Ribo Life Science Licenses $4.4 Billion MASH siRNA Portfolio to Madrigal Pharmaceuticals

Suzhou Ribo Life Science Co., Ltd. (HKG: 6938) has entered a landmark licensing agreement with Madrigal Pharmaceuticals, Inc. (NASDAQ: MDGL), the global leader in metabolic dysfunction-associated steatohepatitis (MASH) therapeutics, to jointly develop six innovative siRNA therapies leveraging Ribo’s proprietary liver-targeting RiboGalSTAR platform. The deal, valued at up to USD 4.4 billion, represents one of the largest RNA therapeutic partnerships in the rapidly expanding MASH market.

Transaction Structure

ElementDetail
LicensorSuzhou Ribo Life Science Co., Ltd. (HKG: 6938)
LicenseeMadrigal Pharmaceuticals, Inc. (NASDAQ: MDGL)
Technology PlatformRiboGalSTAR – Liver-targeting siRNA delivery system
AssetsSix preclinical siRNA therapies (single-target and dual-target)
Rights GrantedGlobal exclusive R&D and commercialization rights
Upfront PaymentUSD 60 million
Total Deal ValueUp to USD 4.4 billion (upfront + milestones)
MilestonesClinical development, regulatory approvals, commercial sales
RoyaltiesTiered royalties on global net sales

Technology Platform: RiboGalSTAR

FeatureRiboGalSTAR SpecificationStrategic Advantage
Target OrganLiver-specific deliveryAddresses MASH pathophysiology at disease site
MechanismsiRNA (small interfering RNA) – gene silencingDurable, reversible knockdown of disease-driving genes
Galactose TargetingASGPR (asialoglycoprotein receptor) mediated uptakeHigh hepatocyte specificity; reduced off-target effects
Single/Dual TargetMulti-gene silencing capabilitySynergistic efficacy; resistance prevention

Strategic Rationale & Market Context

FactorStrategic Analysis
MASH Market Scale>$20 billion by 2030; resmetirom (Rezdiffra) first approved 2024; massive unmet need for combination and next-generation therapies
Madrigal LeadershipResmetirom FDA approval establishes MASH commercial infrastructure; siRNA pipeline complements small molecule franchise for combination strategies
Ribo Platform Validation$4.4 billion deal validates RiboGalSTAR as best-in-class liver-targeting siRNA technology; China-to-global biotech success story
siRNA MASH DifferentiationGene silencing offers disease-modifying potential vs. symptomatic management; quarterly dosing possible vs. daily oral resmetirom
Competitive LandscapeArrowhead, Alnylam, Ionis pursuing MASH siRNA; Ribo-Madrigal partnership creates formidable challenger with combined expertise

Development & Commercial Outlook

PhaseActivityTimeline
CurrentTechnology transfer; lead candidate selection from 6-asset portfolio2026
PreclinicalIND-enabling studies; GLP toxicology2026-2027
ClinicalPhase I/II MASH trials (combination with resmetirom potential)2027-2028
RegulatoryNDA submissions; global commercialization2029+
RoyaltiesRevenue participation based on Madrigal global salesCommercial launch

Forward‑Looking Statements
This brief contains forward‑looking statements regarding Ribo Life Science siRNA clinical development, Madrigal Pharmaceuticals’ MASH market expansion, and RiboGalSTAR platform validation in liver diseases. Actual results may differ due to siRNA delivery efficiency challenges, combination therapy safety profiles, and competitive dynamics with Arrowhead and Alnylam in MASH.-Fineline Info & Tech