spread out over the years, some of it recent, much of it going back over a decade or so. I don't know how fully up to date it is. They appear to get their hugest chunks of funding from extremely wealthy conservative families and individuals, and other conservative foundations and institutions.
http://mediamattersaction.org/transparency/organization/The_Heritage_Foundation/fundershttp://mediamattersaction.org/transparency/organization/The_Heritage_Foundation/connectionsThe corporate funding seems a little harder to get at (and I found opensecrets.org not at all useful for this when I tried a quick search to see what might be there), but there is this in the overview at the same site above:
In addition to individual contributions, The Heritage Foundation receives funding from a variety of corporations and associations, including AIG, Altria Group (Philip Morris), Lockheed Martin, and ExxonMobil. Since President Obama took office, Heritage has been critical of the administration's priorities, including global warming legislation and health care reform.