, the Company paid $0.2million in 2016 and expects to pay the remaining $3.6 million in 2017.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, didnot meet the primary endpoint of increased time to first acute ocular exacerbation. Due to the results and the Company’s belief they would be predictive of resultsin its other EYEGUARD studies, in August 2015, the Company announced its intention to end the EYEGUARD global Phase 3 program. On August 21, 2015, theCompany, in connection with its efforts to lower operating expenses and preserve capital while continuing to focus on its endocrine product pipeline, implementeda restructuring plan (the “2015 Restructuring”) that included a workforce reduction resulting in the termination of 52 employees during the second half of 2015.During the years ended December 31, 2016 and 2015, the Company recorded a credit of $32,000 and a charge of $2.9 million, respectively, related toseverance, other termination benefits and outplacement services in connection with the workforce reduction resulting from the 2015 Restructuring. In addition, theCompany recognized additional restructuring charges of $29,000 and $0.8 million in contract termination costs in 2016 and 2015, respectively, which primarilyinclude costs in connection with the discontinuation of the EYEGUARD studies.In January 2012, the Company implemented a streamlining of operations, which resulted in a restructuring plan (the “2012 Restructuring”) which included areduction of XOMA’s personnel by 84 positions, or 34%. During the year ended December 31, 2014, the Company incurred $0.1 million in restructuring chargesrelated to facility costs resulting from the 2012 Restructuring. There were no such charges during the years ended December 31, 2016 and 2015.The outstanding restructuring liabilities are included in accrued and other liabilities on the consolidated balance sheets. As of December 31, 2016 and 2015,the components of these liabilities are shown below (in thousands): EmployeeSeverance Contract and OtherBenefits TerminationCosts Stock-basedCompensation AssetImpairment Total Balance at December 31, 2014 $— $— $— $— $— Restructuring charges 2,933 766 — — 3,699 Cash payments (2,590) (650) — — (3,240)Balance at December 31, 2015 343 116 — — 459 Restructuring charges 3,720 29 619 198 4,566 Non-cash charges — — (619) (198) (817)Cash payments (469) (145) — — (614)Balance at December 31, 2016 $3,594 $— $— $— $3,594 F-21 8. Long-Term Debt and Other FinancingsNovartis NoteIn 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 costsunder its collaboration arrangement with Novartis, not to exceed $50.0 million in aggregate principal amount. Interest on the principal amount of the loan accrues atsix-month London Interbank Offered Rate plus 2%, which was equal to 3.32% at December 31, 2016, and is payable semi-annually in June and December of eachyear. 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 theoutstanding 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 electionfor all interest payments. Accrued interest of $0.4 million, $0.3 million and $0.3 million was added to the principal balance of the note for the years endedDecember 31, 2016, 2015, and 2014, 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. Under the terms of the arrangement as restructured in November 2008, the Company did not make any additionalborrowings under the Novartis note.In June 2015, the Company and NVDI, agreed to extend the maturity date of the Note Agreement from June 21, 2015, to September 30, 2015 (the “June2015 Extension Letter”).On September 30, 2015, concurrent with the execution of the License Agreement with Novartis International as discussed in Note 4, XOMA and NVDIexecuted an amendment to the June 2015 Extension Letter (the “Secured Note Amendment”) under which the parties further extended the maturity date of the June2015 Extension Letter from September 30, 2015 to September 30, 2020, and eliminated the mandatory prepayment previously required to be made with certainproceeds of pre-tax profits and royalties. In addition, upon achievement of a specified development and regulatory milestone, the then-outstanding principal amountof 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 Agreementremain unchanged.As required by its obligations under the collaboration with NVDI, in January 2014, the Company made a payment, equal to 25 percent of a $7.0 millionmilestone received, or $1.75 million, toward its outstanding debt obligation to NVDI.As of December 31, 2016 and 2015, the outstanding principal balance under this Secured Note Amendment was $14.1 million and $13.7 million,respectively, and was included in interest bearing obligations – long term in the accompanying consolidated balance sheets.Servier Loan AgreementIn 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 toapproximately $19.5 million at that time. The loan is secured by an interest in the Company’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 and subject to a cap. The interest rateis reset semi-annually in January and July of each year. Interest for the six-month period from mid-July 2016 through mid-January 2017 was reset to 1.81%.Interest is payable semi-annually.On January 9, 2015, Servier and the Company entered into Amendment No. 2 (“Loan Amendment”) to the Servier Loan Agreement initially entered into onDecember 30, 2010 and subsequently amended by a Consent, Transfer, Assumption and Amendment Agreement entered into as of August 12, 2013. The LoanAmendment 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 beimmediately due and payable upon certain customary events of default. In January 2016, the Company made payments of €3.0 million in principal and €0.2 millionin accrued interest to Servier.Upon initial issuance, the loan had a stated interest rate lower than the market rate based on comparable loans held by similar companies, which representsadditional 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 $8.9million. The fair value of this discount, which was determined using a discounted cash flow model, represents the differential between the stated terms and rates ofthe loan, and market rates. Based on the association of the loan with the collaboration arrangement, the Company recorded the offset to this discount as deferredrevenue.F-22 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 thetime of the Loan Amendment was $ 1.9 million, which was being amortized over the remaining term of the Loan Amendment. The Company recorded non-cashinterest expense resulting from the amortization of the loan discount of $0.6 million, $0.7 million and $1.9 million for the years ended Dec ember 31, 2016, 2015,and 2014, respectively. At December 31, 2016 and 2015, the net carrying value of the loan was $12.2 million and $15.3 million, respectively. For the year endedDecember 31, 2016, the Company recorded an unrealized foreign exchange gai n of $5,000 related to the re-measurement of the loan discount. For the years endedDecember 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 loa n discount. On September 28, 2015, Servier terminated the Collaboration Agreement with the required 180-day notice and none of the acceleration clauses weretriggered; therefore, the termination of the Collaboration Agreement had no impact on the loan balance.The outstanding principal balance under this loan was $12.6 million and $16.4 million, using a euro to US dollar exchange rate of 1.052 and 1.091, as ofDecember 31, 2016 and 2015, respectively. The Company recorded unrealized foreign exchange gains of $0.5 million, $1.9 million and $2.4 million for the yearsended December 31, 2016, 2015 and 2014, related to the re-measurement of the loan.In January 2017, the Company entered into Amendment No. 3 to the Servier Loan Agreement (“Amendment No. 3”). Amendment No. 3 extended thematurity date of the €5.0 million due on January 15, 2017 to July 15, 2017. The other terms of the loan remained unchanged.General Electric Capital Corporation Term LoanIn December 2011, the Company entered into a loan agreement (the “GECC Loan Agreement”) with General Electric Capital Corporation (“GECC”). In connection with the GECC Loan Agreement, the Company issued to GECC unregistered warrants that entitle GECC to purchase up to an aggregate of13,158 unregistered shares of XOMA common stock at an exercise price equal to $22.80 per share. These warrants were exercisable immediately and had a five-year term, which expired in December 2016. As of December 31, 2016, all of these warrants expired unexercised.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”). The Company incurred debt issuance costs of approximately $0.2million 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 repaidin 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 andaccreted, 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 topurchase up to an aggregate of 1,967 shares of the Company’s common stock at an exercise price equal to $70.80 per share. These warrants are exercisableimmediately and have a five-year term expiring in September 2017. As of December 31, 2016, 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 LoanAgreement and the subsequent September 27, 2012 amendment had estimated fair values of $0.2 million and $0.1 million, respectively, and were recorded as adiscount to the debt obligation, which was amortized over the term of the loan using the effective interest method. The warrants are classified in permanent equityon the consolidated balance sheets.The GECC Term Loan was paid in full on February 27, 2015, when Hercules Technology Growth Capital, Inc. (“Hercules”) and the Company entered intoa loan and security agreement (the “Hercules Term Loan”), under which the Company borrowed $20.0 million. The Company used a portion of the proceeds underthe Hercules Term Loan to repay GECC’s outstanding principle balance, final payment fee, prepayment fee, and accrued interest totaling $5.5 million. A loss onextinguishment of $0.4 million from the payoff of the GECC Term Loan was recognized as interest expense during the year ended December 31, 2015.F-23 Hercules Term LoanOn February 27, 2015 (“Closing Date”), the Company entered into the Hercules Term Loan as described above. The Hercules Term Loan has a variableinterest 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%. Thepayments under the Hercules Term Loan were interest only until June 1, 2016 . The interest-only period was followed by equal monthly payments of principal andinterest amortized over a 30-month schedule through the scheduled maturity date of September 1, 2018. As security for its obligations under the Hercules TermLoan, the Company granted a security interest in substantially all of its existing and after-acquired assets, excluding its intellectual property assets.If the Company prepays the loan prior to the loan maturity date, it may pay Hercules a prepayment charge, based on a prepayment fee equal to 3.00% of theamount 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 12months 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 theClosing Date. The Hercules Term Loan includes certain affirmative and restrictive covenants, but does not include any financial covenants, and also includesstandard 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 theoutstanding loan balances, and Hercules may subjectively accelerate all outstanding obligations to be immediately due and payable, and take such other actions asset 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 finalpayment 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 beingamortized and accreted, respectively, to interest expense over the term of the term loan using the effective interest method. The Company recorded non-cashinterest expense resulting from the amortization of the debt issuance costs and accretion of the final payment of $0.7 million and $0.5 million for the years endedDecember 31, 2016 and 2015, respectively.In connection with the Hercules Term Loan, the Company issued unregistered warrants that entitle Hercules to purchase up to an aggregate of 9,063unregistered shares of the Company’s common stock at an exercise price equal to $66.20 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. Thefair 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 thewarrants 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. Thewarrants are classified in stockholders’ (deficit) on the consolidated balance sheets. As of December 31, 2016, all of these warrants were outstanding.On December 21, 2016, the Company entered into Amendment No. 1 (the “Amendment”) to the Hercules Term Loan. Under the Amendment, Herculesagreed to release its security interest in the assets subject to the Acquisition Agreements described in Note 4 above. In turn, in January 2017, the Company paid$10.0 million of the outstanding principal balance owed to Hercules. This amount was included in current interest bearing obligations as of December 31, 2016. Allother terms of the Hercules Term Loan remain unchanged. The Company determined the Amendment resulted in a debt modification. As a result, the term loan willcontinue to be accounted for using the effective interest method, with a new effective interest rate based on revised cash flows calculated on a prospective basisupon the execution of the Amendment.The Company evaluated the Hercules Term Loan in accordance with accounting guidance for derivatives and determined there was de minimis value to theidentified derivative features of the loan at inception and December 31, 2016 and 2015.As of December 31, 2016 and 2015, the outstanding principal balance of the Hercules Term Loan was $17.5 million and $20.0 million, respectively. AtDecember 31, 2016 and 2015, the net carrying value of the Hercules Term Loan was $16.9 million and $19.7 million, respectively.F-24 Aggregate future p rincipal, final fee payments and discounts of the Company’s total interest bearing obligations are as follows (in thousands): Year Ending December 31, Amounts 2017 $19,215 2018 11,907 2019 — 2020 15,981 47,103 Less: Interest, final payment fee, discount and issuance cost (3,936) 43,167 Less: interest bearing obligations – current (17,855)Interest bearing obligations – non-current $25,312 Interest ExpenseAmortization of debt issuance costs and discounts are included in interest expense. Interest expense in the consolidated statements of comprehensive loss forthe years ended December 31, 2016, 2015, and 2014 relates to the following debt instruments (in thousands): Year Ended December 31, 2016 2015 2014 Hercules loan $2,628 $2,223 $— Servier loan 892 1,083 2,330 GECC term loan — 548 1,638 Novartis note 405 329 312 Other 21 11 23 Total interest expense $3,946 $4,194 $4,303 9. Income TaxesThe Company has incurred significant losses and as such there was no income tax expense for the years ended December 31, 2016, 2015, and 2014.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 asfollows: Year Ended December 31, 2016 2015 2014 Federal tax at statutory rate 34% 34% 34%Warrant valuation 7% 29% 40%Permanent items and other 2% -15% -1%Valuation allowance -43% -48% -73%Total 0% 0% 0% The significant components of net deferred tax assets as of December 31, 2016 and 2015 were as follows (in thousands): December 31, 2016 2015 Capitalized research and development expenses $53,557 $50,808 Net operating loss carryforwards 123,672 115,869 Research and development and other credit carryforwards 25,297 24,268 Other 15,400 18,748 Total deferred tax assets 217,926 209,693 Valuation allowance (217,926) (209,693)Net deferred tax assets $— $— F-25 The net increase in the valuation allowance was $8.2 million, $19.6 million, and $29.9 million for the years ended December 31, 2016, 2015, and 2014,respectively.As of December 31, 2016, the Company had federal net operating loss carry-forwards of approximately $335.9 million and state net operating loss carry-forwards of approximately $196.0 million to offset future taxable income. The net operating loss carryforwards begin to expire in 2018 for federal and 2017 forstate purposes. The net operating loss carry-forwards include $5.2 million which relates to stock option deductions that will be recognized through additional paidin 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 in2016, 2015, and 2014. California net operating losses of $41.2 million, $22.4 million, and $54.3 million, expired in the years 2016, 2015, and 2014, 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 ofavailable evidence, which includes the Company’s historical operating performance and carry-back potential, the Company has determined that total deferred taxassets 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 taxattributes that can be utilized to an annual limitation), the Company experienced ownership changes in 2009 and 2012 which substantially limit the future use of itspre-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 willexpire as a result of the annual limitations in the deferred tax assets as of December 31, 2016. To the extent that the Company does not utilize its carry-forwardswithin the applicable statutory carry-forward periods, either because of Section 382 limitations or the lack of sufficient taxable income, the carry-forwards willexpire unused.The Company files income tax returns in the U.S. federal jurisdiction, State of California, Maryland, Alabama and Texas. The Company’s federal incometax returns for tax years 2013 and beyond remain subject to examination by the Internal Revenue Service. The Company’s State income tax returns for tax years2012 and beyond remain subject to examination by state tax authorities. 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): Year Ended December 31, 2016 2015 2014 Balance at January 1 $9,666 $5,503 $4,274 Increase related to current year tax position 592 2,687 720 (Decrease) Increase related to prior year’s tax positions (1,633) 1,476 509 Balance at December 31 $8,625 $9,666 $5,503 As of December 31, 2016, the Company had a total of $7.0 million of net unrecognized tax benefits, none of which would affect the effective tax rate uponrealization. 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 ratebenefit 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 andpenalties accrued on any unrecognized tax benefits as a component of income tax expense. As of December 31, 2016, the Company has not accrued interest orpenalties related to uncertain tax positions. 10. Compensation and Other Benefit PlansThe 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 thedate of grant. Additionally, the Company has an Employee Stock Purchase Plan (“ESPP”) that allows employees to purchase Company shares at a purchase priceequal 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 offeringperiod.F-26 Employee Stock Purchase PlanUnder the ESPP approved by the Company’s stockholders in May 1998 (the “1998 ESPP”), the Company was authorized to issue up to 233,333 shares ofcommon 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. Anemployee could 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’scompensation.In May 2015, the Company’s stockholders approved the 2015 Employee Stock Purchase Plan (the “2015 ESPP”) which replaced the 1998 ESPP. Under the2015 ESPP, the Company reserved 15,000 shares of common stock for issuance as of its effective date of July 1, 2015, subject to adjustment in the event of a stocksplit, stock dividend, combination or reclassification or similar event. The 2015 ESPP allows eligible employees to purchase shares of the Company’s commonstock 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-monthoffering periods ending on May 31 and November 30 of each year, with the exception of the first offering period, which ran from July 1, 2015 through November30, 2015, as the Company transitioned from the 1998 ESPP. At the end of each offering period, employees are able to purchase shares at 85% of the lower of thefair 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, 2016, 2015, and 2014, employees purchased 7,070, 6,029, and 885 shares of common stock, respectively, under theESPP plans. Net payroll deductions under 1998 ESPP and 2015 ESPP totaled $60,000, $170,000, and $74,000 for the years ended December 31, 2016, 2015, and2014, respectively.Deferred Savings PlanUnder section 401(k) of the Internal Revenue Code of 1986, the Board of Directors adopted, effective June 1, 1987, a tax-qualified deferred compensationplan for employees of the Company. Participants may make contributions which defer up to 50% of their eligible compensation per payroll period, up to amaximum for 2016 and 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 to50% of the salary deferred by the participants. The expense related to these contributions was $0.5 million, $0.8 million, and $1.0 million for the years endedDecember 31, 2016, 2015, and 2014, respectively, and 100% was paid in common stock in each year.Stock Option PlansIn May 2010, the Compensation Committee and the full Board adopted, and in July 2010 the Company’s stockholders approved, a new equity-basedcompensation plan, the 2010 Long Term Incentive and Share Award Plan, which has since been amended and restated as the Amended and Restated 2010 LongTerm Incentive and Stock Award Plan (the “2010 Plan”). The 2010 Plan is intended to consolidate the Company’s long-term incentive compensation under a singleplan, by replacing the Option Plan, the Restricted Plan and the 1992 Directors Share Option Plan (the “Directors Plan”) going forward, and to provide a morecurrent set of terms under which to provide this type of compensation. In May 2014, the Company’s stockholders approved an amendment to the Company’s 2010Plan to (a) increase the number of shares of common stock issuable over the term of the plan by an additional 267,500 to 938,560 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-basedaward issued, the number of available shares under the plan will be reduced by 1.18 shares.In February 2016, the Company’s Board of Directors approved an amendment to the 2010 Plan to, among other things, allow for an increase in the numberof shares of common stock reserved for issuance and recommended that the amendment be submitted to the Company’s shareholders for approval at the 2016annual meeting. At the May 2016 annual meeting, the shareholders approved an amendment to the 2010 Plan to, among other things, increase the aggregate numberof shares authorized for issuance by 170,000 shares to an aggregate of 1,108,560 shares.The 2010 Plan grants stock options, RSUs, and other stock-based awards to eligible employees, consultants and directors. No further grants or awards willbe made under the Option Plan, the Restricted Share Plan or the Directors Plan. Shares underlying options previously issued under the Option Plan, the RestrictedShare Plan or the Directors Plan that are currently outstanding will, upon forfeiture, cancellation, surrender or other termination, become available under the 2010Plan. Stock-based awards granted under the 2010 Plan may be exercised when vested and generally expire ten years from the date of the grant or three to sixmonths from the date of termination of employment (longer in case of death or certain retirements). Vesting periods vary based on awards granted, however, certainstock-based awards may vest immediately or may accelerate based on performance-driven measures.F-27 As of December 31, 2016, the Company had 94,815 shares availab le for grant under the stock option plans. As of December 31, 2016, options and RSUscovering 671,493 shares of common stock were outstanding under the stock option plans.Stock OptionsStock options generally vest monthly over four years for employees and one year for directors. In December of 2016, the Company granted 207,100 optionsto employees that will vest in one year from the grant date. Stock options held by employees who qualify for retirement age (defined as employees that are aminimum 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 vestdate or the date of retirement.Stock Option Plans SummaryThe following table summarizes the Company’s stock option activity: 2016 2015 2014 Number ofshares WeightedAverageExercisePricePer Share Number ofshares WeightedAverageExercisePricePer Share Number ofshares WeightedAverageExercisePricePer Share Outstanding at beginning of year 384,382 $126.46 384,948 $162.88 360,658 $168.05 Granted 234,962 6.29 89,844 75.56 94,487 133.88 Exercised — — (8,177) 37.89 (45,737) 78.18 Forfeited, expired or cancelled (51,052) 116.15 (82,233) 250.17 (24,460) 285.31 Outstanding at end of year 568,292 $77.70 384,382 $126.46 384,948 $162.88 Exercisable at end of year 315,384 $127.08 280,149 $138.29 245,346 $199.22 Weighted-average grant-date fair value $4.90 $51.92 $98.85 The aggregate intrinsic value of stock options exercised in 2015, and 2014 was $0.4 million, and $2.9 million, respectively. No stock options were exercisedin 2016.As of December 31, 2016, there were 544,021 stock options vested and expected to vest with a weighted average exercise price per share of $80.52,aggregate intrinsic value of zero, and a weighted average remaining contractual term of 6.93 years. As of December 31, 2016, there were 315,384 stock optionsexercisable with an aggregate intrinsic value of zero and a weighted average remaining contractual term of 5.06 years.As of December 31, 2016, $2.4 million of total unrecognized compensation expense related to stock options is expected to be recognized over a weightedaverage period of 1.1 years. Restricted Stock UnitsRSUs generally vest over three years for employees and one year for directors. In 2016, the Company granted 114,517 RSUs to employees that will vest oneyear from the date of grant. RSUs held by employees who qualify for retirement age (defined as employees that are a minimum of 55 years of age and the sum oftheir 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, 2016 is summarized below: Weighted- Number of Average Grant- Shares Date Fair Value Unvested balance at January 1, 2016 106,205 $81.42 Granted 127,367 14.82 Vested (108,649) 49.17 Forfeited (33,695) 46.32 Unvested balance at December 31, 2016 91,228 $39.82 F-28 The total grant-date fair value of RSUs that vested in 2016, 2015, and 2014 was $5.3 million, $5.5 million and $3.9 million, respectively. As of December31, 2016, $1.4 million of total unrecognized compensation expense related to employee RSUs was expected to be recognized over a weighted avera ge period of0.6 years.Of the 91,228 outstanding RSUs as of December 31, 2016, 12,419 were forfeited upon termination in February 2017 of the majority of the employeesincluded in the 2016 Restructuring.Stock-based Compensation ExpenseThe fair value of stock options granted during the years ended December 31, 2016, 2015, and 2014, was estimated based on the following weighted averageassumptions for: Year Ended December 31, 2016 2015 2014 Dividend yield 0% 0% 0%Expected volatility 101% 84% 92%Risk-free interest rate 1.84% 1.40% 1.72%Expected term 5.6 years 5.6 years 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): Year Ended December 31, 2016 2015 2014 Research and development $2,805 $5,022 $5,557 Selling, general and administrative 4,221 4,705 5,215 Restructuring 619 — — Total stock-based compensation expense $7,645 $9,727 $10,772 11. Net Loss per Share of Common StockPotentially 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 netloss per share (in thousands): Year Ended December 31, 2016 2015 2014 Common stock options and RSUs 548 550 324 Warrants for common stock 894 960 104 Total 1,442 1,510 428 F-29 The following is a reconciliation of the numerators and denominators used in calculating basic and diluted net loss per share of common stock (inthousands): Year Ended December 31, 2016 2015 2014 Numerator Net loss, basic $(53,530) $(20,606) $(38,301)Adjustment for revaluation of contingent warrant liabilities — — (39,512)Net loss, diluted $(53,530) $(20,606) $(77,813) Denominator Weighted average shares outstanding used for basic net loss per share 6,021 5,890 5,372 Effect of dilutive warrants — — 395 Weighted average shares outstanding and dilutive securities used for diluted net loss per share 6,021 5,890 5,767 Basic net loss per share of common stock $(8.89) $(3.50) $(7.13)Diluted net loss per share of common stock $(8.89) $(3.50) $(13.49) 12. Capital StockRegistered Direct OfferingsOn December 8, 2014, the Company completed a registered direct offering of 404,858 shares of its common stock, and accompanying warrants to purchaseone share of common stock for each share purchased at an offering price of $98.80 per share to certain institutional investors. Total gross proceeds from theoffering were approximately $40.0 million before deducting underwriting discounts, commissions and estimated offering expenses totaling approximately $2.3million. The warrants, which represent the right to acquire up to an aggregate of 404,833 shares of common stock, were exercisable immediately, had a two-yearterm and an exercise price of $158.01 per share. As of December 