This first logo consists of 4 lines arranged in a square. The four lines represent your four companies. Invergo in a square that summarizes the four lines / companies had become one unit. These lines can also be seen as the silhouettes of buildings. Then if you see a break line above the first line. That's a point. So the first line is a letter i. This refers to the word Invergo. So in addition to a symbolism, this logo also hides an initials from the company hidden there.