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☒
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ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
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☐
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TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
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Delaware
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26-1622110
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(State or Other Jurisdiction of Incorporation or Organization)
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(I.R.S. Employer Identification No.)
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480 Arsenal Way
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Watertown, MA
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02472
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(Address Of Principal Executive Offices)
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(Zip Code)
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Title of each class
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Name of each exchange on which registered
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Common Stock, $0.0001 par value per share
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The Nasdaq Global Market
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Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐ No ☒
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Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No ☒
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Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐
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Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes ☒ No ☐
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Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§ 229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ☐
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Large accelerated filer ☐
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Accelerated filer ☒
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Non-accelerated filer ☐
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Smaller reporting company ☐
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Emerging growth company ☒
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TABLE OF CONTENTS
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Item 1A.
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Risk Factors
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Item 1B.
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Unresolved Staff Comments
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Item 2.
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Properties
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Item 3.
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Legal Proceedings
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Item 4.
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Mine Safety Disclosures
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Part II
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Item 5.
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Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
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Item 6.
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Selected Consolidated Financial Data
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Item 7.
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Management's Discussion and Analysis of Financial Condition and Results of Operations
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Item 7A.
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Quantitative and Qualitative Disclosures About Market Risk
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Item 8.
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Financial Statements and Supplementary Data
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Item 9.
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Changes in and Disagreements With Accountants on Accounting and Financial Disclosure
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Item 9A.
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Controls and Procedures
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Item 9B.
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Other Information
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Part III
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Item 10.
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Directors, Executive Officers and Corporate Governance
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Item 11.
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Executive Compensation
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Item 12.
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Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
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Item 13.
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Certain Relationships and Related Transactions, and Director Independence
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Item 14.
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Principal Accounting Fees and Services
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Part IV
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Item 15.
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Exhibits and Financial Statement Schedules
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Item 16.
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Form 10-K Summary
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92
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SIGNATURES
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EXHIBIT INDEX
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our ability to enroll patients in clinical trials, timely and successfully complete those trials and receive necessary regulatory approvals;
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our ability to establish our own manufacturing facilities and to receive or manufacture sufficient quantities of our product candidates;
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•
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Advance the development of SEL-212 for the treatment of chronic severe gout.
We believe SEL-212 has the potential to become the first biologic treatment that durably controls uric acid while also dissolving harmful deposits of uric acid crystals for a majority of patients with chronic severe gout. We are currently conducting a Phase 1/2 clinical program, comprised of two completed Phase 1 clinical studies and an ongoing Phase 2 clinical trial. We expect to commence enrollment for our planned Phase 3 clinical program in 2018 and intend to advance this program through regulatory approval and commercialization, if warranted by clinical trial results.
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Leverage SVP-Rapamycin to develop additional novel uses and classes of non-immunogenic biologics.
We intend to use our SVP technology to develop a range of proprietary, non-immunogenic biologic therapies. Our current pipeline includes SEL-212 for chronic severe gout, SEL-403 for solid tumors, as well as proprietary gene therapies that could potentially be re-dosed for rare diseases. In addition, we intend to pursue opportunities to co-administer SVP-Rapamycin with other biologic therapies. In each case, SVP-Rapamycin would be evaluated for its potential to mitigate undesired immune response to the biologic therapy with the goal of improving efficacy and/or safety. Our strategy is to develop proprietary treatments for rare and serious diseases by combining SVP-Rapamycin with biologics that have been in- licensed or provided through research collaborations.
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Establish infrastructure and capabilities to commercialize our products in rare and orphan diseases.
While we believe our SVP technology may be broadly applicable across disease areas, we intend to focus our proprietary efforts on developing and commercializing proprietary SVP-enabled products for rare and serious diseases where there is high unmet medical need. Therapies for treating these diseases require focused commercial efforts and coordination with patient groups and investigators. As our first product candidate, SEL-212, advances toward Phase 3 clinical trials and potential commercialization, we intend to build a commercial infrastructure to capture its full value.
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Selectively pursue collaborations and maximize the value of our SVP programs for immune tolerance.
In addition to our own proprietary product development efforts, we are in discussions with potential collaborators and licensees to pursue novel new therapies that would utilize our SVP technology. For example, in December 2016, we entered into
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Opportunistically utilize our SVP technology to stimulate the immune system to fight disease.
We have been utilizing non-dilutive funding and our SVP immune stimulation technology to develop prophylactic and therapeutic vaccines that activate the immune system to fight disease. Our product candidates in this area have included a nicotine vaccine candidate for smoking cessation and relapse prevention, an immunotherapy to treat HPV-associated cancers, and a product candidate for the prevention of malaria. We have developed our program for smoking cessation and relapse prevention with grant funding from the National Institute for Drug Abuse, and for HPV-associated cancers with grant funding from the Skolkovo Foundation. We also recently completed a preclinical malaria program under a sponsored research arrangement with The Bill and Melinda Gates Foundation.
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Immunosuppressive therapies.
Immunosuppressive therapies are designed to suppress the immune system and inhibit an undesired immune response. However, many current therapies are not antigen-specific and, as a result, broadly suppress the immune system leading to undesired side effects that include opportunistic infections, skin cancer and lymphomas. We believe there is an opportunity to develop therapies that instruct the immune system to mitigate the formation of ADAs in an antigen-specific manner and remain tolerant to the specific antigen, thereby mitigating off-target effects of systemic immunosuppression.
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Immunostimulatory therapies.
Immunostimulatory therapies are designed to stimulate the immune system to prevent or treat infections and cancers. The most common class of immunostimulatory therapies are vaccines, which are designed to simulate the body’s immune system to mount a defensive response to a specific antigen. While traditional vaccines have been successful for the prevention of infectious diseases, there has been limited success in developing therapeutic vaccines for the successful treatment of certain other diseases, including chronic infections and cancer. As a result, we believe there is a need for more effective vaccines to treat these diseases.
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combination with a uricase enzyme for the treatment of chronic severe gout;
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combination with a recombinant immunotoxin for the treatment of various solid tumors, including mesothelioma;
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combination with gene therapies for the treatment of rare diseases;
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potential application with other marketed products, product candidates in development and novel biologic drugs that would otherwise be too immunogenic to develop; and
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immune stimulation applications for smoking cessation and relapse prevention and HPV-associated cancers.
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tolerogenic response to mitigate the formation of ADAs against a biologic drug or treat allergies and autoimmune diseases; or
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potent antigen-specific stimulatory response, such as an antibody response to a microbial antigen or a cytolytic T cell response to a tumor antigen.
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Therapeutic enzymes
. Therapeutic enzymes are a frequently used class of biologic drugs to treat rare diseases. Through our analysis of biologic drugs, including our preclinical studies, we have observed that enzymes are especially prone to undesired immune responses. Our first product candidate, SEL-212, includes pegsiticase, a pegylated uricase enzyme, which is an example of an immunogenic enzyme for which we are applying SVP-Rapamycin with the intention of improving the enzyme’s efficacy and safety. Other examples of immunogenic enzymes include acid alpha-glucosidase for the treatment of Pompe disease, alpha galactosidase A for the treatment of Fabry’s disease and microbial enzymes such as asparaginase for the treatment of cancers. We intend to seek opportunities to secure supply of and, if appropriate, licenses to these or other enzymes that we would pair with SVP-Rapamycin to enhance their efficacy, safety and use in their treatment of diseases.
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Oncology treatments
. While a variety of cancer treatments have demonstrated the potential to halt or reverse the course of tumor growth in patients, some of these therapies have proven to be highly immunogenic. One such example is LMB-100, now an investigational immunotoxin developed in collaboration with NCI. The majority of mesothelioma patients treated with an earlier version of LMB-100, called SS1P, experienced dose-limiting immune responses despite the use of potent immunosuppressants. However, the few chemotherapy-refractory mesothelioma patients tolerating more than two treatment cycles in this Phase 1 clinical trial showed marked antitumor responses. We and NCI have observed in preclinical studies that SEL-403, consisting of SVP-Rapamycin dosed in combination with LMB-100, prevented the formation of anti-LMB-100 antibodies and allowed for the administration of at least four treatment cycles in mouse models, representing a meaningful increase in the number of effective doses that could be administrated without the onset of neutralizing antibodies. Further, in a tumor model, the addition of SVP-Rapamycin to the regimen showed a beneficial effect on controlling tumor growth. We in-licensed LMB-100 from NCI in 2017. In March 2018, we initiated a Phase 1 clinical trial of SEL-403, consisting of SVP-Rapamycin and LBM-100 in patients with malignant pleural or peritoneal mesothelioma who have undergone at least one regimen of chemotherapy.
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Gene therapies
. We believe gene therapies have the potential to address key unmet medical needs for many rare genetic diseases, but undesired immune responses to the viral vectors used for gene replacement, augmentation and editing may be restricting their broader use. Through our analysis of genetic diseases, we have identified applications and patient segments that we believe would benefit from our SVP technology. We intend to develop proprietary SVP-Rapamycin-enabled non-immunogenic gene therapies with viral vectors such as the Anc80 vector that we have licensed from MEE. We believe our product candidates have the potential to mitigate the problem of pre-existing immunogenicity to the gene therapy vector by using Anc80 and to prevent undesired immune responses to the vector and transgene that can occur with the first dose of gene therapy by using our SVP technology. Our initial areas of focus include lysosomal storage, genetic muscular and genetic metabolic diseases. We believe we are the first company to systematically pursue the development of gene therapy product candidates with the goal of enabling repeat administration. We have engaged third parties with experience in gene therapy and rare diseases to support the development of our proprietary products. We also have licensed our SVP-Rapamycin technology to Spark Therapeutics for the development of gene therapies for certain pre-specified targets. For more information, see "Licenses and Collaborations - Spark Therapeutics".
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Other products and product candidates affected by undesired immune responses
. We have generated preclinical data which we believe suggests a broad potential benefit of SVP for immune tolerance. For many biologic drugs, undesired immune responses limit efficacy and cause safety concerns. This includes TNF-alpha-specific monoclonal antibodies for the treatment of rheumatoid arthritis and coagulation factor replacement therapies for the treatment of hemophilia. We intend to out-license SVP-Rapamycin technology for use with other products that are outside our focus to larger biopharmaceutical companies. We believe our SVP technology may also be of interest to biopharmaceutical companies with novel biologic development concepts or product candidates in clinical development that have demonstrated initial efficacy but are experiencing issues with safety or sustained efficacy due to inhibitory ADAs.
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Control and Low SVP-Rapamycin Dose Cohorts
(cohorts receiving five monthly doses of pegsiticase alone or three monthly doses of 0.2 mg/kg or 0.4 mg/kg of pegsiticase + 0.05 mg/kg of SVP-Rapamycin followed by two monthly doses of pegsiticase alone): Dosing of patients in the control cohorts receiving pegsiticase alone was stopped early due to a loss of clinical activity caused by the immunogenicity of the enzyme. Clinical activity was lost by week 12 in the majority of patients receiving pegsiticase in combination with the 0.05 mg/kg dose of SVP-Rapamycin.
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Mid SVP-Rapamycin Dose Cohorts
(cohorts receiving three monthly doses of 0.2 mg/kg or 0.4 mg/kg of pegsiticase + 0.08 or 0.10 mg/kg of SVP-Rapamycin followed by two monthly doses of pegsiticase alone): A majority of patients in these cohorts maintained clinical activity while receiving the combination therapy through week 12. These results are consistent with the level of clinical activity observed through day 30 at a similar SEL-212 dose level in our Phase 1b trial. At the 0.1 mg/kg dose level, half of the patients that maintained clinical activity through week 12 also maintained clinical activity through week 20.
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Higher SVP-Rapamycin Dose Cohorts
(cohorts receiving three monthly doses of pegsiticase +0.125 or 0.15 mg/kg of SVP-Rapamycin followed by two monthly doses of pegsiticase alone): These cohorts were fully enrolled as of March 9, 2018, and we expect to present initial data at a medical conference in the first half of April 2018.
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tolerance and cancer immunotherapy programs;
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other immune stimulation programs;
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methods and compositions incorporating our proprietary SVP nanoparticle in a variety of tolerance applications, including:
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mitigating or treating anti-drug antibodies association with protein drugs such as pegsiticase or LMB-100, and
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genetic therapies (such as viral delivery of genes).
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development and commercialization of SEL-212, including both composition of matter and method of treatment claims (there are three patent families that cover the SEL-212 product, one of which is a licensed, issued U.S. patent that covers the SEL-212 product, which expires in 2021); and
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methods and compositions incorporating our proprietary SVP nanoparticle in a variety of cancer immunotherapy applications, including:
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creating various cancer vaccines, and
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combination treatments, including co-treatment with PD-1/PDL-1 checkpoint inhibitors.
