Harbour BioMed & Kelun-Biotech License TSLP Antibody to Windward Bio

Harbour BioMed, a global biopharmaceutical company, and Sichuan Kelun Biotech BioPharmaceutical have entered into a license agreement with Windward Bio AG for HBM9378/SKB378, an anti-thymic stromal lymphopoietin (TSLP) fully human monoclonal antibody co-developed by Harbour BioMed and Kelun-Biotech.

Under the terms of the agreement, Windward Bio is granted an exclusive license to research, develop, manufacture, and commercialize HBM9378/SKB378 globally, excluding Greater China and several Southeast and West Asian countries. In return, Harbour BioMed and Kelun-Biotech are eligible to receive a total of up to $970 million upfront and milestone payments, as well as tiered royalties ranging from single to double digits on net sales. The $45 million upfront and near-term milestone payments include both cash payment and an equity interest in Windward Bio’s parent company.

Furthermore, Harbour BioMed and Kelun-Biotech are eligible to receive additional payments if Windward Bio undergoes a near-term change of control or enters into a sublicense agreement with a third party. All payments under the license agreement shall be paid in equal amounts to Harbour BioMed and Kelun-Biotech.

In connection with the license agreement, Windward Bio announced a $200 million Series A financing round led by OrbiMed, Novo Holdings, and Blue Owl Healthcare Opportunities, along with co-investors SR One, Omega Funds, RTW Investments, Qiming Venture Partners, Quan Capital, and Pivotal bioVenture Partners.

“We are delighted to partner with Windward Bio to advance the development of HBM9378/SKB378, a promising TSLP-targeted fully human antibody with significant potential to address immunological diseases,” said Dr. Jingsong Wang, Founder, Chairman & CEO of Harbour BioMed. “This collaboration demonstrates the value of our Harbour Mice technology platform and reflects our commitment to bring transformative treatments to patients worldwide.”