Grouping resources - moving different divisions of a company to azure.

In 365 I typically create seperate tenants for a company but it gets a bit messy when I have a company with multiple domains in a single tennant but probably the best choice when you have a few companies that are subdivisions of a larger firm.

I'm new to azure and when I look at all the resources, I'd love some way to move them to a subcategory or master group so that if I have a company that has several divisions but the controlling company wants them under a single azure account, it is easy to differentiate them. Right now they only have one division in azure. If I log into azure, I see the resources listed and there are a lot of VMs, disks, network interfaces, etc and it would be great if my home page could say company A and all the resources for that company were listed under it and Company B had all company B resources grouped in it.