Send him an e-mail describing your passion with this group, and that you know you share this passion. Tell him that you would like to talk with him about it in person. People like to be asked in person to make a contribution, rather than solicited, which is what an e-mail does. Be aware he’s probably hit up for thousands of contributions, and that all wells have bottom. He may prefer to give large amounts to a small pool of charities, or, surprisingly, may choose not to give much at all. Having money does not always equate to financial generosity. It sounds like he’s a better candidate for the board of directors than a donor. In the meantime, are you putting a promotional signature statement on all your personal e-mails? “I’m running in the Great Human Race, and would like you to consider sponsoring me. Please take a moment to check out the organization at____”