Arizona real estate developer Jerry Bisgrove makes our Big Givers list with the recent announcement in the Arizona Republic that he has pledged $25 million to the Valley of the Sun United Way Foundation. For every dollar pledged to the United Way over the next five years, Bisgrove's Stardust Foundation will give 50 cents up to $25 million. The donation is the third-largest pledge to any United Way in the country. In recent years, Bisgrove has also donated more than $25 million to Science Foundation Arizona and $20 million to the Arizona Family Housing Fund. Bisgrove has also been a member of the United Way Foundation's Tocqueville Society for more than 16 years, a club for those who give over $10,000 each year. His foundation focuses on lower income families and neighborhoods and has also give to the Arizona Humane Society, the YMCA, Habitat for Humanity and the Macehualli Work Center, a day-laborer center. Bisgrove made his money in trucking but is now the chairman and CEO of Stardust Companies which includes Stardust Development, a a real estate land development company, developing approximately 3,000 lots per year.