My design is a combination of traditional font and a modern layout. I feel that even though some flowing type is quite attractive and classical, the most important factor should be legibility with impact.
Even at a small size my design is strong, distinctive and quite eye catching. And the change of name for the sub-companies is only a simple matter.
As an added option, you might consider altering the graphic to suit each of the sub-companies.
In these designs, the logo is complete inside the oval enabling the versatility of use. In fact one can used the logo as a sticker for various applications.