Grant-making trusts are a key source of funding for charitable activity, and this guide - now in its twelfth edition - has built a reputation as the definitive source of information in this area. It concentrates on the 400 largest trusts that giveMoreGrant-making trusts are a key source of funding for charitable activity, and this guide - now in its twelfth edition - has built a reputation as the definitive source of information in this area. It concentrates on the 400 largest trusts that give over GBP300,000 a year, with a combined grant-making total of around GBP2.4 billion.