Wealth-X has added to its database nearly 3,000 ultra high net worth individuals whose private philanthropic foundation has more than $25 million in assets under management. Information includes biographies, wealth, motivations, passions and relationships.

The private foundations represent 920 legal entities, a median average of $50 million per organization, and a total of $189 billion in assets under management.

The top four giving categories of the foundations in the database are education, social services, health and environment. Wealth-X created the list of active UHNW philanthropists by analyzing public records, tax documents and media reports.

"The start of 2011 has brought a welcome resurgence among active philanthropists, who are both seeking effective managers and suitable organizations to meet their giving objectives," executive vice president of strategy David Friedman said.