Phio Pharmaceuticals
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Phio Pharmaceuticals (PHIO) investor relations material

Phio Pharmaceuticals Corporate presentation summary

Complete event summary combining all related documents: earnings call transcript, report, and slide presentation.
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Corporate presentation summary24 Feb, 2026

Value proposition and market opportunity

  • Targets cutaneous squamous cell carcinoma (cSCC), the second most common solid tumor, with ~1.8M annual cases and a $20B addressable market.

  • Current treatment regimens for cSCC are unsatisfactory, with mortality rates approaching those of melanoma.

  • No FDA-approved drug therapy exists for early-stage cSCC; invasive surgery is the standard of care.

  • PH-762 and PH-894 programs address significant unmet needs in oncology, with additional potential in autoimmune and cosmetic indications.

Technology and intellectual property

  • INTASYL® siRNA technology enables precise gene silencing, reactivating immune cells to kill tumor cells.

  • Patented asymmetric siRNA duplex design enhances specificity, stability, and delivery to target cells.

  • 54 patents issued, with protection extending to 2044, covering chemistry, compounds, gene targets, and indications.

  • Platform versatility allows targeting of multiple genes relevant to oncology, autoimmune, and cosmetic applications.

Clinical development and results

  • PH-762 (PD-1 silencer) completed a Phase 1b dose-escalation trial in cSCC, with 22 patients treated.

  • Final cohort showed 85% pathological response and 100% tumor clearance in 4 of 6 responders.

  • No immune-related or treatment-limiting toxicities observed across five dose cohorts, even at 20-fold dose escalation.

  • PH-894 (BRD4 silencer) completed IND-enabling studies, showing dual action (tumor killing and immune activation) and a clean toxicology profile.

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Next Phio Pharmaceuticals earnings date

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Q4 202530 Mar, 2026
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