They’re just turning into conglomerates.

It was common in the post wwii era in America and its Asian allies like Korea with its chaebols and Japan with its somethings I can’t remember the name of. The Asian countries forms were normally based around a single family, we’ll need more time with the current US form to see if they are also dynastic

The Japanese, family-owned, generally pre-WWII conglomerates were called zaibatsus. After WWII they were (nominally) dissolved and the now more loosely connected groups of companies are called keiretsus.