31, 2016, all of these warrants expired unexercised.ATM Agreements 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 anaggregate 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 onthe 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 orthrough a market maker. Cowen also may sell the shares in privately negotiated transactions, subject to the Company’s prior approval. The Company will payCowen 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. Offeringcosts, consisting of legal, accounting, and filing fees, incurred in connection with the 2015 ATM Agreement are capitalized. The capitalized offering costs will beoffset against proceeds from the sale of common stock under this agreement. In the event the offering is terminated, all capitalized offering costs will be expensed.As of December 31, 2016 and 2015, $0.2 million and $0.1 million, respectively, of offering costs were capitalized, which are included in prepaid expenses andother current assets in the consolidated balance sheets. For the year ended December 31, 2016, the Company sold a total of 10,365 shares of common stock underthis agreement for aggregate gross proceeds of $56,000. Total offering costs of $56,000 were offset against the proceeds upon sale of common stock. There were noshares of common stock sold under the 2015 ATM Agreement during the year ended December 31, 2015.F-30 Common Stock Wa rrantsAs of December 31, 2016 and 2015, the following common stock warrants were outstanding: Exercise Price Number of Shares at December 31, Issuance Date Expiration Date Balance Sheet Classification per Share 2016 2015 December 2011 December 2016 Stockholders' equity $22.80 — 13,158 March 2012 March 2017 Contingent warrant liabilities $35.20 479,277 479,277 September 2012 September 2017 Stockholders' equity $70.80 1,967 1,967 December 2014 December 2016 Contingent warrant liabilities $158.01 — 404,833 February 2015 February 2020 Stockholders' (deficit) $66.20 9,063 9,063 February 2016 February 2021 Stockholders' (deficit) $15.40 8,249 — 498,556 908,298 In February 2016, in conjunction with services provided by a third-party consultant, the Company issued a warrant to purchase up to an aggregate of 8,249unregistered shares of the Company’s common stock at an exercise price equal to $15.40 per share. These warrants were exercisable immediately and have a five-year term expiring in February 2021. The estimated fair value of the warrants of $0.1 million was calculated using the Black-Scholes Model and was classified instockholders’ (deficit) on the consolidated balance sheet. As of December 31, 2016, all of these warrants were outstanding.In February 2015, the Company issued Hercules five-year warrants in connection with the Hercules Term Loan (see Note 8) that entitle Hercules topurchase up to an aggregate of 9,063 unregistered shares of the Company’s common stock at an exercise price equal to $66.20 per share. The warrants areclassified in stockholders’ (deficit) on the consolidated balance sheets. As of December 31, 2016, 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 toan aggregate of 404,833 shares of the Company’s common stock at an exercise price of $158.01 per share. These warrants contained provisions that werecontingent on the occurrence of a change in control, which could conditionally obligate the Company to repurchase the warrants for cash in an amount equal totheir 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 warrantsissued in December 2014 as a liability at estimated fair value. In addition, the estimated fair value of the liability related to the warrants was revalued at eachreporting 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-ScholesModel. As of December 31, 2015, all of these warrants were outstanding and had an estimated fair value of $3.0 million. During the year ended December 31,2016, the Company revalued the warrants using the Black-Scholes Model, and recorded a $3.0 million reduction in the estimated fair value as a gain on therevaluation of contingent warrant liabilities line of the Company’s consolidated statement of comprehensive loss. The decrease in the estimated fair value of thewarrants is primarily due to the decrease in the market price of the Company’s common stock at December 31, 2016 compared to December 31, 2015. In December2016, all of these warrants expired unexercised. In September 2012, the Company issued to GECC five-year warrants in connection with the amendment to the GECC Loan Agreement (see Note 8) thatentitle GECC to purchase up to an aggregate of 1,967 unregistered shares of the Company’s common stock at an exercise price equal to $70.80 per share. Thewarrants are classified in stockholders’ (deficit) on the consolidated balance sheets. As of December 31, 2016 and 2015, all of these warrants were outstanding.In March 2012, in connection with an underwritten offering, the Company issued five-year warrants to purchase 741,729 shares of the Company’s commonstock at an exercise price of $35.20 per share. These warrants contain provisions that are contingent on the occurrence of a change in control, which couldconditionally 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 dateof 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 theliability will be reclassified to stockholders' equity at its then estimated fair value, or expiration of the warrants. The Company revalued the warrants at December31, 2016 using the Black-Scholes Model and recorded a $7.5 million reduction in the estimated fair value as a gain on the revaluation of contingent warrantliabilities line of the Company’s consolidated statement of comprehensive loss. The decrease in the estimated fair value of the warrants is primarily due to thedecrease in the market price of the Company’s common stock at December 31, 2016 compared to December 31, 2015. As of December 31, 2016 and 2015, 479,277and 479,277, respectively, of these warrants were outstanding and had an estimated fair value of zero and $7.5 million, respectively. F-31 13. Legal Proceedings, Commitments and ContingenciesCollaborative Agreements, Royalties and Milestone PaymentsThe Company has committed to make potential future “milestone” payments to third parties as part of licensing and development programs. Payments underthese agreements become due and payable only upon the Company’s achievement of certain developmental, regulatory and commercial milestones. Because it isuncertain if and when these milestones will be achieved, such contingencies, aggregating up to $7.5 million (assuming one product per contract meets allmilestones events) have not been recorded on the accompanying consolidated balance sheets. The Company is unable to determine precisely when and if paymentobligations under the agreements will become due as these obligations are based on milestone events, the achievement of which is subject to a significant numberof risks and uncertainties.Legal ProceedingsOn July 24, 2015, a purported securities class action lawsuit was filed in the United States District Court for the Northern District of California, captionedMarkette v. XOMA Corp., et al. (Case No. 3:15-cv-3425) against the Company, its Chief Executive Officer and its Chief Medical Officer. The complaint assertsthat 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 materiallyfalse or misleading statements regarding the Company’s EYEGUARD-B study between November 6, 2014 and July 21, 2015. The plaintiff also alleges thatMessrs. Varian and Rubin violated Section 20(a) of the Exchange Act. The plaintiff seeks class certification, an award of unspecified compensatory damages, anaward of reasonable costs and expenses, including attorneys’ fees, and other further relief as the Court may deem just and proper. On May 13, 2016, the Courtappointed a lead plaintiff and lead counsel. The lead plaintiff filed an amended complaint on July 8, 2016 asserting the same claims and adding a former director asa defendant. On September 2, 2016, defendants filed a motion to dismiss with prejudice the amended complaint. Plaintiff filed his opposition to the motion todismiss on October 7, 2016. Defendants filed a reply on October 21, 2016. The judge in the case has advised that he will rule on the motion based on thosepleadings, but has not yet issued a ruling. Based on a review of allegations, the Company believes that the plaintiff’s allegations are without merit, and intends tovigorously 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 orfinancial condition, although an unfavorable outcome could have a material adverse effect on its results of operations for the period in which such a loss isrecognized. 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 theCounty 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 onthe dissemination of allegedly false and misleading statements related to the Company’s EYEGUARD-B study. The plaintiff is seeking unspecified monetarydamages and other relief, including reforms and improvements to the Company’s corporate governance and internal procedures. This action is currently stayedpending 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 anunfavorable outcome could have a material adverse effect on its results of operations for the period in which such a loss is recognized. The Company cannotreasonably 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 forthe 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 oflaw based on the dissemination of allegedly false and misleading statements related to the Company’s EYEGUARD-B study. Plaintiffs seek unspecified monetarydamages and other relief including reforms and improvements to the Company’s corporate governance and internal procedures. Both actions are currently stayedpending 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 anunfavorable outcome could have a material adverse effect on its results of operations for the period in which such a loss is recognized. The Company cannotreasonably estimate the possible loss or range of loss that may arise from this lawsuitF-32 Operating LeasesAs of December 31, 2016, the Company leased administrative, research facilities, and office equipment under operating leases expiring on various datesthrough April 2023. These leases require the Company to pay taxes, insurance, maintenance and minimum lease payments. For each facility lease, the Companyhas two successive renewal options to extend the lease for five years upon the expiration of the initial lease term.The Company estimates future minimum lease payments, excluding sub-lease income (in thousands): Year Ending December 31, Amounts 2017 $3,621 2018 3,728 2019 3,837 2020 3,940 2021 3,101 Thereafter 3,406 Total minimum lease payments $21,633 Total rental expense, including other costs required under the Company’s leases, was approximately $3.8 million, $3.7 million and $3.5 million for the yearsended December 31, 2016, 2015, and 2014, respectively. Rental expense based on leases allowing for escalated rent payments are recognized on a straight-linebasis. 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 asset purchase agreement with Agenus, the Company entered into sublease agreements withAgenus for portions of two leased buildings through December 31, 2016, subject to early termination by Agenus. The terms of the sublease agreements commencedon December 31, 2015, and were terminated under the early termination option on October 31, 2016. Under the terms of the sublease agreements, the Companyreceived an aggregate of $0.3 million over the sublease term. Capital LeasesDuring the year ended December 31, 2015, the Company entered into capital lease agreements for certain network hardware and equipment for use by theCompany and its employees. The lease terms are for three years. The current portion of capital lease obligations is included in the accrued and other liabilities lineand the noncurrent capital lease obligations is included in other liabilities – long term line in the consolidated balance sheets.The following is a schedule of future minimum lease payments due under the capital lease obligation as of December 31, 2016 (in thousands): Year Ending December 31, Amounts 2017 $116 2018 72 Total capital lease obligations 188 Less: amount representing interest (15)Present value of net minimum capital lease payments 173 Less: current portion (104)Total noncurrent capital lease obligations $69 14. Concentration of Risk, Segment and Geographic InformationConcentration of RiskCash equivalents and receivables are financial instruments which potentially subject the Company to concentrations of credit risk, as well as liquidity riskfor certain cash equivalents such as money market funds. The Company has not encountered such issues during 2016 and 2015. The Company’s policy is to focuson investments with high credit quality and liquidity to limit the amount of credit exposure. The Company currently maintains a portfolio of cash equivalents andhave not experienced any losses.F-33 The Company has not experienced any significant credit losses and does not generally require collateral on receivables. For the year ended December 31,2016, three customers represented 27%, 22%, and 19% of total revenues, and as of December 31, 2016, one customer represented 85% of the accounts receivablebalance.For the year ended December 31, 2015, one customer represented 67% of total revenues, 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.Segment InformationThe Company has determined that it operates in one business segment as it only reports operating results on an aggregate basis to the chief operatingdecision maker of the Company.Geographic InformationRevenue attributed to the following geographic regions for the years ended December 31, 2016, 2015, and 2014 was as follows (in thousands): Year Ended December 31, 2016 2015 2014 United States $3,822 $10,685 $11,756 Europe 1,642 44,662 5,510 Asia Pacific 100 100 1,600 Total $5,564 $55,447 $18,866 The Company’s property and equipment is held in the United States. 15. Subsequent Events From January 1 through March 14, 2017, the Company sold 110,252 shares of common stock under the 2015 ATM Agreement for aggregate net cashproceeds of $0.6 million.In January 2017, the Company entered into Amendment No. 3 to the Servier Loan Agreement. Amendment No. 3 extended the maturity date of the portionof the loan equal to €5.0 million due on January 15, 2017 to July 15, 2017. The other terms of the loan remained unchanged In February 2017, the Company executed an Amendment and Restatement to both the asset purchase agreement and Nanotherapeutics License Agreementprimarily to (i) remove the obligation to issue 23,008 shares of common stock of Nanotherapeutics under the asset purchase agreement, and (ii) revise the paymentschedule related to the timing of the $4.5 million cash payments due to the Company under the Nanotherapeutics License Agreement. Of the $4.5 million, $3.0million is contingent upon Nanotherapeutics achieving certain specified future operating objectives. In February 2017, the Company sold 1,200,000 shares of its common stock and 5,003 shares of Series X convertible preferred stock directly toBiotechnology Value Fund, L.P. and certain of its affiliates (“BVF”) in a registered direct offering, for aggregate net proceeds of $24.9 million. BVF purchased theshares of common stock from the Company at a price of $4.03 per share, the closing stock price on the date of purchase. Each share of Series X convertiblepreferred stock has a stated value of $4,030 per share and is convertible into 1,000 shares of registered common stock based on a conversion price of $4.03 pershare of common stock. The total number of shares of common stock issued upon conversion of all issued Series X convertible preferred stock will be 5,003,000shares. Each share is convertible at the option of the holder at any time, provided that the holder will be prohibited from converting into common stock if, as aresult of such conversion, the holder, together with its affiliates, would beneficially own a number of shares above a conversion blocker, which is initially set at19.99% of the total common stock then issued and outstanding immediately following the conversion of such shares. In February 2017, the Board of Directors approved the grant of 1,018,000 stock options to members of the board, executives, and non-executive employees,subject to future approval by the Company’s shareholders of a commensurate increase in the available shares under the 2010 Plan.F-34 16. Quarterly Financial Information (unaudi ted)The following is a summary of the quarterly results of operations for the years ended December 31, 2016 and 2015: Consolidated Statements of Operations Quarter Ended March 31 June 30 September 30 December 31 (In thousands, except per share amounts) 2016 Total revenues $3,962 $443 $635 $524 Restructuring costs (36) 21 — (4,551)Operating costs and expenses (17,915) (18,482) (12,727) (13,432)Loss from operations (13,989) (18,018) (12,092) (17,459)Other income (expense), net (1) 5,624 2,858 (433) (21)Net loss $(8,365) $(15,160) $(12,525) $(17,480)Basic net loss per share of common stock $(1.45) $(2.57) $(2.10) $(2.89)Diluted net loss per share of common stock $(1.45) $(2.57) $(2.10) $(2.89) 2015 Total revenues (2) $2,651 $2,539 $2,074 $48,183 Restructuring costs — — (2,561) (1,138)Operating costs and expenses (25,224) (24,752) (23,191) (18,305)(Loss) income from operations (22,573) (22,213) (23,678) 28,740 Other income (expense), net (1) 855 (1,546) 23,198 (3,389)Net (loss) income $(21,718) $(23,759) $(480) $25,351 Basic net (loss) income per share of common stock $(3.74) $(4.04) $(0.08) $4.27 Diluted net (loss) income per share of common stock (3) $(3.74) $(4.04) $(0.08) $4.24 (1)Fluctuations in 2016 and 2015 primarily relate to (losses) gains on the revaluation of the contingent warrant liabilities and a $3.5 million gain from thesale of the Company’s manufacturing facility during the three months ended December 31, 2015 (see Note 6). (2)In the fourth quarter of 2015, total revenues include upfront and milestone payments relating to various out-licensing arrangements, including a $37.0million upfront payment from Novartis, a $5.0 million upfront payment from Novo Nordisk and a $3.8 million payment from Pfizer. (3)For the quarter ended December 31, 2015, the Company’s diluted net income per share of common stock was computed by giving effect to allpotentially dilutive common stock equivalents outstanding during the period. F-35 Incorporation By ReferenceExhibit Number Exhibit Description Form SEC File No. Exhibit Filing Date 3.1 Certificate of Incorporation of XOMA Corporation 8-K 000-14710 3.1 01/03/2012 3.2 Certificate of Amendment of Certificate of Incorporation of XOMA Corporation 8-K 000-14710 3.1 05/31/2012 3.3 Certificate of Amendment of Certificate of Incorporation of XOMA Corporation 8-K 000-14710 3.1 05/28/2014 3.4 Certificate of Amendment to the Amended Certificate of Incorporation of XOMACorporation 8-K 000-14710 3.1 10/18/2016 3.5 Certificate of Designation of Preferences, Rights and Limitations of Series XConvertible Preferred Stock 8-K 000-14710 3.1 02/16/2017 3.6 By-laws of XOMA Corporation 8-K 000-14710 3.2 01/03/2012 4.1 Reference is made to Exhibits 3.1, 3.2 and 3.3 4.2 Specimen of Common Stock Certificate 8-K 000-14710 4.1 01/03/2012 4.3 Form of Series X Preferred Stock Certificate 8-K 000-14710 4.1 02/16/2017 4.4 Form of Warrant (March 2012 Warrants) 8-K 000-14710 4.1 03/07/2012 4.5 Form of Warrant (September 2012 Warrants) 8-K 000-14710 4.10 10/03/2012 4.6 Registration Rights Agreement, dated June 12, 2014, by and among XOMACorporation, 667, L.P., Baker Brothers Life Sciences, L.P., and 14159, L.P. 8-K 000-14710 4.1 06/12/2014 4.7 Form of Warrants (February 2015 Warrants) 10-Q 000-14710 4.10 05/07/2015 4.8 Form of Warrants (February 2016 Warrants) 10-Q 000-14710 4.9 05/04/2016 4.9 Warrant Agreement, by and between XOMA Corporation and Hercules TechnologyIII, L.P., dated February 27, 2015 10-Q 000-14710 4.9 05/04/2016 10.1* 1981 Share Option Plan as amended and restated S-8 333-171429 10.1 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 08/07/2007 10.6* 1992 Directors Share Option Plan as amended and restated S-8 333-171429 10.1 12/27/2010 10.7* Form of Share Option Agreement for 1992 Directors Share Option Plan (initialgrants) 10-K 000-14710 10.3A 03/11/2008 10.8* Form of Share Option Agreement for 1992 Directors Share Option Plan (subsequentgrants) 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 StockAward Plan S-8 000-14710 99.1 09/12/2014 10.11* Form of Stock Option Agreement for Amended and Restated 2010 Long TermIncentive 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 LongTerm Incentive and Stock Award Plan 10-K 000-14710 10.6B 03/14/2012 Incorporation By ReferenceExhibit Number Exhibit Description Form SEC File No. Exhibit Filing Date 10.13* Management Incentive Compensation Plan as amended and restated 8-K 000-14710 10.3 11/06/2007 10.14* CEO Incentive Compensation Plan 10-K 000-14710 10.4A 03/11/2008 10.15* Amendment No. 1 to CEO Incentive Compensation Plan 10-K 000-14710 10.7B 03/14/2012 10.16* 2016 Incentive Compensation Plan 10-Q 000-14710 10.1 05/04/2016 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-employeeDirectors 10-K 000-14710 10.8 03/08/2007 10.20* 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 10.21* Officer Employment Agreement dated March 19, 2013 between XOMACorporation and Paul Rubin 10-K 000-14710 10.23 03/12/3014 10.22* Employment Agreement effective as of January 4, 2012 between XOMA (US) LLCand John Varian 10-K 000-14710 10.10G 03/14/2012 10.23* Officer Employment Agreement dated March 10, 2014 between XOMACorporation and Pat Scannon 10-K 000-14710 10.25 03/12/2014 10.24* 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 10.25* Retention Benefit Agreement entered into between XOMA Corporation and JohnVarian, dated March 11, 2014 10-K 000-14710 10.28 03/12/2014 10.26* Employment Agreement by and between XOMA Corporation and Thomas Burns,dated as of April 3, 2015 10-Q 000-14710 10.4 05/07/2015 10.27* 2015 Employee Stock Purchase Plan S-8 333-204367 99.1 05/21/2015 10.28* Form of Subscription Agreement and Authorization of Deduction under the 2015Employee Stock Purchase Plan S-8 333-204367 99.2 05/21/2015 10.29 * Change of Control and Severance Agreement entered into between XOMACorporation and Thomas Burns, dated October 28, 2015 10-K 000-14710 10.30 03/09/2016 10.30 * Change of Control Agreement entered into between XOMA Corporation and JimNeal, dated January 3, 2011 10-K 000-14710 10.31 03/09/2016 10.31 * Employment Agreement entered into between XOMA Corporation and Jim Neal,dated October 29, 2014 10-K 000-14710 10.32 03/09/2016 10.32 Lease of premises at 804 Heinz Street, Berkeley, California dated February 13,2013 10-K 000-14710 10.29 03/12/2014 10.33 Lease of premises at 2910 Seventh Street, Berkeley, California dated February 13,2013 10-K 000-14710 10.30 03/12/2014 10.34 First amendment to lease of premises at 2910 Seventh Street, Berkeley, Californiadated February 22, 2013 10-K 000-14710 10.31 03/12/2014 10.35 Lease of premises at 5860 and 5864 Hollis Street, Emeryville, California datedFebruary 13, 2013 10-K 000-14710 10.32 03/12/2014 Incorporation By ReferenceExhibit Number Exhibit Description Form SEC File No. Exhibit Filing Date 10.36† 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 10.37† License Agreement, dated as of December 29, 2003, by and between DiversaCorporation (n/k/a BP Biofuels Advanced Technology Inc.) and XOMA IrelandLimited 8-K/A 000-14710 2 03/19/2004 10.38 First Amendment, dated October 28, 2014, to the License Agreement betweenXOMA (US) LLC (assigned to it by XOMA Ireland Limited) and BP BiofuelsAdvanced Technology Inc. (previously Diversa Corporation, previously VereniumCorporation). 10-Q 000-14710 10.3 11/06/2014 10.39† GSSM License Agreement, effective as of May 2, 2008, by and between VereniumCorporation (n/k/a BP Biofuels Advanced Technology Inc.) and XOMA IrelandLimited 10-K 000-14710 10.25A 03/10/2011 10.40† Secured Note Agreement, dated as of May 26, 2005, by and between ChironCorporation and XOMA (US) LLC 10-Q 000-14710 10.3 08/08/2005 10.41† 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 10-K 000-14710 10.24C 03/11/2009 10.42† Amendment No. 1 to Amended and Restated Research, Development andCommercialization Agreement, effective as of April 30, 2010, by and betweenNovartis Vaccines and Diagnostics, Inc. and XOMA (US) LLC 10-K 000-14710 10.25B 03/14/2012 10.43† Collaboration Agreement, dated as of November 1, 2006, between TakedaPharmaceutical Company Limited and XOMA (US) LLC 10-K 000-14710 10.46 03/08/2007 10.44 First Amendment to Collaboration Agreement, effective as of February 28, 2007,between Takeda Pharmaceutical Company Limited and XOMA (US) LLC 10-Q/A 000-14710 10.48 03/05/2010 10.45 Second Amendment to Collaboration Agreement, effective as of February 9, 2009,among Takeda Pharmaceutical Company Limited and XOMA (US) LLC 10-K 000-14710 10.31B 03/11/2009 10.46† License Agreement, effective as of August 27, 2007, by and between Pfizer Inc. andXOMA Ireland Limited 8-K 000-14710 2 09/13/2007 10.47† Discovery Collaboration Agreement dated September 9, 2009, by and betweenXOMA Development Corporation and Arana Therapeutics Limited 10-Q/A 000-14710 10.35 03/05/2010 10.48† Loan Agreement dated as of December 30, 2010, by and between XOMA IrelandLimited and Les Laboratoires Servier 10-K/A 000-14710 10.42A 05/26/2011 10.49† Amendment No. 2, effective January 9, 2015, to the Loan Agreement, effectiveDecember 30, 2010, by and among XOMA (US) LLC, Les Laboratoires Servier andInstitut de Recherches Servier 10-K 000-14710 10.71 03/11/2015 10.50 Amendment No. 1 (Consent, Transfer, Assumption and Amendment), effectiveJanuary 9, 2015, to the Loan Agreement, effective December 30, 2010, by andamong XOMA (US) LLC, Les Laboratoires Servier and Institut de RecherchesServier 10-K 000-14710 10.74 03/11/2015 Incorporation By ReferenceExhibit Number Exhibit Description Form SEC File No. Exhibit Filing Date 10.51 Loan and Security Agreement, dated February 27, 2015, by and among XOMACorporation, XOMA(US) LLC and XOMA Commercial as borrowers and HerculesTechnology Growth Capital, Inc., as agent and lender 10-Q 000-14710 10.3 05/07/2015 10.52 Letter Agreement, dated June 19, 2015, by and between XOMA (US) LLC andNovartis Vaccines and Diagnostics, Inc. 10-Q 000-14710 10.1 08/10/2015 10.53 † License Agreement, dated September 30, 2015, by and between XOMA (US) LLCand Novartis Institutes for Biomedical Research, Inc. 10-Q 000-14710 10.2 11/06/2015 10.54 Amended Secured Note Agreement, dated September 30, 2015, by and betweenXOMA (US) LLC and Novartis Institutes for Biomedical Research, Inc. 10-Q 000-14710 10.3 11/06/2015 10.55 † Amendment to Amended and Restated Research, Development andCommercialization Agreement, dated September 30, 2015, by and between XOMA(US) LLC and Novartis Institutes for Biomedical Research, Inc. 10-Q 000-14710 10.4 11/06/2015 10.56 Sales Agreement, dated November 12, 2015, by and between XOMA Corporationand Cowen and Company, LLC 8-K 001-14710 10.1 11/12/2015 10.57 † License Agreement, dated December 1, 2015, by and between XOMA (US) LLCand Novo Nordisk A/S 10-K 001-14710 10.63 03/09/2016 10.58 Settlement and Amended License Agreement dated December 3, 2015, by andbetween XOMA (US) LLC, as a successor-in-interest of XOMA Ireland Limitedand Pfizer Inc. 10-K 001-14710 10.64 03/09/2016 10.59 † Asset Purchase Agreement dated November 5, 2015 by and between the Companyand Agenus West, LLC 10-K 001-14710 10.65 03/09/2016 10.60 + Protective Rights Agreement dated December 21, 2016 by and between XOMA(US) LLC and HealthCare Royalty Partners II, L.P. relating to the Royalty InterestAcquisition Agreement dated December 20, 2016, by and between XOMACorporation and HealthCare Royalty Partners II, L.P. and the Amended andRestated License Agreement, dated effective as of October 27, 2006, betweenXOMA (US) LLC and DYAX, Corp. 10.61 + Protective Rights Agreements dated December 21, 2016 by and between XOMA(US) LLC and HealthCare Royalty Partners II, L.P. relating to the Royalty InterestAcquisition Agreement dated December 20, 2016, by and between XOMACorporation and HealthCare Royalty Partners II, L.P. and the License Agreement,dated effective as of August 18, 2005, between XOMA (US) LLC and WyethPharmaceuticals 10.62 + Royalty Interest Acquisition Agreement dated December 20, 2016, by and betweenXOMA Corporation and HealthCare Royalty Partners II, L.P., relating to theAmended and Restated License Agreement, dated effective as of October 27, 2006,between XOMA (US) LLC and DYAX, Corp. Incorporation By ReferenceExhibit Number Exhibit Description Form SEC File No. Exhibit Filing Date 10.63 + Royalty Interest Acquisition Agreement dated December 20, 2016, by and betweenXOMA Corporation and HealthCare Royalty Partners II, L.P., relating to theLicense Agreement, dated effective as of August 18, 2005, between XOMA (US)LLC and Wyeth Pharmaceuticals 10.64 + Amendment of Section 6.10(a) and (b), dated March 8, 2017, to Royalty InterestAcquisition Agreements dated December 20, 2016, by and between XOMACorporation and HealthCare Royalty Partners II, L.P. 10.65 + Amendment No. 3, effective January 17, 2017, to the Loan Agreement, effectiveDecember 30, 2010, by and among XOMA (US) LLC, Les Laboratoires Servier andInstitut de Recherches Servier 10.66 + Amendment No. 1, dated December 20, 2016, to Loan and Security Agreement,dated February 27, 2015, by and among XOMA Corporation, XOMA(US) LLC andXOMA Commercial as borrowers and Hercules Technology Growth Capital, Inc.,as agent and lender 10.67 Subscription Agreement, dated February 10, 2017, by and among XOMACorporation, Biotechnology Value Fund, L.P., and certain entities affiliated withBVF 424(b)(5) 333-201882 Annex A 02/13/2017 21.1 + Subsidiaries of the Company 23.1 + Consent of Independent Registered Public Accounting Firm 24.1 + Power of Attorney (included on the signature pages hereto) 31.1 + Certification of Chief Executive Officer, as required by Rule 13a-14(a) or Rule 15d-14(a) 31.2 + Certification of Chief Financial Officer, as required by Rule 13a-14(a) or Rule 15d-14(a) 32.1 + Certification of Chief Executive Officer and Chief Financial Officer, as required byRule 13a-14(b) or Rule 15d-14(b) and Section 1350 of Chapter 63 of Title 18 of theUnited States Code (18 U.S.C. §1350) (1) 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 confidentialityrequest. 