Poplar Therapeutics vs Pliant Therapeutics
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Raised $95M total ($50M Series A Jan 2026 + $45M extension Mar 2026) from SR One, Vida, RA Capital, Janus Henderson. Triple-action anti-IgE mechanism. Phase 1 data expected H2 2026 for PHB-050.
About
Poplar Therapeutics (formerly Phylaxis Bioscience) raised $95 million in less than 60 days — $50 million in Series A financing in January 2026 from SR One, Vida Ventures, RA Capital, and Janus Henderson, extended by $45 million in March 2026 — reflecting exceptional investor conviction in its PHB-050 anti-IgE program. PHB-050 uses a triple-action anti-IgE mechanism designed to exceed the performance of existing anti-IgE drugs: simultaneously blocking mast cell IgE binding, reducing circulating free IgE, and inhibiting IgE production by B cells. Phase 1 data is expected in the second half of 2026.
Pliant Therapeutics is a clinical-stage biotech (Nasdaq: PLRX) developing integrin inhibitors for fibrotic diseases, with lead program bexotegrast in Phase 2b/3 trials for idiopathic pulmonary fibrosis.
About
Pliant Therapeutics develops small molecule integrin inhibitors targeting the pathological tissue scarring (fibrosis) that drives diseases including idiopathic pulmonary fibrosis (IPF), primary sclerosing cholangitis (PSC), and nonalcoholic steatohepatitis (NASH/MASH). Integrins are cell surface receptors that activate TGF-β, the master regulator of fibrosis — blocking specific integrin subtypes (αvβ6, αvβ1) can halt or reverse fibrosis progression without broadly suppressing immunity.
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