8-K current report · filed Sep 23, 2026

Arcturus Therapeutics Holdings Inc. (ARCT) 8-K Current Report: September 23, 2026

Item 7.01Item EX-99.1ARCT overview

Short answer

Arcturus Therapeutics Holdings Inc. (ARCT) filed an 8-K current report with the SEC on September 23, 2026 reporting Item 7.01 (Regulation FD Disclosure), Item EX-99.1 (Exhibit EX-99.2). Boilerplate incorporation language for the Company’s Regulation FD disclosure.

Arcturus Therapeutics Holdings Inc. 8-K event analysis

AI summary of each reported item and its exhibits

Item 7.01 · Regulation FD Disclosure

  • Boilerplate incorporation language for the Company’s Regulation FD disclosure
  • No substantive operating, financial, or investor-impacting information in the provided excerpt

Item EX-99.1 · Exhibit EX-99.2

  • ARCT-810 Phase 2 interim data showed favorable safety and improved ammonia and glutamine biomarkers, supporting continued clinical development
  • LUNAR 2.0 delivered 40-fold higher hEPO expression and 38-fold higher hOTC potency than comparators in NHP studies
  • ARCT-2601 expected to enter the ongoing Phase 2 study near year-end 2026, potentially enabling lower or less frequent dosing
  • FDA feedback supports integrating ARCT-2601 into the OTC deficiency trial, but clinical benefit remains unproven
  • Planned October acquisition of myNEO adds AI capabilities for mRNA design and target identification, expanding platform development potential

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