Michael Krasny (born 1952/1953) is an American billionaire businessman from Illinois. He is the founder and former chief executive officer of CDW Corporation, a direct seller of technical gadgets including computers and networking equipment.

Krasny grew up in a Jewish family in Illinois.^[3][4] He graduated from the University of Illinois Gies College of Business in 1975.^[1] He worked as a Toyota car salesman at his father's auto dealership in Arlington Heights, Illinois. In 1981, he quit his job as a car salesman and took some classes in computer programming but being unsuccessful in finding steady work, Krasny was forced to sell his own computer for cash. He placed a $3 ad in the Chicago Tribune and ended up selling his computer for a $200 profit.^[4]

Seeing the great demand for computers, Krasny began buying computers to resell them eventually forming MPK Computers. A year later he changed the name to Computer Discount Warehouse (CDW) and steadily grew the business. In 1993, he took CDW public.^[4] Krasny retired in 2007 after selling the company to Madison Dearborn Partners for $7.3 billion.^[1] According to Forbes, his first caller from 1982 was still a customer as of 2000.^[1] Since 2009, as a hobby, Krasny has operated a woodworking shop in Northbrook, Illinois called Custom Woodworking Design, making plaques and awards.^[4]

Krasny is married, with one child. He lives with his family in Highland Park, Illinois.^[1]