A person or company that conglomerates; someone who gathers many different businesses or things together into one group.
Conglomerate plus the agent suffix -or (one who does). Person or entity that performs the action of conglomerating.
Warren Buffett might be called the greatest conglomerator of the modern era—he's spent decades buying completely different companies and holding them under Berkshire Hathaway like a giant businessman playing checkers.
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