Korean company Hanmi Pharmaceutical has signed a licence and collaboration agreement with US-based Rapt Therapeutics for a cancer drug candidate, FLX475, in Asia.

The deal provides Hanmi with exclusive rights to develop and commercialise the cancer asset in South Korea and China, including Taiwan and Hong Kong.

Discover B2B Marketing That Performs

Combine business intelligence and editorial excellence to reach engaged professionals across 36 leading media platforms.

Find out more

FLX475 is an oral, small molecule antagonist of C-C Motif Chemokine Receptor 4 (CCR4). It selectively inhibits the passage of regulatory T cells (Treg) into tumours and not healthy tissues.

The mechanism is expected to restore natural anti-tumour response and boost the different standard and immune-based treatments, including chemotherapy, radiation and checkpoint inhibitors.

Currently, Rapt Therapeutics is conducting a Phase I / II clinical trial of the drug candidate as monotherapy and in combination with pembrolizumab for the treatment of ‘charged’ tumours.

Data from the Phase II part of the study are set to be available in the first half of next year.

GlobalData Strategic Intelligence

US Tariffs are shifting - will you react or anticipate?

Don’t let policy changes catch you off guard. Stay proactive with real-time data and expert analysis.

By GlobalData

The deal is intended to boost Hanmi’s immuno-oncology portfolio with the addition of FLX475, while RAPT will be able to enter the Asian market.

Hanmi Pharmaceutical CEO Se-Chang Kwon said: “We are actively building our immuno-oncology portfolio, and see FLX475 as a potential keystone in our effort to deliver new safe and effective cancer therapeutics to patients who need them.

“This compound complements our current product portfolio and has the potential to address a large and growing population of patients suffering from cancers that are prevalent in Asian countries.”

Under the agreement, Hanmi will pay Rapt Therapeutics $10m in terms of upfront and near-term milestone payments.

Furthermore, Rapt Therapeutics will get up to $48m in development milestones and up to $60m in sales milestones. The company is also eligible for royalties on sales of FLX475 in the stated regions.

Hanmi will support Rapt Therapeutics’ Phase I / II study via its clinical trial infrastructure in Korea and China. The company will also perform a Phase II study of FLX475 in gastric cancer patients in these countries.

Pharmaceutical Technology Excellence Awards - Nominations Closed

Nominations are now closed for the Pharmaceutical Technology Excellence Awards. A big thanks to all the organisations that entered – your response has been outstanding, showcasing exceptional innovation, leadership, and impact.

Excellence in Action
Awarded the 2025 Pharmaceutical Technology Excellence Award for Business Expansion in Integrated Manufacturing, Upperton Pharma Solutions is rapidly expanding its UK GMP and sterile manufacturing footprint. Find out how Upperton’s integrated CDMO model helps pharma companies move from early development to clinical and niche commercial supply with fewer handovers and faster timelines.

Discover the Impact