Anthony Marucci
Analyst · Cantor Fitzgerald. Your line is now open
Thank you, Sarah. Good afternoon everyone and thank you for joining us. On today’s call we will update you on our clinical programs, outline key milestones for the remainder of the year and then Sam Martin will review financial results. As always, we look forward to answering your questions at the close of the call. We will start first with glembatumumab vedotin, our lead ADC currently in the company sponsored studies in both triple negative breast cancer and metastatic melanoma. As previously disclosed, enrolment in METRIC study in triple negative breast cancer was completed in August 2017 with 327 patients on study. Given the inherent challenges in recruiting an enriched patient population, especially within an orphan indication, achieving this milestone was a significant accomplishment. We are also very grateful to physician and patients who participated in the METRIC study and are hopeful that glemba will be able to offer patients, families and care givers a potentially new option and indication where there are so few therapies and none that target gpNMB, which is associated with a more aggressive form of the disease. In total, we enrolled patients across 120 sites in the U.S., EU, Canada and Australia. We were pleased to see that our screening outcomes were consistent with our prior experience. Approximately 50% of the patients we screened for the METRIC study met the 25% or greater gpNMB threshold. The primary end point of the studies progression free survival or PFS, which is defined as the time from randomizations to the earlier of disease progression or death due to any cause. The primary end point analysis is based on reaching 203 events and will be assessed by an independent central read of patient scans. You may recall in the Phase 2 immerse study which was conducted in our later stage patient population, glemba PFS in subset of patients with high gpNMB expressing triple negative breast cancer was 3.5 months. The comparative on in the METRIC study is Xeloda, also known by the generic name capecitabine, which has a reported PFS of 1.7 months to 2.5 months for patient populations similar to METRIC. We believe glemba is well positioned for success, particularly in these studies that do no select the gpNMB expression, which has been shown to correlate with reduced PFS and survival of breast cancer. From a statistical perspective the METRIC study is powered at 85% to detect a hazard ratio of less than or equal to 0.64 for the primary PFS endpoint. The totality of the data including secondary end points of response rate, overall survival, duration of response and safety will be important in assessing clinical benefit. The 203rd progression event required for a valuation of the prior end point that has been reached and filing data cleaning is ongoing and preparation for data lock and analysis. As we reaffirmed in our filings this afternoon, we remain on track to report top line primary end point data from the METRIC study in the second quarter of 2018. The successful METRIC is a study with potential registration in both the U.S. and EU. Importantly, we plan to seek input from the health authorities on our submission plans as their feedback will be important and prioritizing and to finding next steps and the associated timelines. These submissions will be supported by a companion diagnostic and a fully validated commercial manufacturing process. As we have previous discussed, commercial manufacturing for an ADC is considerably more involved and more expensive of that of a typical antibody and we made the decision to stage the most costly work in these areas, estimated at an incremental spend of approximately $35 million to begin after we have data in hand. While this stuff will extend the timeline to complete our regulatory submissions, we believe this is the most prudent use of our funds as we seek to advance our pipeline overall. Assuming positive data, we plan to work with the FDA on a regulatory strategy that will support submitting a Biological License Application or BLA in the second half of 2019. As we have stated in the past, we remain open to the possibility of bringing on a partner for glemba who could help maximize the opportunity across multiple indications and geographies and we believe the staged approach we’ve outlined on the manufacturing and diagnostics supports us. We have completed a number of important steps to support this work. We have established a commercial manufacturing supply chain, a monoclonal antibody intermediate, the antibody drug substance and the antibody drug product at commercial scale. Each of these steps will require Process Performance Qualification or PPQ to support the manufacturing portion of the BLA. We had manufacturing slots identified with our commercial manufactures and with positive top line data we will quickly move forward with PPQ planning and execution. We continue to work closely with our preferred diagnostic partner on the commercial diagnostic test and plant to meet with the FDA to discuss transition from a current lab based test and additional activates needed to support a PMA submission by a diagnostic partner in line with the BLA submission for glemba. We continue to believe based on key opinion leader, a Physician Advisory Board feedback that glemba’s mechanism of action, its unique gpNMB target and the clinical evidence to-date will support a differentiated product and a robust market for glemba. Again, we look forward to update in the next question and our hopeful that glemba will offer patients, families and care givers a potential new option in the state of disease. Behind the METRIC study, glemba is also about being evaluated at Celldex in multi-cohort Phase 2 study in patient with check point refractory metastatic melanoma. We presented mature data from the single-agent arm at ASCO in 2017, where we saw a compelling activity