No. 19: Steve and Connie Ballmer
The couple donated $60-million to Harvard University and $50-million to the University of Oregon.
By Maria Di Mento
Senior Editor
No. 14: Marc and Lynne Benioff
The couple gave most of their $154-million in donations to the University of California at San Francisco Benioff Children’s Hospital.
By Maria Di Mento
Senior Editor
Mr. Robertson gave $85-million, most of it to his foundation, which supports cancer research, climate-change groups, and education.
By Maria Di Mento
Senior Editor
No. 8: Rachel Lambert (Bunny) Mellon
Ms. Mellon gave more than $400-million to a foundation named for her father.
By Maria Di Mento
Senior Editor
No. 21: John and Tashia Morgridge
The former chairman of Cisco Systems and his wife pledged $100-million to their alma mater, the University of Wisconsin at Madison.
By Maria Di Mento
Senior Editor
The WhatsApp co-founder gave more than $550-million to the Silicon Valley Community Foundation.
By Maria Di Mento
Senior Editor
The retired orthopedic spinal surgeon pledged $50-million to University of Southern California for research and $15-million to the Found Animals Foundation, which he started in 2005.
By Maria Di Mento
Senior Editor
Mr. Asbjornson pledged $50-million to Montana State University College of Engineering for the construction a new campus and to establish a center for interdisciplinary projects.
By Maria Di Mento
Senior Editor
The Microsoft co-founder gave $100-million to fight Ebola and nearly $200-million to his foundation.
By Maria Di Mento
Senior Editor
No. 37: Gordon and Llura Liggett Gund
The couple gave more than $58-million to a group Mr. Gund co-founded to fight blindness.
By Maria Di Mento
Senior Editor