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 beincorporated by reference into any filing of the Registrant under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, asamended (whether made before or after the date of the Form 10-K), irrespective of any general incorporation language contained in such filing. Exhibit 10.60EXECUTION VERSIONPROTECTIVE RIGHTS AGREEMENTTHIS PROTECTIVE RIGHTS AGREEMENT (this “ Agreement ”) is made and entered into as of December21, 2016 by and between XOMA (US) LLC, a Delaware limited liability company (“ Grantor ”), and HealthCare Royalty PartnersII, L.P., a Delaware limited partnership (“ HC Royalty ”). RECITALS: A. Grantor and HC Royalty are parties to that certain Royalty Interest Acquisition Agreement of evendate herewith. B. The Royalty Interest Acquisition Agreement provides that Grantor has agreed to assign to HCRoyalty, and HC Royalty has agreed to acquire from Grantor, the Assigned Rights (as defined in the Royalty Interest AcquisitionAgreement). C. Grantor has agreed pursuant to the terms of the Royalty Interest Acquisition Agreement to enter intothis Agreement, under which Grantor grants to HC Royalty a security interest in and to the Collateral as security for the dueperformance and payment of all of Grantor’s obligations to HC Royalty under the Royalty Interest Acquisition Agreement. AGREEMENT: NOW, THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are herebyacknowledged, Grantor and HC Royalty, with intent to be legally bound hereby, covenant and agree as follows: SECTION 1. Definitions . For purposes of this Agreement, capitalized terms used herein shall have the meanings set forth below.Capitalized terms used herein and not otherwise defined shall have the meaning given such terms in the UCC or the Royalty InterestAcquisition Agreement, as applicable. “Agreement” has the meaning set forth in the preamble to this Agreement. “Collateral” has the meaning set forth in Section 2 of this Agreement. “Default” means (i) a default under one or more of the Transaction Documents, which default, if reasonablycapable of being cured within 30 days, continues without cure for such period, (ii) a Recharacterization or (iii) an Insolvency Event. “Grantor” has the meaning set forth in the preamble to this Agreement. “HC Royalty” has the meaning set forth in the preamble to this Agreement.- 1 - “Party” means any of Grantor or HC Royalty as the context indicates and “ Parties ” shall mean all of Grantorand HC Royalty. “Royalty Interest Acquisition Agreement” means the Royalty Interest Acquisition Agreement entered into asof the date hereof by and between Grantor, XOMA Corporation and HC Royalty, as the same may be amended, modified orsupplemented in accordance with the terms thereof, relating to that certain Amended and Restated License Agreement, datedeffective as of October 27, 2006, between Grantor (as successor in interest to XOMA Ireland Limited) and DYAX Corp., a Delawarecorporation. “Secured Obligations” means all obligations and liabilities of every nature of Grantor now or hereafter existingunder or arising out of or in connection with the Royalty Interest Acquisition Agreement and each other Transaction Document towhich it is a party, whether for damages, principal, interest, reimbursement of fees, expenses, indemnities or otherwise (includingwithout limitation interest, fees and other amounts that, but for the filing of a petition in bankruptcy with respect to Grantor, wouldaccrue on such obligations, whether or not a claim is allowed against Grantor for such interest, fees and other amounts in the relatedbankruptcy proceeding), whether voluntary or involuntary, direct or indirect, absolute or contingent, liquidated or unliquidated,whether or not jointly owed with others, and whether or not from time to time decreased or extinguished and later increased, createdor incurred, and all or any portion of such obligations or liabilities that are paid, to the extent all or any part of such payment isavoided or recovered directly or indirectly from HC Royalty as a preference, fraudulent transfer or otherwise. “Transfer” means any sale, conveyance, assignment, disposition, pledge, hypothecation or transfer. “UCC” means the Uniform Commercial Code, as in effect on the date of this Agreement in the State of NewYork. SECTION 2. Grant of Security. Grantor hereby grants HC Royalty a security interest in all of its right, title, and interest in, to and under thefollowing property, whether now or hereinafter existing or acquired, whether tangible or intangible and wherever the same may belocated (collectively, the “ Collateral ”): (a) the Assigned Rights, including, without limitation, the Purchased Interest, whether it constitutes anaccount or a payment intangible under the UCC, and whether or not evidenced by an instrument or a general intangible,and the absolute right to payment and receipt of the Purchased Interest under or pursuant to the License Agreements; (b) all books, records and database extracts of Grantor specifically relating to any of the foregoingCollateral; and (c) all Proceeds of or from any and all of the foregoing Collateral, including all payments under anyindemnity, warranty or guaranty, and all money now or at any- 2 - time in the possession or under the control of, or in transit to, HC Royalty, relating to any of the foregoing Collateral. Each item of Collateral listed in this Section 2 that is defined in Article 9 of the UCC shall have the meaning setforth in the UCC, it being the intention of Grantor that the description of the Collateral set forth above be construed to include thebroadest possible range of assets described herein. The Assigned Rights have been sold, assigned, transferred and conveyed to HC Royalty pursuant to the RoyaltyInterest Acquisition Agreement and it is the intention of the Parties that such transaction be treated as a true and absolute sale. Thesecurity interest granted in this Section 2 is granted as a precaution against the possibility, contrary to the Parties’ intentions, that thetransaction be characterized as other than a true and absolute sale. SECTION 3. Security for Obligations . This Agreement secures, and the Collateral is collateral security for, the due and punctual payment orperformance in full (including without limitation the payment of amounts that would become due but for the operation of theautomatic stay under Subsection 362(a) of the United States Bankruptcy Code) of all Secured Obligations. SECTION 4. Grantor to Remain Liable . Anything contained herein to the contrary notwithstanding, (a) Grantor shall remain liable under any contractsand agreements included in the Collateral, to the extent set forth therein, to perform all of its duties and obligations thereunder to thesame extent as if this Agreement had not been executed, (b) the exercise by HC Royalty of any of its rights hereunder shall notrelease Grantor from any of its duties or obligations under any contracts and agreements included in the Collateral, and (c) HCRoyalty shall not have any obligation or liability under any contracts, licenses, and agreements included in the Collateral by reasonof this Agreement, nor shall HC Royalty be obligated (i) to perform any of the obligations or duties of Grantor thereunder, (ii) to takeany action to collect or enforce any claim for payment assigned hereunder, or (iii) to make any inquiry as to the nature or sufficiencyof any payment Grantor may be entitled to receive thereunder. SECTION 5. Representations and Warranties . Grantor represents and warrants as follows: (a) Validity . This Agreement creates a valid security interest in the Collateral securing the payment andperformance in full of the Secured Obligations. Upon the filing of appropriate UCC financing statements in the filing offices listedon Schedule 5(b) , all filings, registrations, recordings and other actions necessary or appropriate to create, preserve, protect andperfect a first priority security interest will have been accomplished and such security interest will be prior to the rights of all otherPersons therein and free and clear of any and all Liens, except any Liens created in favor of HC Royalty pursuant to this Agreementand any other Transaction Document to which HC Royalty is a party. - 3 - (b) Authorization, Approval . No authorization, approval, or other action by, and no notice to or filingwith, any government or agency of any government or other Person is required either (i) for the grant by Grantor of the securityinterest granted hereby or for the execution, delivery and performance of this Agreement by Grantor; or (ii) for the perfection of, andthe first priority of, the grant of the security interest created hereby or the exercise by HC Royalty of its rights and remedieshereunder, other than in the case of clause (ii), the filing of financing statements in the offices listed on Schedule 5(b) . (c) Enforceability . This Agreement is the legally valid and binding obligation of Grantor, enforceableagainst Grantor in accordance with its terms, subject, as to enforcement of remedies, to bankruptcy, insolvency, reorganization,moratorium or similar laws affecting creditors’ rights generally or general equitable principles. (d) Office Locations; Type and Jurisdiction of Organizatio n. The sole place of business, the chiefexecutive office and each office where Grantor keeps its records regarding the Collateral are, as of the date hereof, located at thelocations set forth on Schedule 5(d) ; Grantor’s type of organization (e.g., corporation) and jurisdiction of organization are listed onSchedule 5(d) . (e) Names . Except as set forth on Schedule 5(e) , Grantor (or any predecessor by merger or otherwise)has not, within the five (5) year period preceding the date hereof, had a different name from the name listed for Grantor on thesignature pages hereof. (f) Ownership of Collateral; No Other Filings . Except for the security interest created by thisAgreement and the assignment effected pursuant to the Royalty Interest Acquisition Agreement, Grantor owns the Collateral free andclear of any Lien, except those Liens created in favor of HC Royalty pursuant to any other Transaction Document to which HCRoyalty is a party. Grantor has the power to transfer and grant a lien and security interest in each item of Collateral upon which itpurports to grant a lien or security interest hereunder. Except as such as may have been filed in favor of HC Royalty relating to theTransaction Documents, no effective financing statement or other instrument similar in effect covering all or any part of theCollateral is on file in any filing or recording office. No recordation of Licensee’s licensed rights in the subject patents has beenmade with the United States Patent and Trademark Office. SECTION 6. Further Assurances . Grantor agrees that from time to time, at its expense, Grantor will promptly execute and deliver and will cause tobe executed and delivered all further instruments and documents, and will take all further action, that may be necessary, or that HCRoyalty may reasonably request, in order to perfect and protect any security interest granted or purported to be granted hereby or toenable HC Royalty to exercise and enforce its rights and remedies hereunder with respect to any Collateral. Without limiting thegenerality of the foregoing, Grantor will: (i) deliver such other instruments or notices, in each case, as may be necessary, or as HCRoyalty may reasonably request, in order to perfect and preserve the security interests granted or purported to be granted hereby or toenable HC Royalty to exercise and enforce its rights and remedies hereunder with respect to any Collateral, (ii) appear in and takecommercially reasonable efforts to defend any action or proceeding to which Grantor is a party- 4 - that may affect Grantor’s title to or HC Royalty’s security interest in all or any part of the Collateral, and (iii) use commerciallyreasonable efforts to obtain any necessary consents of third parties to the assignment and perfection of a security interest to HCRoyalty with respect to any Collateral. Grantor hereby authorizes HC Royalty to file one or more financing or continuationstatements, and amendments thereto, relative to all or any part of the Collateral. Grantor agrees to furnish HC Royalty promptly upon reasonable request by HC Royalty, with any informationthat is reasonably requested by HC Royalty in order to complete such financing statements, continuation statements, or amendmentsthereto. SECTION 7. Certain Covenants of Grantor . Grantor shall: (a) not use or permit any Collateral to be used unlawfully or in violation of any provision of theTransaction Documents or any applicable statute, regulation or ordinance or any policy of insurance covering the Collateral; (b) give HC Royalty thirty (30) days’ written notice after any change in Grantor’s name, identity orcorporate structure or reincorporation, reorganization, or taking of any other action that results in a change of the jurisdiction oforganization of Grantor; (c) give HC Royalty thirty (30) days’ written notice after any change in Grantor’s sole place of business,chief executive office or the office where Grantor keeps its records regarding the Collateral or a reincorporation, reorganization orother action that results in a change of the jurisdiction of organization of Grantor; and (d) pay promptly when due all taxes, assessments and governmental charges or levies imposed upon, andall claims against, the Collateral, except to the extent the validity thereof is being diligently contested in good faith and the applicableGrantor maintains reserves appropriate therefor under the generally accepted accounting principles used by Grantor in thepreparation of its financial statements; provided that Grantor shall in any event pay such taxes, assessments, charges, levies or claimsnot later than three (3) Business Days prior to the date of any proposed sale under any judgment, writ or warrant of attachmententered or filed against Grantor or any of the Collateral as a result of the failure to make such payment; provided that the foregoingcovenant shall not apply to any such taxes, assessments and governmental charges or levies imposed upon or claims against HCRoyalty as owner of the Collateral. SECTION 8. Special Covenants With Respect to the Collateral . (a) Grantor shall: (i) diligently keep reasonable records respecting the Collateral and at all times keep at least one(1) complete set of its records, if any, concerning such Collateral at its chief executive office or principal place of business;(ii) not create, incur, assume or cause to exist any Lien on any property included within thedefinition of Collateral except any Liens created in favor of HC Royalty- 5 - pursuant to this Agreement and any other Transaction Document to which HC Royalty is a party; and(iii) not Transfer, or agree to Transfer, any Collateral; provided that Grantor may Transfer oragree to Transfer any Collateral in connection with the merger or consolidation of the Grantor or the assignment of such Grantor’sobligations and rights by operation of law so long as the Person into which the Grantor has been merged or consolidated or whichhas acquired such Collateral of the Grantor has delivered evidence to HC Royalty, in form and substance reasonably satisfactory toHC Royalty, that such Person has assumed all of Grantor’s obligations under the Transaction Documents. (b) Grantor shall, concurrently with the execution and delivery of this Agreement, execute and deliver toHC Royalty one original of a Special Power of Attorney in the form of Exhibit I annexed hereto for execution of an assignment ofthe Collateral to HC Royalty, or the implementation of the sale or other disposition of the Collateral pursuant to HC Royalty’s goodfaith exercise of the rights and remedies granted hereunder; provided , however , HC Royalty agrees that it will not exercise its rightsunder such Special Power of Attorney unless a Default has occurred and is continuing. (c) Grantor further agrees that a breach of any of the covenants contained in this Section 8 (other thanthe covenant contained in Section 8(a)(i)) will cause irreparable injury to HC Royalty, that HC Royalty has no adequate remedy atlaw in respect of such breach and, as a consequence, that each and every covenant contained in this Section 8 shall be specificallyenforceable against Grantor, and Grantor hereby waives and agrees not to assert any defenses against an action for specificperformance of such covenants (other than any such defense based on the assertion that Grantor had performed and is performingsuch covenant(s)). SECTION 9. Standard of Care . The powers conferred on HC Royalty hereunder are solely to protect its interest in the Collateral and shall notimpose any duty upon it to exercise any such powers. Except for the exercise of good faith and of reasonable care in the accountingfor monies actually received by HC Royalty hereunder, HC Royalty shall have no duty as to any Collateral or as to the taking of anynecessary steps to preserve rights against prior parties or any other rights pertaining to any Collateral. HC Royalty shall be deemedto have exercised reasonable care in the custody and preservation of Collateral in its possession if such Collateral is accordedtreatment substantially equal to that which HC Royalty accords its own property. SECTION 10. Remedies Upon Default . (a) If, and only if, any Default shall have occurred and be continuing, HC Royalty may, in good faith,exercise in respect of the Collateral (i) all rights and remedies provided for herein, under the Royalty Interest Acquisition Agreementor otherwise available to it, and (ii) all the rights and remedies of a secured party on default under the Uniform Commercial Code, inall relevant jurisdictions.(b) Anything contained herein to the contrary notwithstanding, upon the occurrence and during thecontinuation of a Default, HC Royalty shall have the right (but not the obligation) to bring suit, in the name of Grantor, HC Royaltyor otherwise, to exercise its rights- 6 - with respect to any Collateral (it being understood that this Section 10(b) shall not supersede Section 6.07 of the Royalty InterestAcquisition Agreement), in which event Grantor shall, at the request of HC Royalty, do any and all lawful acts and execute any andall documents required by HC Royalty in aid of such enforcement. Grantor shall promptly, upon demand, reimburse and indemnifyHC Royalty as provided in Section 12 hereof in connection with the exercise of its rights under this Section 10 . SECTION 11. Application of Proceeds . Except as expressly provided elsewhere in this Agreement, all proceeds received by HC Royalty in respect ofany sale of, collection from, or other realization upon all or any part of the Collateral shall be applied in good faith to satisfy (to theextent of the net proceeds received by HC Royalty) such item or part of the Secured Obligations as HC Royalty may designate. SECTION 12. Expenses. Grantor agrees to pay to HC Royalty upon demand the amount of any and all documented, reasonable out-of-pocket costs and expenses, including the reasonable fees and expenses of not more than one counsel per jurisdiction and of anyexperts and agents, that HC Royalty may reasonably and actually incur in connection with (i) the custody, preservation, use oroperation of, or the sale of, collection from, or other realization upon, any of the Collateral during the continuance of a Default, (ii)the exercise or enforcement of any of the rights of HC Royalty hereunder, or (iii) the failure by Grantor to perform or observe any ofthe provisions hereof, which failure, if reasonably capable of being cured within 30 days, continues without cure for such period;provided that any such costs and expenses in respect of the enforcement of and disputes under the License Agreement shall besubject to Section 6.07 of the Royalty Interest Acquisition Agreement in lieu of this Section 1 2. SECTION 13. Continuing Security Interest . This Agreement shall create a continuing security interest in the Collateral and shall (i) be binding upon Grantorand its respective successors and assigns, and (ii) inure, together with the rights and remedies of HC Royalty hereunder, to thebenefit of HC Royalty and its successors, transferees and assigns. SECTION 14. Amendments . (a) This Agreement or any term or provision hereof may not be amended, changed or modified exceptwith the written consent of the Parties and the approval of such amendment, change or modification by counsel to HC Royalty. Nowaiver of any right hereunder shall be effective unless such waiver is signed in writing by the Party against whom such waiver issought to be enforced.(b) No failure or delay by either Party in exercising any right, power or privilege hereunder shall operateas a waiver thereof nor shall any single or partial exercise thereof preclude any other or further exercise thereof or the exercise of anyother right, power or privilege.- 7 - (c) No waiver or approval hereunder shall, except as may otherwise be stated in such waiver or approval,be applicable to subsequent transactions. No waiver or approval hereunder shall require any similar or dissimilar waiver or approvalthereafter to be granted hereunder. The rights and remedies herein provided shall be cumulative and not exclusive of any rights orremedies provided by applicable law. SECTION 15. Notices . All notices, consents, waivers and other communications hereunder shall be in writing and shall be delivered inaccordance with Section 9.02 of the Royalty Interest Acquisition Agreement. SECTION 16. Severability . If any provision of this Agreement is held to be invalid or unenforceable, the remaining provisions shallnevertheless be given full force and effect. Any provision of this Agreement held invalid or unenforceable only in part or degree bya court of competent jurisdiction shall remain in full force and effect to the extent not held invalid or unenforceable. SECTION 17. Headings and Captions . The headings and captions in this Agreement are for convenience and reference purposes only and shall not beconsidered a part of or affect the construction or interpretation of any provision of this Agreement. SECTION 18. Governing Law; Jurisdiction . (a) This Agreement shall be governed by, and construed, interpreted and enforced in accordance with,the laws of the State of New York, USA without giving effect to the principles of conflicts of law thereof (other than Section 5-1401of the General Obligations Law of the State of New York). Each Party unconditionally and irrevocably consents to the exclusivejurisdiction of the courts of the State of New York, USA located in the County of New York and the Federal district court for theSouthern District of New York located in the County of New York with respect to any suit, action or proceeding arising out of orrelating to this Agreement or the transactions contemplated hereby. Each Party hereby further irrevocably waives any objection,including any objection to the laying of venue or based on the grounds of forum non convenien s, which it may now or hereafterhave to the bringing of any action or proceeding in such jurisdiction in respect of any Transaction Document. (b) Each Party hereby irrevocably consents to the service of process out of any of the courts referred to insubsection (a) above of this Section 18 in any such suit, action or proceeding by the mailing of copies thereof by registered orcertified mail, postage prepaid, to it at its address set forth in this Agreement. Each Party hereby irrevocably waives any objection tosuch service of process and further irrevocably waives and agrees not to plead or claim in any suit, action or proceeding commencedhereunder or under any other Transaction Document that service of process was in any way invalid or ineffective. Nothing hereinshall affect the right of a Party to serve process on the other Party in any other manner permitted by law.