Why is Kainos stock sliding today?

Kainos, a Belfast-based IT services firm, saw its stock plummet 8.2% on the day following the release of its interim results for the period ending 30th September 2026. The company reported a surge in lower-margin subcontracted work, which led to a significant drop in group gross margin from 48.0% to 43.1%. Despite revenue increasing by 37% to £268.8 million, management's guidance for the full year was reduced to "in line" with current market expectations, a significant step down from the previous optimistic outlook.

This margin deterioration was mainly attributed to the increased use of contractors and supply partners to expedite major new projects. Roughly 60% of this contractor drag was considered temporary, while the remaining 40% was seen as a structural shift towards leveraging partners for larger prime-contractor contracts. The company's decision to forgo another share buyback further dampened investor sentiment.

The broader market also played a role, with the FTSE 100 and STOXX 600 both declining. Kainos opened the day at 1200p but saw its share price drop to as low as 1087p, a decline that was the sharpest single-session fall in recent months. Despite a 6% raise in the interim dividend to 10.4 pence, the overall mixed results raised questions about the company's ability to regain profitability as it transitions to a contractor-centric growth phase.