System1 Group, the marketing decision-making platform listed on AIM, saw its shares jump 19% to 253.2p after the company said strong new business wins would drive record second-half revenue and push profitability ahead of market expectations in its next financial year.
The company said trading in the final quarter of the year ending 31 March 2026 had been strong, with full-year revenue expected to be in line with previous guidance of broadly flat at around £37 million.
The more significant signal for investors was the outlook for the following year. System1 said it now expects adjusted earnings before interest, tax, depreciation and amortisation (EBITDA) for the year ending March 2027 to be materially ahead of the current market forecast of £4.3 million, with a margin of at least 15%.
The upgrade reflects the benefits of a cost optimisation programme, including changes to the group's organisational structure, sales incentives and go-to-market approach, which will reduce the cost base as revenue grows.
Chief executive James Gregory said new business wins had accelerated through the final quarter, with double-digit growth in innovation product sales and deepening engagement with major brand clients.
One-off restructuring costs will be reflected in the current year's results, with further detail to be provided alongside full-year figures due in July 2026.
Chairman Rupert Howell said the company had the right offering and team to deliver double-digit revenue growth while expanding margins.