Skip to content
Strategic Investment Fund
  • Our Portfolio
  • Focus
        • Focus

          Our six domains of focus comprise 40+ program strategies across the foundation’s nearly $9B annual charitable support.

          Explore our focus areas

        • Agriculture & Nutrition
        • Inclusive Financial Systems
        • Healthcare Delivery
        • Life Sciences
        • U.S. Education & Opportunity
        • Women’s Innovation
  • Approach
  • Team
        • Team

          We collaborate with the foundation’s program teams—working side-by-side to identify investment opportunities that produce the greatest impact.

          View our team

        • SIF Team
        • Investment Committee
  • Press
portfolio

Multabody™ Platform for HIV Therapeutics

Radiant Biotherapeutics, a Toronto-based biotechnology company, is developing its Multabody™ platform, which enables multivalent, multispecific antibody targeting within a single molecule and aims to increase potency and breadth relative to traditional monoclonal antibodies. The Foundation’s investment supports development of a preclinical HIV-directed Multabody program, with the potential to improve efficacy and cost-effectiveness for use in low- and middle-income countries.
Website
Focus areas
Life Sciences
Investment type
Direct equity
Status
Active
Initial investment
Series A
Partnered in
2024
Headquarters
USA
Portfolio news
Radiant Bio Closes $35 Million Series A Financing to Advance Therapeutic Pipeline with Its Proprietary Multabody™ Platform

More about our work

Our focus

We embrace science and technology innovations that solve old problems in new ways, challenge status quos, and build on past breakthroughs. Our six domains of focus comprise 40+ program strategies across the foundation’s nearly $9B annual charitable support.

Learn More

Investment Approach

How the Strategic Investment Fund is fostering partnerships with the private sector to leverage the globe’s most groundbreaking global innovations for societal good.

Learn More

Our Team

The SIF Investment Committee brings depth of experience to global investment programs, with a proven track record of innovation across sectors and scale.

Learn More

We are a nonprofit organization fighting poverty, disease and inequality around the world.
  • Portfolio
  • Focus
  • Approach
  • Our Team
  • Press
  • FAQ
  • Be Aware of Fraudulent Activity
  • Privacy & Cookies Notice
  • Terms of Use
© 2025-2026 Gates Foundation. All rights reserved