Company: PGEN
Filing Date: 2025-11-13
Form Type: 10-Q
Source: 0001356090-25-000034
Chunk: 140

Company: PRECIGEN, INC.
Filing Date: 2025-11-13
Form: 10-Q
Item: Part I, Item 2
Chunk 140
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Table of Contents

and potentially life-threatening disease caused by chronic HPV 6 or HPV 11 infection, which results in recurrent benign tumors in the respiratory tract. RRP can lead to severe voice disturbance, a compromised airway, and recurrent post-obstructive pneumonias. Management of RRP has primarily consisted of repeated surgeries, which do not address the root cause of the disease and can be associated with significant morbidity as well as significant patient and health system burden. The approval of Papzimeos marks a historic milestone for the RRP patient community as the first and only FDA-approved therapy for the treatment of adults with RRP. As a result of Papzimeos receiving full FDA approval, a confirmatory clinical trial is no longer required.

Papzimeos is a non-replicating adenoviral vector-based immunotherapy designed to express a fusion antigen comprising selected regions of HPV types 6 and 11 proteins—the root cause of RRP. Papzimeos is delivered via four subcutaneous injections over a 12-week interval. Papzimeos approval is supported by safety and efficacy data from the pivotal Phase 1/2 clinical trial published in the Lancet Respiratory Medicine. The pivotal study successfully met its primary safety and pre-specified primary efficacy endpoints. Papzimeos was well-tolerated with no dose-limiting toxicities and no treatment-related adverse events greater than Grade 2. 51% (18 out of 35) of study patients achieved Complete Response, requiring no surgeries in the 12 months after treatment with Papzimeos. These Complete Responses remained durable for over 12 months. Complete responses have been durable after Papzimeos treatment with median follow-up of 36 months as of a September 19, 2025 data cutoff. 

PRGN-2012 had been granted Breakthrough Therapy Designation and Orphan Drug designation for the treatment of RRP by the FDA. In addition, PRGN-2012 has received Orphan Drug Designation for the Treatment of RRP from the European Commission as well.

PRGN-2009 is an investigational AdenoVerse immunotherapy designed to activate the immune system to recognize and target human papillomavirus-positive, or HPV+, solid tumors. PRGN-2009 leverages our UltraVector and AdenoVerse platforms to optimize HPV type 16 ("HPV 16") and HPV type 18 ("HPV 18"), antigen designed for delivery via a proprietary gorilla adenovector with