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Program
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Description
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Patent
Family(1)
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Expiration(2)
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Refractory and chronic tophaceous gout (SEL-212)
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SVP-Rapamycin co-administered with pegsiticase
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19
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2032-2037
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Mesothelioma/Pancreatic Cancer
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SVP-Rapamycin co-administered with LMB-100
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16
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2032-2035
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Gene therapy
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SVP-Rapamycin co-administered with AAV vector
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19
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2032-2035
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Peanut allergy
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SVP-adjuvant and SVP-food allergen
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13
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2032-2035
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Celiac disease
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SVP-Rapamycin and SVP-gluten
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13
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2032-2035
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Type 1 diabetes
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SVP-Rapamycin and SVP-gluten
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15
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2032-2035
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Smoking cessation and relapse prevention (SELA-070)
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SVP-adjuvant and SVP-nicotine
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6
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2030-2032
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HPV-associated cancer (SEL-701)
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SVP-adjuvant and SVP-HPV antigen
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6
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2030-2032
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(1)
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Reflects number of relevant patent and patent application families.
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(2)
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Reflects expiration date and estimated expiration date ranges of issued patents and patent applications, respectively.
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completion of extensive nonclinical testing, sometimes referred to as preclinical testing, including laboratory tests, animal trials and formulation studies in accordance with applicable regulations, including good laboratory practices, or GLPs, and applicable requirements for humane use of laboratory animals;
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submission to the FDA of an IND, which must become effective before human clinical trials may begin;
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performance of adequate and well-controlled human clinical trials according to the FDA’s regulations commonly referred to as good clinical practice, or GCP, regulations and any additional requirements for the protection of human research subjects and their health information, to establish the safety, purity and potency of the proposed biological product for its intended use;
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submission to the FDA of a BLA for marketing approval that includes substantive evidence of safety, purity, and potency from results of nonclinical testing and clinical trials;
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satisfactory completion of an FDA inspection of the manufacturing facility or facilities where the biological product is produced to assess compliance with cGMP requirements to assure that the facilities, methods and controls are adequate to preserve the biological product’s identity, strength, quality and purity;
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potential FDA audit of the nonclinical and clinical study sites that generated the data in support of the BLA; and
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FDA review and approval, or licensure, of the BLA.
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Phase I.
The biological product candidate is initially introduced into healthy human patients and tested for safety. In the case of some products for severe or life-threatening diseases, especially when the product may be too inherently toxic to ethically administer to healthy volunteers, the initial human testing is often conducted in patients.
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Phase II.
The biological product candidate is evaluated in a limited patient population to identify possible adverse effects and safety risks, to preliminarily evaluate the efficacy of the product for specific targeted diseases and to determine dosage tolerance, optimal dosage and dosing schedule.
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Phase III.
Clinical trials are undertaken to further evaluate dosage, clinical efficacy, potency, and safety in an expanded patient population at geographically dispersed clinical study sites. These clinical trials are intended to establish the overall risk/benefit ratio of the product and provide an adequate basis for product labeling.
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The Community MA, which is issued by the European Commission through the Centralized Procedure, based on the opinion of the Committee for Medicinal Products for Human Use, or CHMP, of the European Medicines Agency, or EMA, and which is valid throughout the entire territory of the EEA. The Centralized Procedure is mandatory for certain types of products, such as biotechnology medicinal products, orphan medicinal products, and medicinal products that contain a new active substance indicated for the treatment of AIDS, cancer, neurodegenerative disorders, diabetes, auto-immune and viral diseases. The Centralized Procedure is optional for products containing a new active substance not yet authorized in the EEA, or for products that constitute a significant therapeutic, scientific or technical innovation or which are in the interest of public health in the EU. Under the Centralized Procedure the maximum timeframe for the evaluation of a marketing authorization application is 210 days (excluding clock stops, when additional written or oral information is to be provided by the applicant in response to questions asked by the CHMP). Accelerated evaluation might be granted by the CHMP in exceptional cases, when the authorization of a medicinal product is of major interest from the point of view of public health and in particular from the viewpoint of therapeutic innovation. Under the accelerated procedure the standard 210 days review period is reduced to 150 days.
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National MAs, which are issued by the competent authorities of the Member States of the EEA and only cover their respective territory, are available for products not falling within the mandatory scope of the Centralized Procedure. Where a product has already been authorized for marketing in a Member State of the EEA, this National MA can be recognized in another Member States through the Mutual Recognition Procedure. If the product has not received a National MA in any Member State at the time of application, it can be approved simultaneously in various Member States through the Decentralized Procedure.
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second applicant can establish that its product, although similar, is safer, more effective or otherwise clinically superior;
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applicant consents to a second orphan medicinal product application; or
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applicant cannot supply enough orphan medicinal product.
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continue the research and development of our other product candidates;
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potentially establish a sales, marketing and distribution infrastructure and scale up external manufacturing capabilities to commercialize any products for which we may obtain regulatory approval;
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maintain, expand and protect our intellectual property portfolio, including through licensing arrangements;
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add clinical, scientific, operational, financial and management information systems and personnel, including personnel to support our product development and potential future commercialization efforts and to support our operations as a public company; and
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experience any delays or encounter any issues with any of the above, including, but not limited to, failed studies, complex results, safety issues or other regulatory challenges.
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our collaboration agreements remaining in effect, our entering into additional collaboration agreements and our ability to achieve milestones under these agreements;
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the scope, progress, results and costs of preclinical development, laboratory testing and clinical trials for our other product candidates;
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the costs and timing of future commercialization activities, including manufacturing, marketing, sales and distribution, for any of our product candidates for which we receive marketing approval;
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the costs and timing of preparing, filing and prosecuting patent applications, maintaining and enforcing our intellectual property rights and defending any intellectual property‑related claims;
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the extent to which we acquire or invest in businesses, products and technologies, including entering into licensing or collaboration arrangements for product candidates.
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completion of preclinical studies and clinical trials with positive results;
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receipt of marketing approvals from applicable regulatory authorities;
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obtaining and maintaining patent and trade secret protection and regulatory exclusivity for our product candidates;
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making arrangements with third-party manufacturers for, or establishing, commercial manufacturing capabilities, or --establishing such capabilities ourselves;
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launching commercial sales of our products, if and when approved, whether alone or in collaboration with others;
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our existing collaboration agreements remaining in effect and our ability to enter into new collaborations throughout the development process as appropriate, from preclinical studies through to commercialization;
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acceptance of our products, if and when approved, by patients and the medical community;
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effectively competing with other therapies;
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obtaining and maintaining coverage and adequate reimbursement by third‑party payors, including government payors, for our products, if approved;
|
|
-
|
protecting our rights in our intellectual property portfolio;
|
|
-
|
operating without infringing or violating the valid and enforceable patents or other intellectual property of third parties;
|
|
-
|
maintaining an acceptable safety profile of our products following approval; and
|
|
-
|
maintaining and growing an organization of scientists and business people who can develop and commercialize our product candidates and technology.
|
|
-
|
due to the unproven nature of our SVP therapeutics, they may have different efficacy and safety rates in various indications;
|
|
-
|
the FDA or other regulatory agencies may lack experience in evaluating the efficacy and safety of products based on SVP or a biologic sourced from China or other jurisdictions, which could result in a longer‑than‑expected regulatory review process, increase our expected development costs or delay or prevent commercialization of our product candidates; and
|
|
-
|
in the event of a biologics license application for SEL‑212 or another product and a pre‑approval inspection by the FDA of the facilities of 3SBio or any other manufacturer of biologics we may use, the FDA may not approve the facility for production or may make observations that will take significant time for 3SBio or such other provider to address.
|
|
-
|
clinical trials of our product candidates may produce unfavorable, incomplete or inconclusive results;
|
|
-
|
regulators or institutional review boards may not authorize us or our investigators to commence a clinical trial or conduct a clinical trial at a prospective trial site;
|
|
-
|
we may experience delays in reaching, or fail to reach, agreement on acceptable terms with contract research organizations, or CROs, or clinical trial sites;
|
|
-
|
we may be unable to recruit suitable patients to participate in a clinical trial, the number of patients required for clinical trials of our product candidates may be larger than we expect, enrollment in these clinical trials may be slower than we expect or participants may drop out of these clinical trials at a higher rate that we expect;
|
|
-
|
the number of clinical trial sites required for clinical trials of our product candidates may be larger than we expect;
|
|
-
|
our third‑party contractors may fail to comply with regulatory requirements or meet their contractual obligations to us in a timely manner, or at all;
|
|
-
|
we may have to suspend or terminate clinical trials of our product candidates for various reasons, including a finding that the participants are being exposed to unacceptable health risks;
|
|
-
|
investigators, regulators, data safety monitoring boards or institutional review boards may require that we or our investigators suspend or terminate clinical research, or we may decide to do so ourselves;
|
|
-
|
investigators may deviate from the trial protocol, fail to conduct the trial in accordance with regulatory requirements or misreport study data;
|
|
-
|
the cost of clinical trials of our product candidates may be greater than we expect;
|
|
-
|
the supply or quality of raw materials or manufactured product candidates (whether provided by us or third parties) or other materials necessary to conduct clinical trials of our product candidates may be insufficient, inadequate or not available at an acceptable cost, or we may experience interruptions in supply;
|
|
-
|
regulators may revise the requirements for approving our product candidates, or such requirements may not be as we expect;
|
|
-
|
the FDA or comparable foreign regulatory authorities may disagree with our clinical trial design or our interpretation of data from preclinical studies and clinical trials, or may change the requirements for approval even after it has reviewed and commented on the design of our clinical trials; and
|
|
-
|
regarding trials managed by our existing or any future collaborators, our collaborators may face any of the above issues, and may conduct clinical trials in ways they view as advantageous to them but potentially suboptimal for us.
|
|
-
|
be delayed in obtaining marketing approval for our product candidates, if at all;
|
|
-
|
lose the support of collaborators, requiring us to bear more of the burden of research and development;
|
|
-
|
not obtain marketing approval at all;
|
|
-
|
obtain marketing approval in some countries and not in others;
|
|
-
|
obtain approval for indications or patient populations that are not as broad as intended or desired;
|
|
-
|
obtain approval with labeling that includes significant use or distribution restrictions or safety warnings;
|
|
-
|
be subject to additional post‑marketing testing requirements; or
|
|
-
|
have a product removed from the market after obtaining marketing approval.
|
|
-
|
the severity of the disease under investigation;
|
|
-
|
the patient eligibility criteria for the study in question;
|
|
-
|
the perceived risks and benefits of the product candidate under study;
|
|
-
|
the availability of other treatments for the disease under investigation;
|
|
-
|
the existence of competing clinical trials;
|
|
-
|
our efforts to facilitate timely enrollment in clinical trials;
|
|
-
|
investigators engagement with, or enthusiasm about, the trial;
|
|
-
|
our payments for participating in clinical trials;
|
|
-
|
the patient referral practices of physicians;
|
|
-
|
the design of the trial;
|
|
-
|
the ability to monitor patients adequately during and after treatment; and
|
|
-
|
the proximity and availability of clinical trial sites for prospective patients.
|
|
-
|
regulatory authorities may withdraw approvals of such product;
|
|
-
|
regulatory authorities may require the addition of labeling statements, such as a “black box” warning or a contraindication;
|
|
-
|
regulatory authorities may impose additional restrictions on the marketing of, or the manufacturing processes for, the particular product;
|
|
-
|
we may be required to create a medication guide outlining the risks of such side effects for distribution to patients;
|
|
-
|
we could be sued and held liable for harm caused to patients, or become subject to fines, injunctions or the imposition of civil or criminal penalties; and
|
|
-
|
our reputation may suffer.
|
|
-
|
inability, failure or unwillingness of third‑party manufacturers to comply with regulatory requirements, maintain quality assurance, meet our needs, specifications or schedules or continue to supply products to us;
|
|
-
|
reduced control we have over product development, including with respect to our lead product candidate, due to our reliance on such third‑party manufacturers,
|
|
-
|
breach of manufacturing agreements by the third‑party manufacturers;
|
|
-
|
misappropriation or disclosure of our proprietary information, including our trade secrets and know‑how;
|
|
-
|
relationships that the third party manufacturer may have with others, some of which may be our competitors, and, if it does not successfully carry out its contractual duties, does not meet expectations, experiences work stoppages, or needs to be replaced, we may need to enter into alternative arrangements, which may not be available, desirable or cost‑effective; and
|
|
-
|
termination or nonrenewal of agreements by third‑party manufacturers at times that are costly or inconvenient for us.
