Allen owns a 99.9% share of the A & S Leisure Group which runs Napoleons Casinos across England, as well as the greyhound racing track at Owlerton Stadium in Sheffield.
Allen came under severe criticism from some supporters throughout the tenure of manager Paul Sturrock, especially for what was perceived as forcing fan favourites such as Steve MacLean and Jon-Paul McGovern out of the club.
However, the appointment of caretaker manager Sean McAuley and his eventual successor Brian Laws did see an improvement in results.
[2] Dave Allen continued to own 10% of Sheffield Wednesday FC until December 2010, when he sold his shares to new Owls owner Milan Mandaric.
In April 2009 it was reported that Allen would invest about £4 million in Chesterfield F.C., while still keeping most of his shares in Sheffield Wednesday,[3] and in 2012 he took over as chairman.