AIM-listed anti-microbial technology company Byotrol posts a pre-tax loss of £804,981 for the six months to the end of September - up from £804,981 last time.
Revenues rose to £934,076 from £909,073 and gross profits of £343,384 were up from £283,472 a year ago.
Operating costs increased by 17%, largely reflecting a 62% increase in sales and marketing spend and the operating loss before share based payments increased to £592,000 from £514,000.
The group said the results were in-line with previous guidance with improved sales and gross margin.
Chief executive David Traynor said: 'Having spent the last three years redeveloping our technologies for the new regulatory regimes, we are now investing heavily in sales and marketing, including extensive redevelopment of product propositions.
'To that end we were very pleased that investors further supported our strategy with a £4.6m financing in the period; we believe that we now have the resources to fully execute our growth strategy.'