|
|
-
|
collaborators have significant discretion in determining the efforts and resources that they will apply to these collaborations;
|
|
-
|
collaborators may not perform their obligations as expected;
|
|
-
|
collaborators may not pursue development and commercialization of any product candidates that achieve regulatory approval or may elect not to continue or renew development or commercialization programs based on preclinical or clinical trial results, changes in the collaborators’ strategic focus or available funding, or external factors, such as an acquisition, that divert resources or create competing priorities;
|
|
-
|
collaborators may delay clinical trials, provide insufficient funding for a clinical trial program, stop a clinical trial or abandon a product candidate, repeat or conduct new clinical trials or require a new formulation of a product candidate for clinical testing;
|
|
-
|
collaborators could independently develop, or develop with third parties, products that compete directly or indirectly with our product candidates if the collaborators believe that competitive products are more likely to be successfully developed or can be commercialized under terms that are more economically attractive than ours, which may cause collaborators to cease to devote resources to the commercialization of our product candidates;
|
|
-
|
a collaborator with marketing and distribution rights to one or more of our product candidates that achieve regulatory approval may not commit sufficient resources to the marketing and distribution of such product or products;
|
|
-
|
disagreements with collaborators, including disagreements over proprietary rights, contract interpretation or the preferred course of development, might cause delays or termination of the research, development or commercialization of product candidates, might lead to additional responsibilities for us with respect to product candidates, or might result in litigation or arbitration, any of which would be time‑consuming and expensive;
|
|
-
|
collaborators may not properly maintain or defend our intellectual property rights or may use our proprietary information in such a way as to invite litigation that could jeopardize or invalidate our intellectual property or proprietary information or expose us to potential litigation;
|
|
-
|
collaborators may infringe the intellectual property rights of third parties, which may expose us to litigation and potential liability;
|
|
-
|
collaborations may be terminated for the convenience of the collaborator or for our failure to comply with our obligations under existing or future collaborations and, if terminated, we would potentially lose the right to pursue further development or commercialization of the applicable product candidates;
|
|
-
|
collaborators may learn about our technology and use this knowledge to compete with us in the future;
|
|
-
|
there may be conflicts between different collaborators that could negatively affect those collaborations and potentially others;
|
|
-
|
the number and type of our collaborations could adversely affect our attractiveness to future collaborators or acquirers; and
|
|
-
|
we currently have, and in the future may have, a limited number of collaborations and the loss of, or a disruption in our relationship with, any one or more of such collaborators may could harm our business.
|
|
-
|
their efficacy, safety and other potential advantages compared to alternative treatments;
|
|
-
|
the clinical indications for which our product candidates are approved;
|
|
-
|
our ability to offer them for sale at competitive prices;
|
|
-
|
their convenience and ease of administration compared to alternative treatments;
|
|
-
|
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;
|
|
-
|
the availability of third‑party coverage and adequate reimbursement for our product candidates;
|
|
-
|
the prevalence and severity of their side effects and their overall safety profiles;
|
|
-
|
any restrictions on the use of our product candidates together with other medications;
|
|
-
|
interactions of our product candidates with other medicines patients are taking;
|
|
-
|
our ability to create awareness with patients and physicians about the harmful effects of uric acid deposits;
|
|
-
|
the timing of market introduction of any approved product candidates as well as competitive products and other therapies;
|
|
-
|
inability of certain types of patients to take our product candidates;
|
|
-
|
their ability to remain attractive in the event of changing treatment guidelines;
|
|
-
|
adverse publicity about the product or favorable publicity about competitive products; and
|
|
-
|
potential product liability claims.
|
|
-
|
regulatory investigations, product recalls or withdrawals, or labeling, marketing or promotional restrictions;
|
|
-
|
decreased demand for any product candidates or products that we may develop;
|
|
-
|
injury to our reputation and significant negative media attention;
|
|
-
|
loss of clinical trial participants or increased difficulty in enrolling future participants;
|
|
-
|
significant costs to defend the related litigation or to reach a settlement;
|
|
-
|
substantial payments to trial participants or patients;
|
|
-
|
loss of revenue;
|
|
-
|
reduced resources of our management to pursue our business strategy; and
|
|
-
|
the inability to commercialize any products that we may develop.
|
|
-
|
the federal Anti‑Kickback Statute, which prohibits, among other things, persons and entities from knowingly and willfully soliciting, offering, receiving or providing remuneration, directly or indirectly, in cash or in kind, to induce or reward, or in return for, either the referral of an individual for, or the purchase, order or recommendation of, any good or service for which payment may be made under a federal healthcare program such as Medicare and Medicaid. A person or entity does not need to have actual knowledge of the statute or specific intent to violate it to have committed a violation; in addition, the government may assert that a claim including items or services resulting from a violation of the federal Anti‑Kickback Statute constitutes a false or fraudulent claim for purposes of the False Claims Act;
|
|
-
|
the federal false claims and civil monetary penalties laws, including the civil False Claims Act, which impose criminal and civil penalties against individuals or entities for knowingly presenting, or causing to be presented, to the federal government claims for payment that are false or fraudulent. Private individuals (e.g., whistleblowers) can bring these actions on behalf of the government;
|
|
-
|
the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, which imposes criminal and civil liability for, among other things, executing or attempting to execute a scheme to defraud any healthcare benefit program or making false statements relating to healthcare matters. A person or entity does not need to have actual knowledge of the statute or specific intent to violate it to have committed a violation;
|
|
-
|
HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act, or HITECH, and its implementing regulations, which also imposes obligations, including mandatory contractual terms, on certain types of people and entities with respect to safeguarding the privacy, security and transmission of individually identifiable health information;
|
|
-
|
the federal Physician Payments Sunshine Act, which requires applicable manufacturers of certain products for which payment is available under a federal healthcare program to report annually to the government information related to certain payments or other “transfers of value” made to physicians and teaching hospitals, as well as ownership and investment interests held by the physicians and their immediate family members; and
|
|
-
|
analogous state and foreign laws and regulations, such as state anti‑kickback and false claims laws, which may apply to sales or marketing arrangements and claims involving healthcare items or services reimbursed by third‑party payors, including private insurers; requirements to comply with federal and pharmaceutical industry compliance guidelines; state data privacy and price transparency laws, many of which differ from each other in significant ways and often are broader than and not preempted by HIPAA or the Sunshine Act, thus complicating compliance efforts.
|
|
-
|
an annual, nondeductible fee payable by any entity that manufactures or imports specified branded prescription drugs and biologic agents;
|
|
-
|
an increase in the statutory minimum rebates a manufacturer must pay under the Medicaid Drug Rebate Program;
|
|
-
|
a new methodology by which rebates owed by manufacturers under the Medicaid Drug Rebate Program are calculated for drugs that are inhaled, infused, instilled, implanted or injected;
|
|
-
|
extension of manufacturers’ Medicaid rebate liability to individuals enrolled in Medicaid managed care organizations;
|
|
-
|
expansion of the entities eligible for discounts under the Public Health Service pharmaceutical pricing program;
|
|
-
|
a new requirement to annually report drug samples that manufacturers and distributors provide to physicians; and
|
|
-
|
a new Patient‑Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, along with funding for such research.
|
|
-
|
litigation involving patients taking our products;
|
|
-
|
restrictions on such products, manufacturers or manufacturing processes;
|
|
-
|
restrictions on the labeling or marketing of a product;
|
|
-
|
restrictions on product distribution or use;
|
|
-
|
requirements to conduct post‑marketing studies or clinical trials;
|
|
-
|
warning letters;
|
|
-
|
withdrawal of products from the market;
|
|
-
|
suspension or termination of ongoing clinical trials;
|
|
-
|
refusal to approve pending applications or supplements to approved applications that we submit;
|
|
-
|
recall of products;
|
|
-
|
fines, restitution or disgorgement of profits or revenues;
|
|
-
|
suspension or withdrawal of marketing approvals;
|
|
-
|
damage to relationships with existing and potential collaborators;
|
|
-
|
unfavorable press coverage and damage to our reputation;
|
|
-
|
refusal to permit the import or export of our products;
|
|
-
|
product seizure or detention;
|
|
-
|
injunctions; or
|
|
-
|
imposition of civil or criminal penalties.
|
|
-
|
multiple, conflicting and changing laws and regulations, such as privacy regulations, tax laws, export and import restrictions, employment laws, regulatory requirements and other governmental approvals, permits and licenses;
|
|
-
|
failure by us to obtain and maintain regulatory approvals for the use of our product candidates in various countries;
|
|
-
|
additional potentially relevant third‑party patent rights;
|
|
-
|
complexities and difficulties in obtaining protection of and enforcing our intellectual property rights;
|
|
-
|
difficulties in staffing and managing foreign operations;
|
|
-
|
complexities associated with managing multiple‑payor reimbursement regimes, government payors or patient self‑pay systems;
|
|
-
|
limits on our ability to penetrate international markets;
|
|
-
|
financial risks, such as longer payment cycles, difficulty collecting accounts receivable, the impact of local and regional financial crises on demand and payment for our product candidates and exposure to foreign currency exchange rate fluctuations, which could result in increased operating expenses and reduced revenues;
|
|
-
|
natural disasters, political and economic instability, including wars, events of terrorism and political unrest, outbreak of disease, boycotts, curtailment of trade and other business restrictions and economic weakness, including inflation;
|
|
-
|
changes in diplomatic and trade relationships;
|
|
-
|
challenges in enforcing our contractual and intellectual property rights, especially in those foreign countries that do not respect and protect intellectual property rights to the same extent as the United States;
|
|
-
|
certain expenses including, among others, expenses for travel, translation and insurance;
|
|
-
|
legal risks, including use of the legal system by the government to benefit itself or affiliated entities at our expense, including expropriation of property; and
|
|
-
|
regulatory and compliance risks that relate to maintaining accurate information and control over sales and activities that may fall within the purview of the FCPA its books and records provisions, or its anti‑bribery provisions.
|
|
-
|
disruption in our relationships with future customers or with current or future distributors or suppliers as a result of such a transaction;
|
|
-
|
unexpected liabilities related to acquired companies;
|
|
-
|
difficulties integrating acquired personnel, technologies and operations into our existing business;
|
|
-
|
diversion of management time and focus from operating our business to acquisition integration challenges;
|
|
-
|
increases in our expenses and reductions in our cash available for operations and other uses;
|
|
-
|
possible write‑offs or impairment charges relating to acquired businesses; and
|
|
-
|
inability to develop a sales force for any additional product candidates.
|
|
-
|
the success of competitive products or technologies;
|
|
-
|
results of clinical trials of our product candidates or those of our competitors;
|
|
-
|
failure or discontinuation of any of our development programs;
|
|
-
|
commencement of, termination of, or any development related to any collaboration or licensing arrangement;
|
|
-
|
regulatory or legal developments in the United States and other countries;
|
|
-
|
development of new product candidates that may address our markets and make our product candidates less attractive;
|
|
-
|
changes in physician, hospital or healthcare provider practices that may make our product candidates less useful;
|
|
-
|
announcements by us, our partners or our competitors of significant acquisitions, strategic partnerships, joint ventures, collaborations or capital commitments;
|
|
-
|
announcement or market expectation of additional financing efforts;
|
|
-
|
developments or disputes concerning patent applications, issued patents or other proprietary rights;
|
|
-
|
the recruitment or departure of key personnel;
|
|
-
|
the level of expenses related to any of our product candidates or clinical development programs;
|
|
-
|
failure to meet or exceed financial estimates, projections or development timelines of the investment community or that we provide to the public;
|
|
-
|
the results of our efforts to discover, develop, acquire or in‑license additional product candidates or products;
|
|
-
|
actual or expected changes in estimates as to financial results, development timelines or recommendations by securities analysts;
|
|
-
|
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;
|
|
-
|
sale of common stock by us or our stockholders in the future as well as the overall trading volume of our common stock;
|
|
-
|
market conditions in the pharmaceutical and biotechnology sectors;
|
|
-
|
general economic, industry and market conditions; and
|
|
-
|
the other factors described in this “Risk factors” section.
|
|
-
|
not being required to comply with the auditor attestation requirements in the assessment of our internal control over financial reporting;
|
|
-
|
not being required to comply with any requirement that may be adopted by the Public Company Accounting Oversight Board regarding mandatory audit firm rotation or a supplement to the auditor’s report providing additional information about the audit and the financial statements;
|
|
-
|
reduced disclosure obligations regarding executive compensation; and
|
|
-
|
exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and shareholder approval of any golden parachute payments not previously approved.
