Clinical trial failure risk - Phase 2/3 trials may not demonstrate statistical significance on primary endpoints (attack frequency reduction, time to symptom relief), or safety issues could emerge requiring program termination. Historical biotech Phase 3 success rates approximate 50-60%.
Regulatory approval uncertainty - FDA/EMA may require additional studies, reject NDA/MAA filings, or impose restrictive labels limiting commercial potential. Orphan drug designation provides some regulatory tailwinds but does not guarantee approval.
Reimbursement and pricing pressure - Payers increasingly scrutinize rare disease drug pricing despite orphan status. ICER cost-effectiveness reviews and European HTA bodies may limit pricing power below $300K+ annual treatment costs seen in earlier HAE launches.
BioCryst's Orladeyo (oral prophylaxis approved 2020) has first-mover advantage in oral HAE market with growing real-world evidence. Pharvaris must demonstrate superior efficacy or safety to capture share from established competitor.
Pipeline competition from Ionis, KalVista, and Astria Therapeutics developing alternative oral or subcutaneous HAE therapies with potentially differentiated mechanisms. Market may fragment across multiple oral options, limiting individual product penetration.
Cash runway risk - With $100M annual burn and approximately $230M cash (implied from 12.86x current ratio), the company has roughly 18-24 months of runway as of February 2026. Equity raises are likely required before commercialization, creating dilution risk for existing shareholders.
Equity financing risk in adverse market conditions - Biotech IPO/follow-on markets are cyclical. If capital markets deteriorate during cash needs, the company may face severely dilutive financing terms or inability to raise adequate capital.
StructuralCompetitiveBalance Sheet