Retrophin, Inc.
Annual Report 2017

Plain-text annual report

UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549____________________________________FORM 10-K____________________________________ þþANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the Fiscal Year Ended December 31, 2017 ¨¨Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934Commission File Number: 001-36257RETROPHIN, INC.(Exact Name of Registrant as specified in its Charter)Delaware27-4842691(State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.) 3721 Valley Centre Drive, Suite 200, San Diego CA92130(Address of Principal Executive Offices)(Zip code)760-260-8600(Registrant’s telephone number, including area code)Securities registered pursuant to Section 12(b) of the Act:Title of each className of exchange on which registeredCommon Stock, par value $0.0001 per shareThe NASDAQ Global MarketSecurities registered pursuant to Section 12(g) of the Act: NoneIndicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. þ Yes ¨ NoIndicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. ¨ Yes þ NoIndicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. þ Yes ¨ NoIndicate by check mark whether the registrant has submitted electronically and posted on its corporate Website, if any, every Interactive Data File required to be submitted andposted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).þ Yes ¨ NoIndicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’sknowledge, 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. þIndicate 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 “largeaccelerated filer,” “accelerated filer,” “smaller reporting company” and "emerging growth company" in Rule 12b-2 of the Exchange Act).Large Accelerated FilerþAccelerated Filer¨Non-Accelerated Filer¨Smaller Reporting Company¨ Emerging growth Company¨If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financialaccounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ¨Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). ¨ Yes þ NoState the aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold,or the average bid and asked price of such common equity, as of the last business day of the registrant's most recently completed second fiscal quarter. $661,868,716.The number of shares of outstanding common stock, par value $0.0001 per share, of the Registrant as of February 23, 2018 was 39,692,923.DOCUMENTS INCORPORATED BY REFERENCE: Portions of the Proxy Statement for the registrant’s Annual Meeting of Stockholders to be held May 9, 2018, to be filed within120 days after the conclusion of the registrant's fiscal year ended December 31, 2017, are incorporated by reference into Part III of this Annual Report on Form 10-K.FORM 10-K REPORT INDEX Page PART I Item 1.Business5Item 1A.Risk Factors20Item 1B.Unresolved Staff Comments39Item 2.Properties39Item 3.Legal Proceedings39Item 4.Mine Safety Disclosures39PART II Item 5.Market For Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities40Item 6.Selected Financial Data41Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations51Item 7A.Quantitative and Qualitative Disclosures About Market Risk51Item 8.Financial Statements and Supplementary Data51Item 9.Changes in and Disagreements with Accountants on Accounting and Financial Disclosure51Item 9A.Controls and Procedures51Item 9B.Other Information53PART III Item 10.Directors, Executive Officers, and Corporate Governance of the Registrant54Item 11.Executive Compensation54Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters54Item 13.Certain Relationships and Related Transactions54Item 14.Principal Accountant Fees and Services54PART IV Item 15.Exhibits and Financial Statement Schedules55Item 16.Form 10-K Summary573Table of ContentsCAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTSCertain information contained in this Annual Report on Form 10-K of Retrophin, Inc., a Delaware corporation (the “Company”) include forward-looking statements within themeaning of the Private Securities Litigation Reform Act of 1995. The statements herein which are not historical reflect our current expectations and projections about the Company’sfuture results, performance, liquidity, financial condition, prospects and opportunities and are based upon information currently available to the Company and management and issubject to its interpretation of what is believed to be significant factors affecting the businesses, including many assumptions regarding future events. Such forward-lookingstatements include statements regarding, among other things:•our ability to produce, sustain and expand sales of our products;•our ability to develop, acquire and/or introduce new products;•our projected future sales, profitability and other financial metrics;•our future financing plans;•our anticipated needs for working capital;•the anticipated trends in our industry;•acquisitions of other companies or assets that we might undertake in the future;•our operations in the United States and abroad, and the domestic and foreign regulatory, economic and political conditions; and•competition existing today or that will likely arise in the future.Forward-looking statements, which involve assumptions and describe our future plans, strategies and expectations, are generally identifiable by use of the words “may,” “should,”“expect,” “anticipate,” “estimate,” “believe,” “intend,” “seek,” or “project” or the negative of these words or other variations on these words or comparable terminology. Actualresults, performance, liquidity, financial condition and results of operations, prospects and opportunities could differ materially from those expressed in, or implied by, these forward-looking statements as a result of various risks, uncertainties and other factors, including the ability to raise sufficient capital to continue the Company’s operations. Actual events orresults may differ materially from those discussed in forward-looking statements as a result of various factors, including, without limitation, the risks outlined under “Risk Factors” andmatters described in this Annual Report generally. In light of these risks and uncertainties, there can be no assurance that the forward-looking statements contained in this AnnualReport will in fact occur. Potential investors should not place undue reliance on any forward-looking statements. Except as expressly required by the federal securities laws, there isno undertaking to publicly update or revise any forward-looking statements, whether as a result of new information, future events, changed circumstances or any other reason. The specific discussions in this Annual Report about the Company include financial projections and future estimates and expectations about the Company’s business. Theprojections, estimates and expectations are presented in this Annual Report only as a guide about future possibilities and do not represent actual amounts or assured events. All theprojections and estimates are based exclusively on the Company management’s own assessment of the business, the industry in which it works and the economy at large and otheroperational factors, including capital resources and liquidity, financial condition, fulfillment of contracts and opportunities. The actual results may differ significantly from theprojections. Potential investors should not make an investment decision based solely on the Company’s projections, estimates or expectations.4Table of ContentsPART I In this Annual Report on Form 10-K, unless the context requires otherwise, the terms “we”, “our”, “us”, “Retrophin” and the “Company” refer to Retrophin, Inc., a Delawarecorporation, as well as our direct and indirect subsidiaries.We own or have rights to various trademarks used in our business, including those referenced in the subsection of Item 1 below titled “Trademarks”. Our logos and trademarks arethe property of Retrophin, Inc. All other brand names or trademarks appearing in this report are the property of their respective holders.ITEM 1. BUSINESSThose statements in the following discussion that are not historical in nature should be considered to be forward looking statements that are inherently uncertain. Actual results andthe timing of the events may differ materially from those contained in these forward looking statements due to a number of factors, including those discussed in the “CautionaryStatement Regarding Forward-Looking Statements” and “Risk Factors” set forth elsewhere in this Annual Report.OverviewWe are a biopharmaceutical company headquartered in San Diego, California, focused on identifying, developing and delivering life-changing therapies to people living with rarediseases. Our approach centers on our pipeline, featuring clinical-stage assets and pre-clinical discovery programs targeting rare diseases with significant unmet medical needs. Ourresearch and development efforts are supported by revenues from our commercialized products, Chenodal®, Cholbam® and Thiola®. In addition we regularly evaluate and, whereappropriate, act on opportunities to expand our product pipeline through licenses and acquisitions of products in areas that will serve patients with serious or rare diseases and thatwe believe offer attractive growth characteristics.We currently have the following product candidates in clinical development:Fosmetpantotenate (RE-024)Fosmetpantotenate, also known as RE-024, is a novel small molecule that we are developing as a potential treatment for pantothenate kinase-associated neurodegeneration(“PKAN”). PKAN is a genetic neurodegenerative disorder that is typically diagnosed in the first decade of life. Consequences of PKAN include dystonia, dysarthria, rigidity, retinaldegeneration, and severe digestive problems.Sparsentan (RE-021)Sparsentan, also known as RE-021, is an investigational product candidate which acts as both a potent angiotensin receptor blocker (“ARB”), as well as a selective endothelinreceptor antagonist (“ERA”), with in vitro selectivity toward endothelin receptor type A. We have secured a license to sparsentan from Ligand Pharmaceuticals, Inc. and Bristol-Myers Squibb Company ("BMS") (who referred to it as DARA). We are developing sparsentan as a treatment for the following:•Focal segmental glomerulosclerosis ("FSGS") is a rare kidney disease characterized by proteinuria where the glomeruli become progressively scarred. FSGS is aleading cause of end-stage renal disease.•Immunoglobulin A nephropathy ("IgAN") is an immune-complex-mediated glomerulonephritis characterized by hematuria, proteinuria, and variable rates ofprogressive renal failure. IgAN is the most common primary glomerular disease.CNSA-001We have entered into a joint development agreement with Censa Pharmaceuticals Inc. ("Censa"), a privately held biotechnology company focused on developing therapies fororphan metabolic diseases, to evaluate CNSA-001 for the treatment of phenylketonuria (PKU). CNSA-001 is an orally bioavailable proprietary form of sepiapterin, a naturalprecursor of tetrahydrobiopterin (BH4) that is converted by an endogenous enzymatic pathway to BH4.In addition, we also have the following programs in discovery or development:NGLY1 Deficiency Discovery EffortsN-glycanase deficiency, or NGLY1 deficiency, is an extremely rare genetic disorder believed to be caused by a deficiency in an enzyme called N-glycanase-1, which is encoded bythe gene NGLY1. In September 2017, we entered into a three-way Cooperative Research and Development Agreement ("CRADA") with the National Institutes of Health’s NationalCenter for Advancing Translational Sciences (NCATS) and patient advocacy foundation NGLY1.org to collaborate on research efforts aimed at the identification of potential smallmolecule therapeutics for NGLY1 deficiency.Liquid Ursodeoxycholic AcidLiquid ursodeoxycholic acid ("L-UDCA") is a liquid formulation of ursodeoxycholic acid being developed for the treatment of a rare liver disease called primary biliary cholangitis("PBC"). We obtained rights to L-UDCA during 2016 with the intention of making L-UDCA commercially available to the subset of PBC patients who have difficulty swallowing.There are no liquid formulations of ursodeoxycholic acid currently approved by the FDA.5Table of ContentsWe currently sell the following three products:•Chenodal® (chenodeoxycholic acid) is approved in the United States for the treatment of patients suffering from gallstones in whom surgery poses an unacceptablehealth risk due to disease or advanced age. Chenodal® has also been the standard of care for cerebrotendinous xanthomatosis (“CTX”) patients for more than threedecades and the Company is currently pursuing adding this indication to the label.•Cholbam® (cholic acid) is approved in the United States for the treatment of bile acid synthesis disorders due to single enzyme defects and is further indicated foradjunctive treatment of patients with peroxisomal disorders.•Thiola® (tiopronin) is approved in the United States for the prevention of cystine (kidney) stone formation in patients with severe homozygous cystinuria.Our StrategyOur goal is to become a preeminent, global and fully-integrated biopharmaceutical company within the rare disease community. In order to achieve our goal, we intend to:•Focus on developing products to treat rare diseases characterized by severe unmet medical needs. We focus on potentially transformational orphan drugcandidates in order to leverage our development and commercialization capabilities in rare disease. We believe that drug development for orphan drug markets isparticularly attractive because relatively small clinical trials can demonstrate the large clinical effects expected with transformational therapies. Furthermore, the regulatoryand commercial models for orphan drugs are well established. Finally, we believe that our research, development, and commercialization capabilities are well suited to theorphan drug market and represent distinct competitive advantages.•Develop a sustainable pipeline by employing disciplined decision criteria in the evaluation of potential in-licensing candidates. We seek to build asustainable product pipeline by employing multiple therapeutic approaches and by developing or acquiring orphan drug candidates. We seek to augment our internallydeveloped pipeline projects by selectively and strategically acquiring pipeline assets that will add value to the portfolio. We intend to mitigate risk by employing rigorousdecision criteria, favoring drug candidates that have undergone at least some clinical study. Our decision to acquire rights to a drug candidate also depends on thescientific merits of the available clinical data; the identifiable orphan patient population; the economic terms of any proposed acquisition of rights; the projected amount ofcapital required to develop the drug candidate; and the economic potential of the drug candidate, should it be commercialized. We believe this strategy minimizes ourclinical development risk and allows us to accelerate the development and potential commercialization of current and future drug candidates.•Evaluate the commercialization strategies on a product-by-product basis to maximize the value of each. As we move our drug candidates throughdevelopment toward regulatory approval, we will evaluate several options for each drug candidate’s commercialization strategy. These options include utilizing orexpanding our own internal sales force; entering into joint marketing partnerships with other pharmaceutical or biotechnology companies, whereby we jointly sell andmarket the product; and out-licensing our products, whereby other pharmaceutical or biotechnology companies sell and market our product and pay us a royalty on sales.Our decision will be made separately for each product and will be based on a number of factors including capital necessary to execute on each option, size of the marketand terms of potential offers from other pharmaceutical and biotechnology companies.6Table of ContentsOur Product Candidates and Products on the Market The following table summarizes the status of our product candidates, preclinical programs and products on the market, each of which is described in further detail below.*CNSA-001 is being developed in a strategic collaboration with Censa Pharmaceuticals.**Activities underway with the intention of making a liquid formulation commercially available in the United States.Product Candidates:FosmetpantotenateWe are developing fosmetpantotenate, a novel small molecule, as a potential treatment for PKAN. PKAN is a genetic neurodegenerative disorder that is typically diagnosed in thefirst decade of life. Consequences of PKAN include dystonia, dysarthria, rigidity, retinal degeneration, and severe digestive problems. PKAN is estimated to affect up to 5,000patients worldwide. There are currently no viable treatment options for patients with PKAN. Fosmetpantotenate is a phosphopantothenate replacement therapy that aims to restorelevels of this key substrate in PKAN patients. Certain international health regulators have approved the initiation of dosing fosmetpantotenate in PKAN patients under physician-initiated studies in accordance with local regulations in their respective countries.In 2015 and 2016 we filed a U.S. Investigational New Drug application ("IND"), completed the Phase I clinical trial and obtained both orphan drug and fast track designation in theUnited States. Additionally, we received orphan drug designation in the European Union and reached an agreement with the FDA under the Special Protocol Assessment (SPA)process for a Phase 3 clinical trial for PKAN. In July 2017, the first patient was dosed in the Phase 3 FORT (FOsmetpantotenate Replacement Therapy) study and enrollmentcontinues.SparsentanSparsentan is an investigational product candidate which acts as both a potent ARB, as well as a selective ERA, with in vitro selectivity toward endothelin receptor type A. We havesecured a license to sparsentan from Ligand Pharmaceuticals, Inc. and BMS (who referred to it as DARA). We are initially developing sparsentan as a treatment for FSGS, which isa leading cause of end-stage renal disease and nephrotic syndrome (“NS”). There are currently no U.S. Food and Drug Administration (the "FDA") approved treatments for FSGSand off-label resources are limited to ACE/7Table of ContentsARBs, steroids, and immunosuppressant agents, which are effective in only a subset of patients. Every year approximately 5,400 patients are diagnosed with FSGS and weestimate that there are up to 40,000 FSGS patients in the United States with approximately half of them being candidates for sparsentan. In 2015 and 2016 we received orphandrug designation in the United States and European Union and received positive data from our Phase 2 DUET study of sparsentan for the treatment of FSGS. In 2017, we had anEnd of Phase 2 meeting with the FDA regarding the regulatory pathway for sparsentan as a treatment for FSGS, following which we confirmed our plan to conduct a single Phase3 clinical trial to serve as the basis of a New Drug Application ("NDA") filing for sparsentan for the treatment of FSGS. During 2017 and in early 2018, we had interactions with theFDA regarding the statistical modeling necessary to support the trial design's eligibility for the Subpart H accelerated approval pathway. Following these interactions, we confirmedour planned trial design. We expect that the trial will include an interim analysis of proteinuria as a surrogate endpoint and that if this interim analysis shows a substantial effect onproteinuria reduction, that the data could serve as a basis for applying for accelerated approval of sparsentan for the treatment of FSGS pursuant to Subpart H of the FDAregulations. The confirmatory endpoint of the study is expected to compare changes from baseline of estimated glomerular filtration rate, or eGFR. We expect to initiate the clinicaltrial in the second quarter of 2018.We recently announced the exploration of a second indication, IgAN, for sparsentan. IgAN is characterized by hematuria, proteinuria, and variable rates of progressive renal failure.With an estimated prevalence of up to 165,000 in the United States and more in Europe and Asia, IgAN is the most common primary glomerular disease. Most patients arediagnosed between the ages of 16 and 35, with up to 40% progressing to end stage renal disease within 15 years. There are currently no FDA approved treatments for IgAN. Thecurrent standard of care is renin-angiotensin-aldosterone system (RAAS) blockade with immunosuppression also being commonly used for patients with significant proteinuria orrapidly progressive glomerulonephritis. We expect to initiate a clinical trial of sparsentan in IgAN during 2018.CNSA-001We are a party to a joint development agreement with Censa, a privately held biotechnology company focused on developing therapies for orphan metabolic diseases, to evaluateCNSA-001 for the treatment of PKU. CNSA-001 is an orally available, natural precursor of tetrahydrobiopterin (BH4) with the potential to provide improved phenylalanine (Phe)reduction in patients with PKU when compared to BH4.Under the terms of the agreement, we are providing funding for the development of CNSA-001 in PKU. Censa is responsible for the development program, which is beingconducted under the oversight of a joint steering committee. As part of the agreement, we owe certain milestone payments upon achievement of specified milestones and we havethe exclusive option to acquire Censa upon conclusion of a specified option period, pending clinical proof of concept of CNSA-001 in PKU.PKU is a rare, genetic metabolic condition in which the body cannot breakdown Phe due to a missing or defective phenylalanine hydroxylase (PAH) enzyme. High Phe levels canlead to developmental and physical growth delay, executive function impairment, seizures, and microcephaly caused by toxic Phe accumulation in the brain. PKU is typicallydiagnosed at birth.NGLY1 Deficiency Discovery EffortsN-glycanase deficiency, or NGLY1 deficiency, is an extremely rare genetic disorder believed to be caused by a deficiency in an enzyme called N-glycanase-1, which is encoded bythe gene NGLY1. The condition is characterized by symptoms such as developmental delays, seizures, complex hyperkinetic movement disorders, diminished reflexes and aninability to produce tears. There are no approved therapeutic options for NGLY1 deficiency, and current therapeutic strategies are limited to symptom management.In September 2017, we entered into a three-way CRADA with the National Institutes of Health’s National Center for Advancing Translational Sciences (NCATS) and patientadvocacy foundation NGLY1.org to collaborate on research efforts aimed at the identification of potential small molecule therapeutics for NGLY1 deficiency.Liquid Ursodeoxycholic AcidLiquid ursodeoxycholic acid ("L-UDCA") is a liquid formulation of ursodeoxycholic acid being developed for the treatment of a rare liver disease called primary biliary cholangitis("PBC"). We obtained rights to L-UDCA during 2016 with the intention of making L-UDCA commercially available to the subset of PBC patients who have difficulty swallowing.There are no liquid formulations of ursodeoxycholic acid currently approved by the FDA.Products on the Market:Chenodal (chenodiol tablets)Chenodal is a synthetic oral form of chenodeoxycholic acid, a naturally occurring primary bile acid synthesized from cholesterol in the liver, indicated for the treatment of radiolucentstones in well-opacifying gallbladders in patients in whom selective surgery would be undertaken except for the presence of increased surgical risk due to systemic disease or age.Chenodal administration is known to reduce biliary cholesterol and the dissolution of radiolucent gallstones through suppression of hepatic synthesis of cholesterol, cholic acid anddeoxycholic acid in the bile pool. Chenodal was first approved by the FDA in 1983 for the management of gallstones but its marketing was later discontinued due to lack ofcommercial success. In 2009, Nexgen Pharma Inc.'s Abbreviated New Drug Application ("ANDA") for Chenodal was approved by the FDA for the treatment of gallstones.Chenodal is manufactured for Manchester Pharmaceuticals LLC ("Manchester") under this ANDA. Manchester subsequently obtained orphan drug designation for Chenodal forthe treatment of CTX, a rare autosomal recessive lipid storage disease, in 2010. Manchester was acquired by Retrophin in March 2014. For further discussion, see Note 3 of theConsolidated Financial Statements.8Table of ContentsWhile Chenodal is not labeled for CTX, it has been used as the standard of care for over three decades. We are working to obtain FDA approval of Chenodal for the treatment ofCTX. The prevalence of CTX is estimated in the literature to be as high as 1 in 70,000 in the overall population. Pathogenesis of CTX involves deficiency of the enzyme 27-hydroxylase (encoded by the gene CYP27A1), a rate-limiting enzyme in the synthesis of primary bile acids, including chenodeoxycholic acid ("CDCA"), from cholesterol. Thedisruption of primary bile acid synthesis in CTX leads to toxic accumulation of cholesterol and cholestanol in most tissues. Most patients present with intractable diarrhea, prematurecataracts, tendon xanthomas, atherosclerosis, and cardiovascular disease in childhood and adolescence. Neurological manifestations of the disease, including dementia andcognitive and cerebellar deficiencies, emerge during late adolescence and adulthood. Oral administration of CDCA has been shown to normalize primary bile acid synthesis inpatients with CTX.Cholbam (cholic acid capsules)The FDA approved Cholbam (cholic acid capsules) in March 2015, the first FDA approved treatment for pediatric and adult patients with bile acid synthesis disorders due to singleenzyme defects, and for adjunctive treatment of patients with peroxisomal disorders (including Zellweger spectrum disorders). The effectiveness of Cholbam has beendemonstrated in clinical trials for bile acid synthesis disorders and the adjunctive treatment of peroxisomal disorders. The estimated incidence of bile acid synthesis disorders due tosingle enzyme defects is 1 to 9 per million live births.Kolbam, the branded name of Cholbam in Europe, is indicated in Europe for the treatment of inborn errors of primary bile acid synthesis, encompassing select single enzymedefects, in infants from one month of age for continuous lifelong treatment through adulthood.Thiola (tiopronin tablets)Thiola is approved by the FDA for the treatment of cystinuria, a rare genetic cystine transport disorder that causes high cystine levels in the urine and the formation of recurringkidney stones. The resulting long-term damage can cause loss of kidney function in addition to substantial pain and loss of productivity associated with renal colic and stone passage.The prevalence of cystinuria in the United States is estimated to be 10,000 to 12,000, indicating that there may be as many as 4,000 to 5,000 affected individuals with cystinuria inthe United States that would be candidates for Thiola. We are currently developing a new, more patient-friendly, formulation for which an NDA is expected to be filed in 2018.CompetitionThe pharmaceutical and biotechnology industries are intensely competitive and subject to rapid and significant technological change. Many of our competitors are larger than ourcompany and have substantially greater financial, marketing and technical resources than we have.The development and commercialization of new products to treat orphan diseases is highly competitive, and we expect considerable competition from major pharmaceutical,biotechnology and specialty pharmaceutical companies. As a result, there are, and will likely continue to be, extensive research and substantial financial resources invested in thediscovery and development of new orphan drug products.Our competition will be determined in part by the potential indications for which drugs are developed and ultimately approved by regulatory authorities. The speed with which we candevelop products, complete pre-clinical testing, clinical trials, approval processes, and supply commercial quantities to market are expected to be important competitive factors. Weexpect that competition among products approved for sale will be based on various factors, including product efficacy, safety, reliability, availability, price, reimbursement, patentposition, and regulatory exclusivity.ChenodalStatins lower cholesterol and have been studied as a treatment for CTX, however, statins deplete CoQ10 and thereby alter mitochondrial function, which is a theoretical concernbecause abnormal mitochondrial metabolism has been reported in CTX. Although data is sparse, statin monotherapy appears to have little or no benefit for CTX. However, statinsmay be useful for lowering cholestanol levels when combined with CDCA, and there is limited evidence that they provide additional clinical benefit over CDCA treatment alone.CholbamThere are currently no FDA approved treatments in the United States that compete with Cholbam.ThiolaD-penicillamine is the only other prescription medication FDA approved for the treatment of cystinuria. D-penicillamine forms a penicillamine-cysteine disulfide complex that is 50times more soluble than cystine. In uncontrolled trials and observational studies, penicillamine decreases stone size or dissolves stones in up to 75 percent of patients. The use of D-penicillamine is often limited by a relatively high incidence of side effects, such as fever, rash, abnormal taste, arthritis, leukopenia, aplastic anemia, hepatotoxicity, and pyridoxine(vitamin B6) deficiency. In addition, patients treated with penicillamine may develop proteinuria (usually due to membranous nephropathy), typically within the first 6 to 12 months oftherapy, or, less commonly, crescentic glomerulonephritis. Given the high incidence of side effects, drug therapy may be discontinued once stones are no longer present. Additionalcourses can be given if stones recur. If penicillamine is to be used long term, pyridoxine supplementation (50 mg/day) is required.Captopril is not FDA approved for the treatment of cystinuria but has been prescribed for patients with cystinuria. The proportion of orally administered captopril that appears in theurine is low. Thus, the doses of captopril required to reduce cystine excretion (more than 150 mg/day) may not be tolerated because of hypotension. In addition, the efficacy ofcaptopril as a treatment for cystinuria remains unproven. Thus, its use is typically limited to patients who cannot tolerate other cystine-binding agents.In 2016, Imprimis Pharmaceuticals, Inc., a specialty pharmaceutical company, announced plans to introduce a compounded form of tiopronin, the active ingredient in Thiola, incombination with potassium citrate. Compounded therapies are not subjected to the same level of safety and efficacy9Table of Contentsevaluation and may not offer the same therapeutic outcome for patients. There is no clinical data to support the compatibility of fixed dosing of tiopronin with potassium citrate.Fixed-dose combinations of therapies containing potassium are generally avoided due to the potential for fluctuations in serum potassium, which may cause serious adverseoutcomes including cardiac events.Revive Therapeutics is developing bucillamine, a dithiol derivative of tiopronin for the treatment of cystinuria. The FDA has granted orphan designation status for the use ofbucillamine for the treatment of cystinuria.FosmetpantotenateThere are currently no FDA approved treatments for PKAN.SparsentanThere are currently no pharmacological treatments approved by the FDA for FSGS or IgAN in Europe or the United States. For FSGS the current standard of care includessteroids, ACE/ARBs, calcineurin inhibitors, dialysis, and renal transplant. For IgAN, the current standard of care is renin-angiotensin-aldosterone system (RAAS) blockade withimmunosuppression also being commonly used in patients with significant proteinuria or rapidly progressive glomerulonephritis.Based on industry reports, Complexia Inc., Astellas Pharma Inc., Genetech Inc., Bristol-Myers Squibb, and Reata Pharmaceuticals may have programs in clinical development forthe treatment of FSGS.Based on industry reports, Anthera Pharmaceuticals, Astellas Pharma Inc., Chemocentryx, EMD Serono and Merck KGaA, Mallinckrodt, Omeros Corporation, ReataPharmaceuticals, Rigel Pharmaceuticals and Chong Kun Dang Pharmaceuticals Group Co. LTD may have programs in clinical development for the treatment of IgAN.CNSA-001We have the option to purchase Censa, which owns CNSA-001. The current competitive landscape for CNSA-001 is as follows:Sapropterin dihydrochloride, known as Kuvan®, which is marketed by Biomarin Pharmaceuticals, is the first and only FDA-approved medication for PKU to reduce blood Phe levelsin patients with hyperphenylalaninemia (HPA) due to BH4 responsive PKU. Sapropterin dihydrochloride is approved in the United States, European Union, Canada, and Japan.Pegylated recombinant phenylalanine ammonia lyase, known as Pegvaliase®, which is being developed by Biomarin Pharmaceuticals, is an investigational enzyme substitutiontherapy which is administered via a subcutaneous injection, and is currently being studied in ongoing Phase 3 clinical trials. The treatment has designated orphan drug status in theUnited States and the European Union.Liquid Ursodeoxycholic AcidAlso known as ursodiol or UDCA, ursodeoxycholic acid is a naturally occurring hydrophilic bile acid derived from cholesterol, which is indicated for the treatment of PBC andcurrently prescribed only in solid forms. Introducing a liquid formulation of ursodeoxycholic acid would provide healthcare professionals with a dosing alternative for patients whohave difficulty swallowing tablets or capsules, and may facilitate increased compliance. Currently the only liquid form of UDCA is from compounding pharmacies who make it at aphysician's request for individual prescriptions.Exclusive option to purchase CensaOn December 16, 2017, we entered into a Future Acquisition Right and Joint Development Agreement with Censa, which became effective on January 4, 2018 upon thesatisfaction of certain conditions. Pursuant to the agreement, we agreed to fund certain development activities of Censa’s CNSA-001 program, in an aggregate amount expected tobe approximately $16 million through proof of concept, and have the right, but not the obligation, to acquire Censa (the “Option”) on the terms and subject to the conditions set forthin a separate Agreement and Plan of Merger (the “Merger Agreement”). In exchange for the Option, in January 2018, we paid Censa $10 million, $9 million of which wasdistributed to Censa’s equityholders, and are required to pay Censa an additional $5 million upon Censa’s completion of a specified development milestone set forth in the OptionAgreement, all of which will be distributed to Censa’s equityholders.If we exercise the Option, pursuant to the terms of the Merger Agreement, we will acquire Censa for $65 million in upfront consideration, subject to certain adjustments, paid as acombination of 20% in cash and 80% in shares of our common stock, valued at a fixed price of $21.40 per share; provided, however, that Censa may elect on behalf of itsequityholders to receive the upfront consideration in 100% cash if the average price per share of our common stock for the ten trading days ending on the date we provide a noticeof interest to exercise the Option is less than $19.26. In addition to the upfront consideration, if we exercise the Option and acquire Censa, we would be required to make furthercash payments to Censa’s equityholders of up to an aggregate of $25 million if the CNSA-001 program achieves specified development and commercial milestones.Acquisition of Liquid Ursodeoxycholic Acid (L-UDCA)In June 2016, we entered into an asset purchase agreement with Asklepion Pharmaceuticals, LLC (“Asklepion”) to purchase Asklepion's rights, titles and ownership of a liquidformulation of ursodeoxycholic acid.Acquisition of Cholbam (cholic acid)In 2015, we acquired from Asklepion all of Asklepion's rights, titles, and ownership of Cholbam (cholic acid) for the treatment of bile acid synthesis disorders.10Table of ContentsSale of Asset to SanofiIn July 2015, we sold and transferred a pediatric priority review voucher ("PRV") to Sanofi for $245.0 million. $150.0 million was received upon closing, and $47.5 million was due oneach of the first and second anniversaries of the closing. All payments have been received in accordance with the terms of the agreement.Licenses and RoyaltiesLigand License AgreementIn 2012, we entered into a license agreement with Ligand Pharmaceuticals, Inc. ("Ligand"), granting us a worldwide license for the development, manufacture andcommercialization of sparsentan, which we are initially developing in connection with the treatment of FSGS. Under the license agreement, Ligand granted us a sublicense undercertain of its patents and other intellectual property in connection with the development and commercialization of sparsentan. Under the license agreement, Ligand is obligated totransfer to us certain information, records, regulatory filings, materials and inventory controlled by Ligand and relating to or useful for developing sparsentan. We must usecommercially reasonable efforts to develop and commercialize sparsentan in specified major market countries and other countries in which we believe it is commercially reasonableto develop and commercialize such products.As consideration for the license, we are required to make payments upon the achievement of certain milestones, totaling up to $109.4 million. Should we commercialize sparsentanor any products containing any of the licensed compounds, we will be obligated to pay Ligand an escalating annual royalty between 15% and 17% of net sales of all such products.Through 2017, we have made milestone payments to Ligand of $2.6 million under the terms of the license agreement.Under the terms of the license agreement, BMS has a right of first negotiation and Ligand has a right of second negotiation with respect to any license arrangement for a licensedcompound except to the extent such rights may be waived.The license agreement will continue until neither party has any further payment obligations under the agreement and is expected to continue for approximately 10 to 20 years fromthe effective date. Ligand may terminate the license agreement due to (i) our insolvency, (ii) our material uncured breach of the agreement, (iii) our failure to use commerciallyreasonable efforts to develop and commercialize sparsentan as described above or (iv) certain other conditions. We may terminate the license agreement due to a material uncuredbreach of the agreement by Ligand.Thiola License AgreementIn 2014, we entered into a license agreement with Mission Pharmacal Company ("Mission"), pursuant to which we obtained an exclusive, royalty-bearing license to market, sell andcommercialize Thiola (Tiopronin) in the United States and Canada, and a non-exclusive license to use know-how relating to Thiola to the extent necessary to market Thiola. Wepaid Mission an up-front license fee of $3.0 million and through June 30, 2024 will pay guaranteed minimum royalties during each calendar year the greater of $2.0 million or 20% ofour net sales of Thiola.In October 2015, the license agreement was amended to allow for us to secure enough active pharmaceutical ingredient ("API") to ensure an adequate level of safety stock toprevent an interruption in the supply of Thiola and to prepare for a reformulation development project.In March 2016, the license agreement was amended to, among other things, include a new formulation development project for tiopronin tablets.In November 2017, the license agreement was amended to extend the license term, at a minimum, through May 2029.Intellectual PropertyThe proprietary nature of, and protection for, our product candidates and our discovery programs, processes and know-how are important to our business. We have sought patentprotection in the United States and certain other jurisdictions for sparsentan and fosmetpantotenate, where available and when appropriate. Our policy is to pursue, maintain anddefend patent rights, whether developed internally or licensed from third parties, and to protect the technology, inventions and improvements that are commercially important to thedevelopment of our business. We also rely on trade secrets relating to our proprietary technology that may be important to the development of our business.Our commercial success will depend in part on obtaining and maintaining patent protection and trade secret protection for our current and future product candidates and themethods used to develop and manufacture them, as well as successfully defending these patents against third-party challenges. Our ability to stop third parties from making, using,selling, offering to sell, or importing our products depends on the extent to which we have rights under valid and enforceable patents or trade secrets that cover these activities. Wecannot be sure that patents will be granted with respect to any of our pending patent applications or with respect to any patent applications filed by us in the future, nor can we besure that any of our existing patents or any patents that may be granted to us in the future will be commercially useful in protecting our product candidates, discovery programs andprocesses.FosmetpantotenateOur patent portfolio covering compounds for the treatment of PKAN is comprised of five Retrophin-owned patent families. The first of these patent families includes patents andpatent applications directed to fosmetpantotenate and structural analogs thereof, pharmaceutical compositions containing fosmetpantotenate (RE-024) or analogs thereof, andmethods of using fosmetpantotenate or analogs thereof in the treatment of PKAN. As of December 31, 2017, this patent family included three U.S. patents (U.S. PatentNo. 8,673,883, issued March 18, 2014, which we refer to herein as the ‘883 patent, U.S. Patent No. 9,181,286, issued November 10, 2015, and U.S. Patent No. 9,629,862, issuedApril 25, 2017), and one pending U.S. patent application (Application Serial No. 15/789,494, filed October 20, 2017). In addition, as of December 31, 2017 this patent familyincluded a granted European patent11Table of Contents(European Patent No. EP2841438, which we refer to herein as the European ‘438 patent), a granted Chinese patent and corresponding foreign patent applications pending inAustralia, Brazil, Canada, China, Europe, Hong Kong, India, Japan, Korea, Mexico, and Russia. We expect the U.S. and foreign patents in this patent family to expire in April 2033.Our second PKAN patent family is directed to a chemical genus that encompasses structural analogs of fosmetpantotenate, but not fosmetpantotenate itself. As of December 31,2017, this patent family was comprised of a pending U.S. patent application and a pending European patent application. We expect any U.S. or foreign patent granted from thispatent family to expire in October 2034.Our third PKAN patent family is directed to another chemical genus that encompasses structural analogs of fosmetpantotenate, but not fosmetpantotenate itself. As of December31, 2017, this patent family was comprised of an international patent application filed in 2016.Our fourth PKAN patent family also is directed to a chemical genus that encompasses structural analogs of fosmetpantotenate, but not fosmetpantotenate itself. As of December 31,2017, this patent family was comprised of an international patent application filed in 2017.Our fifth PKAN patent family also is directed to a pharmaceutical formulation of fosmetpantotenate. As of December 31, 2017, this patent family was comprised of two U.S.provisional patent applications filed in 2017.It is possible, assuming that fosmetpantotenate achieves regulatory approval and depending upon the date of any such approval, that the term of the ‘883 patent may be extendedunder the provisions of the Hatch-Waxman Act. Patent term extension also may be available in certain foreign jurisdictions upon regulatory approval. Likewise, it is possible,assuming that sparsentan achieves regulatory approval in Europe and depending upon the date of any such approval, that the term of the European ‘438 patent may be extendedin various European countries under the provisions governing Supplementary Protection Certificates (SPCs). Should we commercialize fosmetpantotenate, we may be obligated topay royalties of up to 5% of net sales of all such products.SparsentanOur patent portfolio for sparsentan is comprised of three distinct patent families, two of which are exclusively licensed from Ligand. One of the licensed patent families is owned byBMS, which exclusively licensed it to Ligand (the “BMS patent family”), and the other is owned by Ligand (the “Ligand patent family”). The third patent family is owned by Retrophin(the "Retrophin patent family").The BMS patent family is directed to sparsentan and structural analogs thereof, and to pharmaceutical compositions containing sparsentan or a structural analog thereof. As ofDecember 31, 2017, this patent family included three U.S. patents (U.S. Patent Nos. 6,638,937, which we refer to herein as the ‘937 patent; 6,835,741; and 6,852,745), of whichone (U.S. Patent No. 6,638,937) claims sparsentan and pharmaceutical compositions that contain sparsentan. In addition, as of December 31, 2017, this patent family included agranted European patent and a granted Chinese patent. With the exception of the ‘937 patent, which the U.S. Patent and Trade Office ("USPTO") has determined is entitled to 175days of patent term adjustment, we expect all U.S. and foreign patents in this patent family to expire in July 2019. In view of the USPTO determination that the ‘937 patent is entitledto 175 days of patent term adjustment, we expect the ‘937 patent to expire in December 2019.The Ligand patent family is directed to methods of using sparsentan in the treatment of various diseases, including glomerulosclerosis and IgA nephropathy. As of December 31,2017, this patent family included a U.S. patent (U.S. Patent No. No. 9,662,312, which refer to herein as the ‘312 patent), a pending U.S. application (Application SerialNo. 