Jay Luly
Analyst · J.P. Morgan
Thank you, Carol. Good afternoon, everyone, and thank you for joining us today. Enanta is in an exciting period in its development with many milestones and achievements expected in the next several months. And we are in a strong financial position to pursue our ambitious R&D goals. At the end of our June 30 fiscal quarter, we had approximately $235 million in cash and marketable securities. In addition, we earned a total of $65 million in milestone payments, following the approvals of MAVYRET in the EU in July and in the US last week. MAVYRET is AbbVie's new HCV therapy, consisting of the combination of glecaprevir and pibrentasvir or GP. We anticipate GP will achieve commercial regulatory approval in Japan next quarter, which would earn us an additional $15 million milestone payment. We will also continue to earn royalties on AbbVie's net sales of all our collaborations HCV products. With this funding, we are advancing our wholly-owned programs in non-alcoholic steatohepatitis, known as NASH; primary biliary cholangitis, known as PBC; respiratory syncytial virus, known as RSV; and HBV. Our NASH and PBC candidate EDP-305 is a highly selective and potent FXR agonist currently completing a Phase I study. We're aiming to announce data from this study, including pharmacodynamic biomarker data, at AASLD in October. Meanwhile, we're conducting NASH and PBC-enabling clinical studies during the second half of this year. We expect to start a Phase II study in PBC next quarter and we plan to begin a Phase II study in NASH in early 2018. NASH is a complicated disease for which we believe the treatment will likely require a drug regimen using a combination of mechanisms. Our long-term commitment to NASH therapies has led us to conduct additional discovery and preclinical activities, which we hope will provide us a broadening pipeline for NASH and PBC. At Enanta, we're identifying new follow-on FXR-agonist leads, which we will continue to characterize this year, and we will also continue our ongoing discovery work in a non-FXR mechanism for NASH. In addition to NASH, we're very excited about our RSV program and our first clinical candidate for RSV, EDP-938. RSV is a virus that infects the respiratory system and represents a serious unmet medical need in infants and children, as well as in immune-compromised individuals and the elderly. It is estimated that each year between 75,000 and 125,000 children in the US are hospitalized due to RSV infection. There's currently no treatment for this infection. EDP-938, our lead non-fusion inhibitor candidate for RSV, works by blocking the replication of the virus and also has the potential of being effective at later stages of infection. In June, at the 19th International Symposium on Respiratory Viral Infections in Berlin, Enanta presented promising in vitro and in vivo data on EDP-938 in an oral presentation. In vitro data demonstrated that EDP-938 is a potent inhibitor of both RSV-A and RSV-B activity, maintaining any viral activity post-infection while presenting a high barrier to resistance. Further EDP-938 maintained anti-viral potency across all clinical isolates tested as well as against virus that was resistant to fusion inhibitors. The compound inhibited RSV at a post-entry replication step, involving the N protein and maintained its activity in vitro when given 24 hours post-infection. In addition, combination studies of EDP-938 with other types of RSV inhibitors showed synergistic antiviral effects. New in vivo data, consistent with potent inhibition of RSV, were also presented. EDP-938 demonstrated a greater-than-four log reduction in viral load in an animal model challenged with RSV. RSV data is very exciting and we are planning to begin a Phase I clinical study of EDP-938 next quarter. Upon completion of this study, we plan to move directly to a proof of concept challenge study in RSV-infected humans in 2018. In HBV, we continue our efforts to discover, characterize and secure patent protection for new core inhibitors. The estimated 250 million HBV patients worldwide represent a significant medical need that we believe is still largely unmet. In our HCV collaboration, our partner AbbVie has made great progress with its new combination therapy known as MAVYRET, which includes our second protease inhibitor product glecaprevir. In addition to the milestone payments earned for the recent approvals in the US and in the EU, the economics of MAVYRET are significant to Enanta, as the portion of AbbVie's HCV net sales on which we currently earn most of our royalties would increase from 30% for the paritaprevir containing 3-DAA regimen to 50% for the 2-DAA MAVYRET combination. What this would mean for Enanta is that for a given amount of AbbVie's net HCV sales, Enanta's royalties on sales of MAVYRET would increase at least 67% compared to royalties on sales of the existing 3-DAA paritaprevir containing regimens. We continue to be excited about MAVYRET and its therapeutic and commercial potential. MAVYRET is the only once-a-day, pan-genotypic treatment that works in only eight weeks for 80% of the HCV patients in the United States. To sum up, Enanta is well-positioned from a financial and pipeline perspective with several near-term milestones. With $65 million already earned, we expect to earn the entire $80 million in approval milestone payments for MAVYRET in the coming months once it is approved and commercialized in Japan, which will mean that Enanta will have successfully earned every milestone payment in our AbbVie collaboration agreement, not only for our first product, but for our second product as well. We're targeting to announce clinical data from our lead NASH candidate EDP-305 in healthy volunteers and presumed NAFLD subjects at the AASLD meeting in October. We plan to initiate a Phase II study of EDP-305 in PBC next quarter and Phase II study in NASH in early 2018. We're also planning to advance EDP-938, our clinical candidate for RSV into a Phase I trial next quarter. I will now turn the call over to Paul to discuss our financials for the quarter. Paul?