including an overall response rate of 11% and a PFS of 4.4 months in heavily-pretreated patients with unresectable stage III or stage IV melanoma who previous failed checkpoint immunotherapy and BRAF or MEK targeted therapies. Importantly, what stood out to us in this study was the waterfall plot where more than 50% of the patients experienced tumor shrinkage with a number of these patients coming very close to the resist responses. Our goal in the combination cohorts we are conducting is to see if we can tip these patients into formal responses, increasing the overall robustness of the data. To this end, we have added a number of combination arms including our CD27 agonist, Varlilumab, which reported data assets in 2017 with checkpoint inhibitors which very recently completed enrolment and with CDX-301, our dendritic cells gross factor which is currently enrolling patients. As data emerges, we will be a position to determine next steps and look forward to sharing this with you. Moving to varli, in January as planned we completed enrolment across all cohorts in the Phase 2 study of varli in combination with Opdivo that we are conducting in collaboration with BMS. In total, the Phase 2 portion of this study enrolled 139 patients across five cohorts in colorectal cancer, ovarian cancer, head and neck squamous cell carcinoma, renal cell carcinoma and glioblastoma. The primary objective of the Phase 2 cohorts’ objective response rate, except for glioblastoma, where the primary objective is the rate of 12 month overall survival. Secondary objectives include a new profiling of patients and their tumors and evaluating alternative dose and schedules of varli. Working with BMS we plan to report data from each cohort at various medical meetings in 2018 beginning this summer. Moving on CDX-014, our ADC that targets TIM-1, enrollment is continuing in our Phase 1 does escalation study. This trail initially enrolled patients with clear cell and papillary renal cell carcinomas. In January we expanded enrolments also to include patients with ovarian clear cell carcinomas, a malignancy where the TIM-1 expression is also up-regulated. The study includes a dose escalation portion across three separate dosing cohorts to determine the maximum tolerated dose, followed by cohorts of up to 15 patients, each to assess the preliminary anti-tumor activity as measuring by overall response. Finally, as we close out 2017 we advance two of our pipeline candidates into new studies. First, we opened enrolment in a Phase 2 study of CDX-3379 in combination with Erbitux in head and neck squamous cell carcinoma. CDX-3379 is a human monoclonal antibody designed to block the activity of ErbB3, which is believed to an important receptor in regulating cancer cell growth and survival, as well as resistance to targeted therapies. It is expressed that many cancers including head and neck, thyroid, breast, lung and gastric cancers, as well as melanoma. We believe the proposed mechanism of action of CDX-3379 sets it apart from other drugs and development in its class due to the ability to block both ligand-independent and ligand-dependent ErbB3 signaling binding to a unique epitope. This Phase 2 study is an open label trail in combination with Erbitux and approximately 30 patients with HPV negative Erbitux resistance, advanced head and neck squamous cell carcinoma. Patients must have been treated previous with an anti-PD-L1 checkpoint inhibitor, a population with limited options and a particularly poor prognosis. This study employs a two stage Simon design and the primary objective of the study is objective response rate. To advance to the second stage we much observe one objective response in the first 13 patients. We also initiated the Phase 1 study of CDX-1140. The 1140 is a fully human antibody targeted to CD40, a key activator of immune response which is found on dendritic cells, macrophages and B cells and is also expressed on many cancer cells. Potent CD agonist antibodies have shown encouraging results in early clinical studies; however, systemic toxicity associated with broad CD40 activation has limited their dosing. We believe that CDX-1140 has unique properties relative to other CD40 agonist antibodies. This agonist activity does not require cross linking through FC receptor interaction, allowing more consistent and controlled immune cell activation. Also we observed strong synergy with CD40 ligand that may potentiate the agonist activity near activated T cells in lymph nodes and tumors. Finally, CDX-1140 has a remarkably good safety profile while demonstrated potent immune activation in our preclinical studies. This Phase 1 study which is expected to enroll up to approximately 105 patients with recurrent locally advanced or metastatic cancers, the desire to determine the maximum tolerated dose during a dose escalation phase and to recommend doses for further study in a subsequent expansion phase. During the dose escalation phase, patients will receive CDX-1140 at dose levels ranging from 0.01 mg/kg to 3.0 mg/kg, once every four weeks until disease progression or intolerance. The expansion phase is designed to further evaluate the tolerability and biological effects of selected doses of CDX-1140 in specific tumor types. This program has evolved nicely and we think we are in good position to initiate combination cohorts later this year. Behind these programs we continue to advance our anti KIT program. We anticipate manufacturing and IND enabling efforts for CDX-0159 will be completed this year and will enter the clinic in 2019. We also continue to advance the TAM program comprised of targets Tyro3, AXL and MerTK, which has potentially broad applications in oncology, inflammation and infectious diseases and are growing by a specific antibody program. With that, I will ask Sam to report on the financials and then we will outline the minestrones for 2018 and open up the call for questions. Sam.