However, research by BDO said that compared favourable to the AIM all share index which was down 7.5 per cent between April and the end of June.
The 28 Scottish firms had a combined market capitalisation of more than £1.8 billion.
The biggest increase in market capitalisation was seen by support services firm Frontier IP with a 41.4 per cent rise.
The largest faller was retail advertising specialist Spaceandpeople which was down 51.1 per cent in the period. Neil McGill, corporate finance director with BDO, said: "The relative stability of the shares in Scottish AIM listed companies during a pretty volatile second quarter is encouraging."