System1 Group PLC provided earnings guidance for the first half of 2018. For the period, the company expected to stabilize gross Profit (main top-line performance indicator), albeit at a slower rate than the company anticipated at the start of the year. The company expected Gross Profit for the half year to be some 5% below that of the comparable period. Underlying pre-tax profits, pre-ad ratings and share based payments, are expected to be around £1.9 million, some 73% above the £1.1 million achieved in first half of 2017/18.