Investors Investor Resources Transfer Agent and Registrar Equiniti Trust Company, LLC48 Wall StreetNew York, NY 10005Phone: 800-937-5449 Independent Registered Public Accounting Firm KPMG LLCPhiladelphia, PA Stock Listing The company’s common stock trades on NYSE American under the symbol PTN. For Institutional Investors and Media Paul Arndt, MBALifeSci Advisors, LLCEmail: Paul@LifeSciAdvisors.comPhone: 646-597-6992 Join Our Email List Email I accept the Privacy Policy Submit Unsubscribe Loading...