- 8 - SECTION 19. Waiver of Jury Trial . EACH PARTY HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BYAPPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, PROCEEDING, CLAIM ORCOUNTERCLAIM ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONSCONTEMPLATED UNDER THIS AGREEMENT (WHETHER BASED ON CONTRACT, TORT OR ANY OTHERTHEORY). THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTSOR MODIFICATIONS TO THIS AGREEMENT. EACH PARTY HERETO (A) CERTIFIES THAT NOREPRESENTATIVE, AGENT OR ATTORNEY OF THE OTHER PARTY HERETO HAS REPRESENTED, EXPRESSLYOR OTHERWISE, THAT THE OTHER PARTY HERETO WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TOENFORCE THE FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTY HERETOHAVE BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUALWAIVERS AND CERTIFICATIONS IN THIS SECTION 1 9. SECTION 20. Counterparts; Effectiveness . This Agreement may be executed in two or more counterparts, each of which shall be an original, but all ofwhich together shall constitute one and the same instrument. This Agreement shall become effective when each Party shall havereceived a counterpart hereof signed by the other Party. Any counterpart may be executed by .pdf signature and such .pdf signatureshall be deemed an original. [SIGNATURE PAGE FOLLOWS] - 9 - IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed by theirrespective authorized officers as of the date first above written. XOMA (US) LLCBy: /s/ James R. NealName: James R. NealTitle: Senior Vice President and Chief Operating Officer HEALTHCARE ROYALTY PARTNERS II, L.P. By: HealthCare Royalty GP II, LLC, its general partnerBy: /s/ Clarke B. FutchName: Clarke B. FutchTitle: Managing Partner SCHEDULE 5(b)TOPROTECTIVE RIGHTS AGREEMENT Filing Offices U C C: Secretary of State of the State of Delaware SCHEDULE 5(d)TOPROTECTIVE RIGHTS AGREEMENT Office Locations, Type and Jurisdiction of Organization Sole Place of Business and Chief Executive Office of Grantor : c/o XOMA Corporation 2910 Seventh StreetBerkeley, CA 94710 Addresses of the Properties at which Grantor Maintains Records Relating to the Collateral : c/o XOMA Corporation 2910 Seventh StreetBerkeley, CA 94710 Jurisdiction of Organization : Delaware Type of Organization : Limited liability company SCHEDULE 5(e)TOPROTECTIVE RIGHTS AGREEMENT Name Changes None. EXHIBIT I TO PROTECTIVE RIGHTS AGREEMENT SPECIAL POWER OF ATTORNEY STATE OF ) )ss.:COUNTY OF ) KNOW ALL MEN BY THESE PRESENTS, that each of XOMA (US) LLC (“ Grantor ”), hereby appointsand constitutes HEALTHCARE ROYALTY PARTNERS II, L .P. (“ HC Royalty ”) and each of its successors and assignees, itstrue and lawful attorney, with full power of substitution and with full power and authority to perform the following acts on behalf ofGrantor upon any default under the Transaction Documents that is continuing (a) to ask for, demand, collect, sue for, recover,compound, receive and give acquittance and receipts for moneys due and to become due under or in respect of any of the Collateral,(b) to receive, endorse and collect any drafts or other instruments, documents and chattel paper constituting Collateral in connectionwith clause (a) above, (c) to file any claims or take any action or institute any proceedings that HC Royalty may in its good faith solediscretion deem necessary or desirable for the collection of any of the Collateral, (d) to pay or discharge taxes or liens levied orplaced upon or threatened against the Collateral, the legality or validity thereof and the amounts necessary to discharge the same tobe determined by HC Royalty in its reasonable commercial judgment, any such payments made by HC Royalty to becomeobligations of Grantor to HC Royalty, due and payable immediately without demand, and (e) to sign and endorse any invoices, draftsagainst debtors, verifications, notices and other documents relating to the Collateral. This Power of Attorney is made pursuant to a Protective Rights Agreement, dated as of December 21, 2016between Grantor and HC Royalty (the “ Protective Rights Agreement ”) relating to the Royalty Interest Acquisition Agreement,entered into as of December 21, 2016, by and between Grantor, XOMA Corporation and HC Royalty and the Amended and RestatedLicense Agreement, dated effective as of October 27, 2006, between Grantor (as successor in interest to XOMA Ireland Limited) andDYAX Corp., a Delaware corporation, and is subject to the terms and provisions of the Protective Rights Agreement. Terms used herein and not otherwise defined herein shall have the meanings given to such terms in the Protective Rights Agreement.This Power of Attorney, being coupled with an interest, is irrevocable until the termination of the Protective Rights Agreement. Date: XOMA (US) LLC By: Name: Title: Exhibit 10.61EXECUTION VERSION PROTECTIVE RIGHTS AGREEMENTTHIS PROTECTIVE RIGHTS AGREEMENT (this “ Agreement ”) is made and entered into as of December21, 2016 by and between XOMA (US) LLC, a Delaware limited liability company (“ Grantor ”), and HealthCare Royalty PartnersII, L.P., a Delaware limited partnership (“ HC Royalty ”). RECITALS: A. Grantor and HC Royalty are parties to that certain Royalty Interest Acquisition Agreement of eve ndate herewith. B. The Royalty Interest Acquisition Agreement provides that Grantor has agreed to assign to HCRoyalty, and HC Royalty has agreed to acquire from Grantor, the Assigned Rights (as defined in the Royalty Interest AcquisitionAgreement). C. Grantor has agreed pursuant to the terms of the Royalty Interest Acquisition Agreement to enter intothis Agreement, under which Grantor grants to HC Royalty a security interest in and to the Collateral as security for the dueperformance and payment of a ll of Grantor’s obligations to HC Royalty under the Royalty Interest Acquisition Agreement. AGREEMENT: NOW, THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are herebyacknowledged, Grantor and HC Royalty, with intent to be legally bound hereby, covenant and agree as follows: SECTION 1. Definitions . For purposes of this Agreement, capitalized terms used herein shall have the meanings set forth below.Capitalized terms used herein and not otherwise defined shall have the meaning given such terms in the UCC or the Royalty InterestAcquisition Agreement, as applicable. “Agreement” has the meaning set forth in the preamble to this Agreement. “Collateral” has the meaning set forth in Section 2 of this Agreement. “Default” means (i) a default under one or more of the Transaction Documents, which default, if reasonablycapable of being cured within 30 days, continues without cure for such period, (ii) a Recharacterization or (iii) an Insolvency Event. “Grantor” has the meaning set forth in the preamble to this Agreement. “HC Royalty” has the meaning set forth in the preamble to this Agreement. - 1 - “Party” means any of Grantor or HC Royalty as the context indicates and “ Parties ” shall mean all of Grantorand HC Royalt y. “Royalty Interest Acquisition Agreement” means the Royalty Interest Acquisition Agreement entered into asof the date hereof by and between Grantor, XOMA Corporation and HC Royalty, as the same may be amended, modified orsupplemented in accordance with the terms thereof, relating to that certain License Agreement, effective as of August 18, 2005,between Grantor (as successor in interest to XOMA Ireland Limited) and Wyeth, a Delaware corporation, or its permitted successorin interest or assignee. “Secured Obligations” means all obligations and liabilities of every nature of Grantor now or hereafterexisting under or arising out of or in connection with the Royalty Interest Acquisition Agreement and each other TransactionDocument to which it is a party, whether for damages, principal, interest, reimbursement of fees, expenses, indemnities or otherwise(including without limitation interest, fees and other amounts that, but for the filing of a petition in bankruptcy with respect toGrantor, would accrue on such obligations, whether or not a claim is allowed against Grantor for such interest, fees and otheramounts in the related bankruptcy proceeding), whether voluntary or involuntary, direct or indirect, absolute or contingent,liquidated or unliquidated, whether or not jointly owed with others, and whether or not from time to time decreased or extinguishedand later increased, created or incurred, and all or any portion of such obligations or liabilities that are paid, to the extent all or anypart of such payment is avoided or recovered directly or indirectly from HC Royalty as a preference, fraudulent transfer orotherwise. “Transfer” means any sale, conveyance, assignment, disposition, pledge, hypothecation or transfer. “UCC” means the Uniform Commercial Code, as in effect on the date of this Agreement in the State of NewYork. SECTION 2. Grant of Security . Grantor hereby grants HC Royalty a security interest in all of its right, title, and interest in, to and under thefollowing property, whether now or hereinafter existing or acquired, whether tangible or intangible and wherever the same may belocated (collectively, the “ Collateral ”): (a) the Assigned Rights, including, without limitation, the Purchased Interest, whether it constitutes anaccount or a payment intangible under the UCC, and whether or not evidenced by an instrument or a general intangible, and theabsolute right to payment and receipt of the Purchased Interest under or pursuant to the License Agreements; (b) all books, records and database extracts of Grantor specifically relating to any of the foregoingCollateral; and (c) all Proceeds of or from any and all of the foregoing Collateral, including all payments under anyindemnity, warranty or guaranty, and all money now or at any time in the possession or under the control of, or in transit to, HCRoyalty, relating to any of the foregoing Collateral. - 2 - Each item of Collateral listed in this Section 2 that is defined in Article 9 of the UCC shall have the meaning setforth in th e UCC, it being the intention of Grantor that the description of the Collateral set forth above be construed to include thebroadest possible range of assets described herein. The Assigned Rights have been sold, assigned, transferred and conveyed to HC Royalty pursuant to the RoyaltyInterest Acquisition Agreement and it is the intention of the Parties that such transaction be treated as a true and absolute sale. Thesecurity interest granted in this Section 2 is granted as a precaution against the possibility, contrary to the Parties’ intentions, thatthe transaction be characterized as other than a true and absolute sale. SECTION 3. Security for Obligations . This Agreement secures, and the Collateral is collateral security for, the due and punctual payment orperformance in full (including without limitation the payment of amounts that would become due but for the operation of theautomatic stay under Subsection 362(a) of the United States Bankruptcy Code) of all Secured Obligations. SECTION 4. Grantor to Remain Liable . Anything contained herein to the contrary notwithstanding, (a) Grantor shall remain liable under any contractsand agreements included in the Collateral, to the extent set forth therein, to perform all of its duties and obligations thereunder tothe same extent as if this Agreement had not been executed, (b) the exercise by HC Royalty of any of its rights hereunder shall notrelease Grantor from any of its duties or obligations under any contracts and agreements included in the Collateral, and (c) HCRoyalty shall not have any obligation or liability under any contracts, licenses, and agreements included in the Collateral by reasonof this Agreement, nor shall HC Royalty be obligated (i) to perform any of the obligations or duties of Grantor thereunder, (ii) totake any action to collect or enforce any claim for payment assigned hereunder, or (iii) to make any inquiry as to the nature orsufficiency of any payment Grantor may be entitled to receive thereunder. SECTION 5. Representations and Warranties . Grantor represents and warrants as follows: (a) Validity . This Agreement creates a valid security interest in the Collateral securing the payment andperformance in full of the Secured Obligations. Upon the filing of appropriate UCC financing statements in the filing offices listedon Schedule 5(b) , all filings, registrations, recordings and other actions necessary or appropriate to create, preserve, protect andperfect a first priority security interest will have been accomplished and such security interest will be prior to the rights of all otherPersons therein and free and clear of any and all Liens, except any Liens created in favor of HC Royalty pursuant to this Agreementand any other Transaction Document to which HC Royalty is a party.(b) Authorization, Approval . No authorization, approval, or other action by, and no notice to or filingwith, any government or agency of any government or other Person is required either (i) for the grant by Grantor of the securityinterest granted hereby or for the execution, delivery and performance of this Agreement by Grantor; or (ii) for the perfection of, andthe first priority of, the grant of the security interest created hereby or the exercise by HC- 3 - Royalty of its rights and remedies hereunder, other than in the case of clause (ii), the filing of financing statements in the officeslisted on Schedule 5(b) . (c) Enforceability . This Agreement is the legally valid and binding obligation of Grantor, enforceableagainst Grantor in accordance with its terms, subject, as to enforcement of remedies, to bankruptcy, insolvency, reorganization,moratorium or similar laws affecting creditors’ rights generally or general equitable principles. (d) Office Locations; Type and Jurisdiction of Organizatio n. The sole place of business, the chiefexecutive office and each office where Grantor keeps its records regarding the Collateral are, as of the date hereof, located at thelocations set forth on Schedule 5(d) ; Grantor’s type of organization (e.g., corporation) and jurisdiction of organization are listed onSchedule 5(d) . (e) Names . Except as set forth on Schedule 5(e) , Grantor (or any predecessor by merger or otherwise)has not, within the five (5) year period preceding the date hereof, had a different name from the name listed for Grantor on thesignature pages hereof. (f) Ownership of Collateral; No Other Filings . Except for the security interest created by thisAgreement and the assignment effected pursuant to the Royalty Interest Acquisition Agreement, Grantor owns the Collateral free andclear of any Lien, except those Liens created in favor of HC Royalty pursuant to any other Transaction Document to which HCRoyalty is a party. Grantor has the power to transfer and grant a lien and security interest in each item of Collateral upon which itpurports to grant a lien or security interest hereunder. Except as such as may have been filed in favor of HC Royalty relating to theTransaction Documents, no effective financing statement or other instrument similar in effect covering all or any part of theCollateral is on file in any filing or recording office. No recordation of Licensee’s licensed rights in the subject patents has beenmade with the United States Patent and Trademark Office. SECTION 6. Further Assurances . Grantor agrees that from time to time, at its expense, Grantor will promptly execute and deliver and will causeto be executed and delivered all further instruments and documents, and will take all further action, that may be necessary, or thatHC Royalty may reasonably request, in order to perfect and protect any security interest granted or purported to be granted herebyor to enable HC Royalty to exercise and enforce its rights and remedies hereunder with respect to any Collateral. Without limitingthe generality of the foregoing, Grantor will: (i) deliver such other instruments or notices, in each case, as may be necessary, or asHC Royalty may reasonably request, in order to perfect and preserve the security interests granted or purported to be granted herebyor to enable HC Royalty to exercise and enforce its rights and remedies hereunder with respect to any Collateral, (ii) appear in andtake - 4 - commercially reasonable efforts to defend any action or proceeding to which Grantor is a party that may affect Grantor’s title to orHC Royalty’s security interest in all or any part of the Collateral, and (iii) use commercially reasonable efforts to obtain anynecessary consents of third parties to the assignment and perfection of a security interest to HC Royalty with respect to anyCollateral. Grantor hereby authorizes HC Royalty to file one or more financing or continuation statements, and amendmentsthereto, relative to all or any part of th e Collateral. Grantor agrees to furnish HC Royalty promptly upon reasonable request by HC Royalty, with any informationthat is reasonably requested by HC Royalty in order to complete such financing statements, continuation statements, or amendmentsthereto. SECTION 7. Certain Covenants of Grantor . Grantor shall: (a) not use or permit any Collateral to be used unlawfully or in violation of any provision of theTransaction Documents or any applicable statute, regulation or ordinance or any policy of insurance covering the Collateral; (b) give HC Royalty thirty (30) days’ written notice after any change in Grantor’s name, identity orcorporate structure or reincorporation, reorganization, or taking of any other action that results in a change of the jurisdiction oforganization of Grantor; (c) give HC Royalty thirty (30) days’ written notice after any change in Grantor’s sole place of business,chief executive office or the office where Grantor keeps its records regarding the Collateral or a reincorporation, reorganization orother action that results in a change of the jurisdiction of organization of Grantor; and (d) pay promptly when due all taxes, assessments and governmental charges or levies imposed upon,and all claims against, the Collateral, except to the extent the validity thereof is being diligently contested in good faith and theapplicable Grantor maintains reserves appropriate therefor under the generally accepted accounting principles used by Grantor in thepreparation of its financial statements; provided that Grantor shall in any event pay such taxes, assessments, charges, levies or claimsnot later than three (3) Business Days prior to the date of any proposed sale under any judgment, writ or warrant of attachmententered or filed against Grantor or any of the Collateral as a result of the failure to make such payment; provided that the foregoingcovenant shall not apply to any such taxes, assessments and governmental charges or levies imposed upon or claims against HCRoyalty as owner of the Collateral. SECTION 8. Special Covenants With Respect to the Collateral . (a) Grantor shall: (i) diligently keep reasonable records respecting the Collateral and at all times keep at leastone (1) complete set of its records, if any, concerning such Collateral at its chief executive office or principal place of business;(ii) not create, incur, assume or cause to exist any Lien on any property included within thedefinition of Collateral except any Liens created in favor of HC Royalty pursuant to this Agreement and any other TransactionDocument to which HC Royalty is a party; and- 5 - (iii) not Transfer, or agree to Transfer, any Collateral; provided that Grantor may Transfer oragree to Transfer any Collateral in connection with the merger or consolidation of the Grantor or the assignment of such Grantor’sobligations and rights by operation of law so long as the Person into which the Grantor has been merged or consolidated or whichhas acquired such Collateral of the Grantor has delivered evidence to HC Royalty, in form and substance reasonably satisfactory toHC Royalty, that such Person has assumed all of Grantor’s obligations under the Transaction Documents. (b) Grantor shall, concurrently with the execution and delivery of this Agreement, execute and deliver toHC Royalty one original of a Special Power of Attorney in the form of Exhibit I annexed hereto for execution of an assignment ofthe Collateral to HC Royalty, or the implementation of the sale or other disposition of the Collateral pursuant to HC Royalty’s goodfaith exercise of the rights and remedies granted hereunder; provided , however , HC Royalty agrees that it will not exercise its rightsunder such Special Power of Attorney unless a Default has occurred and is continuing. (c) Grantor further agrees that a breach of any of the covenants contained in this Section 8 (other thanthe covenant contained in Section 8(a)(i)) will cause irreparable injury to HC Royalty, that HC Royalty has no adequate remedy atlaw in respect of such breach and, as a consequence, that each and every covenant contained in this Section 8 shall be specificallyenforceable against Grantor, and Grantor hereby waives and agrees not to assert any defenses against an action for specificperformance of such covenants (other than any such defense based on the assertion that Grantor had performed and is performingsuch covenant(s)). SECTION 9. Standard of Care . The powers conferred on HC Royalty hereunder are solely to protect its interest in the Collateral and shall notimpose any duty upon it to exercise any such powers. Except for the exercise of good faith and of reasonable care in the accountingfor monies actually received by HC Royalty hereunder, HC Royalty shall have no duty as to any Collateral or as to the taking ofany necessary steps to preserve rights against prior parties or any other rights pertaining to any Collateral. HC Royalty shall bedeemed to have exercised reasonable care in the custody and preservation of Collateral in its possession if such Collateral isaccorded treatment substantially equal to that which HC Royalty accords its own property. SECTION 10. Remedies Upon Default . (a) If, and only if, any Default shall have occurred and be continuing, HC Royalty may, in good faith,exercise in respect of the Collateral (i) all rights and remedies provided for herein, under the Royalty Interest Acquisition Agreementor otherwise available to it, and (ii) all the rights and remedies of a secured party on default under the Uniform Commercial Code, inall relevant jurisdictions.(b) Anything contained herein to the contrary notwithstanding, upon the occurrence and during thecontinuation of a Default, HC Royalty shall have the right (but not the obligation) to bring suit, in the name of Grantor, HC Royaltyor otherwise, to exercise its rights with respect to any Collateral (it being understood that this Section 10(b) shall not supersedeSection 6.07 of the Royalty Interest Acquisition Agreement), in which event Grantor shall, at the request of HC Royalty, do any andall lawful acts and execute any and all documents required by- 6 - HC Royalty in aid of such enforcement. Grantor shall promptly, upon demand, reimburse and indemn ify HC Royalty as provided inSection 12 hereof in connection with the exercise of its rights under this Section 10 . SECTION 11. Application of Proceeds . Except as expressly provided elsewhere in this Agreement, all proceeds received by HC Royalty in respect ofany sale of, collection from, or other realization upon all or any part of the Collateral shall be applied in good faith to satisfy (to theextent of the net proceeds received by HC Royalty) such item or part of the Secured Obligations as HC Royalty may designate. SECTION 12. Expenses . Grantor agrees to pay to HC Royalty upon demand the amount of any and all documented, reasonable out-of-pocket costs and expenses, including the reasonable fees and expenses of not more than one counsel per jurisdiction and of anyexperts and agents, that HC Royalty may reasonably and actually incur in connection with (i) the custody, preservation, use oroperation of, or the sale of, collection from, or other realization upon, any of the Collateral during the continuance of a Default, (ii)the exercise or enforcement of any of the rights of HC Royalty hereunder, or (iii) the failure by Grantor to perform or observe anyof the provisions hereof, which failure, if reasonably capable of being cured within 30 days, continues without cure for such period;provided that any such costs and expenses in respect of the enforcement of and disputes under the License Agreement shall besubject to Section 6.07 of the Royalty Interest Acquisition Agreement in lieu of this Section 1 2. SECTION 13. Continuing Security Interest . This Agreement shall create a continuing security interest in the Collateral and shall (i) be binding uponGrantor and its respective successors and assigns, and (ii) inure, together with the rights and remedies of HC Royalty hereunder, tothe benefit of HC Royalty and its successors, transferees and assigns. SECTION 14. Amendments . (a) This Agreement or any term or provision hereof may not be amended, changed or modified exceptwith the written consent of the Parties and the approval of such amendment, change or modification by counsel to HC Royalty. Nowaiver of any right hereunder shall be effective unless such waiver is signed in writing by the Party against whom such waiver issought to be enforced.(b) No failure or delay by either Party in exercising any right, power or privilege hereunder shall operateas a waiver thereof nor shall any single or partial exercise thereof preclude any other or further exercise thereof or the exercise of anyother right, power or privilege. (c) No waiver or approval hereunder shall, except as may otherwise be stated in such waiver orapproval, be applicable to subsequent transactions. No waiver or approval hereunder shall require any similar or dissimilar waiver orapproval thereafter to be granted hereunder. The rights and remedies herein provided shall be cumulative and not exclusive of anyrights or remedies provided by applicable law. - 7 - SECTION 15. Notices . All notices, consents, waivers and other communications hereunder shall be in writing and shall be delivered inaccordance with Section 9.02 of the Royalty Interest Acquisition Agreement. SECTION 16. Severability . If any provision of this Agreement is held to be invalid or unenforceable, the remaining provisions shallnevertheless be given full force and effect. Any provision of this Agreement held invalid or unenforceable only in part or degree bya court of competent jurisdiction shall remain in full force and effect to the extent not held invalid or unenforceable. SECTION 17. Headings and Captions . The headings and captions in this Agreement are for convenience and reference purposes only and shall not beconsidered a part of or affect the construction or interpretation of any provision of this Agreement. SECTION 18. Governing Law; Jurisdiction . (a) This Agreement shall be governed by, and construed, interpreted and enforced in accordance with,the laws of the State of New York, USA without giving effect to the principles of conflicts of law thereof (other than Section 5-1401of the General Obligations Law of the State of New York). Each Party unconditionally and irrevocably consents to the exclusivejurisdiction of the courts of the State of New York, USA located in the County of New York and the Federal district court for theSouthern District of New York located in the County of New York with respect to any suit, action or proceeding arising out of orrelating to this Agreement or the transactions contemplated hereby. Each Party hereby further irrevocably waives any objection,including any objection to the laying of venue or based on the grounds of forum non convenien s, which it may now or hereafterhave to the bringing of any action or proceeding in such jurisdiction in respect of any Transaction Document. (b) Each Party hereby irrevocably consents to the service of process out of any of the courts referred toin subsection (a) above of this Section 18 in any such suit, action or proceeding by the mailing of copies thereof by registered orcertified mail, postage prepaid, to it at its address set forth in this Agreement. Each Party hereby irrevocably waives any objectiontosuch service of process and further irrevocably waives and agrees not to plead or claim in any suit, action or proceeding commencedhereunder or under any other Transaction Document that service of process was in any way invalid or ineffective. Nothing hereinshall affect the right of a Party to serve process on the other Party in any other manner permitted by law. SECTION 19. Waiver of Jury Trial . EACH PARTY HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BYAPPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, PROCEEDING, CLAIM ORCOUNTERCLAIM ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONSCONTEMPLATED UNDER THIS AGREEMENT (WHETHER BASED ON CONTRACT, TORT OR ANY OTHERTHEORY). THIS WAIVER SHALL APPLY TO ANY- 8 - SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT. EACH PARTY HERETO (A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF THE OTHERPARTY HERETO HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT THE OTHER PARTY HERETOWOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTY HERETO HAVE BEEN INDUCED TO ENTER INTO THISAGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THISSECTION 1 9. SECTION 20. Counterparts; Effectiveness . This Agreement may be executed in two or more counterparts, each of which shall be an original, but all ofwhich together shall constitute one and the same instrument. This Agreement shall become effective when each Party shall havereceived a counterpart hereof signed by the other Party. Any counterpart may be executed by .pdf signature and such .pdf signatureshall be deemed an original. [SIGNATURE PAGE FOLLOWS] - 9 - IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed by their respective authorizedofficers as of the date first above written. XOMA (US) LLCBy: /s/James R. NealName: James R. NealTitle: Senior Vice President and Chief Operati ng Officer [Signature Page to Protective Rights Agreement (Wyeth/Pfizer)] HEALTHCARE ROYALTY PARTNERS II, L.P.By: HEALTHCARE ROYALTY GP II, LLC, its general partnerBy: /s/ Clarke B. FutchName: Clarke B FutchTitle: Managing Partner [Signature Page to Protective Rights Agreement (Wyeth/Pfizer)] SCHEDULE 5(b) TOPROTECTIVE RIGHTS AGREEMENT Filing Offices U C C : Secretary of State of the State of Delaware SCHEDULE 5(d) TOPROTECTIVE RIGHTS AGREEMENT Office Locations, Type and Jurisdiction of Organization Sole Place of Business and Chief Executive Office of Grantor : c/o XOMA Corporation 2910 SeventhStreetBerkeley, CA 94710 Addresses of the Properties at which Grantor Maintains Records Relating to the Collateral : c/o XOMA Corporation 2910 SeventhStreetBerkeley, CA 94710 Jurisdiction of Organization : Delaware Type of Organization : Limited liability company SCHEDULE 5(e) TOPROTECTIVE RIGHTS AGREEMENT Name Changes None. EXHIBIT I TO PROTECTIVE RIGHTS AGREEMENT SPECIAL POWER OF ATTORNEY STATE OF ______________________COUNTY OF ___________________ KNOW ALL MEN BY THESE PRESENTS, that each of XOMA (US) LLC(“ Grantor ”), hereby appoints and constitutes HEALTHCARE ROYALTY PARTNERS II,L.P. (“ HC Royalty ”) and each of its successors and assignees, its true and lawful attorney, with full power ofsubstitution and with full power and authority to perform the following acts on behalf of Grantor upon any default under theTransaction Documents that is continuing (a) to ask for, demand, collect, sue for, recover, compound, receive and give acquittanceand receipts for moneys due and to become due under or in respect of any of the Collateral, (b) to receive, endorse and collect anydrafts or other instruments, documents and chattel paper constituting Collateral in connection with clause (a) above, (c) to file anyclaims or take any action or institute any proceedings that HC Royalty may in its good faith sole discretion deem necessary ordesirable for the collection of any of the Collateral, (d) to pay or discharge taxes or liens levied or placed upon or threatened againstthe Collateral, the legality or validity thereof and the amounts necessary to discharge the same to be determined by HC Royalty inits reasonable commercial judgment, any such payments made by HC Royalty to become obligations of Grantor to HC Royalty, dueand payable immediately without demand, and (e) to sign and endorse any invoices, drafts against debtors, verifications, notices andother documents relating to the Collateral. This Power of Attorney is made pursuant to a Protective Rights Agreement, dated as of December 21, 2016between Grantor and HC Royalty (the “ Protective Rights Agreement ”) relating to the Royalty Interest Acquisition Agreement,entered into as of December 21, 2016, by and between Grantor, XOMA Corporation and HC Royalty and the License Agreement,effective as of August 18, 2005, between Grantor (as successor in interest to XOMA Ireland Limited) and Wyeth, a Delawarecorporation, or its permitted successor in interest or assignee, and is subject to the terms and provisions of the Protective RightsAgreement. Terms used herein and not otherwise defined herein shall have the meanings given to such terms in the ProtectiveRights Agreement. This Power of Attorney, being coupled with an interest, is irrevocable until the termination of the ProtectiveRights Agreement. Date: ____________XOMA (US) LLCBy:Name:Title: [Signature Page to Special Power of Attorney (Wyeth/Pfizer)]Exhibit 10.62 EXECUTION VERSION ROYALTY INTEREST ACQUISITION AGREEMENT Dated as of December 20, 2016 between XOMA Corporation and XOMA (US) LLC and HealthCare Royalty Partners II, L.P. TABLE OF CONTENTS Page ARTICLE I DEFINITIOS Page ARTICLE I DEFINITIONS Section 1.01 Definitions 5Section 1.02 Currency 11 ARTICLE II SALE AND ASSIGNMENT Section 2.01 Sale and Assignment 11Section 2.02 Purchased Interest Payments 12Section 2.03 Payments at Closing 12Section 2.04 No Assumption. 