Arcturus Therapeutics Announces Third Quarter 2024 Financial Update and Pipeline Progress

In This Article:

Cystic Fibrosis and OTC Deficiency Phase 2 studies on track for POC data in first half of 2025

$25 Million commercial milestone achieved with first sale of KOSTAIVE® in Japan

KOSTAIVE® European CHMP opinion expected December

Positive results from multiple Phase 3 studies support KOSTAIVE® U.S. BLA filing in H1 2025

Superior 12-month durability results from Phase 3 study of KOSTAIVE® published in The Lancet Infectious Diseases

Positive Phase 3 results showed KOSTAIVE® XBB.1.5. met all four primary study objectives and key secondary objectives

Investor conference call at 4:30 p.m. ET today

SAN DIEGO, November 07, 2024--(BUSINESS WIRE)--Arcturus Therapeutics Holdings Inc. (the "Company", "Arcturus", Nasdaq: ARCT), a commercial messenger RNA medicines company focused on the development of infectious disease vaccines and opportunities within liver and respiratory rare diseases, today announced its financial results for the third quarter ended September 30, 2024, and provided corporate updates.

"I am thrilled about the approval of KOSTAIVE® for the COVID-19 JN.1 strain in Japan and for the continued success of the STARR® platform in multiple Phase 3 trials, underscoring CSL and Arcturus’ commitment to deliver disruptive technologies for protection against respiratory viral diseases," said Joseph Payne, President & CEO of Arcturus Therapeutics. "I am pleased that both of our flagship mRNA therapeutic programs, ARCT-032 and ARCT-810, are on track for interim Phase 2 proof-of-concept clinical data in the first half of 2025. These studies allow us to evaluate lung function improvement in individuals with cystic fibrosis, and meaningful biomarker changes in individuals with OTC deficiency."

"I am happy to report our first commercial milestone achieved from our CSL partnership for the first commercial sale of KOSTAIVE in Japan," said Andy Sassine, Chief Financial Officer of Arcturus. "We anticipate another milestone related to potential European approval in the first quarter of 2025. I am also happy to announce that Arcturus is planning to transfer our cystic fibrosis manufacturing process technology to ARCALIS."

Recent Corporate Highlights

  • In September, Arcturus received clearance of an Investigational New Drug application from the U.S. Food and Drug Administration (FDA), enabling the Company to initiate a Phase 2 multiple ascending dose study to evaluate the safety, tolerability and efficacy of ARCT-032 in people with cystic fibrosis (CF).

    • The Phase 2 study is screening individuals with CF who do not qualify for, or benefit from, CFTR modulator medicines due to dysfunctional or absent CFTR protein and/or drug intolerance.

    • The Company remains on track to share ARCT-032 Phase 2 proof-of-concept (POC) interim data in 1H25.

  • In August, the Company announced the expansion of the Phase 2 clinical program of ARCT-810, an mRNA therapeutic to potentially treat ornithine transcarbamylase (OTC) deficiency, into the United States.

    • This open-label multiple-dose study (NCT06488313) evaluating pharmacodynamics and safety is currently enrolling adults and adolescents requiring clinical management for OTC deficiency.

    • The placebo-controlled Phase 2 European study has completed the dosing phase (N = 8; 0.3 mg/kg) in OTC deficient individuals.

    • The Company remains on track to share ARCT-810 Phase 2 POC interim data from both U.S. and European studies in 1H25.

  • Meiji Seika Pharma, CSL’s exclusive partner in Japan, began KOSTAIVE commercial sales in September 2024. This event triggered a $25 million commercial milestone associated with the first sale of KOSTAIVE® in Japan.

  • In September, the Company, along with partners CSL and Meiji, announced new 12-month post vaccination data for KOSTAIVE at OPTIONS XII for the Control of Influenza conference.

    • The results of a head-to-head study demonstrated that KOSTAIVE maintained superior immunogenicity compared to the conventional mRNA vaccine COMIRNATY® for up to one year against Wuhan-Hu-1, Omicron BA.4/5 and certain other variants, and at one-sixth the dose of the comparator (5 μg vs 30 μg, respectively). The results were published in The Lancet Infectious Disease.

    • Additional Phase 3 data presented by CSL, Meiji and Arcturus show that bivalent KOSTAIVE, ARCT-2301, induced superior immunogenicity over conventional bivalent mRNA vaccine COMIRNATY® that persists against key variants up to six months post vaccination.

  • Earlier this year, CSL Seqirus’s partner Meiji Seika Pharma announced that it submitted a partial change application for an amendment to the manufacturing and marketing approval of KOSTAIVE® to include manufacturing sites in Japan, including ARCALIS, Inc., Arcturus’ manufacturing joint venture in Japan. When approved, Meiji Seika Pharma will begin selling domestically produced KOSTAIVE® this season.

  • The Company announced the results of a Phase 3 study which demonstrated the added value of an updated COVID-19 vaccine (ARCT-2303) containing the Omicron XBB.1.5 variant. The study supports co-administration of KOSTAIVE with licensed influenza vaccines.

    • ARCT-2303 demonstrated superior immune response versus ARCT-154 as measured by neutralizing antibodies against Omicron XBB.1.5.6 in terms of GMT ratio and SCR difference.

    • Co-administration of ARCT-2303 and cell-based quadrivalent influenza vaccine (QIV; FLUCELVAX®, CSL) showed noninferior immune response vs standalone QIV administration.

    • Co-administration of ARCT-2303 and QIV showed noninferior immune response vs standalone ARCT-2303 administration.

    • Co-administration of ARCT-2303 and adjuvanted QIV (FLUAD®, CSL) in older adults showed similar responses vs standalone administration of ARCT-2303 and adjuvanted QIV.