15,687,407, filed August 25, 2017), a European patent (European Patent No. EP2732818, which we refer to herein as the European ‘818 patent), a pending Europeanapplication, and corresponding applications pending in China, Hong Kong and Japan. The ‘312 patent and the European ‘818 patent claim the use of sparsentan for treatingglomerulosclerosis. We expect the U.S. and foreign patents in this patent family to expire in March 2030.The Retrophin patent family consists of an international patent application (i.e., a PCT application) filed in 2017.It is possible, assuming that sparsentan achieves regulatory approval and depending upon the date of any such approval, that the term of the ‘312 patent may be extended underthe provisions of the Hatch-Waxman Act. Patent term extension also may be available in certain foreign jurisdictions upon regulatory approval. Likewise, it is possible, assuming thatsparsentan achieves regulatory approval in Europe and depending upon the date of any such approval, that the term of the European ‘818 patent may be extended in variousEuropean countries under the provisions governing Supplementary Protection Certificates (SPCs).Regulatory ExclusivityIf we obtain marketing approval for sparsentan, fosmetpantotenate, CENSA-001 or other drug candidates in the United States or in certain jurisdictions outside of the United States,we may be eligible for regulatory exclusivity. For example, in the United States, an FDA approved product may be eligible to receive five years of new chemical entity exclusivity or,for drugs granted an orphan designation by the FDA, seven years of orphan drug exclusivity. In Europe a new drug product approved by the EMA may receive eight years of dataexclusivity and up to 11 years of marketing exclusivity or, in the case of orphan drugs, ten years of data exclusivity. There can be no assurance that we will qualify for any suchregulatory exclusivity, or that any such exclusivity will prevent competitors from seeking approval solely on the basis of their own studies. See “Government Regulation” below.ChenodalChenodal received orphan drug designation in the United States for the treatment of CTX in 2010. Consequently, if Chenodal gains FDA approval for the treatment of CTX, weexpect it will have 7 years of marketing exclusivity in the United States for that indication.12Table of ContentsCholbam (Kolbam)Cholbam received orphan drug designation in the United States for the treatment for pediatric and adult patients with bile acid synthesis disorders due to single enzyme defects andfor patients with peroxisomal disorders, and therefore is expected to have marketing exclusivity in the U.S. for these indications until March 2022.Kolbam, the branded name of Cholbam in Europe, received marketing authorization in November 2015 from the EMA for the treatment of inborn errors of primary bile acidsynthesis, encompassing select single enzyme defects. We expect Kolbam to have marketing exclusivity in Europe for these indications until September 2024.ThiolaThiola does not have regulatory exclusivity in the United States.TrademarksOur trademark portfolio includes both Retrophin-owned and Retrophin-licensed trademarks and is comprised of various U.S. and foreign registered trademarks and pendingtrademark applications relating to our company name, our commercial products (Thiola, Chenodal and Cholbam/Kolbam), and two of our product candidates (i.e. sparsentan andL-UDCA).More specifically, our trademark portfolio includes a registered U.S. trademark and U.S. and foreign trademark applications for the mark “RETROPHIN”, one U.S. trademarkapplication directed to the Retrophin logo, one registered U.S. trademark and one registered Canadian trademark for the mark “CHENODAL”, one registered U.S. trademarkdirected to the Chenodal logo, one registered U.S. trademark for the mark “MANCHESTER PHARMACEUTICALS”, one U.S. trademark application for the mark “KEEP ITBELOW THE LINE”, a registered U.S. trademark and foreign trademark applications for the mark “CHOLBAM”, a registered European Community trademark for the mark“KOLBAM”, a registered U.S. trademark for the mark “TOTAL CARE HUB”, a U.S. trademark application directed to the Total Care Hub logo, a U.S. trademark applicationdirected to a leaves logo, U.S. and foreign registered trademarks and pending applications related to sparsentan, and U.S. trademark applications relating to L-UDCA. In addition,under our license agreement with Mission we have an exclusive license to use Mission’s three registered U.S. trademarks and one registered Canadian trademark for the mark“THIOLA”.Trade SecretsIn addition to patents, we rely on trade secrets and know-how to develop and maintain our competitive position. We seek to protect our proprietary data and processes, in part, byconfidentiality agreements and invention assignment agreements with our employees, consultants, scientific advisors, contractors, and partners. These agreements are designed toprotect our proprietary information. We also seek to preserve the integrity and confidentiality of our data, trade secrets and know-how by maintaining physical security of ourpremises and physical and electronic security of our information technology systems. Trade secrets and know-how can be difficult to protect. Consequently, we anticipate that tradesecrets and know-how will, over time, be disseminated within the industry through independent development, the publication of journal articles, and the movement of personnelskilled in the art from academic to industry scientific positions.ManufacturingNexgen Pharma manufactures Chenodal, New Zealand Pharma manufactures the active pharmaceutical ingredient for Cholbam, Patheon Inc. formulates and packages Cholbam,and Mission manufactures Thiola.We intend to continue to use our financial resources to accelerate development of our drug candidates rather than diverting resources to establish our own manufacturing facilities.We intend to meet our pre-clinical and clinical trial manufacturing requirements by establishing relationships with third-party manufacturers and other service providers to performthese services for us. Should any of our drug candidates obtain marketing approval, we anticipate establishing relationships with third-party manufacturers and other service providers in connection withthe commercial production of our products. We have some flexibility in securing other manufacturers to produce our drug candidates; however, our alternatives may be limited dueto proprietary technologies or methods used in the manufacture of some of our drug candidates.Sales, Marketing and DistributionDuring fiscal 2017, we continued to utilize our specialty sales force to market our products. In order to commercialize our clinical drug candidates if and when they are approved forsale in the United States or elsewhere, we will need to increase our marketing, sales and distribution capabilities.CommercializationThrough deep understanding of patient and healthcare provider needs, we believe we are able to:•serve patients living with rare disease that have limited treatment options;•drive optimum performance of our marketed products;•educate and train healthcare providers about our products and the diseases for which they are approved to treat;•support access to and reimbursement coverage for our products in the U.S. without significant restrictions; and13Table of Contents•minimize the number of patients who discontinue treatment or have low compliance with our products by providing patients with support services and disease education,to the extent and in the manner permitted under applicable laws, to help them maximize the benefits of treatment.Our U.S. commercial initiatives are designed to support patients living with rare diseases and clinicians treating these patients. We believe that it is possible to commercialize ourproducts in the U.S. with a relatively small specialty sales force. The primary call points for Thiola include urologists and nephrologists. The primary call points for Cholbam aregastroenterologists, hepatologists, and metabolic specialists. We do not promote Chenodal with our sales force.Our sales force is differentiated by its high level of experience, averaging more than 15 years in pharmaceutical sales including over five years of experience in rare disease. Ourcommercial management and operations team has an average of more than 15 years of pharmaceutical experience focused on specialty and rare disease.Our small marketing team, supported by third-party agencies with rare disease experience, drives our commercialization and disease awareness efforts in the U.S. and countrieswhere our products may be approved or available through named patient sales. Specifically, we implement a variety of marketing programs to educate physicians, including direct-to-physician contact by sales representatives, peer-to-peer educational programs, and participation in targeted medical convention programs.We distribute our products through one direct to patient pharmacy, Dohmen Life Science Services, who also provides our comprehensive patient support services (i.e., the TotalCare Hub). This patient support program (for all U.S. commercial products) includes a case-managed approach to patient education, insurance verification and reimbursementsupport, co-pay and other financial assistance for eligible patients, monitoring and support of adherence, and 24/7 access to pharmacist counseling.Outside the U.S., including in the EU, we plan to continue to partner with local distributors and certain field based personnel as necessary to conduct permitted commercial activities.Our near-term efforts are focused on securing pricing and reimbursement approval for Kolbam.Medical AffairsWe have a medical affairs team in the U.S. which supports independent medical education programs and investigator-initiated studies by providing education and financial grants ina number of medical and disease-related areas. The responsibilities of medical affairs personnel also include providing education through the dissemination of medical informationand publications, providing support in connection with our post-approval clinical commitments, and assisting in organizing scientific and medical advisory boards to obtain input fromexperts and practitioners on medical topics relevant to our products and diseases.Government RegulationRegulation by government authorities in the United States and foreign countries is a significant factor in the development, manufacture and marketing of our proposed products andin our ongoing research and product development activities. All of our products will require regulatory approval by government agencies prior to commercialization. In particular,human therapeutic products are subject to rigorous preclinical studies and clinical trials and other approval procedures of the FDA and similar regulatory authorities in foreigncountries. Various federal and state statutes and regulations also govern or influence testing, manufacturing, safety, labeling, storage and record-keeping related to such productsand their marketing. The process of obtaining these approvals and the subsequent compliance with appropriate federal and state statutes and regulations require the expenditureof substantial time and financial resources. FDA Drug Approval ProcessIn the United States, pharmaceutical products are subject to extensive regulation by the FDA. The Federal Food, Drug, and Cosmetic Act, and other federal and state statutes andregulations, govern, among other things, the research, development, testing, manufacture, storage, recordkeeping, approval, labeling, promotion and marketing, distribution, post-approval monitoring and reporting, sampling and import and export of pharmaceutical products. Failure to comply with applicable U.S. requirements may subject a company to avariety of administrative or judicial sanctions, such as FDA refusal to approve pending new drug applications, or NDAs, warning or untitled letters, product recalls, product seizures,total or partial suspension of production or distribution, injunctions, fines, civil penalties and criminal prosecution.We cannot market a drug product candidate in the United States until the drug has received FDA approval. The steps required before a drug may be marketed in the United Statesgenerally include the following:•completion of extensive pre-clinical laboratory tests, animal studies, and formulation studies in accordance with the FDA’s GLP regulations;•submission to the FDA of an IND for human clinical testing, which must become effective before human clinical trials may begin;•performance of adequate and well-controlled human clinical trials in accordance with Good Clinical Practices ("GCP") requirements to establish the safety and efficacy ofthe drug for each proposed indication;•submission to the FDA of an NDA after completion of all pivotal clinical trials;14Table of Contents•satisfactory completion of an FDA pre-approval inspection of the manufacturing facility or facilities at which the active pharmaceutical ingredient, or API, and finished drugproduct are produced and tested to assess compliance with current Good Manufacturing Practices ("cGMPs"); and•FDA review and approval of the NDA prior to any commercial marketing or sale of the drug in the United States.Satisfaction of FDA pre-market approval requirements typically takes many years and the actual time required may vary substantially based upon the type, complexity and novelty ofthe product or disease.Preclinical tests include laboratory evaluation of product chemistry, formulation and toxicity, as well as animal trials to assess the characteristics and potential safety and efficacy ofthe product. The conduct of the preclinical tests must comply with federal regulations and requirements, including good laboratory practices. The results of preclinical testing aresubmitted to the FDA as part of an IND along with other information, including information about product chemistry, manufacturing and controls and a proposed clinical trialprotocol. Long term preclinical tests, such as animal tests of reproductive toxicity and carcinogenicity, may continue after the IND is submitted.A 30-day waiting period after the submission of each IND is required prior to the commencement of clinical testing in humans. If the FDA has neither commented on nor questionedthe IND within this 30-day period, the clinical trial proposed in the IND may begin. If the FDA raises concerns or questions about the conduct of the trial, such as whether humanresearch subjects will be exposed to an unreasonable health risk, the IND sponsor and the FDA must resolve any outstanding FDA concerns or questions before clinical trials canproceed.Clinical trials involve the administration of the investigational new drug to healthy volunteers or patients under the supervision of a qualified investigator. Clinical trials must beconducted in compliance with federal regulations, including GCP requirements, as well as under protocols detailing the objectives of the trial, the parameters to be used inmonitoring safety and the effectiveness criteria to be evaluated. Each protocol and subsequent protocol amendments must be submitted to the FDA as part of the IND.The FDA may order the temporary, or permanent, discontinuation of a clinical trial at any time, or impose other sanctions, if it believes that the clinical trial either is not beingconducted in accordance with FDA requirements or presents an unacceptable risk to the clinical trial patients. The study protocol and informed consent information for patients inclinical trials must also be submitted to an institutional review board, or IRB, for approval at each site at which the clinical trial will be conducted. An IRB may also require the clinicaltrial at the site to be halted, either temporarily or permanently, for failure to comply with the IRB’s requirements, or may impose other conditions.Clinical trials to support NDAs for marketing approval are typically conducted in three sequential phases, but the phases may overlap. In Phase 1, the initial introduction of the druginto healthy human subjects or patients, the drug is tested to assess pharmacological actions, side effects associated with increasing doses and, if possible, early evidence oneffectiveness. Phase 2 usually involves trials in a limited patient population to determine metabolism, pharmacokinetics, the effectiveness of the drug for a particular indication,dosage tolerance and optimum dosage, and to identify common adverse effects and safety risks. If a compound demonstrates evidence of effectiveness and an acceptable safetyprofile in Phase 2 evaluations, Phase 3 clinical trials, also called pivotal trials, are undertaken to obtain the additional information about clinical efficacy and safety in a larger numberof patients, typically at geographically dispersed clinical trial sites, to permit the FDA to evaluate the overall benefit-risk relationship of the drug and to provide adequate informationfor the labeling of the drug. In most cases the FDA requires two adequate and well controlled Phase 3 clinical trials to demonstrate the efficacy of the drug. A single Phase 3 clinicaltrial with other confirmatory evidence may be sufficient in rare instances where the study is a large multicenter trial demonstrating internal consistency and a statistically verypersuasive finding of a clinically meaningful effect on mortality, irreversible morbidity or prevention of a disease with a potentially serious outcome and confirmation of the result in asecond trial would be practically or ethically impossible.After completion of the required clinical testing, an NDA is prepared and submitted to the FDA. FDA approval of the NDA is required before marketing of the product may begin inthe United States. The NDA must include the results of all preclinical, clinical and other testing and a compilation of data relating to the product’s pharmacology, chemistry,manufacture and controls. The cost of preparing and submitting an NDA is substantial. The submission of most NDAs is additionally subject to a substantial application user fee, andthe sponsor of an approved NDA is also subject to an annual program user fee. These fees are typically increased annually.The FDA has 60 days from its receipt of an NDA to determine whether the application will be accepted for filing based on the agency’s threshold determination that it is sufficientlycomplete to permit substantive review. Once the submission is accepted for filing, the FDA begins an in-depth review. The FDA has agreed to certain performance goals in thereview of NDAs. Most such applications for standard review drug products are reviewed within 10 months of filing; most applications for priority review drugs are reviewed withineight months of filing. Priority review can be applied to drugs to treat serious conditions that the FDA determines offer significant improvement in safety or effectiveness. The reviewprocess for both standard and priority review may be extended by the FDA for three additional months to consider certain late-submitted information, or information intended toclarify information already provided in the submission.The FDA may also refer applications for novel drug products, or drug products that present difficult questions of safety or efficacy, to an advisory committee—typically a panel thatincludes clinicians and other experts—for review, evaluation and a recommendation as to whether the application should be approved. The FDA is not bound by therecommendation of an advisory committee, but it generally follows such recommendations. Before approving an NDA, the FDA will typically inspect one or more clinical sites toassure compliance with GCPs. Additionally, the FDA will inspect the facility or the facilities at which the drug is manufactured. The FDA will not approve the product unlesscompliance with cGMPs is satisfactory and the NDA contains data that provide substantial evidence that the drug is safe and effective in the indication studied.After the FDA evaluates the NDA and the manufacturing facilities, it issues either an approval letter or a complete response letter. A complete response letter generally outlines thedeficiencies in the submission and may require substantial additional testing, or information, in order for the15Table of ContentsFDA to reconsider the application. If, or when, those deficiencies have been addressed to the FDA’s satisfaction in a resubmission of the NDA, the FDA will issue an approval letter.The FDA has committed to reviewing such resubmissions in two or six months depending on the type of information included.An approval letter authorizes commercial marketing of the drug with specific prescribing information for specific indications. As a condition of NDA approval, the FDA may requirerisk evaluation and mitigation strategies ("REMS") to ensure that the benefits of the drug outweigh the potential risks. REMS can include a medication guide, a communication planfor healthcare professionals and elements to assure safe use, such as special training and certification requirements for individuals who prescribe or dispense the drug,requirements that patients enroll in a registry and other measures that the FDA deems necessary to assure the safe use of the drug. The requirement for REMS can materiallyaffect the potential market and profitability of the drug. Moreover, product approval may require substantial post-approval testing and surveillance to monitor the drug’s safety orefficacy. Once granted, product approvals may be withdrawn if compliance with regulatory standards is not maintained or problems are identified following initial marketing.Changes to some of the conditions established in an approved application, including changes in indications, labeling, or manufacturing processes or facilities, require submission andFDA approval of a new NDA or NDA supplement before the change can be implemented. An NDA supplement for a new indication typically requires clinical data similar to that inthe original application, and the FDA uses the same procedures and actions in reviewing NDA supplements as it does in reviewing NDAs. Such supplements are typically reviewedwithin 10 months of receipt.Orphan DrugsUnder the Orphan Drug Act, the FDA may grant orphan drug designation to drugs intended to treat a rare disease or condition—generally a disease or condition that affects fewerthan 200,000 individuals in the U.S. Orphan drug designation must be requested before submitting an NDA. After the FDA confers orphan drug status, the generic identity of thedrug and its potential orphan indication are disclosed publicly by the FDA. Orphan drug designation in and of itself does not convey any advantage in, or shorten the duration of, theregulatory review and approval process. The first NDA applicant to receive FDA approval for a particular active ingredient to treat a particular indication with FDA orphan drugdesignation is entitled to a seven-year exclusive marketing period in the U.S. for that product, for that indication. During the seven-year exclusivity period, the FDA may not approveany other applications to market the same drug for the same disease, except in limited circumstances, such as a showing of clinical superiority to the product with orphan drugexclusivity. Orphan drug exclusivity does not prevent FDA from approving a different drug for the same disease or condition, or the same drug for a different disease or condition.Prior to FDA approval, orphan designation provides incentives for sponsors including tax credits for clinical research expenses, the opportunity to obtain government grant fundingto support clinical research, and an exemption from FDA user fees.Fast Track DesignationFast track is a process designed by the FDA to facilitate the development of drugs to treat serious conditions through expediting their review. The purpose is to get important newdrugs to patients earlier. Fast Track addresses a broad range of serious conditions. Determining whether a condition is serious is a matter of judgment, but generally is based onwhether the drug will have an impact on such factors as survival, day-to-day functioning, or the likelihood that the condition, if left untreated, will progress from a less severecondition to a more serious one.A drug that receives Fast Track designation is eligible for some or all of the following:•more frequent meetings with FDA to discuss the drug's development plan and ensure collection of appropriate data needed to support drug approval;•more frequent written communication from FDA about such things as the design of the proposed clinical trials and use of biomarkers;•eligibility for Accelerated Approval and Priority Review, if relevant criteria are met; and•rolling Review, which means that a drug company can submit completed sections of its Biologic License Application (BLA) or NDA for review by FDA, rather than waitinguntil every section is completed before the entire application can be reviewed. BLA or NDA review usually does not begin until the drug company has submitted the entireapplication to the FDA.Once a drug receives Fast Track designation, early and frequent communication between the FDA and a drug company is encouraged throughout the entire drug development andreview process. The frequency of communication assures that questions and issues are resolved quickly, often leading to earlier drug approval and access by patients.Accelerated ApprovalUnder the FDA’s accelerated approval regulations, FDA may approve a drug for a serious or life-threatening illness that provides meaningful therapeutic benefit to patients overexisting treatments based upon a surrogate endpoint that is reasonably likely to predict clinical benefit, or on a clinical endpoint that can be measured earlier than irreversiblemorbidity or mortality, that is reasonably likely to predict an effect on irreversible morbidity or mortality or other clinical benefit, taking into account the severity, rarity, or prevalence ofthe condition and the availability or lack of alternative treatments.In clinical trials, a surrogate endpoint is a measurement of laboratory or clinical signs of a disease or condition that substitutes for a direct measurement of how a patient feels,functions, or survives. Surrogate endpoints can often be measured more easily or more rapidly than clinical endpoints. A drug candidate approved on this basis is subject to rigorouspost-marketing compliance requirements, including the completion of Phase 4 or post-approval clinical trials to confirm the effect on the clinical endpoint. Failure to conduct requiredpost-approval studies, or confirm a16Table of Contentsclinical benefit during post-marketing studies, will allow FDA to withdraw the drug from the market on an expedited basis. All promotional materials for drug candidates approvedunder accelerated regulations are subject to prior review by FDA. The Hatch-Waxman Amendments: Orange Book ListingIn seeking approval for a drug through an NDA, applicants are required to list with the FDA each patent whose claims cover the applicant’s product. Upon approval of a drug, eachof the patents listed in the application for the drug is then published in the FDA’s Approved Drug Products with Therapeutic Equivalence Evaluations, commonly known as theOrange Book. Drugs listed in the Orange Book can, in turn, be cited by potential generic competitors in support of approval of an ANDA. An ANDA provides for marketing of a drugproduct that has the same active ingredients in the same strengths and dosage form as the listed drug and has been shown through bioequivalence testing to be therapeuticallyequivalent to the listed drug. Other than the requirement for bioequivalence testing, ANDA applicants are not required to conduct, or submit results of, pre-clinical or clinical tests toprove the safety or effectiveness of their drug product. Drugs approved in this way are commonly referred to as “generic equivalents” to the listed drug, and can often be substitutedby pharmacists under prescriptions written for the original listed drug.The ANDA applicant is required to certify to the FDA concerning any patents listed for the approved product in the FDA’s Orange Book. Specifically, the applicant must certify that:(i) the required patent information has not been filed; (ii) the listed patent has expired; (iii) the listed patent has not expired, but will expire on a particular date and approval is soughtafter patent expiration; or (iv) the listed patent is invalid or will not be infringed by the new product. The ANDA applicant may also elect to submit a section viii statement certifyingthat its proposed ANDA label does not contain (or carves out) any language regarding the patented method-of-use rather than certify to a listed method-of-use patent. If theapplicant does not challenge the listed patents, the ANDA application will not be approved until all the listed patents claiming the referenced product have expired.A certification that the new product will not infringe the already approved product’s listed patents, or that such patents are invalid, is called a Paragraph IV certification. If the ANDAapplicant has provided a Paragraph IV certification to the FDA, the applicant must also send notice of the Paragraph IV certification to the NDA and patent holders once the ANDAhas been accepted for filing by the FDA. The NDA and patent holders may then initiate a patent infringement lawsuit in response to the notice of the Paragraph IV certification. Thefiling of a patent infringement lawsuit within 45 days of the receipt of a Paragraph IV certification automatically prevents the FDA from approving the ANDA until the earlier of 30months, expiration of the patent, settlement of the lawsuit, or a decision in the infringement case that is favorable to the ANDA applicant.The ANDA application also will not be approved until any applicable non-patent exclusivity listed in the Orange Book for the referenced product has expired.Post-Approval RequirementsOnce an NDA is approved, a product will be subject to certain post-approval requirements. For instance, the FDA closely regulates the post-approval marketing and promotion ofdrugs, including standards and regulations for direct-to-consumer advertising, off-label promotion, industry-sponsored scientific and educational activities and promotional activitiesinvolving the internet and social media. Drugs may be marketed only for the approved indications and in accordance with the provisions of the approved labeling.Adverse event reporting and submission of periodic reports is required following FDA approval of an NDA. The FDA also may require post-marketing testing, known as Phase 4testing, REMS, surveillance to monitor the effects of an approved product, or restrictions on the distribution or use of the product. In addition, quality-control, drug manufacture,packaging and labeling procedures must continue to conform to cGMPs after approval. Drug manufacturers and certain of their subcontractors are required to register theirestablishments with the FDA and certain state agencies. Registration with the FDA subjects entities to periodic unannounced inspections by the FDA, during which the agencyinspects manufacturing facilities to assess compliance with cGMPs. Accordingly, manufacturers must continue to expend time, money and effort in the areas of production andquality-control to maintain compliance with cGMPs. Later discovery of previously unknown problems with a product, including adverse events of unanticipated severity or frequency,or failure to comply with regulatory requirements, may result in, among other things:•restrictions on the marketing or manufacturing of the product, complete withdrawal of the product from the market or product recalls;•fines, warning letters or holds on post-approval clinical trials;•refusal of the FDA to approve pending applications or supplements to approved applications, or suspension or revocation of product approvals;•product seizure or detention, or refusal to permit the import or export of products; or•injunctions or the imposition of civil or criminal penalties.Pricing and ReimbursementA portion of our end-user demand for our drugs comes from patients covered under Medicaid, Medicare and other federal and state government-related programs such asTRICARE and the Department of Veterans Affairs, or the VA. As required by Federal regulations, we will provide rebates and discounts in connection with these programs.Our commercial success depends in significant part on the extent to which coverage and adequate reimbursement for these products will be available from third-party payers,including government health administration authorities, private health insurers and other organizations. Third-party payers determine which medications they will cover and establishreimbursement levels. Even if a third-party payer covers a particular product, the resulting reimbursement payment rates may not be adequate or may require co-payments thatpatients find unacceptably high. Patients who are prescribed medications for the treatment of their conditions, and their prescribing physicians, generally rely on third-party payers toreimburse all or17Table of Contentspart of the costs associated with their prescription drugs. Patients are unlikely to use our products unless coverage is provided and reimbursement is adequate to cover all or asignificant portion of the cost of our products. Therefore, coverage and adequate reimbursement is critical to product acceptance.Government authorities and other third-party payers are developing increasingly sophisticated methods of controlling healthcare costs, such as by limiting coverage and the amountof reimbursement for particular medications. Increasingly, third-party payers are requiring that drug companies provide them with predetermined discounts from list prices as acondition of coverage, are using restrictive formularies and preferred drug lists to leverage greater discounts in competitive classes, and are challenging the prices charged formedical products. Third party payers also are carefully evaluating the medical necessity and cost-effectiveness of medical products and services, in addition to their safety andefficacy, which may require us to conduct expensive pharmacoeconomic studies in order to demonstrate the medical necessity and cost-effectiveness of our products. Further, nouniform policy requirement for coverage and reimbursement for drug products exists among third-party payers in the United States. Therefore, coverage and reimbursement fordrug products can differ significantly from payer to payer. As a result, the coverage determination process is often a time-consuming and costly process that will require us toprovide scientific and clinical support for the use of our products to each payer separately, with no assurance that coverage and adequate reimbursement will be applied consistentlyor obtained in the first instance.In addition, it is possible that future legislation in the United States and other jurisdictions could be enacted which could potentially impact the coverage and reimbursement rates forour products and also could further impact the levels of discounts and rebates paid to federal and state government entities. Any legislation that impacts these areas could impact, ina significant way, our ability to generate revenues from sales of products that, if successfully developed, we bring to market.There have been a number of enacted or proposed legislative and regulatory changes affecting the healthcare system and pharmaceutical industry that could affect our commercialsuccess. For example, in March 2010, President Obama signed into law the Patient Protection and Affordable Care Act, as amended by the Health Care and EducationReconciliation Act of 2010, (collectively, the “PPACA”) a law intended to, among other things, broaden access to health insurance, reduce or constrain the growth of healthcarespending, enhance remedies against healthcare fraud and abuse, add new transparency requirements for healthcare and health insurance industries, impose new taxes and feeson pharmaceutical and medical device manufacturers and impose additional health policy reforms. Some of the provisions of the PPACA have yet to be implemented, and therehave been judicial and Congressional challenges to certain aspects of the PPACA, as well as recent efforts by the Trump administration to repeal or replace certain aspects of thePPACA. Since January 2017, President Trump has signed two Executive Orders designed to delay the implementation of certain provisions of the PPACA or otherwise circumventsome of the requirements for health insurance mandated by the PPACA. Concurrently, Congress has considered legislation that would repeal or repeal and replace all or part ofthe PPACA. While Congress has not passed comprehensive repeal legislation, two bills affecting the implementation of certain taxes under the PPACA have been signed into law.The Tax Cuts and Jobs Act of 2017 includes a provision repealing, effective January 1, 2019, the tax-based shared responsibility payment imposed by the ACA on certain individualswho fail to maintain qualifying health coverage for all or part of a year that is commonly referred to as the “individual mandate”. Additionally, on January 22, 2018, President Trumpsigned a continuing resolution on appropriations for fiscal year 2018 that delayed the implementation of certain PPACA-mandated fees, including the so-called “Cadillac” tax oncertain high cost employer-sponsored insurance plans, the annual fee imposed on certain health insurance providers based on market share, and the medical device excise tax onnon-exempt medical devices. Further, the Bipartisan Budget Act of 2018, or the BBA, among other things, amends the PPACA, effective January 1,2019, to increase the discountthat is owed by pharmaceutical manufacturers who participate in Medicare Part D from 50 percent to 70 percent, and close the coverage gap in most Medicare drug plans,commonly referred to as the “donut hole.” Congress also could consider subsequent legislation to repeal or repeal and replace other elements of the PPACA.In addition, other legislative changes have been proposed and adopted since the PPACA was enacted. For example, in August 2011, the President signed into law the BudgetControl Act of 2011, which, among other things, created the Joint Select Committee on Deficit Reduction to recommend to Congress proposals in spending reductions. The JointSelect Committee on Deficit Reduction did not achieve a targeted deficit reduction of at least $1.2 trillion for fiscal years 2012 through 2021, triggering the legislation’s automaticreduction to several government programs. This includes aggregate reductions to Medicare payments to providers of up to 2% per fiscal year, which went into effect beginning onApril 1, 2013 and will stay in effect through 2024 unless additional Congressional action is taken. Additionally, in January 2013, the American Taxpayer Relief Act of 2012 was signedinto law, which, among other things, reduced Medicare payments to several providers, including hospitals and imaging centers.Moreover, the Drug Supply Chain Security Act imposes additional obligations on manufacturers of pharmaceutical products related to product tracking and tracing. Legislative andregulatory proposals have been made to expand post-approval requirements and restrict sales and promotional activities for pharmaceutical products. We are not sure whetheradditional legislative changes will be enacted, or whether the current regulations, guidance or interpretations will be changed, or what the impact of such changes on our business, ifany, may be.There has been increasing legislative and enforcement interest in the United States with respect to drug pricing practices. Specifically, there have been several recent U.S.Congressional inquiries and numerous proposed and enacted legislation at both the state and federal levels designed to, among other things, bring more transparency to drugpricing, reduce the cost of prescription drugs under Medicare, expedite generic competition, review the relationship between pricing and manufacturer patient programs, institutedrug re-importation, and reform government program reimbursement methodologies for drugs. At the federal level, the Trump administration’s budget proposal for fiscal year 2019contains further drug price control measures that could be enacted during the 2019 budget process or in other future legislation, including, for example, measures to permitMedicare Part D plans to negotiate the price of certain drugs under Medicare Part B, to allow some states to negotiate drug prices under Medicaid, and to eliminate cost sharing forgeneric drugs for low-income patients. While any proposed measures will require authorization through additional legislation to become effective, Congress and the Trumpadministration have each indicated that it will continue to seek new legislative and/or administrative measures to control drug costs. At the state level, legislatures are increasinglypassing legislation and implementing regulations designed to control pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts,18Table of Contentsrestrictions on certain product access and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries andbulk purchasing.We expect that the PPACA, as well as other federal and state healthcare reform measures that have been and may be adopted in the future, may result in more rigorous coveragecriteria and in additional downward pressure on the price that we receive for any of our products, and could seriously harm our future revenues. In addition, it is possible that futurelegislation in the United States and other jurisdictions could be enacted which could potentially impact the reimbursement rates for the products we are developing and may developin the future and also could further impact the levels of discounts and rebates paid to federal and state government entities. Any legislation that impacts these areas could impact, ina significant way, our ability to generate revenues from sales of products that, if successfully developed, we bring to market.Health Care Regulatory LawsIn addition to FDA marketing restrictions and regulation of pharmaceutical products, several other types of state and federal laws have been applied to restrict and regulate certainbusiness practices in the pharmaceutical industry in recent years. These laws include, without limitation, anti-kickback statutes and false claims laws, data privacy and security laws,and transparency laws regarding payments or other items of value provided to healthcare providers.The federal healthcare program anti-kickback statute prohibits, among other things, knowingly and willfully offering, paying, soliciting or receiving remuneration to induce; or in returnfor; purchasing, leasing, ordering or arranging for the purchase, lease or order of any healthcare item or service reimbursable under Medicare, Medicaid, or other federally financedhealthcare programs. This statute has been interpreted broadly to apply to arrangements between pharmaceutical manufacturers on the one hand and prescribers, purchasers,and formulary managers, among others, on the other. Although there are a number of statutory exceptions and regulatory safe harbors protecting certain common activities fromprosecution or other regulatory sanctions, the exceptions and safe harbors are drawn narrowly, and practices that involve remuneration that may induce prescribing, purchases, orrecommendations may be subject to scrutiny if they do not qualify for an exemption or safe harbor. Failure to meet all of the requirements of a particular applicable statutoryexception or regulatory safe harbor does not make the conduct per se illegal under the anti-kickback statute. Instead, the legality of the arrangement will be evaluated on a case-by-case basis based on a cumulative review of all its facts and circumstances. Several courts have interpreted the statute’s intent requirement to mean that if any one purpose of anarrangement involving remuneration is to induce referrals of federal healthcare covered business, the federal anti-kickback statute has been violated. Additionally, the PPACAamended the federal anti-kickback statute to a stricter standard such that a person or entity no longer needs to have actual knowledge of the statute or specific intent to violate it inorder to have committed a violation. In addition, the PPACA codified case law that a claim including items or services resulting from a violation of the federal anti-kickback statuteconstitutes a false or fraudulent claim for purposes of the federal civil False Claims Act.Federal false claims laws, including the civil False Claims Act, prohibit any person or entity from knowingly presenting, or causing to be presented, a false claim for payment to thefederal government, or knowingly making, or causing to be made, a false statement to have a false claim paid. This includes claims made to programs where the federalgovernment reimburses, such as Medicaid, as well as programs where the federal government is a direct purchaser, such as when it purchases off the Federal Supply Schedule.The False Claims Act contains qui tam provisions, which allow a private individual, or relator, to bring a civil action on behalf of the federal government alleging that the defendantsubmitted a false claim to the federal government, and to share in any monetary recovery. In recent years, the number of suits brought by private individuals has increaseddramatically. For example, pharmaceutical and other healthcare companies have been prosecuted under these laws for allegedly inflating drug prices they report to pricing services,which in turn were used by the government to set Medicare and Medicaid reimbursement rates, and for allegedly providing free product to customers with the expectation that thecustomers would bill federal programs for the product. In addition, certain marketing practices, including off-label promotion, may also violate federal false claims laws.Also, many states have similar fraud and abuse statutes or regulations, including state anti-kickback and false claims laws, that apply to items and services reimbursed underMedicaid and other state programs, or, in several states, apply regardless of the payer.The U.S. Foreign Corrupt Practices Act, and similar worldwide anti-bribery laws generally prohibit companies and their intermediaries from making improper payments togovernment officials for the purpose of obtaining or retaining business. Our policies mandate compliance with these anti-bribery laws. We operate in parts of the world that haveexperienced governmental corruption to some degree and in certain circumstances, strict compliance with antibribery laws may conflict with local customs and practices or mayrequire us to interact with doctors and hospitals, some of which may be state controlled, in a manner that is different than in the United States. We cannot assure you that ourinternal control policies and procedures will protect us from reckless or criminal acts committed by our employees or agents. Violations of these laws, or allegations of such violations,could disrupt our business and result in criminal or civil penalties or remedial measures, any of which could have a material adverse effect on our business, financial condition andresults of operations and could cause the market value of our common stock to decline.In addition, we may be subject to data privacy and security regulation by both the federal government and the states in which we conduct our business. HIPAA, as amended by theHealth Information Technology for Economic and Clinical Health Act, or HITECH, and their respective implementing regulations, imposes specified requirements relating to theprivacy, security and transmission of individually identifiable health information. Among other things, HITECH, through its implementing regulations, makes certain of HIPAA’s privacyand security standards directly applicable to business associates, defined as a person or organization, other than a member of a covered entity’s workforce, that creates, receives,maintains or transmits protected health information for or on behalf of a covered entity for a function or activity regulated by HIPAA.Additionally, the federal Physician Payments Sunshine Act within the PPACA, and its implementing regulations, require that certain manufacturers of drugs, devices, biologicals andmedical supplies for which payment is available under Medicare, Medicaid or the Children’s Health Insurance Program (with certain exceptions) to annually report informationrelated to certain payments or other transfers of value made or distributed to19Table of Contentsphysicians and teaching hospitals, or to entities or individuals at the request of, or designated on behalf of, the physicians and teaching hospitals and to report annually certainownership and investment interests held by physicians and their immediate family members. We implemented compliance with the Sunshine Act starting with reporting year 2014and continue to report as required.Further, certain states require implementation of commercial compliance programs and marketing codes, compliance with the pharmaceutical industry’s voluntary complianceguidelines, and compliance with the applicable compliance guidance promulgated by the federal government. Other various state level requirements include restricting payments orthe provision of other items of value that may be made to healthcare providers and other potential referral sources; restricting various marketing practices; requiring prescriptiondrug companies to report expenses relating to the marketing and promotion of drug products; requiring the posting of information relating to clinical studies and their outcomes;requiring the registration of sales representatives; and requiring drug manufacturers to track and report information related to payments, gifts, compensation, and other items ofvalue to physicians and other healthcare providers. Additionally, states that have not implemented these types of regulations are considering similar proposals. Compliance withthese laws is difficult and time consuming, and companies that do not comply with these state laws face civil penalties.If our operations are found to be in violation of any of the health regulatory laws described above or any other laws that apply to us, we may be subject to significant penalties,including individual imprisonment, criminal fines, civil monetary penalties, administrative penalties, disgorgement, exclusion from participation in federal healthcare programs,contractual damages, injunctions, recall or seizure of products, total or partial suspension of production, reputational harm, administrative burdens, additional oversight and reportingobligations if we become subject to a corporate integrity agreement or similar agreement to resolve allegation of non-compliance with these laws, diminished profits and futureearnings, and the curtailment or restructuring of our operations, any of which could adversely affect our ability to operate our business and our results of operations.Foreign RegulationIn addition to regulations in the United States, we will be subject to a variety of foreign regulations governing clinical trials and commercial sales and distribution of our products.Whether or not we obtain FDA approval for a product, we must obtain approval by the comparable regulatory authorities of foreign countries before we can commence clinical trialsand approval of foreign countries or economic areas, such as the European Union, before we may market products in those countries or areas. The approval process andrequirements governing the conduct of clinical trials, product licensing, pricing and reimbursement vary greatly from place to place, and the time may be longer or shorter than thatrequired for FDA approval.Other Laws and Regulatory ProcessesWe are subject to a variety of financial disclosure and securities trading regulations as a public company in the United States, including laws relating to the oversight activities of theSecurities and Exchange Commission (“SEC”), and NASDAQ rules under which our stock is listed. In addition, the Financial Accounting Standards Board (“FASB”), the SEC, andother bodies that have jurisdiction over the form and content of our accounts, our financial statements and other public disclosure are constantly discussing and interpretingproposals and existing pronouncements designed to ensure that companies best display relevant and transparent information relating to their respective businesses.Our present and future business has been and will continue to be subject to various other laws and regulations. Various laws, regulations and recommendations relating to safeworking conditions, laboratory practices, the experimental use of animals, and the purchase, storage, movement, import and export and use and disposal of hazardous or potentiallyhazardous substances used in connection with our research work are or may be applicable to our activities. Certain agreements entered into by us involving exclusive license rightsor acquisitions may be subject to national antitrust regulatory control, the effect of which cannot be predicted. The extent of government regulation which might result from futurelegislation or administrative action, cannot accurately be predicted.EmployeesAs of February 1, 2018, we had 173 full-time employees.Available InformationWe were incorporated in the state of Delaware in February 2011. Our website address is www.retrophin.com. We post links on our website to the following filings as soon asreasonably practicable after they are electronically filed with or furnished to the SEC: annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K,proxy statements, and any amendments to those reports filed or furnished pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended. All such filings areavailable through our website free of charge. Our filings may also be read and copied at the SEC’s Public Reference Room at 100 F Street, NE, Washington, DC20549. Information on the operation of the Public Reference Room may be obtained by calling the SEC at 1-800-SEC-0330. The SEC also maintains an internet site atwww.sec.gov that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.ITEM 1A. RISK FACTORSTable of ContentsOur business, as well as an investment in our common stock, is highly speculative in nature and involves a high degree of risk. Our securities should be purchased only by personswho can afford to lose their entire investment. Carefully consider the risks and uncertainties described below together20Table of Contentswith all of the other information included herein, including the financial statements and related notes, before deciding to invest in our common stock. If any of the following risksactually occur, they could adversely affect our business, prospects, financial condition and results of operations. In such event(s), the market price of our common stock could declineand result in a loss of part or all of your investment. Accordingly, prospective investors should carefully consider, along with other matters referred to herein, the following risk factorsin evaluating our business before purchasing any shares of our common stock.Risks Related to the Commercialization of Our ProductsThe commercial success of Chenodal, Cholbam and Thiola depends on them being considered to be effective drugs with advantages over other therapies.The commercial success of our products Chenodal, Cholbam and Thiola depends on them being considered to be effective drugs with certain advantages over other therapies. Anumber of factors, as discussed in greater detail below, may adversely impact the degree of acceptance of these products, including their efficacy, safety, price and benefits overcompeting therapies, as well as the reimbursement policies of third-party payers, such as government and private insurance plans.If unexpected adverse events are reported in connection with the use of any of these products, physician and patient acceptance of the product could deteriorate and thecommercial success of such product could be adversely affected. We are required to report to the FDA events associated with our products relating to death or injury. Adverseevents could result in additional regulatory controls, such as a requirement for costly post-approval clinical studies or revisions to our approved labeling which could limit theindications or patient population for a product or could even lead to the withdrawal of a product from the market.If physicians, patients and third-party payers do not accept our products, we may be unable to generate significant revenues.Our drugs may not gain or maintain market acceptance among physicians and patients. Effectively marketing our products and any of our drug candidates, if approved, requiressubstantial efforts, both prior to launch and after approval. Physicians may elect not to prescribe our drugs, and patients may elect not to request or take them, for a variety ofreasons including:•lower demonstrated efficacy, safety and/or tolerability compared to other drugs;•prevalence and severity of adverse side-effects;•lack of cost-effectiveness;•lack of coverage and adequate reimbursement availability from third-party payers;•a decision to wait for the approval of other therapies in development that have significant perceived advantages over our drug;•convenience and ease of administration;•other potential advantages of alternative treatment methods; and•ineffective marketing and/or distribution support.If our drugs fail to achieve or maintain market acceptance, we will not be able to generate significant revenues.Changes in reimbursement practices of third-party payers could affect the demand for our products and the prices at which they are sold.The business and financial condition of healthcare-related businesses will continue to be affected by efforts of governments and third-party payers to contain or reduce the cost ofhealthcare through various means. In the United States and some foreign jurisdictions, there have been a number of legislative and regulatory changes and proposed changesregarding the healthcare system that could prevent or delay marketing approval for