Navigator Closes $100M Series A, Targets Autoimmune Market With Potential Best-in-Class Bispecific Antibody

3D illustration of antibodies

3D illustration of antibodies

iStock, Naeblys

Navigator Medicine is looking to push its lead asset NAV-240 targeting immune-mediated diseases through to clinical studies “in the coming months,” which the startup in-licensed from a South Korean biotech for $20 million upfront.

Navigator Medicines on Tuesday announced that it has closed a Series A financing round, with $100 million in proceeds that the startup will use to advance its new in-licensed bispecific antibody NAV-240 for the treatment for autoimmune diseases.

The New Jersey-based biotech, which launched as a subsidiary of Sera Medicines earlier this year, is backed by investment firms RA Capital Management and Forbion. Navigator gained access to NAV-240 in June 2024, when it licensed the candidate from IMBiologics for $20 million upfront and the promise of up to nearly $924.8 million in milestone payments.

Originally named IMB-101, the bispecific antibody is currently in a Phase Ia/Ib study in the U.S. to assess its safety, tolerability and pharmacokinetic and pharmacodynamic profiles, according to the South Korean biotech. Navigator has rights to NAV-240 outside of Asia but including Japan. The startup is also eligible for potential royalties on annual net sales of up to a double-digit percentage.

NAV-240 works by targeting both the OX40L and TNF proteins, which are well-established targets in immune-mediated diseases. On its website, IMBiologics explains that the bispecific antibody modulates the adaptive immune response through OX40L and the innate immunity through TNF. NAV-240 achieves potentially best-in-class outcomes and “superior therapeutic effects compared to Humira,” AbbVie’s blockbuster antirheumatic treatment, according to the company.

Navigator Chief Medical Officer Dana McClintock in a statement said that NAV-240 “has the potential to make an impact on patients living with autoimmune diseases,” adding that the biotech will work to push NAV-240 through to clinical studies “in the coming months.”

“Our Series A funding will be pivotal in accelerating its development alongside other exciting programs within our pipeline,” McClintock said.

As part of the Series A round, Forbion General Partner Wouter Joustra and RA Capital Management Managing Director Andrew Levin will join Navigator’s board of directors.

With $100 million and a new best-in-class candidate, Navigator joins a growing group of young biotechs targeting autoimmune, inflammatory and other immune-mediated diseases. According to Fortune Business Insights, the immunology market is projected to grow to nearly $257.4 billion by 2032.

In June 2024, Santa Ana Bio debuted with $168 million in combined Series A and Series B funding, which it will use to push two programs into the clinic. These two assets are SAB01, a bispecific antibody that inhibits c-Kit in the presence of the second undisclosed target, and SAB03, an anti-PD-1 agent.

In July 2024, three Johnson & Johnson veterans launched Arc Bio with $165 million in an oversubscribed Series A to advance multifunctional antibodies that create immune synapses to either activate or block T-cells. The technology will allow the startup to develop new therapies for inflammatory and immunology conditions.

Tristan is an independent science writer based in Metro Manila, with more than eight years of experience writing about medicine, biotech and science. He can be reached at tristan.manalac@biospace.com, tristan@tristanmanalac.com or on LinkedIn.
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