Tom Grogan, a 35-year-old entrepreneur, became a multimillionaire after selling a majority stake in Wingstop UK to a US-based private equity firm in a deal valued at £400 million ($532 million). Yet he says he has failed to find joy in early retirement and plans to return to work.

After nearly a decade of building the UK brand from scratch — from sending a cold email to Texas and facing 50 investor rejections to finally opening 57 restaurants — Tom Grogan told Fortune that navigating life after the sale has been an entirely different challenge.

From a construction worker to a multimillionaire

The entrepreneur began his career as a construction worker, earning just $5 an hour, but fate had other plans. By his early 20s, he had become a founder. However, he admits that the change from

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