|
|
Year ended December 31, 2017
|
High
|
|
Low
|
||||
|
First Quarter
|
$
|
18.50
|
|
|
$
|
10.27
|
|
|
Second Quarter
|
$
|
20.39
|
|
|
$
|
11.17
|
|
|
Third Quarter
|
$
|
21.42
|
|
|
$
|
14.72
|
|
|
Fourth Quarter
|
$
|
24.02
|
|
|
$
|
8.70
|
|
|
Year ended December 31, 2016
|
|
|
|
||||
|
Second Quarter (beginning June 21, 2016)
|
$
|
16.32
|
|
|
$
|
11.16
|
|
|
Third Quarter
|
$
|
18.88
|
|
|
$
|
10.26
|
|
|
Fourth Quarter
|
$
|
28.00
|
|
|
$
|
13.69
|
|
|
Company/Index
|
6/21/2016
|
|
9/30/2016
|
|
12/31/2016
|
|
3/31/2017
|
|
6/30/2017
|
|
9/30/2017
|
|
12/31/2017
|
||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||||||||
|
Selecta Biosciences, Inc.
|
$
|
100.00
|
|
|
$
|
101.79
|
|
|
$
|
122.50
|
|
|
$
|
102.29
|
|
|
$
|
141.86
|
|
|
$
|
130.36
|
|
|
$
|
70.07
|
|
|
Nasdaq Composite Index
|
100.00
|
|
|
110.25
|
|
|
112.08
|
|
|
123.43
|
|
|
128.57
|
|
|
136.36
|
|
|
145.29
|
|
|||||||
|
Nasdaq Biotechnology Index
|
100.00
|
|
|
112.98
|
|
|
103.59
|
|
|
114.82
|
|
|
121.55
|
|
|
130.97
|
|
|
126.00
|
|
|||||||
|
|
Year Ended December 31,
|
||||||||||||||
|
(In thousands, except share and per share data)
|
2017
|
|
2016
|
|
2015
|
|
2014
|
||||||||
|
Consolidated Statement of Operations Data
|
|
||||||||||||||
|
Grant and collaboration revenue
|
$
|
207
|
|
|
$
|
8,083
|
|
|
$
|
6,011
|
|
|
$
|
3,040
|
|
|
Operating expenses
|
63,991
|
|
|
42,753
|
|
|
31,315
|
|
|
18,439
|
|
||||
|
Loss from operations
|
(63,784
|
)
|
|
(34,670
|
)
|
|
(25,304
|
)
|
|
(15,399
|
)
|
||||
|
Loss on extinguishment of debt
|
(673
|
)
|
|
—
|
|
|
—
|
|
|
—
|
|
||||
|
Other income (expense), net
|
(864
|
)
|
|
(1,540
|
)
|
|
130
|
|
|
2,519
|
|
||||
|
Net loss
|
$
|
(65,321
|
)
|
|
$
|
(36,210
|
)
|
|
$
|
(25,174
|
)
|
|
$
|
(12,880
|
)
|
|
Net loss per share:
|
|
|
|
|
|
|
|
||||||||
|
Basic and diluted
|
$
|
(3.20
|
)
|
|
$
|
(3.89
|
)
|
|
$
|
(15.13
|
)
|
|
$
|
(7.84
|
)
|
|
Weighted average common shares outstanding:
|
|
|
|
|
|
|
|
||||||||
|
Basic and diluted
|
20,425,050
|
|
|
10,493,939
|
|
|
2,150,422
|
|
|
2,090,677
|
|
||||
|
|
|
|
|
|
|
|
|
||||||||
|
|
As of December 31,
|
||||||||||||||
|
(In thousands)
|
2017
|
|
2016
|
|
2015
|
|
2014
|
||||||||
|
Consolidated Balance Sheet Data
|
|
|
|
|
|
|
|
||||||||
|
Cash, cash equivalents and short-term deposits and investments
|
$
|
96,562
|
|
|
$
|
84,141
|
|
|
$
|
36,462
|
|
|
$
|
16,592
|
|
|
Total assets
|
$
|
101,100
|
|
|
$
|
89,301
|
|
|
$
|
42,824
|
|
|
$
|
22,228
|
|
|
Loans payable, net of current portion
|
$
|
21,042
|
|
|
$
|
7,977
|
|
|
$
|
11,855
|
|
|
$
|
4,824
|
|
|
Redeemable convertible preferred stock
|
$
|
—
|
|
|
$
|
—
|
|
|
$
|
137,482
|
|
|
$
|
94,033
|
|
|
Total stockholders' equity (deficit)
|
$
|
51,814
|
|
|
$
|
54,957
|
|
|
$
|
(116,493
|
)
|
|
$
|
(87,755
|
)
|
|
-
|
potentially establish a sales, marketing and distribution infrastructure and scale‑up external manufacturing capabilities to commercialize any products for which we may obtain regulatory approval;
|
|
-
|
add clinical, scientific, operational, financial and management information systems and personnel, including personnel to support our product development and potential future commercialization efforts and to support our operations as a public company.
|
|
|
Year ended December 31,
|
||||||||||
|
|
2017
|
|
2016
|
|
2015
|
||||||
|
Research and development expenses (key projects and initiatives):
|
|
|
|
|
|
||||||
|
SEL-212
|
$
|
19,593
|
|
|
$
|
9,936
|
|
|
$
|
11,407
|
|
|
SELA-070 (i)
|
1,227
|
|
|
3,781
|
|
|
1,665
|
|
|||
|
Discovery and preclinical stage product candidate programs, collectively
|
6,933
|
|
|
1,583
|
|
|
1,521
|
|
|||
|
Other internal research and development expenses
|
17,412
|
|
|
14,402
|
|
|
8,387
|
|
|||
|
Total research and development expenses
|
$
|
45,165
|
|
|
$
|
29,702
|
|
|
$
|
22,980
|
|
|
|
Year Ended December 31,
|
|
Increase
|
|||||||||||
|
|
2017
|
|
2016
|
|
(decrease)
|
|||||||||
|
Grant revenue
|
$
|
159
|
|
|
$
|
5,243
|
|
|
$
|
(5,084
|
)
|
|
(97
|
)%
|
|
Collaboration revenue
|
48
|
|
|
2,840
|
|
|
(2,792
|
)
|
|
(98
|
)%
|
|||
|
Total revenue
|
$
|
207
|
|
|
$
|
8,083
|
|
|
$
|
(7,876
|
)
|
|
(97
|
)%
|
|
|
Year Ended December 31,
|
|
Increase
|
|||||||||||
|
|
2017
|
|
2016
|
|
(decrease)
|
|||||||||
|
Research and development
|
$
|
45,165
|
|
|
$
|
29,702
|
|
|
$
|
15,463
|
|
|
52
|
%
|
|
|
Year Ended December 31,
|
|
Increase
|
|||||||||||
|
|
2017
|
|
2016
|
|
(decrease)
|
|||||||||
|
General and administrative
|
$
|
18,826
|
|
|
$
|
13,051
|
|
|
$
|
5,775
|
|
|
44
|
%
|
|
|
Year Ended December 31,
|
|
Increase
|
|||||||||||
|
|
2016
|
|
2015
|
|
(decrease)
|
|||||||||
|
Grant revenue
|
$
|
5,243
|
|
|
$
|
3,621
|
|
|
$
|
1,622
|
|
|
45
|
%
|
|
Collaboration revenue
|
2,840
|
|
|
2,390
|
|
|
450
|
|
|
19
|
%
|
|||
|
Total revenue
|
$
|
8,083
|
|
|
$
|
6,011
|
|
|
$
|
2,072
|
|
|
34
|
%
|
|
|
Year Ended December 31,
|
|
Increase
|
|||||||||||
|
|
2016
|
|
2015
|
|
(decrease)
|
|||||||||
|
Research and development
|
$
|
29,702
|
|
|
$
|
22,980
|
|
|
$
|
6,722
|
|
|
29
|
%
|
|
|
Year Ended December 31,
|
|
Increase
|
|||||||||||
|
|
2016
|
|
2015
|
|
(decrease)
|
|||||||||
|
General and administrative
|
$
|
13,051
|
|
|
$
|
8,335
|
|
|
$
|
4,716
|
|
|
57
|
%
|
|
-
|
the number of product candidates that we pursue;
|
|
-
|
our collaboration agreements remaining in effect, our entering into additional collaboration agreements and our ability to achieve milestones under these agreements;
|
|
-
|
the cost of manufacturing clinical supplies of our product candidates;
|
|
-
|
our headcount growth and associated costs;
|
|
-
|
the scope, progress, results and costs of preclinical development, laboratory testing and clinical trials for our other product candidates;
|
|
-
|
the costs and timing of future commercialization activities, including manufacturing, marketing, sales and distribution, for any of our product candidates for which we receive marketing approval;
|
|
-
|
the revenue, if any, received from commercial sales of our product candidates for which we receive marketing approval;
|
|
-
|
the costs and timing of preparing, filing and prosecuting patent applications, maintaining and enforcing our intellectual property rights and defending any intellectual property-related claims;
|
|
-
|
the effect of competing technological and market developments; and
|
|
-
|
the extent to which we acquire or invest in businesses, products and technologies, including entering into licensing or collaboration arrangements for product candidates.
|
|
|
Year Ended December 31,
|
||||||||||
|
(In thousands)
|
2017
|
|
2016
|
|
2015
|
||||||
|
Cash provided by (used in):
|
|
|
|
|
|
||||||
|
Operating activities
|
$
|
(52,037
|
)
|
|
$
|
(19,683
|
)
|
|
$
|
(22,463
|
)
|
|
Investing activities
|
(2,098
|
)
|
|
(22,100
|
)
|
|
(4,679
|
)
|
|||
|
Financing activities
|
66,023
|
|
|
67,659
|
|
|
43,906
|
|
|||
|
Effect of exchange rate changes on cash
|
78
|
|
|
443
|
|
|
(1,019
|
)
|
|||
|
Net increase in cash and cash equivalents
|
$
|
11,966
|
|
|
$
|
26,319
|
|
|
$
|
15,745
|
|
|
Contractual Obligations
|
Total
|
|
2018
|
|
2019
|
|
2020
|
|
2021
|
|
2022
|
|
Later
|
||||||||||||||
|
Operating leases obligations (1)
|
$
|
3,294
|
|
|
$
|
1,437
|
|
|
$
|
1,482
|
|
|
$
|
375
|
|
|
$
|
—
|
|
|
$
|
—
|
|
|
$
|
—
|
|
|
Research and development contract obligations (2)
|
120
|
|
|
60
|
|
|
60
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|||||||
|
Debt obligations (3)
|
25,111
|
|
|
1,065
|
|
|
4,535
|
|
|
9,093
|
|
|
8,665
|
|
|
1,753
|
|
|
—
|
|
|||||||
|
Total contractual obligations
|
$
|
28,525
|
|
|
$
|
2,562
|
|
|
$
|
6,077
|
|
|
$
|
9,468
|
|
|
$
|
8,665
|
|
|
$
|
1,753
|
|
|
$
|
—
|
|
|
Report of Independent Registered Public Accounting Firm
|
F-1
|
|
|
|
|
Consolidated Balance Sheets at December 31, 2017 and 2016
|
F-2
|
|
|
|
|
Consolidated Statements of Operations and Comprehensive Loss for the years ended December 31, 2017, 2016 and 2015
|
F-3
|
|
|
|
|
Consolidated Statements of Changes in Stockholders' Equity (Deficit) for the years ended December 31, 2017, 2016 and 2015
|
F-4
|
|
|
|
|
Consolidated Statements of Cash Flows for the years ended December 31, 2017, 2016 and 2015
|
F-5
|
|
|
|
|
Notes to Consolidated Financial Statements
|
F-6
|
|
|
|
|
|
Incorporated by Reference
|
|
|
||||||
|
Exhibit
Number
|
|
Exhibit Description
|
|
Form
|
|
File No.
