Columbia lays claim to half as many Fortune 100 heads as Harvard, but that's still a strong enough showing to rate it second among the B-schools.
It's no surprise that three out of the four CEOs are leading the charge at financial institutions: Columbia has long had a reputation for being a finance powerhouse and a straight path to Wall Street.
The alumni are:
*Buffett has a master's of science in economics.
NEXT: Northwestern - Kellogg School of Management