Thanks to Elliott Dunne for sending in this list:
The following is a complete list of all previous WWE Money in the Bank Ladder Match winners:
2006: Rob Van Dam
2007: Mr. Kennedy. Kennedy later lost the Money in the Bank contract to Edge in a match where the briefcase was on the line.
2008: CM Punk
2009: CM Punk
2010: Jack Swagger
2010: The Miz