|
|
Exhibit
|
|
Filing
Date
|
|
Filed
Herewith
|
|
3.1
|
|
|
8-K
|
|
001-37798
|
|
3.1
|
|
6/29/2016
|
|
|
|
|
3.2
|
|
|
8-K
|
|
001-37798
|
|
3.2
|
|
6/29/2016
|
|
|
|
|
4.1
|
|
|
S-1/A
|
|
333-211555
|
|
4.1
|
|
6/8/2016
|
|
|
|
|
4.2
|
|
|
S-1
|
|
333-211555
|
|
4.2
|
|
5/24/2016
|
|
|
|
|
4.3
|
|
|
S-1
|
|
333-211555
|
|
4.5
|
|
5/24/2016
|
|
|
|
|
4.4
|
|
|
S-1
|
|
333-211555
|
|
4.6
|
|
5/24/2016
|
|
|
|
|
4.5
|
|
|
8-K
|
|
001-37798
|
|
4.1
|
|
6/28/2017
|
|
|
|
|
4.6
|
|
|
8-K
|
|
001-37798
|
|
10.3
|
|
6/28/2017
|
|
|
|
|
10.1#
|
|
|
S-1/A
|
|
333-211555
|
|
10.2
|
|
6/8/2016
|
|
|
|
|
10.2#
|
|
|
S-1/A
|
|
333-211555
|
|
10.3
|
|
6/8/2016
|
|
|
|
|
10.3#
|
|
|
S-1/A
|
|
333-211555
|
|
10.4
|
|
6/8/2016
|
|
|
|
|
10.4#
|
|
|
S-1
|
|
333-211555
|
|
10.5
|
|
5/24/2016
|
|
|
|
|
10.6(a)†
|
|
|
S-1
|
|
333-211555
|
|
10.7(a)
|
|
5/24/2016
|
|
|
|
|
10.6(b)†
|
|
|
S-1
|
|
333-211555
|
|
10.7(b)
|
|
5/24/2016
|
|
|
|
|
10.6(c)†
|
|
|
S-1
|
|
333-211555
|
|
10.7(c)
|
|
5/24/2016
|
|
|
|
|
10.6(d)†
|
|
|
S-1
|
|
333-211555
|
|
10.7(d)
|
|
5/24/2016
|
|
|
|
|
10.6(e)†
|
|
|
S-1
|
|
333-211555
|
|
10.7(e)
|
|
5/24/2016
|
|
|
|
|
10.7(a)†
|
|
|
S-1
|
|
333-211555
|
|
10.8(a)
|
|
5/24/2016
|
|
|
|
|
10.7(b)†
|
|
|
S-1
|
|
333-211555
|
|
10.8(b)
|
|
5/24/2016
|
|
|
|
|
10.8†
|
|
|
S-1
|
|
333-211555
|
|
10.9
|
|
5/24/2016
|
|
|
|
|
10.9†
|
|
|
S-1
|
|
333-211555
|
|
10.10
|
|
5/24/2016
|
|
|
|
|
10.10†
|
|
|
S-1
|
|
333-211555
|
|
10.11
|
|
5/24/2016
|
|
|
|
|
10.11†
|
|
|
S-1
|
|
333-211555
|
|
10.12
|
|
5/24/2016
|
|
|
|
|
10.12†
|
|
|
S-1
|
|
333-211555
|
|
10.13
|
|
5/24/2016
|
|
|
|
|
10.13
|
|
|
8-K
|
|
001-37798
|
|
10.1
|
|
9/14/2016
|
|
|
|
|
10.14#
|
|
|
S-1
|
|
333-211555
|
|
10.15
|
|
5/24/2016
|
|
|
|
|
10.15#
|
|
|
S-1/A
|
|
333-211555
|
|
10.16
|
|
6/8/2016
|
|
|
|
|
10.16#
|
|
|
S-1/A
|
|
333-211555
|
|
10.17
|
|
6/8/2016
|
|
|
|
|
10.17#
|
|
|
S-1/A
|
|
333-211555
|
|
10.18
|
|
6/8/2016
|
|
|
|
|
10.18#
|
|
|
S-1/A
|
|
333-211555
|
|
10.19
|
|
6/8/2016
|
|
|
|
|
10.19#
|
|
|
S-1/A
|
|
333-211555
|
|
10.20
|
|
6/8/2016
|
|
|
|
|
10.20#
|
|
|
S-1/A
|
|
333-211555
|
|
10.21
|
|
6/8/2016
|
|
|
|
|
10.21#
|
|
|
S-1/A
|
|
333-211555
|
|
10.22
|
|
6/8/2016
|
|
|
|
|
10.22#
|
|
|
S-1/A
|
|
333-211555
|
|
10.23
|
|
6/8/2016
|
|
|
|
|
10.23†
|
|
|
8-K/A
|
|
001-37798
|
|
10.1
|
|
2/14/2017
|
|
|
|
|
10.24†
|
|
|
8-K/A
|
|
001-37798
|
|
10.2
|
|
12/14/2016
|
|
|
|
|
10.25(a)†
|
|
|
8-K/A
|
|
001-37798
|
|
10.3(a)
|
|
12/14/2016
|
|
|
|
|
10.25(b)†
|
|
|
8-K/A
|
|
001-37798
|
|
10.3(b)
|
|
12/14/2016
|
|
|
|
|
10.25(c)†
|
|
|
8-K/A
|
|
001-37798
|
|
10.3(c)
|
|
12/14/2016
|
|
|
|
|
10.26†
|
|
|
10-Q
|
|
001-37798
|
|
10.1
|
|
5/11/2017
|
|
|
|
|
10.28
|
|
|
|
8-K
|
|
001-37798
|
|
10.1
|
|
6/28/2017
|
|
|
|
10.29
|
|
|
|
8-K
|
|
001-37798
|
|
10.2
|
|
6/28/2017
|
|
|
|
10.31†
|
|
|
|
10-Q
|
|
001-37798
|
|
10.6
|
|
8/11/2017
|
|
|
|
10.32†
|
|
|
10-Q
|
|
001-37798
|
|
10.7
|
|
8/11/2017
|
|
|
|
|
10.33
|
|
|
8-K
|
|
001-37798
|
|
10.1
|
|
9/13/2017
|
|
|
|
|
10.34
|
|
|
8-K
|
|
001-37798
|
|
10.1
|
|
10/26/2017
|
|
|
|
|
10.35
|
|
|
10-Q
|
|
001-37798
|
|
10.3
|
|
11/7/2017
|
|
|
|
|
10.4
|
|
|
S-1/A
|
|
333-211555
|
|
10.1
|
|
6/20/2016
|
|
|
|
|
21.1
|
|
|
S-1
|
|
333-211555
|
|
21.1
|
|
5/24/2016
|
|
|
|
|
23.1
|
|
|
|
|
|
|
|
|
|
|
*
|
|
|
31.1
|
|
|
|
|
|
|
|
|
|
|
*
|
|
|
31.2
|
|
|
|
|
|
|
|
|
|
|
*
|
|
|
32.1
|
|
|
|
|
|
|
|
|
|
|
**
|
|
|
32.2
|
|
|
|
|
|
|
|
|
|
|
**
|
|
|
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
|
|
XBRL Taxonomy Extension Presentation Linkbase Document
|
|
|
|
|
|
|
|
|
|
*
|
|
|
December 31,
|
|
December 31,
|
||||
|
|
2017
|
|
2016
|
||||
|
|
|
|
|
||||
|
Assets
|
|
|
|
||||
|
Current assets:
|
|
|
|
||||
|
Cash and cash equivalents
|
$
|
70,622
|
|
|
$
|
58,656
|
|
|
Short-term deposits and investments
|
25,940
|
|
|
25,485
|
|
||
|
Restricted cash
|
76
|
|
|
78
|
|
||
|
Accounts receivable
|
63
|
|
|
215
|
|
||
|
Prepaid expenses and other current assets
|
1,979
|
|
|
2,382
|
|
||
|
Total current assets
|
98,680
|
|
|
86,816
|
|
||
|
Property and equipment, net
|
2,091
|
|
|
2,047
|
|
||
|
Restricted cash and other deposits
|
329
|
|
|
316
|
|
||
|
Other assets
|
—
|
|
|
122
|
|
||
|
Total assets
|
$
|
101,100
|
|
|
$
|
89,301
|
|
|
Liabilities and stockholders’ equity
|
|
|
|
||||
|
Current liabilities:
|
|
|
|
||||
|
Accounts payable
|
$
|
1,606
|
|
|
$
|
3,882
|
|
|
Accrued expenses
|
8,580
|
|
|
3,921
|
|
||
|
Loans payable, current portion
|
—
|
|
|
4,067
|
|
||
|
Deferred revenue, current portion
|
787
|
|
|
1,836
|
|
||
|
Total current liabilities
|
10,973
|
|
|
13,706
|
|
||
|
Non‑current liabilities:
|
|
|
|
||||
|
Deferred rent and lease incentive
|
151
|
|
|
222
|
|
||
|
Loans payable, net of current portion
|
21,042
|
|
|
7,977
|
|
||
|
Deferred revenue, net of current portion
|
15,919
|
|
|
12,439
|
|
||
|
Other long‑term liabilities
|
1,201
|
|
|
—
|
|
||
|
Total liabilities
|
49,286
|
|
|
34,344
|
|
||
|
Commitments and contingencies (Notes 8 and 13)
|
|
|
|
||||
|
Stockholders’ equity:
|
|
|
|
||||
|
Preferred stock, $0.0001 par value; 10,000,000 shares authorized; no shares issued and outstanding at December 31, 2017 and December 31, 2016, respectively
|
—
|
|
|
—
|
|
||
|
Common stock, $0.0001 par value; 200,000,000 shares authorized; 22,343,254 and 18,438,742 shares issued and outstanding as of December 31, 2017 and December 31, 2016, respectively
|
3
|
|
|
1
|
|
||
|
Additional paid-in capital
|
273,128
|
|
|
211,125
|
|
||
|
Receivable from stock option exercises
|
—
|
|
|
(75
|
)
|
||
|
Accumulated deficit
|
(216,897
|
)
|
|
(151,576
|
)
|
||
|
Accumulated other comprehensive loss
|
(4,420
|
)
|
|
(4,518
|
)
|
||
|
Total stockholders’ equity
|
51,814
|
|
|
54,957
|
|
||
|
Total liabilities and stockholders’ equity
|
$
|
101,100
|
|
|
$
|
89,301
|
|
|
|
Year Ended December 31,
|
||||||||||
|
|
2017
|
|
2016
|
|
2015
|
||||||
|
|
|
|
|
|
|
||||||
|
Grant and collaboration revenue
|
$
|
207
|
|
|
$
|
8,083
|
|
|
$
|
6,011
|
|
|
Operating expenses:
|
|
|
|
|
|
||||||
|
Research and development
|
45,165
|
|
|
29,702
|
|
|
22,980
|
|
|||
|
General and administrative
|
18,826
|
|
|
13,051
|
|
|
8,335
|
|
|||
|
Total operating expenses
|
63,991
|
|
|
42,753
|
|
|
31,315
|
|
|||
|
Loss from operations
|
(63,784
|
)
|
|
(34,670
|
)
|
|
(25,304
|
)
|
|||
|
Investment income
|
617
|
|
|
234
|
|
|
171
|
|
|||
|
Loss on extinguishment of debt
|
(673
|
)
|
|
—
|
|
|
—
|
|
|||
|
Foreign currency transaction gain (loss), net
|
(123
|
)
|
|
(525
|
)
|
|
933
|
|
|||
|
Interest expense
|
(1,206
|
)
|
|
(1,253
|
)
|
|
(948
|
)
|
|||
|
Other income (expense), net
|
(152
|
)
|
|
4
|
|
|
(26
|
)
|
|||
|
Net loss
|
(65,321
|
)
|
|
(36,210
|
)
|
|
(25,174
|
)
|
|||
|
Other comprehensive loss:
|
|
|
|
|
|
||||||
|
Foreign currency translation adjustment
|
78
|
|
|
504
|
|
|
(1,110
|
)
|
|||
|
Unrealized gain (loss) on securities
|
20
|
|
|
(36
|
)
|
|
—
|
|
|||
|
Total comprehensive loss
|
$
|
(65,223
|
)
|
|
$
|
(35,742
|
)
|
|
$
|
(26,284
|
)
|
|
|
|
|
|
|
|
||||||
|
Net loss
|
$
|
(65,321
|
)
|
|
$
|
(36,210
|
)
|
|
$
|
(25,174
|
)
|
|
Accretion of redeemable convertible preferred stock
|
—
|
|
|
(4,566
|
)
|
|
(7,335
|
)
|
|||
|
Net loss attributable to common stockholders
|
$
|
(65,321
|
)
|
|
$
|
(40,776
|
)
|
|
$
|
(32,509
|
)
|
|
|
|
|
|
|
|
||||||
|
Net loss per share attributable to common stockholders:
|
|
|
|
|
|
||||||
|
Basic and diluted
|
$
|
(3.20
|
)
|
|
$
|
(3.89
|
)
|
|
$
|
(15.13
|
)
|
|
Weighted average common shares outstanding:
|
|
|
|
|
|
||||||
|
Basic and diluted
|
20,425,050
|
|
|
10,493,939
|
|
|
2,150,422
|
|
|||
|
|
Series A
|
|
Series B
|
|
Series C
|
|
Series D
|
|
Series SRN
|
|
Series E
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||||||||||||||||||||||||||||||||
|
|
redeemable
|
|
redeemable
|
|
redeemable
|
|
redeemable
|
|
redeemable
|
|
redeemable
|
|
|
|
|
|
|
|
|
|
|
Accumulated
|
|
|
|||||||||||||||||||||||||||||||||||||
|
|
convertible
|
|
convertible
|
|
convertible
|
|
convertible
|
|
convertible
|
|
convertible
|
|
|
|
|
Additional
|
|
Stock
|
|
|
|
other
|
|
|
|||||||||||||||||||||||||||||||||||||
|
|
preferred stock
|
|
preferred stock
|
|
preferred stock
|
|
preferred stock
|
|
preferred stock
|
|
preferred stock
|
|
Common stock
|
|
paid‑In
|
|
option
|
|
Accumulated
|
|
comprehensive
|
|
Stockholders’
|
||||||||||||||||||||||||||||||||||||||
|
|
Shares
|
Amount
|
|
Shares
|
Amount
|
|
Shares
|
Amount
|
|
Shares
|
Amount
|
|
Shares
|
Amount
|
|
Shares
|
Amount
