"It's really good to see three winners acting like winners," he said.
"They've had a tough time, they've all adapted in different ways in different markets and they're all coming out ahead."
The three companies are due to graduate from the programme, which gave them mentoring and support from the business school as well as low-interest finance, later this year.
Hannan said the vision Bidwill had was for the companies to expand overseas and at the same time give the business school an opportunity to interact with some real-world entrepreneurial business people.
"Charles is a very practical businessman and as much as anything he wanted the students to see the world outside the world of business theory."
The success of the Entrepreneurs' Challenge in what is a high-risk investment space prompted Bidwill to last year add another $1 million to the fund, matched by $1 million from an anonymous donor.
The Entrepreneurs' Challenge is now on the hunt again for New Zealand's next business success story, celebrating with a launch event at the University of Auckland Business School today.
Companies have until the end of the month to register interest in participating in the Entrepreneurs' Challenge.
"[Bidwill's] words to me were that he'd love us to find another Apple or something like that and he readily acknowledges that that's a very long shot, but again he's a real believer in not shrinking from the task and having a go," Hannan said.
"That's the culture that these successful entrepreneurs have."