Trinity Mirror is paying £50.5m in cash for HotGroup, which has an online and traditional recruitment business.
It has more than 2m registered users on its network of websites, which include Workthing.com, Planetrecruit.com, Jobsfinancial.com and Hotrecruit.com.
Its traditional recruitment business has divisions for education, legal, pharmaceuticals, leisure and retail.
The HotGroup board recommended Trinity's offer on September 1.
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