|
|
Shares
|
Amount
|
|
Capital
|
|
receivable
|
|
deficit
|
|
loss
|
|
Equity (Deficit)
|
|||||||||||||||||||||||||||||||
|
Balance at December 31, 2014
|
2,589,868
|
|
$
|
3,493
|
|
|
7,437,325
|
|
$
|
20,533
|
|
|
5,000,002
|
|
$
|
19,270
|
|
|
8,099,994
|
|
$
|
40,570
|
|
|
2,111,109
|
|
$
|
10,167
|
|
|
—
|
|
$
|
—
|
|
|
2,123,997
|
|
$
|
—
|
|
|
$
|
1
|
|
|
$
|
—
|
|
|
$
|
(83,880
|
)
|
|
$
|
(3,876
|
)
|
|
$
|
(87,755
|
)
|
|
Vesting of restricted common stock
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
7,688
|
|
—
|
|
|
23
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
23
|
|
||||||||||||
|
Issuance of common stock upon exercise of options
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
41,714
|
|
—
|
|
|
86
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
86
|
|
||||||||||||
|
Stock‑based compensation expense
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
1,125
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
1,125
|
|
||||||||||||
|
Accretion of preferred stock to redemption value
|
—
|
|
151
|
|
|
—
|
|
915
|
|
|
—
|
|
908
|
|
|
—
|
|
2,332
|
|
|
—
|
|
1,915
|
|
|
—
|
|
1,114
|
|
|
—
|
|
—
|
|
|
(4,881
|
)
|
|
—
|
|
|
(2,454
|
)
|
|
—
|
|
|
(7,335
|
)
|
||||||||||||
|
Issuance of Series E redeemable convertible preferred stock, net of issuance costs of $213,469
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
8,888,888
|
|
36,114
|
|
|
—
|
|
—
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
—
|
|
||||||||||||
|
Issuance of common stock warrants
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
3,647
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
3,647
|
|
||||||||||||
|
Currency translation adjustment
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
(1,110
|
)
|
|
(1,110
|
)
|
||||||||||||
|
Net loss
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
|
—
|
|
|
(25,174
|
)
|
|
—
|
|
|
(25,174
|
)
|
||||||||||||
|
Balance at December 31, 2015
|
2,589,868
|
|
$
|
3,644
|
|
|
7,437,325
|
|
$
|
21,448
|
|
|
5,000,002
|
|
$
|
20,178
|
|
|
8,099,994
|
|
$
|
42,902
|
|
|
2,111,109
|
|
$
|
12,082
|
|
|
8,888,888
|
|
$
|
37,228
|
|
|
2,173,399
|
|
$
|
—
|
|
|
$
|
1
|
|
|
$
|
—
|
|
|
$
|
(111,508
|
)
|
|
$
|
(4,986
|
)
|
|
$
|
(116,493
|
)
|
|
Vesting of restricted common stock
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
8,535
|
|
—
|
|
|
21
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
21
|
|
||||||||||||
|
Issuance of common stock upon exercise of options
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
71,816
|
|
—
|
|
|
224
|
|
|
(75
|
)
|
|
—
|
|
|
—
|
|
|
149
|
|
||||||||||||
|
Stock‑based compensation expense
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
2,030
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
2,030
|
|
||||||||||||
|
Accretion of preferred stock to redemption value
|
—
|
|
75
|
|
|
—
|
|
449
|
|
|
—
|
|
446
|
|
|
—
|
|
1,131
|
|
|
—
|
|
913
|
|
|
—
|
|
1,552
|
|
|
—
|
|
—
|
|
|
(708
|
)
|
|
—
|
|
|
(3,858
|
)
|
|
—
|
|
|
(4,566
|
)
|
||||||||||||
|
Exercise of common warrants
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
572,003
|
|
—
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
—
|
|
||||||||||||
|
Conversion of convertible stock upon listing
|
(2,589,868
|
)
|
(3,719
|
)
|
|
(7,437,325
|
)
|
(21,897
|
)
|
|
(5,000,002
|
)
|
(20,624
|
)
|
|
(8,099,994
|
)
|
(44,033
|
)
|
|
(2,111,109
|
)
|
(12,995
|
)
|
|
(8,888,888
|
)
|
(38,780
|
)
|
|
10,126,118
|
|
1
|
|
|
142,047
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
142,048
|
|
||||||||||||
|
Issuance of common stock, Initial public offering net of issuance costs
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
5,289,633
|
|
—
|
|
|
64,465
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
64,465
|
|
||||||||||||
|
Issuance of common stock, license agreement
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
197,238
|
|
—
|
|
|
2,743
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
2,743
|
|
||||||||||||
|
Conversion of series D preferred stock warrants into warrants for the purchase of common stock
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
189
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
189
|
|
||||||||||||
|
Conversion of series E preferred stock warrants into warrants for the purchase of common stock
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
113
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
113
|
|
||||||||||||
|
Currency translation adjustment
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
504
|
|
|
504
|
|
||||||||||||
|
Unrealized gains (losses) on securities
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
(36
|
)
|
|
(36
|
)
|
||||||||||||
|
Net loss
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
|
—
|
|
|
(36,210
|
)
|
|
—
|
|
|
(36,210
|
)
|
||||||||||||
|
Balance at December 31, 2016
|
—
|
|
$
|
—
|
|
|
—
|
|
$
|
—
|
|
|
—
|
|
$
|
—
|
|
|
—
|
|
$
|
—
|
|
|
—
|
|
$
|
—
|
|
|
—
|
|
$
|
—
|
|
|
18,438,742
|
|
$
|
1
|
|
|
$
|
211,125
|
|
|
$
|
(75
|
)
|
|
$
|
(151,576
|
)
|
|
$
|
(4,518
|
)
|
|
$
|
54,957
|
|
|
Issuance of common stock under Employee Stock Purchase Plan
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
16,263
|
|
—
|
|
|
180
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
180
|
|
||||||||||||||||||||||||
|
Issuance of common stock upon exercise of options
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
269,842
|
|
—
|
|
|
630
|
|
|
75
|
|
|
—
|
|
|
—
|
|
|
705
|
|
||||||||||||
|
Stock‑based compensation expense
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
4,080
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
4,080
|
|
||||||||||||
|
Issuance of common stock, license agreement
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
529,616
|
|
—
|
|
|
10,000
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
10,000
|
|
||||||||||||
|
Issuance of common stock, Private placement net of issuance costs
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
3,088,791
|
|
2
|
|
|
47,113
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
47,115
|
|
||||||||||||
|
Currency translation adjustment
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
78
|
|
|
78
|
|
||||||||||||
|
Unrealized gains (losses) on securities
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
|
—
|
|
|
—
|
|
|
20
|
|
|
20
|
|
||||||||||||
|
Net loss
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
—
|
|
|
—
|
|
|
—
|
|
|
(65,321
|
)
|
|
—
|
|
|
(65,321
|
)
|
||||||||||||
|
Balance at December 31, 2017
|
—
|
|
$
|
—
|
|
|
—
|
|
$
|
—
|
|
|
—
|
|
$
|
—
|
|
|
—
|
|
$
|
—
|
|
|
—
|
|
$
|
—
|
|
|
—
|
|
$
|
—
|
|
|
22,343,254
|
|
$
|
3
|
|
|
$
|
273,128
|
|
|
$
|
—
|
|
|
$
|
(216,897
|
)
|
|
$
|
(4,420
|
)
|
|
$
|
51,814
|
|
|
|
Year Ended December 31,
|
||||||||||
|
|
2017
|
|
2016
|
|
2015
|
||||||
|
|
|
|
|
|
|
||||||
|
Cash flows from operating activities
|
|
|
|
|
|
||||||
|
Net loss
|
$
|
(65,321
|
)
|
|
$
|
(36,210
|
)
|
|
$
|
(25,174
|
)
|
|
Adjustments to reconcile net loss to net cash used in operating activities:
|
|
|
|
|
|
||||||
|
Depreciation
|
750
|
|
|
802
|
|
|
1,044
|
|
|||
|
Amortization of premiums and accretion of discounts on investments
|
233
|
|
|
193
|
|
|
—
|
|
|||
|
Loss on disposal of fixed assets
|
36
|
|
|
3
|
|
|
—
|
|
|||
|
Stock‑based compensation expense
|
4,081
|
|
|
2,051
|
|
|
1,125
|
|
|||
|
Non‑cash interest expense
|
390
|
|
|
263
|
|
|
198
|
|
|||
|
Loss on extinguishment of debt
|
673
|
|
|
—
|
|
|
—
|
|
|||
|
Change in fair value of redeemable convertible preferred stock warrant
|
—
|
|
|
12
|
|
|
(83
|
)
|
|||
|
Changes in operating assets and liabilities:
|
|
|
|
|
|
||||||
|
Accounts receivable
|
152
|
|
|
610
|
|
|
(153
|
)
|
|||
|
Prepaid expenses and other assets
|
525
|
|
|
(860
|
)
|
|
(1,011
|
)
|
|||
|
Restricted cash and other deposits
|
689
|
|
|
103
|
|
|
977
|
|
|||
|
Accounts payable
|
(2,327
|
)
|
|
2,686
|
|
|
667
|
|
|||
|
Deferred revenue
|
2,432
|
|
|
10,409
|
|
|
(507
|
)
|
|||
|
Contingently repayable grant funding
|
—
|
|
|
(461
|
)
|
|
(805
|
)
|
|||
|
Accrued expenses and other liabilities
|
5,650
|
|
|
716
|
|
|
1,259
|
|
|||
|
Net cash used in operating activities
|
(52,037
|
)
|
|
(19,683
|
)
|
|
(22,463
|
)
|
|||
|
Cash flows from investing activities
|
|
|
|
|
|
||||||
|
Maturities of short-term government obligations
|
60,158
|
|
|
6,900
|
|
|
—
|
|
|||
|
Purchase of short-term investments
|
(61,527
|
)
|
|
(28,416
|
)
|
|
(3,516
|
)
|
|||
|
Purchases of property and equipment
|
