No. 2: George Mitchell (bequest)
Mr. Mitchell left an estimated $750-million to the Cynthia and George Mitchell Foundation, which he and his late wife established in 1978.
No. 37: Dale and Sarah Ann Fowler
The couple pledged $55-million to Mr. Fowler’s alma mater, Chapman University.
No. 31: Stephen and Nancy Grand
The Grands pledged $50-million last year to the American Committee for the Weizmann Institute of Science.
No. 45: Richard Herman (bequest)
Mr. Herman, who was 100 when he died last year, left the bulk of his estate to two Washington organizations.
No. 46: Raymond and Kathryn Harbert
Mr. and Ms. Harbert pledged $40-million to Auburn University’s College of Business.
No. 10: Jeffrey Carlton (bequest)
Mr. Carlton left about $212-million to a trust that will eventually become the Jeffrey Carlton Charitable Foundation.
Mr. Clark pledged $60-million to Stanford University’s James H. Clark Center for Biomedical Engineering and Sciences, which he helped the university found in 1999 by providing $90-million.
Mr. Bloomberg gave a total of $452-million to arts, education, environment, and public-health nonprofits.
No. 27: John Boruchin (bequest)
Mr. Boruchin, who was 93 when he died in 2012, left about $72-million to the Jewish National Fund.