Poplar Therapeutics Raises $50M Series A

The funding will support the development of its lead anti-IgE program and the delivery of Phase 1 results later this year.

Written by Mia Goulart
Published on Jan. 07, 2026
A medical form labeled "FOOD ALLERGY" is surrounded by pills, syringes, a stethoscope, and a pen, conveying a clinical and informative tone.
Photo: Shutterstock
REVIEWED BY
Rose Velazquez | Jan 07, 2026

Boston-based clinical-stage immunology company Poplar Therapeutics, formerly known as Phylaxis Bioscience, has raised $50 million in a Series A financing round led by SR One, Vida Ventures and Platanus.

In a statement released Wednesday, Poplar Therapeutics said millions of patients with atopic diseases lack effective treatments due to elevated IgE levels, but it is developing a new class of anti-IgE therapies for food allergies and other atopic conditions, using the funding to advance its lead program and provide Phase 1 results later this year.

Founder Tony Yao said in a statement that the company’s lead candidate, PHB-050, reflects two decades of scientific progress in the field.

“Preclinical data suggest PHB-050 can not only bind and block soluble IgE but can also rapidly drive total IgE toward zero. With PHB-050, our goal is to enable the effective treatment of all patients, including those with highly elevated IgE levels who cannot be treated with existing therapies,” Yao said.

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