Rathbone Greenbank Investments works with many other organisations and groups committed to ethical investment, or more generally to sustainable development and social justice, through membership, partnership, and sponsorship. These include the following:
- UKSIF – the UK Social Investment Forum
- ECCR - Ecumenical Council for Corporate Responsibility
- Schumacher UK
- Resurgence
- The Funding Network
- Triodos Bank
- NEF - New Economics Foundation
- SCC - Stop Climate Chaos coalition
- EIA – the Ethical Investment Association
- The Gaia Partnership
- CAF - Charities Aid Foundation
- Claros