How The Chronicle Conducted Its Survey of America's Largest Grant Makers

The Chronicle of Philanthropy's annual survey of the nation's largest private foundations is based on information from 187 grant makers.

Much of the information in the survey was compiled from a Chronicle questionnaire, completed by 112 of those foundations. Data on the other foundations come from their informational tax returns, which must be made available to the public.

Assets at 104 of the foundations (those that provided information for the last two years)

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