Many of those affected were elderly people.
According to Folkbladet one principal is sentenced to three years and ten months in prison for gross fraud and money laundering. Another principal is sentenced to three years in prison.
Both principals are also sentenced to pay damages.
A woman is also sentenced to probation and damages for four cases of money laundering, one of which is serious, reports SVT Öst.
The others involved in fraud are sentenced to probation and compensation for different numbers of money laundering offences.
In total, the convicted must pay several million in damages.