The net asset value of the trust increased by 7.5 per cent to 75.6p in the six months ending 31 May, compared with 70.3p a year earlier.
Net revenue from ordinary activities before tax declined to pounds 5m from pounds 6.2m. The interim dividend was maintained at 9p.
Throgmorton's board said: 'Since May the stock market as a whole has come back from the high levels seen in the weeks following the general election.
'But the trust's portfolio has continued to perform better than the indices for the small companies sector.'