The central thesis of Mitt Romney’s presidential campaign is the argument that his business experience has left him uniquely well-prepared to run the American economy and spur job growth.

“In the business I had, we invested in over 100 different businesses and net-net, taking out the ones where we lost jobs and those that we added, those businesses have now added over 100,000 jobs,” Romney has said.

Although fact checkers have debunked Romney’s 100,000 jobs claim, it is true that some of the companies that Bain invested in — such as Staples and The Sports Authority — have prospered. Many others have not. In fact, according toThe Wall Street Journal, 22 percent of the businesses that Bain invested in during Romney’s tenure went bankrupt within 8 years

Here are 6 of the companies that suffered major job losses under Bain’s leadership:

Ampad

385 jobs lost.

GST Steel

750 jobs lost

Dade International

1,900 jobs lost.

Dynamic Details, Inc. (DDi)

2,100 jobs lost.

Clear Channel

2,500 jobs lost.

KB Toys

3,400 jobs lost.