Here is a high-quality article written by Antti Leinonen about F-Secure. 
If F-Secure succeeds in growing its sales, the business scales quickly, meaning the company does not need new resources to generate revenue. F-Secure’s profitability is at an excellent level, but according to Koyfin’s data, it is on a downward trend. This is largely due to the acquisition and Lookout’s lower profitability. The free cash flow margin has remained at an excellent level.