Not sure if conglomerate is the way to go becuase it says in wikipedia ; A conglomerate is a combination of two or more corporations engaged in entirely different businesses that fall under one corporate group.
This is just a company that owns many business' (subsidiaries) and controls all of them , not buying shares of those business' or not couple of big companies getting together to create a bigger one or so.
Don't think about like a food company like mcdonalds or so merging with something totally irrelevant like nike or whatever and get nikedonalds or something.
Think of like Koch Industries or Procter and gamble something like that , just one big company owns several small companies %100 owned by them but each of them irrelevant to each other