12Section 2.05 Excluded Assets 13Section 2.06 Non-Assignable Rights 13 ARTICLE III REPRESENTATIONS AND WARRANTIES OF SELLER Section 3.01 Organization. 13Section 3.02 Authorizations; Enforceability 13Section 3.03 Litigation. 13Section 3.04 Compliance with Laws 14Section 3.05 Conflicts; Consents 14Section 3.06 Ownership 14Section 3.07 Subordination 14Section 3.08 License Agreement 15Section 3.09 Broker’s Fees 16Section 3.10 Solvency; No Material Adverse Effect 16Section 3.11 Intellectual Property Matters 16Section 3.12 Exploitation. 17Section 3.13 Taxes. 17Section 3.14 No Set-Offs; No Material Liabilities 17Section 3.15 TGF-beta License Agreement 17 ARTICLE IV REPRESENTATIONS AND WARRANTIES OF XOMA Section 4.01 Organization. 18Section 4.02 Authorizations; Enforceability 18Section 4.03 Conflicts; Consents 18Section 4.04 Broker’s Fees 19Section 4.05 Intellectual Property Matters 19Section 4.06 Taxes. 19Section 4.07 Material Inducement 19 ARTICLE V REPRESENTATIONS AND WARRANTIES OF BUYER Section 5.01 Organization. 20Section 5.02 Authorization. 20Section 5.03 Broker’s Fees 20Section 5.04 Conflicts 20 ARTICLE VI COVENANTS Section 6.01 Consents and Waivers 21Section 6.02 Compliance 21Section 6.03 Confidentiality; Public Announcement 21Section 6.04 Protective Rights Agreement 23Section 6.05 Further Assurances 23Section 6.06 Notice by Seller 23Section 6.07 Enforcement of and Disputes Under License Agreement 24Section 6.08 Negative Covenants 25Section 6.09 Future Agreements 25Section 6.10 Reports; Records; Access 25Section 6.11 Remittance to Deposit Account; Set-Offs 26Section 6.12 Certain Payments; Option. 26 ARTICLE VII THE CLOSING; CONDITIONS TO CLOSING Section 7.01 Closing 27Section 7.02 Conditions Applicable to Buyer 27Section 7.03 Conditions Applicable to Seller 28 ARTICLE VIII TERMINATION Section 8.01 Termination. 28Section 8.02 Effects of Expiration or Termination. 29 ARTICLE IX MISCELLANEOUS Section 9.01 Survival 29Section 9.02 Notices 29Section 9.03 Successors and Assigns 30Section 9.04 Indemnification. 31Section 9.05 Independent Nature of Relationship; Taxes 32Section 9.06 Entire Agreement 33Section 9.07 Amendments; No Waivers 33Section 9.08 Interpretation. 34Section 9.09 Headings and Captions 34Section 9.10 Counterparts; Effectiveness 34Section 9.11 Severability 34Section 9.12 Expenses 34Section 9.13 Governing Law; Jurisdiction. 34Section 9.14 Waiver of Jury Trial 35 EXHIBITS Exhibit A––Form of AssignmentExhibit B––Form of ConsentExhibit C––Form of Escrow AgreementExhibit D–Form of Protective RightsAgreementExhibit E–Form of Opinion of Counsel This ROYALTY INTEREST ACQUISITION AGREEMENT (this “ Agreement ”) is made and entered into as of December20, 2016 by and between XOMA Corporation, a corporation organized under the laws of the State of Delaware (“ XOMA ”) and XOMA(US) LLC, a limited liability company organized under the laws of the State of Delaware (“ Seller ”), and HealthCare Royalty Partners II,L.P., a limited partnership organized under the laws of the State of Delaware (“ Buyer ”). RECITALS WHEREAS , Seller (as successor in interest to XOMA Ireland Limited) and DYAX Corp., a Delaware corporation (the “Licensee ”), have entered into that certain Amended and Restated License Agreement, dated effective as of October 27, 2006, a true,correct and complete copy of which, together with all amendments, modifications and supplements thereto, has been previously providedto Buyer (the “ License Agreement ”); WHEREAS , pursuant to the License Agreement, subject to the terms and conditions set forth therein, Seller is entitled toreceive License Payments; and WHEREAS , Seller wishes to sell, assign, convey and transfer to Buyer, and Buyer wishes to accept the sale, assignment,conveyance, and transfer from Seller of, the Assigned Rights pursuant to the License Agreement; NOW, THEREFORE, in consideration of the mutual covenants, agreements representations and warranties set forth herein, theParties agree as follows: Article I DEFINITIONSSection 1.01 Definitions. The following terms, as used herein, shall have the following meanings: “ Affiliate ” shall mean, with respect to any Person, any other Person that controls, is controlled by, or is under common controlwith such Person, but only for so long as such control exists. As used in this definition, “ control ” and “ controls ” mean (i) ownership of50% or more of the voting interests of such entity or (ii) the power to direct or cause the direction of the general management or actions ofsuch entity. “ Agreement ” shall have the meaning given in the preamble hereto. “ Assigned Rights ” shall mean (i) the Purchased Interest and the absolute right to payment and receipt thereof under or pursuantto the License Agreement, (ii) any rights of Seller under the License Agreement to receive reports, worksheets, notices and other associatedinformation, whether related to the Purchased Interest, net sales of any Product or other matters, ,(iii) any rights of Seller under the LicenseAgreement to request inspection of or to audit records and accounts available in accordance with the License Agreement, whether relatedto the Purchased Interest, the License Payments, net sales of any Product or other matters, and (iv) the right to enforce all rights of Sellerunder the License Agreement with respect to the License Payments (including with respect to any development, commercialization orsimilar obligations of the Licensee). “ Assignment ” shall mean the Assignment pursuant to which Seller shall assign, convey and transfer to Buyer Seller’s rightsand interests in and to the Assigned Rights, which Assignment shall be substantially in the form of Exhibit A . 5 “ Bankruptcy Law ” shall mean Title 11 of the United States Code entitled “Bankruptcy” and all other liquidation,conservatorship, bankruptcy, assignment for the benefit of creditors, moratorium, rearrangement, receivership, insolvency, reorganization,or similar debtor relief laws of the United States or other applicable jurisdictions (domestic or foreign) from time to time in effect andaffecting the rights of creditors generally. “ Business Day ” shall mean any day other than a Saturday, a Sunday, any day which is a legal holiday under the laws of theState of New York, or any day on which banking institutions located in the State of New York are required by law or other governmentalaction to close. “ Buyer ” shall have the meaning given in the preamble hereto. “ Buyer Indemnified Party ” shall mean each of Buyer and its Affiliates and any of their respective partners, directors, managers,members, officers, employees and agents. “ Capital Stock ” of any Person shall mean any and all shares, interests, ownership interest units, rights to purchase, warrants,options, participations or other equivalents of or interests in (however designated) equity of such Person, including any preferred stock, butexcluding any debt securities convertible into, or exchangeable for, such equity. “ Claim ” shall mean any claim, demand, action or proceeding (including any investigation by any Governmental Authority). “ Closing ” shall mean the closing of the transactions contemplated under this Agreement in accordance with Section 7.0 1. “ Closing Advance Amount ” shall mean $3,500,000. “ Closing Escrow Amount ” shall mean $8,000,000. “ Closing Date ” shall mean the date all of the conditions set forth in ARTICLE VII are fulfilled or waived in writing by theapplicable Party, as set forth in such ARTICLE VII . “ Collateral ” shall mean the Collateral (as defined in the Protective Rights Agreement). “ Confidential Information ” of any Disclosing Party shall mean any and all information, whether communicated orally, by emailor in any physical form, including without limitation, financial and all other information furnished by or on behalf of the Disclosing Partyto the Receiving Party, together with such portions of analyses, compilations, studies, or other documents, prepared by or for the ReceivingParty and its Representatives, which contain or are derived from information provided by Disclosing Party. Without limiting the foregoing,information shall be deemed to be provided by Disclosing Party to the extent it is learned or derived by Receiving Party or ReceivingParty’s Representatives (a) from any inspection, examination or other review of books, records, contracts, other documentation oroperations of Disclosing Party, (b) from communications with authorized Representatives of Disclosing Party or (c) created, developed,gathered, prepared or otherwise derived by Receiving Party while in discussions with Disclosing Party. However, Confidential Informationdoes not include any information which Receiving Party can demonstrate (i) is or becomes part of the public domain through no fault ofReceiving Party or its Representatives, (ii) was known by Receiving Party on a non-confidential basis prior to disclosure, or(iii) was independently developed by Persons who were not given access to the Confidential Information disclosed to Receiving Partyby Disclosing Party. For clarity, Confidential Information includes any disclosures and information with respect to the Assigned Rightsmade by the Licensee pursuant to the License Agreement and provided to Buyer pursuant to this Agreement. 6 “ Confidentiality Agreement ” shall mean that certain Confidentiality Agreement by and between XOMA and HealthCareRoyalty Management, LLC dated as of November 3, 2016. “ Consent ” shall mean the written consent of the Licensee to the assignment pursuant hereto of the Assigned Rights andagreement to the other matters set forth therein in the form attached as Exhibit B , with only such modifications thereto as are reasonablyacceptable to Buyer. “ Damages ” shall mean any loss, assessment, award, claim, charge, cost, expense (including cost and expenses of investigationand reasonable legal fees and expenses of attorneys), fines, judgments, liability, obligation, penalty or set-off. “ Deposit Account ” shall mean an account established, controlled and maintained by Buyer as the account into which allLicense Payments that are or become payable shall be deposited by the Licensee. As of the Closing Date, the “Deposit Account” shall be: Bank Name: Silicon Valley BankBank Address: 3003 Tasman Drive, Santa Clara, CA ABA #: 121-140-399Account #: 3301301694Account Name: HealthCare Royalty Partners II, L.P.Reference: XOMA “ Disclosing Party ” shall mean, with respect to any Confidential Information, the Party disclosing the Confidential Informationto another Party. “ Dispute ” shall mean any opposition, interference proceeding, reexamination proceeding, cancellation proceeding, re-issueproceeding, invalidation proceeding, inter parties review proceeding, injunction, claim, lawsuit, proceeding, hearing, investigation,complaint, arbitration, mediation, demand, investigation, decree, or any other dispute, disagreement, or claim. “ Economic Commencement Date ” shall mean January 1, 2017. “ Escrow Account ” shall mean the account specified as the “Escrow Account” in the Escrow Agreement. “ Escrow Agreement ” shall mean the Escrow Agreement pursuant to which the Closing Amount shall be deposited into theEscrow Account and released to Seller upon receipt of the Consent or to Buyer in the other circumstances described therein, in each casesubject to the terms and conditions set forth therein, substantially in the form of Exhibit C . “ Excluded Liabilities and Obligations ” shall mean each liability or obligation of Seller or any of its Affiliates of whatevernature, whether presently in existence or arising or asserted hereafter, whether known or unknown, and whether under the LicenseAgreement or any other Transaction Document or otherwise. 7 “ Exploit ” shall mean, with respect to any Product or product candidate, the manufacture, use (including development andtesting), sale, offer for sale (including marketing and promotion), importation, distribution or other commercialization; and “ Exploitatio n”shall have the correlative meaning. “ Fiscal Quarter ” shall mean a calendar quarter. “ Full Purchase Price ” shall mean $11,500,000. “ Governmental Authority ” shall mean any government, court, regulatory or administrative agency or commission, or othergovernmental authority, agency or instrumentality, whether foreign, federal, state or local, or any other government authority in anycountry. “ Indemnified Expenses ” shall mean collectively, all Losses with respect to which Seller is obligated to indemnify any partypursuant to Section 9.04(a) or XOMA is obligated to indemnify any party pursuant to Section 9.04(b) . “ Insolvency Event ” shall mean the occurrence of any of the following with respect to any XOMA Entity: (a) an involuntary proceeding shall be commenced or an involuntary petition shall be filed ina court of competent jurisdiction seeking (i) relief in respect of such XOMA Entity or any Subsidiary, or of a substantial part ofthe property of such XOMA Entity or any Subsidiary, under any Bankruptcy Law now or hereafter in effect, (ii) the appointmentof a receiver, trustee, custodian, sequestrator, conservator or similar official for such XOMA Entity or any Subsidiary or for asubstantial part of the property of such XOMA Entity or any Subsidiary, (iii) the winding- up or liquidation of such XOMAEntity or any Subsidiary, which proceeding or petition shall continue undismissed for 90 calendar days or (iv) an order of a courtof competent jurisdiction approving or ordering any of the foregoing shall be entered; or (b) such XOMA Entity shall (i) voluntarily commence any proceeding or file any petitionseeking relief under any Bankruptcy Law now or hereafter in effect, (ii) apply for the appointment of a receiver, trustee,custodian, sequestrator, conservator or similar official for such XOMA Entity or for a substantial part of the property of suchXOMA Entity, (iii) fail to contest in a timely and appropriate manner any proceeding or the filing of any petition described inclause (a) of this definition, (iv) file an answer admitting the material allegations of a petition filed against it in any proceedingdescribed in clause (a) of this definition, (v) make a general assignment for the benefit of creditors or (vi) wind up or liquidate(except as permitted under this Agreement); or (c) such XOMA Entity shall take any action in furtherance of or for the purpose of effectingthe foregoing; or (d) such XOMA Entity shall admit in writing its inability, or fail generally, to pay its debtsas they become due. “ Intellectual Property ” shall mean patents, patent applications, copyrights, trademarks, trade secrets, and any legally protectableinformation, including computer software, technical information, non- patentable inventions, developments, discoveries, know-how,methods, techniques, formulae, algorithms, data, processes and other proprietary ideas (whether or not patentable or copyrightable) andbiological materials, including, without limitation, vectors, antibodies and cells. “ Knowledge ” shall mean, with respect to any XOMA Entity and any particular matter, the actual knowledge, after due inquiry,of Senior Management relating to such particular matter. 8 “ Licensee ” shall have the meaning given in the Recitals hereto. “ License Agreement ” shall have the meaning given in the Recitals hereto. “ License Payments ” shall mean (a) all amounts paid or payable to Seller under, arising out of or otherwise related to theLicense Agreement, whether in respect of or based on net sales of products, upon achievement of regulatory, clinical or other milestones orevents, as annual or other maintenance fees or otherwise pursuant to the License Agreement, in each case from and after the EconomicCommencement Date, plus (b) all Other Payments, but excluding (c) Reimbursement Payments. “ License Termination ” shall mean the date on which the last to expire of Buyer’s rights to receive any License Payment inrespect of the License Agreement expires in accordance with the terms of the License Agreement. “ Liens ” shall mean any lien, hypothecation, charge, security agreement, security interest, mortgage, pledge or any otherencumbrance, right or claim of any Person of any kind whatsoever whether choate or inchoate, filed or unfiled, noticed or unnoticed,recorded or unrecorded, contingent or non- contingent, material or non-material, known or unknown. “ Losses ” shall mean collectively, direct Damages and the actual, documented out-of-pocket costs, fees and expenses (includingreasonable expenses of investigation and reasonable legal fees and expenses of a single law firm), in any such case arising out of or relatingto any claim, action, suit or proceeding commenced or threatened by any Person or entity (including a Governmental Authority), other thanSeller or Buyer or any of Buyer’s Affiliates, officers, directors, agents or other representatives, and relating to the activities or matterscontemplated by this Agreement, but specifically excluding all Lost Profits and punitive damages. “ Lost Profits ” shall mean collectively, any and all claims, damages and losses in respect of loss of profits and otherconsequential damages, including without limitation indirect damages, special damages, incidental damages and exemplary damages. “ Material Adverse Effect ” shall mean (a) a material adverse effect on the ability of Seller to perform any of its obligationshereunder or under the other Transaction Documents, (b) a material adverse effect on the Purchased Interest or other Assigned Rights orBuyer’s rights therein, including, without limitation, any material adverse effect on the amount, timing or duration of any LicensePayments, (c) a material breach by Seller of any obligation owing by Seller to the Licensee under the License Agreement as a result ofwhich the Licensee may (i) materially reduce or eliminate the amount of the License Payments (whether directly or indirectly, including,without limitation, by counterclaim or setoff), or (ii) terminate the License Agreement prior to the License Termination or (d) a materialbreach by Seller of any obligation owing by Seller to Novartis under the TGF-beta License Agreement as a result of which Novartis may(i) materially reduce or eliminate the amount of the TGF-beta Phase 1 Milestone (whether directly or indirectly, including, withoutlimitation, by counterclaim or setoff), or (ii) terminate the TGF- beta License Agreement prior to the receipt of the TGF-beta Phase 1Milestone. “ Novartis ” shall mean Novartis International Pharmaceutical Ltd. “ Other Payments ” shall mean (a) any sums accrued, paid or due, other than License Payments, that are (i) in lieu of or inrespect of the License Payments; (ii) in satisfaction of the obligation to pay the License Payments; or (iii) indemnity payments, recoveries,damages, settlement or other amounts to which Seller is or may become entitled to pursuant to or in connection with the LicenseAgreement or any item of Intellectual Property licensed thereunder, whether based on actual or alleged infringement, breach, re-licensingor otherwise, in each case described in this clause (iii) to the extent such infringement, breach, default or re-licensing has resulted or wouldresult in a reduction in, or such payment is made in9 lieu of, License Payments described in clause (a) of the definition thereof, but in any event net of any costs and expenses incurred by aXOMA Entity in connection therewith; and (b) the rights of Buyer to Indemnified Expenses pursuant to and in accordance with the termsand conditions of this Agreement. “ Party ” shall mean any XOMA Entity or Buyer, as the context indicates, and “ Parties ” shall mean the XOMA Entities andBuyer. “ Perso n” shall mean an individual, corporation, partnership, limited liability company, limited partnership, association, trust orother entity or organization, but not including any Governmental Authority. “ Product ” shall mean any Product (as defined in the License Agreement). “ Protective Rights Agreement ” shall mean the Protective Rights Agreement by and between Seller and Buyer of even dateherewith, which Protective Rights Agreement shall be substantially in the form of Exhibit D . For the avoidance of doubt, the ProtectiveRights Agreement is not intended to derogate from the validity of the absolute assignment of the Assigned Rights, as contemplated by thisAgreement and as evidenced by the Assignment, but is being executed and delivered solely to protect Buyer’s interests to the extent suchassignment becomes subject to a Recharacterization despite the Parties’ intentions. “ Purchased Interest ” shall mean an undivided 100% interest in Seller’s contract rights under the License Agreement to receiveLicense Payments paid, payable, arising or received on or after the Economic Commencement Date. “ Purchased Interest Payment ” shall mean any payment in respect of the Purchased Interest. “ Receiving Party ” shall mean, with respect to any Confidential Information, the Party receiving the Confidential Informationfrom another Party. “ Recharacterization ” shall mean a judgment or order by a court of competent jurisdiction that Seller’s right, title and interest in,to and under the License Agreement and the Assigned Rights were not fully sold, assigned and transferred to Buyer pursuant to, ascontemplated by, and subject to the provisions of this Agreement and the Assignment, but instead that such transaction(s) constituted a loanand security device. “ Reimbursement Payments ” shall mean indemnity payments to the XOMA Entities and their Affiliates under the LicenseAgreement comprising Damages in respect of third party claims against the XOMA Entities, in each case owed to a XOMA Entitypursuant to the express provisions of the License Agreement. “ Representative ” shall mean, with respect to any Person, directors, officers, employees, agents, and advisors. “ Seller ” shall have the meaning given in the preamble hereto. “ Seller Indemnified Party ” shall mean each XOMA Entity and each of their respective Affiliates and any of their respectivepartners, directors, managers, officers, employees and agents. “ Senior Management ” shall mean the following officers of XOMA or any other XOMA Entity or any other officer, director,manager or internal counsel that has a similar position or has similar responsibilities, powers or duties, regardless of title: Chairman of theBoard; Chief Executive Officer; Chief Operating Officer; Chief Scientific Officer; Chief Financial Officer; Senior Director of IntellectualProperty; and Senior Corporate Counsel and Secretary. 10 “ Subsidiary ” shall mean, with respect to any Person, at any time, any entity of which more than fifty percent (50%) of theoutstanding Voting Stock or other equity interest entitled ordinarily to vote in the election of the directors or other governing body(however designated) is at the time beneficially owned or controlled directly or indirectly by such Person, by one or more such entities orby such Person and one or more such entities. “ TGF-beta License Agreement ” shall mean that certain License Agreement, dated as of September 30, 2015, by and betweenXOMA (US) LLC and Novartis. “ TGF-beta Phase 1 Milestone ” shall mean Development and Regulatory Milestone Number 1 (as set forth in Section 4.2 of theTGF-beta License Agreement as in effect on the date hereof) in the amount of $10.0 million. “ Third Party ” shall mean any Person other than Seller or Buyer or their respective Affiliates. “ Transaction Documents ” shall mean, collectively, this Agreement, the Assignment, the Consent, the Escrow Agreement andthe Protective Rights Agreement. “ UCC ” shall mean the Uniform Commercial Code (or any similar or equivalent legislation) as in effect in any applicablejurisdiction. “ United States Perso n” shall mean a person as defined in Section 7701(a)(30) of the Internal Revenue Code of 1986, asamended. “ Voting Stock ” shall mean Capital Stock issued by a company, or equivalent interests in any other Person, the holders of whichare ordinarily, in the absence of contingencies, entitled to vote for the election of directors (or persons performing similar functions) ofsuch Person, even if the right so to vote has been suspended by the happening of such contingency. “ XOMA ” shall have the meaning given in the preamble hereto. “ XOMA Entity ” shall mean one or more of XOMA and Seller, as the context indicates. Section 1.02 Currency . Unless otherwise specified, all reference tomonetary amounts in this Agreement are references to the lawful currency of the United States. Article II SALE AND ASSIGNMENT Section 2.01 Sale and Assignment. (a) Upon the terms and subject to the conditions set forth in this Agreement, at the Closing,Seller shall sell, assign, transfer and convey to Buyer, free and clear of all Liens (other than any Liens in favor of Buyer) and subject to theconditions set forth in ARTICLE VII and the other provisions of this Agreement, all of Seller’s right, title and interest in, to and under theAssigned Rights, and Buyer shall accept such sale, assignment, transfer and conveyance from Seller. Such sale, assignment, transfer andconveyance shall be evidenced by the execution and delivery of the Assignment by Seller in accordance with Section 7.0 2. 11 (b) Notwithstanding anything to the contrary contained in this Agreement, the sale,assignment, transfer and conveyance to Buyer of the Assigned Rights pursuant to this Agreement shall not subject Buyer to, or transfer,affect or modify, any obligation or liability of Seller under the License Agreement. (c) Seller and Buyer intend and agree that the sale, assignment, transfer and conveyance ofthe Assigned Rights under this Agreement shall be, and is, a true sale by Seller to Buyer that is absolute and irrevocable and that providesBuyer with the full benefits of ownership of the Assigned Rights, and neither Seller nor Buyer intends the transactions contemplatedhereunder to be, or for any purpose characterized as, a financing transaction, borrowing or loan from Buyer to Seller or entitle Buyer to anyother rights or interests except as expressly set forth in this Agreement. Accordingly, Seller and Buyer will treat the sale, assignment,transfer and conveyance of the Assigned Rights as sales of “accounts” or a “payment intangible” (as appropriate) in accordance with theUCC, and Seller hereby authorizes Buyer or its designee(s), from and after the Closing, to execute, record and file such financingstatements (and continuation statements with respect to such financing statements when applicable) naming Seller as the seller and Buyeras the purchaser of the Assigned Rights, as may be necessary to perfect such sale. Seller waives any right to contest or otherwise assert thatthis Agreement is anything other than a true sale by Seller to Buyer under applicable law, which waiver shall be enforceable against Sellerin any bankruptcy or insolvency proceeding relating to Seller. Section 2.02 Purchased Interest Payments. (a) Seller agrees and will use all commercially reasonable efforts to ensure (including takingsuch actions as Buyer shall reasonably request) that the Licensee remits all Purchased Interest Payments the Licensee is required to pay toSeller under the License Agreement directly to the Deposit Account. (b) Pursuant to the Consent, Seller shall instruct the Licensee to (i) remit all PurchasedInterest Payments into the Deposit Account pursuant and subject to Section 6.11 and (ii) furnish all milestone, royalty and other reportsrequired under the License Agreement to Buyer at an address specified by Buyer. Section 2.03 Payments at Closing. (a) Subject to the terms and conditions set forth herein, at the Closing, Buyer shall pay Sellerthe Closing Advance Amount by wire transfer of immediately available funds as directed by Seller. (b) Subject to the terms and conditions set forth herein, at the Closing, Buyer shall depositthe Closing Escrow Amount by wire transfer of immediately available funds into the Escrow Account. Upon such deposit, the amount sodeposited shall be “Escrowed Funds” as defined in the Escrow Agreement, and the release and disbursement thereof shall thereafter begoverned by the terms and conditions of the Escrow Agreement. Section 2.04 No Assumption. Notwithstanding any provision in this Agreement or any other Transaction Document or writing to the contrary, Buyer isaccepting the purchase and assignment of only the Assigned Rights and is not assuming any Excluded Liabilities and Obligations. AllExcluded Liabilities and Obligations shall be retained by and remain obligations and liabilities solely of Seller or its Affiliates . 