The other form of takeover is the destructive one. If I (Megacorp plc registered Lichtenstein) feel threatened by a new upstart I can take them over, skim off any valuable IP, "redeploy" their human assets and sell off anything else worth selling. I win and the shareholders may well win because the competition has been neutered. Unrestricted capitalism naturally favours monopolies.
An advanced variation can be found if you look at what happened in Russia after the end of Communism. With a total lack of effective regulation you had a period of anarcho-Capitalism. Here the takeovers were carried out with extreme prejudice, eventually leading to huge monopoly companies which in turn became arms of the state.