(733
|
)
|
|
(586
|
)
|
|
(1,163
|
)
|
|||
|
Proceeds from the sale of property and equipment
|
4
|
|
|
2
|
|
|
—
|
|
|||
|
Net cash used in investing activities
|
(2,098
|
)
|
|
(22,100
|
)
|
|
(4,679
|
)
|
|||
|
Cash flows from financing activities
|
|
|
|
|
|
||||||
|
Proceeds from issuance of long-term debt, net of expenses
|
20,957
|
|
|
—
|
|
|
6,674
|
|
|||
|
Repayments of long-term debt
|
(12,934
|
)
|
|
—
|
|
|
(2,336
|
)
|
|||
|
Proceeds from issuance of convertible note
|
—
|
|
|
—
|
|
|
7,092
|
|
|||
|
Proceeds from Initial Public Offering, net of underwriters' discounts and commissions
|
—
|
|
|
68,870
|
|
|
—
|
|
|||
|
Deferred IPO costs paid
|
—
|
|
|
(4,103
|
)
|
|
(302
|
)
|
|||
|
Proceeds from Private Placement, net of issuance costs ($2.9 million)
|
47,114
|
|
|
—
|
|
|
—
|
|
|||
|
Proceeds from issuance of common stock
|
10,000
|
|
|
2,743
|
|
|
—
|
|
|||
|
Proceeds from exercise of stock options
|
706
|
|
|
149
|
|
|
109
|
|
|||
|
Proceeds from issuance of common stock under Employee Stock Purchase Plan
|
180
|
|
|
—
|
|
|
—
|
|
|||
|
Net proceeds from issuance of preferred stock and warrants
|
—
|
|
|
—
|
|
|
32,669
|
|
|||
|
Net cash provided by financing activities
|
66,023
|
|
|
67,659
|
|
|
43,906
|
|
|||
|
Effect of exchange rate changes on cash
|
78
|
|
|
443
|
|
|
(1,019
|
)
|
|||
|
Net increase in cash and cash equivalents
|
11,966
|
|
|
26,319
|
|
|
15,745
|
|
|||
|
Cash and cash equivalents at beginning of period
|
58,656
|
|
|
32,337
|
|
|
16,592
|
|
|||
|
Cash and cash equivalents at end of period
|
$
|
70,622
|
|
|
$
|
58,656
|
|
|
$
|
32,337
|
|
|
Supplement cash flow information
|
|
|
|
|
|
||||||
|
Cash paid for interest
|
$
|
905
|
|
|
$
|
972
|
|
|
$
|
531
|
|
|
Noncash investing and financing activities
|
|
|
|
|
|
||||||
|
Purchase of property and equipment not yet paid
|
$
|
103
|
|
|
$
|
147
|
|
|
$
|
—
|
|
|
Unrealized gain on marketable securities
|
$
|
20
|
|
|
$
|
(36
|
)
|
|
$
|
—
|
|
|
Venture debt termination fee liability
|
$
|
—
|
|
|
$
|
—
|
|
|
$
|
270
|
|
|
Issuance of preferred warrants in connection with venture loans
|
$
|
—
|
|
|
$
|
—
|
|
|
$
|
137
|
|
|
Reclassification of deferred IPO costs from non-current assets to additional paid-in capital
|
$
|
—
|
|
|
$
|
4,404
|
|
|
$
|
—
|
|
|
Initial public offering costs in accounts payable and accrued liabilities
|
$
|
—
|
|
|
$
|
122
|
|
|
$
|
1,246
|
|
|
Accrued dividends and accretion of preferred stock to redemption value
|
$
|
—
|
|
|
$
|
4,566
|
|
|
$
|
7,335
|
|
|
Conversion of bridge loans into Series E preferred
|
$
|
—
|
|
|
$
|
—
|
|
|
$
|
7,288
|
|
|
|
Foreign currency translation adjustment
|
|
Unrealized gains (losses) on available-for-sale securities
|
|
Accumulated other comprehensive income (loss)
|
||||||
|
Balance at December 31, 2014
|
$
|
(3,876
|
)
|
|
$
|
—
|
|
|
$
|
(3,876
|
)
|
|
Other comprehensive loss during the year
|
(1,110
|
)
|
|
—
|
|
|
(1,110
|
)
|
|||
|
Balance at December 31, 2015
|
$
|
(4,986
|
)
|
|
$
|
—
|
|
|
$
|
(4,986
|
)
|
|
Other comprehensive income (loss) during the year
|
504
|
|
|
(36
|
)
|
|
468
|
|
|||
|
Balance at December 31, 2016
|
$
|
(4,482
|
)
|
|
$
|
(36
|
)
|
|
$
|
(4,518
|
)
|
|
Other comprehensive income during the year
|
78
|
|
|
20
|
|
|
98
|
|
|||
|
Balance at December 31, 2017
|
$
|
(4,404
|
)
|
|
$
|
(16
|
)
|
|
$
|
(4,420
|
)
|
|
|
December 31, 2017
|
||||||||||||||
|
|
Amortized Cost
|
|
Gross Unrealized Gains
|
|
Gross Unrealized Losses
|
|
Estimated Fair Value
|
||||||||
|
U.S. government agency bonds
|
$
|
12,798
|
|
|
$
|
—
|
|
|
$
|
(10
|
)
|
|
$
|
12,788
|
|
|
Corporate bonds
|
13,158
|
|
|
—
|
|
|
(6
|
)
|
|
13,152
|
|
||||
|
Total available-for-sale marketable securities
|
$
|
25,956
|
|
|
$
|
—
|
|
|
$
|
(16
|
)
|
|
$
|
25,940
|
|
|
|
December 31, 2016
|
||||||||||||||
|
|
Amortized Cost
|
|
Gross Unrealized Gains
|
|
Gross Unrealized Losses
|
|
Estimated Fair Value
|
||||||||
|
Corporate bonds
|
$
|
24,821
|
|
|
$
|
17
|
|
|
$
|
(53
|
)
|
|
$
|
24,785
|
|
|
Total available-for-sale marketable securities
|
$
|
24,821
|
|
|
$
|
17
|
|
|
$
|
(53
|
)
|
|
$
|
24,785
|
|
|
|
December 31, 2017
|
|
December 31, 2016
|
||||||||||||
|
|
Fair Value
|
|
Amortized Cost
|
|
Fair Value
|
|
Amortized Cost
|
||||||||
|
Less than one year
|
$
|
25,940
|
|
|
$
|
25,956
|
|
|
$
|
24,785
|
|
|
$
|
24,821
|
|
|
|
Year Ended December 31,
|
||||||||||
|
|
2017
|
|
2016
|
|
2015
|
||||||
|
Numerator:
|
|
|
|
|
|
||||||
|
Net loss
|
$
|
(65,321
|
)
|
|
$
|
(36,210
|
)
|
|
$
|
(25,174
|
)
|
|
Less: accretion on preferred stock
|
—
|
|
|
(4,566
|
)
|
|
(7,335
|
)
|
|||
|
Net loss attributable to common stockholders
|
$
|
(65,321
|
)
|
|
$
|
(40,776
|
)
|
|
$
|
(32,509
|
)
|
|
Denominator:
|
|
|
|
|
|
||||||
|
Weighted‑average common shares outstanding—basic and diluted
|
20,425,050
|
|
|
10,493,939
|
|
|
2,150,422
|
|
|||
|
Net loss per share attributable to common stockholders—basic and diluted
|
$
|
(3.20
|
)
|
|
$
|
(3.89
|
)
|
|
$
|
(15.13
|
)
|
|
|
Year Ended December 31,
|
|||||||
|
|
2017
|
|
2016
|
|
2015
|
|||
|
Stock options to purchase common stock
|
2,657,187
|
|
|
2,128,346
|
|
|
1,569,379
|
|
|
Stock warrants to purchase common stock
|
176,432
|
|
|
97,302
|
|
|
650,618
|
|
|
Redeemable convertible preferred stock
|
—
|
|
|
—
|
|
|
9,890,580
|
|
|
Redeemable convertible preferred stock warrants
|
—
|
|
|
—
|
|
|
26,832
|
|
|
Total
|
2,833,619
|
|
|
2,225,648
|
|
|
12,137,409
|
|
|
|
December 31, 2017
|
||||||||||||||
|
|
(Level 1)
|
|
(Level 2)
|
|
(Level 3)
|
|
Total
|
||||||||
|
Cash equivalents:
|
|
|
|
|
|
|
|
||||||||
|
Money market funds
|
$
|
39,478
|
|
|
$
|
—
|
|
|
$
|
—
|
|
|
$
|
39,478
|
|
|
U.S. government agency bonds
|
—
|
|
|
1,000
|
|
|
—
|
|
|
1,000
|
|
||||
|
Total cash equivalents
|
$
|
39,478
|
|
|
$
|
1,000
|
|
|
$
|
—
|
|
|
$
|
40,478
|
|
|
Short-term investments:
|
|
|
|
|
|
|
|
||||||||
|
Corporate bonds
|
$
|
13,152
|
|
|
$
|
—
|
|
|
$
|
—
|
|
|
$
|
13,152
|
|
|
U.S. government agency bonds
|
—
|
|
|
12,788
|
|
|
—
|
|
|
12,788
|
|
||||
|
Total short-term investments
|
$
|
13,152
|
|
|
$
|
12,788
|
|
|
$
|
—
|
|
|
$
|
25,940
|
|
|
|
December 31, 2016
|
||||||||||||||
|
|
(Level 1)
|
|
(Level 2)
|
|
(Level 3)
|
|
Total
|
||||||||
|
Cash equivalents:
|
|
|
|
|
|
|
|
||||||||
|
Money market funds
|
$
|
183
|
|
|
$
|
—
|
|
|
$
|
—
|
|
|
$
|
183
|
|
|
Tri-party repurchase agreements
|
—
|
|
|
27,000
|
|
|
—
|
|
|
27,000
|
|
||||
|
Total cash equivalents
|
$
|
183
|
|
|
$
|
27,000
|
|
|
$
|
—
|
|
|
$
|
27,183
|
|
|
Short-term investments:
|
|
|
|
|
|
|
|
||||||||
|
Corporate bonds
|
$
|
24,785
|
|
|
$
|
—
|
|
|
$
|
—
|
|
|
$
|
24,785
|
|
|
Total short-term investments
|
$
|
24,785
|
|
|
$
|
—
|
|
|
$
|
—
|
|
|
$
|
24,785
|
|
|
|
December 31,
|
|
December 31,
|
||||
|
|
2017
|
|
2016
|
||||
|
Laboratory equipment
|
$
|
5,138
|
|
|
$
|
4,713
|
|
|
Computer equipment and software
|
480
|
|
|
562
|
|
||
|
Leasehold improvements
|
278
|
|
|
222
|
|
||
|
Furniture and fixtures
|
235
|
|
|
226
|
|
||
|
Office equipment
|
118
|
|
|
64
|
|
||
|
Total property and equipment
|
6,249
|
|
|
5,787
|
|
||
|
Less accumulated depreciation
|
(4,158
|
)
|
|
(3,740
|
)
|
||
|
Property and equipment, net
|
$
|
2,091
|
|
|
$
|
2,047
|
|
|
|
December 31,
|
|
December 31,
|
||||
|
|
2017
|
|
2016
|
||||
|
Payroll and employee related expenses
|
$
|
1,902
|
|
|
$
|
1,551
|
|
|
Current portion of deferred rent and lease incentive
|
72
|
|
|
29
|
|
||
|
Collaboration and licensing
|
1,020
|
|
|
—
|
|
||
|
Accrued patent fees
|
268
|
|
|
415
|
|
||
|
Accrued external research and development costs
|
3,578
|
|
|
794
|
|
||
|
Accrued professional and consulting services
|
859
|
|
|
459
|
|
||
|
Accrued grant refund
|
175
|
|
|
152
|
|
||
|
Accrued interest
|
89
|
|
|
81
|
|
||
|
Other
|
617
|
|
|
440
|
|
||
|
Accrued expenses
|
$
|
8,580
|
|
|
$
|
3,921
|
|
|
Year ended December 31,
|
|
||
|
2018
|
$
|
1,437
|
|
|
2019
|
1,482
|
|
|
|
2020
|
375
|
|
|
|
Total minimum lease payments
|
$
|
3,294
|
|
|
2018
|
$
|
1,065
|
|
|
2019
|
4,535
|
|
|
|
2020
|
9,093
|
|
|
|
2021
|
8,665
|
|
|
|
2022
|
1,753
|
|
|
|
Total minimum debt payments
|
$
|
25,111
|
|
|
Less: Amount representing interest
|
(3,061
|
)
|
|
|
Less: Debt discount and deferred charges
|
(1,008
|
)
|
|
|
Less: Current portion of loans payable
|
—
|
|
|
|
Loans payable, net of current portion
|
$
|
21,042
|
|
|
|
Period ending
|
||||
|
|
December 31, 2017
|
|
December 31, 2016
|
||
|
Exercise of common warrants
|
176,432
|
|
|
97,302
|
|
|
