After shelving plans for a Nasdaq listing this summer, Odyssey Therapeutics has turned back to private investors, securing a $213-million series D round to continue advancing its pipeline of autoimmune and inflammatory disease drugs.The Boston-based biotech had filed for a $100-million IPO in January, but withdrew it in June, citing market conditions.With the latest financing, Odyssey has now raised $700 million across four private rounds, following earlier series A, B and C fundings. The new round brought in fresh backers including Affinity Asset Advisors, Dimension Capital, Jeito Capital, Lightspeed Ventures, TPG Life Sciences Innovations and Wedbush Healthcare Partners, alongside all existing investors.Odyssey's lead candidate, OD-07656, is an oral small molecule RIPK2 scaffolding inhibitor. The drug entered a Phase II trial in June testing it in combination with Takeda's Entyvio (vedolizumab) for patients with ulcerative colitis — data are expected in early 2026. Odyssey is also advancing two preclinical programmes: an oral IRAK4 scaffolding inhibitor aimed at blocking inflammatory signalling by the myddosome protein complex found in multiple cell types across tissues; and OD-00910, a monospecific tetravalent V-body intended to agonise TNFR2 selectively on Treg."As we advance our programmes towards important clinical milestones, we’re focused on translating our scientific efforts into meaningful benefit for patients," said Gary Glick, the biotech's founder and CEO.Founded in 2021, Odyssey has forged strategic collaborations with Johnson & Johnson and Terray Therapeutics to accelerate AI-driven small molecule therapeutics development.