12 Section 2.05 Excluded Assets. Notwithstanding any provision in this Agreement or any other writing to the contrary, Buyer does not, by purchase, acquisitionor acceptance of the rights granted hereunder or otherwise pursuant to any of the Transaction Documents, purchase, acquire or accept anyassets or contract rights of Seller under the License Agreement, other than the Assigned Rights, or any other assets or rights of Seller . Section 2.06 Non-Assignable Rights. Nothing in this Agreement shall be construed as an attempt or an agreement to assign or cause the assignment of any AssignedRights (other than the Purchased Interest) to the extent the assignment thereof would be prohibited by, require a consent under, orotherwise result in a breach of, any License Agreement; provided that in the case of any Assigned Rights that pursuant to the foregoing arenot assigned, Seller shall act as Buyer’s agent and shall hold such Assigned Rights for the benefit of Buyer. Article III REPRESENTATIONS AND WARRANTIES OF SELLER Seller hereby represents and warrants to Buyer that the following representations are true, correct and complete as of the date ofthis Agreement and as of the Closing Date, except as otherwise indicated: Section 3.01 Organization. Seller is a limited liability company duly formed, validly existing and in good standing under the laws of Delaware. Seller has alllimited liability company powers and all licenses, authorizations, consents and approvals required to carry on its business as nowconducted and as proposed to be conducted in connection with the transactions contemplated by the Transaction Documents and theLicense Agreement. Section 3.02 Authorizations; Enforceability. (a) Seller has all necessary limited liability company power and authority to enter into,execute and deliver this Agreement and the other Transaction Documents and to perform all of the obligations to be performed by ithereunder and thereunder and to consummate the transactions contemplated hereunder and thereunder. (b) Once signed, the Transaction Documents will have been duly authorized, executed anddelivered by Seller and each Transaction Document will then constitute the valid and binding obligation of Seller, enforceable againstSeller in accordance with their respective terms, subject, as to enforcement of remedies, to bankruptcy, insolvency, reorganization,moratorium or similar laws affecting creditors’ rights generally or general equitable principles. Section 3.03 Litigation. There are no (i) Disputes pending or, to the Knowledge of Seller, threatened against Seller, or to the Knowledge of Seller,Disputes pending or threatened against the Licensee, or (ii) to the Knowledge of Seller, inquiries of any Governmental Authority pendingor threatened against Seller or the Licensee, which, in each instance of clauses (i) and (ii), if adversely determined, could reasonably beexpected to have a Material Adverse Effect. 13 Section 3.04 Compliance with Laws. Seller (i) is not in violation of, has not violated, and is not under investigation with respect to, and (ii)has not been threatened to be,charged with or been given written notice of any violation of any law, rule, ordinance or regulation of, or any judgment, order, writ, decree,permit or license entered by, any Governmental Authority which, in the case of either clause (i) or clause (ii), could reasonably be expectedto have a Material Adverse Effect. Section 3.05 Conflicts; Consents. (a) Neither the execution and delivery by Seller of any of the Transaction Documents nor theperformance or consummation of the transactions contemplated thereby (including, without limitation, the assignment to Buyer of theAssigned Rights) to be performed or consummated by Seller will: (i) contravene, conflict with, result in a breach or violation of, constitutea default under, or accelerate the performance provided by, in any material respects any provisions of: (A) any law, rule, ordinance orregulation of any Governmental Authority, or any judgment, order, writ, decree, permit or license of any Governmental Authority, in anycase, applicable to the Purchased Interest or the Collateral; or (B) any material contract, agreement, commitment or instrument to whichSeller is a party or by which any of the Collateral is bound or committed; (ii) except for the filing of the UCC-1 financing statementsrequired hereunder (or under the Protective Rights Agreement), the Consent and notices contemplated by the Transaction Documents,require any notification to, filing with, or consent of, any Person or Governmental Authority; (iii) give rise to any right of termination,cancellation or acceleration of any right or obligation of Seller or any other Person as such right or obligation relates to the PurchasedInterest, the Purchased Interest Payments or any of the other Collateral or to a loss of any benefit relating to the Purchased Interest, thePurchased Interest Payments or any of the other Collateral; or (iv) result in the creation or imposition of any Lien on any the PurchasedInterest, the Purchased Interest Payments or any of the other Collateral, other than in favor of Buyer pursuant to the Protective RightsAgreement. (b) Except pursuant to the Transaction Documents, Seller has neither granted nor agreed togrant to any Person other than Buyer, nor does there exist, any Lien granted by Seller on the Purchased Interest or any other Collateralother than pursuant to the Protective Rights Agreement. (c) Neither Seller nor any of its property is subject (i) to any judgment, order, writ or decreeof any Governmental Authority or (ii) to any contract, agreement, commitment or instrument, which, in either case of clause (i) or clause(ii), the violation or breach of which by Seller could reasonably be expected to have a Material Adverse Effect. Section 3.06 Ownership. Immediately prior to the assignment thereof to Buyer pursuant to this Agreement, Seller owns, and is the sole holder of all of theAssigned Rights, free and clear of any and all Liens (other than any Liens in favor of Buyer). Seller has not transferred, sold, conveyed,assigned, or otherwise disposed of, or agreed to transfer, sell, convey, assign, or otherwise dispose of any portion of the License Agreementand/or the Assigned Rights other than as contemplated by this Agreement. Upon delivery to Buyer of the executed Assignment, no Personother than Buyer shall have any right to receive the Purchased Interest. Upon delivery to Buyer of the executed Assignment, Seller shallhave sold, transferred, conveyed and assigned to Buyer all of Seller’s right, title and interest in the Assigned Rights, free and clear of anyLiens (other than any Liens in favor of Buyer), but subject to the further provisions of this Agreement. Section 3.07 Subordination. Seller has not agreed to any contractual subordination of the License Payments to the rights of any creditor of the Licensee orany other Person.14 Section 3.08 License Agreement. (a) Seller has been provided a true, correct and complete copy of the License Agreementincluding all amendments, waivers, consents and other modifications thereto currently in effect. The License Agreement constitutes theonly applicable agreement (other than the Transaction Documents) to which Seller is a party regarding the License Payments. To theKnowledge of Seller, there are no unpaid License Payments that have become due, and none are expected to become overdue, as of theClosing Date. (b) Seller is not in breach of the License Agreement (other than immaterial breachespreviously disclosed to Buyer) and, to the Knowledge of Seller, no circumstances or grounds exist that would give rise (i) to a claim by theLicensee of a breach by any XOMA Entity of the License Agreement, or (ii) to a right of the Licensee to require rescission, termination orrevision of the License Agreement or setoff against the License Payments. Seller has no material unfulfilled obligations in respect of theLicense Agreement or the Assigned Rights that were required to be fulfilled on or prior to the date of this Agreement. (c) To the Knowledge of Seller, the Licensee is not in breach of or in default under theLicense Agreement. (d) To the Knowledge of Seller, no circumstance or grounds exist, that would invalidate,reduce or eliminate, in whole or in part, the enforceability or scope of the Assigned Rights including with respect to Seller’s right topayments made in respect of License Payments. (e) The License Agreement is valid and binding on Seller in accordance with its terms and, tothe Knowledge of Seller, the License Agreement is valid and binding on each of the other parties thereto in accordance with its terms, ineach case subject to bankruptcy, insolvency, reorganization, moratorium, or other laws affecting creditors’ rights generally or generalequitable principles, and is in full force and effect. (f)Seller has not: (i) forgiven, released, delayed, postponed or compromised any paymentin respect the License Payments; (ii) except as set forth in the data room and made available to Buyer priorto the date hereof, amended, modified, restated, cancelled, supplemented, terminated or waived any provision of theLicense Agreement including the Assigned Rights, or granted any consent thereunder, or agreed to do any of theforegoing; 15 (iii) exercised any right of rescission, offset, counterclaim or defense, uponor with respect to the Assigned Rights or the Collateral, or agreed to do or suffer to exist any of the foregoing; (iv) sold, leased, pledged, licensed, transferred or assigned (or attempted todo any of the foregoing) all or any portion of the Assigned Rights and/or the License Agreement, except in favor ofBuyer pursuant to the Transaction Documents; or (v) received an y advance payment s on an y o f the Licens e Payments (g)Seller has not been released from any of its obligations under the License Agreement.(h) Seller has not received any written notice from the Licensee that the Licensee has grantedany sublicense of Seller or the Licensee’s rights under the License Agreement. Seller has not received any written notice and has noKnowledge (i) of the Licensee’s intention to terminate, amend or restate the License Agreement, in whole or in part, (ii) of the Licensee’sor any other Person’s or Governmental Authority’s (where applicable) intention to challenge the validity or enforceability of the LicenseAgreement or the obligation of the Licensee to pay the License Payments or other monetary payments under such License Agreement, or(iii) that the Licensee is in default of any of its obligations under the License Agreement. Seller has no intention of terminating, amendingor restating the License Agreement and has not given the Licensee notice of termination (or request to amend or restate any provision) ofthe License Agreement, in whole or in part. Section 3.09 Broker’s Fees. Except for a pending Engagement Letter with Torreya Capital, Seller has not taken any action that would entitle any Person toany commission or broker’s fee in connection with the transactions contemplated by the Transaction Documents. Any payments or otherconsideration of any kind paid, payable, due or owing to Torreya Capital or any other Person pursuant to such Engagement Letter shall bethe sole and exclusive responsibility of Seller and/or XOMA and not, in any event or in any respect, Buyer. Section 3.10 Solvency; No Material Adverse Effect. Upon consummation of the transactions contemplated by the Transaction Documents, (a) the fair saleable value of Seller’s assetswill be greater than the sum of its debts and other obligations, including contingent liabilities, and (b) the present fair saleable value ofSeller’s assets will be greater than the amount that would be required to pay its probable liabilities on its existing debts and otherobligations, including contingent liabilities, as they become absolute and matured. No Insolvency Event has occurred regarding Seller. Tothe Knowledge of Seller, no event has occurred and no condition exists that could reasonably be expected to have a Material AdverseEffect. Section 3.11 Intellectual Property Matters. (a) To the Knowledge of Seller, all of the representations and warranties given by anyXOMA Entity or any past or present Affiliate of a XOMA Entity, or any predecessor in interest of any thereof, in the License Agreementrelating to the Intellectual Property underlying the License Agreement were true and correct as of the date given.(b) To the Knowledge of Seller, (a) the product candidates known as (i) lanadelumab/DX-2930 (anti-kallikrein), (ii) KD-014/DX-2400 (anti- MMP-14) and (iii) imalumab/SHP653 (anti-MIF) are all “Products” as such term isdefined in the License Agreement and16 (b) the product candidate known as XOMA089 is a “Licensed Antibody” as such term is defined in the TGF-beta License Agreement. Section 3.12 Exploitation. To the Knowledge of Seller, (a) the Licensee is not considering ceasing to Exploit either of the product candidates known asDX-2930 or SHP653 and (b) Novartis is not considering ceasing to Exploit the product candidate known as XOMA089 and intends to fileor has filed an Investigational New Drug application with respect thereto. Section 3.13 Taxes. All License Payments received by any XOMA Entity prior to the Closing Date have been made without any deduction orwithholding for or on account of any tax. Section 3.14 No Set-Offs; No Material Liabilities. (a) Except as expressly set forth in the License Agreement, the Licensee has no right of set-off under any contract or other agreement against the License Payments or other monetary payments on account of the Purchased Interestpayable to Seller under the License Agreement. The Licensee has not exercised, and, to Seller’s Knowledge, Licensee has not had the rightto exercise any set- off against the License Payments or other monetary payments on account of the Purchased Interest payable to Sellerunder the License Agreement. (b) Except as expressly set forth in the License Agreement, there are no material liabilities ofSeller or its Affiliates related to the Purchased Interest, the License Payments or the License Agreement of any kind whatsoever, whetheraccrued, contingent, absolute, determined, determinable or otherwise, and there is no existing condition or set of circumstances whichcould reasonably be expected to result in any such liability. Without limiting the generality of the foregoing, to the knowledge of Sellerafter review of the filings by Shire plc with the U.S. Securities and Exchange Commission since February 23, 2016, there have been noserious, adverse events, or other events or circumstances suggesting a significant hazard to humans, with respect to any Product indevelopment as of the date of this Agreement. Section 3.15 TGF-beta License Agreement. (a) Seller has been provided a true, correct and complete copy of the TGF-beta LicenseAgreement including all amendments, waivers, consents and other modifications thereto currently in effect. The License Agreementconstitutes the only applicable agreement (other than the Transaction Documents) to which Seller is a party regarding the TGF-beta Phase1 Milestone. (b) Seller is not in breach of the TGF-beta License Agreement and, to the Knowledge ofSeller, no circumstances or grounds exist that would give rise (i) to a claim by Novartis of a breach by any XOMA Entity of the TGF-betaLicense Agreement, or (ii) to a right of Novartis to require rescission, termination or revision of the TGF-beta License Agreement or setoffagainst, or that would invalidate, reduce or eliminate, in whole or in part, the TGF-beta Phase 1 Milestone. 17 (c) The TGF-beta License Agreement is valid and binding on Seller in accordance with itsterms and, to the Knowledge of Seller, the TGF-beta License Agreement is valid and binding on each of the other parties thereto inaccordance with its terms, in each case subject to bankruptcy, insolvency, reorganization, moratorium, or other laws affecting creditors’rights generally or general equitable principles, and is in full force and effect. Article IV REPRESENTATIONS AND WARRANTIES OF XOMA XOMA hereby represents and warrants to Buyer that the following representations are true, correct and complete as of the dateof this Agreement and as of the Closing Date, except as otherwise indicated: Section 4.01 Organization. XOMA is a corporation duly incorporated, validly existing and in good standing under the laws of Delaware. XOMA has allcorporate powers and all licenses, authorizations, consents and approvals required to carry on its business as now conducted and asproposed to be conducted in connection with the transactions contemplated by the Transaction Documents and the License Agreement. Section 4.02 Authorizations; Enforceability. (a) XOMA has all necessary corporate power and authority to enter into, execute and deliverthis Agreement and the other Transaction Documents and to perform all of the obligations to be performed by it hereunder and thereunderand to consummate the transactions contemplated hereunder and thereunder. (b) Once signed, the Transaction Documents will have been duly authorized, executed anddelivered by XOMA and each Transaction Document will then constitute the valid and binding obligation of XOMA, enforceable againstXOMA in accordance with their respective terms, subject, as to enforcement of remedies, to bankruptcy, insolvency, reorganization,moratorium or similar laws affecting creditors’ rights generally or general equitable principles. Section 4.03 Conflicts; Consents. (a) Neither the execution and delivery by XOMA of any of the Transaction Documents northe performance or consummation of the transactions contemplated thereby (including, without limitation, the assignment to Buyer of thePurchased Interest) to be performed or consummated by XOMA will: (i) contravene, conflict with, result in a breach or violation of,constitute a default under, or accelerate the performance provided by, in any material respects any provisions of: (A) any law, rule,ordinance or regulation of any Governmental Authority, or any judgment, order, writ, decree, permit or license of any GovernmentalAuthority, in any case, applicable to the Purchased Interest or the Collateral; or (B) any material contract, agreement, commitment orinstrument to which XOMA is a party or by which any of the Collateral is bound or committed; (ii) except for the filing of the UCC-1financing statements required hereunder (or under the Protective Rights Agreement), the Consent and notices contemplated by theTransaction Documents, require any notification to, filing with, or consent of, any Person or Governmental Authority; (iii) give rise to anyright of termination, cancellation or acceleration of any right or obligation of XOMA or any other Person as such right or obligation relatesto the Purchased Interest, the Purchased Interest Payments or any of the other Collateral or to a loss of any benefit relating to the PurchasedInterest, the Purchased Interest Payments or any of the other Collateral; 18 or (iv) result in the creation or imposition of any Lien on any the Purchased Interest, the Purchased Interest Payments or any of the otherCollateral, other than in favor of Buyer pursuant to the Protective Rights Agreement. (b) Except pursuant to the Transaction Documents, XOMA has not granted or agreed togrant to any Person other than Buyer, nor does there exist, any Lien granted by XOMA on the Purchased Interest or any other Collateralother than pursuant to the Protective Rights Agreement. (c) Neither XOMA nor any of its property is subject (i) to any judgment, order, writ ordecree of any Governmental Authority or (ii) to any contract, agreement, commitment or instrument, which, in either case of clause (i) orclause (ii), the violation or breach of which by XOMA could reasonably be expected to have a Material Adverse Effect. Section 4.04 Broker’s Fees. Except for a pending Engagement Letter with Torreya Capital, XOMA has not taken any action that would entitle any Person toany commission or broker’s fee in connection with the transactions contemplated by the Transaction Documents. Any payments or otherconsideration of any kind paid, payable, due or owing to Torreya Capital or any other Person pursuant to such Engagement Letter shall bethe sole and exclusive responsibility of Seller and/or XOMA and not, in any event or in any respect, Buyer. Section 4.05 Intellectual Property Matters. (a) To the Knowledge of XOMA, all of the representations and warranties given by anyXOMA Entity or any past or present Affiliate of a XOMA Entity, or any predecessor in interest of any thereof, in the License Agreementrelating to the Intellectual Property underlying such License Agreement were true and correct as of the date given. (b) To the Knowledge of Seller, (a) the product candidates known as (i) lanadelumab/DX-2930 (anti-kallikrein), (ii) KD-014 /DX-2400 (anti- MMP-14) and (iii) imalumab/SHP653 (anti-MIF) are all “Products” as such term isdefined in the License Agreement and(b) the product candidate known as XOMA089 is a “Licensed Antibody” as such term is defined in the TGF-beta License Agreement. Section 4.06 Taxes. All License Payments received by any XOMA Entity prior to the Closing Date have been made without any deduction orwithholding for or on account of any tax. Section 4.07 Material Inducement. Each of the Parties hereby acknowledges that the representations, warranties and covenants of XOMA to Buyer set forth in thisAgreement are, collectively, a material inducement to Buyer to enter into and consummate the transactions contemplated by thisAgreement. 19 Article V REPRESENTATIONS AND WARRANTIES OF BUYER Buyer hereby represents and warrants to Seller that the following representations are true, correct and complete as of the date ofthis Agreement and as of the Closing Date, except as otherwise indicated: Section 5.01 Organization. Buyer is a limited partnership formed and validly existing under the laws of the State of Delaware, and has all limitedpartnership powers and all licenses, authorizations, consents and approvals required to carry on its business as now conducted and asproposed to be conducted in connection with the transactions contemplated by the Transaction Documents. Section 5.02 Authorization. Buyer has all necessary limited partnership power and authority to enter into, execute and deliver this Agreement and the otherTransaction Documents and to perform all of the obligations to be performed by it hereunder and thereunder and to consummate thetransactions contemplated hereunder and thereunder. Once signed, the Transaction Documents will have been duly authorized, executedand delivered by Buyer and each Transaction Document will then constitute the valid and binding obligation of Buyer, enforceable againstBuyer in accordance with their respective terms, subject, as to enforcement of remedies, to bankruptcy, insolvency, reorganization,moratorium or similar laws affecting creditors’ rights generally or general equitable principles. Section 5.03 Broker’s Fees. None of Buyer or its Affiliates has taken any action that would entitle any Person to any commission or broker’s fee inconnection with the transactions contemplated by the Transaction Documents. Section 5.04 Conflicts. Neither the execution and delivery of this Agreement or any other Transaction Document nor the performance or consummationof the transactions contemplated hereby or thereby will: (i) contravene, conflict with, result in a breach or violation of, constitute a defaultunder, or accelerate the performance provided by, in any material respects, any provisions of: (A) any law, rule or regulation of anyGovernmental Authority, or any judgment, order, writ, decree, permit or license of any Governmental Authority, to which Buyer or any ofits assets or properties may be subject or bound; or (B) any contract, agreement, commitment or instrument to which Buyer is a party or bywhich Buyer or any of its assets or properties is bound or committed; (ii) contravene, conflict with, result in a breach or violation of,constitute a default under, or accelerate the performance provided by, any provisions of the organizational or constitutional documents ofBuyer; or (iii) require any notification to, filing with, or consent of, any Person or Governmental Authority. 