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Investors

Investor Resources

Transfer Agent and Registrar

American Stock Transfer & Trust Company
6201 15th Avenue
Brooklyn, NY 11219
Phone: 800-937-5449

Independent Registered Public Accounting Firm

KPMG LLC
Philadelphia, PA

Stock Listing

The company’s common stock trades on NYSE American under the symbol PTN.

For Institutional Investors and Media

Paul Arndt, MBA
LifeSci Advisors, LLC
Email: Paul@LifeSciAdvisors.com
Phone: 646-597-6992

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