According to the following website:
Of the top 100 National Universities and top 100 National Liberal Arts Colleges, here are the ones with at least 10% of their alumni who go on to be among the top 1% and at least 25% of their alumni who go on to be among the top 5%.
It should be noted that in many instances, those universities have many students who come from very wealthy families to begin with. It should also be noted that some of those have very large, very prominent undergraduate business programs.
University of Pennsylvania 23%, 46%
Princeton University 23%, 45%
Stanford University 21%, 43%
Harvard University 21%, 42%
Massachusetts Institute of Technology 20%, 49%
Duke University 20%, 44%
Georgetown University 18%, 41%
Babson College 18%, 47%
Yale University 18%, 40%
Dartmouth College 18%, 39%
Columbia University 17%, 38%
Cornell University 14%, 39%
California Institute of Technology 14%, 38%
Carnegie Mellon University 13%, 37%
Northwestern University 14%, 35%
Amherst College 14%, 34%
Brown University 14%, 32%
Washington and Lee University 13%, 38%
University of Notre Dame 13%, 37%
Johns Hopkins University 13%, 34%
Colgate University 13%, 33%
Emory University 13%, 33%
Williams College 13%, 29%
Claremont McKenna College 12%, 33%
Vanderbilt University 12%, 33%
Harvey Mudd College 11%, 37%
Boston College 11%, 32%
Tufts University 11%, 32%
University of Chicago 11%, 29%
Middlebury College 11%, 28%
Pomona College 11%, 26%
Rice University 10%, 35%
Villanova University 10%, 34%
Wake Forest University 10%, 33%
Bucknell University 10%, 32%
Washington University-St Louis 10%, 31%
University of California-Berkeley 10%, 31%
University of Virginia 10%, 31%
University of Michigan-Ann Arbor 10%, 30%
Trinity College 10%, 29%