What happens if I buy shares in a company that itself owns other companies?

Buying shares of a parent corporation generally means you indirectly acquire everything that parent owns, including its subsidiaries, unless something is carved out before closing. The parent's shares are what you're legally buying, but its value, and its liabilities, flow from everything sitting underneath it in the corporate structure — you can't buy the parent while pretending its subsidiaries don't come along.

The nuance is that due diligence needs to look through the whole structure, not just at the parent corporation on its own. Each subsidiary can have its own contracts, debts, employees, and legal history, and any of that can affect what you're actually buying, even if your attention was focused on one particular operating business inside the group. It's also worth confirming exactly how the subsidiaries are owned — wholly, or with other shareholders involved at that level too — since that affects how much control you actually get over each piece.

If you only want part of what the group holds, buying the specific subsidiary directly, rather than the parent, or negotiating a pre-closing carve-out of the pieces you don't want, are the usual alternatives. A business lawyer mapping the full group structure before you commit is essential here.