Company: PGEN
Filing Date: 2025-11-13
Form Type: 10-Q
Source: 0001356090-25-000034
Chunk: 62

Company: PRECIGEN, INC.
Filing Date: 2025-11-13
Form: 10-Q
Item: Part I, Item 1
Chunk 62
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otherapy platform and our UltraCAR-T therapeutics platform. Our AdenoVerse immunotherapy platform utilizes a library of proprietary adenovectors for the efficient gene delivery of therapeutic effectors, immunomodulators, and vaccine antigens. We have established proprietary manufacturing cell lines and production methodologies from our AdenoVerse immunotherapy platform, which we believe are scalable for commercial supply. We believe that our proprietary gorilla adenovectors, part of the AdenoVerse technology, have superior performance characteristics as compared to current competition, including standard human adenovirus serotype 5, rare human adenovirus types and other non-human primate adenovirus types.

In August 2025, the FDA granted full approval of Papzimeos for the treatment of adults with RRP. RRP is a rare, debilitating, 

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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