3i has agreed to sell the care home in which it invested £1.5 million 10 years ago, taking a 38% stake. The private equity firm later backed a £110 million management buyout of the company in 2005 .
Delta Fund is 100% owned by the Qatar Investment Authority (QIA), a trust run by the Qatari royal family.
London-based Three Delta, also funded by QIA, provided corporate finance services on the deal and also administers Delta Fund investments.
Care Principles, established in 1997, provides care, treatment and rehabilitation for adults with learning disabilities and behavioural disorders.
The company has more than 380 occupied beds and employs more than 1,500 staff. It provides assessment, treatment, care and rehabilitation for adults requiring long-term therapy and treatment for learning disabilities and mental health problems.