Shares available for future stock incentive awards
|
923,440
|
|
|
939,317
|
|
|
Outstanding common stock options
|
2,657,187
|
|
|
2,128,346
|
|
|
Total
|
3,757,059
|
|
|
3,164,965
|
|
|
|
Year Ended December 31,
|
||||||||||
|
|
2017
|
|
2016
|
|
2015
|
||||||
|
Risk-free interest rate
|
2.03
|
%
|
|
1.42
|
%
|
|
1.79
|
%
|
|||
|
Dividend yield
|
—
|
|
|
—
|
|
|
—
|
|
|||
|
Expected term
|
5.90
|
|
|
6.04
|
|
|
6.02
|
|
|||
|
Expected volatility
|
84.52
|
%
|
|
94.97
|
%
|
|
79.80
|
%
|
|||
|
Weighted-average fair value of common stock
|
$
|
15.32
|
|
|
$
|
13.25
|
|
|
$
|
7.35
|
|
|
|
|
Year Ended December 31,
|
|||||||
|
|
|
2017
|
|
2016
|
|
2015
|
|||
|
Risk‑free interest rate
|
|
—
|
|
|
2.06
|
%
|
|
1.57
|
%
|
|
Dividend yield
|
|
—
|
|
|
—
|
|
|
—
|
|
|
Expected term
|
|
0.0
|
|
|
8.80
|
|
|
6.46
|
|
|
Expected volatility
|
|
—
|
|
|
87.33
|
%
|
|
98.18
|
%
|
|
|
|
|
|
|
Weighted‑average
|
|
|
|||||
|
|
|
|
|
|
remaining
|
|
Aggregate
|
|||||
|
|
Number of
|
|
Weighted-average
|
|
contractual term
|
|
intrinsic value
|
|||||
|
|
options
|
|
exercise price ($)
|
|
(in years)
|
|
(in thousands)
|
|||||
|
Employee Awards
|
|
|
|
|
|
|
|
|||||
|
Outstanding at December 31, 2016
|
1,809,945
|
|
|
$
|
7.57
|
|
|
7.26
|
|
$
|
17,459
|
|
|
Granted
|
882,900
|
|
|
$
|
15.32
|
|
|
|
|
|
||
|
Exercised
|
(203,378
|
)
|
|
$
|
2.54
|
|
|
|
|
|
||
|
Forfeited
|
(78,230
|
)
|
|
$
|
14.72
|
|
|
|
|
|
||
|
Outstanding at December 31, 2017
|
2,411,237
|
|
|
$
|
10.58
|
|
|
7.50
|
|
$
|
4,729
|
|
|
Vested at December 31, 2017
|
1,094,117
|
|
|
$
|
6.80
|
|
|
5.76
|
|
$
|
4,215
|
|
|
Vested and expected to vest at December 31, 2017
|
2,232,527
|
|
|
$
|
10.31
|
|
|
7.37
|
|
$
|
4,729
|
|
|
|
|
|
|
|
|
|
|
|||||
|
Non‑Employee Awards
|
|
|
|
|
|
|
|
|||||
|
Outstanding at December 31, 2016
|
318,342
|
|
|
$
|
4.55
|
|
|
5.96
|
|
$
|
4,044
|
|
|
Granted
|
—
|
|
|
$
|
—
|
|
|
|
|
|
||
|
Exercised
|
(67,392
|
)
|
|
$
|
3.97
|
|
|
|
|
|
||
|
Forfeited
|
(5,000
|
)
|
|
$
|
23.95
|
|
|
|
|
|
||
|
Outstanding at December 31, 2017
|
245,950
|
|
|
$
|
4.32
|
|
|
5.10
|
|
$
|
1,351
|
|
|
Vested at December 31, 2017
|
207,502
|
|
|
$
|
3.82
|
|
|
4.53
|
|
$
|
1,243
|
|
|
Vested and expected to vest at December 31, 2017
|
245,950
|
|
|
$
|
4.32
|
|
|
5.10
|
|
$
|
1,351
|
|
|
Fair value of common stock
|
$13.08
|
-
|
$18.02
|
|
|
Risk-free interest rate
|
0.79%
|
-
|
1.19%
|
|
|
Expected volatility
|
46.73%
|
-
|
75.78%
|
|
|
Expected term
|
0.1
|
-
|
0.5
|
|
|
Dividend yield
|
—
|
-
|
—
|
|
|
|
Year Ended December 31,
|
||||||||||
|
|
2017
|
|
2016
|
|
2015
|
||||||
|
Research and development
|
$
|
1,779
|
|
|
$
|
1,183
|
|
|
$
|
495
|
|
|
General and administrative
|
2,302
|
|
|
847
|
|
|
630
|
|
|||
|
Total
|
$
|
4,081
|
|
|
$
|
2,030
|
|
|
$
|
1,125
|
|
|
•
|
First Acquisition Right. During the period beginning on May 1, 2017 and ending on June 1, 2017, Spark had the right (the “First Acquisition Right”) to purchase a number of shares of common stock equal to an aggregate price of
$5.0 million
. See "Spark Letter Agreement" below.
|
|
•
|
Second Acquisition Right. During the period beginning on October 1, 2017 and ending on November 1, 2017, Spark had the right (the “Second Acquisition Right”) to purchase a number of shares of common stock equal to an aggregate price of
$5.0 million
. On October 31, 2017 Spark exercised this right and purchased
205,254
shares of common stock from the Company for
$5.0 million
, or
$24.36
per share of common stock. The purchase price per share represents an amount equal to
115.0%
of the average daily VWAP of the common stock during the
thirty
consecutive calendar days leading up to and ending on the day prior to the Second Acquisition Right notification date.
|
|
|
Year Ended December 31,
|
|||||||
|
|
2017
|
|
2016
|
|
2015
|
|||
|
Tax at U.S. statutory rate
|
34.0
|
%
|
|
34.0
|
%
|
|
34.0
|
%
|
|
Changes from statutory rate:
|
|
|
|
|
|
|||
|
State taxes, net of federal benefit
|
5.8
|
%
|
|
5.8
|
%
|
|
5.7
|
%
|
|
Permanent items
|
(0.1
|
)%
|
|
(1.1
|
)%
|
|
(0.7
|
)%
|
|
Research tax credits/other
|
0.5
|
%
|
|
1.3
|
%
|
|
1.0
|
%
|
|
Change in enacted rates
|
(35.8
|
)%
|
|
—
|
%
|
|
—
|
%
|
|
Valuation allowance, net
|
(6.7
|
)%
|
|
(39.8
|
)%
|
|
(40.0
|
)%
|
|
Other
|
2.3
|
%
|
|
(0.2
|
)%
|
|
—
|
%
|
|
Effective income tax rate
|
—
|
%
|
|
—
|
%
|
|
—
|
%
|
|
|
December 31,
|
||||||
|
(In thousands)
|
2017
|
|
2016
|
||||
|
Deferred tax assets
|
|
|
|
||||
|
Net operating loss carryforwards
|
$
|
44,146
|
|
|
$
|
39,420
|
|
|
Research and development credits
|
4,092
|
|
|
3,052
|
|
||
|
Stock-based compensation expense
|
959
|
|
|
904
|
|
||
|
Deferred rent and other expenses
|
263
|
|
|
713
|
|
||
|
Deferred revenue
|
4,021
|
|
|
5,607
|
|
||
|
Patent costs/amortization
|
4,264
|
|
|
4,934
|
|
||
|
Total deferred tax assets
|
57,745
|
|
|
54,630
|
|
||
|
|
|
|
|
||||
|
Deferred tax liabilities
|
|
|
|
||||
|
Depreciation
|
$
|
(108
|
)
|
|
$
|
(131
|
)
|
|
Debt discount
|
—
|
|
|
(69
|
)
|
||
|
Unrealized foreign exchange gain
|
—
|
|
|
(1,525
|
)
|
||
|
Total deferred tax liabilities
|
(108
|
)
|
|
(1,725
|
)
|
||
|
Net deferred tax assets
|
$
|
57,637
|
|
|
$
|
52,905
|
|
|
Valuation allowance
|
(57,637
|
)
|
|
(52,905
|
)
|
||
|
Net deferred tax assets
|
$
|
—
|
|
|
$
|
—
|
|
|
|
|
Three Months Ended (unaudited)
|
||||||||||||||
|
|
|
March 31,
|
|
June 30,
|
|
September 30,
|
|
December 31,
|
||||||||
|
|
|
2017
|
|
2017
|
|
2017
|
|
2017
|
||||||||
|
Grant and collaboration revenue
|
|
$
|
137
|
|
|
$
|
26
|
|
|
$
|
27
|
|
|
$
|
17
|
|
|
Operating expenses
|
|
$
|
14,919
|
|
|
$
|
15,897
|
|
|
$
|
13,881
|
|
|
$
|
19,294
|
|
|
Net loss
|
|
$
|
(15,134
|
)
|
|
$
|
(15,967
|
)
|
|
$
|
(14,676
|
)
|
|
$
|
(19,544
|
)
|
|
Net loss attributable to common stockholders
|
|
$
|
(15,134
|
)
|
|
$
|
(15,967
|
)
|
|
$
|
(14,676
|
)
|
|
$
|
(19,544
|
)
|
|
|
|
|
|
|
|
|
|
|
||||||||
|
Net loss per share attributable to common stockholders, basic and diluted
|
|
$
|
(0.82
|
)
|
|
$
|
(0.85
|
)
|
|
$
|
(0.66
|
)
|
|
$
|
(0.88
|
)
|
|
|
|
|
|
|
|
|
|
|
||||||||
|
|
|
Three Months Ended (unaudited)
|
||||||||||||||
|
|
|
March 31,
|
|
June 30,
|
|
September 30,
|
|
December 31,
|
||||||||
|
|
|
2016
|
|
2016
|
|
2016
|
|
2016
|
||||||||
|
Grant and collaboration revenue
|
|
$
|
2,088
|
|
|
$
|
2,017
|
|
|
$
|
1,048
|
|
|
$
|
2,930
|
|
|
Operating expenses
|
|
$
|
9,029
|
|
|
$
|
8,418
|
|
|
$
|
8,516
|
|
|
$
|
16,790
|
|
|
Net loss
|
|
$
|
(7,476
|
)
|
|
$
|
(6,923
|
)
|
|
$
|
(7,728
|
)
|
|
$
|
(14,083
|
)
|
|
Accretion on preferred stock
|
|
$
|
(2,356
|
)
|
|
$
|
(2,210
|
)
|
|
$
|
—
|
|
|
$
|
—
|
|
|
Net loss attributable to common stockholders
|
|
$
|
(9,832
|
)
|
|
$
|
(9,133
|
)
|
|
$
|
(7,728
|
)
|
|
$
|
(14,083
|
)
|
|
|
|
|
|
|
|
|
|
|
||||||||
|
Net loss per share attributable to common stockholders, basic and diluted
|
|
$
|
(4.52
|
)
|
|
$
|
(2.75
|
)
|
|
$
|
(0.43
|
)
|
|
$
|
(0.77
|
)
|
|
|
|
SELECTA BIOSCIENCES, INC.
|
|
|
|
|
|
|
|
Date: March 15, 2018
|
|
By:
|
/s/ Werner Cautreels, Ph.D.
|
|
|
|
|
Werner Cautreels, Ph.D.
|
|
|
|
|
President and Chief Executive Officer
|
|
Signature
|
Title
|
Date
|
|
|
|
|
|
/s/ Werner Cautreels, Ph.D.
|
President and Chief Executive Officer, and Director
|
March 15, 2018
|
|
Werner Cautreels, Ph.D.
|
(Principal Executive Officer)
|
|
|
|
|
|
|
/s/ John Leaman, M.D.
|
Chief Financial Officer, Head of Corporate Strategy, and Treasurer
|
March 15, 2018
|
|
John Leaman, M.D.
|
(Principal Financial and Accounting Officer)
|
|
|
|
|
|
|
/s/ Timothy C. Barabe
|
Director
|
March 15, 2018
|
|
Timothy C. Barabe
|
|
|
|
|
|
|
|
/s/ Omid Farokhzad, M.D.
|
Director
|
March 15, 2018
|
|
Omid Farokhzad, M.D.
|
|
|
|
|
|
|
|
/s/ Peter Barton Hutt
|
Director
|
March 15, 2018
|
|
Peter Barton Hutt
|
|
|
|
|
|
|
|
/s/ Amir Nashat, Ph.D
|
Director
|
March 15, 2018
|
|
Amir Nashat, Ph.D
|
|
|
|
|
|
|
|
/s/ Aymeric Sallin
|
Director
|
March 15, 2018
|
|
Aymeric Sallin
|
|
|
|
|
|
|
|
/s/ Timothy Springer, Ph.D.
|
Director
|
March 15, 2018
|
|
Timothy Springer, Ph.D.
|
|
|
|
|
|
|
|
/s/ Patrick Zenner
|
Director
|
March 15, 2018
|
|
Patrick Zenner
|
|
|
No information found
* THE VALUE IS THE MARKET VALUE AS OF THE LAST DAY OF THE QUARTER FOR WHICH THE 13F WAS FILED.
| FUND | NUMBER OF SHARES | VALUE ($) | PUT OR CALL |
|---|
| DIRECTORS | AGE | BIO | OTHER DIRECTOR MEMBERSHIPS |
|---|
No information found
No Customers Found
No Suppliers Found
Price
Yield
| Owner | Position | Direct Shares | Indirect Shares |
|---|