# Yvonne Greenstreet

> Yvonne Greenstreet is the Cambridge-based chief executive of Alnylam Pharmaceuticals. Born in London and raised in Ghana and the UK, she joined Alnylam as COO in 2016 and became CEO in January 2022 after senior roles at GSK and Pfizer. Her public leadership philosophy emphasizes listening, diverse perspectives and teamwork; her honors include a 2025 OBE and the 2026 Golden Door Award.

- **Role:** Chief Executive Officer at Alnylam Pharmaceuticals
- **Organizations:** Alnylam Pharmaceuticals, The American Funds, Council on Foreign Relations, Biomedical Science Careers Program, GlaxoSmithKline (former), Pfizer (former)
- **From:** London, United Kingdom
- **Nationality:** British
- **Education:** Bachelor of Medicine and Bachelor of Surgery, University of Leeds, MBA, INSEAD
- **Known for:** Led development of Alnylam commercial capabilities as COO., HBA credits her with raising $2.2 billion over five years., HBA Woman of the Year, 2024.

## Career timeline

- **1992** — Joined Glaxo, later part of GSK; spent 18 years with the organization.
- **2004** — Moved to the United States.
- **2016** — Joined Alnylam as Chief Operating Officer.
- **2020** — Became President and Chief Operating Officer of Alnylam.
- **2021** — CEO succession announced; appointment effective January 2022.
- **2022** — Became CEO of Alnylam in January.
- **2024** — Named HBA Woman of the Year.
- **2025** — Appointed OBE.
- **2026** — Received the Golden Door Award in April.

## Achievements

- Led development of Alnylam commercial capabilities as COO.
- HBA credits her with raising $2.2 billion over five years.
- HBA Woman of the Year, 2024.
- Appointed OBE in 2025 for services to the UK/US biotechnology and life sciences industry.
- International Institute of New England Golden Door Award, 2026.

## Latest updates

- **2026-04** — Received the Golden Door Award at IINE’s April 15 gala in Boston.
- **2026-01** — Published a leadership reflection as she began her fifth year as Alnylam CEO.
- **2025-06** — OBE appointment published in the King’s Birthday Honours.

## Links

- Website: https://www.alnylam.com/about-alnylam/alnylam-leadership
- LinkedIn: https://www.linkedin.com/in/dr-yvonne-greenstreet-2b00389

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Profile page: https://yespress.io/yvonne-greenstreet
Published by YesPress — https://yespress.io
Last updated: 2026-10-23