The Apprentice's most successful winners to date

As the 18th series of The Apprentice ended on Thursday 18th April, with Rachel Woolford winning the show, we often wonder what happened to the previous winners of the hit show?!

Here we take a look at where the likes of Mark Wright, Ricky Martin, and Harpreet Kaur, to find out who was the most successful winner from the show.

The research, conducted by UK financial services provider CMC Markets used the latest financial reports from Endole to discover the latest report of net assets in each of The Apprentice winners’ businesses, to determine which of them are the most successful.

Who is the most successful winner of The Apprentice?

A spokesperson for CMC Markets commented on the research, saying: “As a new series of The Apprentice gets underway, it is interesting to look back at past winners and their businesses to see how Lord Sugar’s investment made a difference.

"Not only can the investment from Lord Sugar be transformative for many contestants’ business but the brand recognition from being featured on the show can also greatly increase the winner’s chances of successfully running their business, even many years after appearing on the series.”

The 18th series of The Apprentice concluded on Thursday 18th April, with fitness fanatic Rachel Woolford winning Lord Sugar's £250,000 investment.

All episodes of The Apprentice are now available on BBC iPlayer.

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• The Apprentice