> ## Documentation Index > Fetch the complete documentation index at: https://docs.spott.io/llms.txt > Use this file to discover all available pages before exploring further. # Company Hierarchy > Link a client's parent company, subsidiaries, business units, and divisions so you see the whole group from any record in it. Big clients are rarely one company. A group can hold separate legal entities per country, business units with their own hiring managers, and divisions per product line. The **Hierarchy** tab on a [company record](/docs/companies/company-record) connects those records so you can see the whole group from any company inside it, instead of keeping the structure in your head. The Hierarchy tab showing a parent company with subsidiaries nested under it The tab shows the whole group as a tree. The company you are on is marked **Current**, and every other company shows its relationship to the company above it. Open the Hierarchy tab from any company in the group and you see the same tree. ## Add companies to the group Click **Add child** to attach the companies that belong to this one. In the **Add children** dialog, the parent is already filled in. Search for one or more companies, pick the **Relation to parent**, and click **Add children**. The Add children dialog with the parent prefilled, a company search, and a relation to parent field Use **Change parent** in the top right to attach the company you are on to a group, or to move it under a different parent. Every company in the tree has a **⋮** menu with the rest of the actions: * **Add child**: hang another company under that one, which is how you build a tree more than two levels deep. * **Change relation to parent**: correct the relationship type afterwards. * **Remove from hierarchy**: detach that company from the group. The row menu with Add child, Change relation to parent, and Remove from hierarchy ## Types of relationships The relation is set on the link between a company and its parent, so one group can mix all three. It is required and defaults to **Subsidiary**. | Relationship | Use it for | | ----------------- | -------------------------------------------------------------------------------------------------------------------- | | **Subsidiary** | A separate legal entity owned by the parent, such as a country entity or an acquired company that kept its own name. | | **Business unit** | A commercial unit inside the group, often with its own budget and its own hiring managers. | | **Division** | A structural part of the parent, for example split by product line or region. | The Relation to parent dropdown with Subsidiary, Business unit, and Division Picking the right type matters when you report on a client group or need to know which entity actually signs the contract. ## How deep a hierarchy goes A hierarchy is a tree, not a single parent-child pair. A child company can have its own children, as in the example above where a regional entity sits under another subsidiary, so a group with a holding, national entities, and divisions under those is one connected structure. Each company sits in **one hierarchy at a time**, with a single parent, which keeps the tree unambiguous.