20 Article VI COVENANTS During the term of this Agreement, the following covenants shall apply: Section 6.01 Consents and Waivers. Seller and Buyer shall use commercially reasonable efforts to obtain and maintain any required consents, acknowledgements,certificates or waivers so that the transactions contemplated by this Agreement or any other Transaction Document may be consummatedand shall not result in any default or breach or termination of the License Agreement. Section 6.02 Compliance. Seller and XOMA shall comply with and fulfill, in all material respects, all of their respective obligations under the LicenseAgreement. Section 6.03 Confidentiality; Public Announcement. (a) Except as expressly authorized in this Agreement or the other Transaction Documents orexcept with the prior written consent of the Disclosing Party, the Receiving Party hereby agrees that (i) it will, and will cause itsRepresentatives to, use the Confidential Information of the Disclosing Party solely for the purpose of the transactions contemplated by thisAgreement and the other Transaction Documents and exercising its rights and remedies and performing its obligations hereunder andthereunder; (ii) it will, and will cause its Representatives to, keep confidential the Confidential Information of the Disclosing Party; and(iii) it will not, and will ensure that its Representatives will not, furnish or disclose to any Person any Confidential Information of theDisclosing Party. (b) Notwithstanding anything to the contrary set forth in this Agreement or any otherTransaction Document, the Receiving Party may, without the consent of the Disclosing Party, but with prior written notice whenpermissible to the Disclosing Party and subject to compliance with any confidentiality obligations applicable to the relevant ConfidentialInformation under the License Agreement, furnish or disclose Confidential Information of the Disclosing Party to the Receiving Party’sAffiliates and its and their respective Representatives, actual or potential financing sources, underwriters, investment bankers, ratingagencies, investors or co-investors and permitted assignees, buyers, transferees or successors-in-interest under Section 9.03 , in each suchcase, who need to know such information in order to provide or evaluate the provision of financing to the Receiving Party or any of itsAffiliates or to assist the Receiving Party in evaluating the transactions contemplated by this Agreement and the other TransactionDocuments, in connection with such actual or potential assignment, sale or transfer, or in exercising its rights and remedies and performingits obligations hereunder and thereunder and who are, prior to such furnishing or disclosure, informed of the confidentiality and non-useobligations contained in this Section 6.03 and who are bound by written or professional confidentiality and non-use obligations no lessstringent than those contained in this Section 6.0 3. (c) In the event that the Receiving Party, its Affiliates or any of their respectiveRepresentatives is required by applicable law, applicable stock exchange requirements or legal or judicial process (including by deposition,interrogatory, request for documents, subpoena, civil investigative demand or similar process) to furnish or disclose any portion of theConfidential Information of the Disclosing Party, the Receiving Party shall, to the extent legally permitted, provide the Disclosing Party, aspromptly as practicable, with written notice of the existence of, and terms and circumstances relating to, such requirement, so that theDisclosing Party may seek, at its expense, a protective order or other appropriate remedy (and, if the Disclosing Party seeks such an order,the Receiving Party, such Affiliates21 or such Representatives, as the case may be, shall provide, at their expense, such cooperation as such Disclosing Party shall reasonablyrequire). Subject to the foregoing, the Receiving Party, such Affiliates or such Representatives, as the case may be, may disclose thatportion (and only that portion) of the Confidential Information of the Disclosing Party that is legally required to be disclosed; provided ,however , that the Receiving Party, such Affiliates or such Representatives, as the case may be, shall exercise reasonable efforts (at theirexpense) to preserve the confidentiality of the Confidential Information of the Disclosing Party, including by obtaining reliable assurancethat confidential treatment will be accorded any such Confidential Information disclosed. Notwithstanding anything to the contrarycontained in this Agreement or any of the other Transaction Documents, in the event that the Receiving Party or any of its Affiliatesreceives a request from an authorized representative of a U.S. or foreign tax authority for a copy of this Agreement or any of the otherTransaction Documents, the Receiving Party or such Affiliate, as the case may be, may provide a copy hereof or thereof to such taxauthority representative without advance notice to, or the consent of, the Disclosing Party; provided , however , that the Receiving Partyshall, to the extent legally permitted, provide the Disclosing Party with written notice of such disclosure as soon as practicable. (d) Notwithstanding anything to the contrary contained in this Agreement or any of the otherTransaction Documents, (i) the Receiving Party may disclose the Confidential Information of the Disclosing Party, including thisAgreement, the other Transaction Documents and the terms and conditions hereof and thereof, to the extent necessary in connection withthe enforcement of its rights and remedies hereunder or thereunder or as required to perfect the Receiving Party’s rights hereunder orthereunder, and (ii) the XOMA Entities may disclose the Transaction Documents in any required filings with the Securities and ExchangeCommission and other applicable regulatory authorities and stock exchanges. (e) No Party shall, and each Party shall cause its Affiliates not to, without the prior writtenconsent of the other Parties (which consent shall not be unreasonably withheld or delayed), issue any press release with respect to thetransactions contemplated by this Agreement or any other Transaction Document, unless the Party proposing (or whose Affiliate proposes)to issue such press release uses commercially reasonable efforts to consult in good faith with the other Parties regarding the form andcontent thereof before issuing such press release. (f) Except with respect to Buyer’s internal communications or private communications withits Representatives, Buyer shall not, and shall cause its Representatives, its Affiliates and its Affiliates’ Representatives not to make use ofthe name, nickname, trademark, logo, service mark, trade dress or other name, term, mark or symbol identifying or associated with Sellerwithout Seller’s prior written consent to the specific use in question; provided that the consent of Seller shall not be required with respect topublication of Seller’s name and logos in Buyer’s promotional materials, including without limitation the websites for Buyer and itsAffiliates consistent with its use of other similarly situated Third Parties’ names and logos. (g) In addition to the terms of this Section 6.03, Buyer also acknowledges that anyConfidential Information (as defined in the License Agreement) it receives shall be subject to the applicable confidentiality provisionscontained in the License Agreement to the same extent that such Confidential Information would be subject to such confidentialityprovisions if received by any XOMA Entity, and that Buyer shall be bound by such confidentiality provisions. (h) Buyer and XOMA hereby (i) agree that, notwithstanding the terms thereof, theConfidentiality Agreement is hereby terminated and (ii) acknowledge that this Agreement shall supersede such Confidentiality Agreementwith respect to the treatment of Confidential Information by the Parties (including, without limitation, with regard to ConfidentialInformation previously provided pursuant to such Confidentiality Agreement). 22 Section 6.04 Protective Rights Agreement. For protective purposes only and to secure Seller’s performance of its obligations hereunder to the extent the assignmenthereunder, as evidenced by the Assignment, becomes subject to a Recharacterization despite the Parties’ intentions, Seller shall executeand deliver the Protective Rights Agreement at the Closing as contemplated by Section 7.02(d) . Section 6.05 Further Assurances. (a) Subject to the terms and conditions of this Agreement, each of Buyer and Seller will usecommercially reasonable efforts to take, or cause to be taken, all actions and to do, or cause to be done, all things necessary underapplicable laws and regulations to consummate the transactions contemplated by this Agreement and any other Transaction Document.Buyer and Seller agree to execute and deliver such other documents, certificates, agreements and other writings (including any financingstatement filings, other documents, certificates or agreements requested by Buyer) and to take such other actions as may be reasonablynecessary to carry out and effectuate all of the provisions of this Agreement and any other Transaction Document, to consummate thetransactions contemplated by this Agreement and any other Transaction Document and to vest in Buyer all of Seller’s rights (whether joint,several or joint and several) under the License Agreement, including, without limitation, the Assigned Rights, free and clear of all Liens,except those Liens created in favor of Buyer pursuant to the Protective Rights Agreement and subject to the further provisions of thisAgreement and Liens incurred by Buyer. (b) Except for disputes between one or more of the XOMA Entities, on the one hand, andBuyer, on the other hand, each of the Parties shall cooperate and provide assistance as reasonably requested by the other Parties (and at noexpense to the requesting Party unless the requesting Party is obligated to indemnify the other Parties pursuant to the requesting Party’sindemnification obligations provided for in this Agreement) in connection with any litigation, arbitration or other proceeding (whetherthreatened, existing, initiated, or contemplated prior to, on or after the date hereof) to which any Party or any of its officers, directors,shareholders, agents or employees is or may become a party or is or may become otherwise directly or indirectly affected or as to whichany such Persons have a direct or indirect interests, in each case relating to this Agreement or any other Transaction Document, and theAssigned Rights, the License Agreement, the Collateral, or the transactions described herein or therein. In particular, without limitation,Seller shall, upon request of Buyer, be available and fully cooperate with and support Buyer free of charge in connection with theenforcement of the Assigned Rights under the License Agreement. Section 6.06 Notice by Seller. (a) Seller shall provide Buyer with written notice as promptly as practicable (and in anyevent within five (5) Business Days) after becoming aware of any of the following: (i) any breach or default by any XOMA Entity of any covenant,agreement or other provision of this Agreement or any other Transaction Document; (ii) any representation or warranty made or deemed made by any XOMAEntity in any of the Transaction Documents or in any certificate delivered to Buyer pursuant to any TransactionDocuments shall prove to be untrue, incorrect or incomplete in any material respect on the date as of which made ordeemed made; (iii) the occurrence of an Insolvency Event with respect to any XOMAEntity or the occurrence of any equivalent event with respect to the Licensee; 23 (iv) the occurrence of any event or circumstance that could reasonably beexpected to have a Material Adverse Effect; (v) any breach or default by the Licensee under the License Agreement;and (vi) any written notice, report (including without limitation royaltyreports and worksheets) or other written communication, together with copies of the same, received from or on behalfof Licensee with respect to the Purchased Interest, any of the other Assigned Rights or the License Agreement. (i) (b) In the event any oral communication is received by Seller from the Licensee or Novartisthe substance of which could reasonably be expected to have a Material Adverse Effect, Seller shall promptly inform Buyer of such oralcommunication and provide a reasonable description of such oral communication. Section 6.07 Enforcement of and Disputes Under License Agreement. (a) In the event (i) the Licensee is in breach or default of an obligation or restriction underthe License Agreement in a manner that is reasonably likely to adversely affect the License Payments, the Purchased Interest or theAssigned Rights or (ii) of any dispute arising under the License Agreement between Seller and/or Buyer, on the one hand, and theLicensee, on the other hand, that relates to or is reasonably likely to adversely affect the License Payments, the Purchased Interest or theAssigned Rights, Seller or Buyer, as applicable, shall inform the other Parties of such breach, default or dispute and shall providereasonable detail regarding the nature of such breach, default or dispute. Seller and Buyer shall consult with each other regarding suchbreaches, defaults and disputes and as to the timing, manner and conduct of any enforcement of Licensee’s obligations or restrictions underthe License Agreement or other means of dispute resolution relating thereto. If after ten (10) Business Days the Parties cannot agree on thetiming, manner and conduct of such enforcement or means of dispute resolution, then Seller shall take such actions as Buyer shall requestto enforce the Licensee’s obligations and restrictions under the License Agreement and/or to resolve such dispute, as applicable. (b) Buyer shall have the sole right to determine the timing, manner and conduct of anyenforcement of the Licensee’s obligations or restrictions under the License Agreement or means of dispute resolution as described inSection 6.07(a) above, including, without limitation, the selection of any counsel to assist in such enforcement or dispute resolution and thecommencement of any legal action or suit, and upon Buyer’s request, Seller shall cooperate with Buyer to enforce and assist Buyer inenforcing compliance by the Licensee with the relevant provisions of the License Agreement and the exercise of such rights and remediesrelating to such breach or default or alleged breach or default as shall be available to Seller or Buyer and as directed by Buyer, whetherunder the License Agreement or by operation of applicable law, including bringing (to the extent Seller is entitled to so bring), or joiningin, any legal action or suit requested or commenced by Buyer. Seller shall not consent to the entry of any judgment or enter into anycompromise or settlement with respect to such enforcement of the License Agreement against the Licensee without the prior writtenconsent of Buyer. (c) All reasonable and documented out-of-pocket costs and expenses (including reasonableand documented counsel fees and expenses for one counsel per jurisdiction) incurred in connection with any enforcement or disputeresolution efforts pursuant to this Section 6.07 shall be borne by Seller, provided that any amounts recovered as a result of any judgment orother monetary award or settlement in respect of an action brought or settlement reached pursuant to this Section 6.07 shall be first appliedto reimburse Seller and/or XOMA for its costs incurred in connection therewith and the remainder, if any, shall then be treated asPurchased Interest.24 (d) Notwithstanding the foregoing, neither Seller nor any other XOMA Entity shall beresponsible to bear or reimburse costs and expenses for litigation for any dispute involving less than $300,000. Section 6.08 Negative Covenants. Seller shall not, without the prior written consent of Buyer: (a) forgive, release or reduce any amount, or delay or postpone (other than on acommercially reasonable basis) any amount, owed to Seller relating to the License Payments; (b) create, incur, assume or suffer to exist any Lien, upon or with respect to the AssignedRights, the other Collateral or the right to receive License Payments, or agree to do or suffer to exist any of the foregoing, except for anyLien or agreements in favor of Buyer granted under or pursuant to this Agreement and the other Transaction Documents; (c) waive, amend, cancel or terminate, exercise or fail to exercise, any material rightsconstituting or relating to the License Payments, the Purchased Interest or any other Assigned Rights; (d) amend, modify, restate, cancel, supplement, terminate or waive any provision of theLicense Agreement, or grant any consent thereunder, or agree to do any of the foregoing; or (e) until the earlier of (i) receipt of the Consent or (ii) payment to Buyer of the amountspecified in Section 6.12(b) , amend, modify, restate, cancel, supplement, terminate or waive any provision of the TGF-beta LicenseAgreement relating directly or indirectly to the amount or timing of the TGF-beta Phase 1 Milestone, or grant any consent thereunder, ineach case that could negatively impact the amount or timing of the TGF-beta Phase 1 Milestone, or agree to do any of the foregoing. Section 6.09 Future Agreements. Seller shall not enter into any agreement that could reasonably be expected to have a Material Adverse Effect without Buyer’sprior written consent. Section 6.10 Reports; Records; Access. (a) During the term of this Agreement and for a period of two (2) years thereafter, Sellershall keep and maintain proper books of record and account in which true, correct and complete entries in conformity with U.S. generallyaccepted accounting principles and all requirements of applicable law are made of all dealings and transactions as are adequate to calculatecorrectly and verify the accuracy of all reports and all Purchased Interest Payments. (b)During the term of this Agreement: (i) Buyer and its representatives shall have the right, from time to time during normalbusiness hours and upon at least fifteen (15) Business Days’ prior written notice to Seller, but no more frequently than one (1)time per calendar year without cause, as determined by Buyer in its reasonable discretion, to visit the offices and properties ofSeller where books and records relating or pertaining to the Purchased Interest Payments, the License Payments, the PurchasedInterest, the Assigned Rights and the other Collateral are kept and maintained, to inspect and make extracts from and copies ofsuch books and records, to discuss, with officers of Seller, the business, operations, properties and financial and other conditionof Seller and to verify the accuracy of the reports, the Purchased Interest Payments and the License Payments. In25 the event any inspection of such books and records reveals any underpayment of any Purchased Interest Payment in respect ofany Fiscal Quarter, Seller shall pay promptly (but in any event within five (5) Business Days thereafter) to Buyer the amount ofsuch underpayment; and(ii) if such underpayment exceeds five percent (5%) of the Purchased Interest Payment thatwas required to be made in respect of such Fiscal Quarter, the reasonable out-of- pocket fees and expenses incurred by Buyerand its Affiliates in connection with such inspection will be borne by Seller (in all other cases, such fees and expenses will beborne by Buyer and its Affiliates). All information furnished or disclosed to Buyer or any of its representatives in connectionwith any inspection shall constitute Confidential Information of Seller and shall be subject to the provisions of Section 6.0 3. (c) Seller shall deliver to Buyer such information and data relating or pertaining to thePurchased Interest Payments, the License Agreement, the Purchased Interest, the Assigned Rights and the other Collateral as Buyer shallreasonably request, promptly upon such request. (d) Upon the request of Buyer, Seller shall at least once per calendar year, on at least 15Business Days’ notice, cause such of the officers and employees of Seller as shall be reasonably identified by Buyer in such notice to meet,or, at Buyer’s option, to participate in a conference call with, Buyer for the purpose of discussing the Assigned Rights, the LicenseAgreement or any Product. Section 6.11 Remittance to Deposit Account; Set-Offs. (a) Seller shall instruct the Licensee to remit all amounts payable to Seller pursuant to theLicense Agreement directly to the Deposit Account and may not change or otherwise amend such instruction without the prior writtenconsent of Buyer. All payments made to Seller on account of the License Payments shall be immediately remitted to the Deposit Accountand shall be held by Seller in trust for the benefit of Buyer until so remitted. Seller shall have no right, title or interest whatsoever in suchamounts and shall not create any Lien thereon. Amounts deposited into the Deposit Account shall be in United States dollars. (b) If Seller fails to pay any amount that it is contractually obligated to pay to the Licensee,and, as a consequence of such failure to pay, the Licensee exercises a right of set-off and reduces amounts payable in respect of anyLicense Payment, then Seller shall promptly, and in any event no later than five (5) Business Days, following the date on which Sellerbecomes aware of such setoff pay to Buyer a sum equal to the amount of such reduction and in the currency in which the amount offset isdenominated. Section 6.12 Certain Payments; Option. (a) In the event the Consent is received within 30 days following the Closing Date and theEscrowed Funds (as defined in the Escrow Agreement) are released in accordance with the Escrow Agreement, Buyer agrees to reimburseSeller for any consent fee paid to the Licensee as consideration for the Consent in an amount not to exceed $100,000. (b) In the event the Consent is not received within 30 days following the Closing Date, Sellershall pay to Buyer, directly from the proceeds to Seller of the TGF-beta Phase 1 Milestone, an amount equal to $4,000,000 promptly, andin no event more than two (2) Business Days, following receipt of the TGF-beta Phase 1 Milestone by Seller or XOMA from Novartis, bywire transfer to the Deposit Account. (c) Without limiting Buyer’s right to the payment referred to in clause (b) above in thecircumstances set forth therein, in the event the Consent is received more than 30 days, but less than26 60 days, after the Closing Date, Buyer agrees to purchase all of Seller’s right, title and interest in, to and under the Assigned Rights on theterms and conditions set forth in this Agreement for the Full Purchase Price so long as the conditions set forth in clauses (a), (b), (f) and (g)of Section 7.02 are satisfied or waived by Buyer in its sole discretion. (d) Without limiting Buyer’s right to the payment referred to in clause (b) above in thecircumstances set forth therein, in the event the Consent is received more than 60 days following the Closing Date, Buyer will have theoption, exercisable on or after the 60 th day, but prior to the 180 th day, following the Closing Date, to purchase all of Seller’s right, title andinterest in, to and under the Assigned Rights on the terms and conditions set forth herein for the Full Purchase Price by written notice of theexercise of such option to Seller. (e) Consummation of the purchase described in clause (c) or clause (d) above, whichever isapplicable, shall take place promptly following receipt of the Consent and satisfaction of the other conditions referred to therein. In suchcircumstances, the parties agree to execute and deliver the Assignment and take such other action reasonably requested or otherwiserequired to effect and evidence such purchase. Article VII THE CLOSING; CONDITIONS TO CLOSING Section 7.01 Closing. Subject to the closing conditions set forth in Sections 7.02 and 7.03 , and unless otherwise mutually agreed by the Parties, theclosing of the transactions contemplated under this Agreement shall take place remotely via electronic delivery of the executed TransactionDocuments and other deliverables on the Closing Date at a time to be mutually agreed. Section 7.02 Conditions Applicable to Buyer. The obligations of Buyer to effect the Closing and pay the Closing Amount pursuant to Section2.3 hereof, shall be subject to the satisfaction of the following conditions, as of the Closing Date, any of which may be waived inwriting by Buyer in its sole discretion: (a) The representations and warranties set forth in the Transaction Documents shall be true,correct and complete in all material respects on and as of the Closing Date (except that representations and warranties that refer to aspecific earlier date shall be true and correct in all material respects on such earlier date); provided , however , that if any of the foregoingrepresentations and warranties are qualified as to “materiality” or “Material Adverse Effect”, then, subject to such qualifications, suchrepresentations and warranties shall be true, correct and complete in all respects as of the applicable date; and Seller shall have confirmedthis in writing at the Closing. (b) All notices to and consents, approvals, authorizations and waivers from Third Parties andGovernmental Authorities that are required for the consummation of the transactions contemplated by this Agreement or any of theTransaction Documents (other than the Consent) shall have been obtained or provided for and shall remain in effect. (c) All of the Transaction Documents (including without limitation the Assignment butexcluding the Consent) shall have been executed and delivered by Seller to Buyer, and Buyer shall have received the same.(d) The Protective Rights Agreement shall have been duly executed and delivered by27 all the parties thereto, together with UCC-1 financing statements for filing under the UCC in Delaware, and such agreement shall be in fullforce and effect. (e) Buyer shall have received an opinion of counsel to the XOMA Entities, substantially inthe form set forth in Exhibit E . (f) Seller shall have complied in all material respects with its obligations hereunder andunder the other Transaction Documents. (g) There shall not have occurred any event or circumstance (including any developmentwith respect to the efficacy or safety of the product candidates known as DX2930 and SHP653) that could reasonably be expected to have aMaterial Adverse Effect. Section 7.03 Conditions Applicable to Seller. The obligations of Seller to effect the Closing shall be subject to the satisfaction of the following conditions, as of the ClosingDate, any of which may be waived in writing by Seller in their sole discretion: (a) The representations and warranties of Buyer set forth in the Transaction Documents shallbe true, correct and complete in all material respects on and as of the Closing Date (except that representations and warranties that refer to aspecific earlier date shall be true and correct in all material respects on such earlier date). (b) Buyer shall have complied in all material respects with its covenants set forth in theTransaction Documents. Article VIII TERMINATION Section 8.01 Termination. (a) This Agreement may be terminated, effective upon the delivery of written notice prior toor at the Closing: (i) by Buyer if any of the conditions set forth in Section 7.02 shall not havebeen satisfied as of December 31, 2016 (other than through or as a result of the failure by Buyer to comply with itsobligations under this Agreement), and Buyer has not waived such condition on or before the Closing Date; or (ii) by Seller if any of the conditions set forth in Section 7.03 shall not havebeen satisfied as of December 31, 2016 (other than through or as a result of the failure by Seller to comply with itsobligations under this Agreement), and Seller have not waived such condition on or before the Closing Date. (b) In the event that all of the Escrowed Funds are released to HCRP in accordance with theterms of the Escrow Agreement (without the Closing Amount having been released to Seller), upon receipt of the full amount thereof byBuyer, (i) the Assigned Rights shall automatically revert to Seller and (ii) the Protective Rights Agreement shall terminate and all Liensand security interests there under shall be automatically released, in each case without delivery of any instrument or performance of any actby any Person. Buyer shall execute and deliver and take such other action, at Seller’s expense, reasonably requested or otherwise requiredto effect the reversion of the Assigned Rights to Seller and evidence termination and release of any such Liens and security interests.28 Section 8.02 Effects of Expiration or Termination. (a) The expiration or termination of this Agreement for any reason shall not release any Partyfrom any obligation or liability which, at the time of such expiration or termination, has already accrued to the other Parties or which isattributable to a period prior to such expiration or termination. Accordingly, if any obligations remain unpaid or any amounts are owed orany payments are required to be made by any Party to any other Party on or after the date on which this Agreement expires or isterminated, this Agreement shall remain in full force and effect until any and all such obligations, amounts or payments have beenindefeasibly paid or made in accordance with the terms of this Agreement, and solely for that purpose. (b) Notwithstanding anything herein to the contrary, the termination of this Agreement by aParty shall be without prejudice to other remedies such Party may have at law or in equity (including any enforcement of its rights underany of the Transaction Documents) the exercise of a right of termination shall not be an election of remedies. (c) ARTICLE I and Sections 2.01(b) , 2.01(c) , 2.04 , 2 . 05 , 6.03 , 6.05(b) and 6.10(a) , thisSection 8.02 and ARTICLE IX shall survive the termination of this Agreement for any reason. Except as otherwiseprovided in this Section 8.02 , all rights and obligations of the Parties under this Agreement shall terminate uponexpiration or termination of this Agreement for any reason. Article IX MISCELLANEOUS Section 9.01 Survival. Each representation and warranty of the Parties contained herein and any certificate related to such representations andwarranties will survive the Closing and continue in full force and effect until the License Termination. Unless expressly waived pursuant tothis Agreement, no representation, warranty, covenant, right or remedy available to any Person out of or in connection with this Agreementwill be deemed waived by any action or inaction of that Person (including consummation of the Closing, any inspection or investigation, orthe awareness of any fact or matter) at any time, whether before, on or after the Closing. Section 9.02 Notices. All notices, consents, waivers and communications hereunder given by any Party to another Party shall be in writing (includingelectronic mail) and delivered personally, by electronic mail, by a recognized overnight courier, or by dispatching the same by certified orregistered mail, return receipt requested, with postage prepaid, in each case addressed: If to Buyer to: HealthCare Royalty Partners II, L.P. 300 AtlanticStreet, 6th FloorStamford, CT 06901 Attention: ClarkeB. FutchEmail: Clarke.Futch@hcroyalty.com 29 with courtesy copies (which shall not constitute notice) to: HealthCare Royalty Partners II, L.P.300 Atlantic Street, 6th Floor Stamford,CT 06901 Attention: Chief LegalOfficerEmail: royalty-legal@hcroyalty.com and: Cahill Gordon & Reindel LLP 80 PineStreetNew York, NY 10005Attention: Geoffrey E. Liebmann Email:gliebmann@cahill.com If to any XOMA Entity to: XOMA Corporation 2910Seventh StreetBerkeley, CA 94710 Attention: LegalDepartment Email:LegalDept@xoma.com with a courtesy copy to (which shall not constitute notice): Cooley LLP3175 Hanover StreetPalo Alto, CA 94304-1130Attention: Gian-Michele a Marca and Glen SatoEmail: gmamarca@cooley.com and gsato@cooley.com or to such other address or addresses as Buyer or Seller may from time to time designate by notice as provided herein. All such notices,consents, waivers and communications shall be effective upon verified receipt. Section 9.03 Successors and Assigns. The provisions of this Agreement shall be binding upon and inure to the benefit of the Parties and their respective successors andassigns. Seller shall not be entitled to assign any of its obligations and rights under the Transaction Documents without the prior writtenconsent of Buyer; provided , however , such consent shall not be required in connection with the merger or other consolidation of Seller orthe assignment of Seller’s obligations and rights by operation of law, so long as, the Person into which Seller has been merged orconsolidated or which has acquired such assets of Seller has delivered evidence to Buyer, in form and substance reasonably satisfactory toBuyer, that such Person has assumed all of Seller’s obligations under the Transaction Documents. Buyer may assign without consent ofSeller any of its rights and obligations under the Transaction Documents without restriction. Any purported assignment in violation of thisSection 9.03 shall be null and void. 30 Section 9.04 Indemnification. (a) Seller hereby indemnifies and holds each Buyer Indemnified Party harmless from andagainst any and all Losses incurred or suffered by any Buyer Indemnified Party arising out of (i) any breach of any representation, warrantyor certification made by Seller in any of the Transaction Documents, (ii) any breach of or default under any covenant or agreement bySeller pursuant to any Transaction Document or the License Agreement, including any failure by Seller to satisfy any of the ExcludedLiabilities and Obligations, or (iii) any claims asserted by any Third Party to the extent based on action taken by Buyer at the direction ofSeller pursuant to the terms of this Agreement or otherwise at the direction of Seller other than actions which Buyer would have beenobligated to take even if Buyer had not been so directed by Seller. (b) XOMA hereby indemnifies and holds each Buyer Indemnified Party harmless from andagainst any and all Losses incurred or suffered by any Buyer Indemnified Party arising out of (i) any breach of any representation, warrantyor certification made by XOMA in any of the Transaction Documents, (ii) any breach of or default under any covenant or agreement byXOMA pursuant to any Transaction Document or the License Agreement, or (iii) any claims asserted by any Third Party to the extentbased on action taken by Buyer at the direction of XOMA pursuant to the terms of this Agreement or otherwise at the direction of XOMAother than actions which Buyer would have been obligated to take even if Buyer had not been so directed by XOMA. (c) Buyer hereby indemnifies and holds Seller Indemnified Party harmless from and againstany and all Losses incurred or suffered by a Seller Indemnified Party arising out of (i) any breach of any representation, warranty orcertification made by Buyer in any of the Transaction Documents, (ii) any breach of or default under any covenant or agreement by Buyerpursuant to any Transaction Document or (iii) any claims asserted by any Third Party to the extent based on action taken by Seller at thedirection of Buyer pursuant to the terms of this Agreement or otherwise at the direction of Buyer other than actions which Seller wouldhave been obligated to take even if Seller had not been so directed by Buyer. (d) If any Claim shall be brought or alleged against an indemnified party in respect of whichindemnity is to be sought against an indemnifying party pursuant to the preceding paragraphs, the indemnified party shall, promptly afterreceipt of notice of the commencement of any such Claim, notify the indemnifying party in writing of the commencement of such Claim,enclosing a copy of all papers served, if any; provided that the omission to so notify such indemnifying party will not relieve theindemnifying party from any liability that it may have to any indemnified party under the foregoing provisions of this Section 9.04 unless,and only to the extent that, such omission results in the forfeiture of, or has a material adverse effect on the exercise or prosecution of,substantive rights or defenses by the indemnifying party. In case any such Claim is brought against an indemnified party and it notifies theindemnifying party of the commencement thereof, the indemnifying party will be entitled to participate therein and, to the extent that itmay wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel reasonably satisfactoryto such indemnified party (who shall not, except with the consent of the indemnified party, be counsel to the indemnifying party), and afternotice from the indemnifying party to such indemnified party of its election so to assume the defense thereof, the indemnifying party willnot be liable to such indemnified party under this Section 9.04 for any legal or other expenses subsequently incurred by such indemnifiedparty in connection with the defense thereof other than reasonable costs of investigation. In any such proceeding, an indemnified party shallhave the right to retain its own counsel, but the reasonable fees and expenses of such counsel shall be at the expense of such indemnifiedparty unless (i) the indemnifying party and the indemnified party shall have mutually agreed to the retention of such counsel, (ii) theindemnifying party has assumed the defense of such proceeding and has failed within a reasonable time to retain counsel reasonablysatisfactory to such indemnified party or (iii) the named parties to any such proceeding (including any impleaded parties) include both theindemnifying party and the indemnified party and representation of both such parties by31 the same counsel would be inappropriate due to actual or potential conflicts of interests between them based on the advice of such counsel.The indemnifying party shall not be liable for any settlement of any proceeding effected without its written consent, but if settled with suchconsent or if there be a final judgment for the plaintiff, the indemnifying party agrees to indemnify the indemnified party from and againstany loss or liability by reason of such settlement or judgment. No indemnifying party shall, without the prior written consent of theindemnified party, effect any settlement of any pending or threatened proceeding in respect of which any indemnified party is or couldhave been a party and indemnity could have been sought hereunder by such indemnified party, unless such settlement includes anunconditional release of such indemnified party from all liability on claims that are the subject matter of such proceeding. (e) Buyer or any Buyer Indemnified Party may take any action against Seller to enforce orrecover Losses pursuant to the indemnification obligations of Seller under this Section 9.04 without any requirement to take any action orexhaust any right or remedy against any other Person; provided that Buyer agrees that Seller shall then be subrogated to any and all otherrights of Buyer to recovery to the extent of such indemnification paid by Seller (but excluding interest amounts and withholding tax gross-up payments). If any proceeds, benefits or recoveries are received by or on behalf of a Buyer Indemnified Party with respect to Losses afterSeller has made an indemnification payment to a Buyer Indemnified Party with respect thereto and receipt of such proceeds, benefits orrecoveries prior to such payment would have reduced the amount of such indemnification payment if received prior to such payment, thensuch Buyer Indemnified Party shall hold such amounts in trust for the benefit of Seller and, within three (3) Business Days after receiptthereof, deliver such amounts (net of any applicable withholding tax) to Seller by wire transfer of immediately available funds as directedby Seller. (f) No XOMA Entity shall be liable to indemnify Buyer for any Losses arising from a breachof a representation or warranty unless and until the aggregate amount of those Losses exceeds $200,000 at which point Seller shall be liableto indemnify Buyer for all Losses arising from a breach of a representation or warranty. (g) The maximum aggregate indemnification obligation of the XOMA Entities under thisAgreement shall be an amount equal to the sum of the Closing Amount, less the aggregate amount of License Payments received by Buyerpursuant hereto. Notwithstanding the foregoing, no maximum indemnification threshold shall apply (i) for breaches of this Agreement inthe event such breach is a result of actual fraud, gross negligence or willful misconduct by any XOMA Entity or (ii) to any indemnificationfor any failure by any XOMA Entity to satisfy any of the Excluded Liabilities and Obligations. Section 9.05 Independent Nature of Relationship; Taxes. (a) The relationship between Seller, on the one hand, and Buyer, on the other hand, is solelythat of assignor and assignee, and neither Buyer, on the one hand, nor Seller, on the other hand, has any fiduciary or other specialrelationship with the other or any of their respective Affiliates. For the avoidance of doubt, nothing in this Agreement shall be read tocreate any agency, partnership, association or joint venture of Seller (or any of its Affiliates) and Buyer (or any of its Affiliates) and eachParty agrees not to refer to the other as a “partner” or the relationship as a “partnership” or “joint venture” or other kind of entity or legalform.(b) Except as otherwise contemplated herein, no Party shall at any time obligate the otherParties, or impose on any such other Party any obligation, in any manner or respect to any Third Party. (c) For United States federal, state and local tax purposes, each of Seller and Buyer shalltreat the transactions contemplated by the Transaction Documents as a sale of the Assigned Rights.32 (d) The Parties hereto agree not to take any position that is inconsistent with the provisionsof this Section 9.05 on any tax return or in any audit or other administrative or judicial proceeding unless (i) the other Parties to thisAgreement has consented to such actions, or (ii) the Party that contemplates taking such an inconsistent position has been advised bynationally recognized tax counsel in writing that it is more likely than not that (x) there is no “reasonable basis” (within the meaning ofTreasury Regulation Section 1.6662-3(b)(3)) for the position specified in this Section 9.05 or(y) taking such a position would otherwise subject the Party to penalties under the Internal Revenue Code of 1986, as amended. If aGovernmental Authority conducts an inquiry of Seller or Buyer related to this Section 9.05 , the Parties hereto shall cooperate with eachother in responding to such inquiry in a reasonable manner consistent with this Section 9.05 . (e) All payments to Buyer under this Agreement shall be made without any deduction or withholding for or onaccount of any tax as long as Buyer has delivered to Seller a properly executed IRS Form W-9 on or before the Closing Date. Buyer shallnotify Seller promptly if any information on such IRS Form W-9 ceases to be accurate. If any deduction or withholding is required fromany payment under this Agreement, the sum payable shall be increased and paid by Seller or any of their respective Affiliates as necessaryso that after all required deductions and withholdings have been made (including any deductions and withholdings attributable to Buyer’sgross up payments under this Section 9.05(e)), Buyer receives an amount equal to the amount it would have received had no suchdeductions or withholding been made, provided that Seller shall not be required to make any additional payments under this clause to theextent any withholding or deduction results from Buyer’s act or omission that causes Buyer to cease to be treated as a United States Personor that substitutes a Person that is not a United States Person for Buyer. Seller shall promptly notify Buyer in writing in the event that anydeduction or withholding is effected or proposed by Seller or any Governmental Authority, with respect to any such payments hereunderand Seller shall reasonably cooperate with Buyer if Buyer attempts to establish any available exemption from or reduction of any tax thatwould be required to withheld or deducted with respect to any such payments hereunder. Section 9.06 Entire Agreement. This Agreement, together with the Exhibits and Schedules hereto (which are incorporated herein by reference), and the otherTransaction Documents constitute the entire agreement between the Parties with respect to the subject matter hereof and supersede all prioragreements (including the Confidentiality Agreement), understandings and negotiations, both written and oral, between the Parties withrespect to the subject matter of this Agreement. Neither this Agreement nor any provision hereof (other than Section 9.04 ), is intended toconfer upon any Person other than the Parties any rights or remedies hereunder. Section 9.07 Amendments; No Waivers. (a) This Agreement or any term or provision hereof may not be amended, changed ormodified except with the written consent of all Parties. No waiver of any right hereunder shall be effective unless such waiver is signed inwriting by the Party against whom such waiver is sought to be enforced. 33 (b) No failure or delay by any Party in exercising any right, power or privilege hereundershall operate as a waiver thereof nor shall any single or partial exercise thereof preclude any other or further exercise thereof or the exerciseof any other right, power or privilege. (c) No waiver or approval hereunder shall, except as may otherwise be stated in such waiveror approval, be applicable to subsequent transactions. No waiver or approval hereunder shall require any similar or dissimilar waiver orapproval thereafter to be granted hereunder. The rights and remedies herein provided shall be cumulative and not exclusive of any rights orremedies provided by applicable law. Section 9.08 Interpretation. When a reference is made in this Agreement to Articles, Sections, Schedules or Exhibits, such reference shall be to an Article,Section, Schedule or Exhibit to this Agreement unless otherwise indicated. The words “include”, “includes” and “including” when usedherein shall be deemed in each case to be followed by the words “without limitation”. No Party shall be or be deemed to be the drafter ofthis Agreement for the purposes of construing this Agreement against one Party or another. Section 9.09 Headings and Captions. The headings and captions in this Agreement are for convenience and reference purposes only and shall not be considered a partof or affect the construction or interpretation of any provision of this Agreement. Section 9.10 Counterparts; Effectiveness. This Agreement may be executed in two or more counterparts, each of which shall be an original, but all of which together shallconstitute one and the same instrument. This Agreement shall become effective when each Party shall have received a counterpart hereofsigned by the other Parties. Any counterpart may be executed by facsimile or .pdf signature and such facsimile or .pdf signature shall bedeemed an original. Section 9.11 Severability. If any provision of this Agreement is held to be invalid or unenforceable, the remaining provisions shall nevertheless be givenfull force and effect. Any provision of this Agreement held invalid or unenforceable only in part or degree by a court of competentjurisdiction shall remain in full force and effect to the extent not held invalid or unenforceable. Section 9.12 Expenses. The XOMA Entities will be responsible for their own fees and expenses in connection with entering into and consummating thetransactions contemplated by this Agreement. Section 9.13 Governing Law; Jurisdiction. (a) This Agreement shall be governed by, and construed, interpreted and enforced inaccordance with, the laws of the State of New York, USA without giving effect to the principles of conflicts of law thereof (other thanSection 5-1401 of the General Obligations Law of the State of New York). Each Party unconditionally and irrevocably consents to theexclusive jurisdiction of the courts of the State of New York, USA located in the County of New York and the Federal district court for theSouthern District of New York located in the County of New York with respect to any suit, action or proceeding arising out of or relatingto this Agreement or the transactions contemplated hereby. Each Party hereby further irrevocably waives any objection, including anyobjection to the laying of venue or based on the grounds of forum non conveniens , which it may now or hereafter have to the bringing ofany action or proceeding in such jurisdiction in respect of any Transaction Document. (b) Each Party hereby irrevocably consents to the service of process out of any of the courtsreferred to in subsection (a) above of this Section 9.13 in any such suit, action or proceeding by the mailing of copies thereof by registeredor certified mail, postage prepaid, to it at its address set forth in this Agreement. Each Party hereby irrevocably waives any objection tosuch service of process and further irrevocably waives and agrees not to plead or claim in any suit, action or proceeding commencedhereunder or under any other Transaction Document that service of process was in any way invalid or ineffective. Nothing herein shallaffect the right of a Party to serve process on another Party in any other manner permitted by law. Section 9.14 Waiver of Jury Trial. EACH PARTY HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLELAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, PROCEEDING, CLAIM OR COUNTERCLAIMARISING OUT OF OR RELATING TO ANY TRANSACTION DOCUMENT OR THE TRANSACTIONS CONTEMPLATEDUNDER ANY TRANSACTION DOCUMENT (WHETHER BASED ON CONTRACT, TORT OR ANY OTHER THEORY).THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS ORMODIFICATIONS TO ANY TRANSACTION DOCUMENT. EACH PARTY HERETO (A) CERTIFIES THAT NOREPRESENTATIVE, AGENT OR ATTORNEY OF THE OTHER PARTY HERETO HAS REPRESENTED, EXPRESSLY OROTHERWISE, THAT THE OTHER PARTY HERETO WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TOENFORCE THE FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTY HERETO HAVEBEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS ANDCERTIFICATIONS IN THIS SECTION 9.14. [SIGNATURE PAGE FOLLOWS] IN WITNESS WH EREOF, the Parties have caused this Agreement to be duly executed by their respective authorized officers as of thedate first above written. SELLER: XOMA (US) LLCBy: /s/ James R. Neal Name: James R. NealTitle: Senior Vice President and Chief Operating Officer XOMA: XOMA CorporationBy: /s/ James R. Neal Name: James R. NealTitle: Senior Vice President and Chief Operating Officer BUYER: HealthCare Royalty Partners II, L.P.B y : HealthCare Royalty GP II, LLC, its general partner By : /s/ Clarke B. Futch Name: Clarke B. FutchTitle: Founding Managing Partner Exhibit A Form of Assignment [See attached] EXECUTION VERSION ASSIGNMENT This ASSIGNMENT (this “ Assignment ”), dated as of December 21, 2016, is made and entered into by and betweenXOMA (US) LLC (as successor in interest to XOMA Ireland Limited), a Delaware limited liability company (together with itsAffiliates, the “ Assignor ”), and HealthCare Royalty Partners II, L.P., a Delaware limited partnership (together with its Affiliates,the “ Assignee ”). All capitalized terms used and not defined herein shall have the meanings ascribed to them in the RoyaltyInterest Agreement referred to below. WHEREAS, the Assignor and the Assignee are parties to that certain Royalty Interest Acquisition Agreement, dated asof December 20, 2016 (the “ Royalty Interest Agreement ”), which relates to that certain Amended and Restated LicenseAgreement, dated effective as of October 27, 2006, between the Assignor (as successor in interest to XOMA Ireland Limited) andDYAX Corp., a Delaware corporation. WHEREAS, pursuant to the Royalty Interest Agreement, among other things, the Assignor agrees to assign, transferand convey to the Assignee, and the Assignee agrees to accept the assignment, transfer and conveyance from the Assignor of, theAssigned Rights, as that term is defined in the Royalty Interest Agreement, for consideration in the amount and on the terms andconditions provided therein; and WHEREAS, the parties now desire to carry out the purposes of the Royalty Interest Agreement by the execution anddelivery of this instrument evidencing the Assignee’s purchase and acceptance of the Assigned Rights. NOW, THEREFORE, in consideration of the foregoing premises and of other valuable consideration, the receipt andsufficiency of which are hereby acknowledged, the parties hereto hereby agree as follows: 1. Assignment of Assigned Rights . The Assignor hereby assigns, transfers and conveys to the Assigneefree and clear of all Liens (other than any Liens in favor of the Assignee), and the Assignee hereby accepts such assignment,transfer and conveyance of all of the Assignor’s right, title and interest in and to the Assigned Rights, subject to Section 2 below. 2. No Assumption of Obligations . The parties acknowledge that the Assignee is not assuming anydebt, liability or obligation of the Assignor, known or unknown, fixed or contingent, in connection with the Assigned Rights. 3. Further Assurances . Subject to the terms and conditions of the Royalty Interest Agreement, eachparty hereto will use commercially reasonable efforts to take, or cause to be taken, any and all actions and to do, or cause to bedone, any and all thing necessary under applicable laws and regulations to consummate the transactions contemplated by theRoyalty Interest Agreement and this Assignment. 4. Royalty Interest Agreement . This Assignment is entered into pursuant to and is subject in allrespects to all of the terms, provisions and conditions of the Royalty Interest Agreement, and nothing herein shall be deemed tomodify any of the representations, warranties, covenants and obligations of the parties thereunder. 5. Interpretation . In the event of any conflict or inconsistency between the terms, provisions andconditions of this Assignment and the Royalty Interest Agreement, the terms, provisions and conditions of the Royalty InterestAgreement shall govern. 6. Counterparts; Effectiveness . This Assignment may be executed in two or more counterparts, eachof which shall be an original, but all of which together shall constitute one and the same instrument. This Assignment shallbecome effective when each party hereto shall have received a counterpart hereof signed by the other party hereto. Anycounterpart may be executed by facsimile or pdf signature and such facsimile or pdf signature shall be deemed an original. 7.Governing Law; Jurisdiction; Service of Process; Waiver of Jury Trial . (a) This Assignment shall be governed by, and construed, interpreted and enforced inaccordance with, the laws of the State of New York, USA without giving effect to the principles of conflicts of law thereof (otherthan Section 5-1401 of the General Obligations Law of the State of New York). Each party hereto unconditionally and irrevocablyconsents to the exclusive jurisdiction of the courts of the State of New York, USA located in the County of New York and theFederal district court for the Southern District of New York located in the County of New York with respect to any suit, action orproceeding arising out of or relating to this Assignment or the transactions contemplated hereby. Each party hereto hereby furtherirrevocably waives any objection, including any objection to the laying of venue or based on the grounds of forum non conveniens, which it may now or hereafter have to the bringing of any action or proceeding in such jurisdiction in respect of thisAssignment. (b) Each party hereto hereby irrevocably consents to the service of process out of anyof the courts referred to in subsection (a) above of this Section 7 in any such suit, action or proceeding by the mailing of copiesthereof by registered or certified mail, postage prepaid, to it at its address set forth in this Assignment. Each party hereto herebyirrevocably waives any objection to such service of process and further irrevocably waives and agrees not to plead or claim in anysuit, action or proceeding commenced hereunder that service of process was in any way invalid or ineffective. Nothing herein shallaffect the right of a party hereto to serve process on the other party hereto in any other manner permitted by law. (c) EACH PARTY HERETO HEREBY IRREVOCABLY WAIVES, TO THEFULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANYACTION, PROCEEDING, CLAIM OR COUNTERCLAIM ARISING OUT OF OR RELATING TO THISASSIGNMENT OR THE TRANSACTIONS CONTEMPLATED HEREUNDER. THIS WAIVER SHALL APPLY TOANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THISASSIGNMENT (WHETHER BASED ON CONTRACT, TORT OR ANY OTHER THEORY). EACH PARTY HERETO(A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF THE OTHER PARTY HERETO HASREPRESENTED, EXPRESSLY OR OTHERWISE, THAT THE OTHER PARTY HERETO WOULD NOT, IN THEEVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT ITAND THE OTHER PARTY HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY,AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 7(C). [SIGNATURE PAGE FOLLOWS] Exhibit 23.1CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRMWe consent to the incorporation by reference in the Registration Statements (Form S-8 Nos. 333-108306, 333-151416, 333-171429, 333-174730, 333-181849, 333-198719, 333-204367 and 333-212238) pertaining to the 1981 Share Option Plan, the Restricted Share Plan, the 1992 Directors Share Option Plan, the Amendedand Restated 1998 Employee Stock Purchase Plan, the 2007 CEO Share Option Plan, the 2015 Employee Stock Purchase Plan and the Amended and Restated 2010Long Term Incentive and Stock Award Plan of XOMA Corporation and in the Registration Statements (Form S-3 Nos. 333-183486, 333-191078, 333-196707 and333-201882) of XOMA Corporation and the related Prospectuses, of our reports dated March 16, 2017, with respect to the consolidated financial statements ofXOMA Corporation, the effectiveness of internal control over financial reporting of XOMA Corporation, and to the reference to our firm under the captions “RiskFactors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included in this Annual Report (Form 10-K) of XOMACorporation for the year ended December 31, 2016. /s/ ERNST & YOUNG LLPRedwood City, CaliforniaMarch 16, 2017 Exhibit 31.1CERTIFICATIONI, James R. Neal, certify that:1.I have reviewed this annual report on Form 10-K of XOMA Corporation;2.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 statementsmade, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financialcondition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;4.The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in ExchangeAct 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 wehave: a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensurethat 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 inaccordance 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 effectivenessof 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 fiscalquarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and5.The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to theregistrant’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 likelyto 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 overfinancial reporting. Date: March 16, 2017 /s/ JAMES R. NEAL James R. Neal Chief Executive Officer Exhibit 31.2CERTIFICATIONI, Thomas Burns, certify that:1.I have reviewed this annual report on Form 10-K of XOMA Corporation;2.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 statementsmade, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financialcondition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;4.The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in ExchangeAct 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 wehave: a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensurethat 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 inaccordance 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 effectivenessof 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 fiscalquarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and5.The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to theregistrant’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 likelyto 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 overfinancial reporting. Date: March 16, 2017 /s/ THOMAS BURNS Thomas Burns Senior Vice President, Finance and Chief Financial Officer Exhibit 32.1CERTIFICATIONPursuant 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 63of Title 18 of the United States Code (18 U.S.C. §1350), James R. Neal, Chief Executive Officer of XOMA Corporation (the “Company”), and Thomas Burns,Senior Vice President, Finance and Chief Financial Officer of the Company, each hereby certifies that, to the best of his or her knowledge:1. The Company’s Annual Report on Form 10-K for the year ended December 31, 2016, to which this Certification is attached as Exhibit 32.1, fullycomplies with the requirements of Section 13(a) or Section 15(d) of the Exchange Act; and2. The information contained in Exhibit 32.1 fairly presents, in all material respects, the financial condition and results of operations of the Company.IN WITNESS WHEREOF, the undersigned have set their hands hereto as of the 16th day of March, 2017. /s/ JAMES R. NEAL James R. Neal Chief Executive Officer /s/ THOMAS BURNS Thomas Burns Senior 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 beincorporated 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.
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