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
ECCR - Ecumenical Council for Corporate Responsibility
ECCR is an organisation with representatives of many mainstream Christian denominations whose aim is to raise the profile of corporate responsibility within the churches. The Greenbank team and some of its clients have been able to assist the ECCR in filing a resolution at the Shell AGM in May 2006 addressing the issue of how the company deals with local concerns when entering a new area, with specific reference to projects in Nigeria, Russia and Ireland.

