The move will see the company, which launched in 1990, change its name to River Street Events.
Managing director Laura Biggs has funded the acquisition alongside outside investors Keith Harris and Paul Michael from business-to-business events organiser Quartz, as well as Turret Media, the Abu Dhabi-based media investment group.
BBC Haymarket Exhibitions was a joint venture between Haymarket’s exhibitions division and BBC Worldwide, and included such shows as the BBC Good Food Shows and BBC Gardeners’ World Live.
Kevin Costello, chief executive of Haymarket Media Group, said: "We have long enjoyed a great partnership with BBC Worldwide running a very successful jointly-owned exhibition business. As part of the ongoing Haymarket strategy, the time has come for Haymarket to focus on its solely-owned brands.
"We are pleased that as part of this process, Laura Biggs, who has been managing director for the last eight years, is able to take over the running of this business and we wish Laura and the team every success for the future."
He added that Haymarket will continue to run its exhibition portfolio which includes Autosport International, Clothes Show Live and Cereals.
Nicholas Brett, BBC Worldwide’s director of publishing, added: "We are delighted that Laura and the senior management team will continue to run the BBC Good Food Shows and BBC Gardeners’ World Live. Laura has been working on the shows for over 12 years and understands the importance and heritage of these core BBC brands.
"Our relationship with Haymarket started more than 20 years ago. It has been a very successful joint venture from which both parties have enjoyed great benefits. But following a long-term review, we have jointly decided to part company to allow the BBC Good Food Shows and BBC Gardeners’ World Live to develop and prosper further under a new licensing arrangement."
Biggs commented: "I am delighted that BBC Worldwide and Haymarket have given me and my fellow shareholders and directors the opportunity to be able take over the BBC Haymarket Exhibitions portfolio. I have a great passion for these shows and I very much look forward to continuing to be part of this fantastic business in the future."
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