fosmetpantotenate, sparsentan, CNSA-001 and L-UDCA, or any other product candidate thatwe develop, restrict or regulate post-approval activities and affect our ability to profitably sell fosmetpantotenate, sparsentan, CNSA-001 and L-UDCA or any other productcandidate for which we obtain marketing approval.Our products are sold to patients whose healthcare costs are met by third-party payers, such as government programs, private insurance plans and managed-care programs.These third-party payers are increasingly attempting to contain healthcare costs by limiting both coverage and the level of reimbursement for medical products and services. Levelsof reimbursement, if any, may be decreased in the future, and future healthcare reform legislation, regulations or changes to reimbursement policies of third party payers mayotherwise adversely affect the demand for and price levels of our products, which could have a material adverse effect on our sales and profitability.Economic, social, and congressional pressure may result in individuals and government entities increasingly seeking to achieve cost savings through mechanisms that limit coverageor payment for our products. For example, state Medicaid programs are increasingly requesting manufacturers to pay supplemental rebates and requiring prior authorization foruse of drugs. Managed care organizations continue to seek price discounts and, in some cases, to impose restrictions on the coverage of particular drugs. Government efforts toreduce Medicaid expenses may lead to increased use of managed care organizations by Medicaid programs. This may result in managed care organizations influencing prescriptiondecisions for a larger segment of the population and a corresponding constraint on prices and reimbursement for our products.21Table of ContentsWe may not be able to rely on orphan drug exclusivity for Cholbam/Kolbam or any of our products.Regulatory authorities in some jurisdictions, including the United States and Europe, may designate drugs for relatively small patient populations as orphan drugs. We have obtainedorphan designation for Cholbam/Kolbam in the United States and the European Union. Generally, if a product with an orphan drug designation subsequently receives the firstmarketing approval for the indication for which it has such designation, that product is entitled to a period of marketing exclusivity, which precludes the applicable regulatory authorityfrom approving another marketing application for the same drug for the same indication for that time period. The applicable period is seven years in the United States and ten yearsin Europe. Even though we have been awarded orphan drug exclusivity for Cholbam in the United States, we may not be able to maintain it. For example, if a competitive productthat contains the same active moiety and treats the same disease as our product is shown to be clinically superior to our product, any orphan drug exclusivity we have obtained willnot block the approval of such competitive product and we may effectively lose orphan drug exclusivity. Similarly, if a competitive product that contains the same active moiety andtreats the same disease as our product candidate is approved for orphan drug exclusivity before our product candidate, we may not be able to obtain approval for our productcandidate until the expiration of the competitive product’s orphan drug exclusivity unless our product candidate is shown to be clinically superior to the competitive product.Additional competitors could enter the market, including with generic versions of our products, and sales of our affected products may decline materially.Under the Hatch-Waxman Amendments of the Federal Food, Drug, and Cosmetic Act (the "FDC Act"), a pharmaceutical manufacturer may file an ANDA, seeking approval of ageneric copy of an approved innovator product or an NDA under Section 505(b)(2) that relies on the FDA’s prior findings of safety and effectiveness in approving the innovatorproduct. A Section 505(b)(2) NDA may be for a new or improved version of the original innovator product. The Hatch-Waxman Amendments also provide for certain periods ofregulatory exclusivity, which preclude FDA approval (or in some circumstances, FDA acceptance) of an ANDA or Section 505(b)(2) NDA. In addition, the FDC Act provides, subjectto certain exceptions, a period during which an FDA-approved drug may be afforded orphan drug exclusivity. In addition to the benefits of regulatory exclusivity, an innovator NDAholder may have patents claiming the active ingredient, product formulation or an approved use of the drug, which would be listed with the product in the FDA publication,“Approved Drug Products with Therapeutic Equivalence Evaluations,” known as the “Orange Book.” If there are patents listed in the Orange Book, a generic or Section 505(b)(2)applicant that seeks to market its product before expiration of the patents must include in the ANDA what is known as a “Paragraph IV certification,” challenging the validity orenforceability of, or claiming non-infringement of, the listed patent or patents. Notice of the certification must be given to the innovator, too, and if within 45 days of receiving noticethe innovator sues to enforce its patents, approval of the ANDA is stayed for 30 months, or as lengthened or shortened by the court.Chenodal and Thiola are subject to immediate competition from compounded and generic entrants, as the ANDA and NDA for these drug products have no remaining patent ornonpatent exclusivity. There have been a number of recent regulatory and legislative initiatives designed to encourage generic competition. If a generic version is approved, sales ofour product would be negatively impacted, which would have a material adverse impact on our sales and profitability.We are dependent on third parties to manufacture and distribute our pharmaceutical products who may not fulfill their obligations.We have no manufacturing capabilities and rely on third party manufacturers who are sole source suppliers for manufacturing of Chenodal, Cholbam and Thiola. The facilities usedby our third party manufacturers must be approved by the FDA, or in the case of Kolbam in the European Union, the European Medicines Agency. Our dependence on third partiesfor the manufacture of our products may harm our profit margin on the sale of products and our ability to deliver products on a timely and competitive basis. If our third partymanufacturers are unable to manufacture to specifications or in compliance with applicable regulatory requirements, our ability to commercialize our products will be adverselyimpacted and could affect our ability to gain market acceptance for our products and negatively impact our revenues.We currently have no in-house distribution channels for Chenodal, Cholbam and Thiola and we are dependent on a third-party distributor, Dohmen Life Sciences Services, todistribute such products. We rely on this distributor for all of our proceeds from sales of Chenodal, Cholbam and Thiola in the United States. The outsourcing of our distributionfunction is complex, and we may experience difficulties that could reduce, delay or stop shipments of such products. If we encounter such distribution problems, and we are unableto quickly enter into a similar agreement with another distributor on substantially similar terms, distribution of Chenodal, Cholbam and/or Thiola could become disrupted, resulting inlost revenues, provider dissatisfaction, and/or patient dissatisfaction.Governments outside the United States tend to impose strict price controls and reimbursement approval policies, which may adversely affect our prospects forgenerating revenue.In some countries, particularly European Union countries, the pricing of prescription pharmaceuticals is subject to governmental control. In these countries, pricing negotiations withgovernmental authorities can take considerable time (6 to 12 months or longer) after the receipt of marketing approval for a product. To obtain reimbursement or pricing approval insome countries, we may be required to conduct a clinical trial that compares the cost effectiveness of our product candidate to other available therapies. If reimbursement of ourproducts is unavailable or limited in scope or amount, or if pricing is set at unsatisfactory levels, our prospects for generating revenue outside of the United States, if any, could beadversely affected and our business may suffer.If we are unable to establish sales and marketing capabilities or enter into agreements with third parties to market and sell our product candidates, we may be unable to generateproduct revenue outside of the United States.22Table of ContentsRisks Related to the Development of our Product CandidatesOur clinical trials may fail to demonstrate the safety and efficacy of our product candidates which could prevent or significantly delay their regulatory approval.Success in preclinical testing and early clinical trials does not ensure that later clinical trials will be successful, and initial results from a clinical trial do not necessarily predict finalresults. There can be no assurance that the favorable responses we have seen with the physician-initiated treatment of fosmetpantotenate in PKAN patients outside the UnitedStates will translate to positive data in the Phase 3 clinical trial of fosmetpantotenate or that the positive results from the DUET study of sparsentan in FSGS will be repeated in thePhase 3 clinical trial. Similarly, there can be no assurance that our clinical experience with sparsentan in FSGS will translate to favorable data in IGA Nephropathy. We cannotassure that any future clinical trials of fosmetpantotenate and/or sparsentan will ultimately be successful.Before obtaining regulatory approval to conduct clinical trials of our product candidates, we must conduct extensive preclinical tests to demonstrate the safety of our productcandidates in animals. Preclinical testing is expensive, difficult to design and implement, and can take many years to complete. In addition, during the clinical development process,additional nonclinical toxicology studies are routinely conducted concurrently with the clinical development of a product candidate. If any of our product candidates show unexpectedfindings in concurrent toxicology studies, we could experience potentially significant delays in, or be required to abandon, development of that product candidate. A failure of one ormore of our nonclinical studies can occur at any stage of testing.We will only obtain regulatory approval to commercialize a product candidate if we can demonstrate to the satisfaction of the FDA, and in the case of foreign commercialization, tothe applicable foreign regulatory authorities, in well-designed and conducted clinical trials, that our product candidates are safe and effective and otherwise meet the appropriatestandards required for approval for a particular indication.Although we have obtained a Special Protocol Assessment ("SPA") agreement from the FDA for a planned Phase 3 clinical trial of fosmetpantotenate for the treatment of PKAN,this agreement does not guarantee any particular outcome from regulatory review. The SPA is intended to provide assurance that if the agreed upon clinical trial protocols arefollowed and the clinical trial endpoints are achieved, the data may serve as the primary basis for an efficacy claim in support of an NDA. However, a SPA is not a guarantee of anapproval of a product candidate or any permissible claims about the product candidate. In particular, a SPA agreement is not binding on the FDA if previously unrecognized publichealth concerns arise during the performance of the clinical trial, if other new scientific concerns regarding product candidate safety or efficacy arise or if the sponsoring companyfails to comply with the agreed upon clinical trial protocols. Moreover, a SPA does not address all of the variables and details that may go into planning for or conducting a clinicaltrial, and changes in the protocol for a clinical trial can invalidate a SPA or require that the FDA agree in writing to the modified protocol. In addition, while a SPA addresses therequirements for submission of an NDA, the results of the related clinical trial may not support FDA approval. There can be no assurance that the planned Phase 3 clinical trial forfosmetpantotenate will demonstrate that fosmetpantotenate is safe and effective for treating PKAN or that the data obtained from any such clinical trials will support an applicationfor approval by the FDA.In 2017, we announced plans to initiate a single Phase 3 clinical trial to serve as the basis for an NDA filing for sparsentan for the treatment of FSGS. Although we receivedfeedback from the FDA at an End of Phase 2 meeting during which the FDA communicated that it was open to accepting a substantial treatment effect on proteinuria in this trial asa basis for accelerated approval pursuant to Subpart H of the FDA regulations and although we have subsequently gained alignment that our statistical modeling supports initiatinga Phase 3 trial that proceeds on the Subpart H pathway, there can be no guarantee that the data generated from such analyses will be sufficient to serve as the basis for an NDAfiling, including an NDA under Subpart H or accelerated approval. In addition, our statistical modeling that supports proceeding on the Subpart H pathway is based on data fromother FSGS studies. To the extent that the model population is not representative of the Phase 3 study population, the FDA may not agree that the new results continue to supporta Subpart H pathway. Furthermore, even if sparsentan is granted accelerated approval under Subpart H, there can be no assurance that the post-marketing confirmatory data willsupport full approval of sparsentan as a treatment for FSGS.Clinical trials can be lengthy, complex and extremely expensive processes with uncertain results. Our product candidates are intended to treat PKAN and FSGS, each of which is arare disease. Given that these development candidates are still undergoing required testing, we may not be able to initiate or continue clinical trials if we are unable to locate asufficient number of eligible patients willing and able to participate in the clinical trials required by the FDA or foreign regulatory agencies. Our inability to enroll a sufficient number ofpatients for any of our current or future clinical trials would result in significant delays or may require us to abandon one or more clinical trials altogether.We may experience numerous unforeseen events during, or as a result of, preclinical or nonclinical testing and the clinical trial process that could delay or prevent our ability toobtain regulatory approval or commercialize our product candidates, including:•our preclinical or nonclinical tests or clinical trials may produce negative or inconclusive results, and we may decide, or regulators may require us, to conduct additionalpreclinical testing or clinical trials or we may abandon projects that we expect to be promising;•regulators may require us to conduct studies of the long-term effects associated with the use of our product candidates;•regulators or institutional review boards may not authorize us to commence a clinical trial or conduct a clinical trial at a prospective trial site;•the FDA or any non-United States regulatory authority may impose conditions on us regarding the scope or design of our clinical trials or may require us to resubmit ourclinical trial protocols to institutional review boards for re-inspection due to changes in the regulatory environment;23Table of Contents•the number of patients required for our clinical trials may be larger than we anticipate or participants may drop out of our clinical trials at a higher rate than we anticipate;•our third-party contractors or clinical investigators may fail to comply with regulatory requirements or fail to meet their contractual obligations to us in a timely manner;•we might have to suspend or terminate one or more of our clinical trials if we, regulators or institutional review boards determine that the participants are being exposedto unacceptable health risks;•regulators or institutional review boards may require that we hold, suspend or terminate clinical research for various reasons, including noncompliance with regulatoryrequirements;•the cost of our clinical trials may be greater than we anticipate;•the supply or quality of our product candidates or other materials necessary to conduct our clinical trials may be insufficient or inadequate or we may not be able to reachagreements on acceptable terms with prospective clinical research organizations; and•the effects of our product candidates may not be the desired effects or may include undesirable side effects or the product candidates may have other unexpectedcharacteristics.If we are required to conduct additional clinical trials or other testing of our product candidates beyond those that we currently contemplate, if we are unable to successfully completeour clinical trials or other testing, if the results of these trials or tests are not positive or are only modestly positive or if there are safety concerns, we may:•be delayed in obtaining, or may not be able to obtain, marketing approval for one or more of our product candidates;•obtain approval for indications that are not as broad as intended or entirely different than those indications for which we sought approval; and•have the product removed from the market after obtaining marketing approval.Our product development costs will also increase if we experience delays in testing or approvals. We do not know whether any preclinical tests or clinical trials will be initiated asplanned, will need to be restructured or will be completed on schedule, if at all. Significant preclinical or clinical trial delays also could shorten the patent protection period duringwhich we may have the exclusive right to commercialize our product candidates. Such delays could allow our competitors to bring products to market before we do and impair ourability to commercialize our products or product candidates.In addition, we depend on independent clinical investigators and contract research organizations (“CROs”) to conduct our clinical trials under agreements with us. The CROs play asignificant role in the conduct of our clinical trials. Failure of the CROs to meet their obligations could adversely affect clinical development of our product candidates. Theindependent clinical investigators are not our employees and we cannot control the timing or amount of resources they devote to our studies. If their performance is substandard, itcould delay or prevent approval of our FDA applications.FDA approval for a product requires substantial or extensive preclinical and clinical data and supporting documentation. The approval process may take years and may involve on-going requirements as well as post marketing obligations. For example, we have certain post marketing requirements and commitments associated with Cholbam. FDA approvalonce obtained, may be withdrawn. If the regulatory approval for Chenodal, Cholbam and/or Thiola are withdrawn for any reason, it would have a material adverse impact on oursales and profitability. Further, we face risks relating to the post marketing obligations and commercial acceptance of Cholbam, which was approved by the FDA on March 17, 2015.We face substantial risks related to the commercialization of our product candidates.We have invested a significant portion of our efforts and financial resources in the development and acquisition of our most advanced product candidates, fosmetpantotenate,sparsentan, CNSA-001 and L-UDCA. Our ability to generate product revenue from these development stage compounds, which we do not expect will occur for at least the nextseveral years, if ever, may depend heavily on the successful development and commercialization of these product candidates. The successful commercialization of our futureproduct candidates will depend on several factors, including the following:•obtaining supplies of fosmetpantotenate, sparsentan, CNSA-001 and subsequent product candidates for completion of our clinical trials on a timely basis;•successful completion of pre-clinical and clinical studies;•with respect to L-UDCA, our ability to complete the activities necessary to submit an NDA;•obtaining marketing approvals from the FDA and similar regulatory authorities outside the United States;•establishing commercial-scale manufacturing arrangements with third-party manufacturers whose manufacturing facilities are operated in compliance with cGMPregulations;•launching commercial sales of the product, whether alone or in collaboration with others;•acceptance of the product by patients, the medical community and third-party payers;24Table of Contents•reimbursement from medical, medicaid or private payers;•competition from other companies;•successful protection of our intellectual property rights from competing products in the United States and abroad; and•a continued acceptable safety and efficacy profile of our product candidates following approval.Furthermore, we have entered into a joint development agreement with Censa to evaluate CNSA-001 for the treatment of PKU. Under this agreement, we have agreed to fundcertain development activities of Censa’s CNSA-001 program, in an aggregate amount expected to be approximately $16 million through proof of concept. However, we havelimited control over the development activities of Censa’s CNSA-001 program and face the risk that the development program for CNSA-001 will not be successful, that Censa doesnot conduct the development activities in a timely manner, or that the development program for CNSA-001 may cost more than expected to reach proof of concept. If any of theseissues arise, our investment in Censa’s CNSA-001 program may be adversely affected and our business may suffer.Our product candidates may cause undesirable side effects or have other properties that could delay or prevent their regulatory approval or commercialization.Undesirable side effects caused by our product candidates could interrupt, delay or halt clinical trials and could result in the denial of regulatory approval by the FDA or otherregulatory authorities for any or all targeted indications, and in turn prevent us from commercializing our product candidates and generating revenues from their sale.In addition, if any of our product candidates receive marketing approval and we or others later identify undesirable side effects caused by the product:•regulatory authorities may require the addition of restrictive labeling statements;•regulatory authorities may withdraw their approval of the product; and•we may be required to change the way the product is administered or conduct additional clinical trials.Any of these events could prevent us from achieving or maintaining market acceptance of the affected product or could substantially increase the costs and expenses ofcommercializing the product candidate, which in turn could delay or prevent us from generating significant revenues from its sale or adversely affect our reputation.We may not be able to obtain orphan drug exclusivity for our product candidates. If our competitors are able to obtain orphan drug exclusivity for their productsthat are the same drug as our product candidates, we may not be able to have competing products approved by the applicable regulatory authority for asignificant period of time.Regulatory authorities in some jurisdictions, including the United States and Europe, may designate drugs for relatively small patient populations as orphan drugs. Although we haveobtained orphan designation for fosmetpantotenate and sparsentan, there can be no assurance that there will be any benefits associated with such designation.Generally, if a product with an orphan drug designation subsequently receives the first marketing approval for the indication for which it has such designation, that product is entitledto a period of marketing exclusivity, which precludes the applicable regulatory authority from approving another marketing application for the same drug for the same indication forthat time period. The applicable period is seven years in the United States and ten years in Europe. Even if we have orphan drug exclusivity, we may not be able to maintain it. Forexample, if a competitive product that contains the same active moiety and treats the same disease as our product candidate is shown to be clinically superior to our productcandidate, any orphan drug exclusivity we have obtained will not block the approval of such competitive product and we may effectively lose what had previously been orphan drugexclusivity. Similarly, if a competitive product that contains the same active moiety and treats the same disease as our product candidate is approved before our product candidate isapproved, we may not be able to obtain approval for our product candidate until the expiration of the competitive product’s orphan drug exclusivity unless our product candidate isshown to be clinically superior to the competitive product.Risks Related to our Products and Product CandidatesOur products may not achieve or maintain expected levels of market acceptance or commercial success.The success of our products is dependent upon achieving and maintaining market acceptance. Commercializing products is time consuming, expensive and unpredictable. Therecan be no assurance that we will be able to, either by ourselves or in collaboration with our partners or through our licensees, successfully commercialize new products or currentproducts or gain market acceptance for such products. New product candidates that appear promising in development may fail to reach the market or may have only limited or nocommercial success.Further, the discovery of significant problems with a product similar to one of our products that implicate (or are perceived to implicate) an entire class of products could have anadverse effect on sales of the affected products. Accordingly, new data about our products, or products similar to our products, could negatively impact demand for our productsdue to real or perceived side effects or uncertainty regarding efficacy and, in some cases, could result in product withdrawal.Our current products and any products that we bring to the market, including fosmetpantotenate, sparsentan, CNSA-001 and L-UDCA, if they receive marketing approval, may notgain market acceptance by physicians, patients, third-party payers, and others in the medical community. If these products do not achieve an adequate level of acceptance, we maynot generate significant product revenue and we may not become25Table of Contentsprofitable. The degree of market acceptance of our product candidates, if approved for commercial sale, will depend on a number of factors, including:•the prevalence and severity of any side effects, including any limitations or warnings contained in a product’s approved labeling;•the efficacy and potential advantages over alternative treatments;•the pricing of our product candidates;•relative convenience and ease of administration;•the willingness of the target patient population to try new therapies and of physicians to prescribe these therapies;•the strength of marketing and distribution support and timing of market introduction of competitive products;•publicity concerning our products or competing products and treatments; and•sufficient third-party insurance coverage or reimbursement.Even if a potential or current product displays a favorable efficacy and safety profile in preclinical and clinical trials, market acceptance of the product will not be known until after it islaunched. Our efforts to educate patients, the medical community, and third-party payers on the benefits of our product may require significant resources and may never besuccessful. Such efforts to educate the marketplace may require more resources than are required by the conventional marketing technologies employed by our competitors.If the market opportunities for our products and product candidates are smaller than we believe they are, our revenues may be adversely affected and ourbusiness may suffer.Certain of the diseases that our current and future product candidates are being developed to address, such as PKAN, PKU, FSGS and IgAN, are relatively rare. Our projections ofboth the number of people who have these diseases, as well as the subset of people with these diseases who have the potential to benefit from treatment with our productcandidates, may not be accurate.Currently, most reported estimates of the prevalence of PKAN and FSGS are based on studies of small subsets of the population of specific geographic areas, which are thenextrapolated to estimate the prevalence of the diseases in the broader world population. As new studies are performed the estimated prevalence of these diseases may change.There can be no assurance that the prevalence of PKAN and FSGS in the study populations accurately reflect the prevalence of these diseases in the broader world population. Ifour estimates of the prevalence of PKAN, PKU, FSGS, or IgAN or of the number of patients who may benefit from treatment with fosmetpantotenate, sparsentan, and CNSA-001prove to be incorrect, the market opportunities for our product candidates may be smaller than we believe they are, our prospects for generating revenue may be adverselyaffected and our business may suffer.We do not currently have patent protection for certain of our products and product candidates. If we are unable to obtain and maintain protection for theintellectual property relating to our technology and products, the value of our technology and products will be adversely affected.Our success will depend in large part on our ability to obtain and maintain protection in the United States and other countries for the intellectual property covering, or incorporatedinto, our technology and products. The patent situation in the field of biotechnology and pharmaceuticals generally is highly uncertain and involves complex legal, technical, scientificand factual questions. We may not be able to obtain additional issued patents relating to our technology or products. Even if issued, patents issued to us or our licensors may bechallenged, narrowed, invalidated, held to be unenforceable or circumvented, which could limit our ability to stop competitors from marketing similar products or reduce the term ofpatent protection we may have for our products. Changes in either patent laws or in interpretations of patent laws in the United States and other countries may diminish the value ofour intellectual property or narrow the scope of our patent protection. Fosmetpantotenate is covered by our U.S. Patent No. 8,673,883, which was granted in 2014 and expires in2033. In addition, our U.S. Patent No. 9,181,286, which was granted on November 10, 2015 and expires in 2033, covers the use of fosmetpantotenate for the treatment of PKAN,and our U.S. Patent No. 9,629,862, which was granted on April 25, 2017 and also expires in 2033, covers pharmaceutical compositions that contain fosmetpantotenate. Sparsentanis covered by U.S. Patent No. 6,638,937, which expires in 2019 and to which we have an exclusive license. In addition, our U.S. Patent No. 9,662,312, which was granted on May30, 2017 and expires in 2030, covers the use of sparsentan for treating glomerulosclerosis, including FSGS.For products we develop based on a new chemical entity not previously approved by the FDA, we expect that in addition to the protection afforded by our patent filings that we willbe able to obtain either five years regulatory exclusivity via the provisions of the FDC Act or seven years regulatory exclusivity via the orphan drug provisions of the FDC Act. Inaddition, we may be able to obtain up to five years patent term extension (to compensate for regulatory approval delay) for a patent covering such a product.The degree of future protection for our proprietary rights is uncertain, and we cannot ensure that:•we or our licensors were the first to make the inventions covered by each of our pending patent applications;•we or our licensors were the first to file patent applications for these inventions;•others will not independently develop similar or alternative technologies or duplicate any of our technologies;•any patents issued to us or our licensors that provide a basis for commercially viable products will provide us with any competitive advantages or will not be challenged bythird parties;26Table of Contents•we will develop additional proprietary technologies that are patentable;•we will file patent applications for new proprietary technologies promptly or at all;•the claims we make in our patents will be upheld by patent offices in the United States and elsewhere;•our patents will not expire prior to or shortly after commencing commercialization of a product; and•the patents of others will not have a negative effect on our ability to do business.We have negotiated a license agreement with Ligand Pharmaceuticals for the rights to sparsentan which we are initially developing for the treatment of FSGS. This license subjectsus to various commercialization, reporting and other obligations. If we were to default on our obligations, we could lose our rights to sparsentan. We have obtained a U.S. andEuropean patent covering the use of sparsentan for treating glomerulosclerosis, including FSGS. However, we cannot be certain that we will be able to obtain patent protection forvarious other potential indications for sparsentan, or whether, if granted, we would be able to enforce such patents.Our patents also may not afford us protection against competitors with similar technology. Because patent applications in the United States and many other jurisdictions are typicallynot published until 18 months after filing, or in some cases not at all, and because publications of discoveries in the scientific literature often lag behind the actual discoveries, neitherwe nor our licensors can be certain that we or they were the first to make the inventions claimed in our or their issued patents or pending patent applications, or that we or theywere the first to file for protection of the inventions set forth in these patent applications. If a third party has also filed a United States patent application prior to the effective date ofthe relevant provisions of the America Invents Act (i.e. before March 16, 2013) covering our product candidates or a similar invention, we may have to participate in an adversarialproceeding, known as an interference, declared by the USPTO to determine priority of invention in the United States. The costs of these proceedings could be substantial and it ispossible that our efforts could be unsuccessful, resulting in a loss of our United States patent position.We cannot assure you that third parties will not assert patent or other intellectual property infringement claims against us with respect to technologies used in our products. If patentinfringement suits were brought against us, we may be unable to commercialize some of our products which could severely harm our business. Litigation proceedings, even if notsuccessful, could result in substantial costs and harm our business.We expect to rely on orphan drug status to develop and commercialize certain of our product candidates, but our orphan drug designations may not confermarketing exclusivity or other expected commercial benefits.We expect to rely on orphan drug exclusivity for fosmetpantotenate and sparsentan and potential future product candidates that we may develop. Orphan drug status currentlyconfers seven years of marketing exclusivity in the United States under the FDC Act, and up to ten years of marketing exclusivity in Europe for a particular product in a specifiedindication. The FDA and EMA have granted orphan designation for fosmetpantotenate and sparsentan for the treatment of PKAN and FSGS, respectively. While we have beengranted these orphan designations, we will not be able to rely on these designations to exclude other companies from manufacturing or selling these molecules for the sameindication beyond these time frames. Furthermore, any marketing exclusivity in Europe can be reduced from ten years to six years if the initial designation criteria have significantlychanged since the market authorization of the orphan product.For any product candidate for which we have been granted orphan drug designation in a particular indication, it is possible that another company also holding orphan drugdesignation for the same product candidate will receive marketing approval for the same indication before we do. If that were to happen, our applications for that indication may notbe approved until the competing company's period of exclusivity expires. Even if we are the first to obtain marketing authorization for an orphan drug indication in the United States,there are circumstances under which a competing product may be approved for the same indication during the seven-year period of marketing exclusivity, such as if the laterproduct is shown to be clinically superior to our orphan product, or if the later product is deemed a different product than ours. Further, the seven-year marketing exclusivity wouldnot prevent competitors from obtaining approval of the same product candidate as ours for indications other than those in which we have been granted orphan drug designation, orfor the use of other types of products in the same indications as our orphan product.Any drugs we develop may become subject to unfavorable pricing regulations, third-party reimbursement practices or healthcare reform initiatives, therebyharming our business.In March 2010, President Obama signed the Patient Protection and Affordable Care Act ("PPACA"), a sweeping law intended to broaden access to health insurance, reduce orconstrain the growth of healthcare spending, enhance remedies against fraud and abuse, add new transparency requirements for healthcare and health insurance industries,impose new taxes and fees on the health industry and impose additional health policy reforms. The PPACA revised the definition of “average manufacturer price” for reportingpurposes, which could increase the amount of Medicaid drug rebates to states. Further, the law imposes a significant annual fee on companies that manufacture or import certainbranded prescription drug products. Some of the provisions of the PPACA have yet to be implemented, and there have been judicial and Congressional challenges to certainaspects of the PPACA, as well as recent efforts by the Trump administration to repeal or replace certain aspects of the PPACA. Since January 2017, President Trump has signedtwo Executive Orders designed to delay the implementation of certain provisions of the PPACA or otherwise circumvent some of the requirements for health insurance mandated bythe PPACA. Concurrently, Congress has considered legislation that would repeal or repeal and replace all or part of the PPACA. While Congress has not passed comprehensiverepeal legislation, two bills affecting the implementation of certain taxes under the PPACA have been signed into law. The Tax Cuts and Jobs Act of 2017 includes a provisionrepealing, effective January 1, 2019, the tax-based shared responsibility payment imposed by the ACA on certain individuals who fail to maintain qualifying health coverage for all orpart of a year that is commonly referred to as the “individual mandate”. Additionally, on January 22, 2018, President Trump signed a continuing resolution on appropriations forfiscal year 2018 that delayed the implementation of certain PPACA-mandated fees, including the so-called “Cadillac”27Table of Contentstax on certain high cost employer-sponsored insurance plans, the annual fee imposed on certain health insurance providers based on market share, and the medical device excisetax on non-exempt medical devices. Further, the Bipartisan Budget Act of 2018 ("BBA"), among other things, amends the PPACA, effective January 1,2019, to increase thediscount that is owed by pharmaceutical manufacturers who participate in Medicare Part D from 50 percent to 70 percent, and close the coverage gap in most Medicare drug plans,commonly referred to as the “donut hole”. It is likely the PPACA, or a replacement of it under the current administration, will continue to put pressure on pharmaceutical pricing. Wecontinue to evaluate the potential impact of the PPACA and its possible repeal or replacement on our business.If we are unable to obtain coverage and adequate reimbursement from governments or third-party payers for any products that we may develop or if we are unable to obtainacceptable prices for those products, our prospects for generating revenue and achieving profitability will suffer.Our prospects for generating revenue and achieving profitability will depend heavily upon the availability of coverage and adequate reimbursement for the use of our approvedproduct candidates from governmental and other third-party payers, both in the United States and in other markets. Reimbursement by a third-party payer may depend upon anumber of factors, including the third-party payer’s determination that use of a product is:•a covered benefit under its health plan;•safe, effective and medically necessary;•appropriate for the specific patient;•cost-effective; and•neither experimental nor investigational.Obtaining reimbursement approval for a product from each government or other third-party payer is a time consuming and costly process that could require us to providesupporting scientific, clinical and cost effectiveness data for the use of our products to each payer. We may not be able to provide data sufficient to gain acceptance with respect toreimbursement or we might need to conduct post-marketing studies in order to demonstrate the cost-effectiveness of any future products to such payers’ satisfaction. Such studiesmight require us to commit a significant amount of management time and financial and other resources. Even when a payer determines that a product is eligible for reimbursement,the payer may impose coverage limitations that preclude payment for some uses that are approved by the FDA or non-United States regulatory authorities. Also prior authorizationfor a product may be required. In addition, there is a risk that full reimbursement may not be available for high-priced products. Moreover, eligibility for coverage does not imply thatany product will be reimbursed in all cases or at a rate that allows us to make a profit or even cover our costs. Interim payments for new products, if applicable, may also not besufficient to cover our costs and may not be made permanent. A primary trend in the United States healthcare industry and elsewhere is toward cost containment. We expect recentchanges in the Medicare program and increasing emphasis on managed care to continue to put pressure on pharmaceutical product pricing.Further, there has been increasing legislative and enforcement interest in the United States with respect to drug pricing practices, including several recent U.S. congressionalinquiries and proposed federal and proposed and enacted state legislation designed to, among other things, increase drug pricing transparency, expedite generic competition,review relationships between pricing and manufacturer patient assistance programs, and reform government program drug reimbursement methodologies. At the federal level, theTrump administration’s budget proposal for fiscal year 2019 contains further drug price control measures that could be enacted during the 2019 budget process or in other futurelegislation, including, for example, measures to permit Medicare Part D plans to negotiate the price of certain drugs under Medicare Part B, to allow some states to negotiate drugprices under Medicaid, and to eliminate cost sharing for generic drugs for low-income patients. While any proposed measures will require authorization through additional legislationto become effective, Congress and the Trump administration have each indicated that it will continue to seek new legislative and/or administrative measures to control drug costs. Atthe state level, legislatures are increasingly passing legislation and implementing regulations designed to control pharmaceutical and biological product pricing, including price orpatient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures, and, in some cases, designed toencourage importation from other countries and bulk purchasing.Any reduction in reimbursement from Medicare, Medicaid or other government-funded programs may result in a similar reduction in payments from private payors. Theimplementation of cost containment measures or other healthcare reforms may prevent us from being able to generate revenue, attain profitability or commercialize our drugs.Additionally, we are currently unable to predict what additional legislation or regulation, if any, relating to the healthcare industry may be enacted in the future or what effect recentlyenacted federal legislation or any such additional legislation or regulation would have on our business.We face potential product liability exposure far in excess of our limited insurance coverage.The use of any of our potential products in clinical trials, and the sale of any approved products, may expose us to liability claims. These claims might be made directly by consumers,health care providers, pharmaceutical companies or others selling our products. We have obtained limited product liability insurance coverage for our clinical trials in the amount of$10 million per occurrence and $10 million in the aggregate. However, our insurance may not reimburse us or may not be sufficient to reimburse us for any expenses or losses wemay suffer. Moreover, insurance coverage is becoming increasingly expensive, and we may not be able to maintain insurance coverage at a reasonable cost or in sufficient amountsto protect us against losses due to liability. We intend to expand our insurance coverage to include the sale of commercial products if we obtain marketing approval for productcandidates in development, but we may be unable to obtain commercially reasonable product liability insurance for any products approved for marketing. On occasion, juries haveawarded large judgments in class action lawsuits based on drugs that had unanticipated side effects. A successful product liability claim or series of claims brought against us woulddecrease our cash reserves and could cause our stock price to fall.28Table of ContentsWe face substantial competition, which may result in others discovering, developing or commercializing products before or more successfully than we do. Ouroperating results will suffer if we fail to compete effectively.Several of our competitors have substantially greater financial, research and development, distribution, manufacturing and marketing experience and resources than we do andrepresent substantial long-term competition for us. Other companies may succeed in developing and marketing products that are more effective and/or less costly than any productsthat may be developed and marketed by us, or that are commercially accepted before any of our products. Factors affecting competition in the pharmaceutical and drug industriesvary, depending on the extent to which a competitor is able to achieve a competitive advantage based on its proprietary technology and ability to market and sell drugs. The industryin which we compete is characterized by extensive research and development efforts and rapid technological progress. Although we believe that our orphan drug status forCholbam and proprietary position with respect to fosmetpantotenate and sparsentan may give us a competitive advantage, new developments are expected to continue and therecan be no assurance that discoveries by others will not render such potential products noncompetitive.Our competitive position also depends on our ability to enter into strategic alliances with one or more large pharmaceutical and contract manufacturing companies, attract and retainqualified personnel, develop effective proprietary products, implement development and marketing plans, obtain patent protection, secure adequate capital resources andsuccessfully sell and market our approved products. There can be no assurance that we will be able to successfully achieve all of the foregoing objectives.Use of third parties to manufacture and distribute our products and product candidates may increase the risk that we will not have sufficient quantities of ourproduct and product candidates or such quantities at an acceptable cost, and clinical development and commercialization of our product and productcandidates could be delayed, prevented or impaired.We do not own or operate manufacturing facilities for clinical or commercial production of our products. We have limited personnel with experience in drug manufacturing and welack the resources and the capabilities to manufacture any of our product candidates on a clinical or commercial scale. We outsource all manufacturing and packaging of ourpreclinical, clinical, and commercial products to third parties. The manufacture of pharmaceutical products requires significant expertise and capital investment, including thedevelopment of advanced manufacturing techniques and process controls. Manufacturers of pharmaceutical products often encounter difficulties in production, particularly in scalingup initial production and in maintaining required quality control. These problems include difficulties with production costs and yields and quality control, including stability of theproduct candidate.We do not currently have any agreements with third-party manufacturers for the long-term commercial supply of any of our development stage product candidates. We may beunable to enter into agreements for commercial supply with third-party manufacturers, or may be unable to do so on acceptable terms. Even if we enter into these agreements, themanufacturers of each product candidate will be single source suppliers to us for a significant period of time. Reliance on third-party manufacturers entails risks to which we may notbe subject if we manufactured our product candidates or products ourselves, including:•reliance on the third party for regulatory compliance and quality assurance;•limitations on supply availability resulting from capacity and scheduling constraints of the third parties;•impact on our reputation in the marketplace if manufacturers of our products fail to meet the demands of our customers;•the possible breach of the manufacturing agreement by the third party because of factors beyond our control; and•the possible termination or nonrenewal of the agreement by the third party, based on its own business priorities, at a time that is costly or inconvenient for us.The failure of any of our contract manufacturers to maintain high manufacturing standards could result in injury or death of clinical trial participants or patients using our products.Such failure could also result in product liability claims, product recalls, product seizures or withdrawals, delays or failures in testing or delivery, cost overruns or other problems thatcould seriously harm our business or profitability.Our contract manufacturers will be required to adhere to FDA regulations setting forth cGMP. These regulations cover all aspects of the manufacturing, testing, quality control andrecordkeeping relating to our product candidates and any products that we may commercialize. Our manufacturers may not be able to comply with cGMP regulations or similarregulatory requirements outside the United States. Our manufacturers are subject to unannounced inspections by the FDA, state regulators and similar regulators outside theUnited States. Our failure, or the failure of our third-party manufacturers, to comply with applicable regulations could result in sanctions being imposed on us, including fines,injunctions, civil penalties, failure of regulatory authorities to grant marketing approval of our product candidates, delays, suspension or withdrawal of approvals, license revocation,seizures or recalls of product candidates or products, operating restrictions and criminal prosecutions, any of which could significantly and adversely affect regulatory approval andsupplies of our product candidates.Our product and any products that we may develop may compete with other product candidates and products for access to manufacturing facilities. There are a limited number ofmanufacturers that operate under cGMP regulations and that are both capable of manufacturing for us and willing to do so. If the third parties that we engage to manufactureproducts for our developmental or commercial products should cease to continue to do so for any reason, we likely would experience interruptions in cash flows and/or delays inadvancing our clinical trials while we identify and qualify replacement suppliers, and we may be unable to obtain replacement supplies on terms that are favorable to us. Laterrelocation to another manufacturer will also require notification, review and other regulatory approvals from the FDA and other regulators and will subject our production to furthercost and instability in the availability of our product candidates. In addition, if we are not able to obtain adequate supplies of our product candidates, or the drug substances used tomanufacture them, it will be more difficult for us to sell our products and to develop our product candidates. This could greatly reduce our competitiveness.29Table of ContentsOur current and anticipated future dependence upon others for the manufacture of our product candidates may adversely affect our future profit margins and our ability to developproduct candidates and commercialize any products that obtain regulatory approval on a timely and competitive basis.Materials necessary to manufacture our products and product candidates may not be available on commercially reasonable terms, or at all, which may delay thedevelopment and commercialization of our products and product candidates.We rely on the manufacturers of our products and product candidates to purchase from third-party suppliers the materials necessary to produce the compounds for our preclinicaland clinical studies and rely on these other manufacturers for commercial distribution if we obtain marketing approval for any of our product candidates. Suppliers may not sell thesematerials to our manufacturers at the time we need them or on commercially reasonable terms and all such prices are susceptible to fluctuations in price and availability due totransportation costs, government regulations, price controls, and changes in economic climate or other foreseen circumstances. We do not have any control over the process ortiming of the acquisition of these materials by our manufacturers. Moreover, we currently do not have any agreements for the commercial production of these materials. If ourmanufacturers are unable to obtain these materials for our preclinical and clinical studies, product testing and potential regulatory approval of our product candidates would bedelayed, significantly impacting our ability to develop our product candidates. If our manufacturers or we are unable to purchase these materials after regulatory approval has beenobtained for our product candidates, the commercial launch of our product candidates would be delayed or there would be a shortage in supply, which would materially affect ourability to generate revenues from the sale of our product candidates.Risks Related to Our BusinessOur limited operating history makes it difficult to evaluate our future prospects, and our profitability in the future is uncertain.We face the problems, expenses, difficulties, complications and delays, many of which are beyond our control, associated with any business in its early stages and have a limitedoperating history on which an evaluation of our prospects can be made. Such prospects should be considered in light of the risks, expenses and difficulties frequently encountered inthe establishment of a business in a new industry, characterized by a number of market entrants and intense competition, and in the shift from development to commercialization ofnew products based on innovative technologies.We have experienced significant growth over the past three years in the number of our employees and the scope of our operations. We have added sales and marketing,compliance and legal functions in addition to expansion of all functions to support a commercial organization. To manage our anticipated future growth, we must continue toimplement and improve our managerial, operational and financial systems, expand our facilities and continue to recruit and train additional qualified personnel. Due to our limitedresources, we may not be able to effectively manage the expansion of our operations or recruit and train additional qualified personnel. The physical expansion of our operationsmay lead to significant costs and may divert our management and business development resources. Any inability on the part of our management to manage growth could delay theexecution of our business plans or disrupt our operations.Factors that may inhibit our efforts to commercialize our products without strategic partners or licensees include:•our inability to recruit and retain adequate numbers of effective sales and marketing personnel;•the inability of sales personnel to obtain access to or educate adequate numbers of physicians to prescribe our products;•the lack of complementary products to be offered by our sales personnel, which may put us at a competitive disadvantage against companies with broader product lines;•unforeseen costs associated with expanding our own sales and marketing team for new products or with entering into a partnering agreement with an independent salesand marketing organization; and•efforts by our competitors to commercialize competitive products.Moreover, though we generate revenues from product sales arrangements, we may incur significant operating losses over the next several years. Our ability to achieve profitableoperations in the future will depend in large part upon successful in-licensing of products approved by the FDA, selling and manufacturing these products, completing developmentof our products, obtaining regulatory approvals for these products, and bringing these products to market. The likelihood of the long-term success of our company must beconsidered in light of the expenses, difficulties and delays frequently encountered in the development and commercialization of new drug products, competitive factors in themarketplace, as well as the regulatory environment in which we operate.In addition, we may encounter unforeseen expenses, difficulties, complications, delays and other known and unknown factors.We will likely experience fluctuations in operating results and could incur substantial losses.We expect that our operating results will vary significantly from quarter-to-quarter and year-to-year as a result of investments in research and development, specifically our clinicaland preclinical development activities. We have not completed development of any drugs and we anticipate that our expenses will increase substantially as we:•continue our ongoing clinical development of fosmetpantotenate for the treatment of PKAN;•continue the open label portion of DUET and conduct the planned Phase 3 trials of sparsentan indications;•continue funding the clinical development of CNSA-001 for PKU;30Table of Contents•complete requirements necessary for an NDA filing of L-UDCA and the next generation of Thiola;•continue the research and development of additional product candidates;•expand our sales and marketing infrastructure to commercialize our current products and any new products for which we may obtain regulatory approval; and•expand operational, financial, and management information systems and personnel, including personnel to support product development efforts and our obligations as apublic company.To attain and sustain profitability, we must succeed in developing and commercializing drugs with significant market potential. This will require us to be successful in a range ofchallenging activities, including the discovery of product candidates, successful completion of preclinical testing and clinical trials of our product candidates, obtaining regulatoryapproval for these product candidates and manufacturing, marketing and selling those products for which we may obtain regulatory approval. We are only in the preliminary stagesof these activities. We may not be successful enough in these activities to generate revenues that are substantial enough to achieve profitability. Even if we do achieve profitability,we may not be able to sustain or increase profitability on a quarterly or annual basis. Our failure to become or remain profitable could depress the market price of our common stockand could impair our ability to raise capital, expand our business, diversify our product offerings or continue our operations. A decline in the market price of our common stock mayalso cause a loss of a part or all of your investment.Negative publicity regarding any of our products could impair our ability to market any such product and may require us to spend time and money to addressthese issues.If any of our products or any similar products distributed by other companies prove to be, or are asserted to be, harmful to consumers and/or subject to FDA enforcement action,our ability to successfully market and sell our products could be impaired. Because of our dependence on patient and physician perceptions, any adverse publicity associated withillness or other adverse effects resulting from the use or misuse of our products or any similar products distributed by other companies could limit the commercial potential of ourproducts and expose us to potential liabilities.We may not have sufficient insurance to cover our liability in any current or future litigation claims either due to coverage limits or as a result of insurance carriersseeking to deny coverage of such claims.We face a variety of litigation-related liability risks. Our certificate of incorporation, bylaws, other applicable agreements, and/or Delaware law require us to indemnify (and advanceexpenses to) our current and past directors and officers and employees from reasonable expenses related to the defense of any action arising from their service to us, includingcircumstances under which indemnification is otherwise discretionary. While our directors and officers are included in a director and officer liability insurance policy, which covers allour directors and officers in some circumstances, our insurance coverage does not cover all of our indemnification obligations and may not be adequate to cover any indemnificationor other claims against us. In addition, the underwriters of our present coverage may seek to avoid coverage in certain circumstances based upon the terms of the respectivepolicies. If we incur liabilities that exceed our coverage under our directors and officers insurance policy or incur liabilities not covered by our insurance, we would have to self-fundany indemnification amounts owed to our directors and officers and employees in which case our results of operations and financial condition could be materially adversely affected. Further, if D&O insurance becomes prohibitively expensive to maintain in the future, we may be unable to renew such insurance on economic terms or unable renew suchinsurance at all. The lack of D&O insurance may make it difficult for us to retain and attract talented and skilled directors and officers to serve our company, which could adverselyaffect our businessWe may need substantial funding and may be unable to raise capital when needed, which would force us to delay, reduce or eliminate our product developmentprograms or commercialization efforts.We expect our general and research and development expenses to increase in connection with our ongoing and planned activities, particularly as we conduct Phase 3 clinical trialsof fosmetpantotenate and sparsentan, continue funding the clinical development of CNSA-001 and potentially acquire Censa, complete requirements for filings of L-UDCA, andconduct any other later-stage clinical trials of our product candidates. In addition, subject to obtaining regulatory approval of any of our product candidates, we expect to incursignificant commercialization expenses for product sales and marketing, securing commercial quantities of product from our manufacturers, and product distribution. We currentlyhave no additional commitments or arrangements for any additional financing to fund the research and development and commercial launch of our product candidates.Management believes our ability to continue our operations depends on our ability to sustain and grow revenue, results of operations and our ability to access capital markets whennecessary to accomplish our strategic objectives. Management believes that we may incur losses in the immediate future. For the twelve months ended December 31, 2017, wegenerated a positive cash flow from operations; however, we expect that our operating results will vary significantly from quarter-to-quarter and year-to-year as a result ofinvestments in research and development, specifically our clinical and preclinical development activities. We expect to finance our cash needs from cash on hand and results ofoperations, and depending on results of operations we may either need additional equity or debt financing, or need to enter into strategic alliances on products in development tocontinue our operations until we can achieve sustained profitability and positive cash flows from operating activities. Additional funds may not be available to us when we need themon terms that are acceptable to us, or at all. If adequate funds are not available to us on a timely basis, we may be required to reduce or eliminate research development programsor commercial efforts.Our future capital requirements will depend on many factors, including:•the progress and results of our pre-clinical and clinical studies of fosmetpantotenate, sparsentan, CNSA-001 and other drug candidates;•the costs, timing and outcome of regulatory review of our product candidates;31Table of Contents•the number and development requirements of other product candidates that we pursue;•the costs of commercialization activities, including product marketing, sales and distribution;•the emergence of competing technologies and other adverse market developments;•the costs of preparing, filing and prosecuting patent applications and maintaining, enforcing and defending intellectual property related claims;•the extent to which we acquire or invest in businesses, products and technologies, including the extent to which we exercise our option to acquire Censa; and•our ability to establish collaborations and obtain milestone, royalty or other payments from any such collaborators.The market price for shares of our common stock may be volatile and purchasers of our common stock could incur substantial losses.The price of our stock is likely to be volatile. The stock market in general, and the market for biotechnology companies in particular, have experienced extreme volatility that hasoften been unrelated to the operating performance of particular companies. The market price for our common stock may be influenced by many factors, including:•results of clinical trials of our product candidates or those of our competitors;•our entry into or the loss of a significant collaboration;•regulatory or legal developments in the United States and other countries, including changes in the health care payment systems;•our ability to obtain and maintain marketing approvals from the FDA or similar regulatory authorities outside the United States;•variations in our financial results or those of companies that are perceived to be similar to us;•changes in the structure of healthcare payment systems;•market conditions in the pharmaceutical and biotechnology sectors and issuance of new or changed securities analysts’ reports or recommendations;•general economic, industry and market conditions;•results of clinical trials conducted by others on drugs that would compete with our product candidates;•developments or disputes concerning patents or other proprietary rights;•public concern over our product candidates or any products approved in the future;•litigation;•communications from government officials regarding health care costs or pharmaceutical pricing;•future sales or anticipated sales of our common stock by us or our stockholders; and•the other factors described in this “Risk Factors” section.In addition, the stock markets, and in particular, the NASDAQ Global Market, have experienced extreme price and volume fluctuations that have affected and continue to affect themarket prices of equity securities of many pharmaceutical companies. The realization of any of the above risks or any of a broad range of other risks, including those described inthese “Risk Factors” could have a dramatic and material adverse impact on the market price of our common stock.We may be unable to successfully integrate new products or businesses we may acquire.We intend to expand our product pipeline by pursuing acquisition of pharmaceutical products. If an acquisition is consummated, including the extent to which we exercise our optionto acquire Censa, the integration of the acquired business, product or other assets into our company may also be complex and time- consuming and, if such businesses, productsand assets are not successfully integrated, we may not achieve the anticipated benefits, cost-savings or growth opportunities. Potential difficulties that may be encountered in theintegration process include the following:•integrating personnel, operations and systems, while maintaining focus on producing and delivering consistent, high quality products;•coordinating geographically dispersed organizations;•distracting employees from operations;•retaining existing customers and attracting new customers; and•managing inefficiencies associated with integrating the operations of the Company.Furthermore, these acquisitions and other arrangements, even if successfully integrated, may fail to further our business strategy as anticipated, expose us to increased competitionor challenges with respect to our products or geographic markets, and expose us to additional liabilities32Table of Contentsassociated with an acquired business, product, technology or other asset or arrangement. Any one of these challenges or risks could impair our ability to realize any benefit from ouracquisitions or arrangements after we have expended resources on them.If we are unable to maintain an effective and specialized sales force, we will not be able to commercialize our products successfully.In order to successfully commercialize our products, we have built a specialized sales force. Factors that may hinder our ability to successfully market and commercially distribute ourproducts include:•inability of sales personnel to obtain access to or convince adequate numbers of physicians to prescribe our products;•inability to recruit, retain and effectively manage adequate numbers of effective sales personnel;•lack of complementary products to be offered by sales personnel, which may put us at a competitive disadvantage relative to companies that have more extensive productlines; and•unforeseen delays, costs and expenses associated with maintaining our sales organization.If we are unable to maintain our sales force for our products, we may not be able to generate sufficient product revenue.We will need to continue to expend significant time and resources to train our sales forces to be credible, persuasive and compliant in discussing our products with the specialiststreating the patients indicated under the product’s label. In addition, if we are unable to effectively train our sales force and equip them with effective marketing materials our abilityto successfully commercialize our products could be diminished, which would have a material adverse effect on our business, results of operations and financial condition.Product liability lawsuits against us could cause us to incur substantial liabilities and to limit commercialization of any products that we may develop.Our business exposes us to potential liability risks inherent in the research, development, manufacturing and marketing of pharmaceutical products. If any of our product candidatesin clinical trials or commercialized products harm people we may be subject to costly and damaging product liability claims. We have clinical trial insurance and commercial productliability coverage. However, this insurance may not be adequate to cover all claims. We may be exposed to product liability claims and product recalls, including those which mayarise from misuse or malfunction of, or design flaws in, such products, whether or not such problems directly relate to the products and services we have provided. If we cannotsuccessfully defend ourselves against claims that our product candidates or products caused injuries, we will incur substantial liabilities. Regardless of merit or eventual outcome,liability claims may result in:•decreased demand for any product candidates or products that we may develop;•damage to our reputation;•regulatory investigations that could require costly recalls or product modifications;•withdrawal of clinical trial participants;•costs to defend the related litigation;•substantial monetary awards to trial participants or patients, including awards that substantially exceed our product liability insurance, which we would then be required topay from other sources, if available, and would damage our ability to obtain liability insurance at reasonable costs, or at all, in the future;•loss of revenue;•the diversion of management’s attention from managing our business; and•the inability to commercialize any products that we may develop.A successful product liability claim or a series of claims brought against us could cause our stock price to fall and, if judgments exceed our insurance coverage, could decrease ouravailable cash and adversely affect our business.We are involved in certain litigation matters, any of which could result in substantial costs, divert management's attention and otherwise have a material adverseeffect on our business, operating results or financial condition.We are involved in certain litigation matters, including those described in Note 10 of the Consolidated Financial Statements included in this report. Although we intend to vigorouslydefend our interests in each matter, there is no guarantee that we will be successful and we may have to pay damages awards or otherwise may enter into settlementarrangements in connection with such matters. Any such payments or settlement arrangements could have material adverse effects on our business, operating results or financialcondition. Even if we are successful in defending our interests in each matter, litigation with respect to such matters could result in substantial costs and significant adverse impact onour reputation and divert management's attention and resources, which could have a material adverse effect on our business, operating results or financial condition.33Table of ContentsWe are subject to significant ongoing regulatory obligations and oversight, which may result in significant additional expense and may limit our commercialsuccess.We are subject to significant ongoing regulatory obligations, such as safety reporting requirements and additional post-marketing obligations, including regulatory oversight of thepromotion and marketing of our products. In addition, the manufacture, quality control, labeling, packaging, safety surveillance, adverse event reporting, storage and recordkeepingfor our products are subject to extensive and ongoing regulatory requirements. If we become aware of previously unknown problems with any of our products, a regulatory agencymay impose restrictions on our products, our contract manufacturers or us. If we, our products and product candidates, or the manufacturing facilities for our products and productcandidates fail to comply with applicable regulatory requirements, a regulatory agency, including the FDA, may send enforcement letters, mandate labeling changes, suspend orwithdraw regulatory approval, suspend any ongoing clinical trials, refuse to approve pending applications or supplements filed by us, suspend or impose restrictions onmanufacturing operations, request a recall of, seize or detain a product, seek criminal prosecution or an injunction, or impose civil or criminal penalties or monetary fines. In suchinstances, we could experience a significant drop in the sales of the affected products, our product revenues and reputation in the marketplace may suffer, and we could becomethe target of lawsuits.We are also subject to regulation by national, regional, state and local agencies, including but not limited to the FDA, Centers for Medicare and Medicaid Services, Department ofJustice, the Federal Trade Commission, the Office of Inspector General of the U.S. Department of Health and Human Services and other regulatory bodies. The FDC Act, SocialSecurity Act, Public Health Service Act and other federal and state statutes and regulations govern to varying degrees the research, development, manufacturing and commercialactivities relating to prescription pharmaceutical products, including preclinical testing, clinical research, approval, production, labeling, sale, distribution, post-market surveillance,advertising, dissemination of information, promotion, marketing, and pricing to government purchasers and government health care programs. Our manufacturing partners aresubject to many of the same requirements.Companies may not promote drugs for “off-label” uses-that is, uses that are not described in the product’s labeling and that differ from those approved by the FDA or otherapplicable regulatory agencies. A company that is found to have improperly promoted off-label uses may be subject to significant liability, including civil and administrative remediesas well as criminal sanctions. In addition, management’s attention could be diverted from our business operations and our reputation could be damaged.The federal health care program Anti-Kickback statute prohibits, among other things, knowingly and willfully offering, paying, soliciting, or receiving remuneration to induce or inreturn for purchasing, leasing, ordering or arranging for the purchase, lease or order of any health care item or service reimbursable under Medicare, Medicaid or other federallyfinanced healthcare programs. This statute has been interpreted broadly to apply to arrangements that pharmaceutical companies have with prescribers, purchasers and formularymanagers, among others. Further, the PPACA, among other things, amends the intent requirement of the federal anti-kickback statute so that a person or entity no longer needs tohave actual knowledge of this statute or specific intent to violate it. In addition, the PPACA provides that the government may assert that a claim including items or services resultingfrom a violation of the federal anti-kickback statute constitutes a false or fraudulent claim for purposes of the civil False Claims Act. Although there are a number of statutoryexceptions and regulatory safe harbors under the federal anti-kickback statute protecting certain common manufacturer business arrangements and activities from prosecution, theexceptions and safe harbors are drawn narrowly and an arrangement must meet all of the conditions specified in order to be fully protected from scrutiny under the federal anti-kickback statute. We seek to comply with the exceptions and safe harbors whenever possible, but our practices, such as our patient assistance programs and prompt pay discountswith certain customers, may not in all cases meet all of the criteria for protection from anti-kickback liability and may be subject to scrutiny.The federal false claims laws, including the federal False Claims Act, prohibit any person or entity from knowingly presenting, or causing to be presented, a false claim for paymentto the federal government, or knowingly making, or causing to be made, a false statement to get a false claim paid. Many pharmaceutical and other health care companies havebeen investigated and have reached substantial financial settlements with the federal government under the federal False Claims Act for a variety of alleged marketing activities,including providing free product to customers with the expectation that the customers would bill federal programs for the product; providing consulting fees, grants, free travel, andother benefits to physicians to induce them to prescribe the company’s products; and inflating prices reported to private price publication services, which may be used by states toset drug payment rates under government health care programs. Companies have been prosecuted for causing false claims to be submitted because of the marketing of theirproducts for unapproved uses. Pharmaceutical and other health care companies have also been prosecuted on other legal theories of Medicare and Medicaid fraud.Legislative and regulatory proposals have been made to expand post-approval requirements and restrict sales and promotional activities for pharmaceutical products. It is not clearwhether additional legislative changes will be enacted, or whether the FDA regulations, guidance or interpretations will be changed, or what the impact of such changes on themarketing approvals of any Retrophin products, if any, may be. In addition, increased scrutiny by the U.S. Congress of the FDA’s approval process may significantly delay or preventmarketing approval, as well as subject Retrophin to more stringent product labeling and post-marketing testing and other requirements.Many states also have statutes or regulations similar to the federal Anti-Kickback Statute and False Claims Act and civil monetary penalty laws, which apply to items and servicesreimbursed under Medicaid and other state programs, or, in several states, which apply regardless of the payer. In addition, several states require pharmaceutical companies toimplement compliance programs or marketing codes as does the U.S. Department of Health and Human ServicesWe also could become subject to government investigations and related subpoenas. Such subpoenas are often associated with previously filed qui tam actions, or lawsuits filedunder seal under the federal False Claims Act. Qui tam actions are brought by private plaintiffs suing on behalf of the federal government for alleged violations of the federal FalseClaims Act. The time and expense associated with responding to such subpoenas, and any related qui tam or other actions, may be extensive, and we cannot predict the results ofour review of the responsive documents and underlying34Table of Contentsfacts or the results of such actions. Responding to government investigations, defending any claims raised, and any resulting fines, restitution, damages and penalties, settlementpayments or administrative actions, as well as any related actions brought by stockholders or other third parties, could have a material impact on our reputation, business andfinancial condition and divert the attention of our management from operating our business.The number and complexity of both federal and state laws continues to increase, and additional governmental resources are being added to enforce these laws and to prosecutecompanies and individuals who are believed to be violating them. In particular, the PPACA includes a number of provisions aimed at strengthening the government’s ability to pursueanti-kickback and false claims cases against pharmaceutical manufacturers and other healthcare entities, including substantially increased funding for healthcare fraud enforcementactivities, enhanced investigative powers, amendments to the federal False Claims Act that make it easier for the government and whistleblowers to pursue cases for allegedkickback and false claim violations and, for payments made on or after August 1, 2013, public reporting of payments by pharmaceutical manufacturers to physicians and teachinghospitals nationwide. While it is too early to predict the full effect these changes will have on our business, we anticipate that government scrutiny of pharmaceutical sales andmarketing practices will continue for the foreseeable future and subject us to the risk of further government investigations and enforcement actions. Responding to a governmentinvestigation or enforcement action would be expensive and time-consuming, and could have a material adverse effect on our business, financial condition, results of operations andgrowth prospects.The U.S. Foreign Corrupt Practices Act, and similar worldwide anti-bribery laws generally prohibit companies and their intermediaries from making improper payments togovernment officials for the purpose of obtaining or retaining business. Our policies mandate compliance with these anti-bribery laws. We operate in parts of the world that haveexperienced governmental corruption to some degree and in certain circumstances, strict compliance with antibribery laws may conflict with local customs and practices or mayrequire us to interact with doctors and hospitals, some of which may be state controlled, in a manner that is different than in the United States. We cannot assure you that ourinternal control policies and procedures will protect us from reckless or criminal acts committed by our employees or agents. Violations of these laws, or allegations of such violations,could disrupt our business and result in criminal or civil penalties or remedial measures, any of which could have a material adverse effect on our business, financial condition andresults of operations and could cause the market value of our common stock to decline.The federal Health Insurance Portability and Accountability Act of 1996 ("HIPAA"), created new federal criminal statutes that prohibit, among other actions, knowingly and willfullyexecuting, or attempting to execute, a scheme to defraud any healthcare benefit program, including private third-party payers, and knowingly and willfully falsifying, concealing orcovering 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.Like the federal anti-kickback statute, the PPACA amended the intent standard for certain healthcare fraud provisions under HIPAA such that a person or entity no longer needs tohave actual knowledge of the statute or specific intent to violate it in order to have committed a violation.Additionally, the civil monetary penalties statute imposes penalties against any person or entity that, among other things, is determined to have presented or caused to be presenteda claim to a federal health program that the person knows or should know is for an item or service that was not provided as claimed or is false or fraudulent.Also, many states have similar fraud and abuse statutes or regulations, including state anti-kickback and false claims laws, that apply to items and services reimbursed underMedicaid and other state programs, or, in several states, apply regardless of the payer.In addition, we may be subject to data privacy and security regulation by both the federal government and the states in which we conduct our business. HIPAA, as amended by theHealth Information Technology for Economic and Clinical Health Act ("HITECH"), and their respective implementing regulations, imposes specified requirements relating to theprivacy, security and transmission of individually identifiable health information. Among other things, HITECH, through its implementing regulations, makes certain of HIPAA’s privacyand security standards directly applicable to business associates, defined as a person or organization, other than a member of a covered entity’s workforce, that creates, receives,maintains or transmits protected health information for or on behalf of a covered entity for a function or activity regulated by HIPAA. International data protection laws also imposestrict obligations on the ability to process health related and other personal information of citizens of member states, including in relation to collection, analysis and transfer. The EUGeneral Data Protection Regulation, which was officially adopted in April 2016 and will be applicable in May 2018, will introduce new data protection requirements in the EuropeanUnion, as well as substantial fines for breaches of the data protection rules. The EU General Data Protection Regulation will increase our responsibility and liability in relation topersonal data that we process, and we may be required to put in place additional mechanisms to ensure compliance with the new EU data protection rules.Failure to comply with U.S. and international data protection laws and regulations could result in government enforcement actions (which could include civil or criminal penalties),private litigation, and/or adverse publicity and could negatively affect our operating results and business. Moreover, patients about whom we or our partners obtain information, aswell as the providers who share this information with us, may contractually limit our ability to use and disclose the information. Claims that we have violated individuals’ privacy rights,failed to comply with data protection laws, or breached our contractual obligations, even if we are not found liable, could be expensive and time-consuming to defend and couldresult in adverse publicity that could harm our business.Additionally, the federal Physician Payments Sunshine Act within the PPACA, and its implementing regulations, require that certain manufacturers of drugs, devices, biologicals andmedical supplies to report annually information related to certain payments or other transfers of value made or distributed to physicians and teaching hospitals, or to entities orindividuals at the request of, or designated on behalf of, the physicians and teaching hospitals and to report annually certain ownership and investment interests held by physiciansand their immediate family members. Moreover, the Drug Supply Chain Security Act imposes new obligations on manufacturers of pharmaceutical products related to producttracking and tracing. Legislative and regulatory proposals have been made to expand post-approval requirements and restrict sales and promotional activities for pharmaceuticalproducts. We are not sure whether additional legislative changes will be enacted, or whether the current regulations, guidance or35Table of Contentsinterpretations will be changed, or what the impact of such changes on our business, if any, may be. Several states now require pharmaceutical companies to report their expensesrelating to the marketing and promotion of pharmaceutical products in those states and to report gifts and payments to certain individual health care providers in those states. Someof these states also prohibit certain marketing-related activities, including the provision of gifts, meals, and other items to certain health care providers.If we or any of our partners fail to comply with applicable regulatory requirements, we or they could be subject to a range of regulatory actions that could affect our or our partners'ability to commercialize our products and could harm or prevent sales of the affected products, or could substantially increase the costs and expenses of commercializing andmarketing our products. Any threatened or actual government enforcement action could also generate adverse publicity and require that we devote substantial resources that couldotherwise be used in other aspects of our business. Compliance with applicable federal and state laws is difficult and time consuming, and companies that violate them may facesubstantial penalties. The potential sanctions include criminal fines, civil monetary penalties, administrative penalties, disgorgement, exclusion from participation in federal health careprograms, individual imprisonment, injunctions, recall or seizure of products, total or partial suspension of production, reputational harm, administrative burdens, additional oversightand reporting obligations if we become subject to a corporate integrity agreement or similar agreement to resolve allegation of non-compliance with these laws, diminished profitsand future earnings, and the curtailment or restructuring of our operations, and other sanctions. Because of the breadth of these laws, it is possible that some of our businessactivities could be subject to challenge under one or more of these laws. Such a challenge, irrespective of the underlying merits of the challenge or the ultimate outcome of thematter, could have a material adverse effect on our business, financial condition, results of operations and growth prospects.If we are not able to obtain and maintain required regulatory approvals, we will not be able to commercialize our products, and our ability to generate revenue willbe materially impaired.Our product candidates, once approved, and the activities associated with their manufacture, marketing, distribution, and sales are subject to extensive regulation by the FDA andother regulatory agencies in the United States and by comparable authorities in other countries. Failure to adhere to regulations set out by these bodies for one or more of ourcommercial products could prevent us from commercializing the product candidate in the jurisdiction of the regulatory authority. We have only limited experience in meeting theregulatory requirements incumbent on the sale of drugs in the United States and elsewhere, and expect to rely on third-parties to assist us in these processes. If these third partiesfail to adequately adhere to the regulations governing drug distribution and promotion we may be unable to sell our products, which could have a material effect on our ability togenerate revenue.Our product candidates and the activities associated with their development and commercialization, including testing, manufacture, safety, efficacy, recordkeeping, labeling, storage,approval, advertising, promotion, sale and distribution, are subject to comprehensive regulation by the FDA and other regulatory agencies in the United States and by comparableauthorities in other countries. Failure to obtain regulatory approval for a product candidate will prevent us from commercializing the product candidate in the jurisdiction of theregulatory authority. We have only limited experience in filing and prosecuting the applications necessary to obtain regulatory approvals and expect to rely on third-party contractresearch organizations to assist us in this process.Securing FDA approval requires the submission of extensive preclinical and clinical data and supporting information to the FDA for each therapeutic indication to establish theproduct candidate’s safety and efficacy. Securing FDA approval also requires the submission of information about the product manufacturing process to, and successful inspectionof manufacturing facilities by, the FDA. Our future products may not be effective, may be only moderately effective or may prove to have undesirable or unintended side effects,toxicities or other characteristics that may preclude our obtaining regulatory approval or prevent or limit commercial use.Our product candidates may fail to obtain regulatory approval for many reasons, including:•our failure to demonstrate to the satisfaction of the FDA or comparable regulatory authorities that a product candidate is safe and effective for a particular indication;•the results of clinical trials may not meet the level of statistical significance required by the FDA or comparable regulatory authorities for approval;•our inability to demonstrate that a product candidate’s benefits outweigh its risks;•our inability to demonstrate that the product candidate presents an advantage over existing therapies;•the FDA’s or comparable regulatory authorities’ disagreement with the manner in which we interpret the data from preclinical studies or clinical trials;•failure of the third-party manufacturers with which we contract for clinical or commercial supplies to satisfactorily complete an FDA pre-approval inspection of the facility orfacilities at which the product is manufactured to assess compliance with the FDA’s cGMP regulations to assure that the facilities, methods and controls are adequate topreserve the drug’s identity, strength, quality and purity; and•a change in the approval policies or regulations of the FDA or comparable regulatory authorities or a change in the laws governing the approval process.The process of obtaining regulatory approvals is expensive, often takes many years, if approval is obtained at all, and can vary substantially based upon a variety of factors, includingthe type, complexity and novelty of the product candidates involved. Changes in regulatory approval policies during the development period, changes in or the enactment ofadditional statutes or regulations, or changes in regulatory review for each submitted product application may cause delays in the approval or rejection of an application. The FDAand non-United States regulatory authorities have36Table of Contentssubstantial discretion in the approval process and may refuse to accept any application or may decide that our data is insufficient for approval and require additional preclinical,clinical or other studies. In addition, varying interpretations of the data obtained from preclinical and clinical testing could delay, limit or prevent regulatory approval of a productcandidate. Any regulatory approval we ultimately obtain may be limited or subject to restrictions or post approval commitments that render the approved product not commerciallyviable. Any FDA or other regulatory approval of our product candidates, once obtained, may be withdrawn, including for failure to comply with regulatory requirements or if clinicalor manufacturing problems follow initial marketing.Our internal computer systems, or those of our CROs or other contractors and vendors who host our applications or consultants, may fail or suffer securitybreaches, which could result in a material disruption of our product development programs.Despite the implementation of security measures, our internal computer systems and those of our CROs and other contractors or vendors who host our applications and those ofour consultants are vulnerable to damage or disruption from computer viruses, software bugs, unauthorized access including cyber-attack, natural disasters, terrorism, war, andtelecommunication, equipment and electrical failures. While we have not, to our knowledge, experienced any significant system failure, accident or security breach to date, if such anevent were to occur and cause interruptions in our operations, it could result in a material disruption of our programs. For example, the loss of clinical trial data from completed orongoing clinical trials for any of our product candidates could result in delays in our regulatory approval efforts and significantly increase our costs to recover or reproduce the data.To the extent that any disruption or security breach results in a loss of or damage to our data or applications, or inappropriate disclosure or theft of confidential or proprietaryinformation, we could incur liability, the further development of our product candidates could be delayed, our competitive position could be compromised, or our business reputationcould be harmed.We face risks related to research and the ability to develop new drugs.Our growth and survival depends on our ability to consistently discover, develop and commercialize new products and find new and improve on existing technology and platforms.As such, if we fail to make sufficient investments in research, be attentive to consumer needs or do not focus on the most advanced technology, our current and future productscould be surpassed by more effective or advanced products of other companies.The recently passed comprehensive tax reform bill could adversely affect our business and financial condition.On December 22, 2017, President Trump signed into law new legislation that significantly revises the Internal Revenue Code of 1986, as amended. The newly enacted federalincome tax law, among other things, contains significant changes to corporate taxation, including reduction of the corporate tax rate from a top marginal rate of 35% to a flat rate of21%, limitation of the tax deduction for interest expense to 30% of adjusted earnings (except for certain small businesses), limitation of the deduction for net operating losses to 80%of current year taxable income and elimination of net operating loss carrybacks, one time taxation of offshore earnings at reduced rates regardless of whether they are repatriated,elimination of U.S. tax on foreign earnings (subject to certain important exceptions), immediate deductions for certain new investments instead of deductions for depreciationexpense over time, and modifying or repealing many business deductions and credits. Notwithstanding the reduction in the corporate income tax rate, the overall impact of the newfederal tax law is uncertain and our business and financial condition could be adversely affected. In addition, it is uncertain if and to what extent various states will conform to thenewly enacted federal tax law. The impact of this tax reform on holders of our common stock is also uncertain and could be adverse. We urge our stockholders to consult with theirlegal and tax advisors with respect to this legislation and the potential tax consequences of investing in or holding our common stock.Our effective tax rate may fluctuate, and we may incur obligations in tax jurisdictions in excess of accrued amounts.Our effective tax rate is derived from a combination of applicable tax rates in the various places that we operate. In preparing our financial statements, we estimate the amount oftax that will become payable in each of such places. Nevertheless, our effective tax rate may be different than experienced in the past due to numerous factors, including passageof the newly enacted federal income tax law, changes in the mix of our profitability from state to state, the results of examinations and audits of our tax filings, our inability to secureor sustain acceptable agreements with tax authorities, changes in accounting for income taxes and changes in tax laws. Any of these factors could cause us to experience aneffective tax rate significantly different from previous periods or our current expectations and may result in tax obligations in excess of amounts accrued in our financial statements.Our ability to use net operating losses to offset future taxable income may be subject to limitations.As of December 31, 2017, we had federal net operating loss carryforwards of $5.2 million. These net operating loss carryforwards could expire unused and be unavailable to offsetfuture income tax liabilities. Under the newly enacted federal income tax law, federal net operating losses incurred in 2018 and in future years may be carried forward indefinitely,but the deductibility of such federal net operating losses is limited. In addition, under Section 382 of the Internal Revenue Code of 1986, as amended, and corresponding provisionsof state law, if a corporation undergoes an “ownership change,” which is generally defined as a greater than 50% change, by value, in its equity ownership over a three-year period,the corporation’s ability to use its pre-change net operating loss carryforwards and other pre-change tax attributes to offset its post-change income or taxes may be limited. It ispossible that we have experienced an ownership change limitation. We may experience ownership changes in the future as a result of subsequent shifts in our stock ownership,some of which may be outside of our control. If an ownership change occurs and our ability to use our net operating loss carryforwards is materially limited, it would harm our futureoperating results by effectively increasing our future tax obligations.37Table of ContentsRisks Related to our Indebtedness and InvestmentsOur indebtedness could adversely affect our financial condition.As of December 31, 2017, we had approximately $46.0 million of total debt outstanding, classified as long term. The total debt outstanding relates to a Note Purchase Agreementdated May 29, 2014 for the private placement of $46.0 million aggregate senior secured notes (the “Notes”). As a result of our indebtedness, a portion of our cash flow will berequired to pay interest and principal on the Notes if the Notes are not converted to shares of common stock prior to maturity. We may not generate sufficient cash flow fromoperations or have future borrowings available to enable us to repay our indebtedness or to fund other liquidity needs.Our indebtedness pursuant to the Notes could have important consequences. For example, it could:•make it more difficult for us to satisfy our obligations with respect to any other debt we may incur in the future;•increase our vulnerability to general adverse economic and industry conditions;•require us to dedicate a substantial portion of our cash flow from operations to payments on our indebtedness and related interest, thereby reducing the availability of ourcash flow to fund working capital, capital expenditures and other general corporate purposes;•limit our flexibility in planning for, or reacting to, changes in our business and the industry in which we operate;•increase our cost of borrowing;•place us at a competitive disadvantage compared to our competitors that may have less debt; and•limit our ability to obtain additional financing for working capital, capital expenditures, acquisitions, debt service requirements or general corporate purposes.We expect to use cash flow from operations and outside financings to meet our current and future financial obligations, including funding our operations, debt service and capitalexpenditures. Our ability to make these payments depends on our future performance, which will be affected by financial, business, economic and other factors, many of which wecannot control. Our business may not generate sufficient cash flow from operations in the future, which could result in our being unable to repay indebtedness, or to fund otherliquidity needs. If we do not generate sufficient cash from operations, we may be forced to reduce or delay our business activities and capital expenditures, sell assets, obtainadditional debt or equity capital or restructure or refinance all or a portion of our debt, including the Notes, on or before maturity. We cannot make any assurances that we will beable to accomplish any of these alternatives on terms acceptable to us, or at all. In addition, the terms of existing or future indebtedness may limit our ability to pursue any of thesealternatives.A default under the Notes may have a material adverse effect on our financial condition.If an event of default under the Notes occurs, the principal amount of the Notes, plus accrued and unpaid interest (including additional interest, if any) may be declared immediatelydue and payable, subject to certain conditions set forth in the indenture governing such notes. Events of default include, but are not limited to:•failure to pay (for more than 30 days) interest when due;•failure to pay principal when due;•failure to deliver shares of common stock upon conversion of a Note;•failure to provide notice of a fundamental change;•acceleration on our other indebtedness in excess of $10 million (other than indebtedness that is non-recourse to us); or•certain types of bankruptcy or insolvency involving us.Accordingly, the occurrence of a default under the Notes, unless cured or waived, may have a material adverse effect on our results of operations.The Notes are structurally subordinated to all obligations of our subsidiaries.The Notes are our obligations and are structurally subordinated to all indebtedness and other obligations, including trade payables, of our subsidiaries. The effect of this structuralsubordination is that, in the event of a bankruptcy, liquidation, dissolution, reorganization or similar proceeding involving a subsidiary which is not a guarantor of the Notes, the assetsof the affected entity could not be used to pay noteholders until after all other claims against that subsidiary, including trade payables, have been fully paid.Provisions of the Notes could discourage an acquisition of us by a third party.Certain provisions of the Notes could make it more difficult or more expensive for or prevent a third party to acquire us. Upon the occurrence of certain transactions constituting afundamental change, holders of the Notes will have the right, at their option, to require us to repurchase all of their Notes or any portion of the principal amount of such Notes inintegral multiples of $1,000. We may also be required to increase the conversion rate for conversions in connection with certain fundamental changes.38Table of ContentsConversion of the Notes may dilute the ownership interest of existing stockholders, including holders who had previously converted their Notes.To the extent we issue shares of common stock upon conversion of the Notes, the conversion of some or all of the Notes will dilute the ownership interests of existing stockholders.Any sales in the public market of shares of the common stock issuable upon such conversion could adversely affect prevailing market prices of shares of our common stock. Inaddition, the existence of the Notes may encourage short selling by market participants because the conversion of the Notes could depress the price of shares of our common stock.ITEM 1B. UNRESOLVED STAFF COMMENTSNone.ITEM 2. PROPERTIESWe lease the following locations to conduct our business:LocationAddressLease ExpirationSquare FeetSan Diego, California (corporate headquarters)3721/3661 Valley Centre DriveSuites 200, 225, 250 & 275July 31, 202445,446We believe these facilities are adequate to conduct our business.ITEM 3. LEGAL PROCEEDINGSThe information required by this Item is incorporated herein by reference to Note 10 of the Consolidated Financial Statements included in this report.ITEM 4. MINE SAFETY DISCLOSURESNot applicable.39Table of ContentsPART IIITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS ANDISSUER PURCHASES OF EQUITY SECURITIESMarket InformationOur common stock is listed for quotation on the NASDAQ Global Market under the trading symbol “RTRX” and is part of the NASDAQ Biotechnology Index (NASDAQ: NBI).As of February 23, 2018, the last reported sale price of our Common Stock as reported by the NASDAQ was $23.85. The following table sets forth the high and low sales pricesfor our common stock for each full quarterly period within the two most recent fiscal years as reported by the NASDAQ.Quarter Ending High LowFiscal Year 2017 First Quarter $22.36 $17.00Second Quarter $20.21 $15.55Third Quarter $25.44 $18.70Fourth Quarter $26.44 $20.66Fiscal Year 2016 First Quarter $19.24 $11.60Second Quarter $19.32 $13.31Third Quarter $24.57 $15.88Fourth Quarter $24.20 $16.07As of February 23, 2018, we had approximately 195 holders of record of our common stock.Performance GraphThe following is not deemed “filed” with the Securities and Exchange Commission and is not to be incorporated by reference into any filing we make under the Securities Act of1933, as amended, whether made before or after the date hereof and irrespective of any general incorporation by reference language in such filing.Our common stock is traded on the NASDAQ Global Market and is a component of both the NASDAQ Composite Index and the NASDAQ Biotechnology Index. The total return forour common stock and for each index assumes the reinvestment of dividends, although dividends have never been declared on our common stock, and is based on the returns ofthe component companies weighted according to their capitalizations as of the end of each monthly period. The NASDAQ-Composite tracks the aggregate price performance ofequity securities of companies traded on the NASDAQ National Market. The NASDAQ Biotechnology Index contains securities and tracks the aggregate price performance of equitysecurities of NASDAQ-listed companies classified according to the Industry Classification Benchmark as either Biotechnology or Pharmaceuticals which also meet other eligibilitycriteria. The comparisons shown in the graph are based upon historical data and we caution that the stock price performance shown in the graph is not indicative of, nor intended toforecast, the potential future performance of our stock.40Table of ContentsDividendsSince inception we have not paid any dividends on our common stock. We currently do not anticipate paying any cash dividends in the foreseeable future on our common stock.Although we intend to retain our earnings, if any, to finance the exploration and growth of our business, our Board of Directors will have the discretion to declare and pay dividendsin the future. Payment of dividends in the future will depend upon our earnings, capital requirements and other factors which our Board of Directors may deem relevant.ITEM 6. SELECTED FINANCIAL DATAThe following table presents selected historical financial data of the Company for the periods indicated. The selected historical financial information is derived from the auditedConsolidated Financial Statements of the Company referred to under Item 8 of this Annual Report on Form 10-K, and previously published historical financial statements. Thefollowing selected financial data should be read in conjunction with Item 7 - Management’s Discussion and Analysis of Financial Condition and Results of Operations, and theCompany’s Consolidated Financial Statements, including the notes thereto, included elsewhere herein. 41Table of ContentsSelected historical financial data (in thousands, except share and per share amounts): For the year ended December 31,Consolidated Statement of Operations:2017 2016 2015 2014 2013Net product sales$154,937 $133,591 $99,892 $28,203 $—Total operating expenses208,728 191,805 150,640 108,011 24,773Operating loss(53,791) (58,214) (50,748) (79,808) (24,773)Total other income (expenses), net(4,572) 632 156,215 (33,590) (9,776)Income (Loss) before benefit for income taxes(58,363) (57,582) 105,467 (113,398) (34,549)Income tax benefit (provision)(1,368) 9,679 11,770 2,460 (76)Net income (loss)$(59,731) $(47,903) $117,237 $(110,938) $(34,625)Per Share Data: Net Income (loss) per common share, basic$(1.54) $(1.29) $3.49 $(4.43) $(2.44)Net Income (loss) per common share, diluted$(1.54) $(1.29) $3.17 $(4.43) $(2.44)Weighted average common shares outstanding, basic38,769,816 36,997,865 33,560,249 25,057,509 14,205,264Weighted average common shares outstanding, diluted38,769,816 38,288,012 37,581,439 25,057,509 14,205,264 As of December 31,Balance Sheet data:2017 2016 2015 2014 2013Cash, cash equivalents and marketable securities$300,630 $255,873 $229,604 $27,760 $(6,130)Working capital (deficit)240,139 249,090 214,951 (70,205) (29,064)Total assets520,346 525,282 512,264 134,973 20,499Long-term debt45,077 44,422 43,766 42,790 —Total stockholders’ equity (deficit)$293,134 $307,767 $299,971 $(37,251) $(19,667)Note: Cash dividends were not paid during the above periods.ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OFOPERATIONS The following discussion should be read in conjunction with our audited Consolidated Financial Statements, including the notes thereto.OverviewWe are a biopharmaceutical company headquartered in San Diego, California, focused on identifying, developing and delivering life-changing therapies to people living with rarediseases.Research and Development Programs:FosmetpantotenateWe are developing fosmetpantotenate, a novel small molecule, as a potential treatment for PKAN. PKAN is a genetic neurodegenerative disorder that is typically diagnosed in thefirst decade of life. Consequences of PKAN include dystonia, dysarthria, rigidity, retinal degeneration, and severe digestive problems. PKAN is estimated to affect up to 5,000patients worldwide. There are currently no viable treatment options for patients with PKAN. Fosmetpantotenate is a phosphopantothenate replacement therapy that aims to restorelevels of this key substrate in PKAN patients. Certain international health regulators have approved the initiation of dosing fosmetpantotenate in PKAN patients under physician-initiated studies in accordance with local regulations in their respective countries.In 2015 and 2016 we filed an IND, completed the Phase I clinical trial and obtained both orphan drug and fast track designation in the United States. Additionally, we receivedorphan drug designation in the European Union and reached an agreement with the FDA under the Special Protocol Assessment (SPA) process for a Phase 3 clinical trial forPKAN. In July 2017, the first patient was dosed in the Phase 3 FORT (FOsmetpantotenate Replacement Therapy) study and enrollment continues.SparsentanSparsentan is an investigational product candidate which acts as both a potent ARB, as well as a selective ERA, with in vitro selectivity toward endothelin receptor type A. We havesecured a license to sparsentan from Ligand Pharmaceuticals, Inc. and BMS (who referred to it as DARA). We are initially developing sparsentan as a treatment for FSGS, which isa leading cause of end-stage renal disease and nephrotic syndrome (“NS”). There are currently no U.S. Food and Drug Administration (the "FDA") approved treatments for FSGSand off-label resources are limited to ACE/ARBs, steroids, and immunosuppressant agents, which are effective in only a subset of patients. Every year approximately 5,400 patientsare diagnosed with FSGS and we estimate that there are up to 40,000 FSGS patients in the United States with approximately half of them being42Table of Contentscandidates for sparsentan. In 2015 and 2016 we received orphan drug designation in the United States and European Union and received positive data from our Phase 2 DUETstudy of sparsentan for the treatment of FSGS. In 2017, we had an End of Phase 2 meeting with the FDA regarding the regulatory pathway for sparsentan as a treatment forFSGS, following which we confirmed our plan to conduct a single Phase 3 clinical trial to serve as the basis of a New Drug Application ("NDA") filing for sparsentan for the treatmentof FSGS. During 2017 and in early 2018, we had interactions with the FDA regarding the statistical modeling necessary to support the trial design's eligibility for the Subpart Haccelerated approval pathway. Following these interactions, we confirmed our planned trial design. We expect that the trial will include an interim analysis of proteinuria as asurrogate endpoint and that if this interim analysis shows a substantial effect on proteinuria reduction, that the data could serve as a basis for applying for accelerated approval ofsparsentan for the treatment of FSGS pursuant to Subpart H of the FDA regulations. The confirmatory endpoint of the study is expected to compare changes from baseline ofestimated glomerular filtration rate, or eGFR. We expect to initiate the clinical trial in the second quarter of 2018.We recently announced the exploration of a second indication, IgAN, for sparsentan. IgAN is characterized by hematuria, proteinuria, and variable rates of progressive renal failure.With an estimated prevalence of up to 165,000 in the United States and more in Europe and Asia, IgAN is the most common primary glomerular disease. Most patients arediagnosed between the ages of 16 and 35, with up to 40% progressing to end stage renal disease within 15 years. There are currently no FDA approved treatments for IgAN. Thecurrent standard of care is renin-angiotensin-aldosterone system (RAAS) blockade with immunosuppression also being commonly used for patients with significant proteinuria orrapidly progressive glomerulonephritis. We expect to initiate a clinical trial of sparsentan in IgAN during 2018.CNSA-001On December 16, 2017, we entered into a Future Acquisition Right and Joint Development Agreement with Censa, which became effective on January 4, 2018 upon thesatisfaction of certain conditions. Pursuant to the agreement, we agreed to fund certain development activities of Censa’s CNSA-001 program, in an aggregate amount expected tobe approximately $16 million through proof of concept, and has the right, but not the obligation, to acquire Censa (the “Option”) on the terms and subject to the conditions set forthin a separate Agreement and Plan of Merger (the “Merger Agreement”). In exchange for the Option, on January 8, 2018, we paid Censa $10 million, $9 million of which wasdistributed to Censa’s equityholders, and are required to pay Censa an additional $5 million upon Censa’s completion of a specified development milestone set forth in the OptionAgreement, all of which will be distributed to Censa’s equityholders.If we exercise the Option, pursuant to the terms of the Merger Agreement, we will acquire Censa for $65 million in upfront consideration, subject to certain adjustments, paid as acombination of 20% in cash and 80% in shares of our common stock, valued at a fixed price of $21.40 per share; provided, however, that Censa may elect on behalf of itsequityholders to receive the upfront consideration in 100% cash if the average price per share of our common stock for the ten trading days ending on the date we provide a noticeof interest to exercise the Option is less than $19.26. In addition to the upfront consideration, if we exercise the Option and acquire Censa, we would be required to make furthercash payments to Censa’s equityholders of up to an aggregate of $25 million if the CNSA-001 program achieves specified development and commercial milestones.Censa, a privately held biotechnology company focused on developing therapies for the orphan metabolic diseases, is developing CNSA-001 for the treatment of PKU. CNSA-001is an orally bioavailable form of a natural precursor of BH4 with the potential to provide improved Phe reduction in patients with PKU when compared to BH4. Preclinical researchhas suggested CNSA-001 may provide improved bioavailability, plasma stability and tissue exposure, leading to higher intracellular BH4 levels and subsequent greater Phereduction when compared to the current standard of care in PKU. In pre-clinical models, CNSA-001 has also shown an ability to cross the blood-brain barrier which, if supported byclinical data, may lead to broader utility in additional indications such as primary BH4 deficiency (PBD) and Segawa syndrome. CNSA-001 is currently being evaluated in a singleascending dose (SAD) study and a Phase 2 proof of concept study in PKU is expected to commence in mid-2018.PKU is a rare, genetic metabolic condition in which the body cannot breakdown Phe due to a missing or defective phenylalanine hydroxylase (PAH) enzyme. High Phe levels canlead to developmental and physical growth delay, executive function impairment, seizures, and microcephaly caused by toxic Phe accumulation in the brain. PKU is typicallydiagnosed at birth.NGLY1 Deficiency Discovery EffortsN-glycanase deficiency, or NGLY1 deficiency, is an extremely rare genetic disorder believed to be caused by a deficiency in an enzyme called N-glycanase-1, which is encoded bythe gene NGLY1. The condition is characterized by symptoms such as developmental delays, seizures, complex hyperkinetic movement disorders, diminished reflexes and aninability to produce tears. There are no approved therapeutic options for NGLY1 deficiency, and current therapeutic strategies are limited to symptom management.In September 2017, we entered a three-way CRADA with the National Institutes of Health’s National Center for Advancing Translational Sciences (NCATS) and patient advocacyfoundation NGLY1.org to collaborate on research efforts aimed at the identification of potential small molecule therapeutics for NGLY1 deficiency.Liquid Ursodeoxycholic AcidLiquid ursodeoxycholic acid ("L-UDCA") is a liquid formulation of ursodeoxycholic acid being developed for the treatment of a rare liver disease called primary biliary cholangitis("PBC"). We obtained L-UDCA during 2016 with the intention of making L-UDCA commercially available to the subset of PBC patients who have difficulty swallowing. There are noliquid formulations of ursodeoxycholic acid currently approved by the FDA.43Table of ContentsWe currently sell the following three products:Chenodal (chenodiol tablets)Chenodal is a synthetic oral form of chenodeoxycholic acid, a naturally occurring primary bile acid synthesized from cholesterol in the liver, indicated for the treatment of radiolucentstones in well-opacifying gallbladders in patients in whom selective surgery would be undertaken except for the presence of increased surgical risk due to systemic disease or age.Chenodal administration is known to reduce biliary cholesterol and the dissolution of radiolucent gallstones through suppression of hepatic synthesis of cholesterol, cholic acid anddeoxycholic acid in the bile pool. Chenodal was first approved by the FDA in 1983 for the management of gallstones but its marketing was later discontinued due to lack ofcommercial success. In 2009, Nexgen Pharma Inc.'s ANDA for Chenodal was approved by the FDA for the treatment of gallstones; Chenodal is manufactured for ManchesterPharmaceuticals LLC ("Manchester") under this ANDA. Manchester subsequently obtained orphan drug designation for Chenodal for the treatment of CTX, a rare autosomalrecessive lipid storage disease, in 2010. Manchester was acquired by Retrophin in March 2014. For further discussion, see Note 3 of the Consolidated Financial Statements.While Chenodal is not labeled for CTX, it has been used as the standard of care for over three decades. We are working to obtain FDA approval of Chenodal for the treatment ofCTX. The prevalence of CTX is estimated in the literature to be as high as 1 in 70,000 in the overall population. Pathogenesis of CTX involves deficiency of the enzyme 27-hydroxylase (encoded by the gene CYP27A1), a rate-limiting enzyme in the synthesis of primary bile acids, including CDCA, from cholesterol. The disruption of primary bile acidsynthesis in CTX leads to toxic accumulation of cholesterol and cholestanol in most tissues. Most patients present with intractable diarrhea, premature cataracts, tendon xanthomas,atherosclerosis, and cardiovascular disease in childhood and adolescence. Neurological manifestations of the disease, including dementia and cognitive and cerebellar deficiencies,emerge during late adolescence and adulthood. Oral administration of CDCA has been shown to normalize primary bile acid synthesis in patients with CTX.Cholbam (cholic acid capsules)The FDA approved Cholbam (cholic acid capsules) in March 2015, the first FDA approved treatment for pediatric and adult patients with bile acid synthesis disorders due to singleenzyme defects, and for adjunctive treatment of patients with peroxisomal disorders (including Zellweger spectrum disorders). The effectiveness of Cholbam has beendemonstrated in clinical trials for bile acid synthesis disorders and the adjunctive treatment of peroxisomal disorders. The estimated incidence of bile acid synthesis disorders due tosingle enzyme defects is 1 to 9 per million live births.Thiola (tiopronin tablets)Thiola is approved by the FDA for the treatment of cystinuria, a rare genetic cystine transport disorder that causes high cystine levels in the urine and the formation of recurringkidney stones. The resulting long-term damage can cause loss of kidney function in addition to substantial pain and loss of productivity associated with renal colic and stone passage.The prevalence of cystinuria in the United States is estimated to be 10,000 to 12,000, indicating that there may be as many as 4,000 to 5,000 affected individuals with cystinuria inthe United States that would be candidates for Thiola. We are currently developing a new, more patient-friendly, formulation for which an NDA is expected in 2018.Financial OverviewResearch and Development CostsResearch and development costs include expenses related to sparsentan, fosmetpantotenate and our other pipeline programs. We expense all research and development costs asthey are incurred. Our research and development costs are comprised of salaries and bonuses, benefits, non-cash share based compensation, license fees, milestones underlicense agreements, costs paid to third-party contractors to perform research, conduct clinical trials, and develop drug materials and delivery methods, and associated overheadexpenses and facilities costs. Reimbursed research and development costs under collaborative arrangements are recorded as a reduction to research and development costs. Wecharge direct internal and external program costs to the respective development programs. We also incur indirect costs that are not allocated to specific programs because suchcosts benefit multiple development programs and allow us to increase our pharmaceutical development capabilities. These consist of internal shared resources related to thedevelopment and maintenance of systems and processes applicable to all of our programs.At any point in time, we typically have various early stage research and drug discovery projects. Our internal resources, employees and infrastructure are not directly tied to any oneresearch or drug discovery project and are typically deployed across multiple projects. As such, we do not maintain information regarding costs incurred for these early stageresearch and drug discovery programs on a project-specific basis.We routinely engage vendors and service providers for scientific research, clinical trial, regulatory compliance, manufacturing and other consulting services. We also make grants toresearch and non-profit organizations to conduct research which may lead to new intellectual properties that we may subsequently license under separately negotiated licenseagreements. Such grants may be funded in lump sums or installments.The following table summarizes our research and development expenses during the years ended December 31, 2017, 2016 and 2015. The internal costs include personnel, facilitycosts, and discovery and research related activities associated with our pipeline. The external program costs reflect external costs attributable to our clinical development candidatesand preclinical candidates selected for further development. Such expenses44Table of Contentsprimarily include third-party contract costs relating to clinical trial activities, nonclinical studies and manufacturing. For the Year Ended December 31, (in thousands) 2017 2016 2015External service provider costs: Fosmetpantotenate$16,571 $12,625 $7,631Sparsentan20,237 21,064 11,179Other product candidates331 1,407 1,053General15,827 10,958 6,754Total external service provider costs:52,966 46,054 26,617Internal personnel costs:25,202 24,768 23,809Total research and development$78,168 $70,822 $50,426 We expect our research and development expenses to increase during fiscal 2018 as we focus on clinical trials for our key product candidates, advance our discovery researchprojects into the preclinical stage and continue our early stage research. The process of conducting preclinical studies and clinical trials necessary to obtain regulatory approval iscostly and time consuming.Most of our product development programs are in clinical trials which are highly uncertain and may not result in approved products. Completion dates and completion costs can varysignificantly for each product candidate and are difficult to project. Given the uncertainty associated with clinical trial enrollments and the risks inherent in the development process,we are unable to determine the duration and completion costs of current or future clinical trials of our product candidates or if and to what extent we will generate revenues, if any,from the commercialization and sale of any of our product candidates.Selling, General and AdministrativeSelling, general and administrative expenses consist of salaries and bonuses, benefits, non-cash share based compensation, legal and other professional fees, rent, depreciationand amortization, travel, insurance, business development, sales and marketing programs, and other operating expenses.Other Income/ExpensesOther income/expenses consist of the change in fair value of derivative financial instruments, litigation settlement gain, interest income and expense, finance expense, bargainpurchase gain, loss on the extinguishment of debt, debt early payment penalty, gain on sale of assets, and miscellaneous other income/expenses.License AgreementsLigand License AgreementIn 2012, we entered into a license agreement with Ligand, granting us a worldwide license for the development, manufacture and commercialization of sparsentan, which we areinitially developing in connection with the treatment of FSGS. Under the license agreement, Ligand granted us a sublicense under certain of its patents and other intellectualproperty in connection with the development and commercialization of sparsentan. Under the license agreement, Ligand is obligated to transfer to us certain information, records,regulatory filings, materials and inventory controlled by Ligand and relating to or useful for developing sparsentan. We must use commercially reasonable efforts to develop andcommercialize sparsentan in specified major market countries and other countries in which we believe it is commercially reasonable to develop and commercialize such products.As consideration for the license, we are required to make payments upon the achievement of certain milestones, totaling up to $109.4 million. Should we commercialize sparsentanor any products containing any of the licensed compounds, we will be obligated to pay Ligand an escalating annual royalty between 15% and 17% of net sales of all such products.Through 2017, we made milestone payments to Ligand of $2.6 million under the license agreement.Under the terms of the license agreement, BMS has a right of first negotiation and Ligand has a right of second negotiation with respect to any license arrangement for a licensedcompound, except to the extent such rights may be waived.The license agreement will continue until neither party has any further payment obligations under the agreement and is expected to continue for approximately 10 to 20 years fromthe effective date. Ligand may terminate the license agreement due to (i) our insolvency, (ii) our material uncured breach of the agreement, (iii) our failure to use commerciallyreasonable efforts to develop and commercialize sparsentan as described above or (iv) certain other conditions. We may terminate the license agreement due to a material uncuredbreach of the agreement by Ligand.Thiola License AgreementIn 2014, we entered into a license agreement with Mission Pharmacal Company ("Mission"), pursuant to which we obtained an exclusive, royalty-bearing license to market, sell andcommercialize Thiola (Tiopronin) i n the United States and Canada, and a non-exclusive license to use know-how relating to Thiola to the extent necessary to market Thiola.45Table of ContentsWe paid Mission an up-front license fee of $3.0 million and will pay guaranteed minimum royalties during each calendar year the greater of $2.0 million or 20% of our net sales ofThiola. In November 2017, we amended the license agreement to extend the term through May of 2029. See Note 7 to Consolidated Financial Statements for further discussion.Other MattersStock Option AccountingSee Note 11 of Consolidated Financial Statements for discussion.Results of Operations for the Years Ended December 31, 2017, 2016 and 2015Net Product SalesThe following table provides information regarding net product sales (in thousands): Year Ended December 31, Year Ended December 31, 2017 2016 Change 2016 2015 ChangeThiola$82,311 $71,199 $11,112 $71,199 $54,923 $16,276Bile acid products72,626 62,392 10,234 62,392 44,969 17,423Total net product revenues$154,937 $133,591 $21,346 $133,591 $99,892 $33,699Net product sales for the years ended December 31, 2017, 2016 and 2015 were $154.9 million, $133.6 million and $99.9 million, respectively, and consisted of sales of Thiola,Chenodal and Cholbam ("Bile acid products"), less allowances for government and commercial rebates and patient assistance programs.The increase in net product sales for the year ended December 31, 2017 as compared to the same period in 2016, is due to increased patient count for all products.The increase in net product sales for the year ended December 31, 2016 as compared to the same period in 2015, is due to a full year of sales for Cholbam, and increased patientcounts for all products.We use a direct-to-patient distributor. Under this distribution model, we record revenues when customers take title of the product.Operating ExpensesThe following table provides information regarding operating expenses (in thousands): Year Ended December 31, Year Ended December 31, 2017 2016 Change 2016 2015 ChangeCost of goods sold$3,605 $4,554 $(949) $4,554 $2,185 $2,369Research and development78,168 70,822 7,346 70,822 50,426 20,396Selling, general and administrative101,333 91,941 9,392 91,941 79,541 12,400Change in fair value of contingent consideration19,389 18,383 1,006 18,383 13,778 4,605Restructuring3,608 893 2,715 893 — 893Legal fee settlement2,625 5,212 (2,587) 5,212 — 5,212Impairment of intangible assets— — — — 4,710 (4,710) $208,728 $191,805 $16,923 $191,805 $150,640 $41,1652017 versus 2016 resultsOperating expenses for the year ended December 31, 2017, were $208.7 million compared to $191.8 million for the year ended December 31, 2016, an increase of $16.9 million.The operating expenses increase is attributable to an increase in our research and development expenses of $7.3 million, an increase in selling, general and administrativeexpenses of $9.4 million, an increase in restructuring expense of $2.7 million, and a change in fair value of contingent consideration of $1.0 million, offset by lower legal settlementexpense of $2.6 million, and a decrease cost of goods sold of $0.9 million.Cost of goods sold decreased by $0.9 million due to higher prior year inventory reserves and prior year one time termination fee from a distribution partner, partially offset byincreased product sales.Research and development costs increased by $7.3 million due to increases in the preparation for and initiation of clinical trials for sparsentan and fosmetpantotenate, and non-clinical studies to support the clinical trials.Selling, general and administrative expenses increased by $9.4 million due to increases in professional fees of $3.3 million, selling and marketing expenses of $3.4 million, intangibleasset amortization of $1.3 million, and compensation expense of $2.0 million, offset by miscellaneous decreases of $0.6 million.46Table of ContentsThe following table provides the change in the fair value of contingent consideration of $1.0 million, which was due to changes in revenue forecasts, discount factors and timing ofpayments (in thousands): Year Ended December 31, 2017 2016 ChangeChenodal$13,446 $15,743 $(2,297)Cholbam11,643 4,940 6,703L-UDCA(5,700) (2,300) (3,400) $19,389 $18,383 $1,006Restructuring expense increased $2.7 million due to the consolidation of our research and development function to San Diego.Legal fee settlement expense of $2.6 million relates to amounts we advanced for legal fees to our former Chief Executive Officer in defense of litigation for his actions while holdingthat title. See Note 10 to the Consolidated Financial Statements for further discussion.2016 versus 2015 resultsOur operating expenses for the year ended December 31, 2016 were $191.8 million compared to $150.6 million for the year ended December 31, 2015, an increase of $41.2million. The operating expenses increase is attributable to an increase in our research and development expenses of $20.4 million, an increase in selling general and administrativeexpenses of $12.4 million, the accrual of legal settlement expense of $5.2 million, a change in valuation of contingent consideration of $4.6 million and increased cost of goods soldof $2.4 million, offset by lower impairment expenses of $4.7 million.The increase in research and development costs of $20.4 million is due to increases in clinical trials for fosmetpantotenate and sparsentan and non-clinical studies to support theclinical trials.The increase in selling, general and administrative expenses of $12.4 million is due to a full year of Cholbam intangible asset amortization, increased Thiola intangible assetamortization, increases for salary and benefits including stock compensation, and a full year of commercial support for Cholbam.Legal fee settlement expense of $5.2 million relates to amounts we advanced for legal fees to our former Chief Executive Officer in defense of litigation for his actions while holdingthat title. See Note 10 to the Consolidated Financial Statements for further discussion.The following table provides the change in the fair value of contingent consideration of $4.6 million, which was due to changes in revenue forecasts, discount factors and timing ofpayments (in thousands): Year Ended December 31, 2016 2015 ChangeChenodal $15,743 $9,115 $6,628Cholbam 4,940 4,663 277L-UDCA (2,300) — (2,300) $18,383 $13,778 $4,605Cost of goods sold increased by $2.4 million due to increased product sales, increased inventory reserves, and a one time termination fee from a distribution partner.Impairment of intangible assets decreased by $4.7 million resulting from the 2015 write off of the Carbetocin asset. We noted no indications for impairment on any of our intangibleassets in 2016.47Table of ContentsOther Income/ExpensesThe following table provides information regarding other income (expenses) (in thousands): Year Ended December 31, Year Ended December 31, 2017 2016 Change 2016 2015 ChangeLitigation settlement gain$— $— $— $— $15,500 $(15,500)Other income (expense), net1,107 (264) 1,371 (264) (296) 32Interest expense, net(1,188) (759) (429) (759) (7,748) 6,989Debt early payment penalty— — — — (2,250) 2,250Loss on extinguishment of debt— — — — (4,151) 4,151Finance expense— — — — (600) 600Change in fair value of derivative instruments(4,491) 1,655 (6,146) 1,655 (33,307) 34,962Gain on sale of assets— — — — 140,004 (140,004)Bargain purchase gain— — — — 49,063 (49,063) $(4,572) $632 $(5,204) $632 $156,215 $(155,583)Other expense for the year ended December 31, 2017 was $4.6 million compared to other income of $0.6 million for the year ended December 31, 2016, which represents anincrease of $5.2 million. The change was primarily attributable to the change in fair value of derivative instruments, driven by changes in our stock price.Other income for the year ended December 31, 2016 was $0.6 million compared to other income of $156.2 million for the year ended December 31, 2015, which represents avariance of $155.6 million. The change was primarily attributable to one-time events in 2015 such as the gain on the sale of a Pediatric PRV to Sanofi, the bargain purchase gain onthe Cholbam acquisition and the litigation settlement gain, offset by the change in fair value of derivative instruments, driven by changes in our stock price.Income Tax Benefit (Provision):We follow ASC 740, Income Taxes, which requires recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included inthe financial statements or tax returns. Under this method, deferred tax assets and liabilities are based on the differences between the financial statement and tax bases of assetsand liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. Deferred tax assets are reduced by a valuation allowance to the extentmanagement concludes it is more likely than not that the asset will not be realized.The standard addresses the determination of whether tax benefits claimed or expected to be claimed on a tax return should be recorded in the financial statements. Under ASC740, we may recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the tax authorities,based on the technical merits of the position. The tax benefits recognized in the financial statements from such a position should be measured based on the largest benefit that hasa greater than fifty percent likelihood of being realized upon ultimate settlement. ASC 740 also provides guidance on de-recognition, classification, interest and penalties on incometaxes, accounting in interim periods and requires increased disclosures. Our policy is to record estimated interest and penalty related to the underpayment of income taxes orunrecognized tax benefits as a component of its income tax provision.On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the "Tax Act"). Tax expense for fiscal2017 of $1.4 million increased from the fiscal 2016 tax benefit of $9.7 million primarily due to the impacts from the Tax Act including an increase in our valuation allowance due to theTax Act’s effect on the realizability of our deferred tax assets.Off-Balance Sheet ArrangementsWe do not have any off-balance sheet arrangements, except for operating leases.Liquidity and Capital ResourcesWe believe that our available cash and short-term investments as of the date of this filing will be sufficient to fund our anticipated level of operations in the near term. Managementbelieves that our operating results will vary from quarter to quarter and year to year depending upon various factors including revenues, general and administrative expenses, andresearch and development expenses.48Table of ContentsFor the years ended December 31, 2017 and 2016 we had the following financial performance (in thousands): December 31, 2017 December 31, 2016Revenue$154,937 $133,591Net loss(59,731) (47,903)Cash & cash equivalents99,394 41,002Short term investments201,236 214,871Accumulated deficit(177,655) (113,056)Stockholders' equity293,134 307,767Net working capital$240,139 $249,090Net working capital ratio3.80 3.99Asset sold to SanofiOn July 2, 2015, we sold and transferred a Pediatric PRV to Sanofi for $245.0 million. $150.0 million was received upon closing, and $47.5 million was due on each of the first andsecond anniversaries of the closing. In accordance with U.S. GAAP, we recorded the future short term and long term receivables at their present value of $46.2 million and $44.9million, respectively, at the date of the sale. The gain from the sale of the asset was approximately $140.0 million, net of $4.9 million in fees contractually due as part of the Cholbamacquisition. All payments have been received in accordance with the terms of the agreement.BorrowingsConvertible Notes Payable On May 29, 2014, we entered into a note purchase agreement relating to a private placement by us of $46.0 million aggregate principal senior convertible notes due 2019 (the“Notes”) which are convertible into shares of our common stock at an initial conversion price of $17.41 per share. The conversion price is subject to customary anti-dilutionprotection. The Notes bear interest at a rate of 4.5% per annum, payable semiannually in arrears on May 15 and November 15 of each year, beginning on November 15. TheNotes mature on May 30, 2019 unless earlier converted or repurchased in accordance with the terms. The aggregate carrying value of the Notes on their issuance was $43.0million, which was net of the $3.0 million debt discount.On June 30, 2014, we issued 401,047 shares of Common Stock to the holders of the Notes and such Noteholders granted us a release of certain claims they may have had inconnection with our sale of the Notes or certain statements made by us in connection with such sale due to our former Chief Executive Officer’s violation of his lockup agreement.We recorded the value of these shares on the date of issuance as finance expense. The amount was classified as other expense in our Consolidated Financial Statements for theyear ended December 31, 2014.As of December 31, 2017 all $46 million of principal pursuant to the Notes is outstanding.Credit FacilityIn June 2014, we entered into a $45 million Credit Agreement (the “Credit Facility”) which bore interest at an annual rate of (i) the Adjusted LIBOR Rate (as such term is defined inthe Credit Facility) plus 10.00% or (ii) in certain circumstances, the Base Rate (as such term is defined in the Credit Agreement) plus 9.00%. The Credit Facility contained certaincovenants, including those limiting us and our subsidiaries' abilities to incur indebtedness, incur liens, sell or acquire assets or businesses, change the nature of their businesses,engage in transactions with related parties, make certain investments or pay dividends. In addition, the Credit Facility required us and our subsidiaries to meet certain financialquarterly requirements.On January 12, 2015, we entered into Amendment No. 3 (“Amendment No. 3”) to the Credit Agreement in which we obtained a commitment letter from Athyrium CapitalManagement, LLC and Perceptive Credit Opportunities Fund, LP (collectively, the “Lenders”), our existing lenders, providing a commitment for a senior secured incremental termloan under our existing term loan facility in an aggregate principal amount of $30 million (the “Incremental Loan”), which could have been drawn down at our option to finance theacquisition of assets.As consideration for the commitment letter for the Incremental Loan, we made a cash payment to the Lenders and issued the Lenders warrants initially exercisable to purchase upto an aggregate of 125,000 shares of our common stock. We recorded a charge of $1.1 million in interest expense.On July 1, 2015, we paid $47.3 million as payment in full for all principal and accrued interest under the Credit Facility, which included $45.0 million of principal balance, $2.3 millionin prepayment premiums for early payment penalty, and an immaterial amount of interest accrued through the settlement date, as required by the terms of the Credit Agreement.Upon receipt of this final payment, the liens and security interests granted pursuant to the Credit Agreement and the documents executed and delivered pursuant thereto or inconnection therewith were automatically and irrevocably released and terminated.Interest ExpenseTotal interest expense, net, recognized for the years ended December 31, 2017, 2016 and 2015 was $1.2 million, $0.8 million and $7.7 million, respectively.Equity Offering49Table of ContentsIn March 2015, we completed a public offering of 7,866,000 shares of common stock at a price of $19.00 per share. We received net proceeds from the offering of $140.0 million,after deducting underwriting fees and other offering costs of $9.5 million.License Agreement ObligationsSee discussion above under the header "License Agreements".Funding RequirementsWe believe that our available cash and short-term investments as of the date of this filing will be sufficient to fund our anticipated level of operations for the near term. This belief isbased on many factors, however, some factors are beyond our control. Factors affecting our financing requirements include, but are not limited to:•revenue growth of our marketed products;•the rate of progress and cost of our clinical trials, preclinical studies and other discovery and research and development activities;•the timing of, and costs involved in, seeking and obtaining marketing approvals for our products, and in maintaining quality systems standards for our products;•our ability to manufacture sufficient quantities of our products to meet expected demand;•the costs of preparing, filing, prosecuting, maintaining and enforcing any patent claims and other intellectual property rights, litigation costs and the results of litigation;•our ability to enter into collaboration, licensing or distribution arrangements and the terms and timing of these arrangements;•the potential need to expand our business, resulting in additional payroll and other overhead expenses;•the potential acquisition or in-licensing of other products or technologies; and•the emergence of competing products or other adverse market developments.Future capital requirements will also depend on the extent to which we acquire or invest in additional complementary businesses, products and technologies.Cash FlowsThe following table summarizes our cash flows for the periods set forth below (in thousands): 2017 2016 2015Net cash provided by (used in) operating activities$7,403 $(3,441) $(1,389)Net cash provided by (used in) investing activities45,602 10,370 (80,602)Net cash provided by (used in) financing activities5,445 (3,849) 101,602Net increase in cash58,450 3,080 19,611Effect of exchange rate changes on cash(58) 117 (10)Cash & cash equivalents, beginning of period41,002 37,805 18,204Cash & cash equivalents, end of period$99,394 $41,002 $37,805Management considers marketable securities to be available to fund current operations, and they are classified as available for sale and included within current assets in ourConsolidated Balance Sheets. Therefore, cash and cash equivalents includes marketable securities and was considered to be $300.6 million as of December 31, 2017.Cash Flows from Operating ActivitiesOperating activities provided $7.4 million of cash during the year ended December 31, 2017 compared to $3.4 million of cash used for the year ended December 31, 2016. Afterexcluding non-cash adjustments, the variance is primarily due to increased product sales exceeding increased operating expenses.Operating activities used $3.4 million of cash during the year ended December 31, 2016 compared to $1.4 million of cash used for the year ended December 31, 2015. Afterexcluding one-time items and non-cash adjustments, the variance is primarily due to changes in operating assets offset by increased operating expenses exceeding increasedproduct sales.Cash Flows from Investing ActivitiesCash provided by investing activities for the year ended December 31, 2017 was $45.6 million compared to $10.4 million of cash provided for the year ended December 31, 2016.The variance of $35.2 million was primarily driven by the proceeds from the maturity of the note receivable being retained in cash in 2017 versus being used to purchase marketablesecurities in 2016.50Table of ContentsCash provided by investing activities for the year ended December 31, 2016 was $10.4 million compared to $80.6 million of cash used for the year ended December 31, 2015. Thevariance of $91.0 million was primarily driven by assets received from the sale of a pediatric PRV and a portion of the funds obtained from the 2015 equity offering being invested inmarketable securities in 2015. In 2016 we reinvested the proceeds from matured marketable securities as well as increased the total investments with the funds received from thenote receivable payment.Cash Flows from Financing ActivitiesFor the year ended December 31, 2017, cash provided by financing activities was $5.4 million compared to cash used of $3.8 million during the year ended December 31, 2016.The variance is primarily due to lower contingent consideration payments in the current year. In 2016 the Company paid an $8 million Cholbam sales related milestone achieved inthe third quarter. A $9 million Cholbam sales related milestone was accrued in the fourth quarter of 2017 but will not be paid until 2018.For the year ended December 31, 2016, cash used by financing activities was $3.8 million compared to cash provided of $101.6 million during the year ended December 31, 2015.The variance is due to the issuance of $140.0 million of common stock, net of fees, offset by the cash used to pay down debt of $45.0 million in 2015, with an increase in paymentsfor contingent consideration of $8.4 million. The remaining variance of $3.1 million was due to variances between years in cash provided by warrant and option exercises, offset bypayments of other liabilities.Contractual CommitmentsSee Note 10 to the Consolidated Financial Statements for discussion.Critical Accounting Policies and EstimatesSee Note 2 to the Consolidated Financial Statements for discussion.Recently Issued Accounting PronouncementsSee Note 2 to the Consolidated Financial Statements for discussion.ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISKOur primary exposure to market risk is related to changes in interest rates. As of December 31, 2017, we had cash equivalents and marketable securities of approximately $207.9million, consisting of money market funds, U.S. government agency debt, corporate debt and commercial paper. This exposure to market risk is interest rate sensitivity, which isaffected by changes in the general level of U.S. interest rates, particularly because our investments are in short-term marketable securities. Our marketable securities are subject tointerest rate risk and will fall in value if market interest rates increase. Due to the short-term duration of our investment portfolio and the low risk profile of our investments, a onepercent change in interest rates would have approximately a $1.7 million impact on our investments. We carry our investments based on publicly available information. We do notcurrently have any hard to value investment securities or securities for which a market is not readily available or active.ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATAThe Consolidated Financial Statements and supplementary data of Retrophin, Inc. required by this Item are described in Item 15 of this Annual Report on Form 10-K and arepresented beginning on page F-1.ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIALDISCLOSURENot applicable.ITEM 9A. CONTROLS AND PROCEDURESWe maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our Exchange Act reports is recorded, processed,summarized and reported within the timelines specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, includingour Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controlsand procedures, management recognized that any controls and procedures, no matter how well designed and operated, can only provide reasonable assurance of achieving thedesired control objectives, and in reaching a reasonable level of assurance, management necessarily was required to apply its judgment in evaluating the cost-benefit relationship ofpossible controls and procedures.As required by SEC Rule 13a-15(b), we carried out an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer andChief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures as of the end of the year covered by this report. Based on theforegoing, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective at the reasonable assurance level.51Table of ContentsManagement’s Report on Internal Control Over Financial ReportingInternal control over financial reporting refers to the process designed by, or under the supervision of, our Chief Executive Officer and Chief Financial Officer, and effected by ourboard of directors, management and other personnel, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements forexternal purposes in accordance with generally accepted accounting principles, and includes those policies and procedures that:(1) Pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and dispositions of our assets;(2) Provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accountingprinciples, and that our receipts and expenditures are being made only in accordance with authorization of our management and directors; and(3) Provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on thefinancial statements.Internal control over financial reporting cannot provide absolute assurance of achieving financial reporting objectives because of its inherent limitations. Internal control over financialreporting is a process that involves human diligence and compliance and is subject to lapses in judgment and breakdowns resulting from human failures. Internal control overfinancial reporting also can be circumvented by collusion or improper management override. Because of such limitations, there is a risk that material misstatements may not beprevented or detected on a timely basis by internal control over financial reporting. However, these inherent limitations are known features of the financial reporting process.Therefore, it is possible to design into the process safeguards to reduce, though not eliminate, this risk. Management is responsible for establishing and maintaining adequateinternal control over financial reporting for the company.Management has used the framework set forth in the report entitled Internal Control-Integrated Framework (2013 framework) published by the Committee of SponsoringOrganizations of the Treadway Commission, known as COSO, to evaluate the effectiveness of our internal control over financial reporting. Based on this assessment, our ChiefExecutive Officer and Chief Financial Officer concluded that our internal control over financial reporting was effective as of December 31, 2017. BDO USA, LLP, our independentregistered public accounting firm, has issued an attestation report on our internal control over financial reporting as of December 31, 2017, which is included herein.Changes In Internal Control Over Financial ReportingThere have not been any changes in our internal control over financial reporting during the quarter ended December 31, 2017 that have materially affected, or are reasonably likelyto materially affect, our internal control over financial reporting. 52Table of ContentsReport of Independent Registered Public Accounting FirmShareholders and Board of DirectorsRetrophin, Inc.San Diego, CaliforniaOpinion on Internal Control over Financial ReportingWe have audited Retrophin Inc. and its subsidiaries’ (the “Company’s”) internal control over financial reporting as of December 31, 2017, based on criteria established in InternalControl - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (the “COSO criteria”). In our opinion, the Companymaintained, in all material respects, effective internal control over financial reporting as of December 31, 2017, based on the COSO criteria.We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the consolidated balance sheets of theCompany and subsidiaries as of December 31, 2017 and 2016, the related Consolidated Statements of Operations and Comprehensive Income (Loss), Stockholders’ Equity(Deficit), and Cash Flows for each of the three years in the period ended December 31, 2017, and the related notes and our report dated February 27, 2018 expressed anunqualified opinion thereon.Basis for OpinionThe Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control overfinancial reporting, included in the accompanying Item 9A, Management’s Report on Controls and Procedures. Our responsibility is to express an opinion on the Company’s internalcontrol over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company inaccordance with U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.We conducted our audit of internal control over financial reporting in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit toobtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understandingof internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal controlbased on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides areasonable basis for our opinion.Definition and Limitations of Internal Control over Financial ReportingA company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation offinancial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policiesand procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company;(2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accountingprinciples, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) providereasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on thefinancial statements.Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to futureperiods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures maydeteriorate./s/BDO USA, LLPSan Diego, CaliforniaFebruary 27, 2018ITEM 9B. OTHER INFORMATIONNone.53Table of ContentsPART IIIItem 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCEInformation required by this item will be contained in our Definitive Proxy Statement for our 2018 Annual Meeting of Stockholders, to be filed pursuant to Regulation 14A with theSecurities and Exchange Commission within 120 days of December 31, 2017. Such information is incorporated herein by reference.Item 11. EXECUTIVE COMPENSATIONInformation required by this item will be contained in our Definitive Proxy Statement for our 2018 Annual Meeting of Stockholders, to be filed pursuant to Regulation 14A with theSecurities and Exchange Commission within 120 days of December 31, 2017. Such information is incorporated herein by reference.Item 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT ANDRELATED STOCKHOLDER MATTERSInformation required by this item will be contained in our Definitive Proxy Statement for our 2018 Annual Meeting of Stockholders, to be filed pursuant to Regulation 14A with theSecurities and Exchange Commission within 120 days of December 31, 2017. Such information is incorporated herein by reference.Item 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCEInformation required by this item will be contained in our Definitive Proxy Statement for our 2018 Annual Meeting of Stockholders, to be filed pursuant to Regulation 14A with theSecurities and Exchange Commission within 120 days of December 31, 2017. Such information is incorporated herein by reference.Item 14. PRINCIPAL ACCOUNTING FEES AND SERVICESInformation required by this item will be contained in our Definitive Proxy Statement for our 2018 Annual Meeting of Stockholders, to be filed pursuant to Regulation 14A with theSecurities and Exchange Commission within 120 days of December 31, 2017. Such information is incorporated herein by reference.54Table of ContentsPART IVITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES(a) The financial statements at page F-1 are incorporated by reference to a part of this Annual Report on Form 10-K. Financial statement schedules are omitted because they are not applicable or the required information is shown in the financial statements or notes thereto.(b) Exhibits: The exhibits to this report are listed in the exhibit index below.Exhibit No. Description 2.1 Asset Purchase Agreement, dated May 22, 2015, by and between Retrophin, Inc. and Sanofi (incorporated by reference to Exhibit 2.1 to the Company's Current report on Form 8-Kfiled with the SEC on May 27, 2015).3.1 Certificate of Incorporation of the Company (incorporated by reference to Exhibit 3.1 to Amendment No. 2 to the Company’s General Form for Registration of Securities on Form 10-12G, filed with the SEC on October 28, 2010).3.2 Certificate of Amendment of Certificate of Incorporation of the Company (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K, filed with the SECon June 11, 2015).3.3 Amended and Restated Bylaws of the Company (incorporated by reference to Exhibit 3.2 to the Company’s Current Report on Form 8-K, filed with the SEC on June 11, 2015).4.1 Form of Warrant Certificate, dated June 30, 2014, issued to the Lenders under the Credit Agreement (incorporated by reference to Exhibit 4.1 to the Company’s Current Report onForm 8-K, filed with the SEC on July 7, 2014).4.2 Form of Warrant issued to the purchasers in the private placement of 3,045,929 shares of common stock, dated February 14, 2013 (incorporated by reference to Exhibit 4.1 to theCompany’s Current Report on Form 8-K, filed with the SEC on February 19, 2013).4.3 Form of Common Stock Purchase Warrant, dated August 15, 2013, issued to the purchasers of securities in the private placement of the Company closed on August 15, 2013(incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K, filed with the SEC on August 20, 2013).4.4 Form of Note Purchase Agreement for principal senior convertible notes with an interest rate of 4.50% due 2019 (“2019 Notes”), dated May 29, 2014, by and among the Companyand the investors identified therein (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K, filed with the SEC on June 4, 2014).4.5 Form of Indenture for 2019 Notes, dated May 30, 2014 (incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K, filed with the SEC on June 4,2014).4.6 Form of Note for 2019 Notes, dated May 30, 2014 (incorporated by reference to Exhibit 10.3 to the Company’s Current Report on Form 8-K, filed with the SEC on May 29, 2014).10.1 Trademark License and Supply Agreement, dated May 29, 2014, by and between Retrophin, Inc. and Mission Pharmacal Company (incorporated by reference to Exhibit 10.1 to theCompany’s Current Report on Form 8-K, filed with the SEC on June 4, 2014).10.2 First Amendment to Trademark License and Supply Agreement, effective as of July 28, 2014, by and between Mission Pharmacal Company and Retrophin, Inc. (incorporated byreference to Exhibit 10.1 to the Company’s Current Report on Form 8-K, filed with the SEC on July 29, 2014).10.3 International Rights Purchase Agreement, dated as of March 26, 2014, by and between Manchester Pharmaceuticals LLC and Retrophin Therapeutics International, LLC(incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K, filed with the SEC on March 31, 2014).10.4+ Sublicense Agreement, dated February 16, 2012, by and among Ligand Pharmaceuticals Incorporated, a Delaware corporation, Pharmacopeia, Inc., a Delaware limited liabilitycompany, and Retrophin, LLC, a Delaware limited liability company (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K, filed with the SEC onDecember 19, 2012).10.5† Employment Agreement, dated March 2, 2015, by and between Retrophin, Inc. and Laura M. Clague (incorporated by reference to Exhibit 10.25 to the Company’s Annual Report onForm 10-K, filed with the SEC on March 11, 2015).10.6† Employment Agreement, dated March 2, 2015, by and between Retrophin, Inc. and Stephen Aselage (incorporated by reference to Exhibit 10.27 to the Company’s Annual Report onForm 10-K, filed with the SEC on March 11, 2015).10.7 Summary Separation Proposal, dated October 13, 2014, by and between Retrophin, Inc. and Martin Shkreli (incorporated by reference to Exhibit 10.28 to the Company’s AnnualReport on Form 10-K, filed with the SEC on March 11, 2015).10.8 Retrophin, Inc. 2014 Incentive Compensation Plan as amended (incorporated by reference to Exhibit 99.1 to the Company’s Current Report on Form 8-K, filed with the SEC onFebruary 9, 2015).10.9+ Amendment No. 4 to Sublicense Agreement dated as of September 17, 2015, between Retrophin, Inc. and Ligand Pharmaceuticals Incorporated (incorporated by reference to Exhibit10.1 to the Company’s Quarterly Report on Form 10-Q/A, filed with the SEC on December 22, 2015).10.10 Addendum to Trademark License and Supply Agreement, dated October 19, 2015, by and between to Company and Mission Pharmacal (incorporated by reference to Exhibit 10.2 tothe Company’s Quarterly Report on Form 10-Q, filed with the SEC on November 6, 2015).10.11 Asset Purchase Agreement dated as of January 9, 2015, between Retrophin, Inc. and Turing Pharmaceuticals AG (incorporated by reference to Exhibit 10.1 to the Company’sQuarterly Report on Form 10-Q, filed with the SEC on May 11, 2015).55Table of Contents10.12 Asset Purchase Agreement dated as of February 12, 2015, among Retrophin, Inc., Manchester Pharmaceuticals LLC and Turing Pharmaceuticals AG (incorporated by reference toExhibit 10.2 to the Company’s Quarterly Report on Form 10-Q, filed with the SEC on May 11, 2015).10.13 Asset Purchase Agreement dated as of February 12, 2015, between Retrophin, Inc. and Turing Pharmaceuticals AG (incorporated by reference to Exhibit 10.3 to the Company’sQuarterly Report on Form 10-Q, filed with the SEC on May 11, 2015).10.14 Amendment No. 3 to Credit Agreement dated January 12, 2015, among Retrophin, Inc., the lenders from time to time thereto and U.S. Bank National Association, as administrativeagent and collateral agent (incorporated by reference to Exhibit 10.4 to the Company’s Quarterly Report on Form 10-Q, filed with the SEC on May 11, 2015).10.15+ Amendment No. 3 to Sublicense Agreement dated as of February 27, 2015, between Retrophin, Inc. and Ligand Pharmaceuticals Incorporated (incorporated by reference to Exhibit10.5 to the Company’s Quarterly Report on Form 10-Q, filed with the SEC on May 11, 2015).10.16+ Asset Purchase Agreement dated January 10, 2015 by and between Retrophin, Inc. and Asklepion Pharmaceuticals, LLC (incorporated by reference to Exhibit 10.6 to theCompany’s Quarterly Report on Form 10-Q, filed with the SEC on May 11, 2015).10.17 Purchase Agreement dated as of February 12, 2015 among Retrophin Inc., Manchester Pharmaceuticals LLC and Waldun Pharmaceuticals LLC (incorporated by reference to Exhibit10.9 to the Company’s Quarterly Report on Form 10-Q, filed with the SEC on May 11, 2015).10.18† Employment Agreement, dated August 15, 2016, by and between Retrophin, Inc. and Neil McFarlane (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Reporton Form 10-Q, filed with the SEC on November 4, 2016).10.19+ Amendment One to the Third Amendment to Trademark License and Supply Agreement, dated September 12, 2016, by and between the Company and Mission PharmacalCompany (incorporated by reference to Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q, filed with the SEC on November 4, 2016).10.20+ Amendment Two to the Third Amendment to Trademark License and Supply Agreement, dated November 3, 2017, by and between the Company and Mission Pharmacal Company.10.21+ Third Amendment to Trademark License and Supply Agreement dated as of March 17, 2016, between Retrophin Inc. and Mission Pharmacal. (incorporated by reference to Exhibit10.2 to the Company’s Quarterly Report on Form 10-Q, filed with the SEC on May 5, 2016).10.22+ Asset Purchase Agreement dated as of June 9, 2016 between Retrophin, Inc. and Asklepion Pharmaceuticals, LLC (incorporated by reference to Exhibit 10.1 to the Company’sQuarterly Report on Form 10-Q, filed with the SEC on August 4, 2016).10.23 Retrophin, Inc. 2015 Equity Incentive Plan, as amended (incorporated by reference to Exhibit 99.1 to the Company's current report on Form 8-K, filed with the SEC on May 18,2017).10.24† Amendment to Employment Agreement, entered into as of April 11, 2017 and modifies the Employment Agreement dated March 2, 2015, by and between Retrophin, Inc. andStephen Aselage (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q, filed with the SEC on May 5, 2017).10.25† Amendment to Employment Agreement, entered into as of April 11, 2017 and modifies the Employment Agreement dated March 2, 2015, by and between Retrophin, Inc. and LauraM. Clague (incorporated by reference to Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q, filed with the SEC on May 5, 2017).10.26† Amendment to Employment Agreement, entered into as of April 11, 2017 and modifies the Employment Agreementdated August 15, 2016, by and between Retrophin, Inc. and Neil McFarlane (incorporated by reference to Exhibit 10.3 to the Company’s Quarterly Report on Form 10-Q, filed withthe SEC on May 5, 2017).10.27† Retrophin, Inc. 2017 Employee Stock Purchase Plan (incorporated by reference to Exhibit 99.2 to the Company's current report on Form 8-K, filed with the SEC on May 18, 2017)10.28 Form of Stock Option Grant Notice, Option Agreement and Notice of Exercise for Inducement Grant Outside of 2015 Equity Incentive Plan (incorporated by reference to Exhibit99.3 to the Company's current report on Form S-8, filed with the SEC on June 8, 2017).10.29 Form of Restricted Stock Unit Grant Notice and Restricted Stock Unit Award Agreement for Inducement Grant Outside of 2015 Equity Incentive Plan(incorporated by reference toExhibit 99.4 to the Company's current report on Form S-8, filed with the SEC on June 8, 2017).21.1 List of subsidiaries of the Company.23.1 Consent of BDO USA, LLP.24.1 Power of Attorney (see signature page hereto).31.1 Chief Executive Officer's Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.31.2 Chief Financial Officer's Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.32.1 Chief Executive Officer’s Certification pursuant to Section 906 of Sarbanes Oxley Act of 2002.32.2 Chief Financial Officer’s Certification pursuant to Section 906 of Sarbanes Oxley Act of 2002.101.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 Label Linkbase Document.101.PRE Taxonomy Extension Presentation Linkbase Document.+ We have received confidential treatment of certain portions of this agreement, which have been omitted and filed separately with the SEC pursuant to Rule 406 under the Securities Act of1933, as amended, or Rule 24b-2 of the Securities Exchange Act of 1934, as amended.† Indicates management contract or compensatory plan.56Table of ContentsITEM 16. FORM 10-K SUMMARYNone.57Table of ContentsSIGNATURESPursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned,thereunto duly authorized.Date: February 27, 2018RETROPHIN, INC. By:/s/ Stephen Aselage Name: Stephen Aselage Title: Chief Executive Officer By:/s/ Laura Clague Name: Laura Clague Title: Chief Financial OfficerPOWER OF ATTORNEYKnow all persons by these presents, that each person whose signature appears below constitutes and appoints Stephen Aselage and Laura Clague, and each of them, as hisattorneys-in-fact and agents, each with power of substitution in any and all capacities, to sign any amendments to this annual report on Form 10-K, and to file the same with exhibitsthereto, and other documents in connection therewith, with the Securities and Exchange Commission, hereby ratifying and confirming all that the attorney-in-fact or his substitute orsubstitutes may do or cause to be done by virtue hereof.Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacitiesand on the dates indicated:Signature Title Date /s/ Stephen Aselage Chief Executive Officer and Director (Principal Executive Officer) February 27, 2018Stephen Aselage /s/ Laura Clague Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer) February 27, 2018Laura Clague /s/ Roy D. Baynes Director Roy D. Baynes February 27, 2018 /s/ Timothy Coughlin Director Timothy Coughlin February 27, 2018 /s/ John Kozarich Director John Kozarich February 27, 2018 /s/ Gary Lyons Director Gary Lyons February 27, 2018 /s/ Jeffrey A. Meckler Director Jeffrey A. Meckler February 27, 2018 /s/ John A. Orwin Director John A. Orwin February 27, 2018 /s/ Ron Squarer Director Ron Squarer February 27, 201858Table of ContentsRETROPHIN, INC. AND SUBSIDIARIESINDEX TO FINANCIAL STATEMENTS PageReport of Independent Registered Public Accounting FirmF-2Financial Statements Consolidated Balance Sheets at December 31, 2017 and 2016F-3Consolidated Statements of Operations and Comprehensive Income (Loss) for the years ended December 31, 2017, 2016 and 2015F-4Consolidated Statements of Stockholders' Equity (Deficit) for the years ended December 31, 2017, 2016 and 2015F-5Consolidated Statements of Cash Flows for the years ended December 31, 2017, 2016 and 2015F-6Notes to Consolidated Financial StatementsF-8F-1Table of ContentsReport of Independent Registered Public Accounting FirmShareholders and Board of DirectorsRetrophin, Inc.San Diego, CaliforniaOpinion on the Consolidated Financial StatementsWe have audited the accompanying consolidated balance sheets of Retrophin, Inc. (the “Company”) and subsidiaries as of December 31, 2017 and 2016, the related ConsolidatedStatements of Operations and Comprehensive Income (Loss), Stockholders’ Equity (Deficit), and Cash Flows for each of the three years in the period ended December 31, 2017,and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects,the financial position of the Company and subsidiaries at December 31, 2017 and 2016, and the results of their operations and their cash flows for each of the three years in theperiod ended December 31, 2017, in conformity with accounting principles generally accepted in the United States of America.We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the Company's internal control overfinancial reporting as of December 31, 2017, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizationsof the Treadway Commission (“COSO”) and our report dated February 27, 2018 expressed an unqualified opinion thereon.Basis for OpinionThese consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s consolidated financialstatements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required tobe independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and ExchangeCommission and the PCAOB.We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance aboutwhether the consolidated financial statements are free of material misstatement, whether due to error or fraud.Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performingprocedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financialstatements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of theconsolidated financial statements. We believe that our audits provide a reasonable basis for our opinion./s/ BDO USA, LLPWe have served as the Company's auditor since 2014.San Diego, CaliforniaFebruary 27, 2018F-2Table of ContentsRETROPHIN, INC. AND SUBSIDIARIESCONSOLIDATED BALANCE SHEETS(In thousands, except share and per share amounts) December 31, 2017 December 31, 2016Assets Current assets: Cash and cash equivalents$99,394 $41,002Marketable securities201,236 214,871Accounts receivable, net13,872 18,510Inventory, net5,351 2,826Prepaid expenses and other current assets3,112 4,831Prepaid taxes2,842 3,463Note receivable, current— 46,849Total current assets325,807 332,352Property and equipment, net3,230 2,587Other assets5,556 7,364Intangible assets, net184,817 182,043Goodwill936 936Total assets$520,346 $525,282Liabilities and Stockholders' Equity Current liabilities: Accounts payable$18,938 $7,522Accrued expenses36,018 33,308Guaranteed minimum royalty, short term2,000 2,000Other current liabilities3,902 1,842Business combination-related contingent consideration9,100 16,150Derivative financial instruments, warrants15,710 22,440Total current liabilities85,668 83,262Convertible debt45,077 44,422Other noncurrent liabilities2,472 4,010Guaranteed minimum royalty, long term13,095 8,068Business combination-related contingent consideration, less current portion80,900 71,328Deferred income tax liability, net— 6,425Total liabilities227,212 217,515Stockholders' Equity: Preferred stock $0.001 par value; 20,000,000 shares authorized; 0 issued and outstanding as of December 31, 2017 and 2016,respectively— —Common stock $0.0001 par value; 100,000,000 shares authorized; 39,373,745 and 37,906,669 issued and outstanding as of December31, 2017 and 2016, respectively4 4Additional paid-in capital471,800 421,309Accumulated deficit(177,655) (113,056)Accumulated other comprehensive loss(1,015) (490)Total stockholders' equity293,134 307,767Total liabilities and stockholders' equity$520,346 $525,282The accompanying notes are an integral part of these consolidated financial statements.F-3Table of ContentsRETROPHIN, INC. AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)(In thousands, except share and per share amounts) Years Ended December 31, 2017 2016 2015Net product sales$154,937 $133,591 $99,892Operating expenses: Cost of goods sold3,605 4,554 2,185Research and development78,168 70,822 50,426Selling, general and administrative101,333 91,941 79,541Change in fair value of contingent consideration19,389 18,383 13,778Restructuring3,608 893 —Legal fee settlement2,625 5,212 —Impairment of intangible assets— — 4,710Total operating expenses208,728 191,805 150,640Operating loss(53,791) (58,214) (50,748)Other Income (expense), net: Litigation settlement gain— — 15,500Other income (expense), net1,107 (264) (296)Interest expense, net(1,188) (759) (7,748)Debt early payment penalty— — (2,250)Loss on extinguishment of debt— — (4,151)Finance expense— — (600)Change in fair value of derivative instruments(4,491) 1,655 (33,307)Gain on sale of assets— — 140,004Bargain purchase gain— — 49,063Total other income (expense), net(4,572) 632 156,215Income (loss) before benefit (provision) for income taxes(58,363) (57,582) 105,467Income tax benefit (provision)(1,368) 9,679 11,770Net income (loss)$(59,731) $(47,903) $117,237Net income (loss) per common share: Basic$(1.54) $(1.29) $3.49Diluted$(1.54) $(1.29) $3.17Weighted average common shares outstanding: Basic38,769,816 36,997,865 33,560,249Diluted38,769,816 38,288,012 37,581,439 Comprehensive income (loss): Net income (loss)$(59,731) $(47,903) $117,237Foreign currency translation gain (loss)(339) 93 (40)Unrealized gain (loss) on sale of marketable securities(186) 99 (4,927)Comprehensive income (loss)$(60,256) $(47,711) $112,270The accompanying notes are an integral part of these consolidated financial statements.F-4Table of ContentsRETROPHIN, INC. AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT)(In thousands, except share amounts) Common Stock Common Stock in Treasury AdditionalPaid inCapital AccumulatedOtherComprehensiveIncome (Loss) AccumulatedDeficit TotalStockholders'Equity(Deficit) Shares Amount Shares Amount BALANCE - DECEMBER 31, 201426,428,071 $3 (379,591) $(3,215) $140,851 $4,285 $(179,175) $(37,251)Share based compensation— — — — 25,900 — — 25,900Vesting of stock for accrued severance— — — — 2,126 — — 2,126Issuance of common stock in connection with March2015 public offering at $19.00 per share, net of fees of$9 million7,866,000 1 — — 139,986 — — 139,987Exercise of warrants and reclassification of derivativeliability870,306 — — — 28,012 — — 28,012Retirement of treasury stock(379,591) — 379,591 3,215 — — (3,215) —Unrealized gain/(loss) on marketable securities— — — — — (4,927) — (4,927)Foreign currency translation adjustments— — — — — (40) — (40)Option inducement liability reversal and adjustments— — — — 3,840 — — 3,840Issuance of common shares under the equity incentiveplan1,019,788 — — — 6,818 — — 6,818Shares issued in connection with Cholbam acquisition661,279 — — — 15,844 — — 15,844Excess tax benefits of stock option exercises— — — — 2,425 — — 2,425Net income— — — — — — 117,237 117,237BALANCE - DECEMBER 31, 201536,465,853 $4 — $— $365,802 $(682) $(65,153) $299,971Share based compensation— — — — 29,102 — — 29,102Legal fee settlement-short swing profit recovery— — — — 2,025 — — 2,025Exercise of warrants and reclassification of derivativeliability898,633 — — — 20,720 — — 20,720Unrealized gain/(loss) on marketable securities— — — — — 99 — 99Foreign currency translation adjustments— — — — 3 93 — 96Issuance of common shares under the equity incentiveplan542,183 — — — 4,016 — — 4,016Tax shortfall from stock option exercises— — — — (359) — — (359)Net loss— — — — — — (47,903) (47,903)BALANCE - DECEMBER 31, 201637,906,669 $4 — $— $421,309 $(490) $(113,056) $307,767Adoption of ASU 2016-16 required de-recognitionof intra-company deferred tax assets— — — — — — (4,868) (4,868)Share based compensation— — — — 26,645 — — 26,645Exercise of warrants and reclassification ofderivative liability607,481 — — — 14,866 — — 14,866Unrealized gain/(loss) on marketable securities— — — — — (186) — (186)Foreign currency translation adjustments— — — — (339) — (339)Issuance of common shares under the equityincentive plan and proceeds from exercise.819,573 — — — 8,087 — — 8,087ESPP stock purchase and expense40,022 — — — 893 — — 893Net loss— — — — — — (59,731) (59,731)BALANCE - DECEMBER 31, 201739,373,745 $4 — $— $471,800 $(1,015) $(177,655) $293,134The accompanying notes are an integral part of these consolidated financial statementsF-5Table of ContentsRETROPHIN, INC. AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF CASH FLOWS(In thousands) For the year ended December 31, 2017 2016 2015Cash Flows from Operating Activities: Net income (loss)$(59,731) $(47,903) $117,237Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Depreciation and amortization17,804 16,135 13,392Gain upon divestiture of Pediatric Priority Review Voucher— — (140,004)Gain upon divestiture of assets to Turing Pharmaceuticals— — (914)Deferred income tax(6,425) (22,661) (15,573)Settlement expense2,625 5,212 —Loss on extinguishment of debt— — 4,151Impairment of intangible assets— — 4,710Derivative financial instruments, warrants, issued, recorded in interest expense— — 1,050Accretion on notes receivable(651) (1,927) (1,267)Accretion on contingent consideration1,723 1,976 2,461Amortization of debt discount and deferred financing costs656 656 1,340Amortization of premiums on investments1,338 1,097 398Share based compensation26,874 29,102 25,900Legal accrual reversal— (2,967) —Bargain purchase gain— — (49,063)Change in estimated fair value of contingent consideration19,389 18,383 13,778Payments from change in fair value of contingent consideration(3,949) (4,416) (1,325)Change in estimated fair value of liability classified warrants4,491 (1,655) 33,307Foreign currency transaction gain(1,081) — —Other operating activities526 54 405Changes in operating assets and liabilities, net of business acquisitions: Accounts receivable4,945 (6,090) (4,504)Inventory(1,706) (306) (1,174)Prepaid expenses and other current assets(2,702) (2,447) (966)Prepaid income taxes621 4,644 (8,107)Accounts payable and accrued expenses2,656 9,672 3,379Net cash provided by (used in) operating activities7,403 (3,441) (1,389)Cash Flows from Investing Activities: Purchase of fixed assets(887) (1,428) (22)Purchase of intangible assets(13,122) (10,496) (7,008)Security deposits— (115) —Proceeds from the sale/maturity of marketable securities114,526 159,520 9,977Purchase of marketable securities(102,415) (184,111) (198,530)Proceeds from the maturity of notes receivable47,500 47,500 —Cash received upon sale of assets, net— — 148,411Cash paid upon acquisition, net of cash acquired— (500) (33,430)Net cash provided by (used in) investing activities45,602 10,370 (80,602)Cash Flows from Financing Activities: Payment of acquisition-related contingent consideration(4,099) (10,511) (3,103)Payment of other liability(852) (1,000) (2,000)Payment of guaranteed minimum royalty(2,000) (2,000) (2,000)Proceeds from exercise of warrants3,645 6,005 4,475Proceeds from exercise of stock options8,087 4,016 6,818Excess tax benefit (shortfall) related to stock compensation— (359) 2,425Proceeds received from issuance of common stock— — 149,487Financing costs from issuance of common stock— — (9,500)Repayment of credit facility— — (45,000)Other financing activities664 — —Net cash provided by (used in) financing activities5,445 (3,849) 101,602Effect of exchange rate changes on cash(58) 117 (10)Net increase in cash and cash equivalents58,392 3,197 19,601Cash and cash equivalents, beginning of year41,002 37,805 18,204Cash and cash equivalents, end of year$99,394 $41,002 $37,805Supplemental Disclosure of Cash Flow Information: F-6Table of ContentsCash paid for interest$2,070 $2,070 $5,838Cash paid for income taxes$7,172 $7,933 $9,610Non-cash Investing and financing activities: Short swing profit judgment offset with settlement expense accrual$— $2,025 $—Reclassification of derivative liability to equity due to exercise of warrants$11,221 $14,715 $25,537Accrued royalty in excess of minimum payable to the sellers of Thiola$13,247 $11,206 $8,219Accrual of fee to extend term of current Thiola agreement$5,885 $— $—Present value of contingent consideration payable upon acquisition related to L-UDCA$— $25,000 $—Present value of contingent consideration payable upon acquisition relate to Cholbam$— $— $42,010Shares issued in connection with Cholbam acquisition$— $— $15,844The accompanying notes are an integral part of these consolidated financial statements.F-7Table of ContentsRETROPHIN, INC. AND SUBSIDIARIESNOTES TO CONSOLIDATED FINANCIAL STATEMENTSNOTE 1. DESCRIPTION OF BUSINESSOrganization and Description of BusinessRetrophin, Inc. (“we”, “our”, “us”, “Retrophin” and the “Company”) refers to Retrophin, Inc., a Delaware corporation, as well as our direct and indirect subsidiaries. Retrophin is afully integrated biopharmaceutical company headquartered in San Diego, California focused on the development, acquisition and commercialization of therapies for the treatment ofrare diseases. We regularly evaluate and, where appropriate, act on opportunities to expand our product pipeline through licenses and acquisitions of products in areas that willserve patients with rare diseases and that we believe offer attractive growth characteristics.The Company is developing the following pipeline products:The Company is developing fosmetpantotenate (RE-024), a novel small molecule, as a potential treatment for PKAN. PKAN is a genetic neurodegenerative disorder that is typicallydiagnosed in the first decade of life. Consequences of PKAN include dystonia, dysarthria, rigidity, retinal degeneration, and severe digestive problems. There are currently no viabletreatment options for patients with PKAN. Fosmetpantotenate is a phosphopantothenate replacement therapy that aims to restore levels of this key substrate in PKAN patients.Sparsentan (RE-021) is an investigational product candidate which acts as both a potent ARB, as well as a selective ERA, with in vitro selectivity toward endothelin receptor type A.The Company secured a license to sparsentan from Ligand Pharmaceuticals, Inc. and Bristol-Myers Squibb Company (who referred to it as DARA). The Company is developingsparsentan as a treatment for FSGS, which is a leading cause of end-stage renal disease and nephrotic syndrome (“NS”). There are no U.S. Food and Drug Administration (the"FDA") approved treatments for FSGS and off-label resources are limited to ACE/ARBs, steroids, and immunosuppressant agents, which are effective in only a subset of patients.The Company recently announced the exploration of a second indication, IgAN, for sparsentan. IgAN is characterized by hematuria, proteinuria, and variable rates of progressiverenal failure. There is no FDA approved treatment for IgAN.The Company is a party to a joint development agreement with Censa Pharmaceuticals Inc., a privately held biotechnology company focused on developing therapies for orphanmetabolic diseases, to evaluate sepiapterin ("CNSA-001") for the treatment of phenylketonuria (PKU). CNSA-001 is an orally bioavailable form of a natural precursor oftetrahydrobiopterin (BH4) with the potential to provide improved phenylalanine (Phe) reduction in patients with PKU when compared to BH4.PKU is a rare, genetic metabolic condition in which the body cannot breakdown Phe due to a missing or defective phenylalanine hydroxylase (PAH) enzyme. High Phe levels canlead to developmental and physical growth delay, executive function impairment, seizures, and microcephaly caused by toxic Phe accumulation in the brain.In September 2017, the Company entered a three-way Cooperative Research and Development Agreement ("CRADA") with the National Institutes of Health’s National Center forAdvancing Translational Sciences (NCATS) and patient advocacy foundation NGLY1.org to collaborate on research efforts aimed at the identification of potential small moleculetherapeutics for NGLY1 deficiency.N-glycanase deficiency, or NGLY1 deficiency, is an extremely rare genetic disorder believed to be caused by a deficiency in an enzyme called N-glycanase-1, which is encoded bythe gene NGLY1. The condition has been characterized by symptoms such as developmental delays, seizures, complex hyperkinetic movement disorders, diminished reflexes andan inability to produce tears. There are no approved therapeutic options for NGLY1 deficiency, and current therapeutic strategies are limited to symptom management.Liquid ursodeoxycholic acid ("L-UDCA") is a liquid formulation of ursodeoxycholic acid being developed for the treatment of a rare liver disease called primary biliary cholangitis("PBC"). The Company obtained the rights to L-UDCA during 2016 with the intention of making L-UDCA commercially available to the subset of PBC patients who have difficultyswallowing.The Company sells the following three products:•Chenodal (chenodiol tablets) is approved in the United States for the treatment of patients suffering from gallstones in whom surgery poses an unacceptable health riskdue to disease or advanced age. Chenodal has been the standard of care for cerebrotendinous xanthomatosis ("CTX") patients for more than three decades and theCompany is currently pursuing adding this indication to the label.•Cholbam (cholic acid capsules) is approved in the United States for the treatment of bile acid synthesis disorders due to single enzyme defects and is further indicated foradjunctive treatment of patients with peroxisomal disorders.•Thiola (tiopronin tablets) is approved in the United States for the prevention of cystine (kidney) stone formation in patients with severe homozygous cystinuria.F-8Table of ContentsNOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIESA summary of the significant accounting policies applied in the preparation of the accompanying consolidated financial statements follows:Principles of ConsolidationThe consolidated financial statements represent the consolidation of the accounts of the Company and its subsidiaries in conformity with accounting principles generally accepted inthe United States ("U.S. GAAP"). All intercompany accounts and transactions have been eliminated in consolidation.Use of EstimatesIn preparing financial statements in conformity with U.S. GAAP, management is required to make estimates and assumptions that affect the reported amounts of assets andliabilities and disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported amounts of expenses during the reporting period. Due toinherent uncertainty involved in making estimates, actual results reported in future periods may be affected by changes in these estimates. On an ongoing basis, the Companyevaluates its estimates and assumptions. These estimates and assumptions include revenue recognition, valuing equity securities in share-based payments, estimating expenses ofcontracted research organizations, estimating fair value of equity instruments recorded as derivative liabilities, estimating the fair value of net assets acquired in businesscombinations, estimating the useful lives of depreciable and amortizable assets, goodwill impairment, estimating the fair value of contingent consideration, estimating of valuationallowances and uncertain tax positions, and estimates associated with the assessment of impairment for long lived assets.Revenue RecognitionProduct sales for the year ended December 31, 2017 and 2016 consisted of sales of Chenodal, Cholbam and Thiola. Product sales for the year ended December 31, 2015consisted of sales of Chenodal, Thiola and Vecamyl (divested in 2015). Revenue from product sales is recognized when persuasive evidence of an arrangement exists, title toproduct and associated risk of loss have passed to the customer, the price is fixed or determinable, collection from the customer is reasonably assured, the Company has no furtherperformance obligations, and returns can be reasonably estimated. The Company sells in the United States and Canada through a direct-to-patient distributor. Under thisdistribution model, the Company records revenues when customers take title of the product.The Company sells Kolbam internationally, and these revenues are immaterial when taken in consideration of the financial statements as a whole.Revenue from product sales is recorded net of applicable provisions for rebates under government (including medicaid) programs, commercial rebates, prompt pay discounts, andother sales-related deductions. We review our estimates of rebates and other applicable provisions each period and record any necessary adjustments in the current period.Deductions from RevenueGovernment Rebates: The Company estimates the rebates that we will be obligated to provide to government programs and deducts these estimated amounts from our grossproduct sales at the time the revenues are recognized. Allowances for government rebates and discounts are established based on actual payer information, which is reasonablyestimated at the time of delivery, and the government-mandated discounts applicable to government-funded programs. Rebate discounts are included in other current liabilities inthe accompanying consolidated balance sheets.Commercial Rebates: The Company estimates the rebates that we incur due to contracts with certain commercial payors and deducts these estimated amounts from our grossproduct sales at the time the revenues are recognized. Allowances for commercial rebates are established based on actual payer information, which is reasonably estimated at thetime of delivery. Rebate discounts are included in other current liabilities in the accompanying consolidated balance sheets.Prompt Pay Discounts: The Company offers discounts to certain customers for prompt payments. The Company accrues for the estimated prompt pay discount based on thegross amount of each invoice for those customers at the time of sale.Product Returns: Consistent with industry practice, the Company offers its customers a limited right to return product purchased directly from the Company, which is principallybased upon the product’s expiration date. Generally, shipments are only made upon a patient prescription thus returns are minimal.Research and Development CostsResearch and development includes expenses related to sparsentan, fosmetpantotenate and our other pipeline programs. We expense all research and development costs as theyare incurred. Our research and development costs are comprised of salaries and bonuses, benefits, non-cash share based compensation, license fees, milestones under licenseagreements, costs paid to third-party contractors to perform research, conduct clinical trials, and develop drug materials and delivery devices, and associated overhead expensesand facilities costs. Reimbursed research and development costs under collaborative arrangements are recorded as a reduction to research and development costs. We chargedirect internal and external program costs to the respective development programs. We also incur indirect costs that are not allocated to specific programs because such costsbenefit multiple development programs and allow us to increase our pharmaceutical development capabilities. These consist of internal shared resources related to the developmentand maintenance of systems and processes applicable to all of our programs. Clinical trial costs are a significant component of research and development expenses and includecosts associated with third-party contractors, and clinical researchF-9Table of Contentsorganizations (“CRO’s"). Invoicing from third-party contractors for services performed can lag several months. We accrue the costs of services rendered in connection with third-party contractor activities based on our estimate of management fees, and costs associated with site monitoring and data management.Employee Stock-Based CompensationThe Company recognizes all employee share-based compensation as a cost in the financial statements. Equity-classified awards principally related to stock options, restricted stockunits (“RSUs”) and performance stock units ("PSUs"), are measured at the grant date fair value of the award. The Company determines grant date fair value of stock optionawards using the Black-Scholes option-pricing model. The fair value of RSUs are determined using the closing price of the Company’s common stock on the grant date. For servicebased vesting grants, expense is recognized over the requisite service period based on the number of options or shares expected to ultimately vest. For PSUs, expense isrecognized over the implicit service period, assuming vesting is probable. No expense is recognized for PSUs if it is not probable the vesting criteria will be satisfied. Forfeitures areaccounted for as they occur. Initial Vesting TermStock Options3 to 4 yearsRestricted Stock Units2 to 3 yearsEarnings (Loss) Per ShareWe calculate our basic earnings per share by dividing net income by the weighted average number of shares outstanding during the period. The diluted earnings per sharecomputation includes the effect, if any, of shares that would be issuable upon the exercise of outstanding stock options, derivative liability, convertible debt and RSUs, reduced by thenumber of shares which are assumed to be purchased by the Company from the resulting proceeds at the average market price during the year, when such amounts are dilutive tothe earnings per share calculation.Cash and Cash EquivalentsWe consider all highly liquid marketable securities with an original maturity of three months or less to be cash equivalents. Due to the short-term maturity of such investments, thecarrying amounts are a reasonable estimate of fair value.Marketable SecuritiesThe Company accounts for marketable securities held as “available-for-sale” in accordance with ASC 320, “Investments Debt and Equity Securities” (“ASC 320”). The Companyclassifies these investments as current assets and carries them at fair value. Unrealized gains and losses are recorded as a separate component of stockholders’ equity asaccumulated other comprehensive loss. Realized gains or losses on marketable security transactions are reported in the Consolidated Statements of Operations andComprehensive Income (Loss). Marketable securities are maintained at one financial institution and are governed by the Company’s investment policy as approved by our Board ofDirectors.Trade and Notes ReceivableTrade Receivables, NetTrade accounts receivable are recorded net of allowances for prompt payment and doubtful accounts. Estimates for allowances for doubtful accounts are determined based onexisting contractual obligations, historical payment patterns and individual customer circumstances. The allowance for doubtful accounts was $0.2 million and $0.3 million atDecember 31, 2017 and 2016, respectively. For the years ended December 31, 2017, 2016 and 2015, bad debt expense recorded in the Statement of Operations andComprehensive Income (Loss) was approximately $0.2 million, $0.2 million and none, respectively.Notes ReceivableNotes receivable arose from the sale of a pediatric priority review voucher (the "PRV"). On July 2, 2015, the Company sold and transferred the PRV to Sanofi for $245.0 million.$150.0 million was received upon closing, and $47.5 million was due on each of the first and second anniversaries of the closing. In accordance with U.S. GAAP, the Companyrecorded the future short term and long term notes receivable at their present value of $46.2 million and $44.9 million, respectively, at the date of the sale using a discount rate of2.8%. The accretion on the notes receivables totaled $0.7 million and$1.9 million for 2017 and 2016, respectively, and is recorded in interest expense, net, in the ConsolidatedStatements of Operations and Comprehensive Income (Loss). The first and second annual payments were received on July 1, 2016 and June 30, 2017 in accordance with theterms of the sale agreement. As of December 31, 2017, there are no outstanding notes receivable.Inventory and Related ReservesInventory, which is recorded at the lower of cost or net realizable value, includes materials, labor, and other direct and indirect costs and are valued using the first-in, first-outmethod. The Company periodically analyzes its inventory levels to identify inventory that may expire prior to expected sale or has a cost basis in excess of its estimated realizablevalue, and writes down such inventory as appropriate. In addition, the Company's products are subject to strict quality control and monitoring which the Company’s manufacturersperform throughout their manufacturing process. The Company does not directly manufacture any product. The Company has single suppliers for products Chenodal and Thiola,and prospectively arranges for manufacture from contract service providers for its product Cholbam. The inventory reserve was $0.7 million and $0.6 million at December 31, 2017and 2016, respectively.F-10Table of ContentsInventory, net of reserve, consisted of the following at December 31, 2017 and 2016 (in thousands): December 31, 2017 December 31, 2016Raw material$3,435 $1,336Finished goods1,916 1,490Total inventory$5,351 $2,826Segment InformationThe Company currently operates in one business segment focused on the development and commercialization of innovative therapies for people with serious and life threateningrare diseases and medical conditions. The Company is not organized by market and is managed and operated as one business. A single management team reports to the chiefoperating decision maker who comprehensively manages the entire business. The Company does not operate any separate lines of business or separate business entities withrespect to its products. Accordingly, the Company does not accumulate discrete financial information with respect to separate products, other than revenues, and does not haveseparately reportable segments.Property and Equipment, netProperty and equipment are stated at cost, net of accumulated depreciation. Depreciation is computed using the straight-line method over the related estimated useful lives aspresented in the table below. Significant additions and improvements are capitalized, while repairs and maintenance are charged to expense as incurred. Property and equipmentpurchased for specific research and development projects with no alternative use is expensed as incurred.The major classifications of property and equipment, including their respective expected useful lives, consists of the following:Computers and equipment3 yearsFurniture and fixtures7 yearsLeasehold improvementsShorter of length of lease or life of the asset Intangible Assets, NetOur intangible assets consist of licenses, purchased technology and acquired in-process research and development (IPR&D). Intangible assets with definite lives are amortized on astraight-line basis over their estimated useful lives and are reviewed periodically for impairment.Intangible assets related to IPR&D projects are considered to be indefinite-lived until the completion or abandonment of the associated research and development efforts. Duringthe period the assets are considered indefinite-lived, they will not be amortized but will be tested for impairment. If and when development is complete, which generally occurs whenregulatory approval to market a product is obtained, the associated assets are deemed finite-lived and are amortized over a period that best reflects the economic benefits providedby these assets.GoodwillGoodwill represents the excess of purchase price over fair value of net assets acquired in a business combination and is not amortized. Goodwill is subject to impairment testing atleast annually or when a triggering event occurs that could indicate a potential impairment. The Company has one segment and one reporting unit and as such reviews goodwill forimpairment at the consolidated level.For the years ended December 31, 2017, 2016 and 2015 there were no impairments to goodwill.Impairment of Long-Lived AssetsOur long-lived assets are primarily comprised of intangible assets and property and equipment. We evaluate our finite-lived intangible assets, other than goodwill and property andequipment, for impairment whenever events or changes in circumstances indicate the carrying value of an asset or group of assets may not be recoverable. If these circumstancesexist, recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset group to future undiscounted net cash flows expected to begenerated by the use and eventual disposition of the asset group. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount bywhich the carrying amount of the assets exceeds the fair value of the assets.In addition, indefinite-lived intangible assets, comprised of IPR&D, are reviewed for impairment annually and whenever events or changes in circumstances indicate that it is morelikely than not that the asset is impaired by comparing the fair value to the carrying value of the asset. To determine the fair value of the asset, the Company used the multi-periodexcess earnings method of the income approach.For the year ended December 31, 2015 the Company wrote off the intangible asset related to Carbetocin and recorded a loss of $4.7 million. There were no impairments related tointangible assets in the years ended December 31, 2017 or 2016.Contingent ConsiderationWe record contingent consideration resulting from a business combination at its fair value on the acquisition date. On a quarterly basis, we revalue these obligations and recordincreases or decreases from their fair value as an adjustment to the consolidated statement of operations. Changes toF-11Table of Contentscontingent consideration obligations can result from changes to discount rates, accretion of the liability due to the passage of time, changes in revenue forecasts and changes in ourestimates of the likelihood or timing of achieving commercial milestones.Income TaxesThe Company follows ASC 740, Income Taxes, which requires recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have beenincluded in the financial statements or tax returns. Under this method, deferred tax assets and liabilities are based on the differences between the financial statement and tax basesof assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. Deferred tax assets are reduced by a valuation allowance tothe extent management concludes it is more likely than not that the asset will not be realized.The standard addresses the determination of whether tax benefits claimed or expected to be claimed on a tax return should be recorded in the financial statements. Under ASC740, the Company may recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxauthorities, based on the technical merits of the position. The tax benefits recognized in the financial statements from such a position should be measured based on the largestbenefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. ASC 740 also provides guidance on de-recognition, classification, interest andpenalties on income taxes, accounting in interim periods and requires increased disclosures. The Company’s policy is to record estimated interest and penalty related to theunderpayment of income taxes or unrecognized tax benefits as a component of its income tax provision.Reclassifications Certain reclassifications have been made to the prior year financial statements in order to conform to the current year’s presentation.PatentsThe Company expenses external costs, such as filing fees and associated attorney fees, incurred to obtain issued patents and patent applications pending. The Company alsoexpenses costs associated with maintaining and defending patents subsequent to their issuance in the period incurred. Derivative Financial Instruments, WarrantsThe Company does not use derivative instruments to hedge exposures to cash flow, market or foreign currency risks. However, certain warrants to purchase common stock that donot meet the requirements for classification as equity, in accordance with the Derivatives and Hedging Topic of the ASC, are classified as liabilities. The Company’s warrants areclassified as liability instruments due to an anti-dilution provision that provides for a reduction to the exercise price of the warrants if the Company issues additional equity or equitylinked instruments in the future at an effective price per share less than the exercise price then in effect. The derivative instrument was initially recorded at its fair value and is thenrevalued at each reporting date, with changes in the fair value reported in the Consolidated Statements of Operations and Comprehensive Income (Loss).Treasury StockThe Company records treasury stock at the cost to acquire it and includes treasury stock as a component of stockholders’ equity until it is retired. As of December 31, 2017 theCompany has no treasury stock.Recently Adopted Accounting PronouncementsIn April 2016, the Financial Accounting Standard Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-09, Compensation —StockCompensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. Specifically, the ASU requires all excess tax benefits and tax deficiencies(including tax benefits of dividends on share-based payment awards) to be recognized as income tax expense or benefit in the income statement. The tax effects of exercised orvested awards should be treated as discrete items in the reporting period in which they occur. An entity also should recognize excess tax benefits, and assess the need for avaluation allowance, regardless of whether the benefit reduces taxes payable in the current period. That is, off balance sheet accounting for net operating losses stemming fromexcess tax benefits would no longer be required and instead such net operating losses would be recognized when they arise. Existing net operating losses that are currently trackedoff balance sheet would be recognized, net of a valuation allowance if required, through an adjustment to opening retained earnings in the period of adoption. Entities will no longerneed to maintain and track an “APIC pool.” The ASU also requires excess tax benefits to be classified along with other income tax cash flows as an operating activity in thestatement of cash flows. In addition, the ASU elevates the statutory tax withholding threshold to qualify for equity classification up to the maximum statutory tax rates in the applicablejurisdiction(s). The ASU also clarifies that cash paid by an employer when directly withholding shares for tax withholding purposes should be classified as a financing activity. TheASU provides an optional accounting policy election (with limited exceptions), to be applied on an entity-wide basis, to either estimate the number of awards that are expected tovest (consistent with GAAP) or account for forfeitures when they occur. Upon adoption, all of the tax effects related to share-based payments at settlement (or expiration) will berecorded through the income statement. The Company adopted this ASU as of January 1, 2017 using a prospective transition method related to the presentation of excess taxbenefits on the statement of cash flows. In 2016 and 2015, the Company would have recorded a tax expense of $0.4 million and a tax benefit of $2.4 million, respectively.In August 2016, the FASB issued ASU No. 2016-15,Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. Theseamendments provide cash flow statement classification guidance for: 1. Debt Prepayment or Debt Extinguishment Costs; 2. Settlement of Zero-Coupon Debt Instruments or OtherDebt Instruments with Coupon Interest Rates That Are Insignificant in Relation to the Effective Interest Rate of the Borrowing; 3. Contingent Consideration Payments Made after aBusiness Combination; 4. Proceeds from the Settlement of Insurance Claims; 5. Proceeds from the Settlement of Corporate-Owned Life Insurance Policies, including Bank-OwnedLife Insurance Policies; 6.F-12Table of ContentsDistributions Received from Equity Method Investees; 7. Beneficial Interests in Securitization Transactions; and 8. Separately Identifiable Cash Flows and Application of thePredominance Principle. This ASU became effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years.The Company has elected to adopt this guidance in the fourth quarter of year ended December 31, 2017, which applied retrospectively, reclassifies portions of payments made forcontingent consideration in the financing section to the operation section of the Consolidated Statements of Cash Flows. The reclassification on the Consolidated Statements ofCash Flows was $1.9 million and $0.8 million for 2016 and 2015, respectively.In October 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory. The new guidance changes theaccounting for income tax effects of intra-entity transfers of assets other than inventory. Under the new guidance, the selling (transferring) entity is required to recognize a currenttax expense or benefit upon transfer of the asset. Similarly, the purchasing (receiving) entity is required to recognize a deferred tax asset or deferred tax liability, as well as therelated deferred tax benefit or expense, upon receipt of the asset. As of January 1, 2017, the Company reversed the balance of $4.9 million in its prepaid tax asset account as acharge to retained earnings.Recently Issued Accounting PronouncementsFrom time to time, new accounting pronouncements are issued by the FASB or other standard setting bodies. Unless otherwise discussed, the Company believes that the impact ofrecently issued standards that are not yet effective will not have a material impact on its consolidated financial position or results of operations upon adoption.In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers. Under the new standard, revenue is recognized at the time a good or service istransferred to a customer for the amount of consideration for which the entity expects to be entitled for that specific good or service. Entities may use a full retrospective approach orreport the cumulative effect as of the date of adoption. The Company adopted the new standard on January 1, 2018 using the full retrospective approach and does not expect anyimpact on the timing or recognition of revenue because its only revenue source is product sales and because no variable consideration exists. The new standard also requiresenhanced disclosures about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts. The Company expects to make thesedisclosures in its financial statements for the period ending March 31, 2018.In February 2016, the FASB issued ASU No. 2016-02, Leases. The new standard establishes a right-of-use ("ROU") model that requires a lessee to record a ROU asset and alease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern ofexpense recognition in the income statement. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Amodified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative periodpresented in the financial statements, with certain practical expedients available. The Company is in the process of evaluating the impact of this guidance on its consolidated financialstatements and related disclosures; however, based on the Company's current operating leases, it is expected to have a material impact to the consolidated balance sheet byincreasing assets and liabilities.In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. Topic326 amends guidance on reporting credit losses for assets held at amortized cost basis and available for sale debt securities. For assets held at amortized cost basis, Topic 326eliminates the probable initial recognition threshold in current GAAP and, instead, requires an entity to reflect its current estimate of all expected credit losses. The allowance forcredit losses is a valuation account that is deducted from the amortized cost basis of the financial assets to present the net amount expected to be collected. For available for saledebt securities, credit losses should be measured in a manner similar to current GAAP, however Topic 326 will require that credit losses be presented as an allowance rather thanas a write-down. This ASU update affects entities holding financial assets and net investment in leases that are not accounted for at fair value through net income. The amendmentsaffect loans, debt securities, trade receivables, net investments in leases, off balance sheet credit exposures, reinsurance receivables, and any other financial assets not excludedfrom the scope that have the contractual right to receive cash. This update is effective for fiscal years beginning after December 15, 2019, including interim periods within thosefiscal years. As of December 31, 2017, the Company holds $201.2 million in available for sale debt securities that are affected by this ASU. If adopted as of December 31, 2017, thiswould not have a material impact on financial statements.In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. The new guidance dictates that, whensubstantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, it should be treatedas an acquisition or disposal of an asset. The guidance will be effective for the fiscal year beginning on January 1, 2018, including interim periods within that year (early adoption ispermitted). The Company is currently evaluating the potential effect of the guidance on its consolidated financial statements.In July 2017, the FASB issued ASU No. 2017-11, Earnings Per Share (Topic 260); Distinguishing Liabilities from Equity (Topic 480); Derivatives and Hedging(Topic 815): (Part I) Accounting for Certain Financial Instruments with Down Round Features. These amendments simplify the accounting for certain financial instrumentswith down round features. The amendments require companies to disregard the down round feature when assessing whether the instrument is indexed to its own stock, forpurposes of determining liability or equity classification. Companies that provide earnings per share ("EPS") data will adjust their basic EPS calculation for the effect of the featurewhen triggered (i.e., when the exercise price of the related equity-linked financial instrument is adjusted downward because of the down round feature) and will also recognize theeffect of the trigger within equity. As of and for the year ended December 31, 2017, the Company had warrants with down round features with a fair value of $15.7 million on theConsolidated Balance Sheet and recorded $19.4 million to Consolidated Statement of Operations and Comprehensive Income (Loss). The Company will adopt this ASU as ofJanuary 1, 2018.F-13Table of ContentsIn February 2018, the FASB issued ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The new guidanceaddresses a specific consequence of the Tax Act. This accounting update allows a reclassification from accumulated other comprehensive income to retained earnings for strandedtax effects resulting from the Tax Act. The amendments eliminate the stranded tax effects that were created as a result of the reduction of historical U.S. federal corporate incometax rate to the newly enacted U.S. federal corporate income tax rate. The accounting update is effective January 1, 2019, with early adoption permitted, and is to be applied eitherin the period of adoption or retrospectively to each period in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Act is recognized. The Companyis currently evaluating the potential effect of the guidance on its consolidated financial statements.NOTE 3. BUSINESS COMBINATION AND ASSET TRANSACTIONSAmendment to Trademark License and Supply AgreementOn November 3, 2017, the Company amended their agreement with the manufacturer of Thiola to extend the term of the current exclusive U.S. and Canada licensing agreementby an additional five years, to 2029. The royalty rate and guaranteed minimum payment were also extended through the new agreement term. Upon execution of the amendment,the Company capitalized an additional $5.9 million in intangible assets and recorded a guaranteed minimum liability for the same amount.Acquisition of Liquid Ursodeoxycholic Acid (L-UDCA)On June 20, 2016, the Company signed a definitive agreement to purchase the rights, titles, licenses and ownership of L-UDCA from Asklepion Pharmaceuticals, LLC ("Asklepion").The acquisition was accounted for under the acquisition method of accounting in accordance with Accounting Standard Codification ("ASC") 805. The fair value of assets acquiredand liabilities assumed was based upon an independent third-party valuation and the Company’s estimates. Critical estimates in valuing certain intangible assets include but are notlimited to future expected cash flows from acquired product rights for L-UDCA, licenses, trade names and developed technologies, present value and discount rates. Management’sestimates of fair value are based upon assumptions believed to be reasonable, but which are inherently uncertain and unpredictable and, as a result, actual results may differ fromestimates.The purchase included $25.5 million for an intangible asset with a definite life related to product rights in the U.S. The useful life related to the acquired product rights is expected tobe approximately 17 years once the NDA is approved by the FDA. Until approval, the asset is considered IPR&D with an indefinite life and is not amortized.The contingent consideration of $25.0 million (present value) recorded during the period ended June 30, 2016, is related to an agreement to pay an additional cash amount in theform of milestones and sales royalties through 2035. The accrued contingent consideration was recorded as a liability at acquisition-date fair value using the income approach withan assumed discount rate of 12.0% over the applicable term. The undiscounted amount the Company could pay as contingent consideration under the agreement is up to $70.3million.The purchase price allocation of $25.5 million as of the acquisition completion date of June 16, 2016 was as follows (in thousands):Cash paid upon consummation$500Present value of contingent consideration25,000Total purchase price$25,500Fair Value of Assets Acquired and Liabilities Assumed Acquired product rights: L-UDCA (intangible asset)$25,500Total purchase price$25,500Unaudited pro forma information for the transaction is not presented, because the effects of such transaction are considered immaterial to the Company.Acquisition of Cholbam (cholic acid)On January 12, 2015, the Company signed a definitive agreement under which it acquired the exclusive right to purchase from Asklepion, all worldwide rights, titles, and ownershipof Cholbam (cholic acid) for the treatment of bile acid synthesis disorders, if approved by the FDA. Under the terms of the agreement, the Company paid Asklepion an upfrontpayment of $5.0 million and agreed to pay milestones based on FDA approval and net product sales, plus tiered royalties on future net sales of Cholbam.On March 18, 2015, the FDA approved Cholbam capsules, the first FDA approved treatment for pediatric and adult patients with bile acid synthesis disorders due to single enzymedefects, and for patients with peroxisomal disorders (including Zellweger spectrum disorders). As a result of the approval, the Company exercised its right to purchase fromAsklepion all worldwide rights, titles, and ownership of Cholbam and related assets. The FDA also granted Asklepion a Rare Pediatric Disease Priority Review Voucher ("PediatricPRV"), awarded to encourage development of new drugs and biologics for the prevention and treatment of rare pediatric diseases. A Pediatric PRV is transferable and provides thebearer with FDA priority review classification for a new drug application. The Pediatric PRV was transferred to Retrophin under the original terms of the agreement with Asklepion.On March 31, 2015, the Company completed its acquisition from Asklepion of all worldwide rights, titles and ownership of Cholbam, including all related contracts, data assets,intellectual property, regulatory assets and the Pediatric PRV, in exchange for a cash payment of $28.4 million, in addition to approximately 661,279 shares of the Company’scommon stock (initially valued at $9 million at the time of the definitive agreement with Asklepion, andF-14Table of Contents$15.8 million at the acquisition completion date). The Company is also required to pay contingent consideration consisting of milestones and tiered royalties with a present value of$39.1 million.The original asset value of the Pediatric PRV was recognized at $96.3 million. In this valuation process, we considered various factors which included data from recent sales ofsimilar vouchers. The consideration paid to Asklepion did not value the Pediatric PRV because the issuance of a Pediatric PRV is extremely rare. Therefore when the FDA grantedthe Pediatric PRV with the Cholbam approval, a bargain purchase gain resulted.The acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805. The fair value of assets acquired and liabilities assumed was basedupon an independent third-party valuation and the Company’s estimates. Critical estimates in valuing certain intangible assets include but are not limited to future expected cashflows from acquired product rights-Cholbam, Pediatric PRV, trade names and developed technologies, present value and discount rates. Management’s estimates of fair value arebased upon assumptions believed to be reasonable, but which are inherently uncertain and unpredictable and, as a result, actual results may differ from estimates.The purchase included $83.2 million of intangible assets with definite lives related to product rights with values of $75.9 million for the U.S. and $7.3 million for the internationalrights. The useful lives related to the acquired product rights are expected to be approximately 10 years.The contingent consideration of $39.1 million recorded during the year ended December 31, 2015 is related to an agreement to pay an additional cash amount based on theproduct performance through 2025. The accrued contingent consideration was recorded as a liability at acquisition-date fair value using the income approach with assumeddiscount rates of 19.0% over the applicable term. The undiscounted amount the Company could pay as contingent consideration under the agreement is up to $78.4 million.Service fees with a net present value of $2.9 million were recorded during the year ended December 31, 2015. The net present value is based upon $4.0 million in total paymentsover a four year period starting as of the acquisition date.As part of the business combination the Company recorded a deferred tax liability of $39.9 million. The deferred tax liability is derived from the difference in the Company's bookbasis and tax basis in the assets acquired of $88.5 million. Our tax rate utilized is 45.4%.The purchase price allocation of $91.3 million as of the acquisition completion date of March 31, 2015 was as follows (in thousands):Cash paid upon consummation$33,430Present value of contingent consideration and service fees42,010Fair Value of 661,279 shares issued to Asklepion15,844Total Purchase Price$91,284Fair Value of Assets Acquired and Liabilities Assumed Acquired product rights-Cholbam (Intangible Asset)$83,200Pediatric Priority Review Voucher96,250Inventory777Deferred tax liability(39,880)Total Allocation of Purchase Price140,347Bargain Purchase Gain(49,063)Total Purchase Price$91,284Divestiture of Assets:Sale of Assets to SanofiThe FDA granted Asklepion a Pediatric PRV, awarded to encourage development of new drugs and biologics for the prevention and treatment of rare pediatric diseases. APediatric PRV is transferable and provides the bearer with FDA priority review classification for a new drug application. The Pediatric PRV was transferred to the Company underthe terms of the asset purchase agreement between the Company and Asklepion dated January 12, 2015, pursuant to which the Company acquired Cholbam.On July 2, 2015, the Company sold and transferred the Pediatric PRV to Sanofi for $245.0 million. $150.0 million was received upon closing, and $47.5 million was due on each ofthe first and second anniversaries of the closing. In accordance with U.S. GAAP, the Company recorded the future short term and long term notes receivable at their present valueof $46.2 million and $44.9 million, respectively, at the date of the sale using a discount rate of 2.8%. The gain from the sale of the asset was approximately $140.0 million, net of$4.9 million in fees contractually due as part of the Cholbam acquisition. The first and second annual payments were received on July 1, 2016 and June 30, 2017 in accordance withthe terms of the sale agreement.Sale of Assets to Turing PharmaceuticalsOn October 13, 2014, the Company entered into a binding Summary Separation Proposal with its then-current Chief Executive Officer. Among other things, the SummarySeparation Proposal set forth the terms for the sale of the Company’s Vecamyl, Syntocinon and ketamine licenses and assets to Turing Pharmaceuticals, a company controlled bythe former Chief Executive Officer.On January 9, 2015, the Company entered into a purchase agreement with Turing Pharmaceuticals pursuant to which the Company sold Turing Pharmaceuticals its ketaminelicenses and assets ("Assets") for a purchase price of $1.0 million, and pursuant to which Turing Pharmaceuticals also assumed all future liabilities related to the Assets.F-15Table of ContentsOn February 13, 2015, Retrophin, Inc., its wholly-owned subsidiary Manchester and its other wholly-owned subsidiary Retrophin Therapeutics International, LLC (collectively, the"Sellers") entered into a purchase agreement with Waldun Pharmaceuticals, LLC ("Waldun"), pursuant to which the Sellers sold Waldun the product rights to mecamylaminehydrochloride ("Vecamyl Product Rights") for a purchase price of $0.7 million. Waldun in turn sold the Vecamyl Product Rights to Turing Pharmaceuticals. In connection therewith,on February 13, 2015, the Company, together with Manchester, entered into an asset purchase agreement with Turing Pharmaceuticals, pursuant to which the Company soldTuring Pharmaceuticals their mecamylamine hydrochloride inventory ("Inventory") for a purchase price of $0.3 million. Turing Pharmaceuticals also assumed certain liabilities relatedto the Vecamyl Product Rights and the Inventory.On February 13, 2015, the Company entered into an asset purchase agreement with Turing Pharmaceuticals pursuant to which the Company sold Turing Pharmaceuticals itsoxytocin assets, including related inventory, for a purchase price of $1.1 million, and pursuant to which Turing Pharmaceuticals also assumed certain liabilities related to the oxytocinassets.The effect on the statement of operations and comprehensive income (loss) for 2015 was a gain of approximately $0.9 million.NOTE 4. MARKETABLE SECURITIESThe Company's marketable securities as of December 31, 2017 and 2016 were comprised of available-for-sale marketable securities which are carried at fair value, with theunrealized gains and losses reported in accumulated other comprehensive income (loss). The amortized cost of debt securities in this category are adjusted for amortization ofpremiums and accretion of discounts to maturity. Such amortization and accretion is included in interest income (loss). Realized gains and losses and declines in value judged to beother-than-temporary, if any, on available-for-sale securities are included in other income or expense. The cost of securities sold is based on the specific identification method.Interest and dividends on securities classified as available-for-sale are included in interest income. All available-for-sale securities are classified as current assets, even if the maturitywhen acquired by the Company is greater than 1 year due to the possibility of liquidation within the next 12 months.Marketable securities consist of the following (in thousands): As of December 31, 2017 2016Marketable Securities: Commercial paper6,897 30,303Corporate debt securities164,297 134,570Securities of government sponsored entities30,042 49,998Total Marketable Securities:$201,236 $214,871The following is a summary of short-term marketable securities classified as available-for-sale as of December 31, 2017 (in thousands): Contractual Maturity (inyears) Amortized Cost Unrealized Losses Aggregate EstimatedFair ValueMarketable Securities: Commercial paperLess than 1 $6,911 $(14) $6,897Corporate debt securitiesLess than 1 86,531 (198) 86,333Securities of government-sponsored entitiesLess than 1 30,132 (90) 30,042Total maturity less than 1 year 123,574 (302) 123,272Corporate debt securities1 to 2 78,388 (424) 77,964Total maturity 1 to 2 years 78,388 (424) 77,964Total available-for-sale securities $201,962 $(726) $201,236F-16Table of ContentsThe following is a summary of short-term marketable securities classified as available-for-sale as of December 31, 2016 (in thousands): Contractual Maturity(in years) Amortized Cost Unrealized Gains Unrealized Losses Aggregate EstimatedFair ValueMarketable Securities: Commercial paperLess than 1 $30,330 $— $(27) $30,303Corporate debt securitiesLess than 1 64,794 7 (91) 64,710Securities of government-sponsored entities 19,500 — (10) 19,490Total maturity less than 1 year 114,624 7 (128) 114,503Corporate debt securities1 to 2 70,207 — (347) 69,860Securities of government-sponsored entities1 to 2 30,583 — (75) 30,508Total maturity 1 to 2 years 100,790 — (422) 100,368Total available-for-sale securities $215,414 $7 $(550) $214,871During 2017, the Company had no gains or losses on marketable securities. During 2016, the Company recognized a gain of less than $0.1 million on marketable securities. During2015, the Company recognized a loss of $0.3 million on marketable securities. The Company had proceeds from the sale or maturity of marketable securities of $114.5 million,$159.5 million and $10.0 million for 2017, 2016 and 2015, respectively.The primary objective of the Company’s investment portfolio is to enhance overall returns while preserving capital and liquidity. The Company’s investment policy limits interest-bearing security investments to certain types of instruments issued by institutions with primarily investment grade credit ratings and places restrictions on maturities andconcentration by asset class and issuer.The Company reviews the available-for-sale investments for other-than-temporary declines in fair value below cost basis each quarter and whenever events or changes incircumstances indicate that the cost basis of an asset may not be recoverable. This evaluation is based on a number of factors, including the length of time and the extent to whichthe fair value has been below the cost basis and adverse conditions related specifically to the security, including any changes to the credit rating of the security, and the intent to sell,or whether the Company will more likely than not be required to sell the security before recovery of its amortized cost basis. The assessment of whether a security is other-than-temporarily impaired could change in the future due to new developments or changes in assumptions related to any particular security. As of December 31, 2017 and 2016, theCompany believed the cost basis for available-for-sale investments were recoverable in all material respects. For both December 31, 2017 and 2016, any investments in anunrealized loss position for longer than 12 months were immaterial.NOTE 5. DERIVATIVE FINANCIAL INSTRUMENTSSince 2013, the Company has issued 5 tranches of common stock purchase warrants to secure financing, remediate covenant violations related to the Credit Facility (See Note. 10)and provide consideration for Credit Facility amendments.The Company accounts for derivative financial instruments in accordance with ASC 815-40, “Derivative and Hedging – Contracts in Entity’s Own Equity” (“ASC 815-40”), in whichinstruments which do not have fixed settlement provisions are deemed to be derivative instruments. The Company’s warrants are classified as liability instruments due to an anti-dilution provision that provides for a reduction to the exercise price of the warrants if the Company issues additional equity or equity linked instruments in the future at an effectiveprice per share less than the exercise price then in effect.Issuances2015On January 12, 2015, the Company entered into Amendment No. 3 to the Credit Facility, in which the Company obtained a commitment letter from Athyrium Capital Management,LLC and Perceptive Credit Opportunities Fund, LP (collectively, the “ Lenders”), the Company’s existing lenders, providing a commitment for a senior secured incremental term loanunder the Company’s existing term loan facility in an aggregate principal amount of $30 million, which could have been drawn down at the Company’s option to finance theacquisition of the assets of Asklepion.As consideration for the commitment letter for the Incremental Loan, the Company made a cash payment to the Lenders and issued the Lenders warrants initially exercisable topurchase up to an aggregate of 125,000 shares of the Company’s common stock. The Company recorded $1.05 million of interest expense related to the warrants upon issuance.The Company calculated the fair value of the warrants using the Monte Carlo Simulation utilizing the following assumptions as of the grant date of the warrants:F-17Table of ContentsRisk free rate1.39%Expected volatility85%Expected life (in years), represents the weighted average period until next liquidity event0.3Expected dividend yield—Exercise Price$13.252014In connection with the execution of the Credit Facility, the Company issued warrants to the lenders under the Credit Facility, initially exercisable to purchase up to an aggregate of337,500 shares of common stock of the Company. The Warrants are exercisable in whole or in part, at an initial exercise price per share of $12.76 per share, which is subject toweighted-average anti-dilution protections. The Warrants may be exercised at any time upon the election of the holder, beginning on the date of issuance and ending on the fifthanniversary of the date of issuance.The total grant date fair value of the Warrants was $2.5 million, was recorded as a derivative liability, and is included in the debt discount to the note payable in the ConsolidatedBalance Sheets.The Company calculated the fair value of the warrants using the Binomial Lattice pricing model using the following assumptions as of the grant date of the Warrants:Risk free rate1.62%Expected volatility85%Expected life (in years), represents the weighted average period until next liquidity event0.36Expected dividend yield—Exercise Price$12.76On November 13, 2014, the Company entered into Amendment No. 2 to the Credit Facility which allowed the Company to be in compliance with certain covenants as of September30, 2014. In addition certain covenants related to the 4th quarter of fiscal 2014 and 2015 were amended. As compensation for Amendment No. 2, the Company agreed to issueadditional warrants to the lenders, initially exercisable to purchase an aggregate of 300,000 shares of common stock of the Company which were valued at $2.2 million as ofNovember 13, 2014, with an exercise price of $9.96 per share, and was recorded in change in fair value of derivative instruments in the 2014 Consolidated Statements ofOperations and Comprehensive Income (Loss).Re-measurementThe warrants are re-measured at each balance sheet date based on estimated fair value. Changes in estimated fair value are recorded as non-cash valuation adjustments withinother income (expenses) in the Company’s accompanying Consolidated Statements of Operations and Comprehensive Income (Loss). The Company recorded a change in theestimated fair value of warrants of a loss of $4.5 million, gain of $1.7 million, and loss of $33.3 million during the years ended December 31, 2017, 2016 and 2015, respectively.The Company calculated the fair value of the warrants using the Black-Scholes model as of December 31, 2017 and Monte Carlo Simulation as of December 31, 2016, using thefollowing assumptions: As of December 31, 2017 December 31, 2016Fair value of common stock$21.07 $18.93Remaining Life (in years) of the Warrants.1 – 2.0 years 1.2 – 3.0 yearsRisk-free interest rate1.39 - 1.89% .89 - 1.48%Expected volatility33 - 43% 55 - 75%Dividend yield— —Expected volatility is based on an analysis of the Company’s volatility. The risk free interest rate is based on the U.S. Treasury security rates for the remaining term of the warrantsat December 31, 2017. F-18Table of ContentsThe following tables presents the Company’s derivative warrant issuances and balances outstanding during the years ended December 31, 2017 and 2016: Weighted Average Warrants Exercise Price Grant DateFair ValueOutstanding at December 31, 20143,421,355 $6.43 $3.79Issued125,000 $13.25 $8.40Canceled— $— $—Exercised880,807 $5.35 $3.23Outstanding at December 31, 20152,665,548$7.05 $4.20Issued—— —Canceled—— —Exercised898,6436.68 4.85Outstanding at December 31, 20161,766,905$7.23 $3.87Issued— — —Canceled— — —Exercised607,481 6.00 3.33Outstanding at December 31, 20171,159,424 $7.86 $4.15The following information applies to derivative warrants outstanding at December 31, 2017:ExercisePrice Number of Warrants Weighted Average RemainingContractual Life (years) Number Exercisable$3.60 168,336 0.10 168,336$6.00 611,921 0.60 611,921$12.76 337,500 1.50 337,500$13.25 41,667 2.00 41,667The total intrinsic value of derivative warrants outstanding and exercisable as of December 31, 2017 was $15.3 million. The Company’s closing stock price was $21.07 onDecember 31, 2017. NOTE 6. FAIR VALUE MEASUREMENTSFinancial Instruments and Fair ValueThe Company accounts for financial instruments in accordance with ASC 820, “Fair Value Measurements and Disclosures” (“ASC 820”). ASC 820 establishes a fair value hierarchythat prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identicalassets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy under ASC 820 aredescribed below:Level 1 – Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;Level 2 – Quoted prices in markets that are not active or financial instruments for which all significant inputs are observable, either directly or indirectly; andLevel 3 – Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable.In estimating the fair value of the Company’s derivative liabilities, the Company used the Black Scholes method as of December 31, 2017 and the Monte Carlo Simulation as ofDecember 31, 2016. Based on the fair value hierarchy, the Company classified the derivative liability within Level 3.In estimating the fair value of the Company’s contingent consideration, the Company used the probability-based expected method as of December 31, 2017 and the comparableuncontrolled transaction (“CUT”) method in 2016 for royalty payments based on projected revenues. Based on the fair value hierarchy, the Company classified contingentconsideration within Level 3 because valuation inputs are based on projected revenues discounted to a present value.Financial instruments with carrying values approximating fair value include cash and cash equivalents, accounts receivable, notes receivable, deposits on lease agreements, andaccounts payable, due to their short term nature.The following table presents the Company’s asset and liabilities that are measured and recognized at fair value on a recurring basis, classified under the appropriate level of the fairvalue hierarchy as of December 31, 2017 (in thousands):F-19Table of Contents As of December, 2017 Fair Value Hierarchy at December 31, 2017 Total carrying andestimated fair value Quoted prices inactive markets(Level 1) Significant otherobservable inputs(Level 2) Significantunobservableinputs (Level 3)Asset: Cash and Cash Equivalents$99,394 $92,726 $6,668 $—Marketable securities, available-for-sale201,236 — 201,236 —Total$300,630 $92,726 $207,904 $—Liabilities: Derivative liability related to warrants$15,710 $— $— $15,710Business combination-related contingent consideration90,000 — — 90,000Total$105,710 $— $— $105,710The following table presents the Company’s assets and liabilities that are measured and recognized at fair value on a recurring basis, classified under the appropriate level of thefair value hierarchy as of December 31, 2016 (in thousands): As of December, 2016 Fair Value Hierarchy at December 31, 2016 Total carrying andestimated fair value Quoted prices inactive markets(Level 1) Significant otherobservable inputs(Level 2) Significantunobservableinputs (Level 3)Asset: Cash and Cash Equivalents$41,002 $39,929 $1,073 $—Marketable securities, available-for-sale214,871 — 214,871 —Total$255,873 $39,929 $215,944 $—Liabilities: Derivative liability related to warrants$22,440 $— $— $22,440Business combination-related contingent consideration87,478 — — 87,478Total$109,918 $— $— $109,918The following table sets forth a summary of changes in the estimated fair value of the Company’s Level 3 derivative liability for years ended December 31, 2017 and 2016 (inthousands): Fair Value Measurements of Common Stock WarrantsUsing Significant Unobservable Inputs (Level 3) 2017 2016Balance at January 1,$22,440 $38,810Reclassification of derivative liability to equity upon exercise of warrants(11,221) (14,715)Change in estimated fair value of liability classified warrants4,491 (1,655)Balance at December 31,$15,710 $22,440The following table sets forth a summary of changes in the estimated fair value of the Company's Level 3 business combination-related contingent consideration for the years endedDecember 31, 2017 and 2016 (in thousands): Fair Value Measurements of Acquisition-Related ContingentConsideration (Level 3) 2017 2016Balance at January 1,$87,478 $59,021Present value of contingent consideration upon acquisition related to a business combination— 25,000Increase from revaluation of contingent consideration19,389 18,383Contractual Payments(6,006) (12,826)Contractual Payments accrued at December 31(11,012) (1,988)Foreign currency impact151 (112)Balance at December 31,$90,000 $87,478F-20Table of ContentsNOTE 7. INTANGIBLE ASSETSAmortizable intangible assetsLigand License AgreementIn 2013, the Company entered into a $2.5 million agreement with Ligand for a worldwide sublicense to develop, manufacture and commercialize a drug technology compoundincluding sparsentan (the “Ligand License Agreement”). The cost of the Ligand License Agreement, which is presented net of amortization in the accompanying ConsolidatedBalance Sheet in intangible assets, net, is being amortized to research and development on a straight-line basis through September 30, 2023. As consideration for the license, weare required to make substantial payments upon the achievement of certain milestones, totaling up to $109.4 million. Through 2017, we have made milestone payments to Ligandof $2.6 million under the terms of the Ligand License Agreement. Should we commercialize sparsentan or any products containing related compounds, we will be obligated to pay toLigand an escalating annual royalty between 15% and 17% of net sales of all such products.In September 2015, the Ligand License Agreement was amended to facilitate sub-licensing in Asia-Pacific. As consideration for the amendment the Company paid $1.0 million.Carbetocin TechnologyIn September 2015, the Company wrote-off the entire value of intangible assets related to Carbetocin. The write-off was deemed appropriate as the Company elected not topursue any internal development of the asset and attempts to divest it were unsuccessful. The total charge of $4.7 million was included in operating expenses on the ConsolidatedStatement of Operations and Comprehensive Income (Loss).Manchester Pharmaceuticals LLCThe Company acquired intangible assets with finite lives related to the Chenodal product rights, trade names, and customer relationships with the values of $67.8 million, $0.2million, and $0.4 million, respectively. The useful lives related to the acquired product rights, trade names, and customer relationships are expected to be approximately 16, 1 and,10 years, respectively. Amortization of product rights, trade names and customer relationships are being recorded in selling, general and administrative expense over theirrespective lives.In 2015, the Company divested the assets related to Vecamyl, valued at $3.6 million, to Turing Pharmaceuticals.Thiola License AgreementIn 2014, the Company entered into a license agreement with Mission Pharmacal, in which the Company obtained an exclusive, royalty-bearing license to market, sell andcommercialize Thiola (Tiopronin) in the United States and Canada, and a non-exclusive license to use know-how relating to Thiola to the extent necessary to market Thiola. Theinitial term of the license is 10 years and will automatically renew thereafter for periods of one year.The Company paid Mission an up-front license fee of $3 million and will pay guaranteed minimum royalties during each calendar year the greater of $2 million or twenty percent(20%) of the Company’s net sales of Thiola through June 30, 2024. The present value of guaranteed minimum royalties payable using a discount rate of approximately 11% basedon the Company’s then borrowing rate is $15.1 million and $10.1 million as of December 31, 2017 and 2016, respectively. As of December 31, 2017, the guaranteed minimumroyalty current and long term liability was approximately $2.0 million and $13.1 million, respectively, and is recorded as guaranteed minimum royalty in the Consolidated BalanceSheet. As of December 31, 2016, the guaranteed minimum royalty current and long term liability was approximately $2.0 million and $8.1 million, respectively, and is recorded asguaranteed minimum royalty in the Consolidated Balance Sheet. The Company has capitalized $54.5 million related to the Thiola intangible asset which consists of the up-frontlicense fee, professional fees, present value of the guaranteed minimum royalties and any additional payments through 2017 in excess of minimum royalties.On November 3, 2017, the Company amended its agreement with the manufacturer of Thiola to extend the term of the current exclusive U.S. and Canada licensing agreement byan additional five years, to 2029. The royalty rate and guaranteed minimum payment were also extended through the new agreement term. Upon execution of the amendment, theCompany capitalized an additional $5.9 million in intangible assets and recorded a guaranteed minimum liability for the same amount.There are 11.5 years remaining in the term of the license agreement.Cholbam (Kolbam) Asset PurchaseOn March 31, 2015, the Company completed its acquisition from Asklepion of all worldwide rights, titles and ownership of Cholbam, including all related contracts, data assets,intellectual property, regulatory assets and the PRV. The Company capitalized $75.9 million and $7.3 million for the U.S. and international economic interest, respectively.L-UDCAOn June 20, 2016, the Company signed a definitive agreement to purchase the rights, titles, and ownership of L-UDCA from Asklepion. The purchase included $25.5 million for anintangible asset with a definite life related to product rights for the U.S. The useful life related to the acquired product rights is expected to be approximately 17 years once the NDAis approved by the FDA. Until approval, the asset is considered IPR&D with an indefinite life and is not amortized.F-21Table of ContentsAmortizable intangible assets as of December 31, 2017 (in thousands): Useful LifeGross CarryingAmount AccumulatedAmortization Net Book ValueChenodal Product Rights16$67,849 $(15,976) $51,873Thiola License1554,471 (10,168) 44,303Economic Interest - U.S. revenue Cholbam1075,900 (20,903) 54,997Economic Interest - International revenue Cholbam108,058 (2,219) 5,839Economic Interest - L-UDCA (acquired IPR&D)Indefinite25,500 —25,500Ligand License113,300 (1,420) 1,880Manchester Customer Relationships10403 (152) 251Manchester Trade Name1175 (175) —Internal use software5$207 $(33) $174Total $235,863 $(51,046) $184,817Amortizable intangible assets as of December 31, 2016 (in thousands): Useful LifeGross CarryingAmount AccumulatedAmortization Net Book ValueChenodal Product Rights16$67,849 $(11,738) $56,111Thiola License1035,339 (5,818) 29,521Economic Interest - U.S. revenue Cholbam1075,900 (13,320) 62,580Economic Interest - International revenue Cholbam107,074 (1,241) 5,833Economic Interest - L-UDCA (acquired IPR&D)Indefinite25,500 — 25,500Ligand License113,300 (1,093) 2,207Manchester Customer Relationships10403 (112) 291Manchester Trade Name1175 (175) —Total $215,540 $(33,497) $182,043The following table summarizes amortization expense for the twelve months ended December 31, 2017, 2016 and 2015 (in thousands): 2017 2016 2015Research and development$327 $328 $697Selling, general and administrative17,004 15,665 12,534Total amortization expense$17,331 $15,993 $13,231As of December 31, 2017, amortization expense (excluding infinite lived IPR&D) for the next five years is expected to be as follows (in thousands):2018$16,871201916,871202016,871202116,871202216,871Thereafter74,962Total$159,317F-22Table of ContentsNOTE 8. ACCRUED EXPENSES Accrued expenses consist of the following at December 31, 2017 and 2016 (in thousands): 2017 2016Compensation related costs$7,749 $7,441Research and development6,989 7,311Government rebate reserves5,883 6,967Selling, general and administrative3,896 3,333Royalty/contingent consideration6,429 5,766Restructuring expenses3,549 893Miscellaneous accrued expenses1,523 1,597Total accrued expenses$36,018 $33,308NOTE 9. NOTES PAYABLEConvertible Notes PayableOn May 29, 2014, the Company entered into a Note Purchase Agreement relating to a private placement by the Company of $46 million aggregate principal senior convertiblenotes due 2019 (the “Notes”) which are convertible into shares of the Company’s common stock at an initial conversion price of $17.41 per share. The conversion price is subject tocustomary anti-dilution protection. The Notes bear interest at a rate of 4.5% per annum, payable semiannually in arrears on May 15 and November 15 of each year, beginning onNovember 15, 2014. The Notes mature on May 30, 2019 unless earlier converted or repurchased in accordance with the terms. The aggregate carrying value of the Notes on theirissuance was $43 million, which was net of the $3 million debt discount.On June 30, 2014, the Company issued 401,047 shares of common stock to the holders of the Notes and such noteholders granted the Company a release of certain claims theymay have had in connection with the Company's sale of the Notes or certain statements made by the Company in connection with such sale. The Company recorded financeexpense as other expense in the amount of $4.7 million for the year ended December 31, 2014 based on the fair market value of the stock on the date of issuance in relation to theshares issued.As of December 31, 2017 the fair value of a share of common stock was $21.07, exceeding the initial conversion price per share of the Notes. If the debt holders were to convertthe Company would be required to issue 2,642,160 shares of common stock assuming that no fundamental change in the Company had occurred. The Company has reservedsufficient shares of its common stock to satisfy the conversion requirements related to the Notes. As of December 31, 2017, the convert value exceeded the carrying value byapproximately $10.5 million.In estimating the fair value of the Company’s convertible debt, the Company performed an analysis on the straight-debt portion, excluding the conversion feature and the conversionfeature. To estimate the fair value of conversion feature, the Company used the Monte Carlo Simulation as of December 31, 2017. To estimate the fair value of straight-debtportion, excluding the conversion feature, the Company discounted to present value the scheduled coupon payments and principal repayment, using an appropriate fair marketyield. As of December 31, 2017 the fair value of the debt was estimated at $63.6 million using level 2 inputs.The net carrying amount of the Notes consists of the following (in thousands): December 31, 2017 2016Aggregate principle amount of Notes$46,000 $46,000Unamortized debt discount and debt issuance costs(923) (1,578) $45,077 $44,422Credit FacilityIn June 2014, the Company entered into a $45 million Credit Agreement (“Credit Facility”) which bore interest at an annual rate of (i) the Adjusted LIBOR Rate (as such term wasdefined in the Credit Facility) plus 10.00% or (ii) in certain circumstances, the Base Rate (as such term was defined in the Credit Agreement) plus 9.00% and was payable quarterly.The Credit Facility contained certain financial and non-financial covenants.In connection with the execution of the Credit Facility, the Company issued warrants (the “Warrants”) to the lenders under the Credit Facility, initially exercisable to purchase up toan aggregate of 337,500 shares of common stock of the Company. The Warrants are exercisable in whole or in part, at an initial exercise price per share of $12.76 per share,which is subject to weighted-average anti-dilution protections. The Warrants could be exercised at any time upon the election of the holder, beginning on the date of issuance andending on the fifth anniversary of the date of issuance. The issuance of the Warrants was not registered under the Securities Act of 1933, as amended (the “Securities Act”), assuch issuance was exempt from registration under Section 4(2) of the Securities Act.The total grant date fair value of the Warrants was $2.5 million, was recorded as a derivative liability, and was included in the debt discount to the note payable in the 2014Consolidated Balance Sheets.F-23Table of ContentsThe Company calculated the fair value of the warrants using the Binomial Lattice pricing model using the following assumptions as of the grant date of the Warrants:Risk free rate1.62%Expected volatility85%Expected life (in years), represents the weighted average period until next liquidity event0.36Expected dividend yield—Exercise Price$12.76In November 2014, the Company entered into Amendment No. 2 (“Amendment No. 2”) to the Credit Facility which allowed the Company to be in compliance with certain covenantsas of September 30, 2014. In addition certain covenants related to the fourth quarter of fiscal 2014 and 2015 were amended. As compensation for Amendment No. 2, theCompany agreed to issue additional warrants to Athyrium Capital Management, LLC and Perceptive Credit Opportunities Fund, LP (collectively, the “Lenders”), initially exercisableto purchase an aggregate of 300,000 shares of common stock of the Company which were valued at $2.2 million and recorded in change in fair value of derivative instruments inthe 2014 Consolidated Statements of Operations and Comprehensive Income (Loss).On January 12, 2015, the Company entered into Amendment No. 3 (“Amendment No. 3”) to the Credit Facility in which the Company obtained a commitment letter from theLenders, providing a commitment for a senior secured incremental term loan under the Company’s existing term loan facility in an aggregate principal amount of $30.0 million, whichcould have been drawn down at the Company’s option to finance the acquisition of the Cholbam assets from Asklepion.As consideration for Amendment No. 3, the Company made a $0.6 million cash payment to the Lenders, recorded in finance expense in the Consolidated Statements of Operationsand Comprehensive Income (Loss), and issued the Lenders warrants initially exercisable to purchase up to an aggregate of 125,000 shares of the Company’s common stock whichwere valued at $1.1 million on January 12, 2015 and were recorded in interest expense in the Consolidated Statements of Operations and Comprehensive Income (Loss). Due tothe closing of its public offering on March 24, 2015, the Company received cash proceeds of $140.0 million, after deducting underwriting fees and other offering costs, which theCompany used to make the $27.0 million payment due to Asklepion upon the closing of the Company’s acquisition of the Cholbam assets, and as a result, the Company did notutilize the commitment from the Lenders.On July 1, 2015, the Company paid off the Credit Facility in its entirety including a prepayment premium of $2.3 million, and incurred an additional charge of $4.2 million, included inother expenses on the Company's Consolidated Statement of Operations and Comprehensive Income (Loss), for the write-off of the debt discount and equity issuances for theCredit FacilityInterest ExpenseTotal interest expense, net, recognized for the years ended December 31, 2017, 2016 and 2015 was $1.2 million, $0.8 million and $7.7 million, respectively.NOTE 10. COMMITMENTS AND CONTINGENCIESLeases and Sublease AgreementsFacilities Base Rent Lease Expiration CommentsOccupied Location Corporate HeadquartersSan Diego CA $2.1 million July 2024 Vacated Location New York NY $0.5 million November 2018 Sublet through expirationContractual CommitmentsThe following table summarizes our principal contractual commitments, excluding open orders that support normal operations, as of December 31, 2017 (in thousands): Total Less than 1 year 1-3 years 3-5 years More than 5 yearsOperating leases$16,037 $2,012 $4,757 $5,046 $4,222Note payable, including contractual interest71,933 4,070 50,863 4,000 13,000Sales support services2,638 417 833 833 555Product supply contracts1,539 1,358 181 — —Purchase order commitments8,119 5,619 1,000 1,000 500 $100,266 $13,476 $57,634 $10,879 $18,277F-24Table of ContentsLegal ProceedingsIn August 2017, Martin Shkreli, the Company’s former Chief Executive Officer, was convicted on securities fraud charges following investigations by the U.S. Attorney for theEastern District of New York and the U.S Securities and Exchange Commission. The Company was not a target of these investigations and cooperated with them fully. Inconnection with these proceedings, Mr. Shkreli sought advancement of his legal fees from the Company. The Company disputed its obligation to pay these amounts in full, and inNovember 2016, the Company and Mr. Shkreli entered into a binding settlement arrangement under which the Company advanced $2.8 million in legal fees to Mr. Shkreli’scounsel. The Company also advanced an additional $2 million in legal fees once the matter proceeded to trial. In December 2017, after Mr. Shkreli requested that the Companyadvance him legal fees in connection with his appeal of his conviction, the Company and Mr. Shkreli amended the November 2016 settlement arrangement, pursuant to which theCompany agreed to advance Mr. Shkreli $625,000 in full satisfaction of its obligation to advance fees to Mr. Shkreli in connection with the appeal. The Company has beenreimbursed by its directors’ and officers’ insurance carriers for $3.3 million of the legal fees the Company advanced in connection with the pre-trial and trial proceedings. Pendingthe outcome of Mr. Shkreli's appeal, the insurance carriers have reserved their rights to assert that certain of the advanced funds pertain to claims excluded from coverage underthe relevant insurance policy and are therefore recoverable by the carriers. As a result, the final amount of the reimbursement from the insurance carriers is not currently estimable.In addition, a portion of the legal fees the Company has advanced to Mr. Shkreli will be subject to reimbursement by Mr. Shkreli under Delaware law in the event it is ultimatelydetermined that Mr. Shkreli is not entitled to be indemnified by the Company in these proceedings.In August 2015, the Company filed a lawsuit in federal district court for the Southern District of New York against Mr. Shkreli, asserting that he breached his fiduciary duty of loyaltyduring his tenure as the Company’s Chief Executive Officer and a member of its Board of Directors. Mr. Shkreli served a demand for JAMS arbitration on Retrophin, claiming thatRetrophin had breached his December 2013 employment agreement. In response to Mr. Shkreli’s arbitration demand, the Company asserted counterclaims in the arbitration thatare substantially similar to the claims it previously asserted in the federal lawsuit against Mr. Shkreli. The federal Court granted a stay of the federal lawsuit pending a determinationby the arbitration panel whether the Company’s counterclaims would be litigated in the arbitration, as the Company is seeking. In April 2016, the arbitration panel granted theparties’ request for a stay of the proceedings pending settlement discussions. In connection with these proceedings, Mr. Shkreli sought advancement of his legal fees from theCompany relating to his defense of the Company’s claims against him. Pursuant to the November 2016 binding term sheet, the significant majority of the existing legal fees relatedto these proceedings that Mr. Shkreli claimed should be advanced were offset and satisfied by a $2.025 million judgment against Mr. Shkreli in a different case, and the Companypaid$0.4 million in legal fees to Mr. Shkreli's counsel. The legal fees the Company has advanced will be subject to reimbursement by Mr. Shkreli under Delaware law in the event itis ultimately determined that Mr. Shkreli is not entitled to be indemnified by the Company in these proceedings. The Company will also be subject to additional obligations when thelitigation resumes, as well as advancement obligations in the interim.For the years ended December 31, 2017 and 2016, the Company recorded $2.6 million and $5.2 million in expenses and paid $3.6 million and $1.0 million under the settlement,respectively. The Company received $2.6 million and $0.7 million in reimbursement from its directors’ and officers’ insurance carriers during the year ended December 31, 2017 and2016, respectively. The reimbursement in 2017 is recorded as a liability on the Consolidated Balance Sheet pending the outcome of an appeal, if any.From time to time the Company is involved in legal proceedings arising in the ordinary course of business. The Company believes there is no litigation pending that could have,individually or in the aggregate, a material adverse effect on its results of operations or financial condition.NOTE 11. STOCKHOLDERS’ EQUITY / DEFICITCommon StockThe Company is currently authorized to issue up to 100,000,000 shares of $0.0001 par value common stock. All issued shares of common stock are entitled to vote on a 1 share/1vote basis.Preferred Stock The Company is currently authorized to issue up to 20,000,000 shares of $0.001 par value preferred stock, of which 1,000 shares are designated Class "A" Preferred shares,$0.001 par value. Class A Preferred Shares are not entitled to interest, have certain liquidation preferences, special voting rights and other provisions. No preferred stock has beenissued to date.Public Offering - 2015On March 24, 2015, the Company completed a public offering of 7,866,000 shares of common stock at a price of $19.00 per share. The Company received net proceeds from theoffering of $140.0 million after deducting underwriting fees and other offering costs of $9.5 million. The shares of common stock were offered by the Company pursuant to a shelfregistration statement that was declared effective by the SEC on March 13, 2015.2015 Equity Incentive PlanOn June 8, 2015, the Company's stockholders approved the 2015 Equity Incentive Plan (the "2015 Plan"). The 2015 Plan is intended as the successor to and continuation of thePlan. Stockholders approved 1.4 million new shares to be issued under the 2015 Plan, in addition to 0.6 million unallocated shares remaining available for issuance under the Planthat were added to the 2015 Plan.On May 18, 2016, the Company's stockholders approved an amendment to the 2015 Equity Incentive Plan (the "Amended 2015 Plan"). The amendment provides for an additional1.6 million new shares to be issued under the Amended 2015 Plan, in addition to 0.7 million unallocatedF-25Table of Contentsshares remaining available for issuance. The amendment also includes a provision where on or after March 21, 2016, the number of shares available for issuance under theAmended 2015 Plan will be reduced by one share for each share subject to a stock option or stock appreciation right and by 2.0 shares for each share subject to any other type ofstock award issued pursuant to the Amended 2015 Plan, and any such shares will return to the share reserve at the same rates upon cancellation or other forfeiture of such awardsor shares.On May 17, 2017, the Company's stockholders approved an amendment to the Amended 2015 Plan. The amendment provides for an additional 1.8 million new shares to be issuedunder the Amended 2015 Plan.2017 Employee Stock Purchase PlanThere are 380,000 shares of common stock available for issuance under the 2017 Employee Stock Purchase Plan ("2017 ESPP"). Beginning on January 1, 2018, and ending on(and including) January 1, 2026, the number of shares of common stock available for issuance under the 2017 ESPP shall increase by an amount equal to the lesser of (i) onepercent (1%) of the total number of shares of common stock outstanding on December 31st of the preceding calendar year and (ii) 300,000 shares of common stock.Substantially all employees are eligible to participate and, through payroll deductions, can purchase shares on established dates semi-annually. The purchase price per share soldpursuant to the 2017 ESPP will be the lower of (i) 85% of the fair market value of common stock on the first day of the offering period or (ii) 85% of the fair market value on thepurchase date. Each offering period will span up to six months. Purchases may be up to 15% of qualified compensation, with an annual limit of $25,000. The 2017 ESPP is intendedto qualify as an “employee stock purchase plan” under Section 423 of the Internal Revenue Code.As of December 31, 2017, there were approximately 0.4 million shares authorized and 0.3 million shares reserved for future issuance under the 2017 ESPP.Stock OptionsThe fair values of stock option grants during the year ended December 31, 2017, 2016 and 2015 were calculated on the date of grant using the Black-Scholes option pricing model,except for options granted for market and revenue performance criteria. Compensation expense is recognized over the period of service, generally the vesting period. During theyear ended December 31, 2017, 2,111,300 stock options were granted by the Company. The following weighted average assumptions were used in the Black-Scholes optionspricing model to estimate the fair value of stock options for the specified reporting periods: Twelve Months Ended December 31, 2017 2016 2015Risk free rate2.10% 1.20% 1.53%Expected volatility70% 68% 83%Expected life (in years)6.1 5.8 5.8Expected dividend yield— — —The risk-free interest rate was based on rates established by the Federal Reserve. The Company’s expected volatility was based on analysis of the Company’s volatility, as well asthe volatilities of guideline companies. The expected life of the Company’s options was determined using the simplified method as a result of limited historical data regarding theCompany’s activity. The dividend yield is based upon the fact that the Company has not historically paid dividends, and does not expect to pay dividends in the foreseeable future.The following table summarizes our stock option activity and related information for the year ended December 31, 2017: Weighted Average Shares UnderlyingOptions ExercisePrice RemainingContractualTerm (in years) AggregateIntrinsic Value(in thousands)Exercisable at December 31, 20163,793,017 $14.94 6.82 $23,358Outstanding at December 31, 20166,430,570 16.91 7.64 $30,088Granted2,111,300 18.48 — —Forfeited and expired(759,127) 22.28 — —Exercised(629,075) 12.86 — 5,420Outstanding at December 31, 20177,153,668 $17.16 6.95 $39,010Exercisable at December 31, 20174,610,233 $15.97 5.85 $31,991F-26Table of ContentsThe following table summarizes our stock option activity and related information for the year ended December 31, 2016: Weighted Average Shares UnderlyingOptions ExercisePrice RemainingContractualTerm (in years) AggregateIntrinsic Value(in thousands)Exercisable at December 31, 20152,036,906 $12.55 8.34 $15,582Outstanding at December 31, 20155,665,584 $17.05 8.75 $31,542Granted1,687,250 16.73 — —Forfeited and expired(541,416) 22.19 — —Exercised(380,848) 10.55 — 2,873Outstanding at December 31, 20166,430,570 $16.91 7.64 $30,088Exercisable at December 31, 20163,793,017 $14.94 6.82 $23,358The following table summarizes our stock option activity and related information for the year ended December 31, 2015: Weighted Average Shares UnderlyingOptions ExercisePrice RemainingContractualTerm (in years) AggregateIntrinsic Value(in thousands)Exercisable at December 31, 20141,225,833 $9.73 7.96 $3,395Outstanding at December 31, 20144,892,208 $10.93 8.57 $8,353Granted2,285,000 27.15 — —Forfeited and expired(970,170) 14.91 — —Exercised(541,454) 13.10 — 7,230Outstanding at December 31, 20155,665,584 $17.05 8.75 $31,542Exercisable at December 31, 20152,036,906 $12.55 8.34 $15,582The weighted average grant date fair value of options granted was $11.77, $10.09, and $19.02 during the years ended December 31, 2017, 2016 and 2015, respectively. Theaggregate intrinsic value for outstanding options is calculated as the difference between the exercise price of the underlying awards and the closing price of the Company’s commonstock as of December 31, 2017 of $21.07. Unrecognized compensation cost associated with unvested stock options amounts to $27.9 million as of December 31, 2017, which willbe expensed over a weighted average remaining vesting period of 2.6 years.Restricted Stock UnitsAs of December 31, 2017, there was approximately $2.3 million of unrecognized compensation cost related to restricted stock units ("RSUs") granted. This amount is expected tobe recognized over a weighted average period of 1.6 years.The following table summarizes our restricted stock unit activity for the year ended December 31, 2017 and 2016: Number ofRSUs Weighted AverageGrant Date Fair ValueUnvested December 31, 2015429,666 $20.38Granted245,000 17.52Vested(161,335) 16.76Forfeited/cancelled(105,585) 21.19Unvested December 31, 2016407,746 19.88Granted157,750 18.32Vested(190,498) 17.12Forfeited/cancelled(29,666) 22.00Unvested December 31, 2017345,332 $20.51F-27Table of ContentsShare Based CompensationTotal non-cash stock-based compensation expense consisted of the following for the years ended December 31, 2017, 2016 and 2015 (in thousands): Twelve Months Ended December 31, 2017 2016 2015Selling, general and administrative expenses$17,924 $18,614 $16,483Research and development expenses8,950 10,488 9,417Total$26,874 $29,102 $25,900Exercise of WarrantsDuring the twelve months ended December 31, 2017, the Company issued 607,481 shares of common stock upon the exercise of warrants for cash received by the Company inthe amount of $3.6 million. The Company reclassified $11.2 million derivative liability as equity for the value of these warrants on the date of exercise. The warrants were revaluedimmediately prior to exercise and the change in the fair value of $3.0 million was recorded as other expense in the Consolidated Financial Statements of the Company.During the twelve months ended December 31, 2016, the Company issued 898,633 shares of common stock upon the exercise of warrants for cash received by the Company inthe amount of $6.0 million. The Company reclassified $14.7 million derivative liability as equity for the value of these warrants on the date of exercise. The warrants were revaluedimmediately prior to exercise and the change in the fair value of $2.9 million was recorded as other expense in the Consolidated Financial Statements of the Company.During the twelve months ended December 31, 2015, the Company issued 870,306 shares of common stock upon the exercise of warrants for cash received by the Company inthe amount of $4.5 million. The Company reclassified $23.5 million derivative liability as equity for the value of these warrants on the date of exercise. The warrants were revaluedimmediately prior to exercise and the change in the fair value of $2.8 million was recorded as other expense in the Consolidated Financial Statements of the Company.Treasury StockIn March 2015 the Company retired 379,591 shares of its common stock held as treasury stock that were purchased in 2013 and 2014 with an aggregate purchase price of $3.2million. This was the entire holding of treasury stock.No shares were repurchased during the years ended December 31, 2017 and 2016.NOTE 12. EARNINGS (LOSS) PER SHAREBasic earnings (loss) per share (“EPS”) represents net income (loss) attributable to common shareholders divided by the weighted average number of common shares outstandingduring the measurement period. Diluted EPS represents net income attributable to common shareholders divided by the weighted average number of common shares outstandingduring the measurement period while also giving effect to all potentially dilutive common shares that were outstanding during the period using the treasury stock method. Basic and diluted EPS is calculated as follows (net income amounts are stated in thousands): For the year ended December 31, 2017 2016 2015 Shares Net loss EPS Shares Net loss EPS Shares Net Income EPSBasic Earnings per Share38,769,816 $(59,731) $(1.54) 36,997,865 $(47,903) $(1.29) 33,560,249 $117,237 $3.49Dilutive shares related to warrants— — 1,290,147 — — — Change in fair value of derivative instruments— — — (1,655) — — Convertible Debt— — — — 2,642,160 1,881 Restricted Stock— — — — 290,966 — Stock Options— — — — 1,088,064 — Dilutive Earnings per Share38,769,816 $(59,731) $(1.54) 38,288,012 $(49,558) $(1.29) 37,581,439 $119,118 $3.17F-28Table of ContentsFor the years ended December 31, 2017, 2016 and 2015, the following shares were excluded because they were anti-dilutive: For the year ended December 31, 2017 2016 2015Convertible Debt2,642,160 2,642,160 —Restricted Stock157,319 444,942 22,069Options7,080,998 6,286,584 1,049,375Warrants1,159,424 — 2,665,548Total Anti-Dilutive Shares11,039,901 9,373,686 3,736,992NOTE 13. INCOME TAXESFor financial reporting purposes, net income (loss) before income taxes includes the following components (in thousands): Year Ended December 31, 2017 2016 2015United States$(55,611) $(52,750) $107,038Foreign(2,752) (4,832) (1,571)Total$(58,363) $(57,582) $105,467The components of the provision (benefit) for income taxes, in the Consolidated Statement of Operations are as follows (in thousands): 2017 2016 2015Current Federal$6,991 $13,137 $2,094State802 (155) 1,709 7,793 12,982 3,803Deferred Federal(7,965) (18,814) (8,296)State1,540 (3,847) (7,277) (6,425) (22,661) (15,573)Total tax provision (benefit)$1,368 $(9,679) $(11,770)The following is a reconciliation of the statutory federal income tax rate to the Company’s effective tax rate expressed as a percentage of income (loss) before income taxes: 2017 2016 2015Statutory rate - federal(35.00)% (35.00)% 35.00 %State taxes, net of federal benefit(3.30)% (3.16)% 1.53 %Change in FV of derivative liability (warrants)2.82 % 1.10 % 10.89 %Change in federal tax rate23.29 % — % — %Bargain purchase gain— % — % (16.04)%Other permanent differences1.04 % 2.05 % 3.68 %Tax credits(5.79)% (1.58)% (7.85)%Return to provision adjustments and other true-ups(3.48)% (1.15)% (10.40)%Other1.25 % 3.09 % (0.79)%Change in valuation allowance21.62 % 16.30 % (27.02)%Income tax provision (benefit)2.45 % (18.35)% (11.00)%F-29Table of ContentsThe significant components of the Company’s deferred tax assets and liabilities as of December 31, 2017 and 2016 are as follows (in thousands): 2017 2016Deferred Tax Assets: Net operating loss$1,099 $1,832Research and development and other tax credits1,599 60Contingent consideration23,080 32,792Other accrued expenses2,603 4,621Stock based compensation15,695 18,520Other358 30 44,434 57,855Deferred Tax Liabilities: Intangible assets(16,810) (34,153)Deferred gain on installment sale— (14,547)Tax basis depreciation less than book depreciation— — (16,810) (48,700) Net deferred tax assets (liabilities) before valuation allowance27,624 9,155Valuation allowance(27,624) (15,580)Total deferred tax liability$— $(6,425)The Company has established a full valuation allowance against its U.S. federal and state deferred tax assets due to the uncertainty surrounding the realization of such assets infuture periods. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which temporary differences becomedeductible. Management considers the scheduled reversal of deferred liabilities and tax planning strategies in making this assessment and evaluates the recoverability of thedeferred tax assets as of each reporting date. At such time as it is determined that it is more likely than not that deferred assets are realizable, the valuation allowance will bereduced accordingly and recorded as a tax benefit.The Company has recorded a valuation allowance of $27.6 million as of December 31, 2017 to reflect the estimated amount of deferred tax assets that may not be realized. TheCompany increased its valuation allowance by $12.0 million for the year ended December 31, 2017 largely as a result of the Tax Cuts and Jobs Act ("Tax Act"), which impacted ourability to utilize certain deferred tax assets in the future.At December 31, 2017, the Company had available unused U.S. federal net operating loss (“NOL”) carryforwards of $5.2 million and a minimal amount of state NOL carryforwards,all of which are fully offset by a valuation allowance. The U.S. federal NOL carryforwards will expire beginning in 2030. In addition, at December 31, 2017, the Company had federalorphan drug tax credit carryforwards of $0.02 million that begin to expire in 2037 unless utilized and California Competes tax credit carryforwards of $2.0 million that begin to expirein 2022. The Company has international subsidiaries whose operations are not material for the year ended December 31, 2017.The Company accounts for uncertain tax benefits in accordance with the provisions of ASC 740-10 of the Accounting for Uncertainty in Income Taxes. As of December 31, 2017the Company had no unrecognized tax benefits.The Company does not anticipate that the amount of unrecognized tax benefits as of December 31, 2017 will change materially within the following 12 months.A reconciliation of the Company's unrecognized tax benefits for the years 2017 and 2016 is provided in the following table (in thousands): 2017 2016Balance as of January 1:$1,500 $3,324Increase in current period positions— —Decrease in prior period positions(1,500) (1,824)Increase in prior period positions— —Balance as of December 31:$— $1,500The Company files income tax returns in the U.S. federal jurisdiction, various state and local, and foreign jurisdictions. The Company’s income tax returns are open to examinationby federal, state and foreign tax authorities, generally for the years ended December 31, 2015 and later.The Company’s policy is to record estimated interest and penalties related to the underpayment of income taxes or unrecognized tax benefits as a component of its income taxprovision. During the years ended 2017, 2016 and 2015 , the Company did not recognize any interest or penalties in its Consolidated Statements of Operations and ComprehensiveIncome (Loss) and there were no accruals recorded for interest or penalties at December 31, 2017 and 2016.F-30Table of ContentsU.S. Tax ReformThe Tax Act was enacted on December 22, 2017. The Tax Act reduces the US federal corporate tax rate from 35% to 21%, as well as making several other significant changes tothe tax law, effective January 1, 2018. Pursuant to the Securities and Exchange Commission Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cutsand Jobs Act (SAB 118), given the amount and complexity of the changes in tax law resulting from the Tax Legislation, the Company has not finalized the accounting for the incometax effects of the Tax Legislation. This includes the provisional amounts recorded related to the re-measurement of the deferred taxes and the change to our valuation allowance.The impact of the Tax Legislation may differ from this estimate, during the one-year measurement period due to, among other things, further refinement of the Company'scalculation, changes in interpretations and assumptions the Company has made, guidance that may be issued and actions the Company may take as a result of the Tax Legislation.The Company's accounting for the following elements of the Tax Act is incomplete. However, the Company was able to make reasonable estimates of certain effects and therefore,has recorded provisional amounts as follows:Revaluation of deferred tax assets and liabilitiesWe have remeasured our deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future, which is generally 21% plus state and local tax.The Company recorded a provisional decrease related to our deferred tax assets and liabilities of $13.0 million as a result of the tax rate decrease, with a corresponding adjustmentto our valuation allowance for the year ended December 31, 2017.Valuation allowancesThe Company must assess whether its valuation allowance analyses for deferred tax assets are affected by various aspects of the Tax Act (e.g., deemed repatriation of deferredforeign income, future GILTI inclusions, new categories of foreign tax credits). Since, as discussed herein, the Company has recorded provisional amounts related to certainportions of the Tax Act, any corresponding determination of the need for or change in a valuation allowance is also provisional. The Company increased its valuation allowance by$12.0 million as a result of the Tax Act and its effects on the realizability of our deferred tax assets.NOTE 14. RETIREMENT PLANThe Company has a 401(k) defined contribution savings plan for the benefit of all eligible employees. Employer matching contributions were $0.6 million and $0.5 million for theyears ended December 31, 2017 and 2016, respectively. There were no employer contributions for the year ended December 31, 2015.NOTE 15. SEGMENT INFORMATIONThe Company operates in one business segment, which primarily focuses on the development and commercialization of innovative therapies for people with serious and lifethreatening rare diseases and medical conditions. All products are included in one segment because the majority of the Company’s products have similar economic and othercharacteristics, including the nature of the products, type of customers, distribution methods and regulatory environment. Twelve months ended December 31, 2017 2016 2015Net product revenues by product: Thiola$82,311 $71,199 $54,923Bile acid products (1)72,626 62,392 44,969Total net product revenues$154,937 $133,591 $99,892(1) 2015 sales of Vecamyl (divested in 2015) are immaterial and included in Bile acid productsNOTE 16. RESTRUCTURINGOn March 7, 2017, the Company initiated a plan to consolidate its operations to its corporate headquarters in San Diego, CA. The Company incurred $3.6 million in employeerelated separation and transitional cash charges as a result of this consolidation.F-31Table of ContentsThe following table presents a reconciliation of the restructuring liability recorded within accrued expenses on the Company's Condensed Consolidated Balance Sheets (inthousands): Twelve Months Ended December 31,2017Liability, beginning of period$893Restructuring expenses3,608Cash settlements(897)Adjustments to previous estimates(55)Liability, end of period$3,549All accrued restructuring amounts were paid as of January 31, 2018 with the exception of accrued medical benefits of $0.3 million.NOTE 17. PROPERTY AND EQUIPMENTProperty, plant and equipment, net consisted of the following (in thousands): December 31, 2017 2016Computers and equipment$436 $311Furniture and fixtures945 1,573Leasehold improvements2,071 903Construction-in-progress363 — 3,815 2,787Less: Accumulated depreciation(585) (200)Total property and equipment, net$3,230 $2,587The construction-in-process balance consists of costs related to the Company’s leasehold improvements at its facilities in San Diego, California.Depreciation expense for the years ended December 31, 2017, 2016 and 2015 was $0.5 million, $0.1 million and $0.1 million, respectively.The Company has not capitalized interest related to the property and equipment purchases.NOTE 18. SUBSQUENT EVENTSOn December 16, 2017, the Company entered into a Future Acquisition Right and Joint Development Agreement (the “Option Agreement”) with Censa Pharmaceuticals Inc.(“Censa”), which by its terms became effective on January 4, 2018 upon the satisfaction of certain conditions set forth therein. Pursuant to the Option Agreement, the Company hasagreed to fund certain development activities of Censa’s CNSA-001 program, in an aggregate amount expected to be approximately$16 million through proof of concept, and hasthe right, but not the obligation, to acquire Censa (the “Option”) on the terms and subject to the conditions set forth in a separate Agreement and Plan of Merger (the “MergerAgreement”). In exchange for the Option, on January 8, 2018, the Company paid Censa $10 million, $9 million of which was distributed to Censa’s equity holders, and is required topay Censa an additional $5 million upon Censa’s completion of a specified development milestone set forth in the Option Agreement, all of which will be distributed to Censa’s equityholders.If the Company exercises the Option, pursuant to the terms of the Merger Agreement the Company will acquire Censa for $65 million in upfront consideration, subject to certainadjustments, paid as a combination of 20% in cash and 80% in shares of the Company’s common stock, valued at a fixed price of $21.40 per share; provided, however, that Censamay elect on behalf of its equityholders to receive the upfront consideration in 100% cash if the average price per share of the Company’s common stock for the ten trading daysending on the date the Company provides a notice of interest to exercise the Option is less than $19.26. In addition to the upfront consideration, if the Company exercises theOption and acquires Censa, the Company would be required to make further cash payments to Censa’s equityholders of up to an aggregate of $25 million if the CNSA-001program achieves specified development and commercial milestones.F-32Table of ContentsNOTE 19. QUARTERLY FINANCIAL INFORMATION (UNAUDITED)The following table presents selected consolidated statements of operations data for each quarter for the fiscal years ended December 31, 2017, 2016 and 2015 (unaudited, inthousands, except for per share data): FourthQuarter ThirdQuarter Second Quarter FirstQuarter For the year ended December 31, 2017: Net product sales$42,177 $40,340 $38,800 $33,620Total operating expenses57,354 50,948 52,398 48,028Operating loss(15,177) (10,608) (13,598) (14,408)Total other income (expense), net14,139 (8,409) (1,556) 1,254Loss before provision for income taxes(11,038) (19,017) (15,154) (13,154)Income tax benefit (provision)(6,580) 1,223 1,925 2,064Net income (loss)$(17,618) $(17,794) $(13,229) $(11,090)Net Loss per common share Basic$(0.45) $(0.46) $(0.34) $(0.29)Diluted$(0.55) $(0.46) $(0.34) $(0.32)For the year ended December 31, 2016: Net product sales$37,327 $33,945 $33,311 $29,008Total operating expenses55,549 54,317 44,690 37,249Operating loss(18,222) (20,372) (11,379) (8,241)Total other income (expense), net1(5,935) 10,274 9,416 (14,387)Income (loss) before provision for income taxes(12,287) (30,646) (20,795) 6,146Income tax benefit (provision)3,684 (6,467) 7,392 5,070Net income (loss)$(8,603) $(37,113) $(13,403) $11,216Net income (loss) per common share Basic$(0.23) $(1.00) $(0.37) $0.31Diluted$(0.39) $(1.00) $(0.37) $(0.08)1The Company has experienced large changes in its stock price which directly effects the fair value of derivative instruments issued by the Company. These changes in fair value are charged to otherincome (expense) which correspondingly incurs larges variance from period to period. See Note 5 and 6 to the Consolidated Financial Statements for further discussion.F-33Exhibit 10.24***Text Omitted and Filed SeparatelyWith Securities and Exchange CommissionConfidential Treatment RequestedUnder 17 C.F.R. Sections 200.80(b)(4) and 240.24b-2 of theSecurities Exchange Act of 1934, as amendedAMENDMENT TWO TO THE THIRD AMENDMENT TO TRADEMARK LICENSE AND SUPPLY AGREEMENTThis Amendment Two to the Third Amendment to Trademark License and Supply Agreement dated November 3, 2017 (this “Amendment” and the “Effective Date”)amends the Third Amendment dated March 17, 2016 (as amended effective September 12, 2016 by the First Amendment to the Third Amendment, the “Third Amendment”) to theTrademark License and Supply Agreement by and between Mission Pharmacal Company (“Mission”) and Retrophin, Inc. (together with its affiliates, “Retrophin”) dated May 28,2014 (“Agreement Effective Date”) (as amended by the amendments dated July 28, 2014 and September 30, 2015 and by the Third Amendment, the “Agreement”).WHEREAS, Mission and Retrophin have mutually agreed to amend the Budget for the Development Project, extend the Term, and provide for certain details related to filing andprosecuting a patent application related to [...***...] formulation of Thiola arising from the Development Project. The amendments section of this Amendment set forth below inSection 1.0 shall amend and restate and replace in its entirety Sections in the Third Amendment and Agreement, or add new Sections to them, as of the Effective Date, as indicatedbelow. The below noted sections shall be incorporated into the Agreement as binding Sections of the Agreement on the Parties.NOW THEREFORE, for good and valuable consideration, the receipt and adequacy of which is hereby acknowledged, it is agreed that the Agreement shall be amended as follows:1.0Amendments(a)Exhibit B attached hereto will replace Exhibit B to the Third Amendment.(b)Amend and replace Section 2.0(b) of the Third Amendment, which amended Section 10.0 of the Agreement with the following:“(b) Amended Section 10.0.10.0 Term. This Agreement shall be effective as of the Effective Date and, subject to earlier termination as set forth in Section 18.0 or 21.0, shall continue untilthe later of (1) [...***...] ([...***...]) years and (ii) [...***...] (the “Initial Term”). This Agreement shall automatically renew thereafter for periods of [...***...] ([...***...])[...***...] (each, a “Renewal Term”).”(c)Insert new Section 2.0(e) of the Third Amendment, as follows:“(e) A new definition of “Product” shall be inserted in alphabetical order in Section 2.0 of the Agreement as follows: “Product” shall mean all pharmaceuticalcompositions containing tiopronin, including all dosages and formulations of tiopronin.”(d)Amend and replace Section 2.0(d) of the Third Amendment, which amended Exhibit B of the Agreement, with the following:“(d) Amended Exhibit B:Without limiting the generality of the “Product” definition in the body of the Agreement, “Product will include all dosages and formulations of tiopronin.”(e)Amend Article 1.0 of the Third Amendment to add a Section 1.7 as follows:“1.7 Patents to the Results of the Development Project. The Parties have agreed for Mission through its outside counsel, [...***...] (“Counsel”), to prepare and file a United Statespatent application and PCT filing thereof directed to certain Project Know-How regarding [...***...] formulation of tiopronin (the “Application”) and have agreed to the following inrelation to the Application and any resulting Licensed Patents:i.Retrophin shall bear the costs of such preparation and filing for such preparation and filing.ii.Retrophin shall bear the costs of further prosecution of the Application, pursuant to written budgets mutually agreed upon in writing by the Parties on an annual basis afterthe initial filing of the Application.iii.Retrophin shall have the right to review, comment upon, and approve the Application prior to its being filed. The Parties shall reasonably cooperate with each other withrespect to the preparation and filing of the Application.iv.Retrophin shall have the right to review, comment upon, and approve of all filings and submissions related to the prosecution of the Application. Mission shall instructCounsel to copy Retrophin on all correspondence related to the Application, including without limitation office actions and proposed responses thereto. The Parties shallreasonably cooperate with respect to prosecution of the Application.v.Notwithstanding Section 1.1 of this Third Amendment, Project Know-How as used in this Section is defined as follows: “Project Know-How” shall mean all inventions, data,information, formulations, and trade secrets arising from, or invented or created pursuant to, the Development Project.1vi.Intellectual property in the Project Know-How, including patent applications and patents directed to the same, shall be defined as “Project IP,” and shall be owned byMission, subject to the licenses to Retrophin provided for in the Second Amendment to the Third Amendment (i.e., this amendment).vii.“Licensed Patents” shall mean (a) the Application; (b) all patent applications having at least one claim covering a Product or claiming priority to or common priority with theApplication (including all such PCT and foreign applications), and all divisionals, continuations, continuations-in-part, and substitutions of any of the foregoing; (c) allpatents issuing on any of the foregoing, together with all re-examinations, re-issues, and extensions thereof; and (d) all counterparts to any of the foregoing outside theU.S.viii.Mission hereby grants to Retrophin an exclusive (even as to Mission) fully paid, irrevocable, perpetual patent license to market, sell and commercialize Productsmanufactured by Mission as long as Retrophin continues to be a party to the current Trademark License and Supply Agreement between the Parties, such license to besublicensable to any wholly-owned subsidiary or parent entity of Retrophin.ix.Retrophin shall have the right to enforce the Licensed Patents against infringement and alleged infringement involving any Product(s), retaining all recoveries. The Partiesagree to cooperate in any such enforcement, at Retrophin’s expense (on a pass-through basis with no markup), including being named as party-plaintiff if needed forstanding or other legal purpose.x.On or after the filing date of the Application, Mission may elect to file a derivative patent application (the “Derivative Application”) that includes Project Know-How, providedthat such Derivative Application shall not, at any time, contain a claim covering a Product. Any Derivative Application, and any patent issuing therefrom, that includes at anytime a claim covering a Product shall immediately become and thereafter remain a Licensed Patent to which Retrophin receives an exclusive license in accordance withSection 1.7(viii) above.”(f)Add a new Section 2.0(f) of the Third Amendment as follows:“(f) Amend and replace Section 12.0 of the Agreement ([...***...]) with the following:“[...***...].”(g)Add a new Section 2.0(g) of the Third Amendment as follows:“Exhibit E: Master Services Agreement is hereby removed as an exhibit to this Agreement.”(h)Amend Retrophin’s address in Section 25.3 of the Agreement as follows:“If to Retrophin, Inc.3721 Valley Centre Drive, Suite 200San Diego, CA 92130Attn: Legal Department Email: Legal@Retrophin.comFax: 858-792-0431”2.0 Except as set forth above, the Third Amendment and the Agreement shall remain in full force and effect.3.0 All noted Amendments to the Agreement, and to such Amendments, including this Amendment, and the Agreement, together constitute the entire agreement of the partieshereto with respect to the topics addressed therein and supersedes any and all prior agreements, whether oral or in writing between the parties hereto with respect to subjectmatter hereof. This Amendment may not be amended, modified or supplemented except by written agreement of the parties hereto. This Amendment may be executed in one ormore counterparts, each of which shall be deemed and original, but all of which together shall constitute one and the same instrument.IN WITNESS HEREOF, the undersigned have executed this Amendment on the day and year first above written.[SIGNATURE PAGE FOLLOWS]2RETROPHIN, INC. MISSION PHARMACAL COMPANYBy: /s/ Laura Clague By: /s/ Max Martin Name: Laura Clague Name: Max MartinTitle: Chief Financial Officer Title: Chief Operating Officer3Exhibit B - Budget and Anticipated TimelineExhibit BRevisedRemainder 2017 asof [...***...]RevisedCalender 2018as of [...***...]Revised 2019 asof [...***...]Revised BudgetTotalManufacturing [...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...]Subtotal[...***...][...***...][...***...][...***...]Regulatory & Development Strategy[...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...]CMC Support [...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...]Clinical Program [...***...][...***...][...***...][...***...][...***...]NDA Preparation Modules 1, 2, & 3 and Remaining NDA sections[...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...]...***...[...***...][...***...][...***...][...***...]...***...[...***...][...***...][...***...][...***...]...***...[...***...][...***...][...***...][...***...]Third Party Pass-Through Costs ([...***...]) [...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...]4[***Confidential Treatment Requested...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...]Study Set up and Monitoring, Analysis and report [...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...]Other Pass-Through costs[...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...]Subtotal[...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...][...***...]Subtotal[...***...][...***...][...***...][...***...]PROJECT Total[...***...][...***...][...***...][...***...] 5EXExhibit 21.1RETROPHIN, INC.LIST OF SUBSIDIARIESNo. Name1 Retrophin Pharmaceutical, Inc.2 Retrophin Therapeutics I, Inc.3 Retrophin Therapeutics II, Inc.4 Retrophin Europe Ltd5 Retrophin International Holdings Ltd6 RTRX International CV7 Retrophin Therapeutics International LLC8 US LLC 29 Retrophin Research Ltd10 Retrophin US Holdings LLC11 Manchester Pharmaceuticals LLCExhibit 23.1Consent of Independent Registered Public Accounting FirmRetrophin, Inc.San Diego, CaliforniaWe hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (Nos. 333-202861, 333-198648 and 333-198648) and Form S-8 (Nos. 333-218582, 333-213599, 333-206510 and 333-200224) of Retrophin, Inc. of our reports dated February 27, 2018, relating to the consolidated financial statements and theeffectiveness of Retrophin, Inc.’s internal control over financial reporting, which appear in this Form 10-K./s/ BDO USA, LLPNew York, New YorkFebruary 27, 2018Exhibit 31.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICERPURSUANT TO EXCHANGE ACT RULE 13a-14(a) OR 15d-14(a) I, Stephen Aselage, certify that:1.I have reviewed this Annual Report on Form 10-K of Retrophin, Inc.;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 statements made, in light ofthe 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 financial condition, results ofoperations and cash flows of the registrant as of, and for, the periods presented in this report;4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that materialinformation relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in whichthis 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 providereasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generallyaccepted accounting principles;(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of thedisclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (theregistrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal controlover financial reporting; and5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors andthe audit committee of the registrant’s board of directors (or persons performing the equivalent functions):(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affectthe registrant’s ability to record, process, summarize and report financial information; and(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financialreporting.Date: February 27, 2018/s/ Stephen Aselage Stephen Aselage Chief Executive Officer (Principal Executive Officer)Exhibit 31.2 CERTIFICATION OFCHIEF FINANCIAL OFFICERPURSUANT TO EXCHANGE ACT RULE 13a-14(a) OR 15d-14(a) I, Laura Clague, certify that:1.I have reviewed this Annual Report on Form 10-K of Retrophin, Inc.;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 statements made, in light ofthe 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 financial condition, results ofoperations and cash flows of the registrant as of, and for, the periods presented in this report;4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that materialinformation relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in whichthis 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 providereasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generallyaccepted accounting principles;(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of thedisclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (theregistrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal controlover financial reporting; and5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors andthe audit committee of the registrant’s board of directors (or persons performing the equivalent functions):(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affectthe registrant’s ability to record, process, summarize and report financial information; and(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financialreporting.Date: February 27, 2018/s/ Laura Clague Laura Clague Chief Financial Officer (Principal Financial Officer) Exhibit 32.1 CERTIFICATION OFCHIEF EXECUTIVE OFFICERPURSUANT TO 18 U.S.C. SECTION 1350AS ADOPTED PURSUANT TOSECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Annual Report on Form 10-K of Retrophin, Inc. (the “Company”), for the period ended December 31, 2014 (the “Report”), the undersignedofficer of the Company hereby certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to such officer’sknowledge:1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and2.The information contained in the Report, fairly presents, in all material respects, the financial condition and results of operations of the Company.Date: February 27, 2018/s/ Stephen Aselage Stephen Aselage Chief Executive Officer (Principal Executive Officer)Exhibit 32.2 CERTIFICATION OFCHIEF FINANCIAL OFFICERPURSUANT TO 18 U.S.C. SECTION 1350AS ADOPTED PURSUANT TOSECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Annual Report on Form 10-K of Retrophin, Inc. (the “Company”), for the period ended December 31, 2014 (the “Report”), the undersignedofficer of the Company hereby certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to such officer’sknowledge:1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and2.The information contained in the Report, fairly presents, in all material respects, the financial condition and results of operations of the Company.Date: February 27, 2018/s/ Laura Clague Laura Clague Chief Financial Officer (Principal Financial Officer)

Continue